JP6343745B2 - Street light system, street light unit, and street light control program - Google Patents

Description

  The present invention relates to a street lamp system, a street lamp unit, and a street lamp control program.

  A huge number of crime prevention lights and street lights are installed on the streets, etc., but even when there are no traffic lights, they remain lit all night long, and power consumption is wasted. There is a case.

  Currently, a huge amount of electricity is consumed by street lights that automatically turn on when dark in the world, but it is turned on even when there are no pedestrians or traffic vehicles. It has become.

  The smart street light system is realized by combining a normal street light, a motion detection sensor, and a short-range communication network, and is turned on in advance when a pedestrian / passenger vehicle appears, and turned off when it is not needed.・ It will fade out.

  For example, in Patent Document 1, the presence or absence of traffic such as a person or a car is confirmed by an object detection sensor installed in or around the streetlight, and the lighting of the streetlight lamp is adjusted according to the situation, and the presence or absence of the traffic. A technique is disclosed in which the above information is also notified to surrounding street lamps and turned on in conjunction with the information so that the lights are turned on before a car or the like arrives in advance.

  Patent Document 2 discloses a technique for easily retrieving information necessary for maintenance work such as the installation location and model of a target street light by linking management data including the coordinates of the street light and map data. Has been.

JP 2011-165573 A JP 2004-1119030 A

  However, in the above-described prior art, lighting control in an overlapping area where areas where street light systems having different coordinate systems are installed is not considered, so lighting control according to the coordinate system can be performed in the overlapping area. There was a problem that it was not possible.

  The present invention has been made in view of such points, and a street lamp system capable of performing lighting control according to the coordinate system in an overlapping area where areas where street lamp systems with different coordinate systems are installed, The object is to provide a street light unit and a street light control program.

In order to solve the above-described problem, the street lamp system according to the first aspect of the present invention stores detection information for detecting a moving object and position information in which the position of the installation location of the sensor unit is defined by at least one coordinate system. A storage unit; a transmission unit that transmits the moving body detection information including the position information to the other unit when the moving body is detected; a sensor unit that illuminates the surroundings; and When receiving the moving object detection information, and receiving the moving object detection information, the position of the sensor unit based on the position information is within a predetermined region in the coordinate system in which the position information is defined A street light unit comprising: a control unit that controls lighting and extinguishing of the lighting unit according to a lighting condition predetermined according to the coordinate system,
The predetermined area is a charge area where the illumination means should be already lit when the moving object is detected, and an area outside the charge area, and the illumination means when the moving object is detected. The control means turns on the illumination means when the moving body detection information is received from the sensor unit arranged in the detection area.

The invention according to claim 2 is characterized in that the control means is based on the moving object detection information received from the sensor unit in the detection area and the moving object detection information received from the sensor unit in the assigned area. A correlation value between the detection of the moving body in step S3 and the detection of the moving body in the assigned area is obtained, and lighting and extinguishing of the illumination means are controlled based on the obtained correlation value.

According to a third aspect of the present invention, the street light unit detects the detection based on the moving object detection information received from the sensor unit in the detection area and the moving object detection information received from the sensor unit in the charge area. Correction means for correcting the area is included.

According to a fourth aspect of the present invention, the street lamp unit includes illuminance detection means for detecting the illuminance of the surroundings, and the control means is based on the illuminance of the surroundings detected by the illuminance detection means. Adjust the brightness of the lighting.

The invention according to claim 5 includes a relay unit including a transfer means for transferring the moving object detection information received from the sensor unit to another unit.

According to a sixth aspect of the present invention, at least one of the sensor unit and the street light unit includes the transfer unit.

According to the seventh aspect of the present invention, a transfer condition including at least one of a transfer effective time, a transferable distance, and the number of transfers is set for each unit including the transfer unit, and the transfer unit sets the transfer condition to the set transfer condition. Based on this, the moving body detection information is transferred to another unit.

According to an eighth aspect of the present invention, at least one of the sensor unit and the street light unit fails based on the moving object detection information received from at least one of the other sensor unit and the other street light unit. And a failure detection means for detecting at least one of the sensor unit, the street light unit, and the relay unit.

According to a ninth aspect of the present invention, at least one of the sensor unit and the street light unit has a photographing unit for photographing the surroundings, and a motion pattern detection for detecting a predetermined motion pattern from a photographed image photographed by the photographing unit. Means and warning means for warning when the predetermined motion pattern is detected.

According to a tenth aspect of the present invention, at least one of the sensor unit, the street light unit, and the relay unit includes log recording means for recording an operation log.

According to an eleventh aspect of the present invention, at least one of the sensor unit and the street light unit includes log recording means for recording an operation log.

  According to the present invention, there is an effect that lighting control according to a coordinate system can be performed in an overlapping region where regions where street light systems having different coordinate systems are installed overlap.

