A distance detection device

Abstract

The application discloses a distance detection device, belonging to the elevator detection field. Including the support assembly for adsorbing and fixing on the top of the elevator car, and the displacement assembly arranged thereon; the displacement assembly is connected with the reference positioning assembly and the visual distance measuring assembly, the reference positioning assembly is used for abutting against the door blade side wall of the elevator car, and the horizontal reference distance of the device body relative to the door blade is determined in a physical locking mode; the visual distance measuring assembly is configured to be able to extend into the gap between the sill of the elevator car and the sill of the landing door without interference, and the image of the landing door ball is collected in real time by the visual sensor during the operation of the elevator. The distance detection device of the application automatically solves the gap between the door blade and the door ball by combining the horizontal reference distance and the visual image data through the processing unit, successfully converts the traditional manual static measurement into continuous dynamic detection, effectively solves the problem of low efficiency and the need for two people to cooperate in the prior art, and improves the convenience of elevator detection.

Description

Technical Field

[0001] This invention relates to the field of elevator inspection technology, and more particularly to a distance detection device. Background Technology

[0002] During elevator installation, commissioning, and routine maintenance and testing, the gap detection between the elevator landing door ball and the car door knife is a key item to ensure the safety and stability of elevator operation. This gap must be strictly controlled within a range greater than 5mm to ensure that the ball and knife can cooperate smoothly during the elevator door opening and closing process. This avoids collisions caused by too small a gap, which could lead to elevator shaking, door system jamming, and other malfunctions, thus ensuring passenger safety and the normal service life of the elevator equipment.

[0003] Currently, the industry generally uses manual measurement to detect this gap. The specific operation process requires two staff members. One staff member climbs onto the top of the elevator car and operates the elevator to stop at each floor one by one, ensuring that the elevator car and the landing door are in a relatively stationary testing state. The other staff member stays in the car and uses measuring tools to directly measure the gap between the landing door ball and the car door knife. During the testing process, after the measurement of each floor is completed, the elevator needs to be restarted to go to the next floor, and the above measurement steps are repeated until the testing of all floors is completed. This testing method has the inefficiency of manual coordination and stopping at each floor one by one, which makes it difficult to meet the needs of convenient elevator testing.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0005] This invention provides a distance detection device to solve the problem that the detection of the gap between the elevator door knife and the door ball relies on two people working together and requires static measurement at each floor, resulting in a cumbersome and inefficient detection process.

[0006] This invention adopts the following technical solution: a distance detection device. It includes a support assembly configured to be magnetically fixed to the top of an elevator car; a displacement assembly disposed on the support assembly for providing vertical position and angle adjustment functions; a reference positioning assembly connected to the support assembly or the displacement assembly for abutting against the side wall of the elevator car door knife or sill to determine the horizontal reference distance of the device body relative to the elevator car door knife; a visual ranging assembly connected to the displacement assembly, configured to extend into the gap between the elevator car sill and the landing door sill, the visual ranging assembly being equipped with a visual sensor configured to capture images of the landing door ball during elevator operation; and a processing unit connected to the visual sensor, configured to receive image data and calculate the gap between the elevator car door knife and the landing door ball in conjunction with the horizontal reference distance.

[0007] Furthermore, the processing unit includes a data processing terminal, which is configured to be fixed on the top of the elevator car. The data processing terminal is used to receive video streams or image data captured by the vision sensor, calculate the distance from the vision sensor to the landing door ball in real time according to a preset algorithm, and calculate the gap value between the door knife and the door ball in combination with the horizontal reference distance. The calculation results are then sent to the display device via wireless transmission.

[0008] Furthermore, the visual ranging component includes a multi-stage arm structure, which is configured to bypass obstacles on the top of the elevator car and deliver the visual sensor to the vertical plane where the door knife and door ball are located. The multi-stage arm structure includes: a horizontal arm and a movable arm, the horizontal arm being connected to the displacement component, and the movable arm being sleeved on the horizontal arm to form a first-stage horizontal telescopic structure; a vertical arm, which is vertically inserted through the end of the movable arm via a corner piece for vertical displacement adjustment; a corner arm and an adjusting arm, the corner arm being connected to the bottom end of the vertical arm, and the adjusting arm being sleeved on the corner arm in a straight line; and an extension arm, connected to the end of the adjusting arm, the extension arm being constructed as a slender rod to extend into the detection gap, and the visual sensor being installed at the end of the extension arm with its lens facing the landing door direction.

