Door lock meshing amount measuring device based on machine vision

Abstract

The utility model discloses a door lock meshing amount measuring device based on machine vision, which belongs to the technical field of elevator detection and comprises a locking component, an adjusting component, a CCD (charge coupled device) camera and terminal equipment, a back plate is fixed on an elevator shaft, an L-shaped connecting plate is arranged at the top of the back plate, the locking component comprises a fixed rod and a movable block, and the movable block is fixed on the back plate. A fixed block is arranged in the middle of the fixed rod, a screw rod is arranged at one end of the movable block, a nut capable of freely rotating is arranged in the fixed block, the screw rod penetrates through the fixed block and is in threaded fit with the nut, and the measuring device is clamped on the connecting plate through the locking assembly; the adjusting assembly is movably connected with the fixing rod, the CCD camera is fixed to the adjusting assembly, the CCD camera is aligned to the lock hook assembly through the adjusting assembly, and the CCD camera is in wireless connection or Bluetooth connection with the terminal device. According to the utility model, rapid measurement and distance measurement data can be realized; meanwhile, the structure is simple, and maintenance personnel can conveniently carry and install.

Description

Technical Field

[0001] This utility model belongs to the field of elevator inspection technology, and in particular relates to a door lock engagement measurement device based on machine vision. Background Technology

[0002] like Figure 1 The diagram shows a schematic of an elevator door lock, including a wire rope drive assembly, a landing door, a back panel, a mounting plate, a locking hook assembly, and a locking tongue assembly. The back panel is fixed to the elevator shaft, and the wire rope drive assembly is connected to the back panel. Two mounting plates are each connected to the wire rope drive assembly. Each landing door is located below one of the mounting plates. The wire rope drive assembly drives the mounting plates and landing doors to move in opposite directions, thereby controlling the opening and closing of the elevator doors. The locking hook assembly is fixed to the back panel and located between the two mounting plates, and this assembly is located on one of the mounting plates and moves with the mounting plate.

[0003] like Figure 2 The image shows a locking hook assembly and a locking tongue assembly. The locking hook assembly includes a first contact point and a locking hook body, while the locking tongue assembly includes a second contact point and a locking tongue body. Locking is completed when the locking hook body and the locking tongue body engage.

[0004] Because the elevator car can only start when the engagement length of the locking element is not less than 7mm, the engagement of the locking hook body and the locking tongue body (such as...) Figure 3 The first and second contact points are only allowed to engage when the perpendicular distance between points A and B reaches 7mm. This demonstrates that the engagement depth of the elevator door lock is a crucial indicator of elevator safety.

[0005] In the existing technology, the common measurement method is that the inspector usually judges whether the door lock is connected by the sound of the contactor or by the spark generated when the circuit is connected. After the door lock is connected, the engagement dimension is measured with a tool. When measuring, the inspector holds the measuring tool with one hand and needs to continuously operate the door lock with the other hand. This will cause large measurement errors and cannot guarantee accuracy. At the same time, multiple measurements will cause inspector fatigue and low work efficiency.

[0006] Chinese patent CN112125080B, published under authorization announcement number extra, discloses a method and system for detecting the engagement depth of an elevator door lock. The solution utilizes a machine to replace manual labor, automatically replacing the door lock trigger component using a quick-change disc connection structure. The controller controls the door lock trigger component to trigger and open the door lock, obtains feedback signals from the door lock trigger component, and uses a vision module to capture the entire unlocking process. The controller controls the execution device and vision device to detect the engagement depth of the elevator door lock.

[0007] However, the above-mentioned solution has a complex structure, which is not conducive to the daily carrying and rapid testing by inspection personnel, and it cannot be quickly disassembled and assembled. Utility Model Content

[0008] The purpose of this invention is to provide a door lock engagement measurement device based on machine vision to solve the problems existing in the background art.

[0009] The objective of this utility model is achieved through the following technical solution:

[0010] A machine vision-based door lock engagement measurement device is used to measure the engagement depth of an elevator door lock. The elevator door lock includes a back plate, a mounting plate, a lock hook assembly, and a lock tongue assembly. The lock hook assembly includes a first contact point and a lock hook body, and the lock tongue assembly includes a second contact point and a lock tongue body. The measuring device includes a locking assembly, an adjusting assembly, a CCD camera, and a terminal device. The back plate is fixed to the elevator shaft, and an L-shaped connecting plate is provided on the top of the back plate.

[0011] The locking assembly includes a fixed rod and a movable block. The fixed rod has a fixed block in the middle, and a screw is provided at one end of the movable block. The fixed block has a freely rotatable nut inside. The screw passes through the fixed block and is threadedly engaged with the nut. The measuring device is clamped on the connecting plate by the locking assembly.

[0012] The adjustment component is movably connected to the fixed rod, the CCD camera is fixed on the adjustment component, the CCD camera is aligned with the locking hook component through the adjustment component, and the CCD camera is wirelessly or Bluetooth connected to the terminal device.

[0013] Furthermore, the movable block has a T-shaped structure, and one side of the lower end of the T-shape of the movable block abuts against the connecting plate.

