Laser radar temperature control device

Abstract

The utility model discloses a laser radar temperature control device, which relates to the technical field of laser radars and comprises a shell, one end of the shell is provided with a first panel assembly, and the other end of the shell is sequentially provided with a second panel assembly and a refrigeration assembly. A fixed base is arranged in the shell, and a first heat dissipation assembly and a second heat dissipation assembly are sequentially arranged at the bottom of the shell. According to the utility model, a multi-stage temperature control mode is adopted, and the series-parallel connection mode of the heat dissipation flow channels is reasonably arranged, so that the heat exchange capability difference of different heat flux areas in the laser radar is reduced through the reasonable design of the heat dissipation area and the heat exchange temperature, the problem of non-uniform heat flux in the laser radar is effectively reduced, the deviation of a light path is reduced, and the heat exchange efficiency is improved. The stability of laser radar measurement is improved, and the problem of deviation of an internal light path of the laser radar caused by non-uniform distribution of heat flux density in the laser radar is solved.

Description

Technical Field

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

[0002] Ozone is an important gas in the atmosphere. Three-dimensional Raman ozone lidar is used to detect the concentration and spatiotemporal distribution of ozone in the atmosphere. It uses the principle of ultraviolet differential absorption to invert ozone concentration, enabling synchronous and rapid source tracing, short-term forecasting, and emergency detection of ozone.

[0003] Three-dimensional Raman ozone lidar uses an all-solid-state laser as its light source, which is deflected by mirrors, Raman crystals, and frequency-doubling crystals. Due to the high heat dissipation of high-power devices such as the laser and acousto-optic actuators, the heat flux density distribution inside the lidar is uneven. Thermal deformation occurs near the optical path components, causing slight displacements in the fixed optical components. Fluctuations in internal temperature can lead to optical path misalignment within the internal equipment, thus affecting measurement accuracy.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0005] In view of the problems in the related technologies, this utility model proposes a laser radar temperature control device to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] Therefore, the specific technical solution adopted by this utility model is as follows:

[0007] A lidar temperature control device includes a housing, with a first panel assembly at one end of the housing and a second panel assembly and a cooling assembly sequentially arranged at the other end of the housing; a fixed base is arranged inside the housing, and a first heat dissipation assembly and a second heat dissipation assembly are sequentially arranged at the bottom of the housing.

[0008] Furthermore, in order to detect and provide feedback on the current ambient temperature and humidity, the first panel assembly includes a first panel disposed at one end of the housing, a wiper disposed on the side wall of the first panel, an external temperature and humidity detection plate disposed at one end of the wiper, and a window mirror disposed on the side of the wiper and inside the first panel.

[0009] Furthermore, in order to improve the structural stability of the optical path area, the fixed base includes a base plate set inside the housing, a number of heat dissipation pipes are set in the middle of the base plate, a first support leg and a second support leg are set in sequence at one end of the base plate, and a first auxiliary support leg and a second auxiliary support leg are set in sequence at the other end of the base plate.

[0010] Furthermore, in order to better achieve heat dissipation by connecting with optical devices with high heat dissipation, the first heat dissipation component includes a fan shield set at the bottom of the housing, a heat dissipation component base plate set inside the fan shield, a fan fixing plate set at the top of the heat dissipation component base plate, and a fan set on the side wall of the fan fixing plate; a first heat dissipation fin and a second heat dissipation fin are sequentially set in the middle of the fan fixing plate.

[0011] Furthermore, in order to provide forced air cooling for the internal components of the lidar, the cooling assembly includes a cooling assembly mounting plate disposed on the housing away from the first panel assembly. On one side of the cooling assembly mounting plate, a cooling assembly heat sink and an internal cooling assembly fan are arranged in sequence. On the other side of the cooling assembly mounting plate, an external cooling assembly fan is arranged. A dust cover for the external cooling assembly fan is provided outside the external cooling assembly fan.

[0012] The beneficial effects of this utility model are as follows:

[0013] (1) In view of the problem of uneven heat flux density distribution inside the lidar causing internal optical path deviation, this utility model adopts a multi-level temperature control method and reasonably sets the heat dissipation channel in series and parallel. The heat dissipation area and heat exchange temperature are reasonably designed to reduce the difference in heat exchange capacity of different heat flux density areas inside the lidar, effectively reducing the problem of uneven heat flux density inside the lidar, reducing optical path deviation, and improving the stability of lidar measurement.

[0014] (2) By setting an external temperature and humidity detection board, the current ambient temperature and humidity can be detected and fed back, thereby completing the power control of the lidar temperature control device; by setting a first heat dissipation component and a second heat dissipation component, the heat dissipation function can be better realized by connecting with optical devices with high heat dissipation capacity; by setting a cooling component, the lidar can be forced to cool.

[0015] (3) Multiple heat dissipation pipes are evenly distributed on the base plate, and the tails of the multiple heat dissipation pipes are connected in series with the first heat dissipation component and the second heat dissipation component, thereby balancing the offset of the optical path components. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a laser radar temperature control device according to an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the first panel assembly in a laser radar temperature control device according to an embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the fixed base in a laser radar temperature control device according to an embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the first heat dissipation component in a laser radar temperature control device according to an embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the cooling component in a laser radar temperature control device according to an embodiment of the present invention.

