CN112731348B - A multi-angle differential absorption device based on lidar - Google Patents

Abstract

The invention discloses a multi-angle differential absorption device based on laser radar. An expanded reflection component is installed on the outside of the differential absorption laser radar body. The bottom cover is sleeved on the bottom end of the differential absorption laser radar body. A reflective film is bonded to the top surface of the plastic film. , a lubrication and refueling component is installed at the bottom of the bottom cover, an adjustment component is installed at the bottom of the differential absorption lidar body, a positioning support component is connected to the bottom of the base, and the adjustment screw is connected to the support ring through threads. This invention uses the reflection of the expanded reflection component The film reflects electromagnetic waves, making it easier for the differential absorption lidar body to receive more information through reflection. By using the positioning support component and the adjustment component, the device fits better with the ground and prevents sliding when placed. The adjustment component adjusts the angle and position of the radar until It is horizontal to facilitate the normal operation of the radar. It works together with the expanded reflection component and the lubricating and refueling component to achieve the best adjustment and use effect.

Description

A multi-angle differential absorption device based on lidar

Technical field

The present invention relates to the technical field of laser radar, and is specifically a multi-angle differential absorption device based on laser radar.

Background technique

Lidar is a radar system that emits a laser beam to detect characteristics such as the position and speed of a target. Lidar is an advanced detection method that combines laser technology with modern photoelectric detection technology. Lidar technology for detecting atmospheric pollutants is very important in the atmospheric environment and atmosphere. Fields such as chemistry, atmospheric radiation monitoring and analysis, and climate forecasting are playing a pivotal role.

The patent application number 201811513928.4 mentions "a differential absorption laser radar that can be adjusted at multiple angles". The device has a compact structure and through the joint action of the angle adjustment mechanism and the rotation mechanism, it can conveniently realize the multi-directional multi-directional differential absorption laser radar. Angle adjustment, and at the same time, a locking mechanism is added to effectively fix the differential absorption laser radar to ensure accurate monitoring results. However, during use of the radar, due to the fixed area and shape of the radar, when receiving information transmitted from different directions, the reception The effect is poor and less information is received, which prolongs the time for information reception and makes the information processing effect worse.

Contents of the invention

The present invention provides a multi-angle differential absorption device based on laser radar, which can effectively solve the problem of fixed radar area and shape proposed in the above background technology. When receiving information transmitted in different directions, the receiving effect is poor and the received information is less. , thus prolonging the time for information reception and worsening the information processing effect.

To achieve the above objectives, the present invention provides the following technical solution: a differential absorption lidar body, an expanded reflection assembly installed on the outside of the differential absorption lidar body, and the expanded reflection assembly includes a bottom cover, a folding cover, a plastic film, and a metal sheet , reflective film, connecting spring, steel wire rope, roller frame, roller, drive motor, winding frame, heat insulation film, blower fan, exhaust hole and dust filter;

The expanded reflection component includes a bottom cover. The bottom cover is sleeved on the bottom end of the differential absorption laser radar body. A folding cover is bonded to the top edge of the bottom cover. A plastic is bonded to the top edge of the folding cover. film, a metal sheet is evenly bonded to the bottom end of the plastic film, a reflective film is bonded to the top surface of the plastic film, a connecting spring is spot-welded in the middle of one end of the metal sheet, and the end of the connecting spring away from the metal sheet is welded to the bottom On the inner wall of the cover, a steel wire rope is connected to the middle of the bottom surface of the metal sheet. A roller frame is evenly welded to the middle of the inner wall of the bottom cover. Rollers are installed in the middle of the roller frame through a rotating shaft. A drive motor is installed in the middle of the bottom end of the differential absorption laser radar body. , a winding frame is installed at the output shaft end of the driving motor, one end of the steel wire rope is connected to the middle of the winding frame around the roller, and the input end of the driving motor is electrically connected to the output end of the external power supply;

A heat-insulating film is bonded to the bottom surface of the bottom cover. Both ends of the bottom surface of the bottom cover are inlaid with ventilation fans. There are even exhaust holes in the middle of the bottom end of the bottom cover. One end of the ventilation fan and the interior of the exhaust hole are evenly spaced. Installed dust filter;

A lubricating and refueling assembly is installed at the bottom end of the bottom cover.

