Anomaly detection device

Abstract

A new technology is proposed to determine obstacles that could cause false detections in the detection of abnormalities in movable platform screen doors. [Solution] The abnormality detection device 1 determines whether the movable platform gate 60 is being obstructed from opening or closing based on the image captured by the camera 5, which is installed so as to include the door portion of the movable platform gate 60 in its shooting range 7. If it is determined that an obstruction has occurred, the device controls the device to output a predetermined obstruction occurrence signal. For example, it determines that a door getting caught is an occurrence of an obstruction, and controls the device to output a door getting caught detection signal to the movable platform gate 60.

Description

Technical Field

[0001] The present invention relates to an abnormality detection device.

Background Art

[0002] There is known a movable platform fence installed on a platform of a railway station and partitioning the platform from the track side. The movable platform fence has a drive mechanism in a door pocket portion that supports and drives the opening and closing of a door portion. During the opening operation, the door portion is stored in the door pocket portion, and during the closing operation, the door portion is advanced from the door pocket portion. By this opening and closing drive, an entrance / exit for passengers to board and alight from the train is opened and closed. Various techniques for detecting an abnormality occurring in such a movable platform fence based on the detection value of a sensor are known. For example, there is known a technique for detecting an abnormality in the drive mechanism based on current data, which is a detection value obtained by detecting a motor current included in the drive mechanism of the door portion with a current sensor (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the motor current, which is the driving source of the door portion, becoming an abnormal value can also occur due to external factors that inhibit the opening and closing operation of the door portion, such as the occurrence of door pinching where a person or an object is sandwiched between the closed door portions, even if there is no abnormality in the drive mechanism. Detecting an abnormality in the movable platform fence based on an abnormal value of the motor current due to this external factor is a false detection. This problem is not limited to the case of detecting an abnormality in the movable platform fence based on the motor current detected by a current sensor, but can also occur similarly in the case of detecting an abnormality in the movable platform fence based on vibrations detected by a vibration sensor or sounds detected by an acoustic sensor.

[0005] The problem that this invention aims to solve is to propose a new technique for determining opening and closing obstructions that cause false detections in the detection of abnormalities in movable platform screen doors. [Means for solving the problem]

[0006] The first invention for solving the above problem is: A determination means (for example, the determination unit 10 in Figure 3) determines the occurrence of obstruction to the opening and closing of the movable platform screen door based on an image captured by a camera installed so as to include the door portion of the movable platform screen door in its shooting range, A signal output control means (for example, the signal output control unit 30 in Figure 3) that performs control to output a predetermined obstruction signal when the determination means determines that an opening / closing obstruction has occurred, This is an anomaly detection device equipped with [specific features / features].

[0007] According to the first invention, it is possible to determine opening / closing obstructions that could cause false detections in the detection of abnormalities in movable platform screen doors. Specifically, by determining opening / closing obstructions of the movable platform screen doors based on images captured by a camera and outputting an obstruction occurrence signal, it is possible to notify the outside that an opening / closing obstruction has occurred.

[0008] The second invention is, in the above invention, The determination means includes a door pinch determination means (for example, the door pinch determination unit 12 in Figure 3) that determines the occurrence of a door pinch based on the captured image. It is an anomaly detection device.

[0009] According to the second invention, it becomes possible to detect the occurrence of door entrapment as an obstruction to the opening and closing of the movable platform screen door.

[0010] The third invention is, in the above invention, The signal output control means controls the output of a door entrapment detection signal to the movable platform gate when the door entrapment detection means determines that a door entrapment has occurred. The aforementioned movable platform gate performs predetermined release control based on the door-entrapment detection signal. It is an anomaly detection device.

[0011] According to the third invention, a door entrapment detection signal indicating the occurrence of door entrapment is output to the movable platform screen door, and the movable platform screen door can, in response to the door entrapment detection signal, loosen the door section to facilitate the resolution of the door entrapment.

[0012] The fourth invention is, in the above invention, The aforementioned door jamming detection means determines the extent to which the door jamming prevents it from closing completely, The signal output control means outputs the information indicating the size along with the door jamming detection signal. It is an anomaly detection device.

