Portable height-adjustable calibration device

Abstract

A portable height-adjustable calibration device relates to the technical field of pavement structure testing and comprises a support plate, a plurality of telescopic legs capable of telescopically adjusting height are arranged on the bottom side of the support plate, a plurality of fixing plates are arranged on the peripheral side of the top surface of the support plate, and limiting mounting grooves used for limiting mounting of a calibration plate are formed among the fixing plates. And the calibration plate is detachably accommodated and mounted in the limiting mounting groove. And each telescopic leg is of a foldable and telescopic structure. According to the utility model, the calibration plate is arranged on the support, and then the base is arranged on the adjusting assembly, so that the calibration piece is stably supported on the adjusting piece, and the reliability of a calibration result is improved; and then, by adjusting the adjusting assembly, the plane position of the first calibration surface on the calibration piece can be adjusted to the required position, so that the laser scanner can accurately and effectively measure the first calibration surface.

Description

Technical Field

[0001] The utility model relates to the technical field of road structure testing, in particular to a portable height-adjustable calibration device. Background Art

[0002] The skid resistance of pavement has always been a topic of concern and research. How to accurately measure the surface structure of asphalt mixture, especially the microstructure and macrostructure, and objectively and comprehensively evaluate its surface structure characteristics is an urgent problem to be solved by road workers. The pavement surface structure test methods specified in the current specifications of my country mainly include the sand spreading method and the pendulum friction coefficient tester method. Among them, the sand spreading method and the pendulum friction coefficient tester method are greatly affected by human factors during the operation process, resulting in a large dispersion of test results and low accuracy.

[0003] Current research has found that pavement texture is the most direct factor affecting anti-skid performance, and some research institutions currently mainly use laser scanning equipment to collect pavement structure morphology data at engineering sites. However, the scanning range of high-precision laser sensors is small, and rail traction is required to achieve round-trip scanning of the sensor, and finally splicing is performed to obtain regional road surface structure point cloud data of a larger range (above 300mm*300mm). In addition, the laser sensor calculates the elevation difference of the scanned object surface based on the triangular reflection principle of laser rays. The laser scanning accuracy is affected by factors such as the relative elevation of the object surface, the surface texture angle, and the environment. For this reason, the laser scanning system needs to be calibrated regularly to ensure that the scanning accuracy of the equipment is attenuated due to wear and aging of sensor components during long-term use, so as to maintain the equipment in time and correct the calibration data. For this reason, it is necessary to develop a portable and height-adjustable calibration device that can be applied to the calibration needs of different types of laser equipment. Utility Model Content

[0004] The purpose of the utility model is to provide a portable height-adjustable calibration device to solve the above technical problems.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A portable height-adjustable calibration device comprises a support plate, a plurality of telescopic legs for adjusting the height are arranged on the bottom side of the support plate, a plurality of fixed plates are arranged on the peripheral side of the top surface of the support plate, and a limit installation groove for limiting the installation of the calibration plate is formed between the plurality of fixed plates, and the calibration plate is detachably accommodated and installed in the limit installation groove.

[0007] Furthermore, each of the telescopic legs is a foldable and telescopic structure.

[0008] Furthermore, the telescopic leg comprises an upper telescopic leg and a lower telescopic leg, the upper telescopic leg and the lower telescopic leg are provided with telescopic fittings inside and outside, and the side of the upper telescopic leg is provided with an adjusting knob for fixing the telescopic length of the lower telescopic leg.

[0009] Furthermore, the upper telescopic leg is connected to the bottom side of the support plate via a storage hinge. After the upper telescopic leg and the lower telescopic leg are contracted, they are rotated ninety degrees along the storage hinge position to form a fold.

[0010] Furthermore, the lower end of each lower telescopic leg is arranged as a conical anti-skid bottom for easy fixation, and a foot pedal is fixedly mounted on the lower side of each lower telescopic leg by means of fixing screws.

[0011] Furthermore, a circular level is provided on the support plate for convenient observation of horizontality, and a handle is provided on the side of the support plate for easy carrying.

[0012] Furthermore, when viewed from a top view, the fixing plate is a “∟”-shaped structure.

[0013] Furthermore, the calibration plate is a toothed calibration plate, and standard gauge blocks of 30 degrees, 60 degrees, 90 degrees, 120 degrees and 150 degrees are arranged on the toothed calibration plate.