Preferably, the end of a plurality of roller frames away from the bottom cover is fixedly installed on the bottom end of the differential absorption lidar body, and the plurality of roller frames are all located at the same circular edge.

Preferably, the plastic film is provided with folding grooves corresponding to the gaps between adjacent metal sheets, and the length of the metal sheet is equal to the width of the plastic film.

Preferably, the lubrication and refueling assembly includes an oil passage groove, a sponge sleeve, an oil penetration hole, a thick cotton strip, a connecting pipe, an oil tank, a sponge strip, an oil plug and a sealing ring;

The oil passage groove is opened at the bottom end of the winding frame, and the sponge casing is sleeved at the internal winding position of the winding frame. The internal winding position of the winding frame is evenly provided with oil holes near the inner wall of the sponge casing. A thick cotton strip is placed inside the oil passage hole, and a connecting pipe is connected to the bottom end of the oil passage tank. The connecting pipe runs through the bottom cover and is connected to the oil tank. Sponge strips are placed inside the oil passage tank and the connecting pipe. An oil plug is installed in the middle of the bottom end of the oil tank, and a sealing ring is bonded to the top of the oil tank near the bottom cover.

Preferably, the inside of the oil tank is filled with lubricating oil, the depth of the oil penetration hole is equal to the length of the thick cotton sliver, and both ends of the thick cotton sliver contact the sponge casing and the sponge strip respectively.

Preferably, an adjustment assembly is installed on the bottom end of the differential absorption lidar body, and the adjustment assembly includes a main hydraulic rod, an auxiliary hydraulic rod, a turntable, a base, a sealing rubber ring, an adjusting hydraulic rod and a level;

The top end of the main hydraulic rod is rotatably installed on one side of the middle part of the bottom end of the bottom cover, and an auxiliary hydraulic rod is installed on the other side of the middle part of the bottom end of the bottom cover. Both the main hydraulic rod and the auxiliary hydraulic rod are installed on the top of the turntable. A base is connected to the bottom end of the outer side of the turntable, and a sealing rubber ring is bonded to the connection between the base and the turntable. Adjustable hydraulic rods are evenly distributed at the inner bottom of the base, and the top ends of the adjustment hydraulic rods are connected to the turntable through universal joints. At the bottom end, the top edge of the top of the turntable is evenly inlaid with a spirit level.

Preferably, the inner wall and outer wall of the sealing rubber ring are respectively bonded to the bottom edge of the turntable and the top of the base, and the thickness of the middle part of the longitudinal section of the sealing rubber ring is greater than the thickness of both sides.

Preferably, the bottom end of the base is sleeved with a positioning support assembly, which includes a support ring, a storage groove, a diamond-shaped groove, a square prism, an adjusting screw, a bottom plate, a sliding groove, a support tube and a support spring;

The support ring is sleeved on the bottom edge of the base. A storage groove is evenly provided at the bottom of the support ring. A diamond-shaped groove is provided in the middle of the top surface of the storage groove. A four-sided prism is slidably installed inside the diamond-shaped groove. The four prisms are slidably installed inside. The top of the prism is rotated with an adjusting screw installed, and the adjusting screw is connected to the support ring through threads. The bottom end of the four-sided prism is welded with a bottom plate corresponding to the internal position of the storage tank. The bottom surface of the bottom plate is evenly provided with sliding grooves. Inside the sliding groove A support support tube is slidably installed, and the inner bottom end of the support tube is welded with a support spring connected to the inner top of the sliding groove.

Preferably, the storage groove fits the bottom plate, and the sliding groove fits the support tube.

Preferably, the bottom ends of several of the support tubes are sleeved with replacement pads.

Compared with the existing technology, the beneficial effects of the present invention are: the structure of the present invention is scientific and reasonable, and it is safe and convenient to use;

1. An expanded reflection component is provided. When receiving information, the motor drives the winding frame to rotate and pulls the wire rope to wind or unwind. At this time, the connecting spring shrinks and stretches, pushing the metal sheet to move, thereby changing the plastic. The angle of the reflective film on the outside of the film allows the differential absorption lidar body to receive more information through reflection, thereby quickly obtaining the required data and improving the overall information processing efficiency.

