A steel tape measure automatic detection system and detection method

Abstract

The present invention relates to an automatic detection system and method for a steel tape measure, and belongs to the technical field of automatic detection of steel tape measures. The system comprises a support platform, a steel tape measure clamping device is slidably provided on the support platform, a tape measure end fixing device is provided on the end of the support platform, and scale lines are engraved on the table of the support platform, and the scale lines are arranged along the sliding direction of the steel tape measure clamping device. A second linear module is arranged in parallel with the support platform, a first bracket is fixed on the sliding part of the second linear module, and a camera device with a downwardly arranged lens is supported on the first bracket, and the camera device is located directly above the flat tape measure. The present invention takes pictures by using a camera device, and presents the comparison relationship between the tape measure scale and the standard scale of the support platform on the photo, and then automatically analyzes the accuracy of the tape measure through an image recognition system, without the need for manual labor, saving time and labor, and improving work efficiency and detection reliability.

Description

Technical Field

[0001] The invention belongs to the technical field of automatic detection of steel tape measures, and in particular relates to an automatic detection system and a detection method for a steel tape measure. Background Art

[0002] Steel tape measure is a commonly used measuring tool for measuring length. The precision and accuracy of the steel tape measure's engraved lines are crucial. Therefore, steel tape measures need to be calibrated during the production process, before leaving the factory, and after a period of use to determine their accuracy.

[0003] During the current inspection process of steel tape measures, users use microscopes to inspect them with the human eye. During this process, the adjustment of the screw rod is done manually, which is time-consuming and labor-intensive. At the same time, manual inspection is limited by the technical level of different inspectors and there are certain errors. Summary of the invention

[0004] The technical problem to be solved by the present invention is: to overcome the shortcomings of the prior art and provide a steel tape measure automatic detection system and detection method. The present invention takes pictures through a camera device, and presents the comparison relationship between the tape measure scale and the standard scale of the supporting platform on the photo, and then automatically analyzes the accuracy of the tape measure through an image recognition system, without the need for manual labor, saving time and effort, and improving work efficiency and detection reliability.

[0005] The technical solution adopted by the present invention to solve the problems existing in the prior art is:

[0006] A steel tape measure automatic detection system comprises a support platform, a steel tape measure clamping device is slidably provided on the support platform, a tape measure end fixing device is provided on the end of the support platform, and scale lines are engraved on the table surface of the support platform, and the scale lines are arranged along the sliding direction of the steel tape measure clamping device.

[0007] The steel tape measure clamping device is used to install and fix the steel tape measure body, and the tape measure end fixing device is used to fix the front end of the tape measure.

[0008] A second linear module is arranged in parallel with the support platform, a first bracket is fixed on the sliding part of the second linear module, and a camera device with a downwardly arranged lens is supported on the first bracket, and the camera device is located directly above the flat tape measure.

[0009] Preferably, the steel tape measure clamping device comprises an upper U-shaped plate with its opening facing the tape measure end fixing device, the upper U-shaped plate is used to clamp the steel tape measure body, and the upper U-shaped plate is slidably connected to the support platform.

[0010] Preferably, a lower U-shaped plate is fixed below the upper U-shaped plate, the opening of the lower U-shaped plate is arranged toward the second linear module, the lower U-shaped plate is clamped with the support platform, and the lower U-shaped plate is slidably connected with the support platform.

[0011] Preferably, a nut sleeve is provided at the bottom of the lower U-shaped plate, a screw threadedly connected to the nut sleeve is passed through the inside of the nut sleeve, the screw is arranged along the sliding direction of the steel tape clamping device, the end of the screw is connected to the output shaft of the motor, and the motor is fixedly connected to the support platform.

[0012] Preferably, two oppositely arranged clamps are provided inside the upper U-shaped plate, the clamps are arranged vertically, a spring is provided between each clamp and the U-shaped plate, a horizontally arranged sliding rod is fixed on the side of the clamp facing the U-shaped plate, and the sliding rod passes through the U-shaped plate.

[0013] Preferably, an inclined plate is provided on the top of the clamping plate, and the distance between the tops of the inclined plates above the two clamping plates is greater than the distance between the two clamping plates.

[0014] Preferably, the tape measure end fixing device comprises a magnet, which is used to magnetically attract the front end of the tape measure, and the attraction point is the zero point position.

