CN214583311U - Consistency calibrating device for various measuring reference surfaces of handheld laser range finder - Google Patents
Consistency calibrating device for various measuring reference surfaces of handheld laser range finder Download PDFInfo
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- CN214583311U CN214583311U CN202120687215.0U CN202120687215U CN214583311U CN 214583311 U CN214583311 U CN 214583311U CN 202120687215 U CN202120687215 U CN 202120687215U CN 214583311 U CN214583311 U CN 214583311U
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Abstract
The utility model discloses a hand-held type laser range finder measures datum plane uniformity calibrating installation respectively, including the guide rail and along the vertical datum plane adjustment unit that sets gradually of guide rail, can be on the guide rail longitudinal sliding's accurate platform of second grade air supporting, interference mirror and laser interferometer. The reference surface adjusting unit is provided with a horizontally rotatable adjusting platform, a zero centering hole and a reference block, can directly verify three reference surfaces of the handheld laser range finder and verify the measurement consistency of the three reference surfaces, and solves the problem that the conventional handheld laser range finder verifying device can only verify one reference surface or perform data processing by measuring the distance between the reference surfaces so as to obtain the verification result of the measurement consistency of each reference surface by an indirect measurement method.
Description
Technical Field
The utility model relates to a geometric measurement appearance measurement calibrating installation technical field especially relates to a hand-held type laser range finder measures reference surface uniformity calibrating installation.
Background
The hand-held laser range finder is an instrument for measuring distance by using laser, and the hand-held laser range finder needs to be periodically verified to ensure the accuracy of the measurement. When the handheld laser range finder is used for detection, the handheld laser range finder comprises measurement consistency verification items of all reference surfaces, namely, the handheld laser range finder to be detected and a standard reflecting plate are respectively arranged at a distance with a standard value of 10m, the reference surfaces of the range finder are respectively used as measurement references to measure a 10m standard interval, each reference surface is used for measuring distance for 5 times, the average value of 5 times is taken as a measurement value, and the maximum difference value between the measurement values of all the measurement reference surfaces is used as a verification result.
The old hand-held laser distance measuring instrument only has one reference surface (namely a rear reference surface), and the hand-held laser distance measuring instrument can only measure distance by taking the rear reference surface as a reference when in actual use, so the application condition of the laser distance measuring instrument is limited. When the hand-held laser range finder is checked, only the back reference surface of the hand-held laser range finder can be checked, the hand-held laser range finder needs to be fixed on a checking device during actual checking, the back reference surface of the hand-held laser range finder is abutted against the zero reference surface of the checking device, and then the hand-held laser range finder is checked. With the development of technology, the existing handheld laser range finders generally have two or even more reference surfaces. The existing calibrating device can only calibrate one reference surface and cannot complete the calibration work of a plurality of reference surfaces, so the measurement consistency items of all the reference surfaces cannot be calibrated (the calibrated data is processed by an indirect measurement method according to the distance between all the reference surfaces of the handheld laser range finder and the calibrated data of the reference surfaces to obtain the measurement consistency result of all the reference surfaces, but the method has large error and inaccurate data result).
When the consistency of each measuring reference surface of the traditional handheld laser range finder is verified, a standard steel tape is used as a main standard device, the method needs to install and move the standard reflecting plate for multiple times, the operation is complicated, and the accuracy of value tracing is not high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a hand-held type laser range finder each measures reference surface uniformity calibrating installation is provided to the realization carries out the uniformity examination of high accuracy to hand-held type laser range finder each reference surface.
