JP5689089B2 - Fall detection device and passenger conveyor - Google Patents

Description

  The present invention relates to a fall detection device, and passenger conveyors such as escalators and electric roads.

  In a passenger conveyor, when a user (passenger) gets off from a passenger conveyor in operation to a boarding gate, there is a concern that the passenger conveyor may fall down accidentally. Even if a user falls down accidentally at the entrance / exit, it is usually impossible to detect the fall of the user, so that improvement is desired.

The inventors include a scanning distance sensor that emits a laser beam in a horizontal plane in a detection area that is a scanning range for detecting a fall, and the scanning distance sensor accumulates a distance for each measured angle, Calculate the standard deviation and the standard deviation of the standard deviation with respect to the change in distance over time for the data in, and if the standard deviation of the standard deviation is below the threshold, calculate the surface size (length) of the object in that area, Proposed is a passenger conveyor fall detection device that determines a fall state when the surface size (length) of the object is equal to or greater than a threshold for a predetermined duration (see, for example, Patent Document 1).
Moreover, in the conventional passenger conveyor, a laser scan sensor is installed in the vicinity of the passenger entrance and exit of the passenger conveyor, the movement of the user on the plane coordinates is measured by the laser scan sensor, and the use measured by the laser scan sensor is used. When the user's moving speed (residence status information at the boarding / alighting section) falls below a predetermined value, the voice synthesizer broadcasts an alert, and when the stay or congestion of the user is prolonged, the frequency and voltage generated by the inverter device are A safety device for a passenger conveyor has been proposed which is controlled to slow down or stop the speed of a drive motor (see, for example, Patent Document 2). This passenger conveyor safety device creates a coordinate map of continuous points on the surface of an object to be detected (passenger) by a laser scan sensor installed in the vicinity of a passenger conveyor entrance and exit, and there are no users who have been measured in advance. Overlay with the coordinate data map in the state and remove the coordinate data of the fixed obstacle, thereby obtaining the contour data of the passenger by the current plane coordinate data map on the passenger conveyor. And from the contour data of the passenger, the coordinates of the center point of the passenger are calculated, the moving speed of each detection object (passenger) is calculated, and when the moving speed of the detection object falls below a predetermined threshold, Even when the stoppage or stay of the passenger is detected, and even when the stoppage or stay of the passenger is not detected, if the detection object multiple detection threshold is exceeded, it is determined that the passenger conveyor is getting on and off.

JP 2012-36005 A JP 2008-303057 A

  Since the conventional passenger conveyor falling detection device proposed by the inventors is a floor-standing type or a post-incorporated type, it is necessary to modify the design of the passenger conveyor, which increases the cost. Moreover, in the conventional passenger conveyor safety device, the laser scanning sensor captures the center point from the captured contour data (shape) of the detection object (user), and based on the number and moving speed of the center point, When the user (passenger) falls down because the overcrowded state is measured, for example, even if the head is near the entrance / exit, the foot may be outside the scan area. In such a state, the center point is accurately In some cases, it is not required and the fall cannot be detected. Even if the center point is obtained, there is a case where it is determined that there is no problem and the alarm is not sounded, except for the entrance / exit. In addition, when a fallen user moves his hand, such as flapping or making a slight gesture, the center point is captured by the hand part, and it moves moderately. There is a possibility that the fall cannot be detected. Further, if the laser reaches far away, it may malfunction due to stay away from the passenger conveyor.

  The present invention has been made to solve the above-described problems, and can be easily installed inside the skirt guard without changing the design, and can detect the fall of the user (passenger) reliably. An apparatus and a passenger conveyor are provided.