[0014] Furthermore, the fixed rod is provided with an abutment block at one end near the movable block, and both the abutment block and the movable block are provided with rubber pads on the side near the connecting plate.

[0015] Furthermore, the adjustment assembly includes a first fastener, a connecting rod, and a second fastener. The fixing rod is connected to the connecting rod via the first fastener, and the CCD camera is connected to the connecting rod via the second fastener.

[0016] Furthermore, the CCD camera is equipped with a power supply and processing module, which is located on the side of the movable block away from the fixed rod, and is electrically connected to the CCD camera.

[0017] The beneficial effects of this utility model are:

[0018] 1) It can achieve rapid measurement, reduce the intensity of manual measurement, and the measurement results can be easily stored.

[0019] 2) The structure is simple and easy for maintenance personnel to carry and install. Attached Figure Description

[0020] Figure 1 This is a diagram of an elevator door lock.

[0021] Figure 2 A schematic diagram showing the disengagement of the locking hook assembly and the locking tongue assembly;

[0022] Figure 3 This is a schematic diagram showing the engagement of the locking hook assembly and the locking tongue assembly.

[0023] Figure 4 This is a side view of a door lock engagement measurement device based on machine vision according to this utility model;

[0024] In the diagram, 1-wire rope drive assembly, 2-layer door, 3-hanging plate, 4-back plate, 41-connecting plate, 5-lock hook assembly, 51-lock hook body, 52-first contact point, 6-lock tongue assembly, 61-lock tongue body, 62-second contact point, 7-locking assembly, 71-fixed rod, 72-moving block, 73-fixed block, 74-screw, 75-nut, 76-abutment block, 8-adjustment assembly, 81-first fastener, 82-second fastener, 83-connecting rod, 9-CCD camera, 91-power supply and processing module. Detailed Implementation

[0025] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] See Figures 1-4 This utility model provides a technical solution:

[0027] like Figures 1-4 As shown, a machine vision-based door lock engagement measurement device is used to measure the engagement depth of an elevator door lock. The elevator door lock includes a back plate 4, a hanging plate 3, a lock hook assembly 5, and a lock tongue assembly 6. The lock hook assembly 5 includes a first contact point 52 and a lock hook body 51. The lock tongue assembly 6 includes a second contact point 62 and a lock tongue body 61. The measuring device includes a locking assembly 7, an adjusting assembly 8, a CCD camera 9, and a terminal device. The back plate 4 is fixed to the elevator shaft, and an L-shaped connecting plate 41 is provided on the top of the back plate 4. The CCD camera 9 is wirelessly connected to the terminal device or connected via Bluetooth.

[0028] Using the above technical solution, when inspecting elevator door locks, maintenance personnel fix the measuring device to the connecting plate 41 above the back plate 4 using the locking assembly 7 inside the elevator shaft. Then, by adjusting the assembly 8, they align the CCD camera 9 with the lock hook assembly 5, open and close the landing door 2, and record the state of the lock hook body 51 and the lock tongue body 61 when locked using the CCD camera 9. This data is then transmitted back to the terminal device for image analysis, thereby quickly determining the engagement depth. The terminal device can be a mobile phone, tablet, laptop, etc., which is convenient for maintenance personnel to use, enables rapid measurement, reduces the intensity of manual measurement, and allows for easy storage of measurement results for subsequent maintenance. Furthermore, the simple structure makes it easy for maintenance personnel to carry and install.

[0029] Furthermore, the locking assembly 7 includes a fixed rod 71 and a movable block 72. The fixed rod 71 has a fixed block 73 in its middle, and one end of the movable block 72 has a screw 74. The fixed block 73 has a freely rotatable nut 75 inside, and the screw 74 passes through the fixed block 73 and is threadedly engaged with the nut 75. The measuring device is clamped onto the connecting plate 41 by the locking assembly 7. The movable block 72 has a T-shaped structure, and one side of the lower T-shaped end of the movable block 72 abuts against the connecting plate 41. The fixed rod 71 has an abutment block 76 near the movable block 72, and both the abutment block 76 and the movable block 72 have rubber pads on the side near the connecting plate 41.

[0030] Through the above technical solution, moving the nut 75 drives the cooperating screw 74 to move, which in turn drives the movable block 72 to move back and forth. The distance between the movable block 72 and the abutment block 76 is adjusted by the nut 75 and the screw 74, thereby clamping or loosening the abutment plate. The threaded engagement has a locking effect, preventing the clamping device from falling off after being clamped on the abutment plate. At the same time, the rubber pad can increase friction for easy clamping and also protect the locking assembly 7 and the connecting plate 41.

[0031] Furthermore, the adjustment component 8 is movably connected to the fixing rod 71, and the CCD camera 9 is fixed on the adjustment component 8. The adjustment component 8 includes a first fastener 81, a connecting rod 83, and a second fastener 82. The fixing rod 71 is connected to the connecting rod 83 through the first fastener 81, and the CCD camera 9 is connected to the connecting rod 83 through the second fastener 82.