It is a figure which shows the state in which the street lamp system was installed. It is a block diagram which shows schematic structure of a street lamp unit. It is a figure which shows the outline of a street light. It is a block diagram which shows schematic structure of a sensor unit. It is a block diagram which shows schematic structure of a relay unit. It is a figure for demonstrating the area | region where the coordinate system overlapped. It is a flowchart of the process performed by a street lamp unit. It is a flowchart of the process performed with a sensor unit. It is a flowchart of the process performed by a relay unit.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a street lamp system 10 according to the present embodiment. The street light system 10 includes a street light unit 12, a sensor unit 14, and a relay unit 16. In FIG. 1, a plurality of units are arranged along the road 18 as an example, and an ad hoc network that does not require a server, an access point, or the like is constructed. The street light unit 12 has the functions of the sensor unit 14 and the relay unit 16, and the sensor unit 14 has the function of the relay unit 16.

  As shown in FIG. 2, the street light unit 12 includes a controller 20, an LED array 22, a communication module 24, an illuminance sensor 26, a moving object detection sensor 28, and a timer 30. As shown in FIG. 3, the street lamp unit 12 is accommodated in a street lamp 34 attached to the column 32.

  The controller 20 includes a CPU (Central Processing Unit) 20A, a ROM (Read Only Memory) 20B, a RAM (Random Access Memory) 20C, a nonvolatile memory 20D, and an input / output interface (I / O) 20E via a bus 20F. It is a connected configuration. An LED array 22, a communication module 24, an illuminance sensor 26, a moving object detection sensor 28, and a timer 30 are connected to the I / O 20E.

  The LED array 22 is composed of a plurality of LEDs, and can be dimmed to a plurality of levels of brightness by controlling the number of LEDs to be lit, as well as all lighting to turn on all LEDs.

  The communication module 24 is a device for wirelessly communicating with other units. For example, a communication module that employs ZigBee or XBee, which is one of short-range wireless communication standards, can be used. In this case, the communication distance is 10 to 100 m as an example. Further, a communication module using an RFID (Radio Frequency IDentification) tag may be used.

  The illuminance sensor 26 is a sensor that detects the brightness of the place where the street light unit is installed.

  The moving body detection sensor 28 is a sensor that detects a moving object such as a person or a car. As the moving body detection sensor 28, for example, a sensor such as a passive infrared sensor, an ultrasonic sensor, or a laser sensor (a sensor that combines a laser diode and a photodiode) can be used. A sensor is preferred. In addition, passive infrared sensors are inexpensive and widely used. However, in summer when the environmental temperature is close to human body temperature, the sensitivity may become dull. To compensate for this, other sensors such as an ultrasonic sensor are used. May be used in combination.

  The timer 30 includes a clock function that acquires the current time, a measurement function that measures elapsed time, and the like.

  The controller 20 executes a street light control program to be described later. In this embodiment, the street light control program is stored in advance in the nonvolatile memory 20D as an example. The CPU 20A reads and executes the street lamp control program stored in the nonvolatile memory 20D. The street lamp control program stored in the nonvolatile memory 20D can be rewritten via, for example, a magnetic storage device, an optical disk such as a CD-ROM or a DVD-ROM, and the like. Thereby, the street light control algorithm can be easily improved. The street lamp control program may be recorded in the ROM 20C.

  As shown in FIG. 4, the sensor unit 14 includes a controller 40, a communication module 42, a moving object detection sensor 44, and a timer 46. As shown in FIG. 1, the sensor unit 14 is provided on a utility pole, a house entrance, a fence, or the like as needed, in addition to the case where the sensor unit 14 is provided on the side of a road.

  The controller 40 has the same configuration as that of the controller 20 provided in the street light unit 12, and a communication module 42, a moving object detection sensor 44, and a timer 46 are connected to the I / O 40E.

  The communication module 42, the moving object detection sensor 44, and the timer 46 are the same as those provided in the street light unit 12, and thus description thereof is omitted.

  The controller 40 executes a sensor control program described later. The sensor control program is stored in advance in the nonvolatile memory 40D as an example in the present embodiment. The CPU 40A reads and executes the sensor control program stored in the nonvolatile memory 40D. The sensor control program stored in the nonvolatile memory 40D can be rewritten via, for example, a magnetic storage device, an optical disk such as a CD-ROM or a DVD-ROM, and the like. Thereby, the sensor control algorithm can be easily improved. The sensor control program may be recorded in the ROM 40C.

  As illustrated in FIG. 5, the relay unit 16 includes a controller 50, a communication module 52, and a timer 54.

  The controller 50 has the same configuration as the controller 20 provided in the street light unit 12, and a communication module 52 and a timer 54 are connected to the I / O 50E.

  Since the communication module 52 and the timer 54 are the same as those provided in the street lamp unit 12, the description thereof is omitted.

  The controller 50 executes a relay control program to be described later. This relay control program is stored in advance in the nonvolatile memory 50D as an example in the present embodiment. The CPU 50A reads and executes the relay control program stored in the nonvolatile memory 50D. The relay control program stored in the nonvolatile memory 50D can be rewritten via, for example, a magnetic storage device, an optical disk such as a CD-ROM or a DVD-ROM, and the like. Thereby, the relay control algorithm can be easily improved. Further, the relay control program may be recorded in the ROM 50C.

  Each unit of the street light unit 12, the sensor unit 14, and the relay unit 16 is configured such that, for example, at least one of a solar cell, a dry cell, and an AC power source can be used as a power source.

  In the nonvolatile memories 20D, 40D, and 50D of the street light unit 12, the sensor unit 14, and the relay unit 16, position information that indicates the position of the place where each unit is installed is stored in advance.