In the fall detection device according to the present invention, an opening extending in the horizontal direction that is provided at a height of 8 to 11 cm from the floor at a position where the detection area for detecting the fall can be monitored,
Provided on the back side of the opening so as to close the opening, and is installed so as to be concealed from the detection area on the back side of the laser transmission window and a laser transmission window made of an acrylic plate or a glass plate that transmits laser light. The laser scan sensor unit is provided with a casing in which a portion corresponding to the laser transmission window is opened, and is provided in the casing, and is 8 A laser scanning distance sensor that emits laser light in a horizontal plane at a height of ˜11 cm, and a laser scanning distance sensor that is provided in the laser scanning distance sensor and transmits the laser light at a height of 8-11 cm from the floor toward the laser transmission window. a transmission unit for, provided in the laser scan type distance sensor, receiving for receiving a laser light that is reflected by the height of 8~11cm from the floor through the laser transmitting window When provided between the transmitter and receiver, and a partition plate for laser beam transmitted from the transmitter from reaching the receiver at the reflection, the laser transmissive window, a direction perpendicular to the plane 0 In this case, the size is such that the laser beam with an angle of ± 70 ° can be transmitted .

In addition, the laser scan sensor unit is provided in a case where a portion corresponding to the laser transmission window is opened, and in the case, the laser scan sensor unit emits laser light in a horizontal plane at a height of 8 to 11 cm from the floor in order to detect a fall. A laser scanning distance sensor that radiates, a transmission unit that is provided in the upper half of the upper end of the laser scanning distance sensor, and that transmits laser light at a height of 8 to 11 cm from the floor toward the laser transmission window; A receiver that is provided in the lower half of the upper end of the laser scanning distance sensor and receives laser light reflected from the floor surface to a height of 8 to 11 cm through the laser transmission window, and between the transmitter and the receiver And a horizontal partition plate that prevents the laser beam transmitted from the transmitting unit from reaching the receiving unit by reflection, and the laser transmitting window has a vertical direction of 0 ° with respect to the surface. ± 70 The size is such that laser light with an angle of ° can be transmitted .

Further, Oite is provided so as to position that can monitor comb plate portion of the passenger for floorboards in entrance near the skirt guard passenger conveyor consists of floor height of 8~11cm passengers conveyors according to the invention A horizontally extending opening, a laser transmitting window made of an acrylic plate or a glass plate which is provided on the back side of the opening so as to close the opening, and which transmits laser light; and a back side of the laser transmitting window be those with a installed laser scanning sensor unit to be concealed within the skirt guard, a laser scanning sensor unit includes a housing portion corresponding to the laser transmitting window is opened, provided in a housing is a laser scanning type distance sensor which emits laser beam to a horizontal plane at a height of 8~11cm from the floor surface to detect a fall, et al provided a laser scanning type distance sensor , Reflecting a transmission unit that transmits to the height of 8~11cm from the floor toward the laser transmitting window laser light, provided in the laser scan type distance sensor, the height of 8~11cm from the floor through the laser transmissive window A receiving unit that receives the received laser beam, and a partition plate that is provided between the transmitting unit and the receiving unit and prevents the laser beam transmitted from the transmitting unit from reaching the receiving unit by reflection inside the skirt guard. The laser transmission window is sized so that laser light having an angle of ± 70 ° can be transmitted when the direction perpendicular to the surface is 0 ° .

  Further, the laser scan type distance sensor is covered with a casing except for a portion corresponding to the laser transmission window.

  In addition, the scan type distance sensor is attached with an anti-vibration bush interposed between the bottom part in the housing and the bottom part of the scan type distance sensor.

  The laser scan sensor unit is fixed to a fixed portion of the passenger conveyor via a base plate.

  According to the present invention, the laser scan sensor unit installed so as to be concealed from the detection area on the back side of the laser transmission window is provided in the casing having a portion corresponding to the laser transmission window opened and in the casing. A laser scanning distance sensor that emits laser light in a horizontal plane; a laser scanning distance sensor that is provided in the laser scanning distance sensor; a transmitter that transmits laser light toward the laser transmission window; and a laser scanning distance sensor that is provided in the laser scanning distance sensor. Consists of a receiver that receives the laser light reflected through the transmission window, and a partition plate that is provided between the transmitter and the receiver and prevents the laser light transmitted from the transmitter from reaching the receiver by reflection. Therefore, it can be easily installed without changing the design, and the fall of the user (passenger) can be reliably detected.

