JPH0962822A - Human body movement detection device and detection device for number of passing peoples - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a human body shift detection device and a detection device for the number of passing peoples, which can easily, highly precisely and inexpensively detect a human body and the number of passing peoples with high reliability and which can accurately detect the number of passing peoples at the gateway of wide width. SOLUTION: A sensor head 41 detecting a human body 45 installed at the upper part of the gateway 44 a room and a signal processing circuit 42 setting a threshold based on a floor surface temperature detected by the sensor head 41, judging the existence of the human body when the output value of the sensor head 41 detects rise/fall against the threshold and judging movement between the elements of the sensor head 41 of the detected value are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a human body movement detecting apparatus and a passing person number detecting apparatus for detecting the moving direction of a human body at an entrance or the like and the number of people passing by using an infrared array sensor.

[0002]

2. Description of the Related Art In recent years, in security, air-conditioning control, and lighting control, there is an increasing demand for measuring the condition of people in the room and the temperature distribution in order to detect the presence or absence of people in the room and the amount of activity. Further, it is required for companies and the like to grasp and manage the number of visitors and exiters of a room or building by managing the occupants.

[0003] Conventional occupant management includes a method of having a person register at a reception desk in a building or a room, a method of counting with a manual counter at the entrance of a room, a method of mechanically entering and leaving each person and counting. is there.

Further, JP-A-3-196286, 5-3
A method of installing a pressure sensor on a mat such as a narrow doorway or stairs such as 24955 to detect the number of people and the moving direction, and JP-A-3-186998, 4-95794, 5-81.
There is a method of counting the moving direction and the number of people using a plurality of infrared sensors such as 503. That is, the human body can be detected by detecting the weight of the human body, the moving direction and the number of people passing through can be detected, and the human body can be detected by detecting the infrared rays emitted from the human body, and the signal thereof is air-conditioned. Equipment for detecting infrared sources using infrared sensors has come to be used for the purpose of controlling environmental control equipment such as aircraft and lighting equipment, crime prevention systems, etc., and for measuring the number of people entering and leaving. It was

[0005]

However, in the above-mentioned method, when the number of people is counted by using a person, the cost is high, and it is very cumbersome, time-consuming, and mechanically detected. In the method, it is necessary to install a large-scale equipment, the cost is very high, and there is a problem that the equipment cannot be installed.

Further, in the method of detecting a human body using a plurality of infrared sensors, since a plurality of sensors are used at the entrance and the like, the cost becomes high, and it is not possible to know whether all the entrances and exits are detected, resulting in erroneous detection. It tends to occur a lot,
There is a problem that it is not possible to accurately measure the number of people. In particular, in the case where a human body continuously passes under the sensor or the human body intersects with each other, there are many erroneous detections and erroneous determinations, and there is a problem that accurate human body detection cannot be performed. Furthermore, each of these methods requires a signal processing method, an algorithm, or the like suitable for the method, but it has not been disclosed at all.

Further, there is a problem that it is very difficult to accurately detect the number of people passing by at a wide entrance and exit of a department store, an exhibition, an exhibition pavilion, an art museum, a museum or the like having a width of 1 m or more.

In consideration of such a problem of the conventional human body detection, the present invention can easily perform highly accurate and highly reliable human body detection or passing person detection at low cost, and
It is an object of the present invention to provide a human body movement detection device and a passage number detection device that can accurately detect the number of people passing through a wide entrance / exit.

[0009]

SUMMARY OF THE INVENTION The present invention provides an infrared array sensor having a plurality of elements arranged in the direction of movement of a person, and for each element of the infrared array sensor, the rising edge of an output signal in a predetermined time zone and And / or movement of a human body in an area targeted by the infrared array sensor using a predetermined rule based on signal change detection means for detecting a change in the falling edge and the detected values of the respective elements of the infrared array sensor. It is a human body movement detecting device having a determining means for determining.

Therefore, for example, the human body movement detection device detects and judges persons entering and leaving a room or building, and measures the number of people passing through to obtain accurate numbers of visitors and persons in the room. Can be detected. In particular, if you set the threshold value based on the temperature of the floor surface that the infrared sensor always sees, you can always feed back the temperature fluctuation of the floor surface. Can be made to follow, and since the upper and lower threshold values are set with respect to the reference value, it is possible to detect a low temperature object having a low temperature. Furthermore, by checking the slope of the sensor output, that is, the amount of change, or by always setting the maximum number of people detected in each element to a value other than the maximum value (-1), continuous passing and crossing The number of people passing by can be detected more accurately. In addition, if there is a step that is not judged as a human body of 2 steps or less between steps where the sensor output is corrected by multiplying the sensor output value from the adjacent element by the crosstalk ratio and the human body is judged, By forcibly determining the step as a human body, the human body can be accurately detected and the moving direction and the number of passing people can be more accurately detected even when low-temperature or high-temperature objects are mixed.

Further, by combining the software as the processing method and the pyroelectric element, it is possible to obtain an accurate and highly reliable sensor for detecting the number of people passing by, which is compact in system and inexpensive in cost. It is possible to easily and immediately detect the number of people in the room. Especially,
By using this detection device and sensor system, erroneous detection as in the case of using a plurality of sensors is not seen, and highly reliable human body detection and passing person detection can be performed accurately.

Further, the present invention relates to a plurality of infrared array sensors having a plurality of elements arranged in the direction of movement of a person and each element of each infrared array sensor,
Based on the appearance of the signal change detecting means for detecting a change in rising and / or falling of the output signal in a predetermined time zone and the appearance state of the detected values of each element of each infrared array sensor between each infrared array sensor, The human body movement detection device is provided with a determination unit that determines the movement of the human body in the area covered by the plurality of infrared array sensors by using the above rule.

Therefore, for example, by judging the appearance state of the detection values detected by a plurality of infrared sensors temporally and spatially, it is possible to accurately detect the human body at a wide entrance and exit, and the number of passing people. You can do it.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing an embodiment. (Embodiment 1) FIG. 1 is a schematic diagram of a sensor head equipped with a pyroelectric infrared sensor used in the first embodiment of the present invention. In FIG. 1, the pyroelectric element 1
1 is composed of 8 elements, and the sensor head is composed of this pyroelectric element 11, an infrared transmitting lens 13, and a chopper 14. The chopper 14 is provided on the front surface of the lens and intermittently blocks the infrared rays 17 entering the infrared lens 13. The chopper 14 is mechanically connected to a brushless motor 16 by a chopper shaft 15 so that the chopper 14 can rotate, and is made very compact.

The applicant of the present invention has devised a passing number detection sensor and a system for detecting the moving direction of the passing human body and the number of people passing by using such a sensor head and managing the number of people in the room. However, the present invention further provides a device to which a new method adapted to this sensor system is applied in order to measure the moving direction and the number of people passing by with high accuracy.

In general, an infrared sensor is an example of a human body detection sensor used in an apparatus for detecting an infrared source.
Two types of infrared sensors are known: a quantum sensor that captures infrared rays as photons, and a thermal sensor that absorbs infrared rays as electromagnetic waves and utilizes changes in the physical properties of the element that occur as a result of thermal action that raises the temperature of the element. However, since the former usually requires cooling with liquid nitrogen or the like, a thermal sensor is generally used. Among thermal sensors, the pyroelectric infrared sensor has higher sensitivity than others, so
It is suitable for infrared source detection. However, since the pyroelectric infrared sensor basically detects changes in infrared light, if you try to detect a stationary infrared source, the infrared light will intermittently enter the sensor light receiving part by some method. It is necessary to devise to do so. Usually, infrared rays are intermittently incident (chopping) on the sensor light receiving portion by rotating or vibrating a chopper such as a disk with a slit or a flat plate.

2 and 3 show an example of the hardware configuration for detecting the moving direction using the above-mentioned sensor head. In FIG. 2 or FIG. 3, the signal processing circuit 23 determines the moving direction from the sensor head 21 via the relay box 22 and displays it on the computer or the display device 24 as the passing person number measuring means. At this time, a relay box may be incorporated in the signal processing circuit 32 as shown in FIG. FIG. 4 shows a state where the hardware is actually installed above the entrance of the room. Width 100
cm, height 220 cm, the sensor head 41 is installed at the upper center of the doorway 44 of a room, which is usually seen, so that the floor is always viewed and the array direction of the sensor array is parallel to the passing direction. , Through the signal processing circuit 42, the computer or the display device 43 displays the distinction between entry and exit. If the angle of incidence of the sensor at this time is 6 °, the detection area 46 as shown in FIG. 4 is obtained.
It can be seen that the human body 45 can be sufficiently detected even when it passes the most end.