  The position information is set according to the coordinate system. As an example of the coordinate system, coordinate systems A to C shown below can be used, but the present invention is not limited to this.

(Coordinate system A)
For example, as the coordinate system A, a coordinate system using latitude and longitude on the earth obtained by GPS (Global Positioning System) or the like can be used. In this case, the position information is composed of the following information.
(X1, y1, a)
Here, x1 and y1 are the latitude and longitude on the earth obtained by GPS or the like. a represents two classifications (definitions) as follows, for example.
a = 1: Lighting target (roads, parks, etc.)
a = 2: Not subject to lighting (locations other than subject to lighting, such as roads and parks. For example, in the premises of private houses, outside / inside the entrance, in the premises of apartment buildings, companies, schools, factories, etc.)
In addition to the above two classifications, for example, the following definitions may be added.
a = 3: Apartment house site (outside the building)
a = 4: Inside / outside entrance of apartment house (inside / outside of building)
a = 5: Public space inside the apartment building a = 6: Personal space inside the apartment building

  By finely classifying as described above, more detailed lighting control is possible. In particular, such subdivision is effective when introducing “unique control algorithm based on original coordinate system” for the exterior corridors of apartment buildings.

(Coordinate system B)
As the coordinate system B, a coordinate system using the address as it is can be used. Furthermore, a symbol / numeral for further specifying a place in the same address, or a symbol indicating whether or not it is an illumination target may be added. In this case, the position information is composed of the following information.
(X2, y2, a)
Here, x2 is information representing an address. For example, if the address is “Gunma Prefecture Tenjincho 1-5-1”, it is information represented as “Gunma Prefecture + Tenjincho + 1 + 5 + 1”. Further, y2 is a symbol / number for further specifying a place in the same address, and is determined in advance. Moreover, since a is the same as the coordinate system A, description thereof is omitted.

(Coordinate system C)
Further, as the coordinate system C, an independently defined coordinate system may be used. In this case, the position information is composed of the following information.
(X3, a)
Here, for example, when setting in town A, x3 is information represented by a number assigned to each street in the town, and the position is sequentially numbered from the end. 25 ". In this case, it can mean “25% from one end” as named “12 north-south north and south”. Further, x3 may be information indicating an apartment name or the number of floors of an apartment such as “XX apartment □ floor”, and can be arbitrarily set. Moreover, since a is the same as the coordinate system A, description thereof is omitted.

  Each unit of the street light unit 12, the sensor unit 14, and the relay unit 16 can belong to a plurality of coordinate systems. That a unit belongs to two coordinate systems means that the unit exists in a place where the two coordinate systems overlap. For example, as shown in FIG. 6, the non-volatile memory 20D of the street lamp unit 12 existing in an area where the area 60A defined in the coordinate system A and the area 60B defined in the coordinate system B overlap each other includes a coordinate system. Two pieces of position information, that is, position information defined by A and position information defined by the coordinate system B are stored in advance.

  The nonvolatile memory 20D of the street lamp unit 12 stores charge area information that specifies a predetermined charge area and detection area information that specifies a predetermined detection area. The assigned area information and the detected area information are defined according to the coordinate system of the street lamp unit 12. The assigned area information and the detection area information can also be defined according to a coordinate system that is not the coordinate system of the street lamp unit 12.

  Here, the charge area is an area in which the LED array 22 of the street light unit 12 must be in a lit state when the presence or movement of a moving object such as a person or a vehicle is detected in the area. Is defined as

  In addition, the detection area is set as an area outside the assigned area, and when the presence or movement of a moving object is detected in the area, the LED array 22 of the street lamp unit 12 should start lighting. Defined. Note that the detection area is not limited to the area outside the charge area, but the charge area and the detection area may be complicated, for example, when the detection area is provided like an enclave in the charge area. For example, the coordinate (x, y, a) in the coordinate system A will be described as an example. In this case, the assigned area is limited to a = 1. Even if the values of x and y (latitude and longitude) are almost the same, the position of a = 2 is outside the assigned area. For example, the premises of a house (inside and outside of a building) surrounded by a responsible area composed of roads and the like may be set as detection areas. In this case, when a resident of the house leaves the house, it is possible to automatically turn on the street lamp in the vicinity.

  In addition, each street light unit 12, sensor unit 14, and relay unit 16 is given a unique ID for each coordinate system.

  Next, a communication data set (moving object detection information) communicated between the units will be described. Although details will be described later, the street light unit 12 and the sensor unit 14 transmit a communication data set to other units when a moving object is detected. When the street light unit 12 and the sensor unit 14 receive a communication data set from another unit, the street light unit 12 and the sensor unit 14 transfer the received communication data set to the other unit. When the relay unit 16 receives a communication data set from another unit, the relay unit 16 transfers the received communication data set to the other unit.

  Note that, when transmitting a communication data set to another unit, it is transmitted by broadcast because it is poor in communication efficiency to specify and transmit each unit, but it may be transmitted by multicast. When transmitting by multicast, the transmission destination may be manually set in advance for each unit (set at the time of unit installation or the like) or may be automatically set. In the case of automatic setting, for example, each street light unit transmits broadcast area information and detection area information by broadcast, and whether the sensor unit 14 or relay unit that has received this information includes its position in the charge area or detection area. If it is included, if it is included, all of the street light units can be set as multicast destinations.