2. It is equipped with a heat insulation film, a supply fan and an exhaust hole. The external air is sent into the gap between the differential absorption lidar body and the bottom cover through the supply fan for heat dissipation. The heat-exchanged air is discharged from the exhaust hole. , lowering the temperature of the radar, and the bottom cover also plays a protective role to ensure the normal operation of the radar.

3. There is a lubricating and refueling component, which adds lubricating oil into the oil tank. The lubricating oil soaks the sponge strip, thick cotton strip and sponge casing in turn, and transports the lubricating oil. During use, the steel wire rope continuously squeezes the sponge casing to push the lubricating oil into the oil tank. A small amount of lubricating oil is squeezed out and soaked in the steel wire rope. Through capillary phenomenon, the lubricating oil flows along the small gaps in the steel wire rope. It prevents rust while ensuring the smooth sliding of the steel wire rope and ensuring the normal operation of the expanded reflection assembly.

To sum up, the reflective film of the expanded reflective assembly is used to reflect electromagnetic waves, which facilitates the differential absorption lidar body to receive more information through reflection. The thermal insulation film, supply fan and exhaust hole, and lubricating and refueling components assist the expanded reflective assembly to ensure expansion. The reflective component runs smoothly and is more convenient to use.

4. An adjustment component is provided. After the radar is installed and placed, the main hydraulic rod, auxiliary hydraulic rod and multiple adjustment hydraulic rods are used to jointly adjust the turntable with the radar installed, change the inclination angle of the turntable, and then use the level to determine whether to place it. Horizontal, multiple devices operate simultaneously to achieve the best placement effect.

5. There is a positioning support component. When placed, the bottom surface of the support ring contacts the ground. If the ground is rugged, turn the adjusting screw to push the bottom plate downward. At this time, the support tube stretches through the action of the support spring to match the pits on the ground. Longer, or shrink according to the bulges on the ground, the effect of fitting better with the ground is to prevent sliding when placed, and the placement is more stable, ensuring the stability of the radar during operation.

In summary, by using the positioning support component and the adjustment component, the device has a better fit with the ground and prevents sliding when placed. The adjustment component adjusts the angle and position of the radar until it is horizontal, which facilitates the normal operation of the radar. It also cooperates with the expanded reflection component and lubrication. The components work together to achieve optimal adjustment and use.

Description of the drawings

The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

In the attached picture:

Figure 1 is a schematic structural diagram of the present invention;

Figure 2 is a schematic structural diagram of the expanded reflection assembly of the present invention;

Figure 3 is a schematic structural diagram of area A in Figure 2 of the present invention;

Figure 4 is a schematic structural diagram of the lubricating and refueling assembly of the present invention;

Figure 5 is a schematic diagram of the installation structure of the sponge casing of the present invention;

Figure 6 is a schematic structural diagram of area B in Figure 5 of the present invention;

Figure 7 is a schematic structural diagram of the adjustment assembly of the present invention;

Figure 8 is a schematic structural diagram of the positioning support assembly of the present invention;

Numbers in the figure: 1. Differential absorption lidar body;

2. Expanded reflective component; 201. Bottom cover; 202. Folding cover; 203. Plastic film; 204. Metal sheet; 205. Reflective film; 206. Connecting spring; 207. Wire rope; 208. Roller frame; 209. Roller; 210 , drive motor; 211, winding frame; 212, insulation film; 213, blower fan; 214, exhaust hole; 215, dust filter;

3. Lubrication and refueling components; 301. Oil groove; 302. Sponge casing; 303. Oil penetration hole; 304. Thick cotton strip; 305. Connecting pipe; 306. Oil tank; 307. Sponge strip; 308. Oil plug; 309 , sealing ring;

4. Adjustment components; 401, main hydraulic rod; 402, auxiliary hydraulic rod; 403, turntable; 404, base; 405, sealing rubber ring; 406, adjusting hydraulic rod; 407, level;

5. Positioning support component; 501. Support ring; 502. Storage groove; 503. Diamond groove; 504. Square prism; 505. Adjustment screw; 506. Bottom plate; 507. Sliding groove; 508. Support tube; 509. Support spring.