[0009] Furthermore, the visual ranging component is mounted on the displacement component via a folding unit, the folding unit being configured to rotate relative to the displacement component to switch between a stowed state and a working state; the lateral arm is fixedly connected to the folding unit.

[0010] Furthermore, the reference positioning component includes a fixed rod and a telescopic rod movably disposed within the fixed rod. The end of the telescopic rod is connected to a measuring unit via a universal joint assembly. The measuring unit includes a measuring tape. The reference positioning component is configured to: adjust the extension length of the telescopic rod and adjust the universal joint assembly so that the front end of the measuring tape housing or the end face of the measuring hook is in a horizontal position and abuts against the side wall of the elevator car door knife or sill. At this time, the locked extension length of the telescopic rod determines the horizontal reference distance.

[0011] Furthermore, the fixed rod is integrally provided with a hollow protrusion strip made of transparent material, and the telescopic rod is provided with a second protrusion strip adapted to slide within the first protrusion strip; the reference positioning component also includes a fixing unit, which includes a mounting sleeve and a fixing post fixed to one end of the protrusion strip, and an insertion rod that vertically penetrates the fixing post. The second protrusion strip is provided with multiple fixing holes adapted to the bottom end of the insertion rod, and the insertion rod is kept under downward locking force by a tension spring.

[0012] Furthermore, the displacement component includes a rotating ring and a vertically extending movable rod; the rotating ring is rotatably mounted within the support component via a bearing, used to drive the movable rod to perform angle fine adjustments; a return spring is sleeved on the movable rod and a pressing end is provided; a locking plate is provided on the side of the support component or the rotating ring; a locking unit is provided on the pressing end; the locking unit is configured to cooperate with the locking plate to fix the vertical position of the movable rod; the reference positioning component and the visual ranging component are both connected to the movable rod.

[0013] Furthermore, the reference positioning component is connected to the movable rod via a folding component. The folding component includes a fixed base, a spring, and a rotating sleeve. The rotating sleeve can reciprocate relative to the fixed base to achieve storage or unfolding. The reference positioning component is connected to the waist-shaped plate on the rotating sleeve via a fixing ring.

[0014] Furthermore, the support assembly includes a T-shaped fixing base, on which a suction cup unit is fixed by a folding unit; the folding unit includes at least three sets of hinge rods hinged along the circumference of the T-shaped fixing base, one end of each hinge rod is hinged to a support rod, and one end of each of the three sets of support rods is hinged to a hinge seat, which is fixedly sleeved on the T-shaped fixing base; the suction cup unit is configured to adhere to the top surface of the elevator car and forms a triangular support structure by unfolding the folding unit.

[0015] Furthermore, the suction cup unit includes a suction cup body, on which two sets of symmetrically arranged connecting frames are fixed, and a mounting base is connected between the two sets of connecting frames. The mounting base is fixed to one end of the hinge seat. A manual operating lever is mounted on the suction cup body to expel air from the suction cup and create negative pressure. A sealing ring is mounted on the bottom of the suction cup body.

[0016] The above-mentioned at least one technical solution adopted in this invention can achieve the following beneficial effects: A distance detection device, through the cooperation of a support component and a displacement component, achieves stable installation and flexible posture adjustment on the top of the elevator car, forming a stable detection platform. It employs a detection architecture combining a reference positioning component and a visual ranging component. The reference positioning component establishes a horizontal reference distance by physically locking against the car door blade or sill sidewall. The visual ranging component extends into the narrow gap between the car sill and the landing door sill without interference. A visual sensor captures real-time images of the landing door's ball bearing during elevator operation. Finally, a processing unit automatically calculates the actual gap by combining the known horizontal reference distance and the visual image data. While ensuring detection accuracy, it can automatically collect data from all floors without frequent elevator starts and stops, reducing the labor and time costs of detection operations and effectively solving the shortcomings of cumbersome processes and low efficiency in existing elevator detection technologies. Attached Figure Description

