A laser radar

Abstract

The present application discloses a laser radar, including: a laser emitting component, a laser receiving component and a rotatable reflector, wherein the rotatable reflector includes a first reflector and a second reflector. The optical axes of the laser emitting component and the laser receiving component are arranged relatively, the rotatable reflector is located between the laser emitting component and the laser receiving component, the first reflector is inclined to the optical axis of the laser emitting component, and is used to reflect the emission light beam emitted by the laser emitting component, the second reflector is inclined to the optical axis of the laser receiving component, and is used to reflect the reflected light beam reflected by the laser emission to the outside to the laser receiving component, and the laser emitting component and the laser receiving component are installed independently of the rotatable reflector. In the above manner, the laser emitting component, the laser receiving component and the rotatable reflector of the laser radar of the present application can be installed independently, without the relationship of mutual restriction and mutual interference, which reduces the difficulty of assembling and adjusting the laser radar.

Description

Technical Field

[0001] The present application relates to the field of surveying and mapping technology, and in particular to a laser radar. Background Art

[0002] Laser radar detects targets by using the transmitting light beam emitted by the laser transmitting component of the laser radar to reflect off a rotatable reflector. The transmitting light beam is scattered on the target, and a portion of the reflected light beam is reflected off the rotatable reflector and then received by the laser receiving component of the laser radar. The distance from the laser radar to the target can be calculated based on the laser ranging principle.

[0003] After long-term research, the inventor of the present application discovered that the existing laser radar rotatable reflector is installed as a whole with the laser emitting component and the laser receiving component, which makes installation and adjustment difficult. Summary of the invention

[0004] The main technical problem solved by the present application is to provide a laser radar whose rotatable reflector can be installed independently from the laser emitting component and the laser receiving component, thereby reducing the difficulty of assembling and adjusting the laser radar.

[0005] In order to solve the above technical problems, the technical solution adopted in this application is: to provide a laser radar, which includes: a laser emitting component; a laser receiving component; a rotatable reflector, including a first reflector and a second reflector; wherein the optical axes of the laser emitting component and the laser receiving component are relatively arranged, and the rotatable reflector is located between the laser emitting component and the laser receiving component; the first reflector is inclined to the optical axis of the laser emitting component, and is used to reflect the emission light beam emitted by the laser emitting component, and the second reflector is inclined to the optical axis of the laser receiving component, and is used to reflect the reflected light beam reflected by the laser emission to the outside to the laser receiving component; the laser emitting component and the laser receiving component are installed independently of the rotatable reflector.

[0006] The beneficial effect of the present application is as follows: different from the prior art, the optical axis of the laser emitting component of the laser radar provided in the present application is arranged relative to the optical axis of the laser receiving component, and the rotatable reflector is located between the laser emitting component and the laser receiving component, and the laser emitting component and the laser receiving component are installed independently of the rotatable reflector. Therefore, during the installation and adjustment of the laser radar, the three can be installed independently without any mutual restriction or interference, thereby reducing the difficulty of installation and adjustment of the laser radar. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in this application, the following briefly introduces the drawings required in the description of the embodiments. Obviously, the drawings described below are only some embodiments of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0008] Figure 1 is a cross-sectional schematic diagram of an embodiment of the laser radar of the present application;

[0009] Figure 2 It is a structural schematic diagram of an implementation method of the laser radar of the present application;

[0010] Figure 3 yes Figure 2 A schematic structural diagram of an implementation method of a middle base;

[0011] Figure 4 yes Figure 2 A schematic structural diagram of an implementation scheme of a middle driving member;

[0012] Figure 5 yes Figure 2 A structural schematic diagram of an implementation method of a middle balancing member;

[0013] Figure 6 yes Figure 2 A schematic structural diagram of an embodiment of a middle rotating member;

[0014] Figure 7 yes Figure 2 A schematic structural diagram of an embodiment of the first isolation plate and the second isolation plate;

[0015] Figure 8 yes Figure 2 A schematic diagram of the structure of a middle code disk and a counter in one embodiment;

[0016] Fig. 9 It is an exploded schematic diagram of an implementation method of the laser radar of the present application. DETAILED DESCRIPTION

[0017] The following is a clear and complete description of the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0018] See also Figure 1 , Figure 1This is a schematic diagram of the structure of an embodiment of the laser radar of the present application. The laser radar 1 includes: a laser emitting component 10, a laser receiving component 20, and a rotatable reflector 30, and the rotatable reflector 30 includes a first reflector 301 and a second reflector 302. Among them, in an implementation scenario, the first reflector 301 and the second reflector 302 are plane reflectors, and the size of the first reflector 301 is slightly larger than the emission light beam emitted by the laser emitting component 10, thereby reducing the size of the first reflector 301 as much as possible, and the size of the second reflector 302 is slightly larger than the reflected light beam emitted by the emission light beam to the outside world, thereby reducing the size of the second reflector 302 as much as possible.