[0015] Preferably, the magnet is fixed on an adjustment block, the adjustment block is connected to the support platform, and an upper pressing block and a lower pressing block which are clamped up and down are provided at the front end of the magnet.

[0016] Preferably, a first telescopic rod is connected to the top of the upper pressing block, a second telescopic rod is connected to the bottom of the lower pressing block, and the first telescopic rod and the second telescopic rod are fixedly connected to the adjusting block.

[0017] The steel tape measurement detection method comprises the following steps:

[0018] S1. The steel tape measure body is clamped inside the steel tape measure clamping device. The two clamping plates squeeze the steel tape measure body to fix it. The front end of the tape measure is pulled out through the opening of the upper U-shaped plate and attracted to the magnet.

[0019] S2, the steel tape clamping device moves, stretching the tape and laying it flat on the support platform;

[0020] S3. The camera moves to take photos of the tape measure and the scale lines, and uploads the photos to the back-end processing system, which analyzes the accuracy of the scale on the tape measure.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) Take photos through a camera device and analyze the photos to detect the accuracy of the tape measure, improve efficiency, reduce the degree of human interference, and ensure the accuracy of the detection.

[0023] (2) During the inspection of the tape measure scale, the inclination of the tape measure is determined and adjusted using a distance measuring device and a laser level to ensure that the tape measure is horizontally centered during the inspection process, thereby ensuring the accuracy of the inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 This is a structural diagram of an automatic detection system for steel tape measures of the present invention.

[0026] Figure 2 This is a partial enlarged diagram of the structure diagram of the automatic detection system for steel tape measure of the present invention.

[0027] Figure 3 for Figure 2 Right view of

[0028] Figure 4 for Figure 2 The main view,

[0029] Figure 5 This is a first cross-sectional view of an automatic detection system for a steel tape measure according to the present invention.

[0030] Figure 6 This is a second cross-sectional view of an automatic detection system for a steel tape measure according to the present invention.

[0031] Figure 7 This is a structural diagram of a steel tape measure clamping device in an automatic steel tape measure detection system of the present invention.

[0032] In the figure: 1-support platform, 101-groove, 102-scale line, 103-support tube, 2-upper U-shaped plate, 201-lower U-shaped plate, 202-nut sleeve, 3-clamp, 301-inclined plate, 302-slide rod, 303-block, 4-spring, 5-first linear module, 6-distance measuring device, 7-laser level, 8-camera device, 9-first bracket, 10-second linear module, 11-screw, 12-motor, 13-base, 14-third linear module, 15-adjustment block, 1501-heat dissipation hole, 16-magnet, 17-upper pressure block, 18-first telescopic rod, 19-second bracket, 20-lower pressure block, 21-second telescopic rod, 22-steel tape measure body, 2201-tape measure. DETAILED DESCRIPTION

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the technical field of the present application. The terms used herein are only for the purpose of describing specific implementation methods and are not intended to limit the present application embodiments.

[0034] In addition, in the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the drawings. Therefore, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0035] The following is a further detailed description of an automatic detection system and method for a steel tape measure of the present invention in conjunction with the accompanying drawings.

[0036] An automatic detection system for steel tape measures, comprising Figures 1 to 7 As shown, it includes a support platform 1. A steel tape clamping device is slidably provided on the support platform 1, and a tape end fixing device is provided on the end of the support platform 1. Scale lines 102 are engraved on the table surface of the support platform 1, and the scale lines 102 are arranged along the sliding direction of the steel tape clamping device. The tape end fixing device is at the zero point of the scale lines 102.

[0037] The steel tape measure clamping device is used to install and fix the steel tape measure body 22, and the tape measure end fixing device is used to fix the front end of the tape measure 2201.

[0038] A second linear module 10 is arranged parallel to the outer side of the support platform 1, and a base frame 13 is fixedly connected to the bottom of the support platform 1 and the second linear module 10. A first bracket 9 is fixed to the sliding part of the second linear module 10, and a camera device 8 with a downwardly arranged lens is supported on the first bracket 9, and the camera device 8 is located directly above the flat tape measure.

[0039] The steel tape measure clamping device comprises an upper U-shaped plate 2 with its opening facing the tape measure end fixing device. The upper U-shaped plate 2 is used to clamp the steel tape measure body 22 . The upper U-shaped plate 2 is slidably connected to the support platform 1 .

[0040] A lower U-shaped plate 201 is fixed below the upper U-shaped plate 2 . The opening of the lower U-shaped plate 201 is arranged toward the second linear module 10 . The lower U-shaped plate 201 is clamped with the support platform 1 , and the lower U-shaped plate 201 is slidably connected with the support platform 1 .