[0014] Furthermore, the number of the telescopic legs is set to three groups.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model sets the calibration plate on the support, and then sets the base on the adjustment component, so that the calibration piece is stably supported on the adjustment component, which is conducive to improving the reliability of the calibration result; then, by adjusting the adjustment component, the plane position of the first calibration surface on the calibration piece can be adjusted to the required position, so that the laser scanner can accurately and effectively measure the first calibration surface. The level is added to greatly improve the accuracy of the calibration result of the calibration device. A hinge is added to solve the problem that the calibration plate support is not easy to store. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2This is a schematic diagram of the storage state of the utility model;

[0020] Figure 3 This is a schematic diagram of height adjustment of the utility model;

[0021] Figure 4 This is a schematic diagram of the installation of the calibration plate of the utility model;

[0022] Figure 5 It is a schematic diagram of the tooth structure angle of the standard gauge block of the utility model.

[0023] In the figure: 1. fixing plate, 2. handle, 3. circular level, 4. storage hinge, 5. upper telescopic leg, 6. adjustment button, 7. lower telescopic leg, 8. foot pedal, 9. support plate, 10. conical non-slip bottom, 11. fixing screw. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] like Figure 1-5 As shown, a portable height-adjustable calibration device includes a support plate 9, a plurality of telescopic legs for adjusting the height are arranged on the bottom side of the support plate 9, a plurality of fixed plates 1 are arranged on the peripheral side of the top surface of the support plate, and a limit installation groove for limiting the installation of a calibration plate 12 is formed between the plurality of fixed plates 1, and the calibration plate 12 is detachably accommodated and installed in the limit installation groove.

[0029] Specifically, as shown in the figure, each of the telescopic legs is a foldable and telescopic structure. The number of the telescopic legs is set to three groups. The telescopic legs include an upper telescopic leg 5 and a lower telescopic leg 7. The upper telescopic leg 5 and the lower telescopic leg 7 are provided with telescopic fittings inside and outside. The side of the upper telescopic leg 5 is provided with an adjustment knob 6 for fixing the telescopic length of the lower telescopic leg 7. The upper telescopic leg 5 is connected to the bottom side of the support plate 9 through a storage hinge 4. After the upper telescopic leg 5 and the lower telescopic leg 7 are contracted, they are rotated ninety degrees along the position of the storage hinge 4 to form a fold. The lower end of each lower telescopic leg 7 is provided with a conical anti-slip bottom 10 for easy fixation, and a foot pedal 8 is fixedly installed on the lower side of each lower telescopic leg 7 by a fixing screw 11.

[0030] It is composed of three telescopic legs with storage, freely adjustable height and anti-skid functions, four fixing plates 1 for fixing calibration plates, a circular level 3 for ensuring the levelness of the entire device, and a semicircular ring handle for easy carrying. The retractability of the telescopic legs and the portable handle bring convenience to the transportation of the support. The inner wall of the fixing plate is installed with elastic anti-skid silicone that can be used for a long time to effectively prevent the calibration plate from colliding with the metal part of the support and causing damage. The circular level can ensure the horizontal placement of the device and effectively improve the leveling accuracy of the device.

[0031] Specifically, as shown in the figure, a circular level 3 is provided on the support plate 9 for convenient observation of horizontality, and a handle 2 is provided on the side of the support plate 9 for easy carrying. After the support is unfolded and placed on the road surface to be tested and the rough leveling is completed, the overall horizontal state of the device is judged according to the circular level 3, the foot pedal 8 is pressed down with the foot to fix the conical anti-skid bottom 10 on the road surface, and the telescopic leg adjustment knob 6 is slowly twisted to freely adjust the length of the telescopic leg according to the actual situation to achieve the function of the fine leveling device.

[0032] Specifically, as shown in the figure, when viewed from a top view, the fixing plate 1 is a “∟”-shaped structure.

[0033] Specifically, as shown in the figure, the calibration plate 12 is a toothed calibration plate, on which standard gauge blocks of 30 degrees, 60 degrees, 90 degrees, 120 degrees and 150 degrees are arranged, which can adapt to the scanning angles of different laser sensors and obtain the angle deviation data generated by different laser sensors scanning the contours of different objects, thereby helping the laser scanning equipment to correct and calibrate the point cloud data.