Detailed ways

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

Embodiment: As shown in Figures 1-8, the present invention provides a technical solution for a multi-angle differential absorption device based on lidar, which includes a differential absorption lidar body 1. An expanded reflection component 2 is installed on the outside of the differential absorption lidar body 1. The expanded reflective assembly 2 includes a bottom cover 201, a folding cover 202, a plastic film 203, a metal sheet 204, a reflective film 205, a connecting spring 206, a wire rope 207, a roller frame 208, a roller 209, a drive motor 210, a winding frame 211, and heat insulation. Membrane 212, blower fan 213, air exhaust hole 214 and dust filter 215;

The expanded reflection component 2 includes a bottom cover 201. The bottom cover 201 is sleeved on the bottom end of the differential absorption laser radar body 1. A folding cover 202 is bonded to the top edge of the bottom cover 201. A plastic film is bonded to the top edge of the folding cover 202. 203. The bottom end of the plastic film 203 is evenly bonded with a metal sheet 204. The plastic film 203 has folding grooves corresponding to the gaps between adjacent metal sheets 204. The length of the metal sheet 204 is equal to the width of the plastic film 203, which facilitates bending of the plastic. Film 203, a reflective film 205 is bonded to the top surface of the plastic film 203, a connecting spring 206 is spot-welded in the middle of one end of the metal sheet 204, the end of the connecting spring 206 away from the metal sheet 204 is welded to the inner wall of the bottom cover 201, and a steel wire rope is connected to the middle of the bottom surface of the metal sheet 204 207. A roller frame 208 is evenly welded in the middle of the inner wall of the bottom cover 201. Several roller frames 208 are fixedly installed on the bottom end of the differential absorption laser radar body 1 at one end away from the bottom cover 201. Several roller frames 208 are all at the same circular edge, so that the pull The steel wire rope 207 maintains uniform tension. A roller 209 is installed in the middle of the roller frame 208 through a rotating shaft. A drive motor 210 is installed in the middle of the bottom end of the differential absorption lidar body 1. A winding frame 211 is installed at the output shaft end of the drive motor 210. One end of the steel wire rope 207 The bypass roller 209 is connected to the middle part of the winding frame 211, and the input end of the drive motor 210 is electrically connected to the output end of the external power supply;

A thermal insulation film 212 is bonded to the bottom surface of the bottom cover 201. Both ends of the bottom surface of the bottom cover 201 are inlaid with blower fans 213. There are evenly spaced exhaust holes 214 in the middle of the bottom end of the bottom cover 201. One end of the blower fan 213 and the inside of the exhaust hole 214 are evenly spaced. Dust filter 215 is installed;

A lubricating and refueling assembly 3 is installed at the bottom of the bottom cover 201 .

The lubrication and refueling assembly 3 includes an oil passage 301, a sponge sleeve 302, an oil penetration hole 303, a thick cotton strip 304, a connecting pipe 305, an oil tank 306, a sponge strip 307, an oil plug 308 and a sealing ring 309;

The oil passage groove 301 is opened at the bottom of the winding frame 211. The sponge casing 302 is connected to the internal winding position of the winding frame 211. The internal winding position of the winding frame 211 is close to the inner wall of the sponge casing 302, and oil permeable holes 303 are evenly provided. , a thick cotton strip 304 is placed inside the oil hole 303, a connecting pipe 305 is connected to the bottom of the oil channel 301, the connecting pipe 305 penetrates the bottom cover 201 and is connected to the oil tank 306, and a sponge strip 307 is placed inside the oil channel 301 and the connecting pipe 305. , the oil tank 306 is filled with lubricating oil. The depth of the oil penetration hole 303 is equal to the length of the thick cotton sliver 304. Both ends of the thick cotton sliver 304 contact the sponge sleeve 302 and sponge strip 307 respectively to facilitate attracting lubricating oil. The middle part of the bottom end of the oil tank 306 An oil plug 308 is installed, and a sealing ring 309 is bonded to the top of the oil tank 306 near the bottom cover 201.

