Platform door device, status determination device, area sensor status determination method, and area sensor status determination program

Abstract

To provide a platform door device, a state determination device, an area sensor state determination method, and an area sensor state determination program which grasp an abnormality of an outgoing part of an area sensor without other device installations to detect an area sensor state.SOLUTION: A platform door device 5 which has a door to open / close an entrance on a platform, an emission part 21 for emitting light, and a light reception part 22 for receiving the emitted light from the emission part 21, comprises a monitor area of a prescribed space of the platform, an area sensor 20 for detecting an existence of an object in a detection area including the platform ground and a ground area reflecting the light, a control part 13A for controlling a door opening / closing in response to a detection result of the area sensor 20 in the monitor area, and a determination part 13B for determining that the emission part 21 has an abnormality when the detection result indicates that area sensor 20 in the ground area does not detect a good.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a platform door device, a state determination device, a state determination method for an area sensor, and a state determination program for an area sensor. [Background technology]

[0002] The platform door device described in Patent Document 1 is installed on a platform at a station or the like to separate the platform from a track such as a railway line. The platform door device closes the boarding / alighting entrance by having doors protrude from a door pocket installed on the platform, and opens the entrance by having the doors retract into the door pocket. The platform door device is equipped with an area sensor that detects the area around the platform door device. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-183823 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the platform door device described above, a separate device for detecting the state of the area sensor is required to detect abnormalities caused by dirt on the light emitting portion of the area sensor that emits light, etc. Therefore, there is a need to detect abnormalities in the area sensor without providing a separate device for detecting the state of the area sensor. [Means for solving the problem]

[0005] A platform door device that solves the above problem comprises a door that opens and closes the boarding and alighting entrance on the platform, an emission unit that emits light, and a light receiving unit that receives the light emitted from the emission unit, and is equipped with an area sensor that detects the presence or absence of an object within a detection area, the detection area being the platform or track and including a monitoring area which is a specified space within the object and a ground area which is the ground of the object and reflects the light, a control unit that controls the opening and closing of the door in accordance with the detection result of the area sensor in the monitoring area, and a judgment unit that judges that there is an abnormality in the emission unit when the detection result of the area sensor in the ground area indicates that the object has not been detected.

[0006] According to the above configuration, the detection area of ​​the area sensor includes the ground area where the area sensor detects the target ground, so it is possible to determine whether or not there is an abnormality in the emission part of the area sensor. Therefore, the platform door device can detect an abnormality in the emission part of the area sensor without providing a separate device for detecting the state of the area sensor.

[0007] A platform door device that solves the above problem comprises a door that opens and closes the boarding and alighting entrance on the platform, an emission unit that emits light, and a light receiving unit that receives the light emitted from the emission unit, and is equipped with an area sensor that detects the presence or absence of an object within a detection area, the detection area being the platform or track and including a monitoring area which is a specified space within the object and a ground area which is the ground of the object and reflects the light, a control unit that controls the opening and closing of the door in accordance with the detection result of the area sensor in the monitoring area, and a judgment unit that judges that there is an abnormality in the emission unit if the detection result of the area sensor in the ground area differs from a reference value.

[0008] According to the above configuration, the detection area of ​​the area sensor includes the ground area where the area sensor detects the target ground, so it is possible to determine whether or not there is an abnormality in the emission part of the area sensor. Therefore, the platform door device can detect an abnormality in the emission part of the area sensor without providing a separate device for detecting the state of the area sensor.

[0009] With regard to the above-mentioned platform door device, it is preferable that the judgment unit judges that there is an abnormality in the emitting unit if the intensity of light received by the light receiving unit after being emitted from the emitting unit toward the ground area is smaller than the reference value.

[0010] With regard to the above-mentioned platform door device, it is preferable that the judgment unit judges that there is an abnormality in the emitting unit if the time required for the light emitted from the emitting unit toward the ground area to be received by the light receiving unit is shorter than the reference value.

[0011] In the above-mentioned platform door device, it is preferable that the ground area is located on an extension of at least a portion of the monitoring area. With regard to the above-mentioned platform door device, it is preferable that the judgment unit judges whether or not there is an abnormality in the emission unit when it receives a fully closed signal indicating that the door is fully closed.

[0012] It is preferable that the above-mentioned platform door device is provided with an alarm unit that notifies the judgment result when the judgment unit judges that there is an abnormality in the emission unit. With regard to the above-mentioned platform door device, when the judgment unit determines that there is an abnormality in the emission unit, it is preferable that the judgment result be reported to a general control panel that controls the platform door device installed on the platform.

[0013] In the above-mentioned platform door device, it is preferable that the ground area includes a first ground area and a second ground area different from the first ground area, and that the judgment unit judges that there is an abnormality due to dirt on the emission unit when the detection results of the first ground area and part of the second ground area indicate that the object has not been detected.

[0014] With regard to the above-mentioned platform door device, it is preferable that the judgment unit judges that if neither the detection results of the first ground area nor the second ground area indicate that the object has been detected, the abnormality is other than dirt on the emission part of the area sensor.

[0015] With regard to the above-mentioned platform door device, it is preferable that the area sensor be used for obstacle detection, which detects objects located on the movement trajectory of the door, or for overstaying detection, which detects objects located closer to the track than the door on the platform.

[0016] A condition determination device that solves the above problem comprises an emission unit that emits light and a light receiving unit that receives the light emitted from the emission unit, an area sensor that detects the presence or absence of an object within a detection area, which is a platform or track, and includes a monitoring area that is a predetermined space above the object and a ground area that is the ground of the object and reflects the light, and a determination unit that determines that there is an abnormality in the emission unit when the detection result of the area sensor in the ground area indicates that the object has not been detected.

[0017] According to the above configuration, since the detection area of ​​the area sensor includes the ground area where the area sensor detects the target ground, it is possible to determine whether or not there is an abnormality in the emission part of the sensor area. Therefore, it is possible to grasp the abnormality of the area sensor through detection by the area sensor without providing a separate device for detecting the state of the area sensor.