[0019] Among them, the optical axes of the laser emitting component 10 and the laser receiving component 20 (shown by the dotted line in the figure) are arranged relatively, and the rotatable reflector 30 is located between the laser emitting component 10 and the laser receiving component 20; the first reflector 301 is inclined to the optical axis of the laser emitting component 10, and is used to reflect the emission light beam emitted by the laser emitting component 10. In one implementation scenario, the angle between the first reflector 301 and the optical axis of the laser emitting component 10 is 44-46 degrees, such as 44 degrees, 45 degrees, and 46 degrees; the second reflector 302 is inclined to the optical axis of the laser receiving component 20, and in one implementation scenario, the angle between the second reflector 302 and the optical axis of the laser receiving component 20 is 44-46 degrees, such as 44 degrees, 45 degrees, and 46 degrees; it is used to reflect the reflected light beam reflected by the laser emission to the outside to the laser receiving component 20. In one implementation scenario, the first reflector 301 and the second reflector 302 are integrally formed, and in other implementation scenarios, the first reflector 301 and the second reflector 302 can also be separately formed. The laser emitting assembly 10 and the laser receiving assembly 20 are installed independently of the rotatable reflector 30 .

[0020] Through the above-mentioned implementation mode, the optical axis of the laser emitting component 10 of the laser radar 1 is arranged relative to the optical axis of the laser receiving component 20, and the rotatable reflector 30 is located between the laser emitting component 10 and the laser receiving component 20. The laser emitting component 10 and the laser receiving component 20 are installed independently of the rotatable reflector 30. Therefore, during the installation and adjustment of the laser radar 1, the three can be installed independently without any mutual restriction or mutual interference, thereby reducing the difficulty of installation and adjustment of the laser radar 1.

[0021] Please refer to Figure 1 and Figure 2The laser radar 1 also includes a base 40 for mounting a laser emitting assembly 10, a laser receiving assembly 20, and a rotatable reflector 30. The optical axes of the laser emitting assembly 10 and the laser receiving assembly 20, and the rotation axis of the rotatable reflector 30 are located on the same axis (shown by the dotted line in the figure). The laser radar 1 of the present application also includes a driving member 50, a balancing member 60, a rotating member 70, a first isolation plate 80, and a second isolation plate 90 (the second isolation plate 90 is shown in conjunction with Figure 1 ), code disk 1a, counter 1b. Specifically:

[0022] See also Figure 3 , Figure 3 yes Figure 2 A schematic diagram of the structure of an embodiment of the base 40. The base 40 comprises a first mounting seat 401 and a second mounting seat 402 which are arranged in parallel and relatively fixed positions. In one implementation scenario, the first mounting seat 401 and the second mounting seat 402 are made of metal, such as aluminum alloy, steel, etc. In other implementation scenarios, the first mounting seat 401 and the second mounting seat 402 are made of plastic, such as polyethylene, polyvinyl chloride, etc. The first mounting seat 401 includes a first surface 4011 and a second surface 4012 which are arranged opposite to each other. The first mounting seat 401 also includes a first hole 4013 which passes through the first surface 4011 and the second surface 4012. In one implementation scenario, the size of the first hole 4013 is slightly larger than the emission light beam emitted by the laser emission assembly 10. The first hole 4013 can be circular, square, etc. The first surface 4011 is used to fix the laser emitting assembly 10 so that the emission beam emitted by the laser emitting assembly 10 passes through the first hole 4013. The second surface 4012 is used to fix the rotatable reflector 30 so that the emission beam passing through the first hole 4013 is reflected by the first reflector 301. The second mounting seat 402 includes a third surface 4021 and a fourth surface 4022 that are arranged opposite to each other. The second mounting seat 402 also includes a second hole 4023 that penetrates the third surface 4021 and the fourth surface 4022. In an implementation scenario, the size of the second hole 4023 is slightly larger than the reflected beam received by the laser receiving assembly 20. The second hole 4023 can be circular, square, etc. The fourth surface 4022 is used to fix the laser receiving assembly 20 so that the reflected beam passes through the second hole 4023 and is received by the laser receiving assembly 20. The second surface 4012 and the third surface 4021 are arranged relatively close to each other.