[0032] Through the above technical solution, the first fastener 81 can drive the connecting rod 83 and the CCD camera 9 on the connecting rod 83 to adjust their position on the fixed rod 71, thereby adjusting the shooting distance between the CCD camera 9 and the locking hook assembly 5. The second fastener 82 can adjust the height of the CCD camera 9, thus facilitating alignment with the locking hook assembly 5. At the same time, the first fastener 81 and the second fastener 82 are locked together by screws to complete the locking process.

[0033] Furthermore, the CCD camera 9 is provided with a power supply and processing module 91, which is located on the side of the movable block 72 away from the fixed rod 71, and is electrically connected to the CCD camera 9.

[0034] Through the above technical solution, the power supply and processing module 91 can supply power to the CCD camera. The power supply and processing module 91 is equipped with a Bluetooth module or a wireless module. The photos taken by the CCD camera 9 can be transmitted back to the terminal device through the power supply and processing module 91, and the CCD camera 9 can also be controlled to take pictures through the terminal device.

[0035] The specific working principle is as follows: The CCD camera 9 pre-records a standard image of a similar elevator door lock engaging, recording the engagement state of the lock hook body 51 and the lock tongue body 61 when the first contact point 52 and the second contact point 62 are in contact. During the actual measurement process, the maintenance personnel install the measuring device and adjust the distance of the CCD camera 9 to be as consistent as possible with the distance when the standard image was taken.

[0036] CCD camera 9 uses image processing algorithms (such as OpenCV or Halcon) to analyze the video stream in real time. When it detects that the first contact point 52 and the second contact point 62 are just in contact, it sends a software command through the API interface to trigger CCD camera 9 to take a picture. At this time, CCD camera 9 captures the engagement depth of the locking hook body 51 and the locking tongue body 61 when the first contact point 52 and the second contact point 62 just make contact. Then, it sends the picture back to the terminal device through the power supply and processing module 91. After analyzing the picture, the terminal device finds the locking hook body 51 and the locking tongue body 61, and calculates the engagement distance between the locking hook body 51 and the locking tongue body 61. Figure 3 (The perpendicular distance from point A to point B).

[0037] Multiple measurements were taken by repeatedly opening and closing the landing door 2, and the average value was calculated. If the final result shows an engagement depth greater than or equal to 7mm, it indicates that the locking hook assembly 5 and the locking tongue assembly 6 are functioning normally; if the final result shows an engagement depth less than 7mm, it indicates that the locking hook assembly 5 and the locking tongue assembly 6 are malfunctioning and require inspection and adjustment. The measuring device in this solution enables rapid measurement, reducing the intensity of manual measurement. The measurement results can be easily stored for reference in subsequent maintenance. Furthermore, its simple structure makes it easy for maintenance personnel to carry and install.

[0038] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A machine vision based door lock engagement measurement device for measuring the depth of engagement of an elevator door lock, the elevator door lock comprising a back plate (4), a hanger plate (3), a hook assembly (5) and a bolt assembly (6), the hook assembly (5) comprising a first contact point (52), a hook body (51), the bolt assembly (6) comprising a second contact point (62) and a bolt body (61), characterised in that: The measuring device comprises a locking assembly (7), an adjusting assembly (8), a CCD camera (9) and a terminal device, the back plate (4) is fixed on the elevator shaft, the top of the back plate (4) is provided with an L-shaped connecting plate (41), The locking assembly (7) comprises a fixed rod (71) and a movable block (72), the middle part of the fixed rod (71) is provided with a fixed block (73), one end of the movable block (72) is provided with a screw rod (74), the inside of the fixed block (73) is provided with a nut (75) which can rotate freely, the screw rod (74) passes through the fixed block (73) and is screwed with the nut (75), the measuring device is clamped on the connecting plate (41) through the locking assembly (7); The adjusting assembly (8) is movably connected with the fixed rod (71), the CCD camera (9) is fixed on the adjusting assembly (8), the CCD camera (9) is aligned with the locking hook assembly (5) through the adjusting assembly (8), and the CCD camera (9) is wirelessly connected or Bluetooth-connected with the terminal device.

2. The machine vision-based door lock engagement measurement device of claim 1, wherein: The movable block (72) is T-shaped, and the T-shaped lower end of the movable block (72) is abutted with one side of the connecting plate (41).

3. The machine vision-based door lock engagement measurement device of claim 1, wherein: The fixed rod (71) is provided with an abutting block (76) at one end close to the movable block (72), and the abutting block (76) and the movable block (72) are provided with rubber pads on the sides close to the connecting plate (41).

4. The machine vision-based door lock engagement measurement device of claim 1, wherein: The adjusting assembly (8) comprises a first fastener (81), a connecting rod (83) and a second fastener (82), the fixed rod (71) is connected with the connecting rod (83) through the first fastener (81), and the CCD camera (9) is connected with the connecting rod (83) through the second fastener (82).

5. The machine vision-based door lock engagement measurement device of claim 1, wherein: The CCD camera (9) is provided with a power supply and processing module (91), the power supply and processing module (91) is located on the side of the movable block (72) away from the fixed rod (71), and the power supply and processing module (91) is electrically connected with the CCD camera (9).

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