A handheld laser range finder indoor calibration device

Abstract

The application belongs to the technical field of measurement and detection, and relates to a handheld laser range finder indoor calibration device, which comprises a work platform, a detection mechanism and an adjusting mechanism are installed on the work platform, the detection mechanism comprises a lifting platform arranged on the work platform, the lifting platform is controlled to lift by a hydraulic cylinder arranged at the bottom of the work platform, a plurality of detection discs are arranged on the lifting platform in a stacking mode from top to bottom, a laser entrance is arranged on each detection disc, the laser entrance is arranged eccentrically, the inner wall of the detection disc is a laser high-reflection arc surface, and a laser shield is arranged on the laser high-reflection arc surface, the overall structure of the device is compact, the handheld laser range finder is adjusted to complete detection of various parameters, the device has the advantages of high precision, fast response and good stability, can meet the measurement requirements of the handheld laser range finder, and greatly improves work efficiency.

Description

Technical Field

[0001] This invention belongs to the field of metrological verification technology, and specifically relates to an indoor verification device for a handheld laser rangefinder. Background Technology

[0002] Handheld laser rangefinders can be divided into short-range handheld laser rangefinders (measuring distances of 40-250 meters) and long-range telescopic handheld laser rangefinders (measuring distances of 500-3000 meters). With technological advancements, handheld laser rangefinders are increasingly widely used in fields such as building surveying, topographic mapping, and robot positioning. Currently, the metrological verification of handheld laser rangefinders is conducted according to the "JJG 966-2010 Verification Procedure for Handheld Laser Rangefinders." Because the testing involves multiple measurement segments and long distances, a large space is required, making indoor testing impossible. Summary of the Invention

[0003] The purpose of this invention is to address the technical problems existing in the prior art by proposing an indoor calibration device for a handheld laser rangefinder; the technical solution adopted to achieve the above objective is:

[0004] An indoor calibration device for a handheld laser rangefinder includes a working platform, on which a detection mechanism and an adjustment mechanism are installed. The detection mechanism includes a lifting platform mounted on the working platform, which is controlled to rise and fall by a hydraulic cylinder located at the bottom of the working platform. Multiple detection discs are mounted on the lifting platform, arranged in a top-to-bottom order. Each detection disc is provided with a laser entrance port, which is eccentrically positioned. The inner wall of the detection disc is a laser-high reflectivity arc-shaped surface, and a laser blocking object is provided on the laser-high reflectivity arc-shaped surface.

[0005] The adjustment mechanism is used to adjust the state of the laser rangefinder under test. The laser line emitted by the laser rangefinder under test enters the detection disk through the laser entrance port. After being reflected multiple times in the laser high reflectivity arc surface, it finally illuminates the laser blocking object and is returned along the same path, entering the laser rangefinder again, thereby measuring the distance of the laser blocking object.

[0006] Preferably, the optical path length of the laser line in each detection disk is different.

[0007] Preferably, the adjustment mechanism includes a slide rail and an H-shaped frame. The space above the H-shaped frame is the working space, and the space below the H-shaped frame is the slide rail space. The slide rail is located within the slide rail space, and the H-shaped frame is slidably connected to the slide rail. A movable support plate is provided in the working space. One end of the movable support plate is hinged to the H-shaped frame, and a load-bearing plate is fixed below the other end of the movable support plate. An adjusting bolt is threaded onto the other end of the movable support plate, and the adjusting bolt passes through the movable support plate and rests against the load-bearing plate. Positioning bolts are provided on both sides of the H-shaped frame in the working space, and the positioning bolts pass through both sides of the H-shaped frame and extend into the working space.

[0008] Preferably, the top of the slide rail is provided with a scale value for marking the moving position of the H-shaped frame, and the middle connecting plate of the H-shaped frame is provided with a strip-shaped cutout for observing the scale value.

[0009] Preferably, a set of parallel marking lines is provided on the other end of the movable support plate.

[0010] Preferably, a marking line is provided within the strip-shaped cutout.