[0023] The base 40 also includes a support member 403, which is fixedly connected to the second surface 4012 of the first mounting seat 401 and the third surface 4021 of the second mounting seat 402. In one implementation scenario, the support member 403 is fixedly connected to the same side of the first mounting seat 401 and the second mounting seat 402. In another implementation scenario, the support member 403 is fixedly connected to the middle of the first mounting seat 401 and the second mounting seat 402, so that the base 40 is in an "I" shape. Among them, in one implementation scenario, the support member 403 is metal, such as aluminum alloy, steel, etc., and in other implementation scenarios, the support member 403 is plastic, such as polyethylene, polyvinyl chloride, etc. The first mounting seat 401, the second mounting seat 402, and the support member 403 can be formed into the base 40 by integral molding, or they can be fixedly connected to each other by screws, mortise and tenon joints, etc.

[0024] Please continue reading Figure 3 A third hole 4014 is provided around the first hole 4013 and penetrates the first surface 4011 of the first mounting seat 401, and is used to fix the laser emitting assembly 10. In one implementation scenario, the number of the third holes 4014 is at least 3, such as 3, 4, 5, etc., to firmly fix the laser emitting assembly 10. In one embodiment, the inner circumference of the third hole 4014 is provided with a thread.

[0025] The fourth surface 4022 penetrating the second mounting seat 402 is provided with a fourth hole 4024 surrounding the second hole 4023, which is used to be fixed with the laser receiving assembly 20. In one implementation scenario, the number of the fourth holes 4024 is at least 3, such as 3, 4, 5, etc., to firmly fix the laser receiving assembly 20. In one implementation scenario, the inner circumference of the fourth hole 4024 is provided with a thread.

[0026] See also Figure 4 The driving member 50 includes a first end 501 and a second end 502 that are arranged opposite to each other. A fifth hole 503 is provided through the first end 501 and the second end 502 of the driving member 50. The center of the fifth hole 503 (indicated by the arrow) is located on the axis (indicated by the dotted line in the figure) for passing the emission light beam. In an implementation scenario, the size of the fifth hole 503 is slightly larger than the emission light beam emitted by the laser emission assembly 10.

[0027] The first end portion 501 is provided with a sixth hole 504 surrounding the fifth hole 503, and the first end portion 501 is fixedly connected to the second surface 4012 of the first mounting seat 401 through a fixing member matching the sixth hole 504. In an implementation scenario, the number of the sixth holes 504 is at least 3, such as 3, 4, 5, etc., so that the driving member 50 is firmly mounted on the first mounting seat 401.

[0028] The second end 502 rotates around the axis under power drive. In one implementation scenario, the second end 502 is provided with a fixing position around the fifth hole 503 so that the balance member 60 is firmly fixed to the second end 502 of the driving member 50. Among them, the shape of the fixing position can be set to a hole with a screw inside. The fixing position can also be set to a buckle or other shape, which is not limited in this embodiment. In one implementation scenario, in order to rotate the driving member 50, the laser radar 1 of the present application can further include a built-in power source, such as a built-in battery.