[0018] A method for determining the state of an area sensor that solves the above problem includes a detection step in which the area sensor detects the presence or absence of an object within a detection area, which includes an emission unit that emits light and a light receiving unit that receives the light emitted from the emission unit, and which is a platform or track as the target, a monitoring area that is a predetermined space above the target, and a ground area that is the ground of the target and reflects the light, and a determination step in which, if the detection result of the area sensor in the ground area does not detect the ground, it is determined that there is an abnormality in the emission unit.

[0019] According to the above method, since the detection area of ​​the area sensor includes the ground area where the area sensor detects the target ground, it is possible to determine whether or not there is an abnormality in the emission part of the sensor area. Therefore, it is possible to grasp the abnormality in the emission part of the area sensor without providing a separate device for detecting the state of the area sensor.

[0020] A condition judgment program for an area sensor that solves the above problem comprises an emission unit that emits light and a light receiving unit that receives the light emitted from the emission unit, and causes a computer to execute a detection step in which the area sensor detects the presence or absence of an object within a detection area, which is a platform or track, and includes a monitoring area that is a predetermined space above the target and a ground area that is the ground of the target and reflects the light, and a judgment step in which the detection result of the area sensor in the ground area does not detect the ground, and determines that there is an abnormality in the emission unit.

[0021] According to the program, since the detection area of ​​the area sensor includes the ground area where the area sensor detects the target ground, it is possible to determine whether or not there is an abnormality in the emission part of the sensor area. Therefore, it is possible to detect an abnormality in the emission part of the area sensor without providing a separate device for detecting the state of the area sensor. [Effects of the Invention]

[0022] According to the present invention, an abnormality in the emission section of the area sensor can be detected without providing a separate device for diagnosing the area sensor. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 1 is a plan view showing a platform on which a first embodiment of a platform door device is installed. [Figure 2] A front view showing the schematic configuration of the platform door device of the same embodiment. [Figure 3] FIG. 2 is a block diagram showing the electrical configuration of the platform door device of the embodiment. [Figure 4] A front view showing the abnormality determination process of the emission section by the platform door device of the same embodiment. [Figure 5] A front view showing the abnormality determination process of the emission section by the platform door device of the same embodiment. [Figure 6] 10 is a flowchart showing the abnormality determination process performed by the platform door device of the same embodiment. [Figure 7]A side view showing a platform on which a second embodiment of the platform door device is installed. [Figure 8] A front view showing the abnormality determination process of the emission section by the platform door device of the same embodiment. [Figure 9] A side view showing a platform on which a third embodiment of the platform door device is installed. [Figure 10] A side view showing the abnormality determination process of the emission unit by the platform door device of the same embodiment. [Figure 11] FIG. 2 is a block diagram showing the electrical configuration of the state determination device. DETAILED DESCRIPTION OF THE INVENTION

[0024] (First embodiment) A first embodiment of the platform door device will be described below with reference to Figures 1 to 6. The platform door device is installed on a station platform.

[0025] As shown in FIG. 1, a station 1 is provided with a track 2 and a platform 3 along the track 2. A plurality of platform door devices 5 are installed in a line along the direction in which the platform 3 extends.

[0026] (Platform door device 5) As shown in Figures 1 and 2, the platform door device 5 separates the platform 3 side from the track 2 side. The platform door device 5 includes a door pocket 10, a first door 11, and a second door 12. The door pocket 10 is fixed to the platform 3. The first door 11 and the second door 12 are double sliding doors that are supported on the door pocket 10 by guide members (not shown) such as linear guides and are provided so as to be able to advance and retreat from the door pocket 10 in the opening and closing directions. The first door 11 and the second door 12 open and close a boarding and alighting entrance E on the platform 3. The boarding and alighting entrance E is located between the door pockets 10. The first door 11 is supported on the door pocket 10 so as to be able to move in the opening and closing directions. The first door 11 is provided on the left side of the door pocket 10 so as to be able to advance and retreat. The second door 12 is supported on the door pocket 10 so as to be able to move in the opening and closing directions. The second door 12 is provided on the right side of the door pocket 10 so as to be able to advance and retreat. One entrance E is opened and closed by two platform door devices 5. That is, the entrance E is opened and closed by the second door 12 of the platform door device 5 located on the left side and the first door 11 of the platform door device 5 located on the right side. Note that the first door 11 and the second door 12 may be arranged so as to be movable forward and backward from only one of the left and right side surfaces of the door pocket 10.

[0027] The platform door device 5 is equipped with an area sensor 20. The area sensor 20 performs obstacle detection, detecting objects located on the movement trajectories of the first door 11 and the second door 12. The area sensor 20 detects the presence or absence of objects located between the door pockets 10. The area sensor 20 is provided on the right side of the door pocket 10. The area sensor 20 emits light from the right side of the door pocket 10 and receives light reflected from objects. The area sensor 20 scans the light by rotating a reflective mirror to form a detection area. The area sensor 20 forms a monitoring area AS as a detection area between the door pockets 10. The platform 3 is the target. Objects detected by the area sensor 20 include people, obstacles, and the ground. The area sensor 20 measures the distance to an object from which light is reflected using the time-of-flight (TOF) principle. The area sensor 20 identifies the position of the object from which the light is reflected based on the rotation angle of the reflecting mirror and the distance to the object. The area sensor 20 determines the range of the detection area by setting whether or not the position of the object from which the light is reflected is included in the detection area.

[0028] Next, the electrical configuration of the platform door device 5 will be described with reference to FIG. As shown in Figure 3, the platform door devices 5 are each connected to a general control panel 4 installed on each platform 3 via a communication line L. The platform door devices 5 include a door controller 13, a first drive unit 14, a second drive unit 15, an area sensor 20, and an alarm unit 16. The first drive unit 14, the second drive unit 15, the area sensor 20, and the alarm unit 16 are connected to the door controller 13.