[0022] In the picture:

[0023] 1. First panel assembly; 11. Wiper blade; 12. External temperature and humidity detection board; 13. First panel; 14. Window mirror; 2. Housing; 3. Fixed base; 31. Heat dissipation pipe; 32. Base plate; 33. First auxiliary support leg; 34. Second auxiliary support leg; 35. First support leg; 36. Second support leg; 4. First heat dissipation assembly; 41. Fan protective cover; 42. Heat dissipation assembly base plate; 43. Second heat dissipation fins; 44. First heat dissipation fins; 45. Fan; 46. Fan mounting plate; 5. Cooling assembly; 51. Cooling assembly dust cover; 52. Cooling assembly internal fan; 53. Cooling assembly heat dissipation plate; 54. Cooling assembly mounting plate; 55. Cooling assembly external fan; 6. Second heat dissipation assembly; 7. Second panel assembly. Detailed Implementation

[0024] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0025] According to an embodiment of the present invention, a lidar temperature control device is provided.

[0026] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-5As shown, the lidar temperature control device according to an embodiment of this utility model includes a housing 2. A first panel assembly 1 (front panel assembly) is disposed at one end of the housing 2, and a second panel assembly 7 (rear panel assembly) and a cooling assembly 5 are sequentially disposed at the other end of the housing 2. A fixed base 3 is disposed inside the housing 2, and a first heat dissipation assembly 4 and a second heat dissipation assembly 6 are sequentially disposed at the bottom of the housing 2. The first panel assembly 1, the cooling assembly 5, and the second panel assembly 7 are fixed to both ends of the housing 2 by screws. Two grooves are provided at the bottom of the housing 2 to fix the first heat dissipation assembly 4 and the second heat dissipation assembly 6 respectively. The cooling assembly 5, the first heat dissipation assembly 4, and the second heat dissipation assembly 6 constitute the overall temperature control system of the lidar housing. After installation, the housing 2, the first panel assembly 1, and the second panel assembly 7 meet or exceed the IP66 protection rating.

[0027] By employing the above-mentioned solution, this utility model adopts a multi-stage temperature control method and rationally sets up the series and parallel heat dissipation channels. By rationally designing the heat dissipation area and heat exchange temperature, the difference in heat exchange capacity between different heat flux density regions inside the lidar is reduced, effectively reducing the problem of uneven heat flux density inside the lidar, reducing optical path offset, and improving the stability of lidar measurement.

[0028] In one embodiment, the first panel assembly 1 includes a first panel 13 disposed at one end of the housing 2. A wiper 11 is disposed on the side wall of the first panel 13. An external temperature and humidity detection plate 12 is disposed at one end of the wiper 11. A window mirror 14 is disposed on the side of the wiper 11 and inside the first panel 13. The window mirror 14 is fixed inside the groove in the middle of the first panel 13 and is coated with sealant around its perimeter. The external temperature and humidity detection plate 12 is fixed in the circular groove on the wiper 11, thereby enabling the detection and feedback of the current ambient temperature and humidity, and thus completing the power control of the lidar temperature control device.

[0029] In one embodiment, the fixed base 3 includes a base plate 32 disposed inside the housing 2. A plurality of heat dissipation pipes 31 are disposed in the middle of the base plate 32 and are embedded in the groove of the base plate 32. A first support leg 35 and a second support leg 36 are disposed sequentially at one end of the base plate 32, and a first auxiliary support leg 33 and a second auxiliary support leg 34 are disposed sequentially at the other end of the base plate 32. Thus, the heat conduction coefficient of the base plate 32 is increased by the design of the evenly distributed heat dissipation pipes 31, and the heat flux density difference in the area of ​​the base plate 32 is reduced. The heat dissipation pipes 31 are connected in parallel to the second heat dissipation fins 43, thereby reducing the heat flux density in the area of ​​the base plate 32.

[0030] Multiple heat dissipation pipes 31 are evenly distributed on the base plate 32, and the tails of the multiple heat dissipation pipes 31 are connected in series with the first heat dissipation component 4 and the second heat dissipation component 6 to balance the offset of the optical path components, that is, to reduce the heat flux density difference in the area of ​​the base plate 32 and improve the structural stability of the optical path area.

[0031] In one embodiment, the first heat dissipation component 4 includes a fan shield 41 disposed at the bottom of the housing 2, a heat dissipation component base plate 42 disposed inside the fan shield 41, a fan fixing plate 46 disposed at the top of the heat dissipation component base plate 42, and a fan 45 disposed on the side wall of the fan fixing plate 46; a first heat dissipation fin 44 and a second heat dissipation fin 43 are disposed sequentially in the middle of the fan fixing plate 46, thereby achieving better heat dissipation function by connecting with optical devices with high heat dissipation capacity.

[0032] The fan guard 41 and the heat dissipation component base plate 42 are fixed on the housing 2. The second heat dissipation fin 43, the first heat dissipation fin 44 and the fan fixing plate 46 are fixed on the heat dissipation component base plate 42. The second heat dissipation fin 43, the first heat dissipation fin 44 and the fan 45 are on the side in contact with the air.

[0033] The heat dissipation component base plate 42 is used to fix small components with high heat dissipation inside the lidar, reducing the temperature impact of the heat dissipation components on the fixed base 3. The first heat dissipation fin 44 and the second heat dissipation fin 43 are equipped with thermoelectric coolers. The hot surface of the thermoelectric cooler is connected to the relevant heat dissipation fins. The heat of the relevant heat dissