JP2020032861A - Detection system - Google Patents

Abstract

To provide a method by which safety of passengers in a platform is improved at a low cost.SOLUTION: A detection system 1 comprises a main sensor 2, a notification unit 4 and a control unit 5. An upper side area A1 which extends in a platform lengthwise direction on rails 6 and occupies a prescribed area near a platform edge end 71 is set as a detection area of the main sensor 2. The detection system 1 detects, in the upper side area A1, an on-rail train or falling of a person onto the rail 6. Thereby, the number of required sensors is decreased.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a detection system used at railway stations to improve passenger safety.

  Railroad vehicles are operated as trains between stations. The station has a platform (platform) for passengers to get on and off. Because the platform is close to the track, if the passenger on the platform is too close to the track, there is a risk of falling off the platform or contacting a moving vehicle.

  Conventionally, a safety fence has been known as a safety measure for passengers on a platform (for example, see Patent Document 1). This safety fence prevents a passenger from falling off the platform or coming into contact with a moving vehicle when the rope as a fence is raised and lowered and the rope is lowered.

  A track approach warning system is known as a safety measure at a station where there are relatively few passengers (for example, see Patent Document 2). This orbit approach warning system warns when a passenger on the platform is too close to the orbit. This approach warning system is less costly than a safety fence because it has no moving fences. However, this track approach warning system requires the housing to be erected on the platform, and requires a vehicle detection unit that detects vehicle entry, on-rail stop, and departure separately from sensors that detect people. Therefore, a cost-reducing safety measure has been desired.

JP 2013-199225 A JP-A-2006-94027

  The present invention has been made to solve the above problem, and has as its object to improve the safety for passengers at home at low cost.

  The detection system of the present invention is a system used in a railway station, and is a main sensor for detecting an object on a track close to a platform, a notification unit for notifying an alarm, and based on an output of the main sensor. And a control unit for controlling the notification unit.The detection area of the main sensor includes an upper area extending in the longitudinal direction of the home above the track and set in a predetermined range near the home edge. The unit has a track detection function of detecting that the train is on the track close to the platform, and a track fall detection function of detecting that a person has fallen on the track, and in the track detection function, When the duration of detection in the upper area is equal to or longer than a predetermined on-line detection time, the control unit determines that the train is on the upper area, and in the track fall detection function, When the duration of detection with rear is within a predetermined upper orbit fall detection time width, the control unit determines that a person has fallen into the orbit in the upper area, and causes the notification unit to notify an alarm. Features.

  The detection system of the present invention further includes a second sensor for detecting a person on the platform, and a detection range of the second sensor extends in a longitudinal direction of the platform on the platform and is set to a predetermined distance from an edge of the platform. A home end area, wherein the control unit controls the notification unit based on the outputs of the main sensor and the second sensor, and detects a person approaching the home edge. Further comprising a door pinch detection function of detecting that a person is pinched by a vehicle door, in the platform end approach detection function, the control unit does not determine that the train is on the train, And, when the continuation time of detection in the home edge area is equal to or longer than a predetermined home edge proximity detection time, it is determined that a person has approached the home edge in the home edge area, and an alarm is notified to the notification unit. , In the door pinch detection function, the control unit determines that the train is on the train, and when the duration of detection in the platform end area is equal to or longer than a predetermined door pinch detection time, It is preferable that it is determined that a person has been caught in the door of the vehicle in the end area, and the notification unit issues an alarm.

  In this detection system, the main sensor emits a laser beam for detection downward, scans the emitted laser beam on a first scanning surface parallel to the home longitudinal direction, and the second sensor performs detection. For emitting laser light downward, scanning the emitted laser light on a second scanning surface parallel to the home longitudinal direction, the upper area is set on the first scanning surface, and the home end area is , Is preferably set on the second scanning plane.

  In this detection system, as a detection range of the main sensor, a lower area extending in the home longitudinal direction above the track and set to a predetermined height range near the track upper surface is further provided on the first scanning surface. In the orbit fall detection function, when the duration of detection in the lower area is equal to or longer than a predetermined lower orbit fall detection time, the control unit determines that a person has fallen into the orbit in the lower area. Then, it is preferable to make the notifying unit notify a warning.

  In this detection system, it is preferable that the detection range of the main sensor includes a plurality of the upper areas divided in a longitudinal direction of the home.

  In this detection system, it is preferable that the detection range of the second sensor includes a plurality of home end areas partitioned in a home longitudinal direction.

  ADVANTAGE OF THE INVENTION According to the detection system of this invention, since it detects that a person has fallen into a track and alert | reports an alarm, the safety | security to the passenger in a platform can be improved. In addition, a sensor that detects that a person has fallen on the track detects that the train is on the train, so that the cost of the detection system is reduced.

FIG. 1 is a block configuration diagram of a detection system according to an embodiment of the present invention. FIG. 2 is an elevation view showing an arrangement of sensors in the system. FIG. 4 is an elevation view showing on-rail detection in the system. FIG. 3 is an elevation view showing track fall detection in the same system. FIG. 2 is an elevation view showing a home end approach detection in the system. FIG. 2 is an elevation view showing the detection of a pinch in the system. FIG. 2 is a plan view showing a detection range of a sensor in the same system.

  A detection system according to an embodiment of the present invention will be described with reference to FIGS. The detection system 1 is a system used at a railway station, and includes a main sensor 2, a second sensor 3, a notification unit 4, and a control unit 5, as shown in FIG. As shown in FIG. The main sensor 2 is a sensor for detecting an object on the track 6 near the platform 7. The second sensor 3 is a sensor for detecting a person on the platform 7. The notification unit 4 notifies an alarm. The control unit 5 controls the notification unit 4 based on the outputs of the main sensor 2 and the second sensor 3.

  As a detection range of the main sensor 2, there is an upper area A1. The upper area A1 extends in the longitudinal direction of the home (a direction orthogonal to the paper surface of FIG. 2) above the track 6, and is set in a predetermined range near the home edge 71. The detection range of the second sensor 3 includes a home end area A2. The home end area A2 extends in the home longitudinal direction on the home 7 and is set at a predetermined distance d from the home edge 71. In the present embodiment, the predetermined distance d is about 100 mm, and is not limited to this value, and may be, for example, 50 mm or 200 mm.

  The main sensor 2 emits a laser beam for detection downward, and scans the emitted laser beam on a first scanning surface 21 parallel to the home longitudinal direction. The second sensor 3 emits a laser beam for detection downward, and scans the emitted laser beam on a second scanning surface 31 parallel to the home longitudinal direction. The upper area A1 is set on the first scanning plane 21. The home end area A2 is set on the second scanning plane 31. When the height range is not limited, the home end area A2 is the entire second scanning surface 31.

  As a detection range of the main sensor 2, a lower area A <b> 3 extending in the home longitudinal direction above the track 6 and set at a predetermined height range near the upper surface of the track 6 is further on the first scanning surface 21.

  The control unit 5 has a on-rail detection function, a track fall detection function, a home end approach detection function, and a door pinch detection function. The on-rail detection function is a function of detecting that a train is on the track 6 near the platform 7. The track fall detection function is a function of detecting that a person has fallen on the track 6. The home edge approach detection function is a function of detecting that a person has approached the home edge 71. The door pinch detection function is a function of detecting that a person is pinched by the door of the vehicle.

  As shown in FIG. 3, in the on-rail detection function, when the duration of detection in the upper area A1 is equal to or longer than a predetermined on-rail detection time, the control unit 5 determines that the train 8 is on the upper area A1. judge. The predetermined on-line detection time is, for example, 1 second.

  As shown in FIG. 4, in the orbit fall detection function, when the duration of the detection in the upper area A1 is within a predetermined upper orbit fall detection time width, the control unit 5 moves the person 9 to the orbit in the upper area A1. It is determined that the (solid line) has fallen, and the notification unit 4 is notified of an alarm. The predetermined upper orbit fall detection time width is, for example, 0.1 seconds or more and less than 1 second.

  In the orbit fall detection function, when the duration of detection in the lower area A3 is equal to or longer than a predetermined lower orbit fall detection time, the control unit 5 places the person 9 (two-dot chain line) on the orbit 6 in the lower area A3. ) Is determined to have fallen, and the notification unit 4 is notified of an alarm. The predetermined lower orbit fall detection time is, for example, 0.2 seconds.

  As shown in FIG. 5, in the home end approach detection function, the control unit 5 does not determine that the train is on the train and the duration of detection in the home end area A2 is a predetermined home end approach time. If it is longer than the detection time, it is determined that the person 9 has approached the home edge 71 in the home edge area A2, and the alarm unit 4 is notified of an alarm. The predetermined home edge approach detection time is, for example, 0.5 seconds.