[0029] The area sensor 20 includes an emission unit 21 and a light receiving unit 22. The emission unit 21 shines a laser (an example of light) on a reflecting mirror and can change the emission direction by rotating the reflecting mirror. The light receiving unit 22 is a photodiode that receives the light emitted from the emission unit 21. The area sensor 20 determines whether or not an object has been detected based on the timing at which the emission unit 21 emits light and the timing at which the light receiving unit 22 receives light, and outputs the determination result to the door controller 13 as a detection result.

[0030] (Door Controller 13) The door controller 13 may be configured as one or more processors that execute various processes according to a computer program (software). The processes executed by the door controller 13, i.e., the processor, include a state determination method for the area sensor 20. The state determination method for the area sensor 20 includes a detection step and a determination step, which will be described later. The door controller 13 may also be configured as a circuit including one or more dedicated hardware circuits, such as an application-specific integrated circuit (ASIC), or a combination thereof, that execute at least some of the various processes. The processor includes a CPU and memories, such as RAM and ROM. The memory stores program code or instructions configured to cause the CPU to execute the processes. The memory, i.e., computer-readable medium, includes any available medium accessible by a general-purpose or dedicated computer. The program stored on the computer-readable medium includes a state determination program for the area sensor 20. The state determination program for the area sensor 20 causes a computer to execute a detection step and a determination step.

[0031] The first drive unit 14 and the second drive unit 15 are controlled and driven by the door controller 13. The first drive unit 14 includes a motor (not shown) and drives the first door 11 in the opening / closing direction by transmitting the driving force of the motor to the first door 11 via a belt (not shown). The second drive unit 15 includes a motor (not shown) and drives the second door 12 in the opening / closing direction by transmitting the driving force of the motor to the second door 12 via a belt (not shown). The door controller 13 receives a fully closed signal indicating that the first door 11 and the second door 12 are fully closed from a position sensor (not shown) that detects that the first door 11 and the second door 12 are fully closed.

[0032] The door controller 13 includes a control unit 13A and a determination unit 13B. The control unit 13A controls the opening and closing of the first door 11 and the second door 12 in response to the detection results of the area sensor 20. The control unit 13A drives and controls the first drive unit 14 to open and close the first door 11, and drives and controls the second drive unit 15 to open and close the second door 12. The detection results of the area sensor 20 are transmitted from the platform door device 5 on the left side of FIG. 1 to the platform door device 5 on the right side. In other words, each platform door device 5 controls the opening and closing of the second door 12 in response to the detection results of its own area sensor 20, and controls the opening and closing of the first door 11 in response to the detection results of the area sensor 20 installed in the platform door device 5 located adjacent to it on the left. The control unit 13A opens and closes the first door 11 and the second door 12 in response to opening and closing commands from the integrated control panel 4. If an obstacle is detected during the opening or closing of the first door 11 or the second door 12, the control unit 13A stops the driving and performs the opening and closing operation when the obstacle is no longer detected.

[0033] Incidentally, if components such as a reflecting mirror or lens located in the part of the emitting unit 21 through which light passes from the light source, or the cover covering the emitting unit 21, become dirty, light will not be emitted from the emitting unit 21 and objects will not be detected. Therefore, the platform door device 5 performs an abnormality determination process that uses the detection of the area sensor 20 to determine whether or not there is an abnormality in the emitting unit 21. The determination unit 13B determines whether or not there is an abnormality in the emitting unit 21 of the area sensor 20. Abnormalities in the emitting unit 21 include, in addition to dirt, abnormal light emission from the light source and abnormalities in the motor that rotates the reflective mirror.

[0034] The notification unit 16 notifies the determination result when the determination unit 13B determines that there is an abnormality in the emission unit 21. The determination unit 13B notifies the determination result to the general control panel 4 that controls the platform door device 5 installed on the platform 3.

[0035] (Area Sensor 20) As shown in FIG. 4, the detection area includes a monitoring area AS, which is a predetermined space on the platform 3, and a ground area AG, which is the floor surface 3A of the platform 3 and reflects light. The ground area AG is located on an extension of at least a portion of the monitoring area AS. Specifically, the monitoring area AS is set so as not to detect the floor surface 3A of the platform 3, but the ground area AG is set by extending a portion of the monitoring area AS from the area sensor 20. The ground area AG is divided into eight equal-angle areas and includes a first ground area A1 to an eighth ground area A8. The first ground area A1 to the eighth ground area A8 are each different areas. When determining whether the area sensor 20 has an abnormality, the area sensor 20 detects objects one by one from the first ground area A1 to the eighth ground area A8. When the area sensor 20 detects an object in the monitoring area AS, the control unit 13A does not drive the first drive unit 14 and the second drive unit 15, and does not open or close the first door 11 and the second door 12. Furthermore, when the area sensor 20 detects an object in the monitoring area AS while the first door 11 and the second door 12 are open or closed, the control unit 13A stops driving the first drive unit 14 and the second drive unit 15, and stops the first door 11 and the second door 12. Alternatively, the control unit 13A drives the first drive unit 14 and the second drive unit 15 in opposite directions to move the first door 11 and the second door 12 in opposite directions.

[0036] When the judgment unit 13B judges whether the area sensor 20 is abnormal, the area sensor 20 detects an object located in the ground area AG. When the area sensor 20 detects the ground area AG and no object is located in the detection area, the area sensor 20 detects the floor surface 3A of the platform 3. When the judgment unit 13B receives a fully closed signal indicating that the first door 11 and the second door 12 are fully closed, the judgment unit 13B judges whether or not there is an abnormality in the emission unit 21. When the detection result of the area sensor 20 in the ground area AG indicates that no object has been detected, the judgment unit 13B judges that there is an abnormality in the emission unit 21.

