CN115561736A - Laser radar non-maintaining guard shield and radar - Google Patents
Laser radar non-maintaining guard shield and radar Download PDFInfo
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- CN115561736A CN115561736A CN202211309961.1A CN202211309961A CN115561736A CN 115561736 A CN115561736 A CN 115561736A CN 202211309961 A CN202211309961 A CN 202211309961A CN 115561736 A CN115561736 A CN 115561736A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
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- Computer Networks & Wireless Communication (AREA)
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- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
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- Optical Radar Systems And Details Thereof (AREA)
Abstract
The invention belongs to the technical field of laser radars, and particularly relates to a maintenance-free laser radar shield and a laser radar with the same, wherein the shield comprises a shield body and a light transmitting surface, the shield body is connected with a main body module of a radar and is sealed through a sealing strip, the main body module and a rotating module of the radar are sealed by the shield body, and a storage module of the radar is positioned outside the shield body; the light-transmitting surface is positioned in front of the ranging direction of the laser radar and comprises a detection window and a light-transmitting coating film; the detection window is made of transparent materials, the light-transmitting coating films are organic films with high light transmittance, and the light-transmitting coating films are attached to the surface of the detection window through thermal processing. After the film is stained, the radar can be continuously used only by being taken off, the long-time long-life use of the laser radar is ensured, the structure is simple, the processing is convenient, and the production cost is reduced.
Description
Technical Field
The invention relates to the technical field of laser radars, in particular to a maintenance-free protective cover of a laser radar and the radar.
Background
LiDAR (Light Laser Detection and Ranging) is a radar that uses a Laser as a radiation source. The method comprises the steps of detecting characteristic quantities such as the position and the speed of a target by emitting a laser beam, emitting the laser beam to the target by a transmitter, comparing a received signal reflected from the target with the emitted signal, and processing to obtain information such as the distance, the direction, the height, the speed, the posture and even the shape of the target, thereby detecting, tracking and identifying the target.
The current protective covers of laser radars have the disadvantage of being easily contaminated with dust and scratched. When the protective cover is dirty, the traditional solution is to replace the protective cover, which is costly and affects the ranging effect and the sealing grade of the laser radar after replacement. Or systems that employ water spray cleaning. The sensor senses the fouling degree of the protective cover, and the protective cover is scraped clean by a windshield wiper in due time. For example, CN110208772A discloses a laser radar protection cover, which comprises a brushing part, a driving device and a protection cover body covering the laser radar, wherein the driving device can control the relative movement between the brushing part and the protection cover body, so that the brushing part at least brushes the outer side wall of the protection cover body. Through install above-mentioned laser radar safety cover in addition at laser radar, prevent that laser radar's optics protective surface is impaired because of suffering the foreign object striking, improved laser radar's waterproof performance simultaneously to a certain extent. This method requires additional components, is complicated in structure and operation, is costly, and is subject to failure. Therefore, a device which has a simple structure and low cost, can effectively prolong the service life of the radar shield and improve the service performance is urgently needed.
Disclosure of Invention
Aiming at the defects of the prior technical scheme, the invention aims to provide a maintenance-free laser radar shield and a radar.
In order to achieve the above object, one or more embodiments of the present invention provide the following technical solutions:
in a first aspect, the invention discloses a maintenance-free protective cover for a laser radar, which comprises a protective cover body and a light-transmitting surface, wherein the protective cover body is connected with a laser transmitting and receiving unit of the radar and sealed through a sealing strip, the laser transmitting and receiving unit and a rotating unit of the radar are sealed by the protective cover body, and a storage unit of the radar is positioned outside the protective cover body.
As a further technical scheme, the light-transmitting surface is positioned in front of the ranging direction of the laser radar and comprises a detection window and a light-transmitting coating film.
As a further technical scheme, the detection window is made of transparent materials.
As a further technical scheme, the light-transmitting coating film is an organic film with high light transmittance.
As a further technical scheme, the light-transmitting coating films are attached to the surface of the detection window through thermal processing.
As a further technical scheme, the invention also provides a laser radar with the maintenance-free shield.
