JP6289291B2 - Elevator apparatus and elevator stop position determination method - Google Patents

Description

  The present invention uses an existing photoelectric sensor used to determine whether there is a passenger at a landing, and determines whether the car has stopped in a door zone where the door of the car and the landing door can be opened. The present invention relates to an elevator apparatus and a method for determining an elevator stop position.

  As an elevator apparatus for determining whether or not the car is stopped in a door zone where the car door and the landing door can be opened, there are the following conventional techniques. This conventional elevator device is attached to one end of a car door sill, emits light within a predetermined operating range toward the side of the car room, and operates as a photoelectric landing detector that operates when receiving light. A landing detection member that is attached to one end of the landing door sill and reflects the light emitted from the landing detector toward the landing detector (see, for example, Patent Document 1). .

JP 2004-224529 A

However, the prior art has the following problems.
In such a conventional system, it is necessary to attach a dedicated detector for detecting whether the stop position of the car is in the door zone. Therefore, there is a problem that the production takes time and the production cost increases.

  The present invention has been made in order to solve the above-described problems, and an elevator apparatus and an elevator that can accurately detect that the car has stopped at the door zone while suppressing an increase in manufacturing cost. The objective is to obtain a stop position determination method.

  An elevator apparatus according to the present invention is installed above a car door, measures the amount of reflected light irradiated in the landing direction, and outputs a control signal that becomes an on / off pattern using a preset threshold value; and In an elevator apparatus comprising a control signal processing unit for determining presence / absence of passengers at a landing based on a control signal output from a photoelectric sensor with the car door and the landing door open. Has a horizontal band pattern at a predetermined interval in the direction perpendicular to the car ascending / descending direction on the surface facing the car door, and the control signal processor is moving before the car arrives at the landing From when the door is opened to the position where the door can be opened, the belt pattern is recognized based on the control signal output from the photoelectric sensor. The car stops By identifying whether, is to determine whether the car has stopped in the door zone that can open the door of the car door and landing.

  In addition, the elevator stop position determination method according to the present invention measures the amount of reflected light that is installed above the car door, illuminates in the landing direction, and generates a control signal that becomes an on / off pattern using a preset threshold value. Elevator apparatus comprising a photoelectric sensor for output, and a control signal processing unit that determines whether there is a passenger on the landing based on a control signal output from the photoelectric sensor in a state where the car door and the landing door are opened An elevator stop position determination method for determining whether or not a car has stopped in a door zone where the door of the car and the landing door can be opened by applying a photoelectric sensor. , In the direction perpendicular to the car's up-and-down direction on the surface facing the door of the car of the landing door from the time the car is moving before it arrives at the landing until it enters the position where the door can be opened Based on the first step of acquiring from the photoelectric sensor a control signal corresponding to the amount of reflected light emitted from the photoelectric sensor with respect to the horizontal strip pattern, and the on / off pattern of the control signal acquired in the first step, Counts the number of edge detections when the on / off pattern changes from the off state to the on state, and if the counted number of edge detections is less than a predetermined value at the door opening request timing, the car stops in the door zone. And a second step of determining that it has been performed.

  According to the present invention, an existing photoelectric sensor used to determine whether there is a passenger at a landing is diverted, and a strip-shaped on / off pattern provided on the landing door on the surface facing the door of the car is Detects and determines whether the stop position of the car is appropriate based on the detection result, so that it is possible to detect with high accuracy that the car has stopped in the door zone while suppressing an increase in manufacturing cost. An elevator apparatus and an elevator stop position determination method that can be performed can be obtained.

It is explanatory drawing which shows the outline of the entrance / exit of the elevator apparatus in Embodiment 1 of this invention. It is explanatory drawing which shows the main structures of the elevator apparatus in Embodiment 1 of this invention. It is the figure which showed the detailed pattern of the horizontal strip | belt-shaped pattern 13 in Embodiment 1 of this invention. It is a flowchart of a series of operations executed by the control signal processing unit of the elevator apparatus according to Embodiment 1 of the present invention.

  Hereinafter, preferred embodiments of an elevator apparatus and an elevator stop position determination method of the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
FIG. 1 is an explanatory diagram showing an outline of an entrance / exit of an elevator apparatus according to Embodiment 1 of the present invention. Moreover, FIG. 2 is explanatory drawing which shows the main structures of the elevator apparatus in Embodiment 1 of this invention.

  A car doorway is provided in the car that moves up and down in the hoistway. In addition, a landing entrance is provided at each landing on the floor where the car that is raised and lowered in the hoistway stops. The landing doorway is opened and closed by a landing door 12 that is moved horizontally via a landing door opening / closing mechanism 11.