[0037] 5, when the detection results of some of the first ground area A1 to eighth ground area A8 indicate that no object is detected, the determination unit 13B determines that there is an abnormality in the reflecting mirror, lens, or cover of the emission unit 21 of the area sensor 20. FIG. 5 shows a state in which no object is detected in the third ground area A3.

[0038] Furthermore, if the detection results of the first ground area A1 to the eighth ground area A8 indicate that no object has been detected, the judgment unit 13B judges that the problem is an abnormality in the light emission of the light source other than dirt on the emission part 21 of the area sensor 20, or an abnormality in the motor that rotates the reflective mirror.

[0039] (Abnormality determination processing) Next, the abnormality determination process of the platform door device 5 will be described with reference to Fig. 6. As shown in Fig. 5, since there is dirt on the part that emits light in the third ground area A3, it is assumed that no object is detected in the third ground area A3.

[0040] 6, the area sensor 20 starts by setting "i=0" (step S1). That is, the area sensor 20 starts from i=0 in order to detect the ground areas AG one by one in order.

[0041] Next, the area sensor 20 sets "i+1=i" (step S2). That is, the area sensor 20 sets 0+1=1=i. Then, the area sensor 20 switches to the sensor area Ai (step S3). That is, the area sensor 20 switches the detection area to the first ground area A1.

[0042] Next, the area sensor 20 determines whether or not it is in a detection state in the sensor area Ai (step S4). That is, the area sensor 20 determines whether or not it has detected an object in the first ground area A1. Then, if it is determined that the area sensor 20 is in a detection state in the first ground area A1 (step S4: YES), the door controller 13 determines that there is no abnormality in the part of the emitter 21 that emits light to the first ground area A1 (step S5). That is, since the determination unit 13B can detect in the first ground area A1, it determines that there is no abnormality in the part of the emitter 21 that emits light to the first ground area A1.

[0043] Next, the area sensor 20 determines whether i is 8, which is the Max (step S6). That is, it determines whether detection has been performed in the entire ground area AG. If the area sensor 20 determines that i is not 8, which is the Max (step S6: NO), it proceeds to step S2 and sets 1 + 1 = 2 = i. Then, the area sensor 20 switches the detection area to the second ground area A2 (step S3).

[0044] Next, the area sensor 20 determines whether or not an object is detected in the second ground area A2 (step S4). If the area sensor 20 determines that an object is detected in the second ground area A2 (step S4: YES), the door controller 13 determines that there is no abnormality in the part of the emitter 21 that emits light to the first ground area A1 (step S5). In other words, the determination unit 13B can detect an object in the second ground area A2, and therefore determines that there is no abnormality in the part of the emitter 21 that emits light to the second ground area A2.

[0045] Next, the area sensor 20 determines whether i is 8, which is the Max (step S6). If the area sensor 20 determines that i is not 8, which is the Max (step S6: NO), it proceeds to step S2 and sets 2+1=3=i. Then, the area sensor 20 switches the detection area to the third ground area A3 (step S3).

[0046] Next, the area sensor 20 determines whether or not an object is detected in the third ground area A3 (step S4). If it is determined that the area sensor 20 is not in a detection state in the third ground area A3 (step S4: NO), the door controller 13 determines that there is an abnormality in the emission unit 21 (step S7). That is, the determination unit 13B determines that there is an abnormality in the emission unit 21 because it cannot detect an object in the third ground area A3.

[0047] Then, the door controller 13 outputs an abnormality of the area sensor 20 (step S8), and proceeds to step S6. That is, the door controller 13 outputs the abnormality of the area sensor 20 by at least one of sound and light from the alarm unit 16, and also outputs the abnormality to the general control panel 4.

[0048] Subsequently, the area sensor 20 determines whether i is 8, which is the Max (step S6), and repeats steps S2 to S6 until it determines that i=8, which is the Max (step S6: YES).

[0049] If the area sensor 20 determines that it is in a detection state in all ground areas AG (step S4: YES), it determines that i=8, which is the Max (step S6: YES), and ends the abnormality determination process.

[0050] Therefore, the platform door device 5 can use the detection of the area sensor 20 to grasp abnormalities in the emission part 21 of the area sensor 20. Furthermore, by dividing the detection area of ​​the emission part 21 and determining abnormalities, the detection areas through which light passes are different, and therefore it is possible to grasp abnormalities such as fine stains on the emission part 21 for each detection area through which light passes.

[0051] Next, the effects of the first embodiment will be described. (1-1) Because the area sensor 20 includes a ground area AG that detects the floor surface 3A of the platform 3, it is possible to determine whether or not there is an abnormality in the emission unit 21 of the area sensor 20. Specifically, when there is no abnormality in the area sensor 20, the floor surface 3A that reflects light is always present in the ground area AG, and therefore the determination result is that an object has been detected. Using this, when the floor surface 3A that should always be present cannot be detected, it can be assumed that there is a sensor abnormality such as dirt on the lens or cover of the emission unit 21, an abnormality in the light source, or an abnormality in the motor. Therefore, the platform door device 5 can detect an abnormality in the emission unit 21 of the area sensor 20 without providing a separate device for detecting the state of the area sensor 20.

[0052] (1-2) The ground area AG is located on an extension of at least a part of the monitoring area AS, so that it is possible to determine whether there is an abnormality in the light emitting part 21 through which light passes when detecting an object in the monitoring area AS.

[0053] (1-3) When a fully closed signal is received, the judgment unit 13B judges whether or not there is an abnormality in the emission unit 21. Therefore, when the first door 11 and the second door 12 are fully closed, no person or object passes through the entrance E, so that false detections in the detection of an abnormality in the area sensor 20 can be suppressed, and the detection accuracy can be improved.

