TWI585029B - Fall detection device and passenger conveyor - Google Patents

Description

Fall detection device and passenger conveyor

The present invention relates to a fall detection device, and an elevator conveyor for an escalator, an electric road, and the like.

In the passenger conveyor, when the user (passenger) walks out of the passenger conveyor to the passenger exit, there is a fear of falling due to carelessness. Even if the user accidentally falls down at the boarding pass, it is usually impossible to detect the user's fall, so the improvement is needed.

In the fall detection device of the passenger conveying device proposed by the conventional invention (for example, refer to Patent Document 1), there is a scanning type distance sensor that emits laser light horizontally to the detection area to detect a fall within the scanning range. The scanning type distance sensor accumulates the angle measured by each distance, and calculates the standard deviation of the distance change and the standard deviation of the standard deviation for the data in the detection area, and when the standard deviation of the standard deviation is less than the critical value The surface size (length) of the object in the field is calculated, and the fall state is judged when the surface size (length) of the object continues to be above a critical value for a predetermined duration.

Further, in a conventional passenger conveying device (for example, refer to Patent Document 2), a safety device for a passenger conveying device is proposed, and a laser scanning sensor is disposed near a riding portion of the passenger conveying device, the laser scanning sensor On the plane coordinates Measuring the movement of the user, when the user's moving speed (the staying state information in the riding and lowering section) measured by the laser scanning sensor is less than a predetermined value, performing the warning broadcast of the voice synthesizing device, and simultaneously, when the user When the stay and the congestion are extended, the frequency and voltage of the inverter device are controlled, and the speed of the drive motor is slowed down or stopped. The safety device of the passenger conveying device utilizes a laser scanning sensor disposed near the riding and lowering portion of the passenger conveying device to establish a coordinate map of the continuous point of the surface of the detecting object (passenger), and is measured in advance After the coordinate data of the user-free state is superimposed, the coordinate data of the fixed obstacle is removed to obtain the contour data of the passenger from the current plane coordinate data map on the passenger conveyor. Then, the coordinates of the center point of the passenger are calculated from the contour data of the passenger, and the moving speed of each detecting object (passenger) is calculated, and when the moving speed of the detecting object is less than a predetermined threshold, the standing and staying of the passenger is detected, and Even if the standing and staying of the passenger is not detected, when it is detected that most of the detected objects are larger than the critical value, the crowded state of the passenger and the descending portion of the passenger conveying device can be judged.

[Patent Literature]

[Patent Document 1] JP-A-2012-36005.

[Patent Document 2] JP-A-2008-303057.

Since the fall detection device of the passenger conveying device proposed by the prior art is a floor-standing vertical or built-in type, the design of the passenger conveying device needs to be changed, so there is a problem of an increase in cost. Further, in the safety device of the conventional passenger conveying device, the detected object is detected by the laser scanning sensor. (user) outline data (shape) center point, and then measure the staying and overcrowding state according to the number of the center point and the moving speed. When the user (passenger) falls, for example, the head is near the exit and the foot is sweeping. In the case of the outside of the sighting area, the center point cannot be correctly obtained in this state, so there is a possibility that the fall cannot be detected. Further, even if the center point is obtained, since the center is outside the boarding and dropping point, there is a case where it is judged that there is no problem and no alarm is issued. Further, when the user who has fallen has moved his hand, is in a hurry, or does some small movements, since the center point of the acquired hand has moved moderately, the state of the crowd is mistaken for the state of congestion and is determined to be an appropriate traffic state, and may not be possible. The detective fell. Further, due to the long distance of the laser irradiation, a malfunction may occur due to the stay after leaving the passenger conveyor.

In order to solve the above problems, the present invention provides a fall detection device for a passenger conveyor that can be easily placed inside a skirt panel without requiring a change in design and can reliably detect a fall of a user (passenger).