[0013] According to the fourth invention, information indicating the extent to which the door is obstructed from closing due to the entrapment is included in the door entrapment detection signal and output. This allows the movable platform screen door to adjust the degree to which it loosens the door according to the size of the entrapment, thereby quickly resolving the problem.

[0014] The fifth invention is, in the above invention, The determination means includes a pry-opening determination means (for example, the pry-opening determination unit 14 in Figure 3) that determines the occurrence of pry-opening based on the captured image. It is an anomaly detection device.

[0015] According to the fifth invention, it is possible to detect the occurrence of forced entry as an obstruction to the opening and closing of a movable platform screen door.

[0016] The sixth invention is, in the above invention, The aforementioned camera is positioned to provide an overhead view of the door edges when the door is fully closed. The determination means includes a door edge position misalignment determination means (for example, the door edge position misalignment determination unit 16 in Figure 3) that determines, based on the captured image, whether or not there is a relative position misalignment between the door edges when the door is fully closed. It is an anomaly detection device.

[0017] According to the sixth invention, it becomes possible to determine the occurrence of a relative positional deviation between the door ends of the door part when fully closed as an obstruction to the opening and closing of the movable home fence.

[0018] The seventh invention is the above-described invention, When it is determined by the determination means that no opening / closing obstruction has occurred, an operation abnormality detection means (for example, the operation abnormality detection unit 20 in FIG. 3) that detects an operation abnormality of the movable home fence based on a detection value of a predetermined sensor provided on the movable home fence, further comprising an abnormality detection device.

[0019] According to the seventh invention, when no opening / closing obstruction has occurred, it becomes possible to detect an operation abnormality of the movable home fence based on a detection value of a sensor provided on the movable home fence. Thereby, it becomes possible to suppress false detection of an operation abnormality of the movable home fence.

Brief Description of the Drawings

[0020] [Figure 1] An application example of the abnormality detection device. [Figure 2] An application example of the abnormality detection device. [Figure 3] A configuration example of the abnormality detection device. [Figure 4] An example in which a relative positional deviation occurs between the door ends of the door part. [Figure 5] An example in which a relative positional deviation occurs between the door ends of the door part.

Embodiments for Carrying Out the Invention

[0021] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Note that the form to which the present invention is applicable is not limited to the following embodiments. Also, in the description of the drawings, the same reference numerals are given to the same elements.

[0022] Figures 1 and 2 show a schematic diagram of an application example of the abnormality detection device of this embodiment. Figure 1 is a cross-sectional view along the direction of travel of the train 40, and Figure 2 is a top view of the platform 50 seen from above. The abnormality detection device 1 of this embodiment detects abnormalities in the movable platform gate 60 installed on the platform 50 where passengers board and alight from the train 40. The movable platform gate 60 has a door section 64 that opens and closes an opening, and a door pocket section 62 that supports the door section 64 and drives it to open and close. On the platform 50, the movable platform gate 60 is installed with the door pocket sections 62 connected in a direction along the track so that the openings correspond to each door of the train stopped at the platform 50.

[0023] The abnormality detection device 1 detects abnormalities in the movable platform gate 60 based on the detection values ​​of the sensor 3 installed on the movable platform gate 60 and the images of the movable platform gate 60 captured by the camera 5. The abnormality detection device 1 may be configured as part of a control device built into or separately installed in the movable platform gate 60, or it may be installed as a separate device in an equipment room or the like. The abnormality detection device 1 may also be shared by multiple openings of the movable platform gate 60.

[0024] Sensor 3 is installed inside the movable platform screen door 60 and is a sensor that detects physical quantities associated with the opening and closing operation of the door portion 64 of the movable platform screen door 60. In this embodiment, sensor 3 is a current sensor that measures the current of the motor that drives the opening and closing of the door portion 64, but other sensors such as vibration sensors or acoustic sensors may also be used. In the case of vibration sensors or acoustic sensors, they may be installed near the movable platform screen door 60.