[0011] Preferably, a handle for pulling motion is provided on the end face of the H-shaped frame.

[0012] Preferably, a rubber positioning head is provided at the inner end of the positioning bolt.

[0013] The beneficial effects of the present invention are as follows: (1) The present invention achieves an effective replacement of laser measurement distance by setting up a detection disk, and the detection can be completed indoors.

[0014] (2) By superimposing multiple detection disks with different measurement distances, the requirements for multiple distance measurement segments in the verification procedure are met.

[0015] (3) The present invention has a compact overall structure. The adjustment of the handheld laser rangefinder is used to complete the detection of various parameters. The device has the advantages of high precision, fast response and good stability, which can meet the measurement needs of the handheld laser rangefinder and greatly improve work efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the mechanism of the present invention;

[0017] Figure 2 for Figure 1 Top view;

[0018] Figure 3 for Figure 2 Left view of the adjustment mechanism. Detailed Implementation

[0019] The present invention will now be further described with reference to the accompanying drawings.

[0020] like Figure 1 As shown, the present invention includes a working platform 1, on which a detection mechanism A and an adjustment mechanism B are installed. The detection mechanism A includes a lifting platform set on the working platform 1. The lifting platform is controlled to lift by a hydraulic cylinder A2 set at the bottom of the working platform 1. Multiple detection discs A1 are installed on the lifting platform and stacked from top to bottom. Each detection disc 1 is provided with a laser entrance port A3. The laser entrance port A3 is eccentrically set. The inner wall of the detection disc A1 is a laser high reflectivity arc surface. A laser blocking object A4 is provided on the laser high reflectivity arc surface.

[0021] like Figure 2 As shown, the adjustment mechanism B is used to adjust the state of the laser rangefinder B11 under test. The laser line 2 emitted by the laser rangefinder B11 enters the detection disk A1 through the laser entrance A3. After multiple reflections in the high-reflectivity arc surface, it finally illuminates the laser blockage object A4 and is returned along the same path, re-entering the laser rangefinder B11, thereby measuring the distance of the laser blockage object A4. At the same time, the position of the laser blockage object A4 is adjusted to change the number of times the laser is reflected in the detection disk A1, thereby changing the optical path length of the laser line in each detection disk A1 to achieve standard segment measurement of different distances.

[0022] like Figure 2 and Figure 3 As shown, the adjustment mechanism B includes a slide rail B14 and an H-shaped frame B3. The space above the H-shaped frame B3 is the working space, and the space below the H-shaped frame B3 is the slide rail space. The slide rail B14 is located within the slide rail space, and the H-shaped frame B3 is slidably connected to the slide rail B14. A locking bolt B5 is provided on the H-shaped frame B3 for fixing it to the slide rail B14. A movable support plate B2 is provided within the working space. One end of the movable support plate B2 is hinged to the H-shaped frame B3, for example, by a hinge shaft B7, or other hinge connections can be used. The structure includes a load-bearing plate B13 fixed below the other end of the movable support plate B2. Two adjusting bolts B1 are threaded onto the other end of the movable support plate B2. The adjusting bolts B1 pass through the movable support plate B2 and rest against the load-bearing plate B13. The front end of the adjusting bolts B1 is spherical. Positioning bolts B4 are provided on both sides of the H-shaped frame B3 in the working space. There are two positioning bolts B4 on each side. The positioning bolts B4 pass through both sides of the H-shaped frame B3 and extend into the working space. At the same time, a rubber positioning head B6 is provided at the inner end of the positioning bolts B4.

[0023] The top of the slide rail B14 is provided with a scale value B10 for marking the moving position of the H-shaped frame B3. The middle connecting plate of the H-shaped frame B3 is provided with a strip-shaped cutout B12 for observing the scale value B10. At the same time, a marking line B9 is provided in the strip-shaped cutout B12. The end face of the H-shaped frame B3 is provided with a handle B8 for pulling its movement.