[0034] When the utility model is stored, the three telescopic leg adjusting knobs 6 are rotated counterclockwise to loosen the locking device, so that the lower telescopic leg can be translated toward the hollow part inside the upper telescopic leg, and then the telescopic leg adjusting knob is rotated clockwise to lock the locking device to complete the length adjustment of the telescopic leg, and then the telescopic leg storage hinge locking mechanism is released, at this time the telescopic leg can be freely rotated 90 degrees, the telescopic leg is rotated inwardly 90 degrees, and the locking device is locked to complete the storage action, thereby playing a storage role.

[0035] Specifically, the specific implementation process of the utility model is:

[0036] Unfold the calibration plate support: When in use, loosen the locking buckle of the storage hinge, rotate the retractable leg to unfold it, and then lock the locking buckle to fix the retractable leg.

[0037] Adjust the length of the retractable leg: When using, step on the foot pedal firmly, then slowly twist the telescopic leg adjustment knob to freely adjust the length of the telescopic leg, and then tighten the adjustment knob.

[0038] Install the calibration plate: Place the calibration plate lightly in the center of the four fixing plates, and install it downwards with a little force to complete the installation of the calibration plate.

[0039] Adjust the support height so that the surface of the calibration plate is at the optimal scanning height of the laser scanning device to be calibrated, start the laser scanning device, scan the calibration plate, obtain the scanned point cloud data, and carry out relevant data analysis and calibration correction work.

[0040] Storage of the calibration plate support: After use, rotate the adjustment knob counterclockwise to shorten the telescopic leg to the shortest length, tighten the adjustment knob, release the lock, rotate the telescopic leg inwards to retract it, and close the lock to complete storage.

[0041] The utility model sets the calibration plate on the support, and then sets the base on the adjustment component, so that the calibration piece is stably supported on the adjustment component, which is conducive to improving the reliability of the calibration result; then, by adjusting the adjustment component, the plane position of the first calibration surface on the calibration piece can be adjusted to the required position, so that the laser scanner can accurately and effectively measure the first calibration surface. The level is added to greatly improve the accuracy of the calibration result of the calibration device. A hinge is added to solve the problem that the calibration plate support is not easy to store.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0043] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A portable height-adjustable calibration device, characterized in that: It comprises a support plate (9), the bottom side of which is provided with a plurality of telescopic legs capable of adjusting the height, a plurality of fixing plates (1) are provided on the peripheral side of the top surface of the support plate, and a limit installation groove for limiting the installation of a calibration plate (12) is formed between the plurality of fixing plates (1), and the calibration plate (12) is detachably accommodated and installed in the limit installation groove.

2. A portable height-adjustable calibration device according to claim 1, characterized in that: Each of the telescopic legs is a foldable and telescopic structure.

3. A portable height-adjustable calibration device according to claim 2, characterized in that: The telescopic leg comprises an upper telescopic leg (5) and a lower telescopic leg (7). The upper telescopic leg (5) and the lower telescopic leg (7) are provided with telescopically matched inner and outer sleeves. The side of the upper telescopic leg (5) is provided with an adjusting knob (6) for fixing the telescopic length of the lower telescopic leg (7).

4. A portable height-adjustable calibration device according to claim 3, characterized in that: The upper telescopic leg (5) is connected to the bottom side of the support plate (9) via a storage hinge (4); after the upper telescopic leg (5) and the lower telescopic leg (7) are contracted, they are rotated ninety degrees along the position of the storage hinge (4) to form a folded shape.

5. A portable height-adjustable calibration device according to claim 4, characterized in that: The lower end of each lower telescopic leg (7) is provided with a conical anti-skid bottom (10) for easy fixation, and a foot pedal (8) is fixedly mounted on the lower side of each lower telescopic leg (7) via a fixing screw (11).

6. A portable height-adjustable calibration device according to claim 5, characterized in that: The support plate (9) is provided with a circular level (3) for conveniently observing horizontality, and the side of the support plate (9) is provided with a handle (2) for convenient carrying.

7. A portable height-adjustable calibration device according to claim 6, characterized in that: When viewed from a top view, the fixing plate (1) is a "∟"-shaped structure.

8. A portable height-adjustable calibration device according to claim 1, characterized in that: The calibration plate (12) is a toothed calibration plate, on which standard gauge blocks of 30 degrees, 60 degrees, 90 degrees, 120 degrees and 150 degrees are arranged.

9. A portable height-adjustable calibration device according to claim 4, characterized in that: The number of the telescopic legs is set to three groups.

Images