FIG. 5 shows an overall flow chart for detecting the moving direction at this time. The analog signal of each step for each chopping output from the infrared sensor is processed through a signal processing circuit to be a digital output value. In obtaining the moving direction of the human body based on this digital value, first, the floor temperature, which is the background, is sampled for a certain period of time, and the value obtained by averaging this is used as the reference value. On the other hand, the upper and lower thresholds are set where a certain width is given, binarization processing is performed, and if the digital output value exceeds the upper limit of this threshold or falls below the lower limit, it is judged that a human body exists. However, by detecting the movement of the digital output value that exceeds the upper limit of the above threshold value or falls below the lower limit between the elements of the infrared array sensor, the direction of movement of the human body, the distinction between entry and exit can be detected and determined. To do. That is, in the threshold value setting means, the signal change detection means, and the signal processing circuit as the determination means,
Set the upper and lower thresholds based on the detected floor temperature,
The output signal from the infrared array sensor with the threshold as a reference detects, for example, a rising from the bottom to the top and a falling from the top to the threshold with respect to the upper limit, and based on the detection result, a predetermined rule is set. Use it to determine the movement of the human body. Here, the determination is made using both the rising and falling edges of the detected value, but if there is almost no false detection in the detected value of each element, the determination is made using only one of the rising edge and the falling edge of the detected value. Good.

FIG. 6 is a flow chart of the background averaging process at this time. Further, FIG. 7 shows a flowchart of a binarization process of digital output data. In FIG. 7, 1 is given as binarized data when the upper limit threshold is exceeded, -1 is given as binarized data when the lower limit threshold is exceeded, and 0 otherwise. And A specific example obtained as a result of this is shown in FIG. FIG. 8 shows an example in which the moving direction of data after binarization processing can be detected. The horizontal direction represents the element, and the vertical direction represents the step due to chopping. The solid squares represent points where the binarized data is 1 or -1, and the open circles represent points where the binarized data is 0. As in these examples, if the point of 1 or -1 is continuously moving over 3 elements or more, the moving direction can be determined. It should be noted that when the background temperature is sampled for a certain period of time and a reference value is obtained by averaging the background temperature, when an output value that exceeds the upper limit of the set threshold value or falls below the lower limit is detected, that is, While the human body is being detected, it is necessary to retain the obtained reference value and not update it.

By this method, the human body can be detected with high reliability and high accuracy, and the moving direction can be determined, and the moving direction detection rate, which has been about 90% in the past, is 99.
%.

As described above, according to the present embodiment, by installing the fixed type pyroelectric infrared sensor using the wide-angle lens and the chopper at the upper center of the entrance of the room or the passage of the building, People entering a room or building can be easily detected, and the direction of movement can be determined with high accuracy and reliability. (Embodiment 2) Next, a passing passenger detecting apparatus according to a second embodiment of the present invention will be described with reference to the drawings.

Since the sensor head used in this embodiment is the same as that shown in FIG. 1, the description thereof will be omitted. Also, the hardware configuration for detecting the number of people passing by using this sensor head is basically the same as that shown in FIG.
However, in the present embodiment, a function of measuring the number of persons who have passed through the detection area of the sensor head for each moving direction and detecting the number of persons in the room, for example, is further added.
The signal processing circuit 23 measures the number of people passing through from the sensor head 21 via the relay box 22 and displays the number on the computer or the display device 24. Further, the situation when actually installed on the upper part of the doorway of the room by this hardware configuration is the same as in FIG. 4 described above. Here, the number of visitors, the number of exits, and the number of people in the room are displayed on the computer or the display device 43.

FIG. 9 shows an overall flow chart for detecting the number of people passing by at this time. Similar to the above-described first embodiment, the analog signal of each step for each chopping output from the infrared sensor is processed by the signal processing circuit to be a digital output value. Based on this digital value, the number of people passing through the human body In order to obtain, first, the floor surface temperature, which is the background, is sampled for a certain period of time, and as shown in FIG. 6, the value obtained by averaging this is used as a reference value, and a certain width with respect to this reference value. Where the upper and lower thresholds are set, and as shown in FIG.
Performs binarization, and if the digital output value exceeds the upper limit of this threshold value or falls below the lower limit, it is determined that a human body exists, and the digital output value exceeds the upper limit of this threshold value or falls below the lower limit. The movement direction of the human body is detected and determined by determining the movement between the elements of the infrared array sensor.

In the present embodiment, further, in the step (H) judged to be a human body and the step (L) not judged to be a human body according to this threshold value, the change from L to H and the change from H to L are made. Adopt the smaller number of people in the number of people entering and leaving the area, and after completing the passage of the human body, sort the number of people entering and leaving each element, and count the maximum value with two or more elements. By adopting, the number of passing human bodies is detected.

FIG. 10 is a flow chart for detecting / totalizing the number of passing people in the passing number detecting device at this time. In addition, FIG. 11 is a diagram showing a specific example of each element for detecting the number of people passing through at the time of entry and exit and the result of aggregation. For each element, entry / exit is determined at a change point (L → H, H → L) of binary data, and when passage is detected, a counter is incremented. This entry / exit determination is as shown in FIG.
If the point 1 of 1 or -1 is continuously moving over 3 elements or more, and if it has a relationship with the point 0 of 0 as shown in the figure, the moving direction is determined and the number of people passing through the element is detected. can do. However, even if the search result is OK, if the binarized data at the location X is 1, the search is canceled and another pattern array is searched.

Further, FIG. 12 shows a flow chart of the dust deletion processing of the binarized data in the passing person detecting device, and FIG. 13 shows a concrete example of the dust deletion processing of the binarized data. . In the horizontal direction of FIG.
8, that is, the position of the human body, and the vertical direction represents the chopping step.

From these figures, when the digital output value exceeds the upper limit of the threshold value or falls below the lower limit, it is determined that the human body is present, but the elements on both sides and one step before and after detect the presence of the human body. If it is not, the part where the human body exists is forcibly deleted. That is, the binary data is O
This means that if there is no part that is turned on even in N, it is forcibly turned off (deleted). By doing so, noise and dust when the S / N is bad can be erased.

With these methods, the human body can be detected with high reliability and high accuracy, the moving direction can be determined, and the number of people passing can be measured. Of 95% or more.

As described above, according to the present embodiment, by installing the fixed type pyroelectric infrared sensor using the wide-angle lens and the chopper in the center of the upper part of the entrance of the room or the passage of the building, People entering a room or building can be easily detected, and the number of people passing through can be measured with high accuracy and reliability. (Third Embodiment) Next, a passing passenger detecting apparatus according to a third embodiment of the present invention will be described with reference to the drawings.

The structure of the sensor head is the same as that shown in FIG.
The situation when the sensor head is actually installed above the entrance of the room is the same as in FIG. 4 described above.

Similar to the above-described first embodiment, the analog signal output from the infrared sensor at each step for each chopping is processed by the signal processing circuit to become a digital output value, and the human body is based on this digital value. To obtain the number of people passing through, first, the floor surface temperature that is the background is sampled for a certain period of time, and as shown in FIG. 6, the value obtained by averaging this is used as a reference value. The upper and lower thresholds are set where there is a certain width, and binarization processing is performed as shown in FIG.
If the digital output value exceeds the upper limit of this threshold value or falls below the lower limit, it is judged that a human body exists, and the digital output value exceeds the upper limit of this threshold value or falls below the lower limit,
The movement direction of the human body is detected and determined by determining the movement between the elements of the infrared array sensor.

In the present embodiment, further, in the step (H) determined to be a human body and the step (L) not determined to be a human body based on this threshold value, the change from L to H and the change from H to L. When the smaller of the number of people entering and leaving the area is adopted, and after passing through the human body, the number of people entering and leaving each element is sorted, and only one element is counted as one person. Detects the number of people passing by as one person. FIG. 14 is a specific example in which the number of passing people can be detected by this processing. As a result, even a human body that does not completely pass through the detection area can be sufficiently detected.

As described above, according to the present embodiment, by installing the fixed type pyroelectric infrared sensor using the wide-angle lens and the chopper at the center of the upper part of the entrance of the room or the passage of the building, People entering a room or building can be easily detected, the number of people passing through can be measured with high accuracy and reliability, and the number of people in the room can be displayed. (Fourth Embodiment) Next, a fourth embodiment of the number-of-passages detecting apparatus of the present invention will be described with reference to the drawings.

The structure of the sensor head is the same as that shown in FIG.
The situation when the sensor head is actually installed above the entrance of the room is the same as in FIG. 4 described above.

Similar to the above-described first embodiment, the analog signal output from the infrared sensor at each step for each chopping is processed by the signal processing circuit to become a digital output value, and the human body is based on this digital value. To obtain the number of people passing through, first, the floor surface temperature that is the background is sampled for a certain period of time, and as shown in FIG. 6, the value obtained by averaging this is used as a reference value. The upper and lower thresholds are set where there is a certain width, and binarization processing is performed as shown in FIG.
If the digital output value exceeds the upper limit of this threshold value or falls below the lower limit, it is judged that a human body exists, and the digital output value exceeds the upper limit of this threshold value or falls below the lower limit,
The movement direction of the human body is detected and determined by determining the movement between the elements of the infrared array sensor.

In the present embodiment, further, if there is a step (L) not judged to be a human body of 2 steps or less between steps (H) judged to be a human body by this threshold value, it is forced. The number of people passing through the human body is detected by performing an interpolation process in which L is changed to H.

FIG. 15 shows a flow chart of the interpolation processing of the binarized data in the passing passenger detecting apparatus of this embodiment, and FIG. 16 shows a concrete example of the interpolation processing of the binarized data. There is. By performing such a treatment, it is necessary to detect two persons when passing through a human body wearing a winter overcoat, a human body with uneven temperature distribution, or a human body with a mixture of low and high temperature regions. There is no such thing, and I can now judge exactly as one person.