[0041] There are two ways of sliding connection:

[0042] 1. An electric linear module is provided below the support platform 1 , the sliding portion of the electric linear module is arranged downward, and the bottom surface of the lower U-shaped plate 201 is fixedly connected to the sliding portion of the electric linear module.

[0043] 2. The bottom of the lower U-shaped plate 201 is provided with a nut sleeve 202, and a screw 11 threadedly connected thereto is passed through the nut sleeve 202. The screw 11 is arranged along the sliding direction of the steel tape clamping device, and the end of the screw 11 is connected to the output shaft of the motor 12, and the motor 12 is fixedly connected to the support platform 1. A support tube 103 is protruded from the front and rear ends of the bottom surface of the support platform 1, and the screw 11 passes through the two support tubes 103. The two support tubes 103 are rotatably connected to the screw 11 and support the screw 11.

[0044] In order to better clamp and fix the steel tape measure body 22, two oppositely arranged clamping plates 3 are provided inside the upper U-shaped plate 2. The clamping plates 3 are arranged vertically. A spring 4 is provided between each clamping plate 3 and the U-shaped plate 2. A horizontally arranged sliding rod 302 is fixed on the side of the clamping plate 3 facing the U-shaped plate 2. The sliding rod 302 passes through the U-shaped plate 2. Under the thrust of the spring 4, the steel tape measure body 22 is clamped between the two clamping plates 3. The sliding rod 302 plays a guiding role. At least four sliding rods 302 are provided on each clamping plate 3. The spring 4 is provided between all the sliding rods 302. The sliding rod 302 can also prevent the spring 4 from shifting, ensuring that the axis of the spring 4 remains stationary.

[0045] When in use, the steel tape measure body 22 moves from top to bottom and is inserted between the two clamps 3. In order to facilitate insertion, an inclined plate 301 is provided on the top of the clamp 3. The distance between the tops of the inclined plates 301 above the two clamps 3 is greater than the distance between the two clamps 3.

[0046] At the same time, a clamping block 303 is protrudingly provided on the inner side of the front end of the upper U-shaped plate 2 at the clamping plate 3, and a gap is left between the bottom of the clamping block 303 and the top surface of the lower U-shaped plate 201 for the tape measure 2201 to move. When the two clamping plates 3 clamp the steel tape measure body 22, the two clamping blocks 303 block the steel tape measure body 22 to prevent the steel tape measure body 22 from escaping from the steel tape measure clamping device during the movement.

[0047] The tape measure end fixing device includes a magnet 16, which is used to magnetically attract the front end of the tape measure 2201, and the attraction point is the zero point. The magnet 16 is an electromagnet, which generates magnetic force after power is turned on to attract the front end of the tape measure 2201.

[0048] The magnet 16 is fixed on the adjustment block 15, and the adjustment block 15 is connected to the support platform 1. The front end of the magnet 16 is provided with an upper pressing block 17 and a lower pressing block 20 clamped together, and the tape measure 2201 is clamped between the upper pressing block 17 and the lower pressing block 20.

[0049] A first telescopic rod 18 is connected to the upper part of the upper pressing block 17, and a second telescopic rod 21 is connected to the bottom of the lower pressing block 20. The first telescopic rod 18 and the second telescopic rod 21 are fixedly connected to the adjustment block 15. The first telescopic rod 18 and the second telescopic rod 21 are both electric telescopic rods, and the first telescopic rod 18 is fixedly connected to the adjustment block 15 through a second bracket 19.

[0050] The adjusting block 15 is provided with a slide groove arranged up and down inside, and the lower pressing block 20 is slidably arranged inside the slide groove. There is a gap between the lower pressing block 20 and the magnet 16, and the gap is used to insert the front end of the tape measure 2201. The second telescopic rod 21 is arranged inside the slideway, and a plurality of heat dissipation holes 1501 are provided at the bottom of the slide groove.

[0051] In the process of inspecting the tape measure scale, there is still a problem, that is, the parallelism of the tape measure 2201. If the tape measure 2201 is tilted during the inspection, there will definitely be errors in the inspection results.