An adjustment component 4 is installed at the bottom of the differential absorption lidar body 1. The adjustment component 4 includes a main hydraulic rod 401, an auxiliary hydraulic rod 402, a turntable 403, a base 404, a sealing rubber ring 405, an adjusting hydraulic rod 406 and a level 407;

The top end of the main hydraulic rod 401 is rotatably installed on one side of the middle part of the bottom end of the bottom cover 201. An auxiliary hydraulic rod 402 is installed on the other side of the middle part of the bottom end of the bottom cover 201. The main hydraulic rod 401 and the auxiliary hydraulic rod 402 are both installed on the top of the turntable 403. A base 404 is connected to the outer bottom end of 403. A sealing rubber ring 405 is bonded at the connection between the base 404 and the turntable 403. The inner and outer walls of the sealing rubber ring 405 are respectively bonded to the bottom edge of the turntable 403 and the top of the base 404. The sealing rubber ring 405 The thickness in the middle of the longitudinal section is greater than the thickness on both sides, which facilitates the movement of the turntable 403. There are adjustment hydraulic rods 406 evenly distributed at the bottom end of the base 404. The top ends of the adjustment hydraulic rods 406 are connected to the bottom end of the turntable 403 through universal joints. The top edge of the turntable 403 is evenly inlaid. There are 407 levels.

The bottom end of the base 404 is sleeved with a positioning support component 5. The positioning support component 5 includes a support ring 501, a storage groove 502, a diamond groove 503, a square prism 504, an adjusting screw 505, a bottom plate 506, a sliding groove 507, a support tube 508 and a support spring. 509;

The support ring 501 is sleeved on the bottom edge of the base 404. The bottom end of the support ring 501 is evenly provided with a storage groove 502. A diamond-shaped groove 503 is provided in the middle of the top surface of the storage groove 502. A square prism 504 is slidably installed inside the diamond groove 503. The square prism 504 An adjusting screw 505 is mounted on the top, and the adjusting screw 505 is threaded through and connected to the support ring 501. A bottom plate 506 is welded to the bottom of the square prism 504 corresponding to the internal position of the storage slot 502. A sliding groove 507 is evenly provided on the bottom surface of the bottom plate 506. Inside the sliding groove 507 A support tube 508 is slidably installed. The storage groove 502 fits the bottom plate 506. The sliding groove 507 fits the support tube 508, which facilitates the installation of the bottom plate 506 and the support tube 508. Several support tubes 508 are sleeved with replacement pads at the bottom to facilitate replacement according to the ground conditions. pad to achieve a better fixing effect, the inner bottom end of the support tube 508 is welded with a support spring 509 connected to the inner top of the sliding groove 507.

The working principle and usage process of the present invention: Place the differential absorption lidar body 1 on the ground. When placed, the bottom surface of the support ring 501 contacts the ground. If the ground is rugged and easy to shake after placement, rotate the adjusting screw 505. The adjusting screw 505 pushes the square prism 504 to slide in the diamond groove 503, and pushes the bottom plate 506 to move downward and out of the storage groove 502. At this time, the support tube 508, through the action of the support spring 509, stretches to match the pits on the ground, or to match the convexities on the ground. Start and shrink until the bottom end of the support tube 508 is in contact with the ground, and the fit with the ground is better. Turn the remaining adjustment screws 505 in turn until the placement is stable to prevent sliding during placement, and the placement is more stable to ensure the radar is working properly. stability;

After the radar is installed and placed, the main hydraulic rod 401 and the auxiliary hydraulic rod 402 are started at the same time to push the differential absorption lidar body 1 to move and change the angle. Multiple adjustment hydraulic rods 406 are started in sequence to push the turntable 403 to tilt and adjust multiple times until The bubble in the level 407 is in the center, and the level is adjusted jointly by the main hydraulic rod 401, the auxiliary hydraulic rod 402 and multiple adjustment hydraulic rods 406 to achieve the best placement effect;

When receiving information, the driving motor 210 drives the winding frame 211 to rotate, pulling the steel wire rope 207 to wind or unwind. At this time, the steel wire rope 207 slides along the outside of the roller 209 in the roller frame 208, pulling the metal sheet 204 to move, and connecting The spring 206 contracts and stretches accordingly, thereby changing the angle of the reflective film 205 on the outside of the plastic film 203. The reflective film 205 is a silver-plated film. More information waves are reflected through the reflective film 205, and the information waves are transmitted to the location where the information is received, so as to facilitate Through reflection, the differential absorption lidar body 1 receives more information, thereby quickly obtaining the required data and improving the overall information processing efficiency;

