Anomaly detection device

Abstract

A new technology is proposed to detect external abnormalities that could interfere with the opening and closing operation of movable platform screen doors. [Solution] The abnormality detection device 1 determines any abnormalities in the appearance of the door, such as the presence of attached objects or changes in shape, based on images captured by a camera 5 that is installed so as to include the movable platform screen door 60 in its shooting range, and performs control to output a predetermined abnormality signal when it is determined that an abnormality has occurred in the appearance.

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 the opening and closing operation of this door portion, the boarding and alighting opening for passengers to board and alight from the train is opened and closed.

[0003] As a technique for determining an abnormality or its sign that has occurred in such a movable platform fence, for example, there is known a technique in which vibrations generated by the operation of a drive mechanism, the current of a drive motor, etc. are detected by a sensor and determined based on the detected detection value (for example, Patent Documents 1 and 2).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] Incidentally, problems that may occur when movable platform screen doors open and close include not only malfunctions in the drive mechanism, but also changes in shape (deformation) such as scratches, dents, and cracks on the surface of the door pockets and doors, as well as external abnormalities such as the adhesion of snow, debris, etc. (hereinafter referred to as "external abnormalities" as appropriate). Such external abnormalities can occur, for example, when crushed stone laid on the tracks is blown away for some reason and hits the movable platform screen door, or when debris or snow attached to the train is blown away or falls and hits the movable platform screen door. In addition, since railway stations are often in an outdoor environment, problems can also occur when objects blown by the wind hit the movable platform screen door, or when snow falls and adheres to it.

[0006] The problem that this invention aims to solve is to propose a new technology for detecting external abnormalities that may interfere with the opening and closing operation of movable platform screen doors. [Means for solving the problem]

[0007] The first invention for solving the above problem is: A determination means (for example, the determination unit 12 in Figure 3) determines an abnormality in the appearance of the movable platform screen door based on an image captured by a camera installed so as to include the movable platform screen door in its shooting range, A signal output control means (for example, the signal output control unit 14 in Figure 3) that performs control to output a predetermined abnormal signal when the determination means determines that an abnormality in appearance has occurred, This is an anomaly detection device equipped with [specific features / features].

[0008] According to the first invention, it becomes possible to detect external abnormalities that may interfere with the opening and closing operation of the movable platform screen door. Specifically, it becomes possible to determine external abnormalities of the movable platform screen door based on images captured by a camera installed so as to include the movable platform screen door in its shooting range, and to output an abnormality signal indicating the occurrence of an external abnormality.

[0009] The second invention is, in the above invention, The determination means determines the presence of an object attached to the movable platform fence as an abnormal appearance. It is an anomaly detection device.

[0010] According to the second invention, it becomes possible to determine the presence of an object attached to the movable platform screen door as an abnormality in the appearance of the movable platform screen door.

[0011] The third invention is, in the above invention, The determination means determines that the change in shape of the movable platform gate is an abnormal appearance. It is an anomaly detection device.

[0012] According to the third invention, it becomes possible to determine a change in the shape of the movable platform screen door as an abnormality in the appearance of the movable platform screen door.

[0013] The fourth invention is, in the above invention, The aforementioned camera is positioned to provide an overhead view of the door edges of the movable platform gate when it is fully closed. The determination means determines, based on the captured image, whether or not there is a relative misalignment between the door edges of the door section, as an abnormal appearance. It is an anomaly detection device.

[0014] According to the fourth invention, it is possible to determine a relative misalignment between the door edges of the movable platform screen doors as an abnormality in their appearance.

[0015] The fifth invention is, in the above invention, The determination means sets a reference image based on the captured image and determines the occurrence of the appearance abnormality by comparing the reference image with the new captured image. It is an anomaly detection device.

[0016] According to the fifth invention, by using a reference image based on a captured image and a newly captured image, it becomes possible to determine external abnormalities relatively easily and to improve the accuracy of the determination. [Brief explanation of the drawing]

[0017] [Figure 1]Application examples of the abnormality detection device. [Figure 2] Application examples of the abnormality detection device. [Figure 3] Configuration example of the abnormality detection device. [Figure 4] Example where a relative positional deviation occurs between the door ends of the door part. [Figure 5] Example where a relative positional deviation occurs between the door ends of the door part.

Mode for Carrying Out the Invention

[0018] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Note that the applicable forms of the present invention are not limited to the following embodiments. Also, in the description of the drawings, the same reference numerals are assigned to the same elements.

