CN214252566U - Calibration device for emergent angle of laser range finder - Google Patents
Calibration device for emergent angle of laser range finder Download PDFInfo
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- CN214252566U CN214252566U CN202023261260.4U CN202023261260U CN214252566U CN 214252566 U CN214252566 U CN 214252566U CN 202023261260 U CN202023261260 U CN 202023261260U CN 214252566 U CN214252566 U CN 214252566U
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- 229920003023 plastic Polymers 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
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- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 4
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- 238000005259 measurement Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 3
- 238000009776 industrial production Methods 0.000 description 1
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Abstract
The utility model discloses a, calibration device of laser range finder exit angle, include: the device comprises a support table and a calibration component arranged on the upper surface of the support table; the calibration component comprises at least two transparent targets which are parallel to each other, and the mounting heights of the transparent targets are consistent and are vertical to the upper surface of the support platform; the transparent target is provided with a grid; one side of the supporting table is also provided with a mounting seat for fixing the distance measuring device, and the distance measuring device is internally provided with a laser distance meter; the line laser beam projected by the laser range finder can pass through each transparent target and form a light spot on the transparent target; the slope of the line on which the light spots on each transparent target are located can be used to obtain the exit angle of the laser rangefinder. The device can calculate the emergent angle of the laser beam, measure whether the error introduced in the assembling process influences the measuring precision, and has the characteristics of simple design and strong practicability.
Description
Technical Field
The invention relates to the field of system calibration, in particular to a calibration device for an emergent angle of a laser range finder.
Background
The laser range finder is an instrument for measuring the distance of a target by using a certain parameter of modulated laser; the pulse laser range finder emits one or a transient sequence of pulse laser beams to a target when working, receives the laser beams reflected by the target by a photoelectric element, measures the time from emission to reception of the laser beams by a timer, and calculates the distance from the laser range finder to the measured target; the device has light weight, small volume, simple operation, high speed and accuracy, and is widely applied to various links of industrial production and test.
In the use of laser range finder, need set up the mounted position and the laser beam outgoing angle of distancer according to the measurement requirement of testee, because there is precision error, the machining error of the structure of fixed laser appearance and the assembly error between them in laser appearance self, these error factors all can reduce laser range finder's measurement accuracy. In order to improve the measurement precision, it is necessary to accurately know whether the laser emitting angle of the laser range finder meets the preset angle requirement.
Disclosure of Invention
To the above problem, the utility model provides a calibration device of laser range finder exit angle, this device can calculate the exit angle of laser beam, and then differentiate whether meet the requirements with the difference of predetermineeing between the angle of exit angle, whether the error of measureing the introduction in the assembling process causes the influence to measurement accuracy, have the design simply, characteristics that the practicality is strong.
The utility model discloses technical scheme as follows:
a calibration device for the emitting angle of a laser range finder comprises: the calibration device comprises a support table and a calibration component arranged on the upper surface of the support table;
the support table is fixed on the ground, and the upper surface of the support table is kept horizontal;
the calibration component comprises at least two transparent targets which are parallel to each other, and the mounting heights of the transparent targets are consistent and are vertical to the upper surface of the support platform;
the transparent target is provided with a grid;
one side of the supporting table is also provided with a mounting seat, the mounting seat is used for fixing a distance measuring device, and one or more laser distance measuring instruments to be calibrated are arranged in the distance measuring device; the line laser beam projected by the laser range finder can pass through each transparent target and form a light spot on the transparent target; the slope of the line on which the light spots on each transparent target are located can be used to obtain the exit angle of the laser rangefinder.
In order to guarantee the acquisition precision of the position coordinates, the transparent target is preferably a plastic target, the thickness of the transparent target is less than 0.2mm, and the size of the grid is less than or equal to 1 mm.
In order to ensure the stable installation of the target, preferably, a plurality of parallel supporting plates are arranged on the supporting table and are used for respectively supporting the transparent targets; the middle area of the supporting plate is hollowed to form a light-transmitting groove; the transparent target is fixed in the light-transmitting groove.
Preferably, the support plate is an aluminum alloy support plate.
Preferably, the support platform is a standard optical platform.
In order to ensure the processing precision, preferably, the maximum size of the upper surface of the supporting platform is less than 5m, the height of the transparent targets is set to be 0.3 m-1 m, and the distance between two adjacent transparent targets is set to be 0.1 m-0.7 m.
The emitting angle of the laser range finder refers to an included angle between a laser beam (a projected line laser beam) and the upper surface of the support table.
This scheme utilization calibration device reads the position coordinate of emergent laser through a plurality of transparent targets that are parallel to each other, calculates the outgoing angle of laser beam according to the position coordinate, and then judges whether difference between outgoing angle and the predetermined angle meets the requirements, whether the error of leading in the measurement assembling process causes the influence to measurement accuracy, and this device design is simple, and the practicality is strong, and the outgoing angle that not only is applicable to single laser range finder marks, also can mark a plurality of laser range finder's laser outgoing angle simultaneously.
Drawings
FIG. 1 is a schematic perspective view of a support plate according to an embodiment;
FIG. 2 is a schematic perspective view of a calibration component according to an embodiment;
fig. 3 is a front view of the whole structure in embodiment 2.
Detailed Description
Example 1
A calibration device for the emitting angle of a laser range finder comprises: the device comprises a support table 1 and a calibration component 2 arranged on the upper surface of the support table 1;
the support table 1 is fixed on the ground, and the upper surface of the support table is kept horizontal;
the calibration component 2 comprises at least two transparent targets 22 which are parallel to each other, and the installation height of each transparent target 22 is consistent and is vertical to the upper surface of the support table 1; wherein, the transparent target is provided with a grid which is a small square with the side length less than or equal to 1 mm;
a mounting seat 3 is further arranged on one side of the supporting table 1 and used for fixing a distance measuring device, and a laser distance measuring instrument 31 to be calibrated is mounted in the distance measuring device; the line laser beam projected by the laser range finder can pass through each transparent target and form a light spot on the transparent target; the slope of the line on which the light spots on each transparent target are located can be used to obtain the exit angle of the laser rangefinder.
For the precision of acquireing of guarantee position coordinate, as the utility model discloses a preferred embodiment, transparent target is the plastics target, and its thickness is less than 0.2 mm.
In order to ensure the installation stability of the target, in the embodiment, as shown in fig. 1, a plurality of support plates 21 parallel to each other are provided on the support table 1, and are used for supporting the transparent targets respectively; the middle area of the support plate 21 is hollowed to form a light transmission groove 23; as shown in fig. 2, the transparent target 22 is fixed in the light-transmitting groove.
Specifically, the support plate 21 is an aluminum alloy support plate; the support table 1 is a standard optical platform.
In order to ensure the processing precision, when in use, the maximum size of the upper surface of the supporting table 1 is less than 5m, the height of the transparent target 22 is set to be 0.3 m-1 m, and the distance between two adjacent transparent targets is set to be 0.1 m-0.7 m.
In order to facilitate subsequent adjustment, an adjustable clamping part is further arranged in the distance measuring device, and the clamping part is arranged on the universal ball; when the difference between the calibrated laser angle and the set angle is greater than the threshold value, the clamping part can adjust the position and/or the angle of the laser range finder and clamp the laser range finder after adjustment.
In this embodiment, the transparent targets are plastic targets made of PET material, the thickness of the transparent targets is 0.1mm, two transparent targets are provided, the size of the upper surface of the support table 1 is 4m, the height of the transparent target 22 is set to 0.5m, and the distance between two adjacent transparent targets is set to 0.3 m; the distance measuring device is internally provided with a laser distance meter 31 to be calibrated, and the projected linear laser beam can penetrate through each transparent target and form a light spot on the transparent target;
reading the position coordinates of the light spot in the transparent target through the grid on the transparent target;
and respectively reading the position coordinates of the light spots in each transparent target, fitting the slope of a straight line of the line laser beam by using the position coordinates, and obtaining the angle of the laser emitted by the laser range finder according to the slope.
Example 2
A calibration device for the exit angle of a laser distance measuring instrument, as shown in fig. 3, comprises: the device comprises a support table 1 and a calibration component 2 arranged on the upper surface of the support table 1;
the support table 1 is fixed on the ground, and the upper surface of the support table is kept horizontal;
the calibration component 2 comprises at least two transparent targets 22 which are parallel to each other, and the installation height of each transparent target 22 is consistent and is vertical to the upper surface of the support table 1; wherein, the transparent target is provided with a grid which is a small square with the side length less than or equal to 1 mm; in this embodiment, two transparent targets are provided;
one side of the supporting table 1 is also provided with a mounting seat 3, the mounting seat is used for fixing a distance measuring device, and two laser distance measuring instruments 31 to be calibrated are arranged in the distance measuring device; the line laser beam projected by each laser range finder can penetrate through each transparent target and form a light spot on the transparent target; the slope of the line on which the light spots on each transparent target are located can be used to obtain the exit angle of the laser rangefinder.
For the precision of acquireing of guarantee position coordinate, as the utility model discloses a preferred embodiment, transparent target is the plastics target, and its thickness sets up to 0.15 mm.
In order to ensure the installation stability of the target, in the embodiment, as shown in fig. 1, a plurality of support plates 21 parallel to each other are provided on the support table 1, and are used for supporting the transparent targets respectively; the middle area of the support plate 21 is hollowed to form a light transmission groove 23; as shown in fig. 2, the transparent target 22 is fixed in the light-transmitting groove.
Specifically, the support plate 21 is an aluminum alloy support plate; the support table 1 is a standard optical platform.
In order to ensure the processing accuracy, in the present embodiment, the size of the upper surface of the supporting table 1 is set to 3m, the height of the transparent target 22 is set to 0.4m, and the distance between two adjacent transparent targets is set to 0.2 m.
The projected line laser beams of the two laser range finders 31 to be calibrated can penetrate through each transparent target and form light spots on the transparent targets;
reading the position coordinates of the light spots in the transparent target through a grid on the transparent target (as shown in FIG. 3, the light spot position coordinates of the first laser are (x1, y1), (x2, y 2); and the light spot position coordinates of the second laser are (x3, y3), (x4, y 4));
and respectively reading the position coordinates of the light spot in each transparent target, fitting the linear slopes of the two linear laser beams by utilizing the position coordinates, and obtaining the laser emitting angles of the two laser range finders according to the slopes.
The convergence point of the two laser beams in the opposite direction of the emergent direction and the included angle between the two laser beams can be obtained according to the slope of the straight line of the two laser beams; and comparing the angle with a preset convergent point and a preset included angle in design, analyzing and judging whether the difference between the actual angle and the preset angle meets the requirement or not, and measuring whether errors introduced in the assembling process affect the measurement precision or not.
Claims (6)
1. A calibration device for the emitting angle of a laser range finder comprises: the device comprises a supporting table (1) and a calibration component (2) arranged on the upper surface of the supporting table (1);
the device is characterized in that the support table (1) is fixed on the ground, and the upper surface of the support table is kept horizontal;
the calibration component (2) comprises at least two transparent targets (22) which are parallel to each other, and the mounting heights of the transparent targets (22) are consistent and are vertical to the upper surface of the support table (1);
the transparent target is provided with a grid;
one side of the supporting table (1) is also provided with a mounting seat (3) which is used for fixing a distance measuring device, and one or more laser distance measuring instruments (31) to be calibrated are arranged in the distance measuring device; the line laser beam projected by the laser range finder can pass through each transparent target and form a light spot on the transparent target; the slope of the line on which the light spots on each transparent target are located can be used to obtain the exit angle of the laser rangefinder.
2. The calibration device for the exit angle of the laser range finder as described in claim 1, wherein: the transparent target is a plastic target, the thickness of the transparent target is less than 0.2mm, and the size of the grid is less than or equal to 1 mm.
3. The calibration apparatus for the exit angle of the laser range finder as described in claim 1 or 2, wherein: a plurality of parallel supporting plates (21) are arranged on the supporting platform (1) and are used for respectively supporting the transparent targets; the middle area of the support plate (21) is hollowed, and a light transmission groove (23) is formed; the transparent target (22) is fixed in the light-transmitting groove.
4. The calibration device for the exit angle of the laser range finder as described in claim 3, wherein: the support plate (21) is an aluminum alloy support plate.
5. The calibration device for the exit angle of the laser range finder as described in claim 1, wherein: the supporting platform (1) is a standard optical platform.
6. The calibration device for the exit angle of the laser range finder as described in claim 5, wherein: the maximum size of the upper surface of the support table (1) is less than 5m, the height of the transparent targets (22) is set to be 0.3 m-1 m, and the distance between every two adjacent transparent targets is set to be 0.1 m-0.7 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023261260.4U CN214252566U (en) | 2020-12-30 | 2020-12-30 | Calibration device for emergent angle of laser range finder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023261260.4U CN214252566U (en) | 2020-12-30 | 2020-12-30 | Calibration device for emergent angle of laser range finder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214252566U true CN214252566U (en) | 2021-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023261260.4U Active CN214252566U (en) | 2020-12-30 | 2020-12-30 | Calibration device for emergent angle of laser range finder |
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| Country | Link |
|---|---|
| CN (1) | CN214252566U (en) |
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- 2020-12-30 CN CN202023261260.4U patent/CN214252566U/en active Active
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Address after: Room 495, building 3, 1197 Bin'an Road, Binjiang District, Hangzhou City, Zhejiang Province 310051 Patentee after: Yi Si Si (Hangzhou) Technology Co.,Ltd. Address before: Room 495, building 3, 1197 Bin'an Road, Binjiang District, Hangzhou City, Zhejiang Province 310051 Patentee before: ISVISION (HANGZHOU) TECHNOLOGY Co.,Ltd. |