A lidar receiving device

Abstract

This utility model discloses a lidar receiving device, relating to the field of lidar technology. It includes a receiving device body, an optical lens group, and a photodetector. A mounting shell is fixedly installed at one end of the receiving device body, and a laser signal input port is formed on the surface of the mounting shell. A photodetector is detachably installed at one end inside the receiving device body. This utility model utilizes a cooling fan, a heat sink, and heat-conducting plates in cooperation. The cooling fan and heat sink work closely together to achieve efficient heat dissipation. The heat sink is in direct contact with the signal processing module. Thanks to the excellent thermal conductivity of the aluminum alloy, it quickly conducts the heat generated by the module. The heat-conducting plates on the heat sink further enhance the heat transfer efficiency. Simultaneously, the cooling fan continuously operates to accelerate airflow, promptly removing heat from the surface of the heat-conducting plates, ensuring the device remains stable during long-term operation and effectively preventing performance degradation due to heat accumulation.

Description

Technical Field

[0001] This utility model relates to the field of lidar technology, specifically to a lidar receiving device. Background Technology

[0002] LiDAR (LiDAR) detects information such as distance, speed, and angle of a target object by emitting a laser beam and receiving the laser signal reflected back from the target object. In a LiDAR system, the receiving device is a crucial component, and its performance directly affects the detection accuracy and reliability of the LiDAR.

[0003] The existing receiver's structural layout is not reasonable, which is not conducive to internal heat dissipation and will lead to a decline in device performance after long-term operation. Utility Model Content

[0004] The purpose of this invention is to provide a lidar receiving device to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A lidar receiver includes a receiver body, an optical lens group, and a photodetector. A mounting shell is fixedly installed at one end of the receiver body, and a laser signal inlet is provided on the surface of the mounting shell. A photodetector is detachably installed at one end inside the receiver body. The optical lens group is disposed between the laser signal inlet and the photodetector, and the optical lens group consists of two lenses with different focal lengths.

[0007] An assembly frame is detachably installed on the right end inside the main body of the receiving device. A heat dissipation mechanism is fixedly installed on the inner side of the assembly frame. The heat dissipation mechanism includes a heat dissipation plate. A heat-conducting sheet is fixedly connected to the side of the heat dissipation plate. A connecting frame is detachably connected to the other side of the heat-conducting sheet.

[0008] One end of the assembly frame is provided with a connecting slide groove, and a snap-fit ​​mechanism is provided inside the connecting slide groove. The snap-fit ​​mechanism includes a movable block, and a telescopic spring is fixedly connected to the bottom of the movable block. The bottom of the telescopic spring is fixedly connected to the inner wall of the connecting slide groove.

[0009] A further improvement of this utility model is that: a push plate is movably sleeved at one end of the connecting frame away from the heat-conducting sheet, and a telescopic column is movably connected at the other end of the push plate, with the other end of the telescopic column fixedly connected to the inner side of the assembly frame.

[0010] By adopting the above technical solution, the telescopic pushing function is achieved through the cooperation of the push plate, telescopic column and assembly frame.

[0011] A further improvement of this utility model is that an mounting plate is fixedly installed on the outer side of the heat sink, and the two ends of the mounting plate are movably connected to the side of the connecting frame.

[0012] By adopting the above technical solution, the installation function is achieved through the cooperation of the mounting plate and the connecting frame.

[0013] A further improvement of this utility model is that: both the mounting plate and the connecting frame have connecting holes on their surfaces, and the connecting holes are internally threaded with fixing bolts.

[0014] By adopting the above technical solution, the function of threaded connection installation is achieved through the cooperation of connecting holes and fixing bolts.

[0015] A further improvement of this utility model is that a fixing plate is fixedly installed on the inner wall of the assembly frame, and a cooling fan is fixedly installed inside the fixing plate.

[0016] By adopting the above technical solution, the mounting plate and the cooling fan work together to accelerate airflow and quickly dissipate the internal heat.

[0017] A further improvement of this utility model is that: a signal processing module is movably installed inside the assembly frame; an amplifier is fixedly installed at one end of the signal processing module; a signal processor is fixedly installed at the other end of the signal processing module; and a bandpass filter is fixedly installed between the signal processor and the amplifier.

[0018] By employing the above technical solution, an amplifier, a bandpass filter, and a signal processor work together. The amplifier is used to initially amplify the weak electrical signal output by the photodetector. The bandpass filter then effectively filters out noise signals outside a specific frequency range. Finally, the signal processor processes the amplified and filtered signal to obtain relevant information about the target object.

[0019] A further improvement of this utility model is that: assembly plates are fixedly installed on both sides of the assembly frame, and the outer side of the assembly plate is movably installed inside the connecting slide groove.

[0020] By adopting the above technical solution, the function of movable connection is achieved through the cooperation of the assembly plate and the connecting slide.