[0025] Camera 5 is installed on the ceiling of the platform 50 to provide an overhead view of the movable platform gate 60, and to include the door section 64 of the movable platform gate 60 (specifically, at least the edges of the door sections 64 when fully closed) and the train 40 on the track adjacent to the door section 64 in its shooting range 7. In this embodiment, Camera 5 is installed for each opening that is opened and closed by the door section 64 of the movable platform gate 60, but one camera 5 may be installed to include multiple openings in its shooting range 7.

[0026] Sensor 3 and camera 5 are connected to the anomaly detection device 1 via a wireless or wired communication line, and transmit the detected data from sensor 3 and the captured image data from camera 5 to the anomaly detection device 1 at any time. The anomaly detection device 1 performs anomaly detection of the movable platform screen door 60 based on this detected data and captured image data. Alternatively, sensor 3 and camera 5 may store the detected data and captured image data in their respective storage media, and the anomaly detection device 1 may read the data from these storage media at any time and perform anomaly detection of the movable platform screen door 60 based on the read data.

[0027] Figure 3 shows an example of the configuration of the abnormality detection device 1 in this embodiment. According to Figure 3, the abnormality detection device 1 includes a determination unit 10, an operation abnormality detection unit 20, and a signal output control unit 30.

[0028] The determination unit 10 determines the occurrence of obstruction to the opening and closing of the movable platform gate 60 based on the image captured by the camera 5, which is installed so as to include the door portion 64 of the movable platform gate 60 in its shooting range 7. Obstruction to opening and closing refers to a situation in which the door portion 64 is not properly closed due to events such as a person or object getting caught in the door portion 64 (door pinching), a person prying open the door portion 64 (prying open), or the door edge being misaligned due to pressure from a person or object on the door portion 64 (door edge misalignment). The determination unit 10 includes a door pinching determination unit 12, a prying open determination unit 14, and a door edge misalignment determination unit 16.

[0029] The door entrapment detection unit 12 determines the occurrence of door entrapment based on the captured image. It also determines the extent to which the door is prevented from closing completely due to the entrapment.

[0030] Specifically, the system detects the door section 64 and the leading edge of the door section 64 in the image captured by camera 5, and determines whether the door section 64 or the leading edge of the door section 64 is moving in the direction of closing the opening. It also determines whether the leading edges of the door sections 64 are in close contact with each other. Furthermore, it detects the presence or absence of objects near the door section 64 in the captured image. After the closing operation of the door section 64, it determines the occurrence of door entrapment, where the movement of the door section 64 or the leading edge of the door section 64 stops when the leading edges are not in close contact and some object is present (stuck) between them. It also detects the distance between the leading edges of the door sections 64 at that time and determines that distance as the magnitude by which full closing is prevented by the object being trapped.

[0031] Furthermore, the determination that the door section 64 is in the closing operation may be further confirmed based on the positive or negative sign of the motor current, which is the value detected by the sensor 3, or on the opening and closing operation instruction signal output by the control device of the movable platform gate 60 to the drive mechanism. In addition, the determination of whether door entrapment has occurred may be confirmed based on whether or not excessive torque is being generated in the motor, which is the value detected by the sensor 3.

[0032] The forced entry detection unit 14 determines whether forced entry has occurred based on the captured image.

[0033] Specifically, the system detects the door section 64 or the leading edge of the door section 64 in the image captured by camera 5, and determines whether the door section 64 is fully closed or in a closing operation where it is moving in the direction of closing the opening. Then, it determines whether prying open has occurred, where the door section 64 or the leading edge of the door section 64 is moved in the direction of opening when the door section 64 is fully closed or in a closing operation.

[0034] Furthermore, the determination of whether the door section 64 is fully closed or in the closing operation may be further determined based on the magnitude and sign of the motor current, which is the value detected by the sensor 3, and the opening and closing operation instruction signal output by the control device of the movable platform gate 60 to the drive mechanism. In addition, the determination of whether forced opening has occurred may be determined based on whether excessive torque is being generated in the motor, which is the value detected by the sensor 3.

[0035] The door edge position misalignment determination unit 16 determines whether or not there is a relative positional misalignment between the door edges of the door sections 64 when fully closed, based on images captured by a camera 5 positioned to view the door edges of the door sections 64 from above when fully closed.