The heat insulation film 212 is an aluminum-plated film. The outside air is sent into the gap between the differential absorption laser radar body 1 and the bottom cover 201 through the fan 213 for heat dissipation. The heat-exchanged air is discharged from the exhaust hole 214, reducing the The temperature of the radar, and the bottom cover 201 also plays a protective role to ensure the normal operation of the radar;

Add lubricating oil into the oil tank 306. The lubricating oil soaks the sponge strip 307, the thick cotton strip 304 and the sponge sleeve 302 in sequence, and transports the lubricating oil. During the use of the expanded reflection assembly 2, the steel wire rope 207 continuously squeezes the sponge sleeve 302. , squeeze out a small amount of lubricating oil and soak the steel wire rope 207. Through capillary phenomenon, the lubricating oil flows along the small gaps of the steel wire rope 207, preventing rust while ensuring the smoothness of the sliding of the steel wire rope 207 and ensuring the normal operation of the expanded reflection assembly 2;

By using the positioning support component 5 and the adjustment component 4, the device fits better with the ground and prevents sliding when placed. The adjustment component 4 adjusts the angle and position of the radar until it is horizontal to facilitate the normal operation of the radar, and cooperates with the expanded reflection component 2 and lubrication The refueling components 3 work together to achieve the best adjustment and use effect.

Finally, it should be noted that the above are only preferred examples of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still Modify the technical solutions described in the foregoing embodiments, or make equivalent replacements for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. Multi-angle difference absorbing device based on laser radar, including difference absorption laser radar body (1), its characterized in that: an expansion reflection assembly (2) is arranged on the outer side of the differential absorption laser radar body (1), and the expansion reflection assembly (2) comprises a bottom cover (201), a folding cover (202), a plastic film (203), a metal sheet (204), a reflection film (205), a connecting spring (206), a steel wire rope (207), a roller frame (208), a roller (209), a driving motor (210), a winding frame (211), a heat insulation film (212), an air supply fan (213), an exhaust hole (214) and a dust filtering net (215);

the enlarging reflection assembly (2) comprises a bottom cover (201), the bottom cover (201) is sleeved at the bottom end of the differential absorption laser radar body (1), a folding cover (202) is adhered to the edge of the top end of the bottom cover (201), a plastic film (203) is adhered to the edge of the top end of the folding cover (202), a metal sheet (204) is uniformly adhered to the bottom end of the plastic film (203), a reflection film (205) is adhered to the top surface of the plastic film (203), a connecting spring (206) is spot-welded at the middle part of one end of the metal sheet (204), a wire rope (207) is connected to the middle part of the bottom surface of the metal sheet (204), a roller frame (208) is uniformly welded at the middle part of the inner wall of the bottom cover (201), a roller (209) is arranged at the middle part of the roller frame (208) through a rotating shaft, a driving motor (210) is arranged at the middle part of the bottom end of the differential absorption laser radar body (1), a roller (211) is arranged at the output end of the driving motor (210), one end of the wire rope (207) is far away from the metal sheet (204) and is electrically connected with the output end of the driving motor (211) through the roller frame (209);

the bottom surface of the bottom cover (201) is adhered with a heat insulation film (212), both ends of the bottom surface of the bottom cover (201) are embedded with air supply fans (213), exhaust holes (214) are uniformly formed in the middle of the bottom end of the bottom cover (201), and dust filtering nets (215) are arranged at one end of each air supply fan (213) and inside each exhaust hole (214);

the bottom end of the bottom cover (201) is provided with a lubrication oiling component (3).

2. The multi-angle differential absorption device based on the laser radar according to claim 1, wherein one end, far away from the bottom cover (201), of a plurality of roller frames (208) is fixedly installed at the bottom end of the differential absorption laser radar body (1), and the plurality of roller frames (208) are all located at the same round edge.

3. The multi-angle differential absorption device based on the laser radar according to claim 1, wherein folding grooves are formed in the plastic film (203) corresponding to gaps between adjacent metal sheets (204), and the length of each metal sheet (204) is equal to the width of the plastic film (203).

