CN215894940U - Laser radar echo signal intensity calibration system - Google Patents
Laser radar echo signal intensity calibration system Download PDFInfo
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- CN215894940U CN215894940U CN202122213671.4U CN202122213671U CN215894940U CN 215894940 U CN215894940 U CN 215894940U CN 202122213671 U CN202122213671 U CN 202122213671U CN 215894940 U CN215894940 U CN 215894940U
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Abstract
The utility model relates to the technical field of laser radars, in particular to a system for calibrating the intensity of a laser radar echo signal. Including laser radar, decay piece and calibration board, the decay piece is the disk, and its middle part is equipped with the through-hole, laser radar is used for launching detection laser and receives echo signal, and the detection laser of laser radar transmission passes the through-hole irradiation on the decay piece and arrives the calibration board on to produce echo signal through the calibration board reflection, echo signal can pass and is received by laser radar on the decay piece back incidenting laser radar, decay piece and calibration board all can be changed. The utility model can easily adjust the intensity of the echo signal, realizes the calibration of the intensity of the echo signal, does not need to repeatedly move and adjust the position of the calibration plate, saves a large amount of manpower and time, is not limited by site conditions, and improves the calibration efficiency.
Description
Technical Field
The utility model relates to the technical field of laser radars, in particular to a system for calibrating the intensity of a laser radar echo signal.
Background
Laser Radar (Laser Radar) is a Radar system that detects characteristic quantities such as a position and a velocity of a target by emitting a Laser beam. The working principle is that a detection signal (laser beam) is transmitted to a target, then a received signal (target echo) reflected from the target is compared with the transmitted signal, and after appropriate processing, relevant information of the target, such as target distance, direction, height, speed, attitude, even shape and other parameters, can be obtained, so that the target is detected, tracked and identified.
The laser radar measures the time difference between the emitted laser and the object reflected laser echo signal to perform accurate distance measurement; the intensity of the echo signal is an important measurement parameter for the distance detection of the laser radar, and even the echo signals with different intensities at the same position cause a considerable error in the measured distance, so the echo signals with different intensities need to be calibrated.
Generally, the calibration of the echo reflection intensity is performed by obtaining the variation relationship between the laser echo intensity value and the distance of a calibration plate with the same position and different surface reflectivities, however, since the dynamic range of the echo signal is very large, it is difficult to find the object reflectivity that can be matched to cover all the echo intensities, the further coverage of the echo intensity is realized by the distance variation by moving the calibration plate to different positions, and thus, the operation of moving the calibration plate consumes manpower and a large amount of time, and at the same time, a very large field is required, which severely restricts the calibration efficiency and the cost.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model provides a laser radar echo signal intensity calibration system, which can be used for easily adjusting the echo signal intensity to realize the calibration of the echo signal intensity without repeatedly moving and adjusting the position of a calibration plate, thereby saving a large amount of labor and time, being free from being restricted by site conditions and improving the calibration efficiency.
The technical scheme adopted by the utility model is as follows:
the utility model provides a laser radar echo signal intensity calibration system, includes laser radar, decay piece and calibration board, the decay piece is the disk, and its middle part is equipped with the through-hole, laser radar is used for launching detection laser and receives echo signal, and the detection laser of laser radar transmission passes the through-hole irradiation on the decay piece and produces echo signal on the calibration board to through the calibration board reflection, echo signal can pass and incide laser radar after the decay piece on and receive by laser radar, decay piece and calibration board all can be changed.
Based on the technical content, through laser radar transmission detection laser, make detection laser pass the through-hole irradiation on the decay piece and on the calibration board, and produce echo signal through the calibration board reflection, echo signal passes the decay piece again, it is received by laser radar to be shot to laser radar on after the decay piece decay, through the decay piece and the calibration board of changing different models, come to be received by laser radar with the echo signal that obtains different intensity, just can adjust echo signal intensity easily, realize the demarcation of echo signal intensity, and need not remove the position of adjusting the calibration board repeatedly, a large amount of manpowers and time have been saved, need not be restricted by site conditions simultaneously, calibration efficiency has been improved.
In one possible design, the system further comprises a focusing lens, which is disposed between the laser radar and the attenuation sheet, and is used for focusing the detection laser emitted by the laser radar on the calibration plate and focusing the echo signal passing through the attenuation sheet to be incident on the laser radar. During its application, can focus on the calibration board with the detection laser of laser radar transmission through setting up focus lens to on the echo signal focus that will pass the decay piece to laser radar, with the accuracy that laser radar echo signal intensity was markd effectively improves.
In one possible design, the detection laser focused by the focusing lens completely penetrates through the through hole on the attenuation sheet and irradiates the calibration plate. During its application, through making the through-hole that the detection laser after focusing lens focus on all passing the decay piece shine on the calibration board, integrality when can effectively guarantee detection laser and shine on the calibration board improves the accuracy that laser radar echo signal intensity was markd.