[0054] (1-4) The notification unit 16 outputs the determination result, so that an outside person can know that there is an abnormality in the emission unit 21. (1-5) The determining unit 13B outputs the determination result to the general control panel 4, so that the general control panel 4 can know that the area sensor 20 is abnormal.

[0055] (1-6) If the detection result for a part of the ground area AG indicates that no object has been detected, it is determined that there is an abnormality due to dirt on the emission unit 21. Therefore, even if there is even a small amount of dirt on the emission unit 21, it is possible to detect an abnormality in the emission unit 21.

[0056] (1-7) If there is dirt on the emission part 21, there is a high possibility that the floor surface 3A of the platform 3 will be detected in some of the ground areas AG. Therefore, if the floor surface 3A of the platform 3 is not detected in all of the ground areas AG, it can be determined that the abnormality is not due to dirt on the emission part 21, but is due to an abnormality other than dirt on the emission part 21.

[0057] (1-8) The platform door device 5 can detect abnormalities in the emission part 21 of the area sensor 20 without providing a separate device for detecting the state of the area sensor 20 used to detect obstacles.

[0058] (Second embodiment) A second embodiment of the platform door device will be described below with reference to Figures 7 and 8. The platform door device of this embodiment differs from the first embodiment in that it is a full-height type and that an area sensor 20 detects overstaying passengers. The following description will focus on the differences from the first embodiment.

[0059] As shown in Figures 7 and 8, the platform door device 6 includes a storage box 30, a first door 31, a second door 32, a first fix 33, and a second fix 34. The storage box 30 is provided above the platform 3. The storage box 30 houses a support mechanism and a drive unit (not shown) that support the first door 31 and the second door 32 so that they can be opened and closed. The first fix 33 and the second fix 34 are fixed between the storage box 30 and the floor surface 3A of the platform 3.

[0060] The platform door device 6 is equipped with an area sensor 20. The area sensor 20 performs overstay detection, detecting objects located closer to the track 2 than the first door 31 and second door 32 on the platform 3. The area sensor 20 detects objects located between the track 2 and the first door 31 and second door 32. The area sensor 20 is installed on the back of the storage box 30 on the track 2 side. The area sensor 20 forms a monitoring area AS as a detection area between the track 2 and the first door 31 and second door 32. The configuration of the area sensor 20 is the same as in the first embodiment, so a description thereof will be omitted. The platform door device 6 is also equipped with a door controller 13, similar to the platform door device 5 of the first embodiment.

[0061] As shown in FIG. 8, the detection area includes a monitoring area AS, which is a predetermined space on the platform 3, and a ground area AG, which is the floor surface 3A of the platform 3 and reflects light. The ground area AG is located on an extension of at least a portion of the monitoring area AS. Specifically, the monitoring area AS is set so as not to detect the floor surface 3A of the platform 3, but the ground area AG is set by extending a portion of the monitoring area AS from the area sensor 20. The ground area AG is divided into eight equal-angle areas and includes a first ground area A1 to an eighth ground area A8. The first ground area A1 to the eighth ground area A8 are each different areas. When determining whether the area sensor 20 has an abnormality, the area sensor 20 detects objects one by one from the first ground area A1 to the eighth ground area A8. When the area sensor 20 detects an object in the monitoring area AS, the control unit 13A does not drive the first drive unit 14 and the second drive unit 15, and does not open or close the first door 11 and the second door 12. Furthermore, when the area sensor 20 detects an object in the monitoring area AS while the first door 11 and the second door 12 are open or closed, the control unit 13A stops driving the first drive unit 14 and the second drive unit 15, and stops the first door 11 and the second door 12. Alternatively, the control unit 13A drives the first drive unit 14 and the second drive unit 15 in opposite directions to move the first door 11 and the second door 12 in opposite directions.

[0062] The platform door device 6 performs the same abnormality determination process as the platform door device 5. That is, when the determination unit 13B determines an abnormality in the area sensor 20, the area sensor 20 detects an object located in the ground area AG. When the area sensor 20 detects the ground area AG and no object is located in the detection area, the area sensor 20 detects the floor surface 3A of the platform 3. The determination unit 13B determines whether or not there is an abnormality in the emission unit 21 when it receives a fully closed signal indicating that the first door 31 and the second door 32 are fully closed. If the detection result of the area sensor 20 in the ground area AG indicates that no object has been detected, the determination unit 13B determines that there is an abnormality in the emission unit 21. If the detection results in some of the first ground area A1 to eighth ground area A8 indicate that no object has been detected, the determination unit 13B determines that there is an abnormality due to dirt on the emission unit 21 of the area sensor 20. Furthermore, if the detection results of the first ground area A1 to the eighth ground area A8 indicate that no object has been detected, the determination unit 13B determines that something other than dirt on the emission unit 21 of the area sensor 20 is abnormal.

[0063] Next, the effects of the second embodiment will be described. In addition to the effects (1-1) to (1-7) of the first embodiment, the second embodiment has the following effects. (2-1) The platform door device 6 can detect abnormalities in the emission part 21 of the area sensor 20 without providing a separate device for detecting the state of the area sensor 20 used for detecting overstaying.

[0064] (Third embodiment) A third embodiment of the platform door device will be described below with reference to Figures 9 and 10. The platform door device of this embodiment differs from the first embodiment in that an area sensor detects railway vehicles. The following description will focus on the differences from the first embodiment.

[0065] As shown in Figures 9 and 10, the platform door device 7 is equipped with a storage box 40 that stores the area sensor 20. The storage box 40 is installed on the track 2 side, which is the rear side of the door pocket 10. The area sensor 20 forms a monitoring area AS as a detection area within a range in which it can detect railway vehicles 8 stopped at the station 1. The target is the track. The configuration of the area sensor 20 is the same as in the first embodiment, so a description thereof will be omitted. The platform door device 7 also has a door controller 13, similar to the platform door device 5 of the first embodiment.