Hereinafter, a method for realizing multicast will be specifically described.
When a multicast address is determined in advance, for example, all units including a unit in the detection area and the assigned area are set as multicast targets. That is, all the units that require information generated by a certain unit are subject to multicast. As a specific address, an address is extended so that it can be understood that it is multicast by adding “M” to the unit ID, such as “unit ID-M”. When each unit receives a communication data set addressed to a multicast address, each unit determines whether to transfer the communication data set.

  Moreover, the determination method for each unit can be set manually or automatically. The setting contents are, for example, presence / absence of transfer, direction when transferring, presence / absence of rewriting of the contents of the communication data set, and the like. As an example of a method of automatically setting the setting contents, each street light unit 12 transmits information on its own assigned area and detection area using a communication data set. Each unit that receives the information should transfer or discard the communication data set addressed to “Unit ID-M” for each unit included in the assigned area and the detection area. Is set automatically.

  In addition, each unit can grasp the network structure by obtaining information of a transmission source ID and a transfer source ID from a communication data set that is constantly received. As an example, the adjacent state of a unit having each ID can be grasped from the transmission source ID and the transfer source ID included in the received communication data set. The transfer direction of the communication data set can be determined based on the information on the network structure. Further, the location of the unit included in the multicast address in the network structure can be grasped, and the multicast transfer direction can be determined.

In the present embodiment, the communication data set includes the following information, but the configuration of the communication data set is not limited to this. In addition, the number in [] shown below shows the sequence number of a communication data set.
[0]: Number N of coordinate systems included in the communication data set
[1.1]: Coordinate system ID, coordinate system type [1.2]: Information type [1.3]: Number of transfers: n (number of transfers including this time)
[1.4]: Source ID (ID in coordinate system, position information, transmission time)
Here, the position information is, for example, (x, y, a) in the case of the coordinate system A described above.
[1.5]: Transfer source ID (ID in coordinate system, position information, transfer time)
[1.6]: Transfer source ID (ID in coordinate system, position information, transfer time)
...
[1. (N + 4)]: Transfer source ID (ID in coordinate system, coordinate information, transfer time)
[1.1] to [1. (N + 4)] continues for the number N of coordinate systems.

  It is desirable to use a unique “coordinate system ID”. For example, it is desirable for a certain organization to manage it centrally, such as an Internet domain name. However, an ID that is guaranteed to be probabilistically unique, such as GUID (Globally Unique Identifier), may be assigned to each coordinate system.

The “type of information” is, for example, (I, d) and can be defined as follows, but is not limited thereto.
I: Intensity of detection (example: I = 0: weak motion detection, I = 1: large motion detection)
d: direction (example: d = nnw: north-northeast)

  The “ID in the coordinate system” may be the “name” of the unit in the coordinate system. It is desirable to be unique within the coordinate system.

  The “sending time” is the time when the communication data set is sent (the time when a moving object is detected). The “transfer time” is the time when the communication data set is transferred. The time can be acquired by timers 30, 46, and 54 provided in each unit.

  In principle, communication between units is performed only in the same coordinate system. However, communication in different coordinate systems is also possible. In this case, the ID in each coordinate system may be used as it is. , ID may be converted. It is also possible for each of the street light unit 12, the sensor unit 14, and the relay unit 16 across a plurality of coordinate systems to be transferred to different coordinate systems.

  Next, street light control processing executed by the CPU 20A of the street light unit 12 will be described with reference to the flowchart shown in FIG. The street lamp control process shown in FIG. 7 is executed when the street lamp unit 12 is turned on.

  First, in step 100, it is determined whether or not a communication data set has been received from another unit via the communication module 24. If received, the process proceeds to step 102. If not received, the process proceeds to step 126. .

  In step 102, it is determined whether or not the type of the coordinate system included in the communication data set is the same as the coordinate system of its own unit. If the type is the same, the process proceeds to step 104. Return to. If the own unit belongs to a plurality of coordinate system regions, the process proceeds to step 104 if the unit is the same as one of the coordinate systems. If the coordinate system that is not the same as the coordinate system of its own unit is used in the definition of the assigned area and the detection area, step 102 is not executed and the process proceeds directly from step 100 to step 104.

  In step 104, the position of the transmission source unit represented by the position information of the transmission source ID included in the received communication data set is within the detection area represented by the detection area information stored in the nonvolatile memory 20D. Determine whether or not. When the position of the transmission source unit is within the detection area, the process proceeds to step 106, and when it is outside the detection area, the process proceeds to step 110.

In step 106, it is determined whether or not a lighting condition predetermined for each coordinate system is satisfied.
For example, it is possible to set the lighting condition to be within a certain time (for example, within 5 minutes) from the time when the moving object is detected in the detection area, that is, the transmission time included in the communication data set. If the lighting condition is satisfied, the process proceeds to step 108. If the lighting condition is not satisfied, the process proceeds to step 120.

  In step 108, a lighting time is set for the timer 30, and the LED array 22 is fully lit, for example. The timer 30 notifies the controller 20 when the set lighting time has elapsed.

  A plurality of lighting times can be defined. As an example, the lighting time can be defined according to the communication data set information such as the transmission source ID and transfer source ID of the received communication data set.

