CN216387362U - Laser radar temperature compensation and distance calibration structure and laser radar - Google Patents
Laser radar temperature compensation and distance calibration structure and laser radar Download PDFInfo
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- CN216387362U CN216387362U CN202122865717.0U CN202122865717U CN216387362U CN 216387362 U CN216387362 U CN 216387362U CN 202122865717 U CN202122865717 U CN 202122865717U CN 216387362 U CN216387362 U CN 216387362U
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Abstract
The utility model relates to a temperature compensation and distance calibration structure of a laser radar, which comprises a laser emitting module, a laser receiving lens, a laser receiving plate, a laser reflecting module, a rotating mechanism and a radar outer cover, wherein a reflector positioned on an emergent ray track of the laser reflecting module is arranged in the radar outer cover, and the reflector is used for reflecting the received emergent ray of the laser reflecting module to the laser receiving lens; set up a speculum that is located the emergent ray orbit of laser reflection module in the radar dustcoat, this speculum is used for reflecting the emergent ray of received laser reflection module to laser receiving lens, and the reflection light path distance of this speculum is a definite value, and radar system compensates radar range finding through the difference of regularly comparing the detected value with this definite value, just can reduce the influence of ambient temperature change to radar range finding, improves radar range finding precision.
Description
Technical Field
The utility model relates to the technical field of laser radars, in particular to a laser radar temperature compensation and distance calibration structure and a laser radar.
Background
The DTOF laser radar adopts the flight time to carry out the distance measurement technology, and measures the distance according to the round-trip time difference of the laser pulse; in DTOF laser ranging applications (such as laser range finders, laser radars, etc.), the radar obtains the distance to an obstacle based on the flight time of laser, which requires the laser radar to accurately capture the laser emission time and the reflected light return time, and the laser emission time changes along with the change of the environmental temperature, thereby affecting the accurate capture of the laser emission time by a radar timing system.
The method for capturing the laser receiving time is that return light is converted into a current signal through a photosensitive device, the current signal is converted into a voltage signal through a TIA (transimpedance amplifier), the voltage signal is converted into a digital signal through a comparator and then is accessed into a timing system for processing, the photosensitive device, the comparator and the like are easily influenced by temperature to generate large signal delay, and the large signal delay is finally accumulated in the timing system to cause ranging deviation, so that a structure capable of assisting a radar system to perform laser radar temperature compensation and distance calibration is needed.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the present invention is to provide a temperature compensation and distance calibration structure for a laser radar, and also provide a laser radar, aiming at the above-mentioned defects in the prior art.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
construct a laser radar temperature compensation and distance calibration structure, wherein, including laser emission module, laser receiving lens, receipt laser receiving lens assemble laser receiver plate, the reflection of light the laser reflection module, the drive of the laser of laser emission module transmission the laser reflection module is rotatory in order to adjust the rotary mechanism of laser outgoing direction, and the cover is established the outer radar dustcoat of laser reflection module, be provided with in the radar dustcoat and be located reflector on the laser reflection module outgoing light orbit, the reflector is used for with receiving the outgoing light reflection of laser reflection module extremely laser receiving lens.
The utility model relates to a temperature compensation and distance calibration structure of a laser radar, wherein a first radar optical coupler plate is arranged in a radar outer cover, and a reflector is arranged on the first radar optical coupler plate.
The utility model relates to a temperature compensation and distance calibration structure of a laser radar, wherein a groove or a groove for mounting a reflector is formed in a first radar optical coupling plate.
The utility model relates to a temperature compensation and distance calibration structure of a laser radar, wherein a reflector is arranged on the inner wall of a radar outer cover.
The utility model relates to a laser radar temperature compensation and distance calibration structure, wherein a second radar optical coupling plate is arranged in a radar outer cover and is positioned between a reflector and a laser reflection module, and a through groove opposite to the reflector is formed in the second radar optical coupling plate.
The laser radar temperature compensation and distance calibration structure is characterized in that the laser emitting module and the laser receiving lens are coaxially arranged.
The laser radar temperature compensation and distance calibration structure is characterized in that the laser emitting module is arranged on the laser receiving lens in a penetrating mode.
The utility model relates to a laser radar temperature compensation and distance calibration structure, wherein a laser reflection module comprises an L-shaped tube and a reflection lens arranged at the bending position of the L-shaped tube.
The utility model relates to a temperature compensation and distance calibration structure of a laser radar, wherein a rotating mechanism comprises a lens support connected with a reflecting lens and a rotating driving unit driving the lens support to rotate.
A laser radar is provided with the laser radar temperature compensation and distance calibration structure.
The utility model has the beneficial effects that: use the structure of this application, set up a speculum that is located the outgoing light track of laser reflection module in the radar dustcoat, this speculum is used for reflecting the outgoing light of received laser reflection module to laser receiving lens, the reflection light path distance of this speculum is a definite value, radar system compensates through the difference of timing comparative detection value with this definite value, just can reduce the influence of ambient temperature change to radar range finding, improves radar range finding precision.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only part of the embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive efforts according to the accompanying drawings:
FIG. 1 is a structural diagram of a laser radar temperature compensation and distance calibration structure according to a preferred embodiment of the present invention;
fig. 2 is an exploded view of a first optical coupler plate, a laser reflection module and a rotation mechanism of a laser radar temperature compensation and distance calibration structure according to a preferred embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention.
The laser radar temperature compensation and distance calibration structure of the preferred embodiment of the utility model, as shown in fig. 1, refer to fig. 2 at the same time, including laser emission module 1, laser receiving lens 2, receive the laser receiver plate 3 of the convergent light of the laser receiving lens 2, reflect the laser reflection module 4 of the laser emitted by the laser emission module 1, drive the laser reflection module 4 to rotate in order to regulate the rotary mechanism 5 of the laser outgoing direction, and cover the radar housing 6 outside the laser reflection module, there are reflecting mirrors 7 located on the light path of outgoing light of the laser reflection module 4 in the radar housing 6, the reflecting mirror 7 is used for reflecting the outgoing light received from the laser reflection module 4 to the laser receiving lens 2;
by applying the structure, the reflector 7 positioned on the emergent ray track of the laser reflection module 4 is arranged in the radar outer cover 6, the reflector 7 is used for reflecting the received emergent ray of the laser reflection module 4 to the laser receiving lens 2, the distance of the reflected light path of the reflector 7 is a certain value, and the radar system compensates radar ranging by comparing the difference value of the detection value and the certain value at regular time, so that the influence of environment temperature change on radar ranging can be reduced, and the radar ranging precision is improved;
it should be noted that the functions of the radar system such as comparison and compensation are capabilities of the conventional radar system, and the present application is mainly intended to provide an auxiliary structure device, and does not involve software operations such as comparison and compensation.
The specific installation of the mirror 7 is explained as follows:
a preferred embodiment is: a first radar optical coupling plate 8 is arranged in the radar outer cover 6, and the reflector 7 is arranged on the first radar optical coupling plate 8; the existing structure of optical coupling plate radar, this structure itself can have certain drawback of blockking the reflection light of laser reflector module, directly sets up the speculum and can simplify the installation on the optical coupling plate, and when setting up the speculum at the optical coupling plate towards a side surface of laser reflector group, can avoid having increased the drawback of the reflection light's of blockking the laser reflector module volume because of the speculum brings.
Another preferred embodiment is different from the previous embodiment in that: a notch 80 or a groove for installing the reflector 7 is formed in the first radar optical coupler plate 8; this kind of mode can effectual reduction because of the problem that the opto-coupler plate thickness that the installation speculum brought increases, also avoids simultaneously increasing the drawback of the reflection light's of blockking the laser reflection module because of the speculum brings.
Another preferred embodiment is: the reflector is arranged on the inner wall of the radar outer cover; this way the object of this patent can also be achieved, but there is the disadvantage that the amount of reflected light blocking the laser reflection module is increased.
Another preferred embodiment is: a second radar optical coupling plate is arranged in the radar outer cover, is positioned between the reflector and the laser reflection module and is provided with a through groove opposite to the reflector; this kind of mode also can realize the purpose of this patent, also avoids increasing the drawback of the volume of the reflection ray who blocks laser reflection module because of the speculum brings.