[0021] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0022] 1. This utility model provides a lidar receiving device that utilizes a cooling fan, a heat sink, and heat-conducting plates in conjunction with each other. The cooling fan and heat sink work closely together to achieve efficient heat dissipation. The heat sink directly contacts the signal processing module, and thanks to the excellent thermal conductivity of the aluminum alloy material, it quickly conducts the heat generated by the module. The heat-conducting plates mounted on it further enhance the heat transfer efficiency. Simultaneously, the cooling fan continuously operates to accelerate airflow, promptly removing heat from the surface of the heat-conducting plates, ensuring the device remains stable during long-term operation and effectively preventing performance degradation due to heat accumulation.

[0023] 2. This utility model provides a laser radar receiving device. Through the cooperation of a connecting slide, a telescopic spring, and a movable block, when the signal processing module slides into the installation position along the connecting slide, the guide slopes on both sides of the module push the movable block of the elastic clamping component to retract inward, compressing the built-in telescopic spring. After the module is fully in place, the telescopic spring releases its deformation energy, driving the movable block to reset and press tightly against the side of the module, forming a stable elastic clamping force. This enables the module to be quickly loaded and unloaded, and the continuous pre-tightening force ensures reliable fixation of the module in a vibration environment, effectively avoiding electrical connection failures caused by loosening and improving the overall stability of the device. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the main structure of the receiving device of this utility model;

[0026] Figure 3 This is a schematic diagram of the assembly frame structure of this utility model;

[0027] Figure 4 This is a schematic diagram of the heat sink structure of this utility model;

[0028] Figure 5 This is a schematic diagram of the connecting groove structure of this utility model.

[0029] In the diagram: 1. Receiver body; 2. Mounting housing; 3. Laser signal inlet; 4. Optical lens group; 5. Photodetector; 6. Signal processing module; 7. Assembly frame; 61. Amplifier; 62. Signal processor; 72. Cooling fan; 73. Connecting slide; 74. Heat sink; 731. Telescopic spring; 732. Movable block; 741. Mounting plate; 742. Connecting frame; 743. Heat-conducting sheet; 744. Push plate; 745. Telescopic column. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to embodiments:

[0031] Example 1

[0032] like Figure 1-5 As shown, this utility model provides a lidar receiver device, including a receiver body 1, an optical lens group 4, and a photodetector 5. A mounting housing 2 is fixedly installed at one end of the receiver body 1, and a laser signal inlet 3 is provided on the surface of the mounting housing 2. A photodetector 5 is detachably installed at one end inside the receiver body 1. The optical lens group 4 is disposed between the laser signal inlet 3 and the photodetector 5, and the optical lens group 4 consists of two lenses with different focal lengths. A signal processing module 6 is movably installed inside the mounting frame 7. The signal processing module 6 contains a... An amplifier 61 is fixedly mounted at one end of the receiver unit 6. A signal processor 62 is fixedly mounted at the other end of the signal processing module 6. A bandpass filter is fixedly mounted between the signal processor 62 and the amplifier 61. An assembly frame 7 is detachably mounted on the right end of the receiver unit 1. A heat dissipation mechanism is fixedly mounted on the inner side of the assembly frame 7. The heat dissipation mechanism includes a heat sink 74. A heat conduction plate 743 is fixedly connected to the side of the heat sink 743. A connecting frame 742 is detachably connected to the other side of the heat conduction plate 743. A push plate 745 is movably sleeved at the end of the connecting frame 742 away from the heat conduction plate 743. The other end of the push plate 745 is movably connected to a telescopic column 745, and the other end of the telescopic column 745 is fixedly connected to the inner side of the assembly frame 7. A fixing plate is fixedly installed on the inner wall of the assembly frame 7, and a cooling fan 72 is fixedly installed inside the fixing plate. When the lidar is working, the laser signal reflected back from the target object enters the device through the laser signal inlet 3, is focused by the optical lens group 4, and then shines on the photodetector 5. The photodetector 5 converts the light signal into an electrical signal, which is then amplified by the preamplifier 61 and filtered by the bandpass filter before being transmitted to the signal processing unit. The processor 62 processes the data to obtain information such as the distance, speed, and angle of the target object. At the same time, the cooling fan 72 and the heat sink 74 work together, and with the telescopic column 745 moving, the heat sink 74 is pushed into close contact with the signal processing module 6 for heat conduction. The heat conduction of the heat conduction sheet 743 is also achieved. The heat conduction sheet 743 is made of aluminum alloy and conducts heat quickly, so the heat is dissipated again. The cooling fan 72 accelerates the airflow to quickly dissipate the heat on the heat conduction sheet 743, ensuring the stability of the device during long-term operation and timely dissipating the heat generated during operation.

[0033] Example 2

[0034] like Figure 1-5As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, an mounting plate 741 is fixedly installed on the outer side of the heat sink 74, and both ends of the mounting plate 741 are movably connected to the side of the connecting frame 742. Both the mounting plate 741 and the connecting frame 742 have connecting holes on their surfaces, and fixing bolts are threaded into the connecting holes. The mounting plate 741 and the connecting frame 742 are threadedly installed through the fixing bolts, which facilitates the quick installation and disassembly of the heat dissipation mechanism and is conducive to convenient disassembly for equipment maintenance.

[0035] Example 3

[0036] like Figure 1-5 As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, one end of the assembly frame 7 is provided with a connecting groove 73, and the interior of the connecting groove 73 is provided with a snap-fit ​​mechanism. The snap-fit ​​mechanism includes a movable block 732, the bottom of the movable block 732 is fixedly connected to a telescopic spring 731, the bottom of the telescopic spring 731 is fixedly connected to the inner wall of the connecting groove 73, and assembly plates are fixedly installed on both sides of the assembly frame 7. The outer side of the assembly plate is movably installed inside the connecting groove 73. The signal processing module 6 slides into the connecting groove 73 through the assembly plate, pushing the movable blocks 732 on both sides to squeeze the telescopic spring 731. The elasticity of the telescopic spring 731 is used to spring back and clamp the assembly plate, thereby achieving the function of tightly pressing and fixing the signal processing module 6, which facilitates stable operation of the equipment.

[0037] The working principle of this lidar receiver will be explained in detail below.

[0038] like Figure 1-5 As shown, when the lidar is working, the laser signal reflected from the target object enters the device through the laser signal inlet 3, is focused by the optical lens group 4, and then shines onto the photodetector 5. The photodetector 5 converts the optical signal into an electrical signal, which is then amplified by the preamplifier 61, filtered by the bandpass filter, and transmitted to the signal processor 62 for processing, thereby obtaining information such as the distance, speed, and angle of the target object. Simultaneously, the cooling fan 72 and the heat sink 74 work together. The heat sink 74 contacts the signal processing module 6 for heat conduction, cooperating with the heat sink... The heat sink 743 has good conductivity and is made of aluminum alloy, which conducts heat quickly and conducts heat away again. The cooling fan 72 accelerates the airflow and quickly dissipates the heat on the heat sink 743, ensuring the stability of the device during long-term operation. It dissipates the heat generated during operation in a timely manner. Then, the signal processing module 6 slides into the connecting groove 73 through the assembly plate, pushing the movable blocks 732 on both sides to squeeze the telescopic spring column 731. The elasticity of the telescopic spring column 731 is used to spring back and clamp the assembly plate, achieving the function of tightly pressing and fixing the signal processing module 6, which facilitates the stable operation of the equipment.

[0039] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A lidar receiver, comprising a receiver body (1), an optical lens group (4), and a photodetector (5), characterized in that: The receiving device body (1) is fixedly mounted with a mounting shell (2) at one end. The surface of the mounting shell (2) is provided with a laser signal inlet (3). A photodetector (5) is detachably mounted inside the receiving device body (1). The optical lens group (4) is located between the laser signal inlet (3) and the photodetector (5). The optical lens group (4) is composed of two lenses with different focal lengths. The right end of the main body (1) of the receiving device is detachably equipped with an assembly frame (7). The inner side of the assembly frame (7) is fixedly equipped with a heat dissipation mechanism, which includes a heat dissipation plate (74). A heat conduction sheet (743) is fixedly connected to the side of the heat dissipation plate (743). A connecting frame (742) is detachably connected to the other side of the heat conduction sheet (743). One end of the assembly frame (7) is provided with a connecting groove (73). The connecting groove (73) is provided with a snap-fit ​​mechanism. The snap-fit ​​mechanism includes a movable block (732). The bottom of the movable block (732) is fixedly connected to a telescopic spring (731). The bottom of the telescopic spring (731) is fixedly connected to the inner wall of the connecting groove (73).

2. The lidar receiving device according to claim 1, characterized in that: The connecting frame (742) is movably sleeved with a push plate (744) at one end away from the heat-conducting plate (743), and a telescopic column (745) is movably connected to the other end of the push plate (744). The other end of the telescopic column (745) is fixedly connected to the inner side of the assembly frame (7).

3. The lidar receiving device according to claim 1, characterized in that: An mounting plate (741) is fixedly installed on the outside of the heat sink (74), and the two ends of the mounting plate (741) are movably connected to the side of the connecting frame (742).

4. A lidar receiving device according to claim 3, characterized in that: Both the mounting plate (741) and the connecting frame (742) have connecting holes on their surfaces, and the connecting holes are threaded with fixing bolts.

5. A lidar receiving device according to claim 1, characterized in that: A fixing plate is fixedly installed on the inner wall of the assembly frame (7), and a cooling fan (72) is fixedly installed inside the fixing plate.

6. A lidar receiving device according to claim 1, characterized in that: The assembly frame (7) is equipped with a signal processing module (6). An amplifier (61) is fixedly installed at one end of the signal processing module (6), and a signal processor (62) is fixedly installed at the other end of the signal processing module (6). A bandpass filter is fixedly installed between the signal processor (62) and the amplifier (61).

7. A lidar receiving device according to claim 1, characterized in that: Assembly plates are fixedly installed on both sides of the assembly frame (7), and the outer side of the assembly plate is movably installed inside the connecting slide (73).

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