The detection window of the maintenance-free protective cover adopts multiple layers of high-light-transmission films to protect the detection window 2, the multiple layers of light-transmission films are compositely adhered to the surface of the protective cover through thermal processing, and when the first layer of film is contaminated, the film only needs to be removed, so that the long-time long-life use of the laser radar is ensured. Adopt the guard shield body to seal the laser emission receiving element and the rotation unit of radar and protect, the memory cell of radar is located the guard shield originally externally, and the detachable construction of memory cell for easily changing need not to change whole laser radar when breaking down, and the cost is reduced has just made things convenient for data storage.
Drawings
The invention is further illustrated by the following examples in conjunction with the drawings.
FIG. 1 is a schematic diagram of a maintenance-free protective cover for a laser radar according to the present invention;
FIG. 2 is a schematic diagram of a unitized lidar laser transmit-receive unit and a memory unit adapted for use with a maintenance-free shroud;
FIG. 3 is a schematic diagram of a unitized lidar rotary unit adapted to a maintenance-free shroud;
fig. 4 is a schematic diagram of a rotary unit positioning and recognizing system.
In the figure: the detection device comprises a body 1, a detection window 2, a light-transmitting coating 3, a sealing strip 4, a laser emission receiving unit 5, a storage unit 6, a rotating unit 7, a mounting hole 8, a screw 9, a storage cavity 10, a mounting column 11, a deflection mirror 12, a light outlet pipe 13, a rotating unit support 14, a rotating unit mounting plate 15, a stepping motor 16, a motor shaft 17, a positioning groove 18, a first positioning column 19, a second positioning column 20, a third positioning column 21, a positioning probe 22, a spring 23 and a pressure sensor 24.
Detailed Description
So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict. However, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
The invention discloses a maintenance-free protective cover for a laser radar, which comprises a protective cover body 1 and a light-transmitting surface, wherein the protective cover body is connected with a laser transmitting and receiving unit of the radar and sealed by a sealing strip 4, the laser transmitting and receiving unit and a rotating unit of the radar are sealed and protected by the protective cover body, and a storage unit of the radar is positioned outside the protective cover body.
The light-transmitting surface is located in the front of the ranging direction of the laser radar and comprises a detection window 2 and a light-transmitting coating film 3, wherein the detection window 2 is made of transparent materials such as quartz glass, the light-transmitting coating film 3 can be made of organic films with high light transmittance in the market such as polyester films, the detection window 2 is protected, the light-transmitting coating film 3 is provided with multiple layers, the multiple layers of light-transmitting coating films are attached to the surface of the protective cover through hot processing in a compounding mode, when the first layer of film is stained, only the first layer of film needs to be removed, and the like, so that long-time long-life use of the laser radar is guaranteed.
The invention also discloses a laser radar device with a unitized structure combined with the maintenance-free protective cover, wherein the current rotating mirror type laser radar mainly comprises a main body part, a rotating part and a storage part, but the structures of the rotating mirror type laser radar are all designed into an integral structure, and when a certain part is damaged, the whole laser radar needs to be replaced, so that the production and use costs are increased. In order to solve the above problems, the lidar of the present invention adopts a unitized design, as shown in fig. 2-3, including a laser transmitter-receiver unit 5, a storage unit 6, and a rotation unit 7.
The rotating unit is located above the laser transmitting and receiving unit, the storage unit is located below the laser transmitting and receiving unit, the storage unit is provided with a mounting hole and forms a detachable connection structure with the laser transmitting and receiving unit, and one side of the storage unit is provided with a storage cavity 10 for accommodating a storage circuit board.
And a mounting column 11 corresponding to the mounting hole is arranged below the laser transmitting and receiving unit. Meanwhile, laser emitting and receiving components such as a laser emitter, a laser collimator, a laser receiver, a receiving lens, a shielding device and the like are arranged in the laser emitting and receiving unit. The lower part of the laser transmitting and receiving unit is connected with the protective cover, and the connecting surface is provided with a sealing strip, so that the laser transmitting and receiving unit and the rotating unit above the laser transmitting and receiving unit can work under the sealing strip.
The position of the rotating unit corresponding to the laser transmitter is provided with a deflection mirror 12, a light outlet tube 13 is arranged in front of the deflection mirror, one side of the rotating unit is provided with a rotating unit supporting bracket 14, a mounting block 15 connected with the laser transmitting and receiving unit is arranged below the supporting bracket, the supporting bracket can be connected or detached through a screw, the supporting bracket is also provided with a stepping motor 16, the stepping motor is positioned at the top of the rotating unit, and a motor shaft 17 of the stepping motor is connected with the deflection mirror and drives the deflection mirror and the light outlet tube to rotate.