[0024] In use, the present invention first places the handheld laser rangefinder B11 to be tested on the movable support plate B2, and pre-fixes the handheld laser rangefinder B11 by rotating the four positioning bolts B4. Then, referring to the parallel marker line group B15, the four positioning bolts B4 are rotated to make fine adjustments until the laser line emitted by the handheld laser rangefinder B11 is parallel to the parallel marker line group B15. Next, the two adjusting bolts B1 are rotated to make fine adjustments to the pitch angle of the handheld laser rangefinder B11 to ensure that the laser line is perpendicularly entered into the laser entrance port A3, thereby completing the detection of a measurement distance.

[0025] Then, the hydraulic cylinder A2 moves to lift the platform, so that the position of another detection disc A1 corresponds to the handheld laser rangefinder B11 to be tested, allowing the laser line to enter the laser entrance port A3 of the detection disc A1, thus completing the test; the other distance measurement is tested, and so on, until all the distances that need to be tested are tested.

[0026] During the measurement process, when it is necessary to move the handheld laser rangefinder B11 back and forth, loosen the locking bolts B5 on both sides, slowly pull the handle B8 by hand, observe the scale value B10 until it reaches the required position, and then rotate the locking bolts B5 again to fix it until all parameters are measured.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An indoor calibration device for a handheld laser rangefinder, characterized in that, The device includes a working platform, on which a detection mechanism and an adjustment mechanism are installed. The detection mechanism includes a lifting platform set on the working platform. The lifting platform is controlled to rise and fall by a hydraulic cylinder set at the bottom of the working platform. Multiple detection discs are installed on the lifting platform and arranged in a stacked manner from top to bottom. Each detection disc is provided with a laser entrance port. The laser entrance port is eccentrically set. The inner wall of the detection disc is a laser-high reflectivity arc surface. A laser shield is provided on the laser-high reflectivity arc surface. The adjustment mechanism is used to adjust the state of the laser rangefinder under test. The laser line emitted by the laser rangefinder under test enters the detection disk through the laser entrance port. After being reflected multiple times in the laser high reflectivity arc surface, it finally illuminates the laser blocking object and is returned along the same path, entering the laser rangefinder again, thereby measuring the distance of the laser blocking object.

2. The indoor calibration device for a handheld laser rangefinder according to claim 1, characterized in that, The optical path length of the laser line within each detection disk is different.

3. The indoor calibration device for a handheld laser rangefinder according to claim 1, characterized in that, The adjustment mechanism includes a slide rail and an H-shaped frame. The space above the H-shaped frame is the working space, and the space below the H-shaped frame is the slide rail space. The slide rail is located within the slide rail space, and the H-shaped frame is slidably connected to the slide rail. A movable support plate is provided in the working space. One end of the movable support plate is hinged to the H-shaped frame, and a load-bearing plate is fixed below the other end of the movable support plate. An adjusting bolt is threaded onto the other end of the movable support plate, and the adjusting bolt passes through the movable support plate and rests against the load-bearing plate. Positioning bolts are provided on both sides of the H-shaped frame in the working space. The positioning bolts pass through both sides of the H-shaped frame and extend into the working space.

4. The indoor calibration device for a handheld laser rangefinder according to claim 3, characterized in that, The top of the slide rail has a scale value for marking the moving position of the H-shaped frame, and the middle connecting plate of the H-shaped frame has a strip-shaped cutout for observing the scale value.

5. The indoor calibration device for a handheld laser rangefinder according to claim 3 or 4, characterized in that, A set of parallel marking lines is provided on the other end of the movable support plate.

6. The indoor calibration device for a handheld laser rangefinder according to claim 3 or 4, characterized in that, Marking lines are placed inside the strip-shaped cutouts.

7. The indoor calibration device for a handheld laser rangefinder according to claim 3 or 4, characterized in that, A handle for pulling is provided on the end face of the H-shaped frame.

8. The indoor calibration device for a handheld laser rangefinder according to claim 3 or 4, characterized in that, A rubber positioning head is provided at the inner end of the positioning bolt.

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