  As shown in FIG. 6, in the door-jam detection function, the control unit 5 determines that the train 8 is on the train, and the duration of the detection in the platform end area A2 is a predetermined door-jam detection time. At this time, it is determined that the person 9 has been caught in the door of the vehicle in the home end area A2, and the notification unit 4 is notified of an alarm. The predetermined door jam detection time is, for example, 0.1 second.

  The detection range of each sensor will be described. As shown in FIG. 7, the detection range of the main sensor 2 includes a plurality of upper areas A1 divided in the longitudinal direction of the home. The detection range of the second sensor 3 includes a plurality of home end areas A2 divided in the home longitudinal direction.

  For example, a train 8 is on the track 6. The formation of the train 8 is composed of vehicles 81, 82, 83 and the like. The length of one of the conventional lines is about 20 m. In the present embodiment, two main sensors 2 and two second sensors 3 are provided for the vehicles 81, 82, and 83, respectively. The detection range of the main sensor 2 is 30 m in the home longitudinal direction, and three areas can be set. As a detection range of one main sensor 2, there are two upper areas A1-11 and A1-12 and one lower area A3-1. As another detection range of the main sensor 2, there are two upper areas A1-21 and A2-22 and one lower area A3-2. Similarly, the detection range of the second sensor 3 is 30 m in the longitudinal direction of the home, and three areas can be set. As detection ranges of one second sensor 3, there are three home end areas A2-11, A2-12, and A2-13. As another detection range of the second sensor 3, there are three home end areas A2-21, A2-22, and A2-23. Note that this is an example, and the lengths of the detection ranges of the main sensor 2 and the second sensor 3 are not limited to 30 m, and the number of settable areas is not limited to three.

  The detection system 1 will be described in more detail. In the present embodiment, the main sensor 2 is a two-dimensional scanning optical distance sensor (two-dimensional sensor) (see FIG. 2). The two-dimensional scanning optical distance sensor scans a laser beam on a plane, measures a distance to an object on the plane, and detects an object having a predetermined size or more on the plane. The light emitted from the two-dimensional scanning optical distance sensor is an infrared laser light. The distance is measured by an optical time-of-flight ranging method based on the time of flight of light. The second sensor 3 is a two-dimensional scanning optical distance sensor. The second sensor 3 detects an object or the like by comparing data measured by the two-dimensional scanning optical distance sensor with data when no person is present, and calculates the position of the detected object from the light emitting direction and the measured distance. Then, it is determined whether or not the detected object is a person based on the size of the detected object.

  The main sensor 2 is attached to the lower surface side of the shed 72 of the platform 7. The pillar 73 of the home 7 may be provided with a beam or arm, and the main sensor 2 may be provided on the beam or the like. The optical axis of the main sensor 2 is set to be inclined toward the track with respect to immediately below in a cross section perpendicular to the longitudinal direction of the home. The main sensor 2 causes the emitted laser light to hit the train when the train is on the train (see FIG. 3), and to pass near the home edge 71 when the train is not on the train (see FIG. 3). 2), the inclination θ of the optical axis is set. The main sensor 2 scans the emitted laser light in the home longitudinal direction. The scanning plane is a plane. The scanning surface of the main sensor 2 is the first scanning surface.

  The upper area A1 is set by firmware of the main sensor 2. The upper area A1 is a predetermined range near the home edge 71 in a sectional view on the first scanning plane, and extends in the home longitudinal direction in a plan view. The upper area A1 detects a train that is on the train (see FIG. 3) when the train is on the train, and detects a person who falls from the platform 7 to the track when the train is not on the train (see FIG. 4). See) Height range is set. It is desirable that the length of the upper area A1 in the longitudinal direction of the home be equal to or longer than the length of one vehicle. Usually, since a train is composed of a plurality of vehicles, a plurality of main sensors 2 are arranged in the longitudinal direction of the platform according to the train length.

  The lower area A3 is set by firmware of the main sensor 2. The lower area A3 has a predetermined height range near the upper surface of the track 6 in a cross-sectional view on the first scanning plane, and extends in the home longitudinal direction in a plan view. The height range of the lower area A3 is set so as to detect a person lying on the track 6. It is desirable that the length of the lower area A3 in the longitudinal direction of the home be equal to or longer than the length of one vehicle. A plurality of second sensors 3 are arranged in the longitudinal direction of the platform corresponding to the train length.