As described above, according to the present embodiment, by installing the fixed type pyroelectric infrared sensor using the wide-angle lens and the chopper in the center of the upper part of the entrance of the room or the passage of the building, A human body having a non-uniform temperature distribution entering a room or building can be easily detected, the number of people passing through can be measured with high accuracy and reliability, and the number of people in the room can be displayed. (Fifth Embodiment) Next, a fifth embodiment of the present invention will be described with reference to the drawings, which shows a passing passenger number detecting apparatus.

The structure of the sensor head is the same as that shown in FIG.
The situation when the sensor head is actually installed above the entrance of the room is the same as in FIG. 4 described above.

Similar to the above-described first embodiment, the analog signal output from the infrared sensor at each step for each chopping is processed by the signal processing circuit to become a digital output value, and the human body is based on this digital value. To obtain the number of people passing through, first, the floor surface temperature that is the background is sampled for a certain period of time, and as shown in FIG. 6, the value obtained by averaging this is used as a reference value. The upper and lower thresholds are set where the predetermined width is given, and binarization processing is performed as shown in FIG.
At this time, in the present embodiment, this digital output value is corrected by multiplying the digital output value of each element by the ratio of crosstalk from nearby elements, and the corrected digital output value is the upper limit of the threshold value. When the value exceeds the upper limit or falls below the lower limit, it is determined that a human body exists, and the movement of the digital output value that exceeds the upper limit of this threshold value or falls below the lower limit between the elements of the infrared array sensor is determined.

Further, in the step (H) judged to be a human body and the step (L) not judged to be a human body by this threshold value, the entrance / exiters at the places changing from L to H and the changes from H to L. The smaller of the number of people is selected, the number of people entering and leaving each element is sorted after the passage of the human body is completed, and the maximum value counted by two or more elements is adopted, Detect the number of people passing by.

FIG. 17 shows a flow chart of the crosstalk processing in the passing passenger number detecting apparatus according to the present embodiment. By performing this process, even if there is a large amount of crosstalk between elements, the digital output value can be corrected, and the binarization process is performed based on this correction value. The human body can be detected.

As described above, according to the present embodiment, by installing the fixed type pyroelectric infrared sensor using the wide-angle lens and the chopper at the center of the upper part of the entrance of the room or the passage of the building, People entering a room or building can be detected more accurately, and the number of people passing through can be measured with high accuracy and reliability. (Sixth Embodiment) Next, a sixth embodiment of the present invention will be described with reference to the drawings.

The structure of the sensor head is the same as in FIG.
The situation when the sensor head is actually installed above the entrance of the room is the same as in FIG. 4 described above.

Similar to the above-described first embodiment, the analog signal output from the infrared sensor at each step for each chopping is processed by the signal processing circuit to become a digital output value, and the human body is based on this digital value. To obtain the number of people passing through, first, the floor surface temperature that is the background is sampled for a certain period of time, and as shown in FIG. 6, the value obtained by averaging this is used as a reference value. The upper and lower thresholds are set where there is a certain width, and binarization processing is performed as shown in FIG.
If the digital output value exceeds the upper limit of this threshold or falls below the lower limit, it is determined that a human body exists. At this time, in the present embodiment, even if this digital output value exceeds the upper limit of the threshold value or falls below the lower limit, if the digital output value decreases or increases more than a certain slope, it is forcibly forced. It is determined that the human body is absent, and the movement direction of the human body is detected by determining the movement of the digital output value that exceeds the upper limit of this threshold or falls below the lower limit between the elements of the infrared array sensor. to decide.

Further, in the step (H) judged to be a human body by this threshold value and the step (L) not judged to be a human body, there are persons who enter and leave at a place changing from L to H and a place changing from H to L. Use the smaller of the number of people to judge the number of people entering and exiting each element after completing the passage of the human body, and adopting the maximum value counted by 2 elements or more, continuous passage Detects the number of human bodies.

FIG. 18 shows a flow chart of the binarization processing of raw data in the passing passenger number detecting apparatus according to the present embodiment. With this, it is possible to detect the output reduction between human bodies in the case of continuous passage with high accuracy, thereby accurately separating the human body, for example,
If they are separated by about 10 cm, it can be judged as a separated human body.

As described above, according to the present embodiment, the fixed type pyroelectric infrared sensor using the wide-angle lens and the chopper is installed at the center of the upper part of the entrance of the room or the passage of the building. A continuous passing human body entering a room or a building can be easily detected, the number of continuous passing persons can be measured with high accuracy and high reliability, and the number of people in the room can be displayed.

By installing the infrared sensor in the center of the entrance of a building or a room or the upper part of a passage in this way, when the human body moves into the infrared detection area, the human body can be detected. Furthermore, since it is possible to accurately determine the moving direction of multiple human bodies and the number of people passing through, it is possible to know in real time how many people entered and left the room, and by doing so, the presence of each room in the building It is possible to detect the number of people in the room accurately, accurately and immediately with high reliability. (Embodiment 7) Next, an apparatus for detecting the number of passing passengers according to a seventh embodiment of the present invention will be described with reference to the drawings.

The structure of the sensor head is the same as that shown in FIG.
The situation when the sensor head is actually installed above the entrance of the room is the same as in FIG. 4 described above.

Similar to the above-described first embodiment, the analog signal output from the infrared sensor at each step for each chopping is processed by the signal processing circuit to be a digital output value, and the human body is based on this digital value. To obtain the number of people passing through, first, the floor surface temperature that is the background is sampled for a certain period of time, and as shown in FIG. 6, the value obtained by averaging this is used as a reference value. The upper and lower thresholds are set where there is a certain width, and binarization processing is performed as shown in FIG.
If the digital output value exceeds the upper limit of this threshold value or falls below the lower limit, it is judged that a human body exists, and the digital output value exceeds the upper limit of this threshold value or falls below the lower limit,
The movement direction of the human body is detected and determined by determining the movement between the elements of the infrared array sensor.

In the present embodiment, further, in the step (H) judged to be a human body and the step (L) not judged to be a human body according to this threshold value, the change from L to H and the change from H to L are made. When the maximum value is detected in one element, the smaller of the number of people entering and leaving the area is adopted, and the value (maximum value -1) is forcibly entered in the other element, After the passage is completed, the number of people entering and leaving each element is sorted, and the maximum value counted by two or more elements is adopted to detect the number of consecutive passing human bodies.
That is, when the next second human body is detected in one element during continuous human body passage, even if the first human body is not detected in all the elements, the first human body is automatically detected in all the elements. By assuming that the human body is detected, it is possible to accurately detect the continuous passing human body.

FIG. 19 shows a concrete example of the passing person detection result in each element in the passing person detecting device of the present embodiment and the totalized result thereof. In this way, it has become possible to detect a continuous human body that does not completely pass through the detection area sufficiently accurately.

As described above, according to the present embodiment, by installing the fixed type pyroelectric infrared sensor using the wide-angle lens and the chopper at the center of the upper part of the entrance of the room or the passage of the building, A continuous human body entering a room or a building can be easily and accurately detected, the number of consecutive passing persons can be measured with high accuracy and high reliability, and the number of persons present in the room can be displayed. (Embodiment 8) Next, an apparatus for detecting the number of passing passengers according to an eighth embodiment of the present invention will be described.

The structure of the sensor head is the same as that shown in FIG.
The situation when the sensor head is actually installed above the entrance of the room is the same as in FIG. 4 described above.

Similar to the above-described first embodiment, the analog signal output from the infrared sensor at each step for each chopping is processed by the signal processing circuit to become a digital output value, and the human body is based on this digital value. To obtain the number of people passing through, first, the floor surface temperature that is the background is sampled for a certain period of time, and as shown in FIG. 6, the value obtained by averaging this is used as a reference value. The upper and lower thresholds are set where there is a certain width, and binarization processing is performed as shown in FIG.
If the digital output value exceeds the upper limit of this threshold value or falls below the lower limit, it is judged that a human body exists, and the digital output value exceeds the upper limit of this threshold value or falls below the lower limit,
The movement direction of the human body is detected and determined by determining the movement between the elements of the infrared array sensor.

After that, if the digital output value exceeds the upper limit of the threshold value or falls below the lower limit, it is determined that the human body exists, but if the elements on both sides and one step before and after do not detect the presence of the human body, The part where the human body exists is forcibly deleted. In addition, if there is a step (L) that is not judged to be a human body by 2 steps or less between the step (H) judged to be a human body by the threshold value, an interpolation process for forcibly setting L to H is performed. To do. In addition, the smaller of the number of people entering and leaving the area where the change from L to H and the area where H changes to L is adopted, the number of people entering and leaving each element after the passage of the human body is completed. And the maximum value counted by two or more elements is used to detect the number of passing human bodies. Alternatively, if only one element is counted by one person, it is determined that one person has passed, and the number of persons passing through the human body is detected.

In this way, the human body can be accurately detected even with respect to the temperature fluctuation of the floor surface, the low temperature object and the high temperature object can be detected in the same manner, and the detection area can be completely detected. It has become possible to detect even a passing human body that has not passed. Further, even in the case of an element having a poor S / N or in the case of generation of noise or dust, it is possible to erase them, and it is possible to accurately detect the moving direction and measure the number of passing human bodies.