  On the other hand, the car doorway is opened and closed by a car door 22 that is moved horizontally via a car door drive device 21. Here, although not shown in detail, the landing door is slid horizontally in conjunction with the opening and closing of the car door on the floor where the car arrived.

  As shown in FIG. 2, above the car door 22, when the car door 22 and the landing door 12 are opened, the reflected light amount emitted toward the landing direction is measured to thereby determine the landing The photoelectric sensor 31 for detecting the presence / absence of passengers is mounted.

  As an example of a specific configuration, the photoelectric sensor 31 includes a light projecting unit that mounts a light emitting diode that emits infrared light, and infrared light emitted from an object to be detected such as passengers at a landing and reflected. And a light receiving portion on which a photodiode for receiving the reflected light returning is mounted.

  Although not shown in detail, the light emitted from the light projecting unit is emitted from the light emission window provided in the outer shell of the photoelectric sensor 31, and the light incident on the photodiode is emitted from the outer shell of the photoelectric sensor 31. The light is incident through a light incident window provided in. In addition, in order to eliminate the influence by disturbance light other than infrared light, it is desirable that the light entrance window has a function of an optical filter for passing only the wavelength component of the light emitted from the light projecting unit. .

  A photoelectric sensor 31 incorporating a light emitting diode and a photodiode is installed with an inclination with respect to the floor surface from above the car door 22 toward the floor surface of the landing. The light receiving unit constantly monitors the amount of reflected light of the light emitted from the light projecting unit, and determines that the detection body is present by receiving the amount of reflected light that exceeds a predetermined threshold. A control signal that can be output.

  The amount of light emitted from the light projecting unit is controlled according to the amount of reflected light received by the light receiving unit, so that the amount of reflected light is controlled not to be excessive or small. As a result, an appropriate threshold process necessary for determining the presence of the detected object is performed. When the presence of the detection target is determined, a control signal is output from the photoelectric sensor 31, and when it is not determined, no control signal is output.

  As shown in FIG. 1, the landing doors 12 on each floor of the elevator apparatus are provided with a horizontal belt-like pattern 13 on the surface facing the car door 22 of the door 12 of each landing. The belt-like pattern 13 is provided at a position where the light emitted from the photoelectric sensor 31 can be reflected as shown in FIG. 2 when the car door 22 and the landing door 12 are closed. A plurality of horizontal patterns are formed at intervals.

  In addition, such a strip | belt-shaped pattern 13 is comprised from the material which can make the light from the photoelectric sensor 31 reflect high or low by the irradiation position. For example, the horizontal strip pattern 13 is formed using a paint having a high reflectance and a paint having a low reflectance. Moreover, since the photoelectric sensor 31 needs to be able to detect the change in the amount of reflected light, the horizontal strip pattern 13 is formed at an appropriate height in the ascending / descending direction according to the ascending / descending speed of the car.

  Next, a method for determining a change in the amount of reflected light of the light irradiated on the horizontal belt-like pattern based on the control signal acquired from the photoelectric sensor 31 by the control signal processing unit 41 will be described in detail. Reflectance of the light emitted from the photoelectric sensor 31 by the horizontal belt-like pattern 13 changes as the car moves up and down. For this reason, the difference between the threshold value preset in the photoelectric sensor 31 and the amount of reflected light at each change is compared. As a result of this comparison, when the amount of reflected light exceeds the threshold value, the photoelectric sensor 31 outputs a control signal as an on state, assuming that a change has been detected.

  Next, the control signal processing unit 41 recognizes a belt-like pattern from the control signal output from the photoelectric sensor 31 and recognizes a door zone corresponding to an area where the car door 22 and the landing door 12 can be opened. The method of performing will be described in detail. The control signal obtained during the raising / lowering of the car from the photoelectric sensor 31 is regularly performed at a timing corresponding to the height of the horizontal band pattern when passing through the boundary between the high reflectance and the low reflectance material in the band pattern 13. Is output.

  On the other hand, when the car passes through a place where the irradiation destination of the photoelectric sensor 31 is not the belt-like pattern 13, a control signal is not output or an irregular control signal according to the unevenness of the hoistway wall surface is output. For this reason, when the control signal processing unit 41 observes the control signal output from the photoelectric sensor 31, the on / off pattern of the read control signal is a pattern corresponding to the belt-like pattern formed to detect the door zone. It is necessary to compare whether they match.