The fall detection device of the present invention includes an opening portion that is disposed at a position where the detection area capable of detecting a fall is observed and extends in a horizontal direction; and a laser transmission window that is pressed by the laser light a resin plate or a glass plate material is disposed on the back surface of the opening portion to cover the opening portion; and a laser scanning sensor unit is disposed in the self-detecting region and is disposed on the back surface of the laser transmission window, wherein The laser scanning sensor unit includes: a frame having an opening corresponding to the portion of the laser transmission window; and a laser scanning type distance sensor disposed in the frame for horizontally emitting the laser light; The portion is disposed in the laser scanning type distance sensor for transmitting the laser light to the laser transmission window; the receiving portion is disposed in the laser scanning type distance sensor for receiving the reversed The laser beam that is incident back and passed through the laser transmission window; and the baffle is disposed between the transmitting portion and the receiving portion for reflecting the laser light transmitted from the transmitting portion without reaching the receiving portion.

Further, the laser scanning sensor unit comprises: a frame, in the pair The portion of the laser transmission window has an opening; the laser scanning type distance sensor is disposed in the frame for horizontally emitting the laser light; and the transmitting portion is disposed on the laser scanning type distance sensor The upper half of the top end is for transmitting the laser light to the laser transmission window; the receiving portion is disposed at the lower half of the top end of the laser scanning type distance sensor for receiving the reflected back and transmitting through the laser The laser light of the window and the horizontal baffle are disposed in a horizontal direction between the transmitting portion and the receiving portion for reflecting the laser light transmitted from the transmitting portion without reaching the receiving portion.

Further, the fall detection device of the present invention includes: an opening portion, The utility model is disposed near the entrance and exit of the skirt plate of the passenger conveying device, and can observe the position of the combing portion of the floor for the boarding and landing, and extends in the horizontal direction; the laser transmission window is made of laser light. It is composed of an acrylic resin plate or a glass plate material, and is disposed on the back surface of the opening portion so as to cover the opening portion; and the laser scanning sensor unit is provided with a protective skirt built in the back of the laser transmission window In the board, the laser scanning sensor unit comprises: a frame having an opening in a portion corresponding to the laser transmission window; and a laser scanning type distance sensor disposed in the frame for horizontal emission Laser light; the transmitting portion is disposed in the laser scanning type distance sensor for transmitting the laser light to the laser transmission window; and the receiving portion is disposed in the laser scanning type distance sensor for use Receiving laser light reflected back through the laser transmission window; and a baffle plate disposed between the transmitting portion and the receiving portion for causing the laser light transmitted from the transmitting portion to be reversed inside the skirt plate Shoot without reaching the receiving department.

Further, a frame system that removes a portion corresponding to the laser transmission window is used to cover the laser scanning type distance sensor.

Further, when the laser transmission window faces the vertical direction at an angle of 0°, the size thereof allows laser light of an angle of ±70° to penetrate.

Further, the anti-vibration bushing is connected to the scanning type distance sensor and is interposed between the bottom of the casing and the bottom of the scanning type distance sensor.

Further, the laser scanning sensor unit is fixed to the fixing portion of the passenger conveying device via the substrate.

The laser scanning sensor unit of the present invention is disposed from the detecting area in the back of the laser transmission window, and includes: a frame having an opening in a portion corresponding to the laser transmission window; and a laser scanning type The distance sensor is disposed in the frame for horizontally emitting the laser light; the transmitting portion is disposed in the laser scanning type distance sensor for transmitting the laser light to the laser transmission window; the receiving portion And being disposed in the laser scanning type distance sensor for receiving the laser light reflected back through the laser transmission window; and the baffle plate is disposed between the transmitting portion and the receiving portion for reflecting The laser light transmitted from the transmitting unit does not reach the receiving portion, and thus can be easily set without changing the design, and can reliably detect the fall of the user (passenger).