It is a front perspective view which shows schematic structure of the whole passenger conveyor provided with the fall detection apparatus in Example 1 of this invention. It is a front perspective view which shows a mode that the passenger who fell by the passenger conveyor provided with the fall detection apparatus in Example 1 of this invention is detected. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram illustrating a fall detection device according to a first embodiment of the present invention, and is an explanatory diagram illustrating a state in which transmittance varies depending on an incident angle when light passes through a transparent plate. It is a graph which shows the transmittance | permeability and reflectance of the transparent plate (refractive index 1.5) which considers the polarization of a laser, explaining the fall detection apparatus in Example 1 of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram for explaining a fall detection device according to a first embodiment of the present invention, and is an explanatory diagram showing an experimental model for evaluating a maximum observation distance for each angle using a Kodac Gray sheet having a reflectance of 90% and 18%. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a graph illustrating a fall detection device according to a first embodiment of the present invention, and shows a result of measuring a maximum observation distance for each angle using a Kodac Gray sheet having a reflectance of 90% and 18%. It is a principal part top view which shows the structure of the fall detection apparatus in Example 1 of this invention. It is a principal part side view which shows the structure of the fall detection apparatus in Example 1 of this invention.

  1 is a front perspective view showing a schematic configuration of an entire passenger conveyor provided with a fall detection device in Embodiment 1 of the present invention, FIG. 2 is a front perspective view showing a state of detecting a fallen passenger, and FIG. 3 is a transparent plate. FIG. 4 is a graph showing the transmittance and reflectance of a transparent plate (refractive index 1.5) in consideration of laser polarization, and FIG. 5 is a reflection diagram. Explanatory diagram showing an experimental model for evaluating the maximum observation distance for each angle using a Kodac Gray sheet with a rate of 90% and 18%, FIG. 6 is a graph showing the result of measuring the maximum observation distance for each angle, and FIG. The principal part top view which shows the structure of a detection apparatus, FIG. 8: is a principal part side view which shows the structure of a fall detection apparatus.

  1 to 2, reference numeral 1 denotes a passenger conveyor, which is assumed to be down. 2 is a step of the passenger conveyor 1, 3 is a moving handrail provided on both sides of the step 2 and moves in synchronization with the step 2, 4 is a balustrade panel provided on both sides of the step 2, 5 is a balustrade panel 4 An inner deck board 6 provided at a lower portion is a passenger board boarding / exiting floor board installed at the entrance / exit of the first floor where the passenger conveyor 1 gets off. The passenger steps from the boarding board 6 to the passenger conveyor 1 2 and get off from step 2 of the passenger conveyor 1. 7 is a comb plate provided at the front end portion of the step board of the boarding / alighting board 6, 8 is a skirt guard provided on each side of the step 2, and 9 is a front end of the boarding board 6 near the entrance of the one skirt guard 8. This is a laser transmission window provided at a position where the part of the comb plate 7 is located, that is, the position where the entire comb plate 7 can be reliably monitored. The laser transmitting window 9 is made flat along the surface of the skirt guard 8 so as not to affect the user, and is made of a material such as a transparent acrylic plate or a transparent glass plate that transmits laser light and allows the laser to pass therethrough. A laser scan sensor unit, which will be described later, is installed inside the laser transmission window 9. FIG. 2 shows a case where a user (passenger) who has fallen in the middle of the passenger conveyor is brought to the vicinity of the comb board 7 of the first floor board 6 for getting on and off. Therefore, there is a possibility that the user will be stagnant and the user's clothing may be caught, so it is necessary to monitor the entire comb plate 7 and to find a fallen person as soon as possible. The laser scan sensor has the same configuration as that described in Japanese Patent Application Laid-Open No. 2012-36005 of Patent Document 1, and thus detailed description thereof is omitted.