  In the ON / OFF pattern of the control signal output from the photoelectric sensor 31, the interval of the edge (rising) signal increases or decreases in proportion to the raising / lowering speed of the car. For this reason, the control signal processing unit 41 that has read the control signal from the photoelectric sensor 31 also reads the elevator lifting / lowering speed signal that can be acquired from an encoder or the like installed in the hoisting machine of the elevator apparatus, and the speed is calculated from each signal. Depending on the pattern identification.

  The on / off pattern of the control signal output from the photoelectric sensor 31 corresponding to the strip pattern 13 is determined when the car passes through the landing (at high speed) or arrives (at low speed) during the initial adjustment of the elevator apparatus. A method may be used in which data is experimentally acquired in accordance with the actual speed immediately before landing and stored in advance as learned data, and the pattern acquired during actual operation is matched with the learning result for identification.

  Next, a specific example of the horizontal strip pattern 13 will be described with reference to FIG. FIG. 3 is a diagram showing a detailed pattern of the horizontal belt-like pattern 13 in the first embodiment of the present invention. As shown in FIG. 3, the horizontal strip pattern 13 in the first embodiment is composed of two types of a pair of determination pattern rows 13a and 13c and a zone identification pattern row 13b.

  Here, the zone identification pattern row 13b defines an actual door zone. On the other hand, the pair of discriminating pattern rows 13a and 13c are arranged line-symmetrically above and below the zone discriminating pattern row 13b so that each pattern row is asymmetric with respect to the ascending / descending direction of the car. It is formed as follows. The reason why the pair of discrimination pattern rows 13a and 13c are arranged so as to sandwich the zone identification pattern row 13b in this way is that the pair of discrimination pattern rows 13a and 13c discriminate the presence of the strip pattern 13. This is because it is necessary to discriminate before the zone identification pattern row 13b regardless of the direction in which the car is raised or lowered.

Furthermore, the reason why the pair of discrimination pattern rows 13a and 13c are arranged as a pattern as shown in FIG. 4 is due to the following two reasons.
(Reason 1) When the car descends, the determination pattern row 13a is recognized before the identification pattern row 13b. At this time, the photoelectric sensor 31 scans the discrimination pattern row 13a from the upper side to the lower side to output a control signal. On the other hand, when the car rises, the determination pattern row 13c is recognized before the identification pattern row 13b. At this time, the photoelectric sensor 31 scans the discrimination pattern row 13c from the lower side to the upper side, and outputs a control signal. Therefore, the control signal (edge signal pattern) obtained from the discrimination pattern row 13a when the car is lowered and the control signal (edge signal pattern) obtained from the discrimination pattern row 13c when the car is raised are the same pattern. The pair of discrimination pattern rows 13a and 13c are arranged symmetrically in the vertical direction.

(Reason 2) When the car has moved in a direction away from the identification pattern row 13b from a state in which the cage already exists between the pair of discrimination pattern rows 13a and 13c, the door zone can be opened. Scanning by the photoelectric sensor 31 is performed in the direction opposite to that when the car enters. Therefore, the pair of determination pattern rows 13a and 13c are ignorable patterns so that the door zone is not re-determined when the car moves in the direction opposite to that when entering the door zone that can be opened. Must be configured. That is, the upper and lower two discrimination pattern rows 13 a and 13 c in one door zone need to be configured to recognize only one direction in scanning by the photoelectric sensor 31. Therefore, each of the pair of determination pattern rows 13a and 13c is formed to be asymmetric with respect to the raising / lowering direction of the car.

  The pair of determination pattern rows 13a and 13c and the zone identification pattern row 13b must be regularly defined in advance so that the control signal processing unit 41 can identify them. However, it is not necessarily the same pattern in all the stop floors, for example, it can be a unique pattern for each floor, in this case, a horizontal belt-like pattern uniquely provided for each floor, It can also be used for floor identification.

  Further, as shown in FIG. 3, the zone identification pattern row 13b can form a horizontal strip pattern at a finer interval than the pair of discrimination pattern rows 13a and 13c, and by making the interval finer. The door zone detection accuracy can be improved.

  In detecting the strip pattern based on the control signal from the photoelectric sensor 31, the control signal processing unit 41 first matches the discrimination pattern row 13 a (when the car is lowered) or the discrimination pattern row 13 c (when the car is raised). . When the matching fails, the control signal processing unit 41 determines that the control signal output from the photoelectric sensor 31 does not correspond to the strip pattern 13 and ignores it.

  On the other hand, if the matching is successful, the control signal processing unit 41 next performs edge detection of the zone identification pattern row 13b. Here, the door zone, which is an area where the car door 22 and the landing door 12 can be opened, is defined in advance from the first edge detection position with respect to the zone identification pattern row 13b after successful matching of the discrimination pattern row 13a. The range from the edge detection position corresponding to the number of detected edges to a position before the edge detection position is set as the range.