[0029] See also Figure 5 , Figure 5 yes Figure 2 A schematic diagram of the structure of an embodiment of a balance member 60 in the embodiment. The balance member 60 includes a third end 601 and a fourth end 602 that are fixedly connected. The third end 601 is arranged around the driving member 50, and the third end 601 is provided with at least one seventh hole 6011 for embedding a counterweight to maintain the center of gravity balance of the laser radar 1. The number of the seventh holes 6011 can be 1, 2, 3, 4, etc. In one implementation scenario, the seventh holes 6011 are evenly arranged on the third end 601. The size of the seventh hole 6011 can be set according to the size of the counterweight. The third end 601 is made of a metal material that can be magnetically adsorbed, such as iron, cobalt, nickel, etc., and the counterweight is correspondingly made of a magnetic material. In another implementation scenario, the inner circumference of the seventh hole 6011 is provided with a thread, and the outer circumference of the counterweight is provided with a thread matching it, and the counterweight and the seventh hole 6011 are fixedly connected by threads that match each other. The fourth end 602 includes a fifth surface 6021 and a sixth surface 6022 that are arranged opposite to each other. The fifth surface 6021 of the fourth end 602 is fixedly connected to the second end 502 of the driver 50. An eighth hole 6023 is provided through the fifth surface 6021 and the sixth surface 6022. The center of the eighth hole 6023 (indicated by the solid arrow) is located on the axis (shown by the dotted line in the figure) for passing the emission light beam. In an implementation scenario, the size of the eighth hole 6023 is slightly larger than the size of the emission light beam. In an implementation scenario, a fixing position for fixed connection with the driver 50 is also provided around the eighth hole 6023 through the fourth end 602. The fixing position of the fourth end 602 of the balance member 60 is set to match the fixing position of the second end 502 of the driver 50. For example, the shape of the fixing position can be set to a hole with a screw inside. The fixing position can also be set to a buckle or other shape, which is not limited in this embodiment.

[0030] See also Figure 6 , Figure 6 yes Figure 2A schematic diagram of the structure of an embodiment of the rotating member 70. The rotating member 70 is fixedly connected to the sixth surface 6022 of the fourth end 602 of the balancing member 60. In an implementation scenario, the end of the rotating member 70 fixedly connected to the sixth surface 6022 of the fourth end 602 of the balancing member 60 is provided with a fixed position (indicated by the solid arrow in the figure), and correspondingly, the sixth surface 6022 of the fourth end 602 of the balancing member 60 is provided with a matching fixed position, for example, a threaded hole is provided on the inner circumference, and at this time, the rotating member 70 is fixedly connected to the balancing member 60 through a screw matching the hole. The rotating member 70 is used to fix the rotatable reflector 30 so that the rotatable reflector 30 rotates around the axis (shown by the dotted line in the figure) driven by the driving member 50.

[0031] See also Figure 7 , Figure 7 yes Figure 2 Schematic diagram of the structure of an embodiment of the first isolation plate 80 and the second isolation plate 90, the first isolation plate 80 is fixedly connected to the support member 403. In an implementation scenario, a fixing position, such as a hole, is provided at the position where the first isolation plate 80 is fixedly connected to the support member 403, and a screw hole matching the hole is provided at the position where the support member 403 is fixedly connected to the first isolation plate 80, and the first isolation plate 80 is fixedly connected to the support member 403 by a screw matching therewith. The first isolation plate 80 is provided with a ninth hole 801 matching with the rotating member 70, and one end of the rotating member 70 abutting against the ninth hole 801 (see Figure 6 The center of the ninth hole 801 (indicated by the solid arrow in the figure) is matched, and the center of the ninth hole 801 (indicated by the solid arrow in the figure) is located on the axis (the dotted line in the figure). The first isolation plate 80 is used to isolate the emission light beam from entering the laser receiving component 20. The second isolation plate 90 is fixedly connected to the rotating member 70. In an implementation scenario, a screw hole is provided on the second isolation plate 90, and the second isolation plate 90 is fixedly connected to the rotating member 70 through the screw hole and the matching screw rod. The second isolation plate 90 is used to isolate the reflected light beam from entering the laser emitting component 10.

[0032] See also Figure 8 , Figure 8 yes Figure 2A schematic diagram of the structure of an embodiment of the code disk 1a and the counter 1b. The code disk 1a is arranged around the driving member 50 and fixedly connected to the third end 601 of the balancing member 60. The edge of the code disk 1a is provided with first counting holes 1a1 arranged continuously at equal intervals of a first preset arc θ, and the edge of the code disk 1a is also provided with a second counting hole 1a2. Among them, in one implementation scenario, the first preset arc θ is π / 180rad, that is, 1°. The arc of the arc connecting the first counting holes 1a1 is 3π / 2rad, that is, 270°. In other implementation scenarios, the first preset arc θ can also be set to other values, such as π / 360rad, π / 270rad, etc., in which case the number of the first counting holes 1a1 is 270. The arc of the arc connecting the first counting holes 1a1 can also be other values, for example: 7π / 4rad, that is, 315°. The second counting holes 1a2 are arranged at intervals from the first counting holes 1a1 that are arranged continuously. In one implementation scenario, the number of the second counting holes 1a2 is much less than the number of the first counting holes 1a1, such as 1, 2, 3, 4, etc. The second counting holes 1a2 are arranged at equal intervals at a second preset arc, and the second preset arc can be set to π / 180 rad, π / 90 rad, π / 360 rad, etc. In other implementation scenarios, the second preset arc can also be set at unequal intervals.