  If the lighting time is too long, it consumes power wastefully, and if it is too short, there is a possibility that it will be in a non-lighting state despite the presence of moving objects. Set to time (eg 10 minutes).

  When the unit belongs to a plurality of coordinate system areas, the lighting time is set in advance for each coordinate system, and the lighting time is set according to the type of the coordinate system included in the communication data set. The same applies to the setting of the lighting time described later. Thus, since lighting time can be set according to a coordinate system, lighting control can be appropriately performed according to a coordinate system.

  On the other hand, in step 110, the position of the transmission source unit represented by the position information of the transmission source ID included in the communication data set received in step 100 is represented by the assigned area information stored in the nonvolatile memory 20D. It is determined whether it is in the area in charge. If the position of the transmission source unit is within the assigned area, the process proceeds to step 112, and if not, the process proceeds to step 120.

  In step 112, it is determined whether or not the LED array 22 is already lit. If it is already lit, the process proceeds to step 114. If it is not lit, the process proceeds to step 116. If it is determined in step 112 that the LED array 22 has been turned off without being turned off in step 134 described later, the process proceeds to step 116.

  In step 114, since the LED array 22 is already lit, the lighting time (for example, 5 minutes) is reset for the timer 30. Thereby, while the moving body is detected in the assigned area, the lighting time is reset each time, and the lighting state is continued.

  On the other hand, in step 116, the LED array 22 is fully lit, for example. By the way, since the detection area is set outside the assigned area, the moving object should normally be detected in the assigned area after the moving object is detected in the detected area. Therefore, if it is determined that the area is not the detection area in Step 104 and the area is the charge area in Step 110, and if it is determined that the lighting area is not turned on in Step 112, the units in the detection area (including the relay unit 16 are also included). ) Is considered to have failed.

  Accordingly, in step 118, predetermined error processing is executed, and error information including the time when the error has occurred is stored in the nonvolatile memory 20D as log information. In this error processing, for example, the lighting time is not set for the timer 30 (the lighting is kept on) or the lighting time is set to a long time (for example, one week). This is to avoid a situation where the street light is not lit. In this case, the lighting may be reduced to about 30% instead of being fully lit.

  In addition, when an error occurs, if there is a unit in a predetermined area outside the detection area and close to the detection area, and there is a unit that detects a moving object and transmits a communication data set, The detection area information may be changed so that the position of the unit is also included in the detection area. As a result, the detection area is enlarged, but it is desirable to set an enlargement allowable range in advance so as not to enlarge too much.

  Further, when an error has not occurred for a predetermined time since the last occurrence of the error, the normal control may be restored.

  In addition, for each street light unit, the current operating state, for example, whether an error has not occurred and is operating under normal control, or whether an error has occurred and is operating based on error handling, etc. May be displayed by an indicator such as an LED having good visibility from the road, for example.

  Also, if an error continues to occur for a certain period (for example, one month or more) and the normal operation cannot be performed, a special display indicating that a failure has occurred is displayed on the indicator, or it is lit. The state may be changed (for example, a weak blinking state). Thereby, it is possible to promptly recognize a failure / failure.

  In step 120, it is determined whether or not a predetermined transfer condition is satisfied according to the coordinate system. If the transfer condition is satisfied, the process proceeds to step 122. If the transfer condition is not satisfied, the process proceeds to step 124. Here, as an example when the transfer condition is satisfied, for example, the number of transfers included in the communication data set is less than or equal to a predetermined upper limit value, the transfer distance is less than or equal to a predetermined upper limit value, For example, the elapsed time is less than or equal to a predetermined upper limit, and the transfer source ID included in the communication data set does not include its own ID. If the coordinate system is a coordinate system using latitude / longitude, the transfer distance can be calculated based on the location information of the transmission source ID and the location information of itself included in the communication data set. Further, the elapsed time from the moving object detection can be calculated from the transmission time of the transmission source and the current time included in the communication data set.

  The transfer conditions are not limited to being stored in each unit, and the transmission source unit or the relay source unit may add the subsequent transfer conditions to the communication data set for transmission.

  In step 122, the communication data set received in step 100 is transferred to another unit. In this case, if the communication data set includes information on a unit of a coordinate system different from the coordinate system of its own unit, this information may be deleted and transferred. For example, a transfer source ID different from the coordinate system of its own unit is deleted from the list of transfer source IDs included in the communication data set. If necessary, the communication data set may be transferred to a unit of a different coordinate system. In this case, the received communication data set may be transferred as it is, or information in a different coordinate system may be converted into information corresponding to the coordinate system of the transfer destination unit and transferred.

  As described above, since the communication data set is not transferred when the transfer condition is not satisfied, unnecessary information can be prevented from being transmitted unnecessarily, and unnecessary load on the network can be prevented.

  In step 124, the reception time of the communication data set, the contents of the communication data set, and the lighting state (lighting time, etc.) are stored in the nonvolatile memory 20D as log information.

  In step 126, it is determined whether or not a moving object is detected by the moving object detection sensor 28. If a moving object is detected, the process proceeds to step 128. If a moving object is not detected, the process proceeds to step 132.

  In step 128, similarly to step 108, a lighting time is set for the timer 30, and the LED array 22 is fully lit, for example.