  Therefore, the control signal processing unit 41 can determine that the car is stopped in the door zone when at least the first edge position is detected and there is a door opening request with less than the defined number of edges. . On the other hand, when the number of edge detections reaches the defined number of edges, the control signal processing unit 41 can determine that the car passes through the door zone and is outside the door zone.

  When the control signal processing unit 41 determines that the car has stopped with less than the defined number of edges, the number of edge detections and the floor obtained from the discrimination pattern row 13a or the discrimination pattern row 13c are used. The unique information is stored in a nonvolatile storage device (for example, a flash ROM). By performing such storage processing, the control signal processing unit 41 can prevent the elevator car from resuming after a power failure even when power supply to the elevator apparatus is stopped while the car is stopped on the floor. It is possible to confirm in which floor door zone the vehicle stopped and immediately return to normal operation.

  Next, a series of operations of the elevator apparatus according to the present invention will be described in detail using a flowchart. FIG. 4 is a flowchart of a series of operations executed by the control signal processing unit 41 of the elevator apparatus according to Embodiment 1 of the present invention. Regardless of the state of the elevator, the control signal processing unit 41 constantly monitors the change in the amount of reflected light from the photoelectric sensor 31 and operates according to the following flowchart.

  First, in step S0, the control signal processing unit 41 monitors and processes the control signal acquired from the photoelectric sensor 31 when the car is moving up and down as a signal in the door zone detection mode. Specifically, the control signal processing unit 41 monitors the raising / lowering speed signal of the car together with the control signal from the photoelectric sensor 31.

  Next, in step S <b> 1, the control signal processing unit 41 confirms the output (rise) of the control signal from the photoelectric sensor 31, and then determines whether or not the on / off pattern of the control signal is due to the belt-like pattern 13. Perform pattern matching processing.

  When the control signal processing unit 41 determines in step S1 that the on / off pattern of the control signal does not match the determination pattern row 13a or the determination pattern row 13c of the strip pattern 13, the process returns to step S0.

  On the other hand, if the control signal processing unit 41 determines in step S1 that the on / off pattern of the control signal matches the discrimination pattern row 13a or the discrimination pattern row 13c of the belt-like pattern 13, the zone identification pattern row In order to identify the door zone by 13b, the process proceeds to step S2 and subsequent steps.

  In step S2, the control signal processor 41 proceeds to step S3 by detecting the edge of the control signal output from the photoelectric sensor 31 corresponding to the zone identification pattern row 13b one or more times.

  Next, in step S3, the control signal processing unit 41 monitors whether or not the number of edge detections for the control signal acquired in step S2 and subsequent steps is less than a predefined value.

  Then, in step S3, the control signal processing unit 41 has the number of edge detection times of the control signal output from the photoelectric sensor 31 corresponding to the zone identification pattern row 13b within the range of 1 or more and less than the specified value. In Step 4, when there is a door opening request, it is determined that the car has been stopped in the door zone, and the process proceeds to Step S5 and subsequent steps.

  On the other hand, in step S3, the control signal processing unit 41 determines that the number of edge detection times of the control signal output from the photoelectric sensor 31 corresponding to the zone identification pattern row 13b is not less than the specified value without the door opening request in step S4. Is reached, it is determined that the car has moved out of the door zone through the door zone, the series of processes is terminated, and the door zone recognition process is canceled.

  Next, in step S5, the control signal processing unit 41 changes the mode of the photoelectric sensor 31 from the door zone detection mode to the original passenger detection mode.

  Thereafter, in step S6 to step S9, the control signal processing unit 41 outputs a door closing suppression / reverse door opening operation command to the door driving device in accordance with a control signal from the photoelectric sensor when the door is closed. In addition, since the process in these step S6-step S9 is a process of an original passenger detection mode, detailed description is abbreviate | omitted.

  In step S10, the control signal processing unit 41 changes the control signal acquired from the photoelectric sensor to be monitored as a door zone detection mode signal after the door closing is completed, and returns to step S3.

  That is, the state of the car when step S10 is completed is a state where the car is still stopped in the door zone. In addition, when there is no new call, it may be assumed that the user does not move immediately, waits on the floor as it is, and then opens again. Therefore, after step S10, the process returns to step S3, and finally, when moving to another floor, the end point of the door zone is recognized in step S3, and the series of processes is ended.

  As described above, according to the first embodiment, by providing a horizontal belt-like pattern at an appropriate position of each landing door, the photoelectric sensor that detects the presence / absence of passengers at the landing can be used to detect the door zone. It becomes possible. In other words, it becomes possible to identify the position of the car corresponding to the position where the car has stopped. As a result, it is possible to detect with high accuracy that the car has stopped at the door zone while suppressing an increase in manufacturing cost without installing a dedicated door zone detector in the elevator apparatus.