[0066] The area sensor 20 of the platform door device 7 detects the railway vehicle 8 stopped at the station 1. By detecting the railway vehicle 8, the area sensor 20 can detect that the railway vehicle 8 has entered the station and whether the railway vehicle 8 is stopped at a stop position. In addition, by obtaining the detection results of multiple area sensors 20, the formation of the railway vehicle 8 can also be detected.

[0067] As shown in FIG. 10 , the detection area includes a monitoring area AS, which is a predetermined space on the track 2, and a ground area AG, which is the ground 9 of the track 2 and reflects light. The ground area AG is located on an extension of at least a portion of the monitoring area AS. Specifically, the monitoring area AS is set so as not to detect the ground 9 of the track 2, but the ground area AG is set by extending a portion of the monitoring area AS from the area sensor 20. The ground area AG is divided into eight equal-angle areas and includes a first ground area A1 to an eighth ground area A8. The first ground area A1 to the eighth ground area A8 are each different areas. When determining an abnormality in the area sensor 20, the area sensor 20 detects objects one by one from the first ground area A1 to the eighth ground area A8. The control unit 13A opens the first door 11 and the second door 12 only when a railroad vehicle 8 is detected in the monitoring area AS.

[0068] The platform door device 7 performs an abnormality determination process similar to that of the platform door device 5. That is, when the determination unit 13B determines an abnormality in the area sensor 20, the area sensor 20 detects an object located in the ground area AG. When the area sensor 20 detects the ground area AG and no object is located in the detection area, the area sensor 20 detects the ground surface 9 of the track 2. The determination unit 13B determines whether or not there is an abnormality in the emission unit 21 when it receives a fully closed signal indicating that the first door 31 and the second door 32 are fully closed. If the detection result of the area sensor 20 in the ground area AG indicates that no object has been detected, the determination unit 13B determines that there is an abnormality in the emission unit 21. If the detection results in some of the first ground area A1 to eighth ground area A8 indicate that no object has been detected, the determination unit 13B determines that there is an abnormality due to dirt on the emission unit 21 of the area sensor 20. Furthermore, if the detection results of the first ground area A1 to the eighth ground area A8 indicate that no object has been detected, the determination unit 13B determines that something other than dirt on the emission unit 21 of the area sensor 20 is abnormal.

[0069] Next, the effects of the third embodiment will be described. In addition to the effects (1-2) to (1-7) of the first embodiment, the third embodiment has the following effects. (3-1) Since the area sensor 20 includes the ground area AG that detects the ground surface 9 of the track 2, it is possible to determine whether or not there is an abnormality in the emission part 21 of the area sensor 20. Therefore, the platform door device 5 can detect an abnormality in the emission part 21 of the area sensor 20 without providing a separate device for detecting the state of the area sensor 20.

[0070] (3-2) The platform door device 7 can detect abnormalities in the emission part 21 of the area sensor 20 without providing a separate device for detecting the state of the area sensor 20 used for vehicle detection.

[0071] (Other embodiments) The above-described embodiments can be modified as follows: The above-described embodiments and the following modifications can be combined with each other within the scope of technical compatibility.

[0072] In each of the above embodiments, the door controller 13 of the platform door devices 5, 6, and 7 is provided with a determination unit 13B, and the determination unit 13B determines an abnormality in the area sensor 20. However, a status determination device may be provided with a determination unit in the area sensor 20. That is, as shown in FIG. 11 , the door controller 13 is provided with a control unit 13A that controls the first drive unit 14 and the second drive unit 15. The status determination device 50 is provided with the area sensor 20, a determination unit 51, and an alarm unit 52. The determination unit 51 determines an abnormality in the area sensor 20, similar to the determination unit 13B in the first embodiment. Furthermore, the alarm unit 52 outputs an abnormality in the area sensor 20 by sound, light, etc., and also outputs the abnormality to the general control panel 4.

[0073] According to the above configuration, the area sensor 20 includes the ground area AG that detects the floor surface 3A of the platform 3 and the ground 9, so it is possible to determine whether or not there is an abnormality in the emission unit 21 of the area sensor 20. Therefore, it is possible to grasp the abnormality of the area sensor 20 through detection by the area sensor 20 without providing a separate device for detecting the state of the area sensor 20.

[0074] In the above embodiments, if the floor surface 3A of the platform 3 or the ground 9 is not detected in all ground areas AG, it is determined that the abnormality is not due to dirt on the emission unit 21 but is due to something other than dirt on the emission unit 21. However, if the floor surface 3A of the platform 3 or the ground 9 is not detected in all ground areas AG, it may be determined that there is an abnormality in the emission unit 21 first.

[0075] In the above embodiments, the determination unit 13B outputs the determination result to the general control panel 4. However, if the notification unit 16 in the platform door devices 5, 6, and 7 issues a notification, the output to the general control panel 4 is not necessary.

[0076] In the above embodiments, the notification unit 16 outputs the determination result using light, sound, etc. However, as long as the determination result can be output to the general control panel 4, it is not necessary to output the result using light, sound, etc.

[0077] In the above-described embodiments, when a fully closed signal is received, it is determined whether or not there is an abnormality in the emission unit 21. However, it may be determined whether or not there is an abnormality in the emission unit 21 at a time other than when a fully closed signal is received.

[0078] In the above embodiments, the ground area AG is positioned on the extension of at least a portion of the monitoring area AS. However, the ground area AG may be positioned on the entire extension of the monitoring area AS. When the monitoring area AS is formed on the platform 3, the ground area AG can be positioned on the floor surface 3A of the platform 3 on the entire extension of the monitoring area AS. When the monitoring area AS is formed on the track 2, the ground area AG can be positioned on the ground surface 9 of the track 2 on the entire extension of the monitoring area AS.