Preferably, the laser emission module 1 and the laser receiving lens 2 are coaxially arranged, and preferably, the laser emission module 1 penetrates through the laser receiving lens 2; the integrity is good, and the volume is less.
Preferably, the laser reflection module 4 includes an L-shaped tube 40 and a reflection lens 41 disposed at a bending position of the L-shaped tube 40, and the rotation mechanism 5 includes a lens support 50 connected to the reflection lens 41, and a rotation driving unit 51 driving the lens support 50 to rotate; the integrity is good, the volume is small, and the stability is good.
A laser radar is provided with the laser radar temperature compensation and distance calibration structure.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the utility model as defined in the appended claims.
Claims (10)
1. The utility model provides a laser radar temperature compensation and distance calibration structure, its characterized in that includes laser emission module, laser receiving lens, receipt laser receiving lens assemble laser receiver board, the reflection of light the laser reflection module, the drive of the laser of laser emission module transmission the laser reflection module is rotatory in order to adjust the rotary mechanism of laser outgoing direction, and the cover is established the outer radar dustcoat of laser reflection module, be provided with in the radar dustcoat and be located reflector on the laser reflection module outgoing light orbit, the reflector is used for with receiving the outgoing light reflection of laser reflection module extremely laser receiving lens.
2. The lidar temperature compensation and distance calibration structure of claim 1, wherein a first radar optocoupler board is disposed within the radome, and wherein the reflector is disposed on the first radar optocoupler board.
3. The lidar temperature compensation and distance calibration structure according to claim 2, wherein the first radar optical coupler plate is provided with a slot or a groove for mounting the reflector.
4. The lidar temperature compensation and distance calibration structure of claim 1, wherein the mirror is disposed on an inner wall of the radome.
5. The lidar temperature compensation and distance calibration structure according to claim 4, wherein a second radar optical coupler plate is disposed in the radar housing, the second radar optical coupler plate is located between the reflector and the laser reflection module, and a through groove opposite to the reflector is disposed on the second radar optical coupler plate.
6. The lidar temperature compensation and distance calibration structure according to any of claims 1 to 5, wherein the laser transmitter module is disposed coaxially with the laser receiver lens.
7. The lidar temperature compensation and distance calibration structure of claim 6, wherein the laser transmitter module is disposed through the laser receiver lens.
8. The lidar temperature compensation and distance calibration structure according to any of claims 1 to 5, wherein the laser reflection module comprises an L-shaped tube and a reflector plate disposed at a bend of the L-shaped tube.
9. The lidar temperature compensation and distance calibration structure of claim 8, wherein the rotation mechanism comprises a lens holder coupled to the mirror plate, and a rotation driving unit for rotating the lens holder.
10. Lidar according to any of claims 1 to 9, characterized in that it is provided with a lidar temperature compensation and distance calibration structure according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122865717.0U CN216387362U (en) | 2021-11-22 | 2021-11-22 | Laser radar temperature compensation and distance calibration structure and laser radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122865717.0U CN216387362U (en) | 2021-11-22 | 2021-11-22 | Laser radar temperature compensation and distance calibration structure and laser radar |
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| Publication Number | Publication Date |
|---|---|
| CN216387362U true CN216387362U (en) | 2022-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122865717.0U Active CN216387362U (en) | 2021-11-22 | 2021-11-22 | Laser radar temperature compensation and distance calibration structure and laser radar |
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| CN (1) | CN216387362U (en) |
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2021
- 2021-11-22 CN CN202122865717.0U patent/CN216387362U/en active Active
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Effective date of registration: 20230905 Address after: 518000 room 1602, block a, building 7, Shenzhen International Innovation Valley, Dashi Road, Xili community, Xili street, Nanshan District, Shenzhen City, Guangdong Province Patentee after: SHENZHEN EAI TECHNOLOGY Co.,Ltd. Address before: 518000 503, floor 5, Caihuang factory office building on the east side of Qinghu Meiguan expressway, Qinghu community, Longhua street, Longhua District, Shenzhen, Guangdong Province Patentee before: Shenzhen more than Technology Co.,Ltd. |