  In the above-described embodiment, the case where there is one elevator car entrance / exit has been described, but the present invention is not limited to such a configuration. The same applies to the case where there are two car doorways.

  The edge detection processing by the control signal processing unit 41 can employ not only the rising edge but also the falling edge or both the rising edge and the falling edge.

  Further, when the cage passes through a place where the irradiation destination of the photoelectric sensor 31 is not the belt-like pattern 13, in a situation where a control signal is not output, a horizontal belt-like pattern is formed only by the zone identification pattern row 13b. It is also possible to eliminate the pair of determination pattern rows.

  DESCRIPTION OF SYMBOLS 1 Hoistway wall, 11 landing door opening / closing mechanism, 12 landing door, 13 horizontal strip pattern, 13a discriminating pattern row, 13b zone discriminating pattern row, 21 car door driving device, 22 car door, 31 photoelectric Sensor, 41 Control signal processing unit.

Claims (4)

A photoelectric sensor that is installed above the car door, measures the amount of light reflected in the landing direction, and outputs a control signal that becomes an on / off pattern using a preset threshold;
In an elevator apparatus provided with a control signal processing unit for determining the presence or absence of passengers on the landing, based on the control signal output from the photoelectric sensor, with the car door and the landing door open.
The landing door has a horizontal strip pattern at a predetermined interval in a direction orthogonal to the ascending / descending direction of the car on a surface facing the car door.
The control signal processing unit, based on the control signal output from the photoelectric sensor during the period from when the car is moving before it reaches the landing to the position where the car can be opened, When the door opening request is recognized, the door zone in which the car door and the landing door can be opened by identifying which position of the belt-like pattern the car has stopped. An elevator device that determines whether or not the car has stopped. The strip pattern is
A first pattern row for identifying that the car has stopped in the door zone;
In order to determine that the position of the moving car has approached the door zone, a pair of second pattern rows provided on the upper side and the lower side of the first pattern row,
Each of the pair of second pattern rows has a pattern that is vertically asymmetric with respect to the lifting direction,
The control signal processor is
During the downward movement to stop at a certain landing, the control signal acquired from the photoelectric sensor moves the second pattern row provided above the first pattern row from the upper side of the pair of second pattern rows. Recognizing that it matches the pattern obtained from the photoelectric sensor by scanning downward, or while moving up to stop at the certain landing, the control signal acquired from the photoelectric sensor is By recognizing that it matches the pattern obtained from the photoelectric sensor by scanning the second pattern row provided on the lower side of the first pattern row from the lower side to the upper side of the pair of second pattern rows. Identify that the car is moving to approach the door zone corresponding to the floor;
After identifying that the floor is moving, until receiving a door opening request in the certain floor, obtain the control signal output from the photoelectric sensor corresponding to the first pattern row, The determination according to claim 1, wherein when the acquired control signal changes from an off state to an on state and the number of edge detections is less than a predetermined value, the car is stopped in the door zone. Elevator device. The strip-shaped pattern is a highly reflective paint capable of obtaining a reflected light amount higher than the threshold value for the light irradiated from the photoelectric sensor, and a reflective material capable of obtaining a reflected light amount lower than the threshold value. The elevator apparatus according to claim 1 or 2, wherein the elevator apparatus is made of a low material. A photoelectric sensor that is installed above the car door, measures the amount of light reflected in the landing direction, and outputs a control signal that becomes an on / off pattern using a preset threshold;
The present invention is applied to an elevator apparatus equipped with a control signal processing unit that determines whether there is a passenger at the hall based on the control signal output from the photoelectric sensor in a state where the car door and the hall door are opened. An elevator stop position determination method for determining whether the car has stopped in a door zone in which the door of the car and the landing door can be opened by diverting the photoelectric sensor,
In the control signal processing unit,
In the direction orthogonal to the up-and-down direction of the car on the surface facing the door of the car on the door of the landing until the car enters the position where the door can be opened from the movement before the arrival at the landing A first step of acquiring, from the photoelectric sensor, the control signal corresponding to the amount of reflected light emitted from the photoelectric sensor with respect to the provided horizontal belt-like pattern;
Based on the on / off pattern of the control signal acquired in the first step, the number of edge detections when the on / off pattern changes from the off state to the on state is counted, and the counted number of edge detections at the door opening request timing. And a second step of determining that the car has stopped in the door zone when the vehicle is less than a predetermined value determined in advance.

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