[0033] The counter 1b is close to the edge of the code disk 1a and is fixedly connected to the support 403. The counter 1b includes a fifth end 1b1 and a sixth end 1b2 spaced apart by a first predetermined distance D1. The fifth end 1b1 and the sixth end 1b2 are located on both sides of the code disk 1a, respectively. The fifth end 1b1 is used to transmit a counting signal, and the sixth end 1b2 is used to receive a counting signal. In one implementation scenario, the counting signal is a pulse signal.

[0034] When the code disk 1a rotates, the rotation angle of the rotatable reflector 30 is determined by the cooperation of the counter 1b and the first counting hole 1a1 on the edge of the code disk 1a, and the number of rotations of the rotatable reflector 30 is determined by the cooperation of the counter 1b and the second counting hole 1a2 on the edge of the code disk 1a. In one implementation scenario, in order to let the user know the rotation angle and the number of rotations, the laser radar 1 of the present application may further include a circuit board, which is electrically connected to the counter or connected to an electrical signal. The circuit board may also provide an external interface for exporting data such as the rotation angle and the number of rotations, or accurately calculating and controlling the rotation angle and the number of rotations of the rotatable reflector 30 through the circuit board. In another implementation scenario, in order to intuitively display the rotation angle and the number of rotations of the rotatable reflector 30, the laser radar 1 of the present application may further include a display screen for displaying the current rotation angle and the number of rotations in real time.

[0035] Please combine Figure 1 and Figure 2 , see Fig. 9 , Fig. 9 The exploded schematic diagram of an embodiment of the laser radar 1 of the present application is described in detail below. The embodiment of the assembly and adjustment of each component of the laser radar 1 of the present application is as follows: align the fifth hole 503 of the first end 501 of the driving member 50 with the first hole 4013 of the first mounting seat 401 of the base 40, pass the fixing member indicated by the arrow in the figure through the sixth hole 504 of the driving member 50 and the third hole 4014 of the first mounting seat 401, and then fix the driving member 50 to the second surface 4012 of the first mounting seat 401 of the base 40. Fix the code disk 1a to the third end 601 of the balancing member 60, fix the whole composed of the code disk 1a and the balancing member 60 to the second end 502 of the driving member 50, and set the code disk 1a between the fifth end 1b1 and the sixth end 1b2 of the counter 1b, fix the rotating member 70 to the fourth end 602 of the balancing member 60, and fix the rotatable reflector 30 to the rotating member 70. The specific installation methods include but are not limited to: dispensing, threading, buckle, etc. At this time, the rotatable reflector 30 can rotate around the axis (as shown by the dotted line in the figure). The ninth hole 801 of the first isolation plate 80 passes through part of the rotating member 70 and abuts against the rotating member 70, and is installed to the support member 403 of the base 40, and the second isolation plate 90 is fixedly connected to the rotating member 70. A part of the laser emitting assembly 10 passes through the first hole 4013 of the first mounting seat 401 of the base 40, and is fixedly connected to the first surface 4011 of the first mounting seat 401 of the base 40. The laser receiving assembly 20 is fixedly connected to the fourth surface 4022 of the second mounting seat 402 of the base 40 through the fourth hole 4024 of the second mounting seat 402 of the base 40.

[0036] Through the above method, the rotatable reflector 30, the laser emitting assembly 10, and the laser receiving assembly 20 can be installed independently without affecting each other, thereby reducing the difficulty of installation and adjustment.