[0052] In order to solve the above problem, in this embodiment, a groove 101 is concavely formed on the top surface of the support platform 1, and the groove 101 is located directly below the tape measure 2201. A first linear module 5 is laid inside the groove 101, and the first linear module 5 adopts an electric linear module. A distance measuring device 6 is fixed on the sliding part of the first linear module 5, and the distance measuring device 6 adopts a laser distance measuring radar, and the laser emitting and receiving ends are arranged upward.

[0053] During use, after the measuring tape 2201 is unfolded, the distance measuring device 6 moves to measure the distance from the measuring tape 2201 at multiple positions. If the distances are the same, it proves that the measuring tape 2201 is arranged horizontally and there is no height difference. If the distances are different, the height of the end of the measuring tape 2201 is adjusted by controlling the length of the first telescopic rod 18 and the second telescopic rod 21, thereby achieving the parallel arrangement of the entire measuring tape 2201.

[0054] Meanwhile, a laser level 7 is provided on the first bracket 9 , an adjustment block 15 is slidably connected to the support platform 1 left and right, the adjustment block 15 is fixedly connected to the sliding part of the electric third linear module 14 , and the third linear module 14 is fixedly connected to the base frame 13 .

[0055] The laser emitted by the laser level 7 is irradiated on the tape measure 2201. By observing whether there is an angle between the laser line on the tape measure 2201 and the scale line above it, it is determined whether the tape measure 2201 is tilted left or right. If the laser line is parallel to or coincides with the scale line, the tape measure 2201 is arranged in the middle and does not tilt left or right; if there is an angle between the two, the tape measure 2201 tilts left or right. At this time, the position of the adjustment block 15 is adjusted by the third linear module 14 to center the tape measure 2201.

[0056] At the same time, during the accuracy detection of the tape measure 2201, the laser line at the irradiation point of the laser level 7 can be used as a calibration, through which the scale lines on the tape measure 2201 are correlated with the scale lines 102 on the support platform 1, which facilitates the analysis of the photos after the camera device 8 takes the photo.

[0057] A computer and a printer are connected to the outside of the support platform 1. The camera device is connected to the computer to transmit pictures to the computer. The picture analysis software inside the computer analyzes the pictures, determines the accuracy of the tape measure 2201, and prints the results through the printer.

[0058] A method for detecting a steel tape measure comprises the following steps:

[0059] S1, the steel tape measure body 22 is clamped inside the steel tape measure clamping device, the two clamping plates 3 squeeze the steel tape measure body 22 to fix it, and the front end of the tape measure 2201 is pulled out through the opening of the upper U-shaped plate 2 and attracted to the magnet 16;

[0060] S2, the steel tape clamping device moves, and the tape 2201 is stretched and laid flat on the support platform 1;

[0061] S3, the distance measuring device 6 moves, and the distances from the distance measuring device 6 are measured at multiple positions of the tape measure 2201. If the distances are the same, it proves that the tape measure 2201 is arranged horizontally and there is no height difference. If the distances are different, the height of the end of the tape measure 2201 is adjusted by controlling the length of the first telescopic rod 18 and the second telescopic rod 21, thereby achieving the parallel arrangement of the entire tape measure 2201.

[0062] S4. The laser from the laser level 7 is irradiated on the tape measure 2201. By observing whether there is an angle between the laser line on the tape measure 2201 and the scale line above it, it is determined whether the tape measure 2201 is tilted left or right. If the laser line is parallel to or coincides with the scale line, the tape measure 2201 is arranged in the middle and does not tilt left or right; if there is an angle between the two, the tape measure 2201 tilts left or right. At this time, the position of the adjustment block 15 is adjusted by the third linear module 14 to center the tape measure 2201.

[0063] S5, the camera device 8 moves to take pictures of the measuring tape 2201 and the scale line 102, and uploads the pictures to the back-end processing system, which is an image analysis software set on the computer. The back-end processing system analyzes the accuracy of the scale on the measuring tape 2201.