[0017] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0018] In the attached diagram: Figure 1 This is an overall schematic diagram of a distance detection device according to this application; Figure 2 for Figure 1 A schematic diagram of the working status; Figure 3 for Figure 2 Enlarged view of point A; Figure 4 for Figure 2 A schematic diagram of a partial structure; Figure 5 for Figure 4 Enlarged view of point B; Figure 6 for Figure 2 Enlarged view of point C; Figure 7 for Figure 6 Enlarged view of point D; Figure 8 for Figure 5A schematic diagram showing the usage status of the distance detection device; Figure 9 for Figure 1 A partial structural diagram; Figure label: 1. Support assembly; 11. T-shaped fixing seat; 12. Hinge rod; 13. Support rod; 14. Hinge seat; 15. Mounting base; 16. Suction cup body; 17. Connecting frame; 18. Manual operating lever; 19. Sealing ring; 110. Hanging rod; 111. Holding rod; 2. Displacement assembly; 21. Rotating ring; 22. Movable rod; 23. Pressing end; 24. Return spring; 25. Locking plate; 26. Mounting block; 27. Knob rod; 28. Rotating shaft; 29. ​​Locking tongue; 3. Folding assembly; 31. Fixing base; 32. Spring clip; 33. Rotating sleeve; 34. Waist-shaped plate; 35. Fixing ring; 351. Buckle block; 4. Reference positioning assembly; 41. Fixing rod; 42. Telescopic rod; 43. Mounting plate; 44. T-type spirit level; 46. Universal joint one; 47. Universal joint two; 48. Measuring tape; 49. Spirit level; 410. Raised strip one; 411. Raised strip two; 412. Fixing hole; 413. Mounting sleeve; 414. Fixing post; 415. Insert rod; 416. Extension end; 417. Tension spring.

[0019] 5. Distance measuring component; 51. Folding unit; 52. Lateral arm; 53. Movable arm; 54. Corner component; 55. Vertical arm; 56. Corner arm; 57. Adjustable arm; 58. Extension arm; 59. Vision sensor. Detailed Implementation

[0020] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0021] The technical solutions provided by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0022] Reference Figures 1-3 As shown, the present invention provides a distance detection device, including a support assembly 1, a displacement assembly 2, a folding assembly 3, a reference positioning assembly 4, and a visual ranging assembly 5. The folding assembly 3 is vertically movably mounted on the support assembly 1 via the displacement assembly 2, the reference positioning assembly 4 is rotatably mounted on the folding assembly 3, and the visual ranging assembly 5 is fixedly mounted on the movable rod 22 of the displacement assembly 2.

[0023] The support component 1 in this invention is mainly used as the basic support for the distance detection device. As a preferred support component 1, it includes a T-shaped fixing seat 11. A suction cup unit is fixed on the T-shaped fixing seat 11 by a folding unit. The suction cup unit is attached to the elevator car floor. During assembly, the suction cup unit can quickly adhere to the elevator car floor to form a preliminary fixation. The support height of the T-shaped fixing seat 11 can be flexibly adjusted with the help of the folding unit. At the same time, the suction cup unit's adsorption and fixing method does not require drilling holes on the car surface, which not only ensures the stability of the support component 1 after installation, but also avoids damage to the elevator car. It is fully compatible with the distance detection device's requirements for stable basic support and convenient installation.

[0024] To achieve the folding and unfolding support functions of the device, ensuring that it is compact and portable when folded and stable when unfolded, the folding unit includes at least three sets of hinge rods 12 that are hinged around the T-shaped fixed base 11. One end of the hinge rod 12 is hinged to a support rod 13, and one end of the three sets of support rods 13 is hinged to a hinge seat 14. The hinge seat 14 is fixedly sleeved on the T-shaped fixed base 11. In use, the hinge rod 12 and the support rod 13 can be hinged together to quickly unfold and form a symmetrical triangular support structure. The synergistic force of the three sets of rods enhances the support stability. When stored, it can be folded up along the hinge point to reduce the space occupied by the device. At the same time, the fixed sleeve design of the hinge seat 14 and the T-shaped fixing seat 11 ensures the overall assembly of the folding unit is firm, which not only avoids loosening and displacement during use, but also allows for unfolding and storage without complicated operations.

[0025] To ensure the distance detection device is firmly attached to the elevator car and is easy to install and remove, and to ensure that it is not easy to fall off after installation and that the installation and removal process is efficient and labor-saving, the suction cup unit includes a suction cup body 16. Two sets of symmetrically arranged connecting frames 17 are fixed on the suction cup body 16. A mounting base 15 is connected between the two sets of connecting frames 17. The mounting base 15 is fixed to one end of the hinge seat 14. A manual operating lever 18 is installed on the suction cup body 16. A sealing ring 19 is installed at the bottom of the suction cup body 16. During installation, the suction cup body 16 is placed against the elevator car floor. By pressing the manual operating lever 18, air inside the suction cup is expelled to create negative pressure. The sealing ring 19 enhances airtightness and ensures stable adsorption. The cooperation between the two sets of symmetrical connecting brackets 17 and the mounting base 15 improves the firmness of the connection between the suction cup unit and the hinge seat 14. During disassembly, the negative pressure can be quickly released by turning the manual operating lever 18 in the opposite direction. This avoids damage to the elevator car floor and allows for disassembly and assembly without additional tools, perfectly meeting the requirements of distance detection devices for stable adsorption and convenient disassembly and assembly.