[0079] In each of the above embodiments, the determination unit 13B may determine that there is an abnormality in the emitter 21 if the detection result of the area sensor 20 in the ground area AG differs from a reference value. Instead of transmitting the result of the area sensor 20's determination of the presence or absence of an object to the control unit 13A as in the above embodiments, the area sensor 20 may send the measured light intensity or the distance to the object measured using the TOF principle to the control unit 13A, and the control unit 13A may use these values ​​to detect the presence or absence of an obstacle or a lingering person. In this case, if the light intensity or the measured distance to the object falls below a threshold value in the monitoring area AS, it is determined that an obstacle or a lingering person has been detected. Note that the reference value is a value measured in advance before operation, such as when the platform door devices 5, 6, and 7 are installed, when no obstacles are present. With this configuration, the detection area of ​​the ground area AG where the area sensor 20 detects the target ground is included, making it possible to determine the presence or absence of an abnormality in the emitter 21 of the area sensor 20. Therefore, the platform door devices 5, 6, and 7 can detect abnormalities in the emission part 21 of the area sensor 20 without providing a separate device for detecting the state of the area sensor 20.

[0080] For example, if the intensity of light received by the light receiving unit 22 after being emitted from the emission unit 21 toward the ground area AG is smaller than a reference value, the determination unit 13B determines that there is an abnormality in the emission unit 21. If dirt adheres to the emission unit 21, the intensity of the received light decreases or the distance to the object measured using the TOF principle becomes shorter. Note that if light is reflected by the dirt, the distance to the measured object may become extremely small.

[0081] For example, if the time required for the light emitted from the emission unit 21 toward the ground area AG to be received by the light receiving unit 22 is shorter than a reference value, the determination unit 13B determines that there is an abnormality in the emission unit 21. According to this configuration, the area sensor 20 does not detect the presence or absence of an object, but rather the determination unit 13B of the platform door devices 5, 6, and 7 can determine an abnormality in the emission unit 21 based on the time required for the light receiving unit 22 to receive light, which is obtained from the area sensor 20.

[0082] In the above embodiments, the ground area AG is divided into eight areas at equal angles. However, the ground area AG may be divided at different angles instead of being divided into eight areas. Furthermore, the ground area AG may be divided into multiple areas other than eight.

[0083] In each of the above embodiments, the sliding door has one leaf. However, the door may be a double sliding door or a triple sliding door. In the above embodiments, the door pocket 10 is fixed to the platform 3, but the door pocket 10 may be installed so as to be movable on the platform 3.

[0084] In each of the above embodiments, if an object is made up of multiple objects, the multiple objects may be integrated, and conversely, if an object is made up of a single object, it may be divided into multiple objects. Regardless of whether the objects are integrated or not, it is sufficient that the object of the invention can be achieved.

[0085] In each of the above embodiments, where multiple functions are provided in a distributed manner, some or all of the multiple functions may be provided in a consolidated manner, and conversely, where multiple functions are provided in a consolidated manner, some or all of the multiple functions may be provided in a distributed manner. Regardless of whether the functions are consolidated or distributed, it is sufficient that the configuration is such that the object of the invention can be achieved. [Explanation of symbols]

[0086] AG: Ground area AS…Surveillance area E: Boarding / Alighting L…Communication line 1...Station 2…orbit 3...Platform 3A…Floor surface 4...General control panel 5...Platform door device 6...Platform door device 7...Platform door device 8...Railroad vehicles 9...ground 10...Door pocket 11... Door 1 12...Second door 13...Door controller 13A...Control unit 13B...judgment section 14...First drive unit 15...Second drive unit 16...Information Department 20...Area sensor 21...Emission part 22...Light receiving section 30...Storage box 31... Door 1 32...Second door 33...First Fix 34...Second Fix 40...Storage box 50...Status determination device 51…Judgment department 52...Information Department

Claims

1. Doors that open and close the boarding and alighting doors on the platform, an area sensor comprising an emission unit that emits light and a light receiving unit that receives the light emitted from the emission unit, the area sensor detecting the presence or absence of an object within a detection area including a monitoring area that is a predetermined space within the object and a ground area that is the ground of the object and reflects the light, the area being the platform or track as the object; a control unit that controls opening and closing of the door in accordance with the detection result of the area sensor in the monitoring area; a determination unit that determines that there is an abnormality in the emission unit when a detection result of the area sensor in the ground area indicates that the object has not been detected, the ground area includes a first ground area and a second ground area different from the first ground area; The determination unit determines that there is an abnormality due to dirt on the emission unit when the detection results of the first ground area and a part of the second ground area indicate that the object has not been detected. Platform door device.

2. Doors that open and close the boarding and alighting doors on the platform, an area sensor comprising an emission unit that emits light and a light receiving unit that receives the light emitted from the emission unit, the area sensor detecting the presence or absence of an object within a detection area including a monitoring area that is a predetermined space within the object and a ground area that is the ground of the object and reflects the light, the area being the platform or track as the object; a control unit that controls opening and closing of the door in accordance with the detection result of the area sensor in the monitoring area; a determination unit that determines that there is an abnormality in the emission unit when a detection result of the area sensor in the ground area indicates that the object has not been detected, the ground area includes a plurality of areas; The determination unit determines that there is an abnormality due to contamination of the emission unit when the detection result of at least one area among the plurality of areas indicates that the object has not been detected. Platform door device.

3. Doors that open and close the boarding and alighting doors on the platform, an area sensor comprising an emission unit that emits light and a light receiving unit that receives the light emitted from the emission unit, the area sensor detecting the presence or absence of an object within a detection area including a monitoring area that is a predetermined space within the object and a ground area that is the ground of the object and reflects the light, the area being the platform or track as the object; a control unit that controls opening and closing of the door in accordance with the detection result of the area sensor in the monitoring area; a determination unit that determines that there is an abnormality in the emission unit when a detection result of the area sensor in the ground area differs from a reference value, the ground area includes a first ground area and a second ground area different from the first ground area; The determination unit determines that there is an abnormality due to dirt on the emission unit when the detection results of the first ground area and a part of the second ground area indicate that the object has not been detected. Platform door device.