As described above, according to the present embodiment, the fixed type pyroelectric infrared sensor using the wide-angle lens and the chopper is installed at the center of the upper part of the entrance of the room or the passage of the building. People entering a room or building can be easily detected, the number of people passing through can be measured with high accuracy and reliability, and the number of people in the room can be displayed.

As described above, the passing passenger detecting sensor system in which the infrared sensor, the passing passenger detecting device, and the display device are interlocked with each other is very simple in terms of the system. In addition to cost, reliable and accurate human body detection and occupant number determination can be performed, and a comfortable intelligent building can be provided. (Ninth Embodiment) Next, a passing passenger number detecting apparatus according to a ninth embodiment of the present invention will be described.

The structure of the sensor head is the same as that shown in FIG.
The situation when the sensor head is actually installed above the entrance of the room is the same as in FIG. 4 described above.

In the present embodiment, the binarization processing is performed in the same manner as in the sixth embodiment, and when the digital output value exceeds the upper limit of this threshold value or falls below the lower limit, the human body is present. Even if this digital output value exceeds the upper limit of the threshold value or falls below the lower limit, if the digital output value decreases or increases more than a certain slope, the non-existence area of the human body is forced. The movement direction of the human body is detected and determined by determining the movement of the digital output value that exceeds the upper limit of the threshold value or falls below the lower limit between the elements of the infrared array sensor.

Further, the step (H) judged to be a human body by the threshold value and the step (L) not judged to be a human body.
Then, the smaller one of the number of people entering and leaving when changing from L to H and changing from H to L is adopted, and when the maximum value is detected in one element, the other element (maximum Value-1) is forcibly entered, and after passing through the human body, the number of people entering and leaving each element is sorted, and the maximum value counted by two or more elements is used to continuously Detects the number of passing human bodies. That is, when the next second human body is detected in one element during continuous human body passage, even if the first human body is not detected in all the elements, the first human body is automatically detected in all the elements. By assuming that the human body is detected, it is possible to accurately detect the continuous passing human body.

As a result, it is possible to detect a decrease in output between human bodies in the case of continuous passage with high accuracy, to accurately separate the human bodies, and to separate the human bodies with a distance of about 10 cm. You can judge. Furthermore, it has become possible to detect even a continuous human body that does not completely pass through the detection area with sufficient accuracy. As described above, according to the present embodiment, by installing the infrared sensor in the center of the upper part of the entrance or exit of a building or room, when the human body moves into the infrared detection area, the human body can be detected. it can. Furthermore, since it is possible to accurately determine the moving direction of multiple human bodies and the number of people passing through, it is possible to know in real time how many people entered and left the room, and by doing so, the presence of each room in the building It is possible to detect the number of people in the room accurately, accurately and immediately with high reliability. (Tenth Embodiment) Next, a tenth embodiment of the present invention will be described with reference to the drawings.

FIG. 20 is an overall flowchart of the passing passenger number detecting apparatus according to the tenth embodiment of the present invention. The structure of the sensor head is the same as that in FIG. 1, and the appearance when the sensor head is actually installed above the entrance of the room is also the same as that in FIG. 4 described above.

In the present embodiment, the binarization processing is performed in the same manner as in the sixth embodiment, and when the digital output value exceeds the upper limit of the threshold value or falls below the lower limit of the threshold value, the human body is present. Even if this digital output value exceeds the upper limit of the threshold value or falls below the lower limit, if the digital output value decreases or increases more than a certain slope, the non-existence area of the human body is forced. The movement direction of the human body is detected and determined by determining the movement of the digital output value that exceeds the upper limit of the threshold value or falls below the lower limit between the elements of the infrared array sensor.

After that, when the digital output value exceeds the upper limit of the threshold value or falls below the lower limit, it is determined that the human body exists, but if the elements on both sides and one step before and after do not detect the presence of the human body, The part where the human body exists is forcibly deleted. In addition, if there is a step (L) that is not judged to be a human body by 2 steps or less between the step (H) judged to be a human body by the threshold value, an interpolation process for forcibly setting L to H is performed. To do. Furthermore, the smaller one of the number of people entering / leaving at the point of changing from L to H and the point of changing from H to L is adopted, and when the maximum value is detected in one element, the other element ( By forcibly entering the value of maximum value -1) and after the passage of the human body is completed, the number of people entering and leaving each element is sorted, and by adopting the maximum value counted by 2 elements or more, Detects the number of consecutive human bodies. When only one element is counted by one person, it is determined that one person has passed, and the number of people passing through the human body is detected.

FIG. 21 is a diagram showing a concrete example in which the number of passing people can be detected by the passing number detecting device of the present embodiment.
(A) is passed by a human body partly having a low surface temperature wearing an overcoat, and (b) is 2 under the sensor.
When a human body of a person intersects, (c) is a detection result when the human body passes continuously. From these results, interpolation processing is performed in (a), inclination detection of the sensor output in (b), and (maximum value-
It has been found that taking the value of 1) is very effective.

By these methods, it becomes possible to detect the human body with high reliability and with high accuracy, determine the moving direction, and measure the number of people passing by. Of 95% or more.

As described above, according to this embodiment, the fixed type wide-angle lens and the pyroelectric infrared sensor using the chopper are installed at the center of the upper part of the entrance of the room or the passage of the building. The number of people passing through can be easily detected with high accuracy and reliability.

In each of the above embodiments, the background is the floor surface, but the present invention is not limited to this, and may be a wall surface other than the floor surface.

In each of the above-described embodiments, the chopping cycle of the pyroelectric infrared sensor is not particularly described, but by setting the chopping cycle to 10 Hz or more, human body detection can be performed faster, more accurately, and with higher accuracy. It can be carried out.

As described above, by installing an infrared sensor capable of detecting a human body at the entrance or exit of a building or room, or at the top or side of a corridor, people entering or leaving a room or building It is possible to accurately detect the number of occupants and the number of occupants by detecting and determining the above and measuring the number of passing people. In particular, since the threshold value is set based on the temperature of the floor surface that the sensor is looking at at all times, it is possible to constantly feed back the temperature fluctuations of the floor surface, etc. The hold value can be made to follow, and since the upper and lower threshold values are set with respect to the reference value, a low temperature object with a low temperature can also be detected.

Furthermore, the slope of the sensor output, that is, the amount of change is observed, and the number of persons detected in each element is continuously set to a value other than the maximum value (maximum value -1) to obtain continuous values. The number of people passing or crossing can be detected more accurately. In addition, if there is a step that is not judged as a human body of 2 steps or less between steps where the sensor output is corrected by multiplying the sensor output value from the adjacent element by the crosstalk ratio and the human body is judged, By forcibly determining the step as a human body, the human body can be accurately detected and the moving direction and the number of passing people can be more accurately detected even when low-temperature or high-temperature objects are mixed.

By combining the software as this processing method and the pyroelectric element, it is possible to obtain an accurate and highly reliable sensor system for detecting the number of people passing, which is compact in system and inexpensive in cost. It is possible to easily and immediately detect the number of people in the room. Especially,
By using this detection device and sensor system, erroneous detection as in the case of using multiple sensors is not seen, and it can greatly contribute to accurate and reliable human body detection and passing person detection. it can. in this way,
This moving direction and passing person detection device is very simple in terms of program, and by using this algorithm, accurate human body detection with almost no false detection even during continuous passage or crossing passage can be easily performed at low cost. Can be done. Therefore, by using the present invention, it is possible to easily and highly accurately detect a human body and measure the number of people in the room, and it is possible to greatly contribute to a comfortable intelligent building system. (Embodiment 11) Next, an apparatus for detecting the number of passing passengers according to an eleventh embodiment of the present invention will be described with reference to the drawings.

FIG. 22 is a hardware configuration diagram for detecting the moving direction using the sensor head of FIG. In FIG. 22, the sensor output from the sensor head 2221 is processed by the signal processing circuit 2222, and the controller 222
The number of passing people is determined in 3 and displayed on the computer 2224 or the display device 2225. FIG. 23 shows a state where the hardware configuration is actually installed in the upper part of the entrance / exit of a department store or the like. Width 200 cm, height 250
4 sensor heads 331 at equal intervals on top of the very wide entrance / exit 335 cm, with the floor constantly being viewed,
In addition, the sensor array is installed so that the array direction is parallel to the passing direction of the human body, and the number of visitors, the number of people leaving, and the number of people in the room are displayed on the computer 333 or the display device 334 through the signal processing circuit 332. Assuming that the incident angle of the sensor at this time is 3 °, the detection area 337 as shown in FIG.
Therefore, it can be understood that even if the shoulder width of the human body 336 is about 40 cm, it can be sufficiently detected no matter where the human body passes if the sensor interval is about 50 cm.