[0036] Specifically, the system detects the door section 64 in the image captured by camera 5 and determines whether the door section 64 is fully closed based on the completion of its closing operation. Then, it detects the outline of the door section 64 in the image captured when the door is fully closed and determines whether there is a relative misalignment between the door edges based on whether the outlines of the door sections 64 along the longitudinal direction substantially coincide. This relative misalignment between the door edges can occur, for example, when the door section 64 is pushed toward the track by a passenger pushing against it.

[0037] Figures 4 and 5 are top views of the door section 64 when fully closed, viewed from above. Both Figures 4 and 5 show a state in which a relative misalignment occurs between the door edges due to a passenger pressing against one of the door sections 64. In the figures, the upper side is the track side, and the lower side is the platform side. Camera 5 takes a bird's-eye view of the door section 64 of the movable platform gate 60 from above, so the captured images show the door section 64 as seen from above, as shown in Figures 4 and 5. Figure 4 is an example in which the linear motion guide direction for opening and closing one door section 64a in the door pocket section 62 is shifted diagonally, resulting in a relative misalignment with the door edge of the other door section 64b. Figure 5 is an example in which the linear motion guide direction of door section 64c is shifted to slide parallel to the lower side in the figure, resulting in a relative misalignment with the door edge of the other door section 64d when fully closed.

[0038] Returning to Figure 3, the abnormal operation detection unit 20 detects an abnormal operation of the movable platform gate 60 based on the detection value of a predetermined sensor 3 provided on the movable platform gate 60, when the determination unit 10 determines that no obstruction to opening or closing has occurred.

[0039] Specifically, based on the current data detected by sensor 3, an operational abnormality of the drive mechanism that drives the opening and closing of the door section 64 of the movable platform screen door 60 is detected. For example, current data during the opening and closing operation of the door section 64 is extracted from the current data for each of the left and right pair of door sections 64 that open and close one opening, and the presence or absence of an operational abnormality is determined by comparing the current waveforms of each extracted current data. Normally, the drive mechanisms for the left and right pair of door sections 64 related to one opening are the same, and they are opened and closed simultaneously, and their movement is also the same, so the waveform of the motor current during the opening and closing operation should be approximately the same. From this, the presence or absence of an operational abnormality can be determined by whether or not the waveform of the motor current during the opening and closing operation of the left and right pair of door sections 64 is approximately the same. Alternatively, the presence or absence of an operational abnormality of a door section 64 may be determined by whether or not it matches the waveform of the motor current under normal conditions which is predetermined for each door section 64. Alternatively, the presence or absence of an operational abnormality may be determined by whether or not the current value exceeds a predetermined threshold.

[0040] Whether the door section 64 is in the opening or closing operation can be determined, for example, based on an opening / closing operation instruction signal output to the drive mechanism by the control device of the movable platform gate 60, or it can be determined from the image captured by the camera 5. Alternatively, since the motor rotation direction is opposite and the positive and negative signs of the motor current are opposite for the opening and closing operations of the door section 64, the opening and closing operations can be distinguished based on the motor current.

[0041] The signal output control unit 30 outputs a predetermined obstruction signal when the determination unit 10 determines that an obstruction has occurred. For example, if the door entrapment determination unit 12 determines that an obstruction has occurred, it outputs a door entrapment determination signal indicating that fact. Also, if the pry-opening determination unit 14 determines that a pry-opening has occurred, it outputs a pry-opening determination signal indicating that fact. Also, if the door edge position misalignment determination unit 16 determines that a relative position misalignment has occurred between the door edges of the door section 64, it outputs a door edge position misalignment occurrence signal indicating that fact. Also, if the operation abnormality detection unit 20 detects an operation abnormality of the movable platform fence 60, it outputs an operation abnormality detection signal indicating that fact.

[0042] These signals are output to the outside of the abnormality detection device 1 and input to an external device, such as the control device of the movable platform screen door 60. When the movable platform screen door 60 receives a door entrapment detection signal, it performs a predetermined relief control based on the door entrapment detection signal. For example, the movable platform screen door 60 performs a relief control that temporarily reduces the motor's driving force to encourage the resolution of the door entrapment. The signal output control unit 30 may also output information indicating the extent to which the door is obstructed from closing due to the door entrapment in the door entrapment detection signal. In this case, the movable platform screen door 60 may perform a relief control that changes the degree to which it reduces the motor's driving force based on the information indicating the size of the obstruction included in the door entrapment detection signal to encourage the early resolution of the door entrapment.

