Drawer type machine vision temperature and humidity meter dial reading device

Abstract

The invention belongs to the technical field of instrument detection equipment, and particularly relates to a drawer type machine vision temperature and humidity meter dial reading device which comprises a rack, a Y-axis sliding table is fixed to the right end in the rack, and a Y-axis electric sliding table is fixed to the left end in the rack. The temperature and humidity dial reading device based on machine vision adopts modular design, different types of instrument brackets are replaced according to different types of instruments, and the temperature and humidity dial reading device can adapt to various instruments. The electric sliding table driven by the closed-loop stepping motor is accurate and reliable in movement positioning, low in temperature rise and small in disturbance to a temperature field. The whole device is simple in structure, small in size, low in cost and small in temperature field disturbance. Different measurement requirements can be met by matching with different detection software, the labor intensity of workers in existing temperature and humidity instrument verification work is reduced, manual reading errors are reduced, and the new requirement for unattended operation in the whole verification process is met.

Description

Technical Field

[0001] This invention relates to the field of instrument testing equipment technology, specifically a drawer-type machine vision thermometer and hygrometer dial reading device. Background Technology

[0002] Temperature and humidity meters are instruments and devices used to measure, display, record and transmit ambient temperature and relative humidity data in real time. Their core function is to accurately capture changes in temperature and humidity, providing data support for environmental control, quality management and safety assurance in various scenarios. They are basic monitoring tools in industrial production, daily life and scientific research experiments.

[0003] Currently, the calibration of temperature and humidity instruments still relies primarily on manual reading. This requires dedicated personnel to be on-site during the calibration process and to record readings promptly. The following problems exist in the instrument calibration process:

[0004] There are many types and shapes of existing temperature and humidity instruments, which are inconvenient to place.

[0005] The existing calibration equipment has a narrow operating area and a long depth. The instruments inside the box are stacked vertically. When a reading is needed, the instrument to be tested must be moved manually from the operating port to a visible area, which is inconvenient. At the same time, it may touch other instruments, causing damage to the instrument's appearance or mechanical failure.

[0006] The dial of an analog instrument has unevenly divided scales and different graduations. When reading the scale, there is a subjective factor that can lead to a certain deviation in the reading.

[0007] The testing process usually lasts 1-2 days, which is time-consuming and requires a lot of manpower. The testing process requires dedicated personnel to be on duty.

[0008] To address these issues, a drawer-type machine vision thermometer and hygrometer dial reading device is proposed. Summary of the Invention

[0009] The purpose of this invention is to provide a drawer-type machine vision temperature and humidity meter dial reading device to solve the problems mentioned in the background art.

[0010] To achieve the above objectives, the present invention provides the following technical solution: a drawer-type machine vision temperature and humidity meter dial reading device, comprising a frame, a Y-axis slide fixed at the right end of the frame, a Y-axis electric slide fixed at the left end of the frame, a fork motion module slidably connected between the Y-axis slide and the Y-axis electric slide, symmetrical drawer slides fixed at the lower ends of the Y-axis slide and the Y-axis electric slide inside the frame, a drawer frame fixed at the right ends of the two drawer slides, evenly arranged meter clamp slides fixed at the upper ends of the two drawer slides, a meter clamp module slidably connected to the upper ends of the meter clamp slides, a meter clamp position sensor mounting bracket fixed at the upper left end of the drawer slide, a meter clamp position sensor fixed inside the meter clamp position sensor mounting bracket, and a stop edge fixed at the front end of the meter clamp slide.

[0011] Preferably, a cable cover is fixed to the upper end of the fork motion module.

[0012] Preferably, the watch clip module includes two watch clip sliders, both of which are slidably connected inside the watch clip slide rail. An instrument fixing bracket is fixed to the upper side of both watch clip sliders. A magnetic hanging bracket is provided on the front side of the instrument fixing bracket. A watch clip reset sensing plate is fixed to the left side of the instrument fixing bracket. An anti-collision magnet is fixed to the left side of the watch clip reset sensing plate.

[0013] Preferably, symmetrical nameplates are fixed to the front side of the instrument mounting bracket.