FIG. 24 shows an overall flow chart for detecting the passing human body at this time. The analog signal of each step for each chopping output from the infrared sensor is processed through a signal processing circuit to be a digital output value. When obtaining the number of people who pass through the human body based on this digital value, first, the floor temperature that is the background is sampled for a certain period of time, and the value obtained by averaging this is used as the reference value. On the other hand, the upper and lower thresholds are set where a certain width is given, binarization processing is performed, and if the digital output value exceeds the upper limit of this threshold or falls below the lower limit, it is judged that a human body exists. To do. At this time, in this embodiment, since four infrared array sensors are installed, a predetermined rule is used to detect the infrared array sensor whose digital output value exceeds the upper limit of the threshold value or falls below the lower limit thereof. By determining the movement between adjacent elements and the movement between adjacent infrared sensor heads, that is, the transition appearance state of the detected values between infrared array sensors, the movement direction of the human body, the entrance, and the exit are distinguished. Is detected and judged.

Here, specific examples of the background averaging process, the digital output data binarizing process, and the binarizing process are basically the same as those in the first embodiment (FIGS. 6 and 7). , 8). A specific example of the binarized data dust removal process and the binarized data dust removal process is also performed in the same manner as in the second embodiment (FIG. 12, FIG.
13).

With these methods, the human body can be detected with high reliability and high accuracy and the moving direction can be determined, and the moving direction detection rate, which was about 90% in the past, can be increased to 99% or more. I was able to.

As described above, according to the present embodiment, a plurality of pyroelectric infrared sensors, each of which is a fixed type and has a wide-angle lens and a chopper, are arranged at equal intervals in the center of the upper entrance of a wide doorway or a building. By installing in, it is possible to easily and accurately detect a person entering a room or a building, and to determine the moving direction with high accuracy and high reliability. (Embodiment 12) Next, a method for detecting the number of passing passengers according to a twelfth embodiment of the present invention will be described with reference to the drawings.

The hardware configuration and the entire flow chart for detecting the number of people passing through in this embodiment are basically the same as those in the eleventh embodiment (FIG. 2).
3, 24). That is, the floor temperature that is the background is sampled for a certain period of time, a reference value is obtained by averaging this, and the upper and lower threshold values are set. If it exceeds the upper limit of this threshold or falls below the lower limit, it is determined that a human body is present, and the digital output value that exceeds the upper limit of the threshold or falls below the lower limit of the infrared array sensor between adjacent elements. The movement direction of the human body is detected and determined by determining the movement and the movement between the adjacent infrared sensor heads, that is, the transition appearance state of the detection value between the infrared array sensors. In the present embodiment, further, in the step (H) determined to be a human body and the step (L) not determined to be a human body according to this threshold value, the change from L to H and the change from H to L are performed. By adopting the smaller of the number of people entering and leaving, and after completing the passage of the human body, sorting the number of people entering and leaving by each element, and adopting the maximum value counted by two or more elements ,
Detects the number of people passing by.

FIG. 10 shows a flow chart of the passing person number detection / totalization in the passing person number detecting method at this time. Further, FIG. 25 shows a specific example of each sensor and each element for detecting the number of people passing through at the entrance and exit, and a total result. Each sensor,
For each element, entry / exit is determined at a change point (L → H, H → L) of binary data, and when passage is detected, a counter is incremented. This entry / exit determination is based on the above 11th
As in the embodiment of FIG.
If the point (1) is continuously moving over 3 elements or more, and the relationship with the point (0) is as shown in the figure, the moving direction can be determined and the number of people passing through the element can be detected. . However, even if the search result is OK, if the binarized data at the location X is 1, the search is canceled and another pattern array is searched.

By these methods, it becomes possible to detect the human body with high reliability and with high accuracy, judge the moving direction, and measure the number of people passing by. Of 95% or more.

As described above, according to the present embodiment, a plurality of pyroelectric infrared sensors, each of which is a fixed type and has a wide-angle lens and a chopper, are provided at equal intervals in the center of the upper part of a wide doorway or a passageway of a building. By installing the device in the room, it is possible to easily detect people who enter the room or building, measure the number of people passing through with high accuracy and reliability, and display the number of people in the room. (Thirteenth Embodiment) Next, a thirteenth embodiment of the present invention will be described with reference to the drawings.

The hardware configuration and the overall flow chart for detecting the number of people passing through in this embodiment are basically the same as those in the eleventh embodiment (FIG. 2).
3, 24). That is, the floor temperature that is the background is sampled for a certain period of time, a reference value is obtained by averaging this, and the upper and lower threshold values are set, and further, binarization processing is performed, and the digital output value is If it exceeds the upper limit of this threshold or falls below the lower limit, it is determined that a human body is present, and the digital output value that exceeds the upper limit of the threshold or falls below the lower limit of the infrared array sensor between adjacent elements. The movement direction of the human body is detected and determined by determining the movement and the movement between the adjacent infrared sensor heads, that is, the transition appearance state of the detection value between the infrared array sensors. In the present embodiment, further, during the step (H) determined to be a human body by the threshold value, the step (L) not determined to be a human body of 2 steps or less.
If there is, the interpolating process for forcibly setting L to H is performed to detect the number of passing human bodies.

FIG. 15 shows a flow chart of the interpolation processing of the binarized data, and FIG. 16 shows a concrete example of the interpolation processing of the binarized data. By performing such a treatment, it is necessary to detect two persons when passing through a human body wearing a winter overcoat, a human body with uneven temperature distribution, or a human body with a mixture of low and high temperature regions. There is no such thing, and I can now judge exactly as one person.

As described above, according to the present embodiment, a plurality of fixed, wide-angle lenses and pyroelectric infrared sensors using choppers are provided at equal intervals on a wide doorway or an upper part of a building passage. By installing it, it is possible to easily detect the human body entering the room or building where the temperature distribution is not constant, and it is possible to measure the number of people passing through with high accuracy and reliability, and display the number of people in the room. Can be made. (Fourteenth Embodiment) Next, a method for detecting the number of passing people according to a fourteenth embodiment of the present invention will be described with reference to the drawings.

The hardware configuration and the overall flow chart for detecting the number of people passing through in this embodiment are basically the same as those in the eleventh embodiment (FIG. 2).
3, 24). First, the floor temperature, which is the background, is sampled for a certain period of time, and a reference value is obtained by averaging this to set the upper and lower limit thresholds.
Performs binarization processing. Next, in the present embodiment, when the digital output value exceeds the upper limit of the threshold value or falls below the lower limit, it is determined that a human body exists, and the digital output value exceeds the upper limit of the threshold value or falls below the lower limit. If the digital output value decreases or increases more than a certain slope even if it is below the threshold, it is forcibly judged to be the non-existence area of the human body, and the digital value that exceeds the upper limit of this threshold or falls below the lower limit. Movement of the output value between adjacent elements of the infrared array sensor,
Movement between adjacent infrared sensor heads, i.e.
The movement direction of the human body is detected and determined by determining the transition appearance of the detected value between the infrared array sensors. Further, a step (H) judged to be a human body and a step (L) not judged to be a human body by this threshold value.
Therefore, the smaller of the number of people entering / leaving at the point of changing from L to H and the point of changing from H to L is adopted, and after the passing of the human body is completed, The number of consecutive passing human bodies is detected by performing sorting and adopting the maximum value counted by two or more elements.

FIG. 18 shows a flowchart of the raw data binarization process in the above embodiment. As a result, it is possible to detect the output decrease between human bodies in the case of continuous passage with high accuracy, thereby accurately separating the human body, and if the distance is about 10 cm, it is possible to obtain the separated human body. You can judge.

As described above, according to the present embodiment, a plurality of pyroelectric infrared sensors, each of which is a fixed type and has a wide-angle lens and a chopper, are arranged at equal intervals in the upper center of a wide entrance or a passage of a building. By installing it in, it is possible to easily detect continuous passing human bodies entering a room or building,
It is possible to measure the number of consecutive passengers with high accuracy and reliability and display the number of people in the room.

By installing a plurality of infrared sensors in the center of the upper part of the entrance or exit of a building or room in such a manner as to match the detection area, when the human body moves into the infrared detection area, the human body is detected. be able to. further,
Since it is possible to accurately determine the movement direction of multiple human bodies and the number of people passing through, it is possible to know in real time how many people entered the room and how many people left, and by doing so,
It is possible to detect the number of people in each room of a building accurately, accurately and immediately with high reliability. (Fifteenth Embodiment) Next, a fifteenth embodiment of the present invention will be described with reference to the drawings.

The hardware configuration and the entire flow chart for detecting the number of people passing through in this embodiment are basically the same as those in the eleventh embodiment (FIG. 2).
3, 24). That is, the floor temperature that is the background is sampled for a certain period of time, a reference value is obtained by averaging this, and the upper and lower threshold values are set, and further, binarization processing is performed, and the digital output value is If it exceeds the upper limit of this threshold or falls below the lower limit, it is determined that a human body is present, and the digital output value that exceeds the upper limit of the threshold or falls below the lower limit of the infrared array sensor between adjacent elements. The movement direction of the human body is detected and determined by determining the movement and the movement between the adjacent infrared sensor heads, that is, the transition appearance state of the detection value between the infrared array sensors. In the present embodiment, further, in the step (H) determined to be a human body and the step (L) not determined to be a human body according to this threshold value, the change from L to H and the change from H to L are performed. The smaller of the number of people entering and leaving is adopted, and when the maximum value is detected in one element, the value of (maximum value -1) is forcibly entered in the other element, and the passage of the human body is completed. After that, the number of people entering and leaving each element is sorted, and the maximum value counted by two or more elements is adopted to detect the number of consecutive passing human bodies. That is, in the case where the next second human body is detected in one element during continuous human body passage,
Even if the second human body is not detected in all the elements, the continuous human body can be accurately detected by automatically assuming that the first human body is detected in all the elements.