  FIG. 3 shows how the transmittance varies depending on the incident angle when the laser light passes through, for example, a transparent acrylic plate that transmits the laser light, which constitutes the laser transmission window 9, and the measurement distance performance depends on the angle of the laser light. It is expected to change. The reflectance and transmittance of light vary depending on the polarization direction with respect to a medium boundary such as a transparent acrylic plate. For light, a component not parallel to the medium boundary is called a P wave, and a component parallel to the medium boundary is called an S wave. In the case of obliquely polarized light, it is treated as a combined wave of the P wave and the S wave. The graph of FIG. 4 shows the transmittance and reflectance of a transparent acrylic plate (refractive index 1.5) in consideration of laser polarization. It can be seen that the transmittance at an angle of 0 to 40 ° is 0.96, and is about 0.5 at an angle of 80 °. Since the medium boundary passes twice on both sides of the transparent acrylic plate and four times in reciprocation, the total transmission and reception is 4th power. When the minimum receiving sensitivity of the laser scan sensor is added, the detectable angle can be calculated. However, since the minimum reception sensitivity is unknown, we decided to obtain the detectable angle by experiment.

  FIG. 5 shows an experimental model for evaluating the maximum observation distance x [m] for each angle using a Kodac Gray sheet with a reflectance of 90% and 18%. The angle was changed from 0 ° to 80 °, and the maximum distance x [m] at which 90% and 18% Gray sheets could be observed was measured. The measurement point flickers when the maximum distance is exceeded, but the maximum distance that can be measured stably was determined. As a result of the experiment, in the case of a Gray sheet having a reflectance of 90%, it was possible to measure at an angle of 0 ° to 75 ° with a sensor maximum range of 4 m. In the case of a gray sheet with a reflectance of 18%, the measurement distance decreased as the angle increased, and the maximum measurement distance became 2.5 m or less at an angle of 70 ° or more. The width of the passenger conveyor is about 1 m, and it can be said that a viewing angle of ± 70 ° is generally appropriate with a safety margin of 2.5 times. Therefore, when the laser scan sensor unit was installed in the skirt guard of the passenger conveyor, a gap for securing a detection area having a length (width) of 1 m was estimated. According to this, it was found that the gap capable of securing a length (width) of 1 m was about 15 cm away from the skirt guard surface.

Next, the configuration of the fall detection device of the present invention will be described with reference to FIGS.
8 to 11 cm (preferably about 10 cm) from the floor surface in the vicinity of the entrance of the skirt guard 8 where the comb plate 7 is positioned at the tip of the board 6 for getting on and off, that is, the position where the entire comb plate 7 can be reliably monitored. An opening 10 extending in the horizontal direction so as to have a height is provided. A laser transmission window 9 made of a material that allows laser light to pass through, such as a transparent acrylic plate or a transparent glass plate, is installed on the back side of the opening 10 so as to close the opening 10. The skirt guard 8 near the comb plate 7 of the boarding board 6 for getting on and off is provided with a caution sign window made of a transparent acrylic plate, a transparent glass plate or the like, and is used by giving a colored caution sign from the inside of the skirt guard 8. In the case of a passenger conveyor equipped with a boarding / alighting part warning sign device that informs the person that it is a boarding / alighting part, the laser transmission window 9 may not be newly installed, and may also be used as a warning sign window. Reference numeral 11 denotes a housing for accommodating a laser scan sensor unit installed so as to be concealed in the skirt guard 8 on the back side of the laser transmission window 9, and a portion corresponding to the laser transmission window 9 is opened. Reference numeral 12 denotes a laser scan type distance sensor provided in the housing 11, which emits laser light in a horizontal direction within a range of ± 120 °, and rotates the optical axis of the laser light in the vertical direction to center the sensor. The horizontal distance is measured. In the laser scan type distance sensor 12, the upper half of the upper end portion constitutes a transmitter 13 that transmits laser light toward the laser transmission window 9, and the lower half of the sensor upper end portion is a laser transmission window. A receiving unit 14 is configured to receive the laser light reflected through 9. Here, the laser beam that can be transmitted through the laser transmission window 9 is in a range of approximately ± 70 °, and the laser transmission window 9 has a size that can transmit laser light having an angle of at least ± 70 ° or more. Further, even if the angle is within ± 70 °, about 5 to 30% is reflected. When the reflected light is radiated into the skirt guard 8, the skirt guard 8 is made of metal. To stray light. When this stray light is received, it is observed as if an object exists in the monitoring area, causing a problem. Therefore, in the present invention, the laser scan type distance sensor 12 is covered with the casing 11 except for the portion corresponding to the laser transmission window 9, and further, the laser beam transmitted from the transmission unit 13 is transmitted inside the skirt guard 8. A horizontal partition plate 15 that partitions the transmission unit 13 and the reception unit 14 in the horizontal direction is provided so as not to reach the reception unit 14 due to reflection. Reference numeral 16 denotes four anti-vibration gel bushes interposed between the bottom of the housing 11 and the bottom of the laser scan type distance sensor 12. Reference numeral 17 denotes a horizontal connecting plate that connects the central portions of the vibration-proof gel bush 16 to each other. And the laser scan sensor unit comprised as mentioned above is fixed to fixing parts (not shown), such as a truss of a passenger conveyor, via a base plate (not shown).