[0019] FIGS. 1 and 2 are diagrams showing an overview of application examples of the abnormality detection device 1 of the present embodiment. FIG. 1 is a cross-sectional view along the traveling direction of the train 40, and FIG. 2 is a top view of the platform 50 as viewed from above. The abnormality detection device 1 of the present embodiment detects an abnormality of the movable home gate 60 installed on the platform 50 where passengers board and alight from the train 40.

[0020] The movable home gate 60 has a door part 64 that opens and closes an opening, and a door pocket part 62 that supports and drives the opening and closing of the door part 64. On the platform 50, the movable home gate 60 is installed by connecting the door pocket parts 62 in the direction along the track so that the opening corresponds to each door of the train that stops at the platform 50.

[0021] The abnormality detection device 1 performs abnormality detection regarding the appearance abnormality of the movable home gate 60 based on the photographed image of the movable home gate 60 by the camera 5. The abnormality detection device 1 may be configured as a partial function of a control device built in or separately placed in the movable home gate 60, or may be installed in an equipment room or the like as a device separate from the control device. Note that the abnormality detection device 1 may be shared at the openings of a plurality of movable home gates 60.

[0022] 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 movable platform gate 60 and the train 40 on the track adjacent to the movable platform gate 60 in its shooting range. In this embodiment, camera 5a is installed to photograph the back side (track side) of the movable platform gate 60 from an oblique upward angle, and camera 5b is installed to photograph the front side (platform side) of the movable platform gate 60 from an oblique upward angle. Cameras 5 (5a, 5b) can be installed as a whole or as a group to photograph the part of the movable platform gate 60 that is to be targeted for abnormality detection. Alternatively, only one of cameras 5 (5a, 5b) may be installed, and the abnormality detection device 1 may be configured to detect abnormalities only on the back side (track side) or the front side (platform side) of the movable platform gate 60.

[0023] Camera 5 is connected to the anomaly detection device 1 via a wireless or wired communication line and transmits captured image data 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 captured image data. Alternatively, camera 5 may store the captured image data in a storage medium, and the anomaly detection device 1 may read the data from this storage medium at any time and perform anomaly detection of the movable platform screen door 60 based on the read data.

[0024] Figure 3 shows an example of the configuration of the anomaly detection device 1. According to Figure 3, the anomaly detection device 1 has a determination unit 12 and a signal output control unit 14.

[0025] The determination unit 12 determines any abnormalities in the appearance of the movable platform screen door 60 based on images captured by the camera 5, which is installed so as to include the movable platform screen door 60 in its shooting range 7. For example, it determines that abnormalities in appearance include the presence of substances attached to the door pocket section 62 or door section 64, changes in shape, changes in condition such as discoloration due to rust, and relative misalignment of the door edges of the door sections 64.

[0026] Specifically, for images taken by camera 5a of the back side (track side) of the movable platform gate 60 and images taken by camera 5b of the front side (platform side) of the movable platform gate 60, images taken when it has been confirmed that there are no external abnormalities (i.e., the movable platform gate 60 is normal) are pre-set as reference images. Then, the presence or absence of external abnormalities is determined by comparing the images taken by camera 5a and camera 5b with the reference image of the corresponding camera 5. The reference image is an image taken when the door section 64 of the movable platform gate 60 is closed, there are no people or objects nearby, and it has been determined that there are no external abnormalities. For example, the reference image may be an image taken when it has been confirmed in advance that there are no external abnormalities in the movable platform gate 60, after the arrival of the train 40, with the door section 64 of the movable platform gate 60 closed, and before passengers board or alight from the train 40. The external abnormalities to be judged include changes in shape such as scratches, dents, damage, and cracks on the surface of the door pocket section 62 and the door section 64, as well as changes in condition such as the presence of attached substances such as dirt, debris, and snow, and discoloration due to rust, etc.

[0027] Furthermore, if camera 5 is installed above the movable platform screen door 60 so as to include the door section 64 in its shooting range, the camera 5 may determine whether or not there is a relative misalignment between the leading edges of the door section 64 as an abnormal appearance based on the image it captures. Specifically, the camera detects the outline of the door section 64 in the image captured when the door section 64 of the movable platform screen door 60 is in the closed position, and determines whether or not there is a relative misalignment between the leading edges of the door section 64 based on whether or not the outlines of the door section 64 along the longitudinal direction are approximately the same.