[0014] Preferably, the fork motion module includes an X-axis electric slide, with an active side connecting bracket fixed to the left end of the X-axis electric slide and a driven side connecting bracket fixed to the right end of the X-axis electric slide. The active side connecting bracket is slidably connected to the outside of the Y-axis electric slide, and the driven side connecting bracket is slidably connected to the outside of the Y-axis slide. A limit sensor is fixed to the left end of the front side of the X-axis electric slide. A rigid fork and an elastic fork are slidably connected to the lower end of the X-axis electric slide. A camera bracket is fixed to the right end of the outside of the X-axis electric slide. A camera X-axis adjustment plate is fixed to the front side of the camera bracket. A camera Y-axis adjustment plate is fixed to the lower side of the camera X-axis adjustment plate. Camera mounting brackets are fixed to both sides of the camera Y-axis adjustment plate. A camera is fixed between the two camera mounting brackets. A fill light bracket is fixed to the left and right sides of the camera X-axis adjustment plate, and a fill light strip is fixed to the rear end of the fill light bracket.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The machine vision-based temperature and humidity meter reading device of this invention adopts a modular design, allowing for compatibility with various instruments by replacing different instrument brackets according to different instrument types. It utilizes a closed-loop stepper motor-driven electric slide, ensuring accurate and reliable motion positioning, low temperature rise, and minimal disturbance to the temperature field. The entire device features a simple structure, small size, low cost, and minimal temperature field disturbance. By combining it with different detection software, it can meet various measurement requirements, reducing the labor intensity of personnel in the calibration of existing temperature and humidity instruments, minimizing manual reading errors, and fulfilling the new requirement of unattended operation throughout the entire calibration process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a structural diagram of the watch clip module and its matching slide rail slider;

[0019] Figure 3 This is a schematic diagram of the shift fork motion module.

[0020] In the diagram: 1. Frame; 2. Cable cover; 3. Shift fork motion module; 4. Y-axis slide; 5. Y-axis electric slide; 6. Gauge clamp position sensor; 7. Gauge clamp position sensor mounting bracket; 8. Edge guard; 9. Drawer slide rail; 10. Drawer frame; 11. Gauge clamp slide rail; 12. Gauge clamp module; 121. Nameplate; 122. Instrument fixing bracket; 123. Magnetic hanger; 124. Gauge clamp reset sensor; 125. Anti-collision magnetic pot; 126. Gauge clamp slider; 301. Active side connecting bracket; 302. Limit sensor; 303. X-axis electric slide; 304. Camera bracket; 305. Slave side connecting bracket; 306. Rigid shift fork; 307. Flexible shift fork; 308. Fill light strip; 309. Fill light bracket; 310. Camera X-axis adjustment plate; 311. Camera Y-axis adjustment plate; 312. Camera fixing bracket; 313. Camera. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] Example:

[0024] Please see Figure 1-3 The present invention provides a technical solution:

[0025] A drawer-type machine vision temperature and humidity meter dial reading device includes a frame 1. A Y-axis slide 4 is fixed to the right end inside the frame 1, and a Y-axis electric slide 5 is fixed to the left end inside the frame 1. A fork motion module 3 is slidably connected between the Y-axis slide 4 and the Y-axis electric slide 5. Symmetrical drawer slide rails 9 are fixed to the lower end of the Y-axis slide 4 and the Y-axis electric slide 5 inside the frame 1. A drawer frame 10 is fixed to the right end of the two drawer slide rails 9. Evenly arranged meter clamp slide rails 11 are fixed to the upper end of the two drawer slide rails 9. A meter clamp module 12 is slidably connected to the upper end of the meter clamp slide rails 11. A meter clamp position sensor mounting bracket 7 is fixed to the upper left end of the drawer slide rail 9. A meter clamp position sensor 6 is fixed inside the meter clamp position sensor mounting bracket 7. A stop edge 8 is fixed to the front end of the meter clamp slide rail 11.

[0026] The frame 1 is constructed from aluminum profiles, with each layer having its own independent mechanical mechanism and supporting detection and motion control devices. Taking a single layer as an example, it can be divided into an upper fixed part and a lower pull-out part. The main components of the upper fixed part include a Y-axis electric slide 5, a cable cover 2, a shift fork motion module 3, a Y-axis slide 4, a dial indicator clamp position sensor 6, and its supporting fixed bracket; the lower pull-out part includes a retaining edge 8, a drawer slide rail 9, a drawer frame 10, a dial indicator clamp slide rail 11, and a dial indicator clamp module 12.

[0027] The upper fixed part of the Y-axis slide 4 is connected to the frame via angle brackets, and is also fixed to the frame with screws. The Y-axis slide 4 and the Y-axis electric slide 5 are arranged parallel to each other along the Y-axis direction, and their slider mounting surfaces are on the same plane. One end of the shift fork motion module 3 is bolted to the slider of the Y-axis electric slide 5 via the active side connecting bracket, and the other end is bolted to the slider of the Y-axis slide 4 via the driven side connecting bracket. The reciprocating motion of the shift fork motion module 3 in the Y-axis direction is achieved by controlling the reciprocating motion of the Y-axis electric slide 5.