  The second sensor 3 is attached to the lower surface side of the shed 72 of the platform 7. A beam or arm may be provided on the pillar 73 of the home 7, and the second sensor 3 may be provided on the beam or the like. The optical axis of the second sensor 3 is set directly below in a cross section perpendicular to the longitudinal direction of the home. The second sensor 3 scans the emitted laser light in the home longitudinal direction. The scanning plane is a plane. The scanning surface of the second sensor 3 is the second scanning surface. 2 to 6, the second sensor 3 is mounted closer to the home edge (closer to the track) than the main sensor 2, but the main sensor 2 is mounted closer to the home edge than the second sensor 3. You may.

  The home end area A2 is set by firmware of the second sensor 3. The home end area A2 is on the second scanning plane, is at a predetermined distance d from the home edge 71 on the home in cross-sectional view, and extends in the home longitudinal direction in plan view. The predetermined distance d is set so that the vehicle of the train 8 on the line does not enter the platform end area A2, and the person 9 sandwiched between the doors of the vehicle enters (see FIG. 6). If the predetermined distance d is too small, the vehicle enters the home end area A2 due to the vehicle shaking or the like, and erroneous detection occurs. If the predetermined distance d is too large, the person 9 caught between the doors of the vehicle cannot be detected without entering the home end area A2. The height range of the home end area A2 is higher than the upper surface of the home 7. The height range of the home end area A2 may be set to an upper limit of about the height of a person.

  Note that a three-dimensional sensor may be used as the main sensor and the second sensor, and the main sensor and the second sensor may be shared by one sensor. By using a three-dimensional sensor, the direction of the optical axis in a cross section perpendicular to the longitudinal direction of the home becomes variable. In the present embodiment, a two-dimensional scanning optical distance sensor (two-dimensional sensor) is used. Since the two-dimensional scanning optical distance sensor has a larger detectable distance than the three-dimensional sensor, the number of sensors can be reduced. The small number of sensors reduces initial and maintenance costs. Further, the two-dimensional scanning optical distance sensor is lower in cost than the three-dimensional sensor.

  The notification unit 4 notifies a warning to a train staff or a person on the platform by light, character display, voice, or the like using a lamp, a display, a speaker, or the like (see FIG. 1). The train clerk to be notified is, for example, a station clerk, a conductor of a train, or a supervisor when a platform is monitored from a distance. The notification unit 4 issues a warning so that the detected type (track fall, approaching the home end, closing the door) and the detected area (see FIG. 7) can be known. The notification unit 4 is connected to the control unit 5 by wire or wirelessly (see FIG. 1).

  The control unit 5 has a CPU, a memory, and the like, and operates by executing a program. The control unit 5 is also called a control panel because it is housed in a panel and installed at a station. The control unit 5 executes a program based on inputs from the main sensor 2 and the second sensor 3 to provide an on-rail detection function, a track fall detection function, a home end approach detection function, and a door jam detection function. .

  In the on-rail detection function, the on-rail detection time is a time set in the upper area A1 of the main sensor 2 to detect a vehicle of the on-train train 8 (see FIG. 3). The on-line detection time is adjusted by conducting a field test or the like.

  In the orbit fall detection function, the upper orbit fall detection time width is a time width set for detecting that the person 9 has fallen into the orbit 6 in the upper area A1 of the main sensor 2 (see FIG. 4). It is desirable that the upper trajectory fall detection time width does not overlap with the on-rail detection time. The upper orbit fall detection time width is adjusted by conducting a field test or the like.

  In the orbit fall detection function, the lower orbit fall detection time is a time width set for detecting that the person 9 has fallen into the orbit 6 in the lower area A3 of the main sensor 2. The lower track fall detection time is adjusted by conducting field tests and the like.

  In the home edge approach detection function, the home edge approach detection time is a time set for the second sensor 3 to detect that the person 9 has approached the home edge 71 in the home edge area A2 (FIG. 5). reference). The home end approach detection time is adjusted by conducting a field test or the like.

  In the door pinch detection function, the door pinch detection time is a time set by the second sensor 3 to detect that the person 9 has been pinched by the door of the train 8 in the platform end area A2 (FIG. 6). The door entrapment detection time is adjusted by conducting a field test or the like. In the present embodiment, the door jam detection function does not assume that the door of the vehicle is closed. The fact that the doors of the vehicle were closed is because the railway staff can visually check. When the notification unit 4 notifies that the person 9 has been pinched by the vehicle door with the vehicle door open, the railway staff may ignore the alarm. By not making the condition that the door of the vehicle is closed, the detection system 1 has high reliability and low cost because the configuration is simplified.

