Escalator speed detection system

Abstract

The utility model discloses an escalator speed detection system, which relates to the technical field of detection equipment, and comprises a connecting part and lengthening assemblies, the lengthening assemblies comprise a left lengthening assembly, a right lengthening assembly and a front lengthening assembly, and the lengthening assemblies are all connected with the connecting part. Any lengthening assembly comprises a lengthening part and a camera, one end of the lengthening part is connected with the camera, and the other end of the lengthening part is connected with the connecting part; a shielding structure is arranged on the camera, and a photosensitive part of the camera is a narrow slit lens; the system further comprises line-shaped markers, and the line-shaped markers are arranged on handrails and stairs of the escalator. By arranging the left variable-length assembly, the right variable-length assembly and the front variable-length assembly, detection of speed synchronism among the left handrail, the right handrail and the stairs is achieved. The narrow-slit lens directly faces and is close to the linear marker, so that the recognition process is instantaneous and convenient, and the system has the advantages of high detection precision and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to an escalator speed detection system. Background Art

[0002] Automatic escalators (abbreviated as escalators) are widely used in shopping malls, stations and other places, providing great convenience for people to move up and down in space. The escalator is composed of handrails on the left and right sides and steps in the middle. The asynchronous speed of the handrails and steps may cause the passengers to fall and cause public safety accidents. Therefore, the detection of the speed synchronization between the left and right handrails and steps in the escalator has a strong practical significance.

[0003] Traditional detection methods mainly use contact speed measurement methods such as friction wheels. During the test of this method, the friction wheel rolls on the steps and handrails, and the running speed is obtained by multiplying the angular velocity of the friction wheel by its radius. When the positive pressure between the friction wheel and the handrail or step is too large, the friction wheel may jump. At the same time, the metal stripes on the step will also cause the surface wear of the friction wheel to increase, thereby reducing the radius of the friction wheel, causing measurement errors. When the positive pressure between the friction wheel and the handrail or step is too small, the friction wheel may slip, which will also cause measurement errors. There is usually a certain deviation between the measurement results of different staff. Therefore, the speed measurement accuracy of the friction wheel depends largely on the positive pressure of the friction surface and the subjective operating experience of the staff. In addition to the contact speed measurement method of the friction wheel, there is also a non-contact measurement method such as the laser rangefinder. When the laser rangefinder and the reflector are used to measure the running speed of a linear moving object, its measurement accuracy is relatively high. However, the trajectory of many handrails or steps running in space is a spatial curve formed by the tangent of the horizontal line and the inclined straight line. It is difficult for the laser rangefinder to meet the high-precision measurement requirements of this scenario. Image recognition technology is rarely used in escalator synchronization detection. It is mainly used for real-time safety monitoring and early warning of escalators, such as Chinese patents CN218174352U, CN111797759A, CN111062238A, etc.

[0004] Therefore, existing technicians have tried to improve it. For example, Chinese patent CN108052991A discloses a method for detecting the running speed of an escalator handrail, which adopts the method of pasting a QR code on the handrail and then using a detector to detect the QR code to calculate its speed. However, the pasted QR code may get stuck when entering the interior of the escalator, causing the entire elevator to malfunction. Due to the presence of a comb plate structure at the end of the step, this method cannot be used to synchronously measure the running speed of the step, resulting in the method being unable to complete the detection of the synchronization of the running speed between the handrail and the step. At the same time, the existing fluency and time hysteresis of scanning the code are difficult to support this method, which ultimately directly leads to the difficulty of applying this method in production practice. Utility Model Content

[0005] In order to solve at least one of the above problems, the utility model proposes an escalator speed detection system.

[0006] The technical solution of the utility model is: an escalator speed detection system, characterized in that it includes a connecting part and a variable length component, the variable length component includes a left variable length component, a right variable length component and a front variable length component, and the variable length components are all connected to the connecting part, any variable length component includes a variable length part and a camera, one end of the variable length part is connected to the camera, and the other end is connected to the connecting part; a shielding structure is provided on the camera and the photosensitive part of the camera is a slit lens; the system also includes a linear marker, and the handrails and steps of the escalator are provided with linear markers; when in use, any camera is facing and close to a linear marker at a certain moment.

[0007] Furthermore, a control component is provided on the connecting portion, and the control component includes a single-chip microcomputer, a human-computer interaction interface and a data input port, and the single-chip microcomputer is connected to the camera via a data cable.

[0008] Furthermore, the variable-length component is provided with a cable receiver, the cable receiver is provided with the data cable, and the data cable connects the camera and the data input port.