1‧‧‧ Passenger conveyor

2‧‧‧ steps

3‧‧‧ moving handrails

4‧‧‧ fence

5‧‧‧Inside floor

6‧‧‧Passing floor

7‧‧‧Comb

8‧‧‧skirt board

9‧‧‧Laser transmission window

10‧‧‧ openings

11‧‧‧ frame

12‧‧‧Laser Scanning Distance Sensor

13‧‧‧Send Department

14‧‧‧ Receiving Department

15‧‧‧ horizontal baffle

16‧‧‧Anti-vibration silicone bushing

17‧‧‧ horizontal connection plate

Fig. 1 is a front perspective view showing the overall schematic configuration of a passenger conveying device having a fall detection device according to a first embodiment of the present invention.

Fig. 2 is a front perspective view showing the passenger conveying device having the fall detection device according to the first embodiment of the present invention detecting the fall of the passenger.

Fig. 3 is a view showing the case where the incidence angle of the light passing through the transparent plate causes the transmittance to be different in the fall detection device according to the first embodiment of the present invention.

Fig. 4 is a graph showing the transmittance and reflectance of a transparent plate (refractive index of 1.5) in which laser light is polarized in the fall detection device of the first embodiment of the present invention.

Fig. 5 is a schematic diagram showing an experimental model evaluation of each maximum observation distance and angle of a Kodak Gray sheet having a reflectance of 90% and 18% in the fall detection apparatus of the first embodiment of the present invention.

Fig. 6 is a view showing measurement results of each maximum observation distance and angle of a Kodak Gray sheet having a reflectance of 90% and 18% in the fall detection device of the first embodiment of the present invention.

Fig. 7 is a plan view showing the main part of the fall detection device according to the first embodiment of the present invention.

Fig. 8 is a side elevational view showing the main part of the fall detection device according to the first embodiment of the present invention.

1 is a front perspective view showing an overall schematic configuration of a passenger conveying device having a fall detection device according to a first embodiment of the present invention, and FIG. 2 is a front perspective view showing a situation in which a passenger is detected to fall, and FIG. It is shown that the incident angle of the light passing through the transparent plate causes the transmittance to be different, and the fourth figure shows the transmittance and reflectance of the transparent plate (refractive index 1.5) considering the laser polarized light, and the fifth figure shows the reflection. 90%, 18% of Kodac Gray tablets A schematic diagram of the experimental model for estimating the maximum observation distance and angle, Figure 6 shows the measurement results of each maximum observation distance and angle, Figure 7 shows the main part of the fall detection device, and Figure 8 shows the fall detection. A side view of the main part of the device.

In Figures 1 and 2, reference numeral 1 is a passenger conveyor, Run for the downside. 2 is the step of the passenger conveying device 1, and the reference numeral 3 is a moving handrail which is respectively disposed on both sides of the step 2 and moves simultaneously with the step 2, and the reference numeral 4 is a fence and a label respectively disposed on both sides of the step 2 5 is an inner bottom plate disposed under the fence 4, and reference numeral 6 is a floor for passenger transportation of the passenger conveyor provided at the place where the passenger conveyor 1 descends to the first floor, where the passenger enters from the landing floor 6 The step 2 of the passenger conveyor 1 is either down from the step 2 of the passenger conveyor 1. Reference numeral 7 is a comb plate provided at the front end portion of the step side of the floor 6 for boarding and landing, reference numeral 8 is a skirt guard which is respectively disposed on both sides of the step 2, and a portion of the numeral 9 is attached to one of them. Near the entrance and exit of the skirting plate 8, that is, the position of the comb plate 7 at the front end portion of the floor 6 for landing, in other words, the reference numeral 9 is a laser transmission window, which is provided to be able to surely face the comb plate 7 as a whole. At the position of observation. The planar laser transmission window 9 along the skirt panel 8 does not affect the user, and is composed of a material through which laser light such as a transparent acrylic permeable resin plate and a transparent glass plate can pass through. A laser scanning sensor unit as described below is disposed inside the laser transmission window 9. In Fig. 2, when the user (passenger) falls in the passenger conveyor and is sent down to the vicinity of the board 7 of the floor 6 of the boarding and landing floor, the user stays on the board 7 in order to In order to avoid the intrusion of the user's clothes, it is necessary to observe the entire comb plate 7 and immediately find the person who falls. Further, since the laser scanning sensor is open to the patent document 1 The structure disclosed in the publication No. 2012-36005S is the same, and the detailed description is omitted here.