  As described above, according to the detection system 1 according to the present embodiment, it is detected that the person 9 has fallen on the track 6, approached the platform edge 71, and caught between the doors of the train 8 vehicle. Since the warning is issued, the safety of the passenger at the platform 7 can be improved. In addition, the main sensor 2 that detects that the person 9 has fallen on the track 6 also detects that the train is on the train, so that the cost of the detection system 1 is reduced.

  Since the second sensor 3 that detects that the person 9 has approached the home edge 71 also detects that the person 9 has been caught in the door of the vehicle, the cost of the detection system 1 is reduced.

  Each of the main sensor 2 and the second sensor 3 emits a laser beam for detection downward and scans the emitted laser beam on a plane parallel to the home longitudinal direction, so that a three-dimensional sensor is used. The cost of the detection system 1 becomes lower than that.

  In the track fall detection function, since the upper area A1 near the home edge and the lower area A3 near the track upper surface, the person 9 who has fallen on the track 6 without passing through the upper area A1 is detected in the lower area A3. can do.

  By dividing the upper area A1 in the longitudinal direction of the home, it is easy to specify the detected position.

  By dividing the home end area A2 in the home longitudinal direction, it is easy to specify the detected position.

  The present invention is not limited to the configuration of the above embodiment, and various modifications can be made without departing from the spirit of the invention. For example, the detection range of the main sensor 2 may include a plurality of lower areas A3 divided in the longitudinal direction of the home. Further, as a detection range of the main sensor 2, there may be an intermediate area of a height range intermediate between them, in addition to the upper area A1 and the lower area A3. Further, the second sensor 3 and its home end area A2 may be omitted.

Reference Signs List 1 detection system 2 main sensor 21 first scanning surface 3 second sensor 31 second scanning surface 4 notification unit 5 control unit A1 upper area A2 home end area A3 lower area

Claims (6)

A detection system used at railway stations,
A main sensor for detecting objects in orbit close to the home;
A notification unit for notifying an alarm;
A control unit that controls the notification unit based on the output of the main sensor,
As the detection range of the main sensor, there is an upper area extending in the home longitudinal direction above the track and set in a predetermined range near the home edge,
The control unit has an on-rail detection function of detecting that the train is on the track close to the platform, and a track fall detection function of detecting that a person has fallen on the track,
In the on-rail detection function, when the duration of detection in the upper area is equal to or longer than a predetermined on-rail detection time, the control unit determines that the train is on the upper area,
In the orbit fall detection function, when the duration of detection in the upper area is within a predetermined upper orbit fall detection time width, the control unit determines that a person has fallen into the orbit in the upper area, A detection system characterized by causing a notification unit to notify a warning. A second sensor for detecting a person on the platform,
As the detection range of the second sensor, there is a home end area extending in the home longitudinal direction on the home and set at a predetermined distance from the home edge,
The control unit controls the notifying unit based on the outputs of the main sensor and the second sensor to detect a person approaching the edge of the platform. Further has a door jam detection function of detecting that
In the platform end approach detection function, the control unit does not determine that the train is on the train, and when the duration of detection in the platform end area is equal to or longer than a predetermined platform end approach detection time It is determined that a person has approached the home edge in the home edge area, and the notification unit is notified of an alarm,
In the door pinch detection function, the control unit determines that the train is on the train, and, when the duration of detection in the platform end area is equal to or longer than a predetermined door pinch detection time, the home 2. The detection system according to claim 1, wherein it is determined that a person has been caught in a door of the vehicle in the end area, and the alarm is notified by the notification unit. 3. The main sensor emits a laser beam for detection downward, scans the emitted laser beam on a first scanning surface parallel to the home longitudinal direction,
The second sensor emits laser light for detection downward, scans the emitted laser light on a second scanning surface parallel to the home longitudinal direction,
The upper area is set on the first scanning plane,
The detection system according to claim 2, wherein the home end area is set on the second scanning plane. As a detection range of the main sensor, a lower area extending in the home longitudinal direction above the track and set in a predetermined height range near the track upper surface is further on the first scanning plane,
In the track fall detection function, when the duration of detection in the lower area is equal to or longer than a predetermined lower track fall detection time, the control unit determines that a person has fallen into the track in the lower area. The detection system according to claim 3, wherein the alarm is notified to the notification unit.   The detection system according to claim 3 or 4, wherein the detection range of the main sensor includes a plurality of the upper areas divided in a longitudinal direction of the home. The detection system according to any one of claims 3 to 5, wherein the detection range of the second sensor includes a plurality of the home end areas partitioned in a home longitudinal direction.

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