In order to solve the above problems, the utility model adopts the following technical scheme:
the utility model provides an each measurement reference surface uniformity calibrating installation of hand-held type laser range finder, includes the guide rail and along the vertical reference surface adjustment unit that sets gradually of guide rail, can be on the guide rail longitudinal sliding second grade air supporting precision platform, interference mirror and laser interferometer, reference surface adjustment unit can dismantle with the guide rail and be connected, interference mirror and laser interferometer all with guide rail fixed connection, one side that second grade air supporting precision platform is close to reference surface adjustment unit is equipped with the standard reflecting plate, one side that second grade air supporting precision platform is close to the interference mirror is fixed and is provided with the speculum, and the hand-held type laser range finder who treats the examination is fixed on reference surface adjustment unit, hand-held type laser range finder, standard reflecting plate, speculum, interference mirror and laser interferometer are located same straight line.
Furthermore, but reference level adjustment unit includes horizontal rotation's adjustment platform, vertical setting at the zero-position centering hole of adjustment platform middle part and be used for leaning on flat reference block with the preceding reference surface of hand-held type laser range finder or the back reference surface of hand-held type laser range finder, the reference block is sliding fit and the side of slip direction perpendicular to hand-held type laser range finder with the adjustment platform, reference block and hand-held type laser range finder matched with one side are the measuring basis vertical plane, the axis that the measuring basis vertical plane place plane passes through the zero-position centering hole.
Further, all be equipped with on the adjustment platform in hand-held type laser range finder's both sides with laser range finder side vertically adjusting lever second, adjusting lever second all is fixed being provided with in the one end of being close to laser range finder and is used for the tight clamping piece of hand-held type laser range finder clamp, adjusting lever second all with adjustment platform threaded connection.
Further, fixedly connected with spirit level below the adjustment platform, the horizontal rotation part and the adjustment platform bottom fixed connection of spirit level, the fixed part and the guide rail of spirit level can be dismantled and be connected, the horizontal rotation center and the zero position centering hole of spirit level are concentric.
Further, the reference block sets up two in hand-held type laser range finder both sides for the symmetry, the reference block all rotates in one side of keeping away from hand-held type laser range finder and is connected with the reference block that is used for driving to correspond along the gliding adjusting lever first of adjustment platform, adjusting lever first is threaded connection with the adjustment platform, the equal perpendicular to laser range finder side of slip direction of reference block.
Furthermore, one end of the adjusting rod B far away from the clamping piece is fixedly connected with a knob B.
Furthermore, one end of the adjusting rod A, which is far away from the reference block, is fixedly connected with a knob A.
Furthermore, temperature sensors fixedly connected with the guide rail are arranged on the light path of the handheld laser range finder and the light path of the laser interferometer.
The utility model discloses an actively the effect does:
1. the utility model discloses be equipped with reference surface adjustment unit, reference surface adjustment unit is equipped with horizontal rotation's adjustment platform, zero-bit centering hole and reference block, can directly examine and determine hand-held type laser range finder's three reference surface, and can examine and determine the measurement uniformity of three reference surface, solve current hand-held type laser range finder calibrating installation and can only examine and determine or carry out data processing through measuring the distance between each reference surface to a reference surface, obtain the problem of the examination result of each reference surface measurement uniformity with indirect measurement's method.
2. The leveling platform is provided with a level gauge below, the leveling platform can be adjusted horizontally, the horizontal rotation angle of the leveling platform is accurately controlled, and adjustment is convenient.
3. The utility model discloses be equipped with laser interferometer, because laser interferometer uses laser wavelength as known length, carry out the measurement and the demarcation of length, more traditional standard steel tape measure precision very improves, has also improved the degree of accuracy of tracing to the source simultaneously, has reduced the degree of difficulty of operation.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural diagram of a reference plane adjusting unit;
FIG. 3 is a top view of the hand-held laser rangefinder coupled to the datum adjustment unit for rear datum measurement;
FIG. 4 is a top view of the hand-held laser rangefinder coupled to the datum adjustment unit during a front datum measurement;
FIG. 5 is a top view of the hand-held laser rangefinder coupled to the datum level adjustment unit for mid-datum level measurement;
FIG. 6 is a schematic diagram of the back of a hand-held laser rangefinder under test;
FIG. 7 is a schematic diagram of a laser interferometer zero clearing;
in the figure, 1, a base; 2. a level; 3. adjusting the platform; 4. a reference block; 5. a knob A; 6. adjusting the rod A; 7. a knob B; 8. an adjusting rod B; 9. a clip; 10. a chute; 11. zero centering a hole; 12. a hand-held laser rangefinder; 13. a back datum plane; 14. a standard reflective plate; 15. a reference screw hole; 16. a front datum plane; 17. a guide rail; 18. measuring a reference vertical plane; 19. a mirror; 20. an interference mirror; 21. a temperature sensor; 22. a laser interferometer; 23. a secondary air-floating precise platform; 24. finely adjusting a knob; 25. and (5) aligning to a zero reference plate.
Detailed Description
As shown in FIG. 1, the device for calibrating the consistency of each measuring reference surface of the handheld laser range finder comprises a guide rail 17, reference surface adjusting units, a secondary air-floatation precision platform 23, an interference mirror 20 and a laser interferometer 22, wherein the reference surface adjusting units are sequentially arranged from left to right along the longitudinal direction of the guide rail 17, the secondary air-floatation precision platform 23 can longitudinally slide on the guide rail 17, the reference surface adjusting units are detachably connected with the guide rail 17, the interference mirror 20 and the laser interferometer 22 are fixedly connected with the guide rail 17, a standard reflecting plate 14 is arranged on the left side of the secondary air-floatation precision platform 23, and a fine-adjustment knob capable of adjusting the distance between the standard reflecting plate 14 and the reflecting mirror 19 is arranged at the bottom of the standard reflecting plate 14. The right side of the secondary air-floatation precision platform 23 is fixedly connected with a reflecting mirror 19 facing a laser interferometer through a screw, the handheld laser range finder 12 is fixed on the reference surface adjusting unit, and the handheld laser range finder 12, the standard reflecting plate 14, the reflecting mirror 19, the interference mirror 20 and the laser interferometer 22 are positioned on the same straight line. The guide rail 17 is a high-precision granite guide rail.
And temperature sensors 21 fixedly connected with the rear side of the guide rail 17 are longitudinally and uniformly distributed above the guide rail 17 at intervals of one meter.
Because the laser interferometer 22 takes the laser wavelength as the known length to measure and calibrate the length, compared with the traditional standard steel tape measure, the precision is greatly improved, the tracing accuracy is also improved, and the operation difficulty is reduced.
As shown in FIG. 7, the hand-held laser rangefinder 12 requires zero calibration with the laser interferometer 22 prior to calibration. Because the utility model discloses be in the constant temperature laboratory, consequently laser interferometer 22's numerical value receives the influence of air temperature inhomogeneous factor great, and the temperature sensor 21 of distribution in guide rail 17 top is used for revising laser interferometer 22's numerical value in real time. During the verification, the detected handheld laser range finder 12 and the laser interferometer are respectively arranged at two sides of the guide rail. Then, based on the abbe principle, the spatial position and posture of the laser interferometer 22, the interference mirror 20, the reflection mirror 19 and the standard reflection plate 14 are adjusted by taking the zero point close to the left end on the guide rail 17 as a reference, so that the laser emitted by the detected handheld laser range finder 12 and the laser emitted by the laser interferometer 22 are positioned on the same optical path.
The reference surface adjustment unit is then removed and a zero reference plate 25 is inserted at the zero point of the guide rail 17, the right side of the zero reference plate 25 being coplanar with the zero point. And then moving the secondary air-floatation precise platform 23 to the zero-position reference plate 25 longitudinally, enabling the standard reflecting plate surface 14 to be tightly attached to the zero-position reference plate 25 through the fine adjustment knob 24, and simultaneously resetting the indication value of the laser interferometer 22. And moving the secondary air-floatation precision platform to a position of 10m, taking down the zero reference plate 25, installing the handheld laser range finder 12 on the reference surface adjusting unit, and connecting the reference surface adjusting unit with the guide rail 17 again.
The calibration process of each datum plane of the handheld laser range finder 12 is as follows:
as shown in fig. 6, the handheld laser range finder 12 to be measured has three reference surfaces, namely a front reference surface 16, a rear reference surface 13 and a middle reference surface where the center line of the reference screw hole 15 on the back surface of the handheld laser range finder is located, and the front reference surface 16, the rear reference surface 13 and the middle reference surface are parallel to each other. The front reference surface 16 and the rear reference surface 13 are used as a starting measurement reference and a plane to be measured for distance measurement to be flat during actual measurement. The reference screw hole 15 is used for fixedly connecting the handheld laser range finder to a tripod or other supporting devices during actual measurement, and the middle reference surface where the center of the reference screw hole 15 is located is used as an initial measurement reference for distance measurement.
As shown in fig. 2, the reference surface adjusting unit includes a rectangular adjusting platform 3 capable of rotating horizontally, a zero centering hole 11 vertically arranged in the middle of the adjusting platform 3 near the front, and two rectangular reference blocks 4 transversely symmetrically arranged on two sides of the zero centering hole 11, the reference blocks 4 are both perpendicular to the top surface of the adjusting platform 3, the reference blocks 4 are both in sliding fit with the adjusting platform 3, a measuring reference vertical surface 18 is arranged behind the reference blocks 4, and the plane where the measuring reference vertical surface 18 is located passes through the axis of the zero centering hole 11.
The left and right sides of adjustment platform 3 are vertical curb plate, adjustment platform 3 rear portion bilateral symmetry is equipped with two horizontal adjusting lever second 8, adjusting lever second 8 is through threaded connection with the curb plate that corresponds. The inner end of the adjusting rod B8 is fixedly connected with a round clamping piece 9 used for clamping the handheld laser range finder 12, and the outer end of the adjusting rod B8 is fixedly connected with a knob B7 through a screw.
The two reference blocks 4 are symmetrically arranged on the left side and the right side of the zero centering hole, the adjusting platform 3 is provided with sliding grooves 10 at positions corresponding to the bottoms of the reference blocks 4, and the bottoms of the reference blocks 4 are inserted into the corresponding sliding grooves 10 and are in sliding fit with the adjusting platform 3. The outside of benchmark piece 4 all rotates and is connected with horizontal adjusting lever first 6, adjusting lever first 6 is through threaded connection with the curb plate that corresponds, adjusting lever first 6 is keeping away from the equal fixedly connected with knob first 5 of one end of benchmark piece 4.
A level 2 fixedly connected with the adjusting platform 3 is arranged below the adjusting platform, and the level 2 adopts the level 2 used by a total station for horizontal adjustment and angle adjustment. Screw fixed connection is passed through with the adjustment platform 3 bottom to the horizontal rotation portion of spirit level 2, the horizontal rotation center of spirit level 2, zero-bit are concentric to the zero-bit point of hole 11 and guide rail 17, 2 bottoms of spirit level are base 1, base 1 passes through stud with guide rail 17 and can dismantle the connection.
As shown in fig. 3, the laser light emitted by the hand-held laser rangefinder 12 is directed to the right. When the rear reference surface 13 of the hand-held laser distance measuring instrument 12 is checked, the two knobs 5 are rotated to move the two reference blocks 4 inward, and then the rear reference surface 13 is abutted against the measurement reference vertical surface 18 on the right side of the reference block 4. The knob B7 is then rotated to clamp the hand-held laser rangefinder 12. The plane of the rear reference surface 13 now passes through the zero-position-aligned hole 11 and also passes through the zero-position point of the guide rail 17. The angle adjustment knob of the level 2 is then adjusted so that the laser light emitted by the hand-held laser rangefinder 12 is directed parallel to the guide rail 17 and towards the standard reflector plate 14. The hand-held laser rangefinder 12 is set to a back datum measurement mode and then certified.
When the front reference surface 13 of the handheld laser range finder 12 is detected, as shown in fig. 4, the adjusting platform 3 in fig. 3 is horizontally rotated 180 degrees around the zero-position centering hole 11, the front reference surface 16 of the handheld laser range finder 12 is leaned against the measuring reference vertical surface 18 on the left side of the reference block 4, and the laser emitted by the handheld laser range finder 12 is directed to the right. The knob B7 is then rotated to clamp the hand-held laser rangefinder 12. The plane of the front reference plane 16 now passes through the zero-position-aligned hole 11 and also passes through the zero-position point of the guide rail 17. The angle adjustment knob of the level 2 is then adjusted so that the laser light emitted by the hand-held laser rangefinder 12 is directed parallel to the guide rail 17 and towards the standard reflector plate 14. The hand-held laser rangefinder 12 is set to a front datum measurement mode and then certified.
As shown in fig. 5, when the intermediate reference surface of the hand-held laser range finder 12 is detected, the direction of the adjustment table 3 coincides with the direction of the adjustment table 3 in fig. 3. The two knobs (5) are rotated to move the two reference blocks (4) outwards. Then, a connecting piece is screwed into a reference screw hole 15 of the handheld laser range finder 12, the connecting piece is a pin shaft with threads at one end, one end of the pin shaft with threads is screwed into the reference screw hole 15, the other end of the pin shaft is inserted into a zero centering hole 11 on the adjusting platform 3, and the pin shaft is rotatably connected with the adjusting platform 3. At this time, the plane of the middle reference plane of the handheld laser range finder 12 passes through the center of the zero-position centering hole 11 and also passes through the zero-position point of the guide rail 17, and the laser emitted by the handheld laser range finder 12 is directed to the right. The knob B7 is then rotated to clamp the hand-held laser rangefinder 12. The angle adjustment knob of the level 2 is then adjusted so that the laser light emitted by the hand-held laser rangefinder 12 is directed parallel to the guide rail 17 and towards the standard reflector plate 14. The hand-held laser rangefinder 12 is set to an intermediate datum level measurement mode and then certified.
And summarizing and calculating the data calibrated on the front datum plane 16, the rear datum plane 13 and the middle datum plane of the handheld laser range finder 12, thereby completing the measurement consistency calibration items of all the datum planes.
The above-mentioned embodiments are described in detail and specifically, so as to explain the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the same, but not to limit the present invention, and the scope of the present invention should not be limited by the embodiment, i.e. all equivalent changes or modifications made by the spirit of the present invention, for researchers or technicians in the field, within the structure of the present invention, the local modifications inside the system and the changes, transformations, etc. between the subsystems are still within the scope of the present invention.
Claims (8)
1. The device for calibrating the consistency of each measuring reference surface of the handheld laser range finder is characterized by comprising a guide rail (17), a reference surface adjusting unit, a secondary air-floatation precise platform (23), an interference mirror (20) and a laser interferometer (22), wherein the reference surface adjusting unit, the secondary air-floatation precise platform (23), the interference mirror (20) and the laser interferometer (22) are longitudinally and sequentially arranged along the guide rail (17), the secondary air-floatation precise platform can longitudinally slide on the guide rail (17), the reference surface adjusting unit is detachably connected with the guide rail (17), the interference mirror (20) and the laser interferometer (22) are fixedly connected with the guide rail (17), a standard reflecting plate (14) is arranged on one side, close to the reference surface adjusting unit, of the secondary air-floatation precise platform (23), a reflecting mirror (19) is fixedly arranged on one side, close to the interference mirror (20), the handheld laser range finder (12) to be calibrated is fixed on the reference surface adjusting unit, and the handheld laser range finder (12), The standard reflecting plate (14), the reflecting mirror (19), the interference mirror (20) and the laser interferometer (22) are positioned on the same straight line.
2. The device for calibrating the consistency of each measurement reference surface of the handheld laser range finder as claimed in claim 1, wherein the reference surface adjusting unit comprises an adjusting platform (3) capable of rotating horizontally, a zero centering hole (11) vertically arranged in the middle of the adjusting platform (3), and a reference block (4) used for being flush with a front reference surface (16) of the handheld laser range finder (12) or a rear reference surface (13) of the handheld laser range finder (12), the reference block (4) and the adjusting platform (3) are in sliding fit, the sliding direction of the reference block is perpendicular to the side surface of the handheld laser range finder (12), the surface of the reference block (4) matched with the handheld laser range finder (12) is a measurement reference vertical surface (18), and the plane of the measurement reference vertical surface (18) passes through the axis of the zero centering hole (11).
3. The device for calibrating the consistency of each measuring reference surface of the handheld laser range finder according to claim 2, wherein adjusting rods B (8) perpendicular to the side surfaces of the handheld laser range finder are arranged on the adjusting platform (3) on two sides of the handheld laser range finder (12), clamping pieces (9) used for clamping the handheld laser range finder (12) are fixedly arranged at one ends of the adjusting rods B (8) close to the laser range finder, and the adjusting rods B (8) are in threaded connection with the adjusting platform (3).
4. The consistency calibrating device for each measuring datum plane of the handheld laser range finder as claimed in claim 2, wherein a level (2) is fixedly connected below the adjusting platform (3), a horizontally rotating part of the level (2) is fixedly connected with the bottom of the adjusting platform (3), a fixed part of the level (2) is detachably connected with a guide rail (17), and a horizontally rotating center of the level (2) is concentric with the zero centering hole (11).
5. The device for calibrating the consistency of each measuring reference surface of the handheld laser range finder as claimed in claim 2, wherein the reference blocks (4) are two symmetrically arranged on two sides of the handheld laser range finder (12), the reference blocks (4) are respectively and rotatably connected with an adjusting rod A (6) used for driving the corresponding reference blocks (4) to slide along the adjusting platform (3) on one side far away from the handheld laser range finder (12), the adjusting rod A (6) and the adjusting platform (3) are in threaded connection, and the sliding direction of the reference blocks (4) is perpendicular to the side surface of the laser range finder.
6. The device for calibrating the consistency of each measuring reference surface of the handheld laser range finder as claimed in claim 3, wherein the adjusting rod B (8) is fixedly connected with a knob B (7) at one end far away from the clamping piece (9).
7. The device for calibrating the consistency of each measuring reference surface of the handheld laser range finder as claimed in claim 5, wherein the adjusting rod A (6) is fixedly connected with a knob A (5) at one end far away from the reference block (4).
8. The device for calibrating the consistency of each measurement reference surface of the hand-held laser range finder as claimed in claim 1, wherein the temperature sensors (21) fixedly connected with the guide rail (17) are arranged on the optical path of the hand-held laser range finder (12) and the optical path of the laser interferometer (22).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120687215.0U CN214583311U (en) | 2021-04-06 | 2021-04-06 | Consistency calibrating device for various measuring reference surfaces of handheld laser range finder |
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| CN202120687215.0U CN214583311U (en) | 2021-04-06 | 2021-04-06 | Consistency calibrating device for various measuring reference surfaces of handheld laser range finder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115327519A (en) * | 2022-10-14 | 2022-11-11 | 广东省计量科学研究院（华南国家计量测试中心） | Ranging error detection system and method of handheld laser range finder |
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2021
- 2021-04-06 CN CN202120687215.0U patent/CN214583311U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115327519A (en) * | 2022-10-14 | 2022-11-11 | 广东省计量科学研究院（华南国家计量测试中心） | Ranging error detection system and method of handheld laser range finder |
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