[0028] The shift fork motion module 3 uses an X-axis electric slide 303 as the main beam, with the driving and driven side connecting brackets fixed at both ends by bolts. A camera mounting bracket 312 is also fixed on the X-axis electric slide 303, which can be adjusted left and right in the X-axis direction. A sliding supplementary light bracket 309 is mounted on the inclined arm of the camera mounting bracket 312. The supplementary light bracket 309 can adjust the pitch angle and is fixed to the supplementary light strip 308 by bolts. The supplementary light strip 308 can be adjusted in position in the X-axis direction. By adjusting the pitch angle and position of the supplementary light bracket 309, glare from the supplementary light on the instrument panel surface can be minimized. One end of the camera mounting bracket 312 is connected to the X-axis electric slide 303, and the other end is connected to the camera X-axis adjustment plate by bolts. The camera X-axis adjustment plate is then bolted to the camera Y-axis adjustment plate. One end of the camera mounting bracket 312 is fixed to the camera Y-axis adjustment plate by bolts, and the other end is connected to the camera 313 by bolts. Since both the camera's X-axis and Y-axis adjustment plates are designed with slots, the camera's position in the X and Y axes can be adjusted by adjusting the corresponding fastening bolts in the slots. The camera mounting bracket 312 ensures that the camera image is always on a vertical plane. Limit sensors 302 are fixed on the left and right connecting brackets of the X-axis electric slide 303. The stop position of the shift fork in the X-axis direction can be adjusted by adjusting the corresponding sensing plates. There are two types of shift forks: a rigid shift fork 306 and a flexible shift fork 307. The flexible shift fork 307 allows for operation beyond the limit when pushing or pulling the dial gauge module 12, ensuring that the dial gauge module 12 returns to its original position without damaging the shift fork motion module 3, thus resolving the issue of the dial gauge module 2 not returning to its original position.

[0029] The lower pull-out section is a rectangular drawer support made of aluminum profiles connected by angle brackets. Drawer slides 9 are fixed to both sides of the drawer support 10, and the other side of the drawer slides 9 is bolted to the frame of the entire machine. Multiple dial indicator slides 11 are evenly spaced along the X-axis on the upper surface of the drawer support 9. These slides are fixed to the drawer support with screws. The number of dial indicator slides 11 is determined by the depth of the calibration equipment. Two dial indicator sliders 126 are fitted onto each dial indicator slide 11. The dial indicator module 12 and the dial indicator sliders are connected together by bolts, allowing the dial indicator module 12 to move along the X-axis on the dial indicator slide 11.

[0030] The function of the clamp module 12 is to mount the temperature and humidity meter under test. It mainly consists of a nameplate 121, an instrument mounting bracket 122, a magnetic hanger 123, a clamp reset sensor 124, and an anti-collision magnet 125. The magnetic surface of the instrument mounting bracket 122 has three grooves, which restrict the magnetic hanger 123 to be adjusted up and down within the grooves after it is attached to the instrument mounting bracket 122. The magnetic hanger 123 is fixed with a flat-head screw for mounting the temperature and humidity meter under test. The magnetic surface of the instrument mounting bracket 122 has a small hole and a multi-radius concentric waist-shaped hole around it. When the instrument mounting bracket 122 is pushed to the detection position, the small hole and the axis of the camera 313 are concentric, ensuring that the dial of the temperature and humidity meter under test is at the center of the field of view of the camera 313, reducing reading errors. Since the temperature and humidity meter dials are of different sizes, the position of the instrument hanger can be manually adjusted up and down according to the actual situation to keep the dial as close to the center of the field of view as possible. The concentric waist-shaped hole serves as an auxiliary positioning function. When calibrating small digital temperature and humidity meters, one or two meters can be mounted on the same clamp module depending on their size, increasing the number of meters that can be calibrated and improving efficiency. The clamp module 12 is equipped with an anti-collision magnet 125 and a clamp reset sensor 124 on its side. The anti-collision magnet 125 ensures that the clamp module 12 can be stably attached to the stop edge, allowing the fork movement module 3 to move smoothly in the Y-axis direction without being blocked by the clamp module 12. The clamp reset sensor 124 triggers the clamp position sensor after the clamp module 12 resets, ensuring that the clamp returns to its original position and does not obstruct the fork movement module 3. Simultaneously, if the drawer slide rail 9 is not reset, the clamp position sensor 6 will not be triggered, thus ensuring the accuracy and reliability of the clamp module 12's Y-axis position and preventing the fork movement module 3 from being pushed incorrectly or without proper positioning.

[0031] The upper end of the fork motion module 3 is fixed with a cable cover 2.

[0032] The meter clip module 12 includes two meter clip sliders 126, both of which are slidably connected inside the meter clip slide rail 11. The upper sides of the two meter clip sliders 126 are jointly fixed with an instrument fixing bracket 122. A magnetic hanger 123 is provided on the front side of the instrument fixing bracket 122. A meter clip reset sensor 124 is fixed on the left side of the instrument fixing bracket 122, and an anti-collision magnet 125 is fixed on the left side of the meter clip reset sensor 124.

[0033] Symmetrical nameplates 121 are fixed to the front side of the instrument mounting bracket 122.

[0034] The shift fork motion module 3 includes an X-axis electric slide 303. An active-side connecting bracket 301 is fixed to the left end of the X-axis electric slide 303, and a driven-side connecting bracket 305 is fixed to the right end of the X-axis electric slide 303. The active-side connecting bracket 301 is slidably connected to the outside of the Y-axis electric slide 5, and the driven-side connecting bracket 305 is slidably connected to the outside of the Y-axis slide 4. A limit sensor 302 is fixed to the left end of the front side of the X-axis electric slide 303, and a rigid shift fork 306 and an elastic shift fork 307 are slidably connected to the lower end of the X-axis electric slide 303. A camera bracket 304 is fixed to the right end of the X-axis electric slide 303. A camera X-axis adjustment plate 310 is fixed to the front of the camera bracket 304. A camera Y-axis adjustment plate 311 is fixed to the lower side of the camera X-axis adjustment plate 310. Camera mounting brackets 312 are fixed to both sides of the camera Y-axis adjustment plate 311. A camera 313 is fixed between the two camera mounting brackets 312. A fill light bracket 309 is fixed to the left and right sides of the camera X-axis adjustment plate 310. A fill light strip 308 is fixed to the rear end of the fill light bracket 309.

[0035] Working principle:

[0036] First, let's describe the initial state of the device: the drawer frame 10 is in the retracted state, the watch clip module 12 is placed on the left side and is attracted to the guard edge 8 by the anti-collision magnet 125, and its watch clip reset sensor 124 triggers the corresponding watch clip positioning sensor 6. The fork of the shift fork motion module 3 is on the left side of the module and is located at the rear of the frame 1, and the rigid shift fork 306, the elastic shift fork 307 and the watch clip module 12 are on the same plane in the XZ plane;

[0037] First, pull out the drawer frame 10, install the temperature and humidity meter to be tested on the meter clip module 12, and adjust the position of the magnetic hanger 123 to place the meter in a suitable position. Then, push the meter clip module 12 to the left until the anti-collision magnet 125 is attracted to the guard edge 8. After all the meter clips are hung, push the drawer frame 10 back into place, and the meter clip positioning sensor 6 is triggered.

[0038] When the device is running, the supplementary light strip 308 is turned on, and the rigid shift fork 306 and the elastic shift fork 307 push the instrument module below it to the right. The movement stops when the center of the instrument clamp module 12 is on the central axis of the camera 313. After the camera 313 finishes taking pictures, the rigid shift fork 306 and the elastic shift fork 307 push the instrument clamp module 12 back to the left. The X-axis electric slide 303 of the shift fork motion module 3 is driven by a closed-loop stepper motor. The position of the shift fork fixed on the X-axis electric slide 303 can be accurately positioned. Since the right shift fork fixed on the X-axis electric slide 303 is an elastic shift fork 307, it can move beyond its range when the shift fork returns to its original position. At this time, the elastic shift fork 307 undergoes elastic deformation, allowing the instrument module it is pushing to return to its original position under the push of the elastic force of the elastic shift fork 307, and causing the anti-collision magnet 125 on the instrument clamp module 12 to be attracted to the stop edge 8, while triggering the instrument clamp positioning sensor 6. The presence of the flexible shift fork 307 can eliminate the adverse effects of the dimensional tolerance of the watch clip module 12 on the X-axis, and can appropriately increase the distance between the left and right shift forks, so that the shift fork motion module 3 can move more smoothly in the Y-axis direction, reducing the risk of collision between the shift fork and the watch clip module 12.

[0039] After the watch clamp module 12 returns to its original position, the Y-axis electric slide 5 is controlled to drag the shift fork motion module 3 along the Y-axis to the previous watch clamp module 12. The Y-axis electric slide 5 also adopts a closed-loop stepper motor deceleration drive method, and the position of the shift fork motion module 3 it drags on the Y-axis is accurate. Therefore, after the Y-axis electric slide 5 travels to the distance between the front and rear of the watch clamp module 12, the shift fork motion module 3 it drags can accurately push the watch clamp module 12 to move left and right.