[0028] Figures 4 and 5 are top views of the door section 64 in the closed position, viewed from above. 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 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 where the linear motion guide direction for opening and closing one door section 64a is misaligned at an angle, resulting in a relative positional misalignment with the leading edge of the other door section 64b. Figure 5 is an example where, due to an abnormality in the support mechanism of the door section 64 in the door pocket section 62, the linear motion guide direction of one door section 64c is misaligned parallel to the lower side in the figure, resulting in a relative positional misalignment with the leading edge of the other door section 64d when fully closed.

[0029] Furthermore, the determination of any external abnormalities is made after the train's arrival and before the doors 64 of the movable platform screen door 60 open (while they are closed). If the determination is made that there are no external abnormalities, the image captured at that time is updated as the new reference image, confirming that there are no external abnormalities. Since the surrounding environment of the movable platform screen door 60, such as sunlight, changes moment by moment, updating the reference image each time an external abnormality is determined to be absent makes it possible to improve the accuracy of the external abnormality detection.

[0030] Furthermore, regarding the images of the surface (platform side) of the movable platform gate 60 taken by camera 5b, since the presence of people on the platform 50 is anticipated, instead of updating the images each time a "no external abnormality" is determined, it may be possible to update the images using, for example, images taken before the start of commercial operation or after the end of operation when there are no passengers, as reference images.

[0031] Furthermore, the arrival of the train and the open / closed state of the movable platform gates 60 may be determined from the captured images, or they may be determined by receiving an instruction signal for opening and closing the movable platform gates 60 from an external input.

[0032] The signal output control unit 14 performs control to output a predetermined abnormal signal when the determination unit 12 determines that an abnormal appearance has occurred.

[0033] Specifically, when the determination unit 12 determines that there is an abnormality in the appearance of the movable platform screen door 60, it controls the system to output an abnormality signal to the outside of the device. At that time, the abnormality signal includes information indicating whether the abnormality is based on the image captured by camera 5a or 5b, that is, whether it is an abnormality on the back (track side) or the front (platform side) of the movable platform screen door 60. The destination of the abnormality signal can be arbitrarily set, for example, to an alarm device or monitoring device installed in the station staff's office or office at the station in question.

[0034] According to this embodiment, it is possible to detect external abnormalities that may interfere with the opening and closing operation of the movable platform screen door 60. Specifically, it is possible to determine external abnormalities of the movable platform screen door 60 based on images captured by the camera 5 and output an abnormality signal indicating the occurrence of an external abnormality. External abnormalities of the movable platform screen door 60 can include the presence of substances attached to the door pocket section 62 and the door section 64, as well as changes in shape. Furthermore, by using a reference image based on the captured image and a newly captured image, it is possible to determine external abnormalities relatively easily and improve the accuracy of the determination.

[0035] 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.

[0036] (A) Obstacle sensor Furthermore, if an obstacle sensor is provided to detect people or objects trapped between the movable platform screen door 60 and the train 40, the camera 5a may be installed integrally with the obstacle sensor on the track side of the movable platform screen door 60 so as to photograph the movable platform screen door 60 from the side. Alternatively, the camera provided by the obstacle sensor may be used instead of camera 5a. In addition, changes in shape or state of the obstacle sensor, as well as the presence of attached objects, may also be determined as abnormal appearances. [Explanation of symbols]

[0037] 1... Anomaly detection device 12...Judgment section 14...Signal output control unit 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 an abnormality in the appearance of the movable platform screen door based on an image captured by a camera installed so as to include the movable platform screen door in its shooting range, A signal output control means that performs control to output a predetermined abnormal signal when the determination means determines that an abnormality in appearance has occurred, An anomaly detection device equipped with the following features.

2. The determination means determines the presence of an object attached to the movable platform fence as an abnormal appearance. An anomaly detection device according to claim 1.

3. The determination means determines that the change in shape of the movable platform gate is an abnormal appearance. An anomaly detection device according to claim 1.

4. The aforementioned camera is positioned to provide an overhead view of the door edges of the movable platform gate when it is fully closed. The determination means determines, based on the captured image, whether or not there is a relative misalignment between the door edges of the door section, as an abnormal appearance. An anomaly detection device according to claim 1.

5. The determination means sets a reference image based on the captured image and determines the occurrence of the appearance abnormality by comparing the reference image with the new captured image. An anomaly detection device according to any one of claims 1 to 4.

Images