Figure 3 is a diagram showing the structure of the laser transmission window 9, such as laser light The incident angle of the light transmitted by the transparent transparent acrylic resin plate causes the transmittance to be different, that is, the expected measurement distance performance varies depending on the angle of the laser light. The reflectance and transmittance of light are the direction of polarization that is changed with respect to the boundary of a medium such as a transparent acrylic resin sheet. A light component that is not parallel to the boundary of the medium is referred to as a P wave, and a light component parallel to the boundary of the medium is referred to as an S wave, and in the case of obliquely polarized light, a composite wave of the P wave and the S wave is obtained. Fig. 4 is a graph showing the transmittance and reflectance of a transparent plate (refractive index of 1.5) in consideration of laser polarization. As can be seen from the figure, the transmittance of the angle of 0 to 40° is 0.96, and the angle of the angle of 80° is 0.5. Since the boundary of the medium on both sides of the transparent acrylic resin plate is twice, the round trip is four times, so the total transmittance of transmission and reception is four. The possible angle of detection can be calculated by the minimum receiving sensitivity of the laser scanning sensor. However, when the minimum receiving sensitivity is unknown, the possible angle of detection is obtained through experiments.

Figure 5 shows Kodak Gray with a reflectivity of 90% and 18%. An experimental model evaluation map of each of the maximum observed distances x[m] and angles. With the change of angle 0°~80°, the maximum distance x[m] of the 90% and 18% Gray sheets can be observed. When the vicinity of the maximum distance is exceeded, the measurement point flickers, so that the maximum distance can be stably obtained. According to the experimental results, the maximum range of the sensor can be measured to be 4 meters in the case of a 90% reflectance of the Gray sheet at an angle of 0° to 75°. Further, the measurement distance of the Gray sheet having a reflectance of 18% decreases as the angle increases, and the maximum measurement distance when the angle is 70° or more is 2.5 meters or less. The width of the passenger conveyor is about 1 meter, which means that the safety margin of 2.5 times is usually Suitable for viewing angle ± 70 °. Therefore, when the laser scanning sensor unit is placed in the skirt of the passenger conveyor, a gap is reserved to ensure a detection area having a length (width) of 1 meter. From this, it can be seen that the gap having a length (width) of 1 m can be ensured to be about 15 cm apart from the skirt surface.

Next, the architecture of the fall detection device of the present invention will be described based on Figs.