[0026] Reference Figures 4-5As shown, in order to ensure measurement accuracy and achieve horizontal and vertical alignment of the measuring component with the car sill and the landing door sill, the displacement component 2 includes a rotating ring 21. The rotating ring 21 is installed in the T-shaped fixed seat 11 through the bearing. A movable rod 22 is vertically installed on the rotating ring 21. One end of the movable rod 22 is fixedly connected to the folding component 3. During adjustment, the rotating ring 21 can rotate smoothly along the bearing, driving the movable rod 22 and the folding assembly 3 to make synchronous angle fine adjustments. The low friction characteristics of the bearing ensure the accuracy of angle adjustment, and the fixed sleeve design of the movable rod 22 and the folding assembly 3 avoids relative loosening during use. Vertical alignment can be completed quickly without complicated tools, and the structure can be kept stable and non-shifted after positioning, effectively improving measurement accuracy.

[0027] To ensure reliable contact between the measuring unit and the elevator car floor and to prevent detachment or deviation during the measurement process, a pressing end 23 is fixed to the top of the movable rod 22. A return spring 24 is sleeved on the movable rod 22. One end of the return spring 24 is connected to the bottom of the pressing end 23, and the other end is connected to the upper end face of the rotating ring 21 to provide initial support force for the movable rod 22. A locking plate 25 is provided on the side of the rotating ring 21, and the pressing end 23 is locked to the locking plate 25 through a locking unit. In use, pressing the pressing end 23 can move the movable rod 22 downward, bringing the measuring unit closer to the elevator car floor. The supporting force of the return spring 24 can buffer the contact pressure and avoid damage caused by hard contact. The cooperation between the locking unit and the locking plate 25 can fix the position of the movable rod 22. This not only ensures the stability of the contact between the measuring unit and the ground, but also completes the positioning through the simple operation of pressing and locking, which is fully adapted to the device's requirements for reliable contact and convenient operation.

[0028] To reliably lock the movable rod 22, ensure the stability of the contact between the measuring unit and the elevator car floor, and prevent displacement or loosening during the measurement process, the locking unit includes a mounting block 26 fixed to the side of the pressing end 23. A knob rod 27 is provided on the mounting block 26 through a bearing via a rotating shaft 28. One end of the knob rod 27 is fixed with a locking tongue 29 suitable for contacting the bottom surface of the locking plate 25. A silicone anti-slip pad (not shown in the figure) is provided at the contact position between the locking tongue 29 and the bottom surface of the locking plate 25. When locked, rotating the knob lever 27 can rotate the locking tongue 29 to the bottom surface of the locking plate 25. The smooth operation of the knob is ensured by the cooperation of the rotating shaft 28 and the bearing. The silicone anti-slip pad can increase the friction between the locking tongue 29 and the locking plate 25 to prevent slippage after locking. It can quickly complete locking and unlocking without complicated tools, and the anti-slip design can improve the reliability of locking. It is fully adapted to the device's use requirements for a stable locking of the movable lever 22 and convenient operation.

[0029] Reference Figure 6As shown, in order to achieve convenient folding and portability of the measuring unit, and to ensure stable connection after unfolding, the folding component 3 includes a fixed base 31, which is fixedly sleeved on the movable rod 22. The fixed base 31 has a vertically arranged spring piece 32. A rotating sleeve 33 is rotatably provided on one of the extended ends of the fixed base 31. The rotating sleeve 33 is only suitable for 90-degree reciprocating rotation and is suitable for fitting the bottom surface of the extended end. The rotating sleeve 33 and the spring piece 32 generate elastic contact force. A waist-shaped plate 34 is provided on the rotating sleeve 33. The waist-shaped plate 34 is fixedly sleeved on the reference positioning component 4 through a fixing ring 35. The fixing ring 35 is fastened to the waist-shaped plate 34 through a fastener 351. Combination Figure 6 As can be seen: When unfolded, the rotating sleeve 33 is rotated in the opposite direction to 90 degrees and perpendicular to the movable rod 22. The elastic pressure of the spring piece 32 presses against the rotating sleeve 33 to form a rigid limit, preventing angular deviation during use. At the same time, the rotating sleeve 33 fits against the bottom surface of the protruding end of the fixed base 31, and the overall stability is enhanced by the support force of the contact surface. The fixing ring 35, through the fastening structure of the buckle 351 and the waist plate 34, tightly locks the reference positioning component 4 onto the folding component 3, avoiding relative loosening during use.