  In addition, in Example 1, although the example which applied the fall detection apparatus of this invention to the passenger conveyor was demonstrated, it does not restrict to this, For example, the fall detection apparatus of this invention is used for the lower end part of the boarding / alighting part side wall of an elevator car. It can also be applied to fall detection in specific areas, such as installing and detecting fall in an elevator car.

DESCRIPTION OF SYMBOLS 1 Passenger conveyor 2 Step 3 Moving handrail 4 Railing panel 5 Inside deck board 6 Boarding board for boarding / exiting 7 Comb board 8 Skirt guard 9 Laser transmission window 10 Opening part 11 Housing | casing 12 Laser scanning type distance sensor 13 Transmission part 14 Reception part 15 Horizontal partition Plate 16 Anti-vibration gel bush 17 Horizontal connecting plate

Claims (7)

An opening extending in the horizontal direction so as to be 8 to 11 cm above the floor at a position where the detection area for detecting a fall can be monitored;
A laser transmission window made of an acrylic plate or a glass plate that is provided on the back side of the opening so as to close the opening, and transmits laser light;
A fall detection device comprising a laser scan sensor unit installed on the back side of the laser transmission window so as to be concealed from the detection area ,
The laser scan sensor unit includes a housing in which a portion corresponding to the laser transmission window is opened, and a laser beam provided in the housing and in a horizontal plane at a height of 8 to 11 cm from the floor surface to detect a fall. Scanning type distance sensor that emits light, a transmission unit that is provided in the laser scanning type distance sensor and that transmits laser light at a height of 8 to 11 cm from the floor surface toward the laser transmission window, and the laser scanning type A distance sensor, a receiver that receives the laser beam reflected at a height of 8 to 11 cm from the floor surface through the laser transmission window, and is provided between the transmitter and the receiver; A partition plate that prevents the transmitted laser light from reaching the receiving unit by reflection ;
The fall detection device according to claim 1, wherein the laser transmission window is sized so that laser light having an angle of ± 70 ° can be transmitted when a direction perpendicular to the surface is 0 ° . An opening extending in the horizontal direction so as to be 8 to 11 cm above the floor at a position where the detection area for detecting a fall can be monitored;
A laser transmission window made of an acrylic plate or a glass plate that is provided on the back side of the opening so as to close the opening, and transmits laser light;
A fall detection device comprising a laser scan sensor unit installed on the back side of the laser transmission window so as to be concealed from the detection area ,
The laser scan sensor unit includes a housing in which a portion corresponding to the laser transmission window is opened, and a laser beam provided in the housing and in a horizontal plane at a height of 8 to 11 cm from the floor surface to detect a fall. Scanning distance sensor that emits light, and a transmission that is provided in the upper half of the upper end of the laser scanning distance sensor and that transmits laser light at a height of 8 to 11 cm from the floor toward the laser transmission window And a receiver for receiving laser light reflected at a height of 8 to 11 cm from the floor surface through the laser transmission window, provided in the lower half of the upper end of the laser scanning distance sensor, and the transmission A horizontal partition plate that is provided in a horizontal direction between the receiver and the receiver, and prevents the laser beam transmitted from the transmitter from reaching the receiver by reflection .