The portion of the opening portion 10 is located near the entrance and exit of one of the skirt plates 8, that is, the position of the comb plate 7 at the front end portion of the floor 6 for the landing, in other words, is set at 8 to 11 cm above the ground. The position (preferably about 10 cm) extends in the horizontal direction to enable the entire comb 7 to be observed. Then, the laser transmission window 9 is made of a material through which laser light such as a transparent acrylic resin plate or a transparent glass plate can pass, and is provided on the back surface of the opening portion 10 so as to cover the opening portion 10. Further, a warning sign window composed of a transparent acrylic resin plate and a transparent glass plate may be placed in the skirt plate 8 near the comb plate 7 of the landing board 6 and the color is displayed from the inside of the skirt panel 8. The warning sign indicates that, in this case, the passenger landing device has a riding and lowering warning indicator device for notifying the user of the relevant matters of the riding and lowering portion, and may not reset the laser transmission window 9 and use it together with the warning sign window. . Reference numeral 11 is a frame for accommodating the laser scanning sensor unit, which is disposed in the skirt 8 of the back of the transmission window 9, and has an opening portion on one side corresponding to the laser transmission window 9. . Reference numeral 12 is a laser scanning type distance sensor provided in the housing 11, and emits laser light horizontally within an angle of ±120°. Since the laser light axis is turned to the vertical direction, the sensor is measured. The horizontal distance from the center. The upper half of the inner portion of the top end of the laser scanning type distance sensor 12 is a transmitting portion 13 for transmitting the laser light to The laser transmission window 9 and the lower half of the interior of the sensor tip are receiving portions 14 for receiving the laser light reflected back through the laser transmission window 9. Here, the laser light that can penetrate the laser transmission window 9 is typically in the angular range of ±70°, and the laser transmission window 9 is sized to allow laser light of an angle of at least ±70° or more to penetrate. Further, even if it is within an angle of ±70°, there is a reflection of 5 to 30%, and the reflected light enters the inside of the skirt panel 8 and becomes stray light in the skirt 8 of the metal composition. The reception of stray light can cause problems in the observation of the presence of objects in the observation area. Therefore, in the present invention, the frame 11 for removing the portion corresponding to the laser transmission window 9 is used to cover the laser scanning type distance sensor 12, and further, the horizontal direction between the transmitting portion 13 and the receiving portion 14. The upper portion is provided with a horizontal baffle 15 for partitioning so that the laser light transmitted from the transmitting portion 13 is reflected inside the skirting plate 8 without reaching the receiving portion 14. Reference numeral 16 is a four anti-vibration silicone liner between the bottom of the housing 11 and the bottom of the laser scanning type distance sensor 12. Reference numeral 17 is a horizontal connecting plate in which the shock-proof silicone bushing 16 is centrally interconnected. Then, the laser scanning sensor unit configured as described above is fixed to a fixing portion (not shown) such as a truss of the passenger conveying device via a substrate (not shown).

Furthermore, in the first embodiment, the fall detection of the present invention is explained. The passenger conveying device to which the device is applied is not limited thereto. For example, the fall detection device of the present invention can be disposed at the lower end of the side wall of the passenger's elevator car, and then the fall detection in the elevator car is performed. It also applies to fall detection in a specific area.

8‧‧‧skirt board

9‧‧‧Laser transmission window

10‧‧‧ openings

11‧‧‧ frame

12‧‧‧Laser Scanning Distance Sensor

13‧‧‧Send Department

14‧‧‧ Receiving Department

15‧‧‧ horizontal baffle

16‧‧‧Anti-vibration silicone bushing

17‧‧‧ horizontal connection plate

Claims (7)