[0030] When folding, rotate the rotating sleeve 33 in the direction of the movable rod 22. After rotating 90 degrees, it completely fits the protruding end of the fixed base 31, causing the reference positioning component 4 to retract parallel to the movable rod 22. The elastic contact force of the spring piece 32 tightly fits the surface of the rotating sleeve 33, forming an elastic lock in the folded state, preventing the component from shaking randomly.

[0031] Reference Figures 6-8 As shown, in order to determine the horizontal reference distance of the main body of the device relative to the elevator car door knife, the reference positioning component 4 includes a fixed rod 41, which is fixed in the fixed ring 35. A telescopic rod 42 is movably provided at one end of the fixed rod 41. The telescopic rod 42 is fixed in the fixed rod 41 by a fixing unit. A mounting plate 43 is fixedly sleeved at one end of the telescopic rod 42. A horizontally arranged T-shaped level bubble 44 is fixed on the mounting plate 43. The T-shaped level bubble 44 is suitable for contacting the elevator car floor. One end of the telescopic rod 42 is connected to the measuring unit through a rotating unit. The rotating unit includes a universal joint 46 fixed to one end of the telescopic rod 42, and a universal joint 47 fixed to the rotating end of the universal joint 46. During adjustment, the extension length of the telescopic rod 42 can be flexibly adjusted through the fixed unit to adapt to the measurement spacing requirements of different elevators; the contact between the T-shaped level bubble 44 and the car floor can intuitively display the horizontal status, ensuring that the measurement benchmark is without deviation; the coordinated rotation of universal joint one 46 and universal joint two 47 can drive the measuring unit to be flexibly adjusted at multiple angles, so that it fits against the elevator car floor; it can complete the extension and angle adjustment without complicated tools, and can ensure the accuracy of the measurement benchmark in real time through the level bubble, adapting the device to the usage requirements of convenient extension, accurate horizontality, and angle adaptation.

[0032] Reference Figures 6-8 As shown, the reference positioning component 4 is used to determine the horizontal reference position of the main body of the device relative to the elevator car door knife. The reference positioning component 4 includes a fixed rod 41, which is fixed in the fixed ring 35. A telescopic rod 42 is movably provided at one end of the fixed rod 41. The telescopic rod 42 is fixed in the fixed rod 41 by a fixing unit. A hollow protrusion strip 410 made of transparent plastic is integrally provided on the fixed rod 41. A second protrusion strip 411 adapted to slide in the protrusion strip 410 is provided on the telescopic rod 42.

[0033] The fixing unit includes a mounting sleeve 413 fixed to one end of the first protrusion 410. A vertically upward fixing post 414 is fixed to the mounting sleeve 413. A rod 415 is vertically inserted through the center of the fixing post 414. The bottom end of the rod 415 movably penetrates the wall of the first protrusion 410 and extends into it. Multiple sets of fixing holes 412, which are adapted to the bottom end of the rod 415, are equally spaced along a straight line on the second protrusion 411. A tension end 416 is fixed to the top of the rod 415. A tension spring 417 is sleeved on the outside of the rod 415 between the tension end 416 and the fixing post 414. One end of the tension spring 417 abuts against or is fixed to the bottom surface of the tension end 416, and the other end abuts against or is fixed to the upper end surface of the fixing post 414, thereby initially applying a downward elastic force to the rod 415, keeping its bottom end inserted into a fixing hole 412.