FIG. 26 shows a concrete example of the result of detection of the number of people passing by each element in the above-mentioned embodiment and the result of tabulation.
As a result, it has become possible to detect even a continuous human body that does not completely pass through the detection area with sufficient accuracy.

As described above, according to the present embodiment, a plurality of pyroelectric infrared sensors, each of which is a fixed type and uses a wide-angle lens and a chopper, is provided in the detection area at the center of the upper part of a wide doorway or a passageway of a building. It is possible to easily and accurately detect continuous human bodies entering a room or building, and to measure the number of consecutive passengers with high accuracy and reliability, by Can be displayed. (Sixteenth Embodiment) Next, a sixteenth embodiment of the present invention will be described with reference to the drawings.

The hardware configuration of this embodiment is the same as that of the eleventh embodiment (see FIG. 23), but the processing method is different from the previous embodiments.
The floor surface temperature is sampled for a certain period of time, and the upper and lower thresholds are set two by two with respect to the reference value obtained by averaging this, and the digital output value of this digital output value is set. The ternary processing is performed, and when the digital output value exceeds the upper limit above the threshold or falls below the lower limit below the threshold, it is determined that a human body exists. In this embodiment, the digital output value that is above the upper limit above the threshold or below the lower limit is moved between adjacent elements of the infrared array sensor, and between adjacent infrared sensor heads. When the movement is judged, and when the digital output value is between the two upper limits of the threshold value or between the two lower limits of the threshold value, the elements between the adjacent infrared sensor heads are synchronized with each other and the sensors are similarly detected. If the output is obtained, it is possible to detect the number of passing human bodies by determining that the same person has passed.

FIG. 27 is a diagram showing the relationship between the sensor output and the threshold value in the above embodiment. When one human body passes between the sensor 1 and the sensor 2, the peak outputs of the sensor 1 and the sensor 2 exist between the threshold values 1 and 2. At this time, when only the threshold value 1 is output to both sensors, it is detected that two people pass, and when only the threshold value 2 is set, the number of passing people is erroneously detected as 0. As in this embodiment, two thresholds are set, a peak output occurs between these thresholds, the sensors 1 and 2 are synchronized, and the human body enters the sensors 1 and 2 at the same timing. If it is determined that it is determined that one person has passed, the erroneous detection as described above can be prevented. FIG. 28 is a diagram showing a specific display result of the sensors 1 and 2 in the present embodiment. The horizontal direction represents the sensor element, that is, the position of the human body, and the vertical direction represents the chopping step, that is, time. When a human body enters the sensors 1 and 2 at the same timing as shown in this figure, and both sensor outputs are in the middle of the two threshold values, it is determined that one person has passed.

Further, even in the case of a low temperature object, since two threshold values are similarly set, the same detection can be performed.

As described above, according to the present embodiment, a plurality of fixed pyroelectric infrared sensors using wide-angle lenses and choppers are installed in the detection area at the center of the upper part of a wide doorway or a passageway of a building. Installed so that the threshold is 2
By setting them individually, the human body passing between the detection areas of the sensor can be easily and accurately detected, and the number of consecutive passengers can be measured with high accuracy and reliability, and the number of people in the room can be counted. Can be managed. (Embodiment 17) Next, a method for detecting the number of passing passengers according to a seventeenth embodiment of the present invention will be described with reference to the drawings.

The hardware configuration and the overall flow chart for detecting the number of people passing through in this embodiment are basically the same as those in the eleventh embodiment (FIG. 2).
3, 24). That is, the floor temperature that is the background is sampled for a certain period of time, a reference value is obtained by averaging this, and the upper and lower threshold values are set, and further, binarization processing is performed, and the digital output value is If it exceeds the upper limit of this threshold or falls below the lower limit, it is determined that a human body is present, and the digital output value that exceeds the upper limit of the threshold or falls below the lower limit of the infrared array sensor between adjacent elements. The movement direction of the human body is detected and determined by determining the movement and the movement between the adjacent infrared sensor heads. In the present embodiment, further, a layered structure for watching the change in the sensor output of each element in the adjacent infrared sensor is formed, and it is possible to detect the movement of the human body between the infrared sensors. When the detection is stopped, the same number of adjacent infrared sensors, or the elements that are continuous in time and space are detected. can do.

FIG. 29 is a view of the detection areas of the two sensors and the human body moving direction 183 as seen from above in the above embodiment. When the passing human body moves from the detection area 181 of the sensor 1 to the detection area 182 of the sensor 2, the specific display result is as shown in FIG. Figure 3
It is possible to detect / determine that one person has passed by searching for a path of movement by using a hierarchical structure such as 0 (b) by temporally and spatially overlapping.

As described above, according to the present embodiment, a plurality of pyroelectric infrared sensors, each of which is a fixed type and uses a wide-angle lens and a chopper, is provided in the detection area at the upper center of a wide entrance or a passage of a building. It is possible to easily detect the human body moving between the sensors easily by accurately searching for the passing human body by providing a hierarchical structure between the sensors. The number of people who continuously pass can be measured by sex, and the number of people in the room can be managed. (Embodiment 18) Next, an apparatus for detecting the number of passing passengers according to an eighteenth embodiment of the present invention will be described with reference to the drawings.

The hardware configuration of this embodiment is the same as that of the eleventh embodiment (FIG. 23). FIG. 31 shows an overall flow chart for detecting the number of people passing by in the present embodiment. The analog signal of each step for each chopping output from the infrared sensor is processed through a signal processing circuit to be a digital output value. In obtaining the number of passing human bodies based on this digital value, first, a certain range is given to the reference value obtained based on the floor surface temperature in the same manner as in the sixteenth embodiment described above. Set two upper and lower thresholds to
When the digital output value is ternarized and the digital output value exceeds the upper limit above the threshold or falls below the lower limit below, it is judged that a human body is present and the upper limit above the threshold is exceeded. Alternatively, the movement of the digital output value below the lower limit between the adjacent elements of the infrared array sensor and the movement between the adjacent infrared sensor heads are determined. When the digital output value is between the two upper limits of the threshold value or between the two lower limits of the threshold value, the same sensor output is obtained in synchronization with each element between the adjacent infrared sensor heads. For example, it is determined that the same person has passed.

Further, a layered structure for observing a change in sensor output of each element in an adjacent infrared sensor is formed,
Human movement between infrared sensors can be detected, and it is no longer detected by one element of the infrared sensor, and at the same time, it can be detected by adjacent or adjacent elements of the infrared sensor that are continuous in time or space. For example, the number of passing human bodies is detected by determining that the same person is passing.

Further, even if the digital output value exceeds the upper limit of the threshold value or falls below the lower limit thereof, if the digital output value decreases or increases more than a certain slope, the non-existence region of the human body is forced. It is judged that the human body is judged to be a human body according to the threshold value (H) and the step not judged to be a human body (L).
If the maximum number is detected in a certain element, the smaller one of the number of people entering and leaving the area where
The value of (maximum value -1) is forcibly input to other elements, and after the passage of the human body is completed, the number of people entering and leaving each element is sorted, and the maximum value counted by two or more elements By adopting, the number of consecutive passing human bodies is detected.

Further, if there is a step (L) not judged to be a human body of 2 steps or less between the steps (H) judged to be a human body by the threshold value, it is forcibly set to L.
By performing an interpolation process in which H is set to H, the number of people passing by is detected. Also, if the digital output value exceeds the upper limit of the threshold value or falls below the lower limit, it is determined that the human body is present, but if the presence of the human body is not detected by the elements on both sides and one step before and after, it is forced. Delete the human body part.

FIG. 32 shows a specific example in which three sensors are actually used to detect passage in the human body detecting method according to the above-described embodiment. FIG. 32 (a) shows the case where three human bodies pass side by side in the same direction, and FIG. 32 (b) shows one person for sensor 1, two persons for sensor 2, and one person for sensor 3 in the opposite direction. It shows the display result when is passed. It can be seen that in both cases, the human body detection and the number of passing people can be detected accurately.

By doing so, the human body can be accurately detected even with respect to the temperature fluctuation of the floor surface, the low temperature object and the high temperature object can be detected in the same manner, and further, the entire detection area can be completely detected. It has become possible to detect even a passing human body that has not passed. Further, even in the case of an element having a poor S / N or in the case of generation of noise or dust, it is possible to erase them, and it is possible to accurately detect the moving direction and measure the number of passing human bodies.

As described above, according to the present embodiment, a plurality of fixed, wide-angle lenses and pyroelectric infrared sensors using choppers are provided in the detection area at the upper center of a wide entrance or a passageway of a building. The sensors can be moved between sensors by synchronizing the chopping between the sensors, setting two thresholds, and providing a hierarchical structure between the sensors to search for passing human bodies. It is possible to easily and accurately detect a human body passing by, and it is possible to measure the number of consecutive passing persons with high accuracy and reliability, and it is possible to manage the number of persons in the room.