This laser radar device of unitized construction is through carrying out the unitized design with whole radar, divide into laser emission receiving element, memory cell and rotary unit, can realize dismantling the change through simple screw between each unit, and easily user uses the maintenance to memory cell independent design need not carry out data configuration again when changing the radar, reduces use cost.
In addition, the unitized laser radar device is a detachable connection structure, and the rotation of the deflection mirror is realized by the motor according to a preset mode, so that the laser radar normally works, the rotation can be continuous, and a stepping motor can also be adopted to carry out pulse-type angle-making rotation. Therefore, the inventor of the present invention has analyzed that a positioning device is selectively disposed on a motor so as to find problems as early as possible, and a rotating unit with a fault can be found and replaced in real time, specifically, as shown in fig. 4, the positioning structure includes a positioning groove 18 disposed on the motor, three positioning pillars are disposed in the positioning groove, the three positioning pillars are disposed in axial symmetry along a motor shaft in the positioning groove, and for simplicity, the positioning pillars are shown in a plane, each positioning pillar is disposed on an inclined plane, and the inclined plane and the horizontal direction have different angles, and meanwhile, the lowest points of the 3 inclined planes are located on the same horizontal plane, and specifically, the positioning structure includes a first positioning pillar 19, the inclined plane and the horizontal direction have an angle of 11 °, a second positioning pillar 20, the inclined plane and the horizontal direction have an angle of 24 °, and a third positioning pillar 21, the inclined plane and the horizontal direction have an angle of 37 °. The locating groove is provided with a locating probe 22 with a spring 23 above, the spring is connected with a pressure sensor 24 and is connected with a locating recognition circuit, the locating probe with the spring is driven by a motor to rotate, the locating probe is synchronous with the rotation of a motor shaft, a probe tip and the lowest point of an inclined plane are on the same horizontal plane, the probe is suspended during normal rotation, the circuit is disconnected, when the probe contacts 3 locating columns, the circuit is connected, because the angles of the inclined planes of the three locating columns and the horizontal direction are different, when the highest point of the inclined planes is reached, the spring compression degree of the probe is also different, different pressures are generated on the pressure sensor, different electric signals are sent to the locating recognition circuit, the current position of the probe can be rapidly judged, compared with preset settings, if the locating recognition circuit is different from the preset conditions, the red light warning can be sent by the locating recognition circuit, a user is reminded to replace a rotating unit immediately, at the moment, the user can screw on a mounting plate of the rotating unit can be screwed down, and the rotating unit can be replaced. The positioning device has a very simple structure, a plurality of positioning columns are easy to process in batches, and a very good identification effect is achieved no matter continuous rotation or stepping rotation is achieved.
In light of the foregoing description of the preferred embodiment of the present invention, it is to be understood that numerous changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (6)
1. The utility model provides a laser radar non-maintaining guard shield which characterized in that: including guard shield body and printing opacity face, the guard shield body is connected with the main part module of radar and seals through the sealing strip, and the guard shield body seals the main part module and the rotating module of radar, and the storage module of radar is located the guard shield originally externally.
2. The lidar maintenance-free cover of claim 1, wherein: the light-transmitting surface is positioned in front of the ranging direction of the laser radar and comprises a detection window and a light-transmitting coating film.
3. A lidar maintenance-free cover as defined in claim 2, wherein: the detection window is made of transparent materials.
4. The lidar maintenance-free cover of claim 1, wherein: the light-transmitting coating film is an organic film with high light transmittance.
5. The lidar maintenance-free cover of claim 1, wherein: the light-transmitting coating films are attached to the surface of the detection window through thermal processing.
6. Lidar provided with a maintenance-free shield according to any of claims 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211309961.1A CN115561736B (en) | 2022-10-25 | 2022-10-25 | Laser radar maintenance-free shield and radar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211309961.1A CN115561736B (en) | 2022-10-25 | 2022-10-25 | Laser radar maintenance-free shield and radar |
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| CN115561736A true CN115561736A (en) | 2023-01-03 |
| CN115561736B CN115561736B (en) | 2023-10-13 |
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