  In step 130, a communication data set is generated and transmitted to other units. Similarly to step 124, the reception time of the communication data set, the content of the communication data set, the lighting state, and the like are used as log information in the nonvolatile memory 20D. Remember me.

  The transmission of the communication data set may be executed after a certain time has elapsed after the previous transmission. Thereby, the communication amount can be reduced. For example, even when moving object detection continues for a short time interval, by setting the transmission interval to 1 minute or longer, it is possible to prevent excessive transmission of communication data sets, that is, flooding of communication information on the network. .

  In step 132, it is determined whether or not the timer 30 has notified that the set lighting time has ended. If it is notified that the lighting time has ended, the process proceeds to step 134, and the lighting time has ended. If not notified, the process proceeds to step 100.

  In step 134, the LED array 22 is turned off. Instead of turning off all the LEDs in the LED array 22, only some of the LEDs may be turned on and the other LEDs may be turned off to reduce the light. Thereby, it is possible to prevent the street light from being turned off when the moving object cannot be detected even though the moving object exists.

  In addition to the setting of the lighting time, the processing of each step described above can be different processing for each coordinate system. Thereby, appropriate lighting control can be performed for each coordinate system.

  Next, sensor control processing executed by the CPU 40A of the sensor unit 14 will be described with reference to the flowchart shown in FIG. The sensor control process shown in FIG. 8 is executed when the sensor unit 14 is turned on.

  Step 200 is the same process as step 100 of FIG. Steps 202 to 208 are the same processes as steps 120 to 126 in FIG. Step 210 is the same processing as step 130 of FIG.

  Note that an illuminance sensor may be provided in the sensor unit 14 and the process shown in FIG. 8 may be executed only when the illuminance sensor detects that the surrounding is dark. Thereby, it is possible to prevent unnecessary communication from being performed in the daytime when the surroundings are bright.

  Next, relay control processing executed by the CPU 50A of the relay unit 16 will be described with reference to the flowchart shown in FIG. The relay control process shown in FIG. 9 is executed when the relay unit 16 is powered on.

  Step 300 is the same processing as step 100 of FIG. Steps 302 to 306 are the same as steps 120 to 124 in FIG.

  As described above, in this embodiment, the street lamp unit 12 can be controlled to be lit under lighting conditions corresponding to the coordinate system. For this reason, the units arranged in the overlapping area where the area where the street light system is installed overlap can operate based on the operating conditions set in each coordinate system, so in the area where the coordinate systems overlap It is possible to flexibly cope with lighting control, and for example, it becomes easy to introduce a street light system in a town unit.

  In the present embodiment, the presence or absence of a moving object such as a person or a vehicle is detected by a moving object detection sensor provided in the street light unit 12 or the sensor unit 14, and based on the detection result, the movement destination of the person or the car is detected in advance. The LED array 22 is controlled to be turned on. Thus, when the LED array 22 is not lit when not necessary, it can be shown to a person, a car, or the like as if the LED array 22 is always lit.

  In the present embodiment, the street lamp unit 12 lights the LED array 22 when the sensor unit 14 existing in the detection area detects a moving object. However, the detected moving object always exists in the assigned area. In some cases, lighting is wasted.

  Therefore, instead of turning on only when a moving object is detected by the single sensor unit 14, for example, based on past log information, the detection history of the moving object in the sensor unit 14 in the detection area and the sensor unit 14 in the assigned area Based on the detection history of the moving object, a correlation value between the detection of the moving object in the detection region and the detection of the moving object in the assigned region is obtained, and it is determined whether or not the LED array 22 is lit based on the obtained correlation value. May be.

  For example, for each of the sensor units 14 in the detection area, the ratio of the detection of the moving object by the sensor unit 14 and the street lamp unit 12 in the assigned area within a predetermined time after the moving object is detected is obtained as the correlation value. If the correlation value is equal to or less than a predetermined threshold value, it is determined that the moving unit is not likely to be detected in the assigned region even if the moving unit is detected by the sensor unit 14, and the LED array 22 is not lit or turned off. And turn it on. Thereby, useless lighting can be prevented.

  In addition, as described above, when a moving object is detected by the sensor unit 14 in the assigned area after the LED array 22 is not lit or reduced even if a moving object is detected by the sensor unit 14 having a correlation value equal to or less than the threshold value, It is considered that the determination that the LED array 22 was not turned on or turned off was an error. In this case, the correlation value may be calculated again.

  Further, the street light unit 12 is always required to be lit whenever a moving object is present in the assigned area, but in order to realize this purpose, only the sensor unit 14 having a high correlation value is used. Even if it is not enough. For example, the sensor unit 14 with a very low correlation value is not suitable as a lighting condition, but only when the sensor unit 14 with a high correlation value does not detect a moving object and the sensor unit 14 with a low correlation value detects When a moving object is detected in the assigned area, the LED array 22 may be turned on also when the sensor unit 14 having a low correlation value detects the moving object. Further, when there are a plurality of sensor units 14 having the same correlation value, priority may be given to the sensor unit 14 closer to the assigned area, and it may be determined whether or not the LED array 22 is lit.