[0040] Repeat the above movements from back to front along the Y-axis until all the placed instruments have been photographed. Then, the shift fork movement module 3 retracts along the Y-axis to the last instrument clamp module 12, completing one image acquisition cycle.

[0041] Since the nameplate 121 can be affixed or laser-printed with a unique number, after binding it to the corresponding instrument, manual or automatic readings can be performed using captured images. Manual readings utilize remote control software to acquire instrument images and QR code information. The instrument images are zoomed, panned, calibrated, and referenced using tools to assist manual reading. The software then binds the readings and QR codes to generate reports. Automatic readings employ technologies such as meter type recognition, pointer extraction, scale extraction, OCR recognition, and reading estimation to automatically acquire instrument readings. The automatically acquired readings are automatically bound to the QR code information, and reports are generated.

[0042] It should be noted that the electrical components mentioned in this invention have had their wiring harnesses combed according to actual conditions during manufacturing, so that the wiring harnesses will not be tangled or affect the operation.

[0043] All standard parts used in this invention can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The control method of this invention is through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming. It should be noted that the electrical components mentioned in this invention have been sorted according to the actual situation during manufacturing, so as not to cause the wire harness to become tangled or affect the operation. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0044] In the description of this invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or basic characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of the invention is defined by the appended claims rather than the foregoing description. Therefore, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drawer-type machine vision thermo-hygrometer dial reading device, comprising a frame (1), characterized in that, A Y-axis slide (4) is fixed at the right end inside the frame (1), and a Y-axis electric slide (5) is fixed at the left end inside the frame (1). A fork motion module (3) is slidably connected between the Y-axis slide (4) and the Y-axis electric slide (5). Symmetrical drawer slides (9) are fixed at the lower ends of the Y-axis slide (4) and the Y-axis electric slide (5) inside the frame (1). A drawer frame (10) is fixed at the right ends of the two drawer slides (9). A watch clip slide (11) is evenly arranged at the upper ends of the two drawer slides (9). A watch clip module (12) is slidably connected at the upper end of the watch clip slide (11). A watch clip position sensor mounting bracket (7) is fixed at the upper left end of the drawer slide (9). A watch clip position sensor (6) is fixed inside the watch clip position sensor mounting bracket (7). A stop (8) is fixed at the front end of the watch clip slide (11).

2. The drawer-type machine vision temperature and humidity meter dial reading device according to claim 1, characterized in that: The upper end of the fork motion module (3) is fixed with a cable cover (2).

3. The drawer-type machine vision temperature and humidity meter dial reading device according to claim 1, characterized in that: The watch clip module (12) includes two watch clip sliders (126), both of which are slidably connected inside the watch clip slide rail (11). The upper sides of the two watch clip sliders (126) are jointly fixed with an instrument fixing bracket (122). A magnetic hanging bracket (123) is provided on the front side of the instrument fixing bracket (122). A watch clip reset sensing plate (124) is fixed on the left side of the instrument fixing bracket (122), and an anti-collision pot magnet (125) is fixed on the left side of the watch clip reset sensing plate (124).

4. The drawer-type machine vision temperature and humidity meter dial reading device according to claim 3, characterized in that: Symmetrical nameplates (121) are fixed to the front side of the instrument mounting bracket (122).

5. The drawer-type machine vision temperature and humidity meter dial reading device according to claim 1, characterized in that: The shift fork motion module (3) includes an X-axis electric slide (303). An active-side connecting bracket (301) is fixed to the left end of the X-axis electric slide (303), and a driven-side connecting bracket (305) is fixed to the right end of the X-axis electric slide (303). The active-side connecting bracket (301) is slidably connected to the outside of the Y-axis electric slide (5), and the driven-side connecting bracket (305) is slidably connected to the outside of the Y-axis slide (4). A limit sensor (302) is fixed to the left end of the front side of the X-axis electric slide (303), and a rigid shift fork (306) and an elastic shift fork (307) are slidably connected to the lower end of the X-axis electric slide (303). A camera bracket (304) is fixed to the right end of the X-axis electric slide (303). A camera X-axis adjustment plate (310) is fixed to the front side of the camera bracket (304). A camera Y-axis adjustment plate (311) is fixed to the lower side of the camera X-axis adjustment plate (310). Camera mounting brackets (312) are fixed to both sides of the camera Y-axis adjustment plate (311). A camera (313) is fixed between the two camera mounting brackets (312). A fill light bracket (309) is fixed to the left and right sides of the camera X-axis adjustment plate (310). A fill light strip (308) is fixed to the rear end of the fill light bracket (309).

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