[0037] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A laser radar, characterized in that: The laser radar comprises: Laser emission components; Laser receiving assembly; A rotatable reflector, comprising a first reflector and a second reflector; wherein the optical axes of the laser emitting assembly and the laser receiving assembly are arranged relative to each other, the rotatable reflector is located between the laser emitting assembly and the laser receiving assembly, the first reflector is inclined to the optical axis of the laser emitting assembly, and is used to reflect the emission light beam emitted by the laser emitting assembly, the second reflector is inclined to the optical axis of the laser receiving assembly, and is used to reflect the reflected light beam reflected by the laser emission to the outside to the laser receiving assembly, and the laser emitting assembly and the laser receiving assembly are installed independently of the rotatable reflector, and the first reflector and the second reflector are integrally formed or separately formed; A base, used for mounting the laser emitting assembly, the laser receiving assembly, and the rotatable reflector, wherein the optical axes of the laser emitting assembly, the laser receiving assembly, and the rotation axis of the rotatable reflector are located on the same axis, and the base comprises a first mounting seat and a second mounting seat which are arranged in parallel and relatively fixed positions; Among them, the first mounting seat includes a first surface and a second surface arranged in opposite directions, the first mounting seat also includes a first hole penetrating the first surface and the second surface, the first surface is used to fix the connection with the laser emitting component, so that the emission light beam emitted by the laser emitting component passes through the first hole, the second surface is used to fix the connection with the rotatable reflector, so that the emission light beam passing through the first hole is reflected by the first reflector, the second mounting seat includes a third surface and a fourth surface arranged in opposite directions, the second mounting seat also includes a second hole penetrating the third surface and the fourth surface, the fourth surface is used to fix the connection with the laser receiving component, so that the reflected light beam passes through the second hole and is received by the laser receiving component, and the second surface and the third surface are arranged relatively close to each other.

2. The laser radar according to claim 1, characterized in that: The base also includes: A support member is fixedly connected to the second surface of the first mounting seat and the third surface of the second mounting seat.

3. The laser radar according to claim 2, characterized in that: A third hole is provided around the first hole and passes through the first surface of the first mounting seat, and is used for fixing with the laser emitting assembly; And / or, a fourth hole surrounding the second hole is provided on the fourth surface penetrating the second mounting seat for fixing with the laser receiving assembly.

4. The laser radar according to claim 3, characterized in that: The laser radar also includes: A driving member, comprising a first end and a second end disposed opposite to each other, a fifth hole being provided through the first end and the second end of the driving member, the center of the fifth hole being located on the axis and being used to pass the emission light beam; The first end portion is provided with a sixth hole surrounding the fifth hole, and the first end portion is fixedly connected to the second surface of the first mounting seat through a fixing member matching the sixth hole; The second end portion is driven by power to rotate around the axis.

5. The laser radar according to claim 4, characterized in that: The laser radar also includes: A balancing member, comprising a third end portion and a fourth end portion that are fixedly connected; The third end is arranged around the driving member, and the third end is provided with at least one seventh hole for embedding a counterweight block to maintain the center of gravity balance of the laser radar; The fourth end includes a fifth surface and a sixth surface arranged opposite to each other. The fifth surface of the fourth end is fixedly connected to the second end of the driving member. An eighth hole is provided through the fifth surface and the sixth surface. The center of the eighth hole is located on the axis and is used to pass the emitted light beam.

6. The laser radar according to claim 5, characterized in that: The laser radar further comprises: A rotating member is fixedly connected to the sixth surface of the fourth end of the balancing member, and the rotating member is used to be fixedly connected to the rotatable reflector so that the rotatable reflector rotates around the axis driven by the driving member.

7. The laser radar according to claim 6, characterized in that: The laser radar further comprises: a first isolation plate, fixedly connected to the support member, the first isolation plate being provided with a ninth hole matching the rotating member, the center of the ninth hole being located on the axis, and the first isolation plate being used to isolate the emission light beam from entering the laser receiving assembly; A second isolation plate is fixedly connected to the rotating member, and the second isolation plate is used to isolate the reflected light beam from entering the laser emitting assembly.

8. The laser radar according to claim 5, characterized in that: The laser radar also includes: A code disk, which is arranged around the driving member and fixedly connected to the third end of the balancing member, wherein the edge of the code disk is provided with first counting holes which are arranged in a continuous manner and are arranged at equal intervals with a first preset arc, and the edge of the code disk is also provided with second counting holes which are arranged in a continuous manner and are spaced from the first counting holes; A counter, close to the edge of the code disk and fixedly connected to the support, comprises a fifth end and a sixth end arranged at a first predetermined distance, the fifth end and the sixth end are respectively located on both sides of the code disk, the fifth end is used to emit a counting signal, and the sixth end is used to receive the counting signal; When the code disk rotates, the rotation angle of the rotatable reflector is determined by the cooperation between the counter and the first counting hole on the edge of the code disk, and the number of rotations of the rotatable reflector is determined by the cooperation between the counter and the second counting hole on the edge of the code disk.

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