[0034] One end of the telescopic rod 42 is fixedly sleeved with a mounting plate 43, and a horizontally arranged T-shaped spirit level 44 is fixed on the mounting plate 43. The T-shaped spirit level 44 is adapted to contact the elevator car floor to calibrate the levelness. The end of the telescopic rod 42 is connected to the measuring unit through a rotating unit. The rotating unit includes a universal joint 46 fixed to one end of the telescopic rod 42, and a second universal joint 47 fixed to the rotating end of the first universal joint 46. The measuring unit includes a measuring tape 48 fixed to the rotating end of the second universal joint 47, and the measuring tape 48 has a vertically arranged spirit level 49. In this embodiment, in addition to conventional measurement functions, the measuring unit is also used as a physical positioning reference for the visual inspection system. In use, by adjusting the angle between the first universal joint 46 and the second universal joint 47, the front end of the measuring tape 48 housing (or the end face of the hook) is made to be in a horizontal position and tightly abut against the side wall of the elevator car door knife (or car sill). At this time, the locked extension length of the telescopic rod 42 determines the fixed horizontal distance L1 from the center of the device to the car door knife, thus establishing a relative coordinate reference for subsequent dynamic visual calculations.

[0035] Reference Figure 4As shown, in order to make the distance detection device portable and easy to place, and improve the portability during operation, two sets of vertically arranged hanging rods 110 are fixed on the T-shaped fixed base 11, and a gripping rod 111 is rotatably arranged between the two sets of hanging rods 110. In use, the angle of the grip rod 111 can be adjusted by rotating it, making it easy to hold and retrieve the device with one or two hands. The symmetrical arrangement of the two sets of lifting rods 110 ensures balanced force when gripping, and the rotating structure allows for flexible adjustment of the grip angle according to operating habits. When storing, the grip rod 111 can be rotated to be parallel to the lifting rods 110, reducing the overall space occupied by the device. It achieves convenient retrieval and placement without the need for additional tools, and the rotating design can adapt to the gripping needs of different operating scenarios, fully meeting the device's requirements for portable operation and flexible storage.

[0036] like Figure 1 and Figure 9 As shown, a ranging component 5 is also fixed on the movable rod 22. This ranging component 5 is used to visually detect the gap between the door knife and the door ball during elevator operation. The ranging component 5 is mounted on the support component 1 via a folding unit 51. The folding unit 51 adopts a structural design similar to the aforementioned folding component 3. Its rotating sleeve can reciprocate 90 degrees relative to the fixed seat, thereby driving the entire ranging component 5 to switch between the storage state and the working state. A horizontal arm 52 is fixedly connected to the rotating sleeve of the folding unit 51. In order to adapt to the size of different elevator car tops and avoid obstacles such as door operators, a movable arm 53 that can slide along its length is fitted on the horizontal arm 52 and locked by fasteners. The two work together to form the first-stage horizontal telescopic structure.

[0037] A corner piece 54 is fixedly installed at the extended end of the movable arm 53. This corner piece 54 serves as a connecting node, and a vertical arm 55 is vertically inserted through it. The vertical arm 55 can be vertically displaced within the corner piece 54 and locked with fasteners to deliver the detection end to the vertical height plane where the door knife and door ball are located. A corner arm 56 is fixedly connected to the bottom end of the vertical arm 55. An L-shaped adjusting arm 57 is fitted onto the corner arm 56 along a straight direction and locked with fasteners. The lateral cutting depth of the detection end can be adjusted by the telescopic movement of the adjusting arm 57 relative to the corner arm 56. A slender extension arm 58 is connected to the end of the adjusting arm 57. This extension arm 58 is constructed to extend horizontally from the side into the narrow gap between the elevator car sill and the landing door sill without interference. A vision sensor 59 (such as an industrial camera or webcam) is installed at the end of the extension arm 58. Its lens is facing the landing door and is used to capture and record the position video or image data of the landing door ball in real time during elevator operation. This data is then used in conjunction with the system algorithm to perform dynamic measurement of the gap.

[0038] It should be noted that, in order to achieve real-time acquisition, power supply, and processing of image data, the vision sensor 59 is electrically connected to a data processing terminal (not shown in the figure, which may include a controller, battery, and wireless communication module, etc.). During detection operations, this data processing terminal is also placed and fixed in a stable position on the top of the elevator car (for example, it can be magnetically fixed to the sheet metal surface of the car top, or placed on an anti-slip mat next to the support component 1) to shorten the signal transmission line and prevent slippage during car movement. This data processing terminal receives video streams or image data captured by the vision sensor 59 and calculates the gap value between the door ball and the door knife in real time according to a preset visual algorithm. Simultaneously, the data processing terminal can wirelessly transmit the calculation results to a handheld display device located inside the car or in the machine room via a wireless transmission method (such as Bluetooth or Wi-Fi), thereby realizing an automatic detection and remote real-time monitoring operation mode for the elevator top.