[0009] Preferably, the cable take-up device comprises a reel and a drum, the drum can rotate around the reel, a spiral spring is provided between the reel and the drum, and the data cable is connected via the reel and wound around the outer wall of the drum.

[0010] Furthermore, the variable length portion is a telescopic rod, a folding rod, or a rotating rod.

[0011] Furthermore, the rotating joint is provided at one end of the left variable length portion, the right variable length portion and the front variable length portion away from the connecting portion.

[0012] Furthermore, the camera can be rotated via the rotating joint.

[0013] Furthermore, the linear marker is a colored coating, the color of the colored coating is different from the color of the handrail and the step and is easy to remove.

[0014] Furthermore, the connecting portion is a box body, a handle is provided on the box body, and one end of the variable length portion is arranged inside the box body.

[0015] The beneficial effects of the utility model are as follows: by drawing a linear marker instead of pasting a QR code, it is possible to measure the speed of the steps, thereby realizing the synchronization of the speeds of the left (right) handrail and the steps. The system uses image recognition technology based on a narrow slit lens to replace the traditional friction wheel speed measurement method. The detection process is simple to operate, and the dependence on the subjective operation experience of the detection personnel is reduced, avoiding the problem that the accuracy of the friction wheel speed measurement is easily affected by the subjective factors of the operator. At the same time, the recognition technology of the narrow slit lens facing and close to the linear marker is instantaneous and convenient, which makes the system have the advantages of high detection accuracy and high work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of an escalator speed detection system according to an embodiment of the utility model;

[0017] Figure 2 A schematic diagram of a connecting portion of an embodiment of the utility model;

[0018] Figure 3 A schematic diagram of a camera and a variable length component according to an embodiment of the utility model;

[0019] Figure 4 A schematic diagram of a data cable and a cable receiver according to an embodiment of the utility model;

[0020] Figure 5 A schematic diagram of a variable length portion of an embodiment of the utility model;

[0021] Figure 6 A schematic diagram of a front camera image of an embodiment of the utility model;

[0022] Figure 7 It is a schematic diagram of the right wire take-up device of an embodiment of the utility model.

[0023] 1 is a connection part, 101 is a suitcase, 102 is a control component, 10201 is a human-computer interaction interface, 10202 is a single-chip microcomputer and 10203 is a data input port;

[0024] 2 is a variable length component, 201 is a camera, 20101 is a left camera, 20102 is a right camera, 20103 is a front camera, 2010301 is a shielding structure, 2010302 is a slit lens, 202 is a variable length portion, 20201 is a left variable length portion, 2020101 is a left guide rail, 2020102 is a left slide groove, 2020103 is a left rotating joint, 20202 is a right variable length portion, 2020201 is a right guide rail, 2020202 is a right slide groove, 2020203 is a right rotating joint, 20203 is a front variable length portion, 202 0301 is the front telescopic rod, 2020302 is the middle telescopic rod, 2020303 is the rear telescopic rod, 2020304 is the front rotating joint, 2020305 is the middle rotating joint, 203 is the data cable, 20301 is the left data cable, 20302 is the right data cable, 20303 is the front data cable, 204 is the wire take-up device, 20401 is the left wire take-up device, 20402 is the right wire take-up device, 2040201 is the reel, 2040202 is the reel, 2040203 is the volute spring, 2040204 is the strip wall surface, and 20403 is the front wire take-up device;

[0025] 3 is a linear marker, 4 is a handrail, and 5 is a step. DETAILED DESCRIPTION

[0026] The specific implementation methods of the present invention will be clearly and completely described below in conjunction with examples and drawings. Obviously, the described examples are only part of the embodiments of the present invention, rather than all of the embodiments.

[0027] See also Figure 1 to Figure 3 An escalator speed detection system includes a connecting part 1 and a variable-length component 2, wherein the connecting part 1 includes a suitcase 101 and a control component 102, the variable-length component 2 includes a camera 201, a variable-length part 202, a data cable 203 and a cable receiver 204, and the variable-length components 2 are all connected to the connecting part 1, and the variable-length components 2 are distributed on the left side, right side and front side of the connecting part 1, one end of the variable-length part 202 is connected to the camera 201, and the other end is connected to the connecting part 1, and the variable-length part 202 can complete telescopic movement relative to the suitcase 101, and the system also includes a linear marker 3, and the linear marker 3 is arranged on a handrail 4 and a step 5.