4. The multi-angle differential absorption device based on laser radar according to claim 1, wherein the lubrication oiling assembly (3) comprises an oil groove (301), a sponge sleeve (302), an oil penetration hole (303), a crude cotton sliver (304), a connecting pipe (305), an oil tank (306), a sponge strip (307), an oil plug (308) and a sealing ring (309);

oil drain groove (301) are offered in bobbin (211) bottom, inside wire winding position department of bobbin (211) cup joints sponge sleeve pipe (302), inside wire winding position of bobbin (211) is close to sponge sleeve pipe (302) inner wall department and evenly has offered oil penetration hole (303), inside coarse silver (304) of having placed in oil penetration hole (303), oil drain groove (301) bottom is connected with connecting pipe (305), connecting pipe (305) run through bottom cover (201) and connect oil tank (306), sponge strip (307) have all been placed to oil drain groove (301) and connecting pipe (305) inside, oil tank (306) bottom mid-mounting has oil plug (308), oil tank (306) top is close to bottom cover (201) department and bonds there is sealing ring (309).

5. The multi-angle differential absorption device based on the laser radar according to claim 4, wherein the oil tank (306) is internally filled with lubricating oil, the depth of the oil penetration hole (303) is equal to the length of the cotton sliver (304), and two ends of the cotton sliver (304) are respectively contacted with the sponge sleeve (302) and the sponge strip (307).

6. The multi-angle differential absorption device based on the laser radar according to claim 1, wherein an adjusting component (4) is installed at the bottom end of the differential absorption laser radar body (1), and the adjusting component (4) comprises a main hydraulic rod (401), a secondary hydraulic rod (402), a turntable (403), a base (404), a sealing rubber ring (405), an adjusting hydraulic rod (406) and a level bar (407);

the main hydraulic rod (401) top is rotated and is installed in end cover (201) bottom middle part one side, vice hydraulic rod (402) are installed to end cover (201) bottom middle part opposite side, main hydraulic rod (401) and vice hydraulic rod (402) are all installed on revolving stage (403) top, base (404) have been cup jointed to revolving stage (403) outside bottom, base (404) and revolving stage (403) junction bonding have sealed rubber ring (405), inside bottom evenly distributed of base (404) has regulation hydraulic rod (406), regulation hydraulic rod (406) top is all connected in revolving stage (403) bottom through the universal joint, evenly inlay on revolving stage (403) top edge has horizon rule (407).

7. The multi-angle differential absorption device based on the laser radar according to claim 6, wherein the inner wall and the outer wall of the sealing rubber ring (405) are respectively adhered to the bottom edge of the turntable (403) and the top end of the base (404), and the thickness of the middle part of the longitudinal section of the sealing rubber ring (405) is larger than the thickness of two sides.

8. The multi-angle differential absorption device based on the laser radar according to claim 6, wherein a positioning support assembly (5) is sleeved at the bottom end of the base (404), and the positioning support assembly (5) comprises a support ring (501), a storage groove (502), a diamond groove (503), a quadrangular prism (504), an adjusting screw (505), a bottom plate (506), a sliding groove (507), a support tube (508) and a support spring (509);

support ring (501) cup joints in base (404) bottom edge, accomodate groove (502) have evenly been seted up to support ring (501) bottom, accomodate groove (503) have been seted up at groove (502) top surface middle part, diamond groove (503) inside slidable mounting has quadrangular (504), adjusting screw (505) are installed in quadrangular (504) top rotation, adjusting screw (505) are through screw thread through connection support ring (501), quadrangular (504) bottom corresponds to accomodate groove (502) inside position department welding has bottom plate (506), sliding tray (507) have evenly been seted up to bottom plate (506) bottom surface, sliding tray (507) inside slidable mounting has support stay tube (508), inside bottom welding support spring (509) of stay tube (508) are connected in the inside top of sliding tray (507).

9. The multi-angle differential absorption device based on lidar according to claim 8, wherein the receiving groove (502) engages with a bottom plate (506), and the sliding groove (507) engages with a support tube (508).

10. The multi-angle differential absorption device based on the laser radar according to claim 8, wherein the bottom ends of a plurality of supporting pipes (508) are sleeved with replacement cushion blocks.