[0043] According to this embodiment, it is possible to determine opening and closing obstructions that could cause false detections in the detection of abnormalities in the movable platform screen door 60. Specifically, it is possible to determine the opening and closing obstruction of the movable platform screen door 60 based on the image captured by the camera 5 and output an obstruction occurrence signal to notify the outside of the occurrence of the opening and closing obstruction. Specifically, it is possible to determine the occurrence of door entrapment as an opening and closing obstruction of the movable platform screen door 60 and output a door entrapment determination signal indicating the occurrence of door entrapment to the movable platform screen door 60. The movable platform screen door 60 can then control the motor to release the driving force in the closing direction of the door section 64 in response to the door entrapment determination signal, thereby promoting the resolution of the door entrapment. Furthermore, it is also possible to determine the occurrence of prying open or misalignment of the door edge due to pressing as opening and closing obstructions of the movable platform screen door 60.

[0044] It should be noted that the applicable embodiments of the present invention are not limited to those described above, and can be modified as appropriate without departing from the spirit of the invention.

[0045] (A)com Although sensor 3 is a current sensor in this example, other sensors such as a vibration sensor or an acoustic sensor may also be used. Similar to the case of a current sensor, it is possible to detect abnormalities in the operation of the drive mechanism that drives the opening and closing of the door section 64 based on the detected vibration data or acoustic data.

[0046] (B) Installation position of camera 5 Camera 5 may be installed on the track side of the movable platform screen door 60 to photograph the movable platform screen door 60 from the side, including the space between the movable platform screen door 60 and the train. For example, camera 5 may be installed on the track-side side of the door pocket section 62, with the shooting direction facing the door edge of the door section 64, or it may be installed in conjunction with the obstacle sensor provided by the movable platform screen door 60. Alternatively, the camera provided by the obstacle sensor may be used instead of camera 5. [Explanation of Symbols]

[0047] 1... Anomaly detection device 10…Judgment section 12... Door jamming detection unit 14... Pry-open detection unit 16... Door edge position misalignment detection unit 20... Abnormal Operation Detection Unit 30...Signal output control unit 3...Sensor 5…Camera 7…Shooting range 40... train 50...Platform 60…Movable platform screen doors 62... Door pocket section 64... Door section

Claims

1. A determination means for determining the occurrence of obstruction to the opening and closing of the movable platform screen door, based on images captured by a camera installed so as to include the door portion of the movable platform screen door in its shooting range, A signal output control means that performs control to output a predetermined interference signal when the determination means determines that an opening / closing interference has occurred, An anomaly detection device equipped with the following features.

2. The determination means includes a door-claw determination means that determines the occurrence of a door jam based on the captured image. An anomaly detection device according to claim 1.

3. The signal output control means controls the output of a door entrapment detection signal to the movable platform gate when the door entrapment detection means determines that a door entrapment has occurred. The aforementioned movable platform gate performs predetermined release control based on the door-entrapment detection signal. An anomaly detection device according to claim 2.

4. The aforementioned door jamming detection means determines the extent to which the door jamming prevents it from closing completely, The signal output control means outputs the information indicating the size along with the door jamming detection signal. An anomaly detection device according to claim 3.

5. The determination means includes a pry-opening determination means that determines the occurrence of pry-opening based on the captured image. An anomaly detection device according to claim 1.

6. The aforementioned camera is positioned to provide an overhead view of the door edges when the door is fully closed. The determination means includes a door edge position misalignment determination means that determines, based on the captured image, whether or not there is a relative positional misalignment between the door edges when the door is fully closed. An anomaly detection device according to claim 1.

7. If the determination means determines that no obstruction to opening or closing has occurred, the operation abnormality detection means detects an abnormality in the operation of the movable platform fence based on the detection value of a predetermined sensor provided on the movable platform fence. It also has, An anomaly detection device according to any one of claims 1 to 6.

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