[0064] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A steel tape automatic detection system, characterized in that: The device comprises a support platform (1), a steel tape measure clamping device is slidably provided on the support platform (1), a tape measure end fixing device is provided on the end of the support platform (1), and scale lines (102) are engraved on the surface of the support platform (1), and the scale lines (102) are arranged along the sliding direction of the steel tape measure clamping device; The steel tape measure clamping device is used to install and fix the steel tape measure body (22), and the tape measure end fixing device is used to fix the front end of the tape measure (2201); The support platform (1) is arranged in parallel with a second linear module (10), a first bracket (9) is fixed on the sliding portion of the second linear module (10), and a camera device (8) with a lens facing downward is supported on the first bracket (9), and the camera device (8) is located directly above the flat tape measure; The tape measure end fixing device comprises a magnet (16), and the magnet (16) is used to magnetically attract the front end of the tape measure (2201), and the attraction point is the zero point position; The magnet (16) is fixed on the adjustment block (15), the adjustment block (15) is connected to the support platform (1), the front end of the magnet (16) is provided with an upper pressing block (17) and a lower pressing block (20) clamped together, and the measuring tape (2201) is clamped between the upper pressing block (17) and the lower pressing block (20); The upper part of the upper pressing block (17) is connected to a first telescopic rod (18), the lower part of the lower pressing block (20) is connected to a second telescopic rod (21), the first telescopic rod (18) and the second telescopic rod (21) are fixedly connected to the adjusting block (15), and the first telescopic rod (18) is fixedly connected to the adjusting block (15); The adjusting block (15) is provided with a slide groove arranged up and down inside, the lower pressing block (20) is slidably arranged inside the slide groove, there is a gap between the lower pressing block (20) and the magnet (16), the gap is used to insert the front end of the measuring tape (2201), and the second telescopic rod (21) is arranged inside the slide groove; A groove (101) is concavely provided on the top surface of the support platform (1), the groove (101) is located directly below the tape measure (2201), a first linear module (5) is laid inside the groove (101), a distance measuring device (6) is fixed on the sliding part of the first linear module (5), the distance measuring device (6) adopts a laser distance measuring radar, and the laser emitting and receiving ends are arranged upwards; The first bracket (9) is provided with a laser level (7); the adjustment block (15) is slidably connected to the support platform (1) left and right; the adjustment block (15) is fixedly connected to the sliding part of the electric third linear module (14); and the third linear module (14) is fixedly connected to the base frame (13).

2. The automatic detection system for steel tape measure according to claim 1, characterized in that: The steel tape measure clamping device comprises an upper U-shaped plate (2) arranged with its opening facing the tape measure end fixing device, the upper U-shaped plate (2) is used to clamp the steel tape measure body (22), and the upper U-shaped plate (2) is slidably connected to the support platform (1).

3. The automatic detection system for steel tape measure according to claim 2, characterized in that: A lower U-shaped plate (201) is fixed below the upper U-shaped plate (2), the opening of the lower U-shaped plate (201) is arranged toward the second linear module (10), the lower U-shaped plate (201) is clamped with the support platform (1), and the lower U-shaped plate (201) is slidably connected with the support platform (1).

4. The automatic detection system for steel tape measure according to claim 3, characterized in that: A nut sleeve (202) is provided at the bottom of the lower U-shaped plate (201), a screw (11) threadedly connected to the nut sleeve (202) is inserted into the nut sleeve (202), the screw (11) is arranged along the sliding direction of the steel tape clamping device, the end of the screw (11) is connected to the output shaft of the motor (12), and the motor (12) is fixedly connected to the support platform (1).

5. The automatic detection system for steel tape measure according to claim 2, 3 or 4, characterized in that: Two clamping plates (3) arranged opposite to each other are arranged inside the upper U-shaped plate (2). The clamping plates (3) are arranged vertically. A spring (4) is arranged between each clamping plate (3) and the U-shaped plate (2). A horizontally arranged sliding rod (302) is fixed on one side of the clamping plate (3) facing the U-shaped plate (2). The sliding rod (302) passes through the U-shaped plate (2).

6. The automatic detection system for steel tape measure according to claim 5, characterized in that: An inclined plate (301) is provided on the top of the clamping plate (3), and the distance between the tops of the inclined plates (301) above the two clamping plates (3) is greater than the distance between the two clamping plates (3).

7. The steel tape measure detection method of the steel tape measure automatic detection system according to claim 6, characterized in that: The following steps are involved: S1, the steel tape measure body (22) is clamped inside the steel tape measure clamping device, the two clamping plates (3) squeeze the steel tape measure body (22) to fix it, and the front end of the tape measure (2201) is pulled out through the opening of the upper U-shaped plate (2) and attracted to the magnet (16); S2, the steel tape clamping device moves, and the tape (2201) is stretched and laid flat on the supporting platform (1); S3, the camera device (8) moves to take photos of the measuring tape (2201) and the scale lines (102), and uploads the photos to the back-end processing system, which analyzes the accuracy of the scale on the measuring tape (2201).

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