[0039] Working Principle: In use, the device is first installed and roughly positioned. The operator climbs to the top of the elevator car and places the distance detection device at a suitable position on the car roof (near the car door). The suction cup unit of support assembly 1 is operated, the suction cup body 16 is pressed against the car roof surface, and the manual operating lever 18 is pressed to expel air and create negative pressure, achieving stable adhesion with the help of the sealing ring 19. Next, the displacement assembly 2 is operated, rotating the rotating ring 21 to drive the movable rod 22 and the entire assembly for fine-tuning the angle, so that the reference positioning assembly 4 is roughly aligned with the door knife direction. Then, the pressing end 23 is pressed down, overcoming the resistance of the return spring 24 to move the movable rod 22 down until the assembly height is suitable. The locking unit's knob lever 27 then drives the locking tongue 29 to engage with the locking plate 25, rigidly locking the vertical position of the movable rod 22, completing the basic fixing before detection.

[0040] After the foundation is fixed, the reference positioning component 4 is used to establish the coordinate reference for visual inspection. Pulling the extension end 416 upwards releases the locking of the insertion rod 415 onto the telescopic rod 42, extending the telescopic rod 42 towards the car door knife. Using the cooperation of universal joint one 46 and universal joint two 47, the angle of the measuring unit (measuring tape 48) is adjusted so that its front end of the housing or the end face of the hook is horizontal and firmly against the side wall of the car door knife (or car top sill). At this point, the extension end 416 is released, and under the action of the tension spring 417, the insertion rod 415 automatically resets and inserts into the corresponding fixing hole 412, locking the telescopic rod 42. At this point, the horizontal distance from the center of the device to the car door knife is physically locked to a fixed value L1, which will serve as a known reference parameter for subsequent dynamic calculations.

[0041] Finally, the ranging component 5 is unfolded for dynamic detection. The folding unit 51 is rotated 90 degrees to the working state. According to the specific structure of the car top, the extension length of the movable arm 53 is adjusted to avoid obstacles such as the car top door operator system. The descent height of the vertical arm 55 is adjusted to deliver the detection end to the vertical plane where the door knife and door ball are located. The lateral depth is adjusted by adjusting the adjusting arm 57. The slender extension arm 58 is horizontally extended into the narrow gap between the car sill and the landing door sill without interference, so that the vision sensor 59 is facing the landing door.

[0042] The system controls the elevator's operation, with vision sensor 59 capturing real-time images of the door rollers at the passing landings. Based on image analysis, the system calculates the real-time distance between vision sensor 59 and the door roller. Combining this with the established baseline distance L1 and the geometric dimensions of each robotic arm, the system indirectly calculates the actual dynamic gap between the car door knife and the landing door roller using an algorithm, thus achieving automatic, continuous, and precise detection across all floors.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A distance detection device, characterized in that, The device includes a support assembly (1) configured to be attached to the top of the elevator car; a displacement assembly (2) disposed on the support assembly (1) for providing vertical position and angle adjustment functions; a reference positioning assembly (4) connected to the support assembly (1) or the displacement assembly (2) for abutting against the side wall of the elevator car door knife or sill to determine the horizontal reference distance of the device body relative to the elevator car door knife; a visual ranging assembly (5) connected to the displacement assembly (2) configured to extend into the gap between the elevator car sill and the landing door sill, the visual ranging assembly (5) being provided with a visual sensor (59) configured to capture images of the landing door ball when the elevator is running; and a processing unit connected to the visual sensor (59) configured to receive image data and calculate the gap between the elevator car door knife and the landing door ball in combination with the horizontal reference distance. The visual ranging component (5) includes a multi-arm structure configured to bypass obstacles on the top of the elevator car and deliver the visual sensor (59) to the vertical plane where the door knife and the door ball are located. The multi-stage arm structure includes a horizontal arm (52) and a movable arm (53). The horizontal arm (52) is connected to the displacement component (2), and the movable arm (53) is sleeved on the horizontal arm (52) to form a first-stage horizontal telescopic structure. A vertical arm (55) is vertically inserted through a corner piece (54) at the end of the movable arm (53) for vertical displacement adjustment; a corner arm (56) and an adjusting arm (57) are provided, wherein the corner arm (56) is connected to the bottom end of the vertical arm (55) and the adjusting arm (57) is sleeved on the corner arm (56) in a straight line; and an extension arm (58) is connected to the end of the adjusting arm (57), wherein the extension arm (58) is constructed as a slender rod to extend into the detection gap, and the vision sensor (59) is installed at the end of the extension arm (58) with its lens facing the door direction; The displacement component (2) includes a rotating ring (21) and a vertically penetrating movable rod (22); the rotating ring (21) is rotatably mounted in the support component (1) via a bearing, and is used to drive the movable rod (22) to make fine angle adjustments; a return spring (24) is sleeved on the movable rod (22) and a pressing end (23) is provided; a locking plate (25) is provided on the side of the support component (1) or the rotating ring (21); a locking unit is provided on the pressing end (23); the locking unit is configured to cooperate with the locking plate (25) to fix the vertical position of the movable rod (22); the reference positioning component (4) and the visual ranging component (5) are both connected to the movable rod (22).