4. Doors that open and close the boarding and alighting doors on the platform, an area sensor comprising an emission unit that emits light and a light receiving unit that receives the light emitted from the emission unit, the area sensor detecting the presence or absence of an object within a detection area including a monitoring area that is a predetermined space within the object and a ground area that is the ground of the object and reflects the light, the area being the platform or track as the object; a control unit that controls opening and closing of the door in accordance with the detection result of the area sensor in the monitoring area; a determination unit that determines that there is an abnormality in the emission unit when a detection result of the area sensor in the ground area differs from a reference value, the ground area includes a plurality of areas; The determination unit determines that there is an abnormality due to contamination of the emission unit when the detection result of at least one area among the plurality of areas indicates that the object has not been detected. Platform door device.

5. The determination unit determines that there is an abnormality in the emission unit when the intensity of the light received by the light receiving unit after being emitted from the emission unit toward the ground area is smaller than the reference value. A platform door device as described in claim 3 or 4.

6. The determination unit determines that there is an abnormality in the emission unit when the time required for the light emitted from the emission unit toward the ground area to be received by the light receiving unit is shorter than the reference value. A platform door device as described in claim 3 or 4.

7. The ground area is located on an extension of at least a part of the monitoring area. A platform door device according to any one of claims 1 to 4.

8. The determination unit determines whether or not there is an abnormality in the emission unit when a full-close signal indicating that the door is fully closed is received. A platform door device according to any one of claims 1 to 7.

9. and a notification unit that notifies the determination result when the determination unit determines that there is an abnormality in the emission unit. A platform door device according to any one of claims 1 to 8.

10. When the determination unit determines that there is an abnormality in the emission unit, the determination unit notifies the determination result to a general control panel that controls the platform door device installed on the platform. A platform door device according to any one of claims 1 to 9.

11. When the detection results of the first ground area and the second ground area indicate that the object has not been detected, the determination unit determines that there is an abnormality other than dirt on the emission portion of the area sensor. A platform door device as described in claim 1 or 3.

12. The area sensor is used for obstacle detection, which detects an object located on the movement path of the door, or for overstaying detection, which detects an object located closer to the track than the door on the platform. A platform door device according to any one of claims 1 to 11.

13. an area sensor comprising an emission unit that emits light and a light receiving unit that receives the light emitted from the emission unit, the area sensor detecting the presence or absence of an object within a detection area including a monitoring area that is a predetermined space on the object and a ground area that is the ground of the object and reflects the light, the area being a platform or a track; a determination unit that determines that there is an abnormality in the emission unit when a detection result of the area sensor in the ground area indicates that the object has not been detected, the ground area includes a first ground area and a second ground area different from the first ground area; The determination unit determines that there is an abnormality due to dirt on the emission unit when the detection results of the first ground area and a part of the second ground area indicate that the object has not been detected. Status determination device.

14. an area sensor comprising an emission unit that emits light and a light receiving unit that receives the light emitted from the emission unit, the area sensor detecting the presence or absence of an object within a detection area including a monitoring area that is a predetermined space on the object and a ground area that is the ground of the object and reflects the light, the area being a platform or a track; a determination unit that determines that there is an abnormality in the emission unit when a detection result of the area sensor in the ground area indicates that the object has not been detected, the ground area includes a plurality of areas; The determination unit determines that there is an abnormality due to contamination of the emission unit when the detection result of at least one area among the plurality of areas indicates that the object has not been detected. Status determination device.

15. a detection step in which an area sensor is provided with an emission unit that emits light and a light receiving unit that receives the light emitted from the emission unit, the area sensor detecting the presence or absence of an object within a detection area including a monitoring area that is a predetermined space on the object and a ground area that is the ground of the object and reflects the light, the area being a platform or a track; a determining step of determining that there is an abnormality in the emission unit when the detection result of the area sensor in the ground area does not detect the object, the ground area includes a first ground area and a second ground area different from the first ground area; In the determining step, when the detection results of the first ground area and a part of the second ground area indicate that the object is not detected, it is determined that there is an abnormality due to dirt on the emission part. A method for determining the state of an area sensor.

16. a detection step in which an area sensor is provided with an emission unit that emits light and a light receiving unit that receives the light emitted from the emission unit, the area sensor detecting the presence or absence of an object within a detection area including a monitoring area that is a predetermined space on the object and a ground area that is the ground of the object and reflects the light, the area being a platform or a track; a determining step of determining that there is an abnormality in the emission unit when the detection result of the area sensor in the ground area does not detect the object, the ground area includes a plurality of areas; In the determining step, if the detection result of at least one area among the plurality of areas indicates that the object has not been detected, it is determined that there is an abnormality due to contamination of the emission section. A method for determining the state of an area sensor.

17. a detection step in which an area sensor is provided with an emission unit that emits light and a light receiving unit that receives the light emitted from the emission unit, the area sensor detecting the presence or absence of an object within a detection area including a monitoring area that is a predetermined space on the object and a ground area that is the ground of the object and reflects the light, the area being a platform or a track; the ground area includes a first ground area and a second ground area different from the first ground area, and when the detection results of the area sensor in the first ground area and a part of the second ground area indicate that the object has not been detected, the computer is caused to execute a determination step of determining that there is an abnormality due to dirt on the emission part. Area sensor status determination program.

18. a detection step in which an area sensor is provided with an emission unit that emits light and a light receiving unit that receives the light emitted from the emission unit, the area sensor detecting the presence or absence of an object within a detection area including a monitoring area that is a predetermined space on the object and a ground area that is the ground of the object and reflects the light, the area being a platform or a track; the ground area includes a plurality of areas, and when a detection result of the area sensor in at least one of the plurality of areas indicates that the object has not been detected, determining that there is an abnormality due to dirt on the emission unit. Area sensor status determination program.

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