The fall detection device according to claim 1, wherein the laser transmission window is sized so that laser light having an angle of ± 70 ° can be transmitted when a direction perpendicular to the surface is 0 ° . An opening extending in the horizontal direction at a position where the comb board portion of the floor board for boarding / exiting can be monitored in the vicinity of the entrance / exit of the skirt guard of the passenger conveyor so as to have a height of 8 to 11 cm from the floor surface ;
A laser transmission window made of an acrylic plate or a glass plate that is provided on the back side of the opening so as to close the opening, and transmits laser light;
A passenger conveyor comprising a laser scan sensor unit installed so as to be concealed in a skirt guard on the back side of the laser transmitting window ,
The laser scan sensor unit includes a housing in which a portion corresponding to the laser transmission window is opened, and a laser beam provided in the housing and in a horizontal plane at a height of 8 to 11 cm from the floor surface to detect a fall. Scanning type distance sensor that emits light, a transmission unit that is provided in the laser scanning type distance sensor and that transmits laser light at a height of 8 to 11 cm from the floor surface toward the laser transmission window, and the laser scanning type A distance sensor, a receiver that receives the laser beam reflected at a height of 8 to 11 cm from the floor surface through the laser transmission window, and is provided between the transmitter and the receiver; A partition plate that prevents the transmitted laser light from reaching the receiving unit by reflection inside the skirt guard ;
The laser transmitting window, when the 0 ° vertical to the plane, passenger conveyors, characterized in that the laser beam at an angle of ± 70 ° is sized to pass through. An opening extending in the horizontal direction at a position where the comb board portion of the floor board for boarding / exiting can be monitored in the vicinity of the entrance / exit of the skirt guard of the passenger conveyor so as to have a height of 8 to 11 cm from the floor surface ;
A laser transmission window made of an acrylic plate or a glass plate that is provided on the back side of the opening so as to close the opening, and transmits laser light;
A passenger conveyor comprising a laser scan sensor unit installed so as to be concealed in a skirt guard on the back side of the laser transmitting window ,
The laser scan sensor unit includes a housing in which a portion corresponding to the laser transmission window is opened, and a laser beam provided in the housing and in a horizontal plane at a height of 8 to 11 cm from the floor surface to detect a fall. Scanning distance sensor that emits light, and a transmission that is provided in the upper half of the upper end of the laser scanning distance sensor and that transmits laser light at a height of 8 to 11 cm from the floor toward the laser transmission window And a receiver for receiving laser light reflected at a height of 8 to 11 cm from the floor surface through the laser transmission window, provided in the lower half of the upper end of the laser scanning distance sensor, and the transmission A horizontal partition plate that is provided in a horizontal direction between the receiver and the receiver and prevents the laser beam transmitted from the transmitter from reaching the receiver by reflection inside the skirt guard ,
The laser transmitting window, when the 0 ° vertical to the plane, passenger conveyors, characterized in that the laser beam at an angle of ± 70 ° is sized to pass through. A laser scanning type distance sensor, according to claim 3 or claim 4 passenger conveyors according is characterized in that as the cover by laser transmitting window except the portion corresponding housing. Scan type distance sensor, as claimed in any one of claims 3 to 5, characterized in that attaching interposed vibration isolating bushing between the bottom of the bottom and the scan-type distance sensor in the enclosure passenger conveyors. Laser scanning sensor unit, passenger conveyors according to any one of claims 3 to 6, characterized in that fixed to the fixing portion of the passenger conveyor through the base plate.

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