[0028] Specifically, the control component 102 includes a human-computer interaction interface 10201, a single-chip microcomputer 10202, and a data input port 10203. The camera 201 includes a left camera 20101, a right camera 20102, and a front camera 20103. The variable length portion 202 includes a left variable length portion 20201, a right variable length portion 20202, and a front length portion 20203. The data line 203 includes a left data line 20301, a right data line 20302, and a front data line 20303. The wire collector 204 includes a left wire collector 20401, a right wire collector 20402, and a front wire collector 20403.

[0029] The left variable length part 20201 and the right variable length part 20202 have similar structures and working principles. The left variable length part 20201 is a hollow structure, which includes a left guide rail 2020101, a left slide groove 2020102 and a left rotating joint 2020103. The left camera 20101 is located at the leftmost end, and the left camera 20101 is connected to the left end of the left guide rail 2020101 through the left rotating joint 2020103. The left data line 20301 connected to the left camera 20101 is arranged inside the left guide rail 2020101. The left guide rail 2020101 can slide in the left slide groove 2020102, and the left slide groove 2020102 is fixed to the box structure part of the suitcase 101. The left data line 20301 transmits the video collected by the left camera 20101 to the single-chip computer 10202 through the data input port 10203. The left data line 20301 is wound somewhere between the two ends and connected to the left wire collector 20401. The main difference between the left variable length part 20201 and the right variable length part 20202 is that the left guide rail 2020101 and the right guide rail 2020201 are parallel and staggered with each other, and the left guide rail 2020101 is located in front of the right guide rail 2020201. In order to facilitate the measurement work, the structure is set up so that the line connecting the front end points of the camera lenses of the left camera 20101 and the right camera 20102 is parallel to the guide rail in the left variable length part 20201 or the right variable length part 20202.

[0030] The front length-changing portion 20203 includes a front telescopic rod 2020301, a middle telescopic rod 2020302, a rear telescopic rod 2020303, a front rotating joint 2020304 and a middle rotating joint 2020305. The front camera 20103 is located at the front end, and the front camera 20103 is connected to the front end of the front telescopic rod 2020301 through the front rotating joint 2020304. The middle rotating joint 2020305 is arranged between the rear end of the front telescopic rod 2020301 and the front end of the middle telescopic rod 2020302. The front telescopic rod 2020301 can perform telescopic movement relative to the middle telescopic rod 2020302, and the middle telescopic rod 2020302 can perform telescopic movement relative to the rear telescopic rod 2020303. To complete the telescopic movement, the rear telescopic rod 2020303 is fixedly connected to the box structure part of the suitcase 101, and the front variable length part 20203 is also a hollow structure. The front data line 20303 connected to the front camera 20103 is arranged inside the front variable length part 20203. The front data line 20303 transmits the video collected by the front camera 20103 to the single-chip computer 10202 through the data input port 10203. The front data line 20303 is wound somewhere between the two ends and connected to the front wire collector 20403.

[0031] It should be pointed out that the camera 201 slides out or retracts from the body of the suitcase 101 through telescopic movement, which can also be replaced by a single movement or a combined movement of rotation, telescopic or folding, all of which are within the protection scope of the technical solution of the present utility model.

[0032] The left camera 20101, the right camera 20102 and the front camera 20103 have similar structures and working principles. The front camera 20103 is provided with a shielding structure 2010301 and the light-sensitive part of the slit lens 2010302 is a slit. The shielding structure 2010301 can be set as a diffusion-type slit structure to adapt to the length of the linear marker 3. Point lights can also be set around the slit lens 2010302 to enhance the light. The slit lens 2010302 has instantaneous and convenient recognition of the linear marker 3, which improves the measurement accuracy and work efficiency of the system.

[0033] The left wire take-up 20401, the right wire take-up 20402 and the front three wire take-ups 20403 have similar structures and working principles. The right wire take-up 20402 also includes a drum 2040201 and a reel 2040202. The drum 2040201 can rotate around the reel 2040202. The drum 2040201 is a hollow structure. The shaft end of the reel 2040202 is cantilevered and connected to the front side wall of the right wire take-up 20402. The reel 2040202 has a smaller diameter. The front side wall of the right wire take-up 20402 is connected to the reel 2040202. The inner end of the spiral spring 2040203 is fixed in the vicinity, the outer end of the spiral spring 2040203 is fixed on the inner wall of the reel 2040201, the outer wall of the reel 2040201 is wound around the right data line 20302, the right data line 20302 is connected to the data input port 10203 through the small hole opened on the outer wall of the reel 2040201, the small hole opened on the strip wall 2040204 and the small hole opened on the lower left corner of the right take-up device 20402 in sequence, and the right data line 20302 is fixed near the small hole opened on the strip wall 2040204. The small hole opened on the strip wall 2040204 is located on the extension line of the axis of the reel 2040202.