2. The distance detection device according to claim 1, characterized in that, The processing unit includes a data processing terminal, which is configured to be fixed on the top of the elevator car. The data processing terminal is used to receive video streams or image data captured by the vision sensor (59), calculate the distance from the vision sensor (59) to the landing door ball in real time according to a preset algorithm, and calculate the gap value between the door knife and the door ball in combination with the horizontal reference distance. The calculation results are then sent to the display device via wireless transmission.

3. The distance detection device according to claim 1, characterized in that, The visual ranging component (5) is mounted on the displacement component (2) via a folding unit (51). The folding unit (51) is configured to rotate 90 degrees relative to the displacement component (2) to switch between the storage state and the working state. The horizontal arm (52) is fixedly connected to the folding unit (51).

4. The distance detection device according to claim 1, characterized in that, The reference positioning component (4) includes a fixed rod (41) and a telescopic rod (42) movably disposed within the fixed rod (41). The end of the telescopic rod (42) is connected to a measuring unit via a universal joint assembly. The measuring unit includes a measuring tape (48). The reference positioning component (4) is configured to: adjust the extension length of the telescopic rod (42) and adjust the universal joint so that the front end of the housing or the end face of the measuring tape (48) is in a horizontal position and abuts against the side wall of the elevator car door knife or sill. At this time, the locked extension length of the telescopic rod (42) determines the horizontal reference distance.

5. A distance detection device according to claim 4, characterized in that, The fixed rod (41) is integrally provided with a hollow protrusion strip 1 (410) made of transparent material, and the telescopic rod (42) is provided with a protrusion strip 2 (411) adapted to slide within the protrusion strip 1 (410); the reference positioning component (4) also includes a fixing unit, which includes an mounting sleeve (413) and a fixing post (414) fixed to the end of the protrusion strip 1 (410), and an insert rod (415) that penetrates vertically through the fixing post (414). The protrusion strip 2 (411) is provided with multiple fixing holes (412) adapted to the bottom end of the insert rod (415), and the insert rod (415) is kept under downward locking force by a tension spring (417).

6. A distance detection device according to claim 5, characterized in that, The reference positioning component (4) is connected to the movable rod (22) through a folding component (3). The folding component (3) includes a fixed base (31), a spring piece (32), and a rotating sleeve (33). The rotating sleeve (33) can rotate 90 degrees relative to the fixed base (31) to achieve storage or unfolding. The reference positioning component (4) is connected to the waist plate (34) on the rotating sleeve (33) through a fixing ring (35).

7. A distance detection device according to claim 1, characterized in that, The support assembly (1) includes a T-shaped fixing seat (11), on which a suction cup unit is fixed by a folding unit; the folding unit includes at least three sets of hinge rods (12) hinged around the T-shaped fixing seat (11), one end of the hinge rod (12) is hinged to a support rod (13), and one end of the three sets of support rods (13) is hinged to a hinge seat (14), which is fixedly sleeved on the T-shaped fixing seat (11); the suction cup unit is configured to adhere to the top surface of the elevator car and forms a triangular support structure by unfolding the folding unit.

8. A distance detection device according to claim 7, characterized in that, The suction cup unit includes a suction cup body (16), on which two sets of symmetrically arranged connecting frames (17) are fixed. A mounting base (15) is connected between the two sets of connecting frames (17), and the mounting base (15) is fixed to one end of the hinge seat (14). A manual operating lever (18) is mounted on the suction cup body (16) for discharging air from the suction cup to form a negative pressure. A sealing ring (19) is mounted on the bottom of the suction cup body (16).

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