In addition, the detection area may be set wider by default (initial condition), and the detection area may be corrected so as to be the minimum necessary area based on the log information. For example, before the moving object detected in the assigned area enters the assigned area, the unit that detected the moving object in the detected area is estimated based on the log information. When there are a plurality of estimated units, a distant unit that can be safely ignored is identified, and the identified unit is removed from the detection area. Specifically, the coordinates of the specified unit are excluded from the detection area, the ID of the specified unit is registered in the exclusion list, and the communication data set from the unit of the ID registered in the exclusion list is ignored. do it. As a result, the size of the detection area can be made as small as necessary.

  In addition, since a sensor that detects a moving object excessively compared with surrounding units is likely to be broken, such a unit may also be excluded from the detection area and the assigned area. Furthermore, units that transfer communication data sets excessively compared to surrounding units may also be excluded from the assigned area or detection area.

In addition, the street light unit 12 controls lighting based on the brightness detected by the illuminance sensor 26 in the time zone in which movements of people, cars, etc. are frequently observed, in the same manner as a normal street light. Also good. For example, in a quiet residential area, when the street light unit 12 detects that the surroundings are dark by the illuminance sensor 26 in the time zone from dusk to around 8:00 pm, as in the case of a normal street light. The LED array 22 may be turned on. The time zone setting may be adjusted based on the analysis result of the log information, or may be given as a setting condition from the outside.

  Further, for example, when there is something that emits a large amount of light around each street light unit 12, such as a convenience store, a restaurant, a pachinko parlor, a private house gate, etc., the street light unit 12 itself is dimmed and unnecessary. You may make it suppress energy consumption. This will be specifically described below.

  First, the illuminance sensor 26 includes a sensibility illuminance sensor capable of measuring the brightness of a road directly under the street lamp unit 12. Further, as the LED array 22, an LED array capable of adjusting the light amount at high speed is used.

  Then, the light amount of the LED array 22 is periodically reduced by about 10 to 20% and the response time of the illuminance sensor 26 is decreased, and the amount of change in the light amount on the road surface by the illuminance sensor 26 is measured. Based on the result, the contribution ratio between the contribution of the maximum light amount emitted by the LED array 22 and the contribution from the external light source to the illuminance on the road surface is calculated. Then, the light intensity of the LED array 22 is reduced so that the illuminance detected by the illuminance sensor 26 becomes equal to the illuminance of the road surface only by the maximum light intensity emitted by the LED array 22.

  Further, when it is determined that the illuminance detected by the illuminance sensor 26 is less than or equal to a predetermined threshold value indicating insufficient illuminance during light reduction, the light amount of the LED array 22 is immediately increased as much as necessary. Good.

  In addition, when the amount of light from the external light source is sufficiently large and the light emission of the LED array 22 is reduced, it is desirable to gradually carry out over a long period of time. For example, when it is determined that 50% of the light amount of the LED array 22 is extra, first, the light is reduced by 10% over several minutes. Therefore, the contribution ratio is calculated in the same manner as described above, and the light amount of the LED array 22 is reduced. By gradually dimming in this way, hunting between street lights can be prevented.

  Also, a camera is provided in the street light unit 12, and the type of moving object, the speed of movement, the direction, and the like are estimated by image processing based on the captured image captured by the camera, and lighting control is performed based on the estimated information. May be. For example, when a specific movement pattern (for example, a suspicious person's movement) is detected from a photographed image, a warning is issued by changing the lighting state by blinking the LED array 22 or generating a warning sound. May be. Thereby, it becomes possible to make the residents in the vicinity recognize the presence of the suspicious person.

  Moreover, as a street light with a camera for lighting control based only on the brightness detected by the illuminance sensor, an “e warning light” or the like in which two so-called “e warning cameras” are incorporated in an LED street light is commercially available. The controller 12 (CPU) of the street light unit 12 may be used in common with a controller that performs camera control, image file encryption, and the like in e-warning lights, and further adds the above-described image processing function.

  Further, the times acquired by the timers of the street lamp unit 12, the sensor unit 14, and the relay unit 16 need to match. As a method for adjusting the time of this clock, for example, there is a method in which some units are equipped with a function capable of receiving accurate time information from the outside such as a radio clock, the Internet, etc., and the time of other units is adjusted to this. . Also, when transmitting or relaying a communication data set from a unit equipped with a radio clock, add a description that the information on the transmission time and relay time is based on the radio clock, so that other units However, the time may be adjusted to this.

  Alternatively, the position information of the moving object may be received by receiving the position information of the moving object from the person / vehicle, and the lighting control may be performed based on the position. For example, position information transmitted from a mobile phone with a GPS function may be used.

  In this embodiment, the log information is stored in the nonvolatile memory. However, the log information may be recorded on an optical disk such as a magnetic recording device or a CD-ROM. In this case, a magnetic recording device and an optical disk recording device are provided in each unit. The log information stored in each unit may be acquired by wireless communication from a personal computer or a tablet terminal. A log information management server may be installed to centrally manage log information.

  Further, the LED array 22 may be turned on when a lighting request is received from a smartphone (pedestrian or the like) or a car navigation system (car or the like) that has been previously authorized and authenticated. As a result, a more reliable and lean lighting operation is possible. For example, a smartphone or a car navigation system makes a lighting request by determining its own moving direction from the acquired GPS information or the like. Specifically, as the timing for requesting lighting, for example, (1) When a pedestrian or a car is continuously moving for a predetermined distance (for example, 10 m for a pedestrian, 100 m for a car) or more. (2) A distance greater than or equal to a predetermined distance is continuously greater than or equal to a predetermined speed (for example, 1 km / h for a pedestrian, 20 km / h for a car) and continuously for a predetermined time (for example, 10 seconds) There are cases where it is moving.