As described above, the passing passenger detecting sensor system in which the infrared sensor, the passing passenger detecting device, and the display device are interlocked is very simple in terms of the system. In addition to cost, reliable and accurate human body detection and occupant number determination can be performed, and a comfortable intelligent building can be provided. (Nineteenth Embodiment) Next, a nineteenth embodiment for detecting the number of passing people will be described with reference to the drawings.

As shown in FIG. 33, three sensor heads are equally spaced above an entrance 222 having a width of 160 cm and a height of 250 cm, and the sensor array is arranged in the array direction. Are installed so that the left and right sensor heads are parallel to the passing direction of the human body, and the sensor heads in the middle are perpendicular to the passing direction of the human body.

In obtaining the number of passing human bodies based on the analog signal of each step for each chopping output from this infrared sensor, first, the floor surface temperature as the background is sampled for a certain period of time and averaged. The upper and lower thresholds are set where there is a certain width with respect to the specified reference value, binarization processing is performed, and the digital output value exceeds the upper limit of this threshold or falls below the lower limit. In this case, it is judged that there are human bodies and the number of people passing through is detected.

At this time, as shown in the detection area of FIG. 33, by installing three infrared sensor heads,
In obtaining the number of people passing by the human body based on the digital output value at each step output from each infrared sensor and processed through the signal processing means, the detection area of this central sensor is By including the detection area of the sensor, the number of people passing by is detected. That is, the number of visitors, the number of persons leaving, and the number of people in the room are displayed on a computer or a display device through the signal processing circuit. If the incident angles of the sensors at this time are 6 ° and 30 °, the detection region 223 will be as shown in the figure, so even if the shoulder width of the human body is about 40 cm, if the sensor interval is about 50 cm, It can be seen that even if the human body passes through, it can be sufficiently detected. Further, when two human bodies pass under the sensors 1 and 3 at the same time, the sensor 2 can detect the lateral human body position and the human body size, so that erroneous detection can be prevented. Further, even when two human bodies pass under the sensor 1 side by side, the size of the human body can be detected by the sensor 2, so that the human body is not erroneously detected as one person.

Thus, the human body can be accurately detected when the human bodies are arranged side by side without separating the human body, and the size of the human body can be detected by the sensor in the center to reliably detect the human body of two or more human bodies. Can be judged as Further, even if two human bodies enter the detection area of the same sensor, the number of passing people can be detected sufficiently accurately.

FIG. 34 shows a specific example in which the number of passing people can be detected in the above embodiment at this time. FIG. 34A shows a case where one human body passes under the sensor 1.
(B) shows the case where one human body in the opposite direction passes under the sensors 1 and 3, respectively. The sensor 2 can detect the size of the human body, and for example, (a)
In the case of (3), it can be detected and determined as one person because it is three elements, and in the case of (b) it is six elements so that two people can be passed.

With these methods, it becomes possible to detect the human body with high reliability and with high accuracy, determine the moving direction, and measure the number of people passing by. Of 95% or more.

As described above, according to the present embodiment, the human body is moved into the infrared detection area by installing the infrared sensor at the entrance or exit of a building or room and changing the arrangement of the sensor array. Then, the size of the human body can be detected. Furthermore, since it is possible to accurately determine the moving direction of multiple human bodies and the number of people passing through, it is possible to know in real time how many people entered and left the room, and by doing so, the presence of each room in the building It is possible to detect the number of people in the room accurately, accurately and immediately with high reliability.

As described above, the passing passenger number detecting sensor system in which the infrared sensor, the passing passenger detecting device, and the display device are interlocked with each other is very simple in terms of the system. In addition to cost, reliable and accurate human body detection and occupant number determination can be performed, and a comfortable intelligent building can be provided. (Embodiment 20) Next, a passing passenger number detection apparatus according to a twentieth embodiment of the present invention will be described with reference to the drawings.

The configuration and operation in this embodiment are basically the same as those in the nineteenth embodiment, but in this embodiment, the array direction of the sensor array is perpendicular to the passing direction of the human body. The number of people passing by is detected by the infrared sensor installed in the center (the sensor in the center). When one person is detected, the number of people passing without counting the output of only one of the infrared sensors installed in parallel (the sensors on both sides) To detect.

FIG. 35 shows a specific example in which the number of passing people in this embodiment at this time can be detected. FIG. 35 (a) shows a case where one human body passes under the sensor 2, that is, in the middle of the sensors 1 and 3, and FIG.
The figure shows the case where one human body passes under the same direction in the same direction. The sensor 2 can detect the size of the human body, and in the case of (a), it has three elements.
It is determined that the person is a person, the output of the sensor 1 alone is used, and the output of the sensor 2 is not taken into consideration. In the case of (b), since there are 6 elements, it can be determined that two people have passed, so the sensor 1,
It is possible to detect and judge the human body so that both outputs can be utilized.

With these methods, the human body can be detected with high reliability and high accuracy, the moving direction can be determined, and the number of people passing can be measured. Of 95% or more.

As described above, according to the present embodiment, the infrared sensor is installed at the entrance of the building or room or the upper part of the passage,
By changing the arrangement of the sensor array, the size of the human body can be detected when the human body moves into the infrared detection area. Furthermore, since it is possible to accurately determine the moving direction of multiple human bodies and the number of people passing through, it is possible to know in real time how many people entered and left the room, and by doing so, the presence of each room in the building It is possible to detect the number of people in the room accurately, accurately and immediately with high reliability.

In the above embodiments, the background is the floor surface in all of the embodiments, but the present invention is not limited to this, and may be a wall surface other than the floor surface.

In the above embodiments, the chopping cycle of the pyroelectric infrared sensor is not particularly described, but by setting the chopping cycle to 10 Hz or more, the human body can be detected more accurately at high speed with high accuracy. It can be carried out.

In each of the above embodiments, the infrared array sensor uses a sensor in which the elements shown in FIG. 1 are arranged in one line, but instead of this, for example, an infrared sensor of 4 × 2 or the like is used. You may use the sensor of the matrix structure of.

In each of the above embodiments, each means such as the signal change detecting means is constituted by dedicated hardware, but instead of this, the same function is realized by software using a computer. Of course it is also good.

Further, in the above eleventh to twentieth embodiments, the infrared array sensor is arranged so as to be perpendicular to the passing direction of the human body, but the arrangement direction is not limited to this, and the array direction is oblique to the passing direction of the human body. The same effect can be obtained even if installed so that

Further, in the above-mentioned 11th to 20th embodiments, the infrared array sensor arranged vertically to the passing direction of the human body has one row, but the present invention is not limited to this, and the infrared array sensor may have two rows, for example. For example, the same effect can be obtained by installing a plurality of rows.

Further, in the above eleventh to twentieth embodiments, the number of infrared array sensors to be installed has been described as two to four, but the number is not limited to this, and for example, as shown in FIG. 6 sensor heads 251 each equipped with an infrared sensor provided with a sensor and a condensing means for condensing infrared rays on the infrared sensor are provided with a width of about 160 cm and a height of 25 cm.
It is installed above the entrance / exit 252 of about 0 cm so that the floor surface is always viewed at intervals of 25 cm, and the detection area 253 is set as shown in the figure. Further, the sensor heads may be arranged in two rows and arranged in a matrix structure. As a result, when the human body passes through the doorway 252 and moves in the detection area, analog outputs are obtained from these infrared sensors,
By processing this analog signal using the signal processing means, the moving direction of the human body, the number of people passing through, and the number of people in the room can be easily obtained.

As described above, by arranging a plurality of infrared ray array sensors, detecting and judging people who enter and exit the building through a wide entrance and exit, and by measuring the number of people passing through, accurate It is possible to detect the number of visitors and the number of people in the room. In particular, to set the threshold value based on the temperature of the floor that the sensor is always looking at,
Since the temperature fluctuation of the floor can be constantly fed back, the threshold value can be made to follow the temperature fluctuation of the floor, and since the upper and lower threshold values are set with respect to the reference value, It is possible to detect a low temperature object having a low temperature. In addition, by checking the slope of the sensor output, that is, the amount of change, or by setting the number of people detected in each element to a value other than the maximum value (maximum value -1) at all times, continuous passage and The number of people passing through the intersection can be detected more accurately. Further, when there is a step less than two steps between the steps determined as the human body and not determined as the human body, the low temperature and high temperature objects are mixed by forcibly determining the step as the human body. Even in such a case, it is possible to accurately detect the human body and more accurately detect the moving direction and the number of people passing by. Furthermore, by synchronizing chopping between adjacent infrared sensors and setting two threshold values, it is possible to accurately detect a human body passing between the sensors. Also,
By determining the sensor output between adjacent infrared sensors using a hierarchical structure, it is possible to accurately detect a human body that has passed over two or more sensors. Further, an array of a plurality of infrared sensors is installed in two rows, a sensor having a vertical sensor array is installed between adjacent infrared sensors, or an infrared sensor is installed obliquely, and a matrix structure element is provided. By using, it is possible to obtain an accurate and reliable passenger detection sensor system,
It is possible to easily and immediately detect the number of people in the room. In particular, by using this detection method and the multi-sensor system, it is possible to greatly contribute to accurate and reliable human body detection and passing passenger detection even at a wide entrance / exit. As described above, the passing person detection method and the passing person detection device are very simple in terms of program, and by using this algorithm, accurate human body detection with almost no false detection even during continuous passage or crossing passage is achieved. Can be easily performed at low cost.
Therefore, by using the present invention, it is possible to easily, accurately and reliably detect a human body in a wide entrance / exit, and to accurately measure the number of people in a room, and a comfortable intelligent building system. Can greatly contribute to

[0130]

As is clear from the above description, the present invention has an advantage that it is possible to easily perform highly accurate and highly reliable human body detection or passing person detection at low cost.