[0034] The working process of the right wire take-up device 20402: when the right guide rail 2020201 extends to the right, it pulls the right data line 20302, causing the reel 2040201 to rotate, and the reel 2040201 drives the spiral spring 2040203 to tighten. The friction between the right slide groove 2020202 and the right guide rail 2020201 makes the spiral spring 2040203 remain in a tightened state during the operation of the system. When the right guide rail 2020201 retracts to the left, the spiral spring 2040203 begins to loosen, driving the reel 2040201 to rotate in the opposite direction, and the right data line 20302 is wound around the reel 2040201. During the whole process that the right guide rail 2020201 extends to the right or retracts to the left, the data line on the right side of the right wire take-up device 20402 always remains straight, and the length of the data line on the left side of the right wire take-up device 20402 always remains unchanged, thereby avoiding disordered winding of the right data line 20302 and ensuring the normal realization of the telescopic function of the right variable length part 20202.

[0035] Theoretically, any linear marker can be used for the linear marker 3, but in practical use, a colored coating is more convenient: the colored coating is easy to apply on handrails and steps, and the applied colored coating will not affect the operation of the elevator. In order to facilitate subsequent processing, the colored coating can be designed as an easy-to-remove coating, such as a common easy-to-remove colored ink.

[0036] The specific test process of the system is as follows: (1) Turn off the escalator and start the pre-measurement preparation work. Figure 1 The system is placed, and the left camera 20101 is brought close to the handrail 4 by the forward and backward movement of the suitcase 101 and the left and right telescopic movement of the left variable length part 20201, and the line-shaped marker 3 is painted on the handrail. The light-sensitive part of the slit lens of the left camera 20101 is made to face the line-shaped marker 3 by the rotation of the left rotating joint 2020103. The adjustment method of the left camera 20101 is the same as that of the right camera 20102. The front camera 20103 is brought close to the nearest step 5 by the telescopic movement of the front variable length part 20203 and the rotation movement of the middle rotating joint 2020305, and the line-shaped marker 3 is painted on the step 5. The light-sensitive part of the slit lens of the front camera 20103 is made to face the line-shaped marker 3 by the rotation movement of the front rotating joint 2020304. (2) The escalator is turned on. During the operation of the escalator, the linear marker 3 on the handrail 4 or the step 5 will repeatedly appear in the camera 201. (3) The percentage difference in the running speed between the left (right) handrail and the step is calculated based on the time interval at which the linear marker 3 appears in the same camera 201.

[0037] By setting more linear markers, the technical solution proposed by the utility model can be expanded to the measurement contents such as braking distance detection. It should be pointed out that the present invention points out that the linear marker can also be other forms of markers, all of which are within the protection scope of the technical solution of the utility model.

[0038] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An escalator speed detection system, characterized in that: It includes a connecting part and a variable length component, the variable length component includes a left variable length component, a right variable length component and a front variable length component, and the variable length components are all connected to the connecting part, any variable length component includes a variable length part and a camera, one end of the variable length part is connected to the camera, and the other end is connected to the connecting part; a shielding structure is provided on the camera and the photosensitive part of the camera is a slit lens; the system also includes a linear marker, and the handrails and steps of the escalator are provided with linear markers; when in use, any camera is facing and close to a linear marker at a certain moment.

2. The system according to claim 1, characterized in that The connecting part is provided with a control component, which includes a single-chip microcomputer, a human-computer interaction interface and a data input port. The single-chip microcomputer is connected to the camera via a data line.

3. The system according to claim 2, characterized in that The variable length component is provided with a wire receiver, the wire receiver is provided with the data wire, and the data wire connects the camera and the data input port.

4. The system according to claim 3, characterized in that The cable take-up device comprises a reel and a drum, the drum can rotate around the reel, a spiral spring is arranged between the reel and the drum, and the data cable is connected through the reel and wound around the outer wall of the drum.

5. The system according to claim 1, characterized in that The length-changing portion is a telescopic rod, a folding rod or a rotating rod.

6. The system according to claim 1, characterized in that The variable length portion comprises a left variable length portion, a right variable length portion and a front variable length portion, and a rotating joint is provided at one end of the left variable length portion, the right variable length portion and the front variable length portion away from the connecting portion.

7. The system according to claim 6, characterized in that The camera can be rotated via the swivel joint.

8. The system according to claim 1, characterized in that The linear marker is a colored coating, and the color of the colored coating is different from the color of the handrail and the step ladder.

9. The system according to claim 1, characterized in that The connecting part is a box body, a handle is provided on the box body, and one end of the variable length part is arranged inside the box body.

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