In one possible design, the system is equipped with attenuation sheets of several different attenuation values and calibration plates of several different reflectivities for replacement. When the laser radar echo signal intensity calibration device is used, the attenuation pieces with different attenuation values and the calibration plates with different reflectivities are provided for replacement, the attenuation pieces and the calibration plates can be flexibly selected according to actual requirements, and the laser radar echo signal intensity calibration can be conveniently and quickly completed.
In one possible design, the calibration plate is detachably mounted on a support frame. When the calibration plate is used, after the position is selected by adjusting the placing support frame, the calibration plate can be detachably installed on the support frame to be calibrated, and the calibration plate can be quickly replaced conveniently by detachably installing the calibration plate and the support frame.
In one possible design, a connecting piece is arranged on one side of the calibration plate, which is far away from the detection laser irradiation surface, and the connecting piece is used for inserting the support frame. When the quick connector is used, the quick connector is connected with the support frame through the corresponding connecting piece arranged on the calibration plate, so that the calibration plate can be quickly replaced conveniently.
The utility model has the beneficial effects that:
the utility model transmits the detection laser through the laser radar, so that the detection laser penetrates through the through hole on the attenuation sheet to irradiate the calibration plate and is reflected by the calibration plate to generate an echo signal, the echo signal penetrates through the attenuation sheet again and is attenuated by the attenuation sheet to be emitted to the laser radar to be received by the laser radar, and the echo signals with different intensities are obtained to be received by the laser radar by replacing the attenuation sheet and the calibration plate with different types, so that the intensity of the echo signal can be easily adjusted, the calibration of the intensity of the echo signal is realized, the position of the calibration plate does not need to be adjusted repeatedly, a large amount of manpower and time are saved, the restriction of site conditions is avoided, and the calibration efficiency is improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the following figures are introduced.
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: 1. a laser radar; 2. a focusing lens; 3. an attenuation sheet; 4. and (5) calibrating the board.
Detailed Description
The utility model is further described with reference to the following figures and specific embodiments. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Specific structural and functional details disclosed herein are merely illustrative of example embodiments of the utility model. This invention may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.
Example 1:
the embodiment provides a laser radar echo signal intensity calibration system, as shown in fig. 1, including laser radar 1, decay piece 3 and calibration board 4, decay piece 3 is the disk, and its middle part is equipped with the through-hole, laser radar 1 is used for launching detection laser and receives echo signal, and the detection laser of laser radar 1 transmission passes through the through-hole irradiation on the decay piece 3 on calibration board 4 to produce echo signal through calibration board 4 reflection, echo signal can pass and incide laser radar 1 after the decay piece 3 on and be received by laser radar, decay piece 3 and calibration board 4 all can be changed.
In particular, the system is provided with a plurality of attenuation sheets 3 with different attenuation values and a plurality of calibration plates 4 with different reflectivities for replacement. During its application, supply to change through the decay piece 3 that is equipped with a plurality of different attenuation values and the calibration board 4 of a plurality of different reflectivities, can carry out the flexibility of decay piece 3 and calibration board 4 according to actual demand and select, be convenient for accomplish the demarcation of 1 echo signal intensity of laser radar fast.
Through 1 transmission detection laser of laser radar, make detection laser pass through the through-hole on decay piece 3 and shine on calibration plate 4, and produce echo signal through calibration plate 4 reflection, echo signal passes decay piece 3 again, it is received by laser radar to be shot to laser radar 1 after 3 attenuations of decay piece, through decay piece 3 and the calibration plate 4 of changing different models, come to be received by laser radar with the echo signal that obtains different intensity, just can adjust echo signal intensity easily, realize the demarcation of echo signal intensity, and need not remove the position of adjusting the calibration plate repeatedly, a large amount of manpowers and time have been saved, need not be restricted by site conditions simultaneously, calibration efficiency has been improved.
Example 2:
as an optimization of the above embodiment, the system further includes a focusing lens 2, where the focusing lens 2 is disposed between the laser radar 1 and the attenuation sheet 3, and is used to focus the detection laser emitted by the laser radar 1 on the calibration plate 4, and focus the echo signal passing through the attenuation sheet 3 and then irradiate the laser radar 1. During the concrete implementation, can focus on calibration board 4 with the detection laser that laser radar 1 sent through setting up focusing lens 2 to on focusing on laser radar 1 with the echo signal that passes attenuator 3, with the accuracy of 1 echo signal intensity calibration of effective improvement laser radar.