  The possibility of malfunction can be reduced by lighting the LED array 22 only when such a lighting request is received. In particular, it is possible to prevent a signal from outside the detection area such as inside the house from being erroneously determined as a signal from the detection area outside the house.

  In addition, an ID for identifying these devices, device position information, and the like may be transmitted from a smartphone or a car navigation system, and each unit may include the received information in a communication data set. Thereby, the moving direction of a smart phone, a car navigation system, etc. can be specified more reliably. In this case, each unit determines whether or not to turn on the LED array 22 or whether or not to transfer a communication data set based on the moving direction. For example, when the moving direction is away, it is possible to perform control such as not lighting the LED array 22 or not transferring the communication data set. In this way, useless lighting can be prevented by determining whether to turn on the LED array 22 or determining whether to transfer the communication data set based on the moving direction.

  Further, when an error such as a lighting error occurs, a report of the error information may be created, and the error report may be transmitted automatically or manually. As a result, more reliable and lean lighting control can be realized. In the case of a smartphone, it can be transmitted to a predetermined destination by e-mail or the like. When the car navigation system cannot connect to the Internet, an error report file can be stored in a memory card or transferred to a smartphone or the like by wireless communication using ZigBee or Bluetooth.

Moreover, not only smartphones and car navigation systems but also pedestrians and vehicles have portable units and in-vehicle units that include the functions of the relay unit 16, enabling more reliable and lean lighting control. In addition to the function of the relay unit 16, the portable unit and the in-vehicle unit desirably incorporate a GPS function, and further desirably have the above-described lighting request function, ID transmission function, error information creation function, and the like.

DESCRIPTION OF SYMBOLS 10 Street lamp system 12 Street lamp unit 14 Sensor unit 16 Relay unit 20, 40, 50 Controller 22 LED array 24, 42, 52 Communication module 26 Illuminance sensor 28 Moving object detection sensor 30, 46, 54 Timer

Claims (11)

Detection means for detecting a moving object, storage means for storing position information in which the position of the installation location of the sensor unit is defined in at least one coordinate system, and moving object detection including the position information when the moving object is detected A transmission unit for transmitting information to another unit; and a sensor unit including:
  Illuminating means for illuminating the surroundings, receiving means for receiving the moving object detection information from the sensor unit, and when the moving object detection information is received, the position of the sensor unit based on the position information is defined by the position information A street light unit comprising: a control unit that controls lighting and extinguishing of the lighting unit according to a lighting condition that is predetermined according to the coordinate system in a predetermined region in the coordinate system;
A street light system including
  The predetermined area is a charge area where the illumination means should be already lit when the moving object is detected, and an area outside the charge area, and the illumination means when the moving object is detected. And a detection area to start lighting,
  The control means turns on the illumination means when the moving body detection information is received from the sensor unit arranged in the detection area.
Street light system. The control means detects the moving object in the detection region and the responsible person based on the moving object detection information received from the sensor unit in the detection area and the moving object detection information received from the sensor unit in the responsible area. The street light system according to claim 1, wherein a correlation value with detection of the moving object in a region is obtained, and lighting and extinguishing of the lighting unit are controlled based on the obtained correlation value. The street light unit includes correction means for correcting the detection area based on the moving object detection information received from the sensor unit in the detection area and the moving object detection information received from the sensor unit in the assigned area. The street lamp system according to claim 1 or 2. The street light unit includes illuminance detection means for detecting the ambient illuminance, and the control means adjusts the brightness of the illumination by the illumination means based on the ambient illuminance detected by the illuminance detection means. The street lamp system according to any one of claims 1 to 3. The street lamp system according to any one of claims 1 to 4, further comprising: a relay unit including a transfer unit that transfers the moving object detection information received from the sensor unit to another unit.   The street light system according to claim 5, wherein at least one of the sensor unit and the street light unit includes the transfer unit. For each unit including the transfer means, a transfer condition including at least one of a transfer effective time, a transferable distance, and the number of transfers is set,
The street light system according to claim 5 or 6, wherein the transfer means transfers the moving object detection information to another unit based on a set transfer condition. At least one of the sensor unit and the street lamp unit is based on the moving object detection information received from at least one of the other sensor unit and the other street lamp unit, a sensor unit that is out of order, a street lamp unit, And a failure detection means for detecting at least one of the relay units. At least one of the sensor unit and the street light unit is
Photographing means for photographing the surroundings;
A motion pattern detecting means for detecting a predetermined motion pattern from a photographed image photographed by the photographing means;
Warning means for warning when the predetermined movement pattern is detected;
The street lamp system according to claim 1, comprising: Log recording means for recording an operation log of at least one of the sensor unit, the street light unit, and the relay unit
The street light system of Claim 5 or Claim 8 containing this. Log recording means for recording an operation log of at least one of the sensor unit and the street light unit
The street lamp system according to claim 6, claim 7, or claim 9.

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