A fall detection device includes: an opening portion that is disposed at a position that is 8 to 11 cm higher than the ground and that is capable of observing a detection area where the fall is detected and extends in a horizontal direction; a laser transmission a window, which is composed of an acrylic resin plate or a glass plate material through which laser light can pass, is disposed on the back surface of the opening portion to cover the opening portion; and a laser scanning sensor unit is provided The detection area is hidden in the back of the laser transmission window, and the laser scanning sensor unit comprises: a frame having an opening corresponding to the portion of the laser transmission window; a laser scanning a distance sensor is disposed in the frame for emitting laser light horizontally 8 to 11 cm above the ground for detecting a fall; a transmitting portion is disposed at the laser scanning type distance sense In the detector, the laser light is sent to the laser transmission window 8 to 11 cm above the ground; a receiving portion is disposed in the laser scanning type distance sensor for off the ground 8~11 cm high reception is reflected back and passed a laser beam of the laser transmission window; and a baffle disposed between the transmitting portion and the receiving portion for reflecting the laser light transmitted from the transmitting portion without reaching the receiving portion; When the laser transmission window faces the vertical direction at an angle of 0°, its size allows laser light of ±70° angle to penetrate. A fall detection device includes: an opening portion that is disposed at a position that is 8 to 11 cm higher than the ground and that is capable of observing a detection area where the fall is detected and extends in a horizontal direction; a laser transmission a window, which is composed of an acrylic resin plate or a glass plate material through which laser light can pass, is disposed on the back surface of the opening portion to cover the opening portion; and a laser scanning sensor unit is provided The detection area is hidden in the back of the laser transmission window, and the laser scanning sensor unit comprises: a frame having an opening corresponding to the portion of the laser transmission window; a laser scanning a distance sensor is disposed in the frame for emitting laser light horizontally 8 to 11 cm above the ground for detecting a fall; a transmitting portion is disposed at the laser scanning type distance sense The upper half of the top of the detector is used to transmit the laser light to the laser transmission window 8 to 11 cm above the ground; a receiving portion is disposed under the top of the laser scanning type distance sensor Half, 8 to 11 cm above the ground Receiving laser light reflected back through the laser transmission window; and a horizontal baffle disposed in a horizontal direction between the transmitting portion and the receiving portion for reflecting the laser light transmitted from the transmitting portion, And does not reach the receiving portion; when the laser transmission window faces the vertical direction at an angle of 0°, the size is made Laser light with an angle of ±70° can penetrate. A fall detection device for a passenger conveyor includes: an opening portion disposed in the vicinity of a boarding and landing opening of a skirt panel of a passenger conveyor device in a manner of 8 to 11 cm higher than the ground, and capable of a floor for boarding and landing a portion of the comb plate that is observed and extends in a horizontal direction; a laser transmissive window is composed of an acrylic resin plate or a glass plate material through which the laser light passes, and is disposed to cover the opening portion a back surface of the opening; and a laser scanning sensor unit disposed in the skirt of the back of the laser transmission window, wherein the laser scanning sensor unit comprises: a frame a portion corresponding to the laser transmission window has an opening; a laser scanning type distance sensor is disposed in the frame for being 8 to 11 cm above the ground for detecting a fall Launching a laser beam; a transmitting portion is disposed in the laser scanning type distance sensor for transmitting laser light to the laser transmitting window 8 to 11 cm above the ground; a receiving portion Is set to the laser scanning type distance sense Inside the device for receiving laser light reflected back through the laser transmission window 8 to 11 cm above the ground; and a baffle disposed between the transmitting portion and the receiving portion for enabling The laser light transmitted from the transmitting portion is reflected inside the skirt panel without reaching the receiving portion; when the laser transmitting window faces the vertical direction at an angle of 0°, the size is made Laser light with an angle of ±70° can penetrate. A fall detection device for a passenger conveyor includes: an opening portion disposed in the vicinity of a boarding and landing opening of a skirt panel of a passenger conveyor device in a manner of 8 to 11 cm higher than the ground, and capable of a floor for boarding and landing a portion of the comb plate that is observed and extends in a horizontal direction; a laser transmissive window is composed of an acrylic resin plate or a glass plate material through which the laser light passes, and is disposed to cover the opening portion a back surface of the opening; and a laser scanning sensor unit disposed in the skirt of the back of the laser transmission window, wherein the laser scanning sensor unit comprises: a frame a portion corresponding to the laser transmission window has an opening; a laser scanning type distance sensor is disposed in the frame for being 8 to 11 cm above the ground for detecting a fall Launching a laser beam; a transmitting portion is disposed on an upper half of the top end of the laser scanning type distance sensor for transmitting laser light to the laser transmitting window 8 to 11 cm above the ground; a receiving portion, which is disposed on the laser sweep a lower portion of the top end of the distance sensor for receiving laser light reflected back through the laser transmission window 8 to 11 cm above the ground; and a horizontal baffle disposed at the transmitting portion And a horizontal direction between the receiving portions for causing the laser light transmitted from the transmitting portion to be reflected inside the skirt panel without reaching the receiving portion; When the laser transmission window is at an angle of 0° to the vertical direction, it is sized to allow laser light of an angle of ±70° to penetrate. A fall detection device for a passenger conveyor according to claim 3 or 4, wherein a frame system for removing a portion corresponding to the laser transmission window is used to cover the laser scanning type distance sensor. A fall detection device for a passenger conveyor according to claim 3 or 4, wherein the scanning type distance sensor is assembled with a shockproof bushing inserted at the bottom of the casing and at the bottom of the scanning distance sensor between. A fall detection device for a passenger conveyor according to claim 3, wherein the laser scanning sensor unit is fixed to a fixing portion of the passenger conveyor via a substrate.