When a plurality of infrared array sensors are installed, there is an advantage that the number of people passing through a wide entrance / exit can be accurately detected.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a pyroelectric infrared sensor in a human body movement detecting device according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing an example of hardware according to the first embodiment.

FIG. 3 is a configuration diagram showing another example of the hardware according to the first embodiment.

FIG. 4 is a diagram showing an installation situation of a sensor head according to the first embodiment.

FIG. 5 is an overall flowchart of the first embodiment.

FIG. 6 is a flowchart of background averaging processing according to the first embodiment.

FIG. 7 is a flowchart of a digital data binarization process according to the first embodiment.

FIG. 8 is a diagram showing an example in which a moving direction of data after binarization processing can be detected in the first embodiment.

FIG. 9 is an overall flowchart of the passing passenger number detection apparatus according to the second embodiment of the present invention.

FIG. 10 is a diagram for detecting the number of passing people in the second embodiment.
It is a flowchart figure of totaling.

FIG. 11 is a diagram showing the number of people passing by in the second embodiment;
It is a figure which shows the specific example of totaling.

FIG. 12 is a flowchart diagram of dust removal processing of binarized data according to the second embodiment.

FIG. 13 is a diagram showing a specific example of dust removal processing of binarized data in the second embodiment.

FIG. 14 is a diagram showing a specific example capable of detecting the number of passing people in the passing person number detecting apparatus according to the third embodiment of the present invention.

FIG. 15 is a flow chart diagram of interpolation processing of binarized data in the passing passenger number detection apparatus according to the fourth embodiment of the present invention.

FIG. 16 is a diagram showing a specific example of interpolation processing of binarized data according to the fourth embodiment.

FIG. 17 is a flow chart diagram of a crosstalk process in the passing person number detection apparatus according to the fifth embodiment of the present invention.

FIG. 18 is a flowchart diagram of raw data binarization processing in the passing passenger number detection apparatus according to the sixth embodiment of the present invention.

FIG. 19 is a diagram showing a specific example of passing person number detection / totalization in the passing person number detecting device according to the seventh embodiment of the present invention.

FIG. 20 is an overall flowchart of a passing passenger number detecting apparatus according to a tenth embodiment of the present invention.

FIG. 21 is a diagram showing a specific example capable of detecting the number of passing people in the tenth embodiment.

FIG. 22 is a hardware configuration diagram of a passing person number detecting method and a passing person number detecting device according to an eleventh embodiment of the present invention.

FIG. 23 is a specific hardware installation configuration diagram in the passing person number detecting method and the passing person number detecting device according to the eleventh embodiment.

FIG. 24 is an overall flowchart of the passing passenger number detecting method according to the eleventh embodiment.

FIG. 25 is a specific example of passing person number detection / totalization in the passing person number detecting method according to the twelfth embodiment of the present invention.

FIG. 26 is a specific example of passing person number detection / counting in the passing person number detecting method according to the fifteenth embodiment of the present invention.

FIG. 27 is a diagram showing a relationship between a sensor output and a threshold value in a passing passengers detecting method according to a sixteenth embodiment of the present invention.

FIG. 28 is a diagram showing a specific display result in the method for detecting the number of passing people in the sixteenth embodiment.

FIG. 29 is a diagram showing a detection area of a sensor and a moving direction of a human body seen from above in a passing passenger number detecting method according to a seventeenth embodiment of the present invention.

FIG. 30 (a) is a diagram showing a specific display result in the seventeenth embodiment, and FIG. 30 (b) is a diagram showing a result by the hierarchical structure.

FIG. 31 is an overall flowchart of a passing passenger number detecting method according to an eighteenth embodiment of the present invention.

FIG. 32 is a specific example capable of detecting the number of people passing by in the method for detecting the number of people passing by according to the eighteenth embodiment.

FIG. 33 is a diagram showing a specific sensor detection area in the passing passengers number detecting apparatus according to the nineteenth embodiment of the present invention.

FIG. 34 is a specific example capable of detecting the number of passing people in the method for detecting the number of passing people of the nineteenth embodiment.

FIG. 35 is a specific example capable of detecting the number of people passing by in the method for detecting the number of people passing by according to the twentieth embodiment of the present invention.

FIG. 36 is a diagram showing an example in which a large number of infrared sensors are arranged to detect the number of passing people in the passing person number detecting apparatus according to the embodiment of the present invention.

[Explanation of symbols]

 11 Pyroelectric element 21, 31, 2221 Sensor head 22 Relay BOX 23, 32, 2222 Signal processing circuit 24, 33, 2224 Computer 45, 336 Human body 46, 223, 337 Detection area 334 Display device

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display location G07C 9/00 G01V 9/04 D G06F 15/62 380

Claims (14)

[Claims] 1. An infrared array sensor having a plurality of elements arranged in a moving direction of a person, and a change in rising and / or falling of an output signal in a predetermined time zone is detected for each element of the infrared array sensor. Signal change detecting means, and based on those detection values of each element of the infrared array sensor, by utilizing a predetermined rule, a determination means for determining the movement of the human body in the area targeted by the infrared array sensor, A human body movement detecting device comprising: 2. The infrared array sensor further includes a threshold setting means for detecting a background temperature and setting a predetermined threshold on the basis of the detected background temperature, wherein the signal change detecting means uses the threshold as a reference. 2. The human body movement detecting device according to claim 1, wherein a change in rising and / or falling of the output signal is detected. 3. The predetermined time period is a time from a time point when the detection values of all the plurality of elements become 0 to a time point when the detection value becomes 0 next time, or 2. The human body movement detection device according to 2. 4. The predetermined rule is that the number of pairs of rising and falling detected for each element is the number of each element. Human body movement detection device. 5. The human body according to claim 1, wherein the predetermined rule is that the number of rises or falls detected for each element is the number of each element. Movement detection device. 6. The predetermined rule is that the number of persons obtained for each of the elements is comprehensively determined and the number of persons is finally determined. Human body movement detection device. 7. The determination means determines that the adjoining direction of the detected state when going back in time is the direction in which the human body has moved. The human body movement detecting device described in. 8. The determination means detects the non-detection state when the number of adjacent elements in the non-detection state is less than or equal to a predetermined number and the time from the fall to the rise in the element is shorter than a predetermined time. The human body movement detecting device according to any one of claims 1 to 7, wherein 9. An element in the detection state is not in the detection state when an element in the detection state is in the non-detection state before or after at least one unit detection time. 9. The human body movement detection device according to claim 1, wherein the human body movement detection device is determined. 10. The human body movement detecting device according to claim 1, and a passage for measuring the number of persons passing through an area targeted by the infrared array sensor based on a detection result of the human body movement detecting device. An apparatus for detecting the number of passing people, comprising: a means for measuring the number of people. 11. A plurality of infrared array sensors having a plurality of elements arranged in the direction of movement of a person, and for each element of each infrared array sensor, rising and / or standing of an output signal in a predetermined time zone. The signal change detection means for detecting a change in falling, and the appearance states of the detected values of the respective elements of the infrared array sensors between the infrared array sensors, based on a predetermined rule, the plurality of the plurality of A human body movement detection device, comprising: a determination unit that determines movement of a human body in an area targeted by the infrared array sensor. 12. A plurality of infrared array sensors having a plurality of elements arranged in the direction of movement of a person, and for each element of each infrared array sensor, rising and / or standing of an output signal in a predetermined time zone. Signal change detecting means for detecting a downward change, and temporally and spatially judging the detection output result of each infrared array sensor to obtain the transition appearance status of those detection values between each infrared array sensor. A human body movement detection, which comprises a determination means for determining the movement of a human body in an area targeted by the plurality of infrared array sensors based on the transition appearance state by using a predetermined rule. apparatus. 13. The apparatus further comprises another infrared array sensor having a plurality of elements arranged in a direction perpendicular to the moving direction of the person so as to include the detection areas of the plurality of infrared array sensors. 13. The means determines the number of moving persons based on the number of elements in a detection state in the another infrared array sensor.
The human body movement detection device described. 14. The detection area interval between the plurality of infrared sensors is an interval at which one person can be detected at the same time, and further, the background temperature is detected by the infrared array sensor, and based on the detected background temperature. A threshold value setting means for setting a plurality of predetermined threshold values for each sensor, and the signal change detection means uses the threshold values as a reference to detect changes in rising and / or falling of the output signal. Detecting for each threshold, the determining means determines the number of moving persons as one person when the number of the infrared sensors in which the change in the output signal at the predetermined threshold is detected by the signal change detecting means is the predetermined number. The human body movement detecting device according to any one of claims 11 to 13.