Furthermore, all the detection laser focused by the focusing lens 2 passes through the through hole on the attenuation sheet 3 and irradiates on the calibration plate 4. During specific implementation, all detection laser focused by the focusing lens 2 penetrates through the through holes in the attenuation sheet 3 to irradiate the calibration plate 4, so that the integrity of the detection laser when the detection laser irradiates the calibration plate 4 can be effectively guaranteed, and the accuracy of calibrating the intensity of the echo signal of the laser radar 1 is improved.
Example 3:
as an optimization of the above embodiment, the calibration plate 4 is detachably mounted on a support frame. During the concrete implementation, put the support frame through the adjustment and select the position after, just can mark the use with the detachable installation of calibration plate 4 on the support frame, through the detachable installation of calibration plate 4 and support frame, be convenient for carry out the quick replacement of calibration plate 4.
Furthermore, one side of the calibration plate 4, which is far away from the irradiation surface of the detection laser, is provided with a connecting piece, and the connecting piece is used for splicing the support frame. During concrete implementation, through set up corresponding connecting piece on calibration plate 4 and come to peg graft with the support frame, be convenient for carry out calibration plate 4's quick replacement. Or the end far away from the calibration plate 4 on the connecting piece is provided with an external thread, the support frame is provided with a screw hole, and the end provided with the thread on the connecting piece is screwed into the screw hole to complete the installation of the calibration plate 4.
Furthermore, the attenuation sheet 3 is detachably mounted on a support frame. During the concrete implementation, put the support frame through the adjustment and select the position after, just can carry out the calibration use on the support frame with the detachable installation of decay piece 3, through the detachable installation of decay piece 3 with the support frame, be convenient for carry out decay piece 3's quick replacement.
Furthermore, a circular clamping hole with the shape matched with that of the attenuation sheet 3 can be arranged on the support frame, so that the attenuation sheet 3 is clamped in the circular clamping hole, and the attenuation sheet 3 can be quickly disassembled, assembled and replaced.
Further, the focusing lens 2 can be fixedly mounted on a movable support frame for use, and when the focus needs to be adjusted, the position of the support frame can be moved to adjust the focus of the focusing lens 2, so that the focus falls on the calibration plate 4.
The present invention is not limited to the above-described alternative embodiments, and various other forms of products can be obtained by anyone in light of the present invention. The above detailed description should not be taken as limiting the scope of the utility model, which is defined in the claims, and which the description is intended to be interpreted accordingly.
Claims (6)
1. The laser radar echo signal intensity calibration system is characterized in that: including laser radar (1), decay piece (3) and calibration board (4), decay piece (3) are the disk, and its middle part is equipped with the through-hole, laser radar (1) is used for launching detection laser and receives echo signal, and the detection laser of laser radar (1) transmission passes through-hole irradiation on decay piece (3) to calibration board (4) on to produce echo signal through calibration board (4) reflection, echo signal can pass and incide laser radar (1) after decay piece (3) on and be received by laser radar, decay piece (3) and calibration board (4) all can be dismantled the change.
2. The system for calibrating the intensity of the echo signal of the laser radar according to claim 1, wherein: the system further comprises a focusing lens (2), wherein the focusing lens (2) is arranged between the laser radar (1) and the attenuation sheet (3) and used for focusing detection laser emitted by the laser radar (1) on the calibration plate (4) and enabling an echo signal passing through the attenuation sheet (3) to be focused and then to be emitted to the laser radar (1).
3. The system for calibrating the intensity of the echo signal of the laser radar according to claim 2, wherein: the detection laser focused by the focusing lens (2) passes through the through hole on the attenuation sheet (3) and irradiates the calibration plate (4).
4. The system for calibrating the intensity of the echo signal of the laser radar according to claim 1, wherein: the system is equipped with a number of attenuation sheets (3) of different attenuation values and a number of calibration plates (4) of different reflectivity for replacement.
5. The system for calibrating the intensity of the echo signal of the laser radar according to claim 1, wherein: the calibration plate (4) is detachably arranged on a support frame.
6. The system for calibrating the intensity of the echo signal of the laser radar according to claim 5, wherein: one side of the calibration plate (4) deviating from the irradiation surface of the detection laser is provided with a connecting piece, and the connecting piece is used for inserting the support frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122213671.4U CN215894940U (en) | 2021-09-13 | 2021-09-13 | Laser radar echo signal intensity calibration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122213671.4U CN215894940U (en) | 2021-09-13 | 2021-09-13 | Laser radar echo signal intensity calibration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215894940U true CN215894940U (en) | 2022-02-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122213671.4U Active CN215894940U (en) | 2021-09-13 | 2021-09-13 | Laser radar echo signal intensity calibration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215894940U (en) |
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2021
- 2021-09-13 CN CN202122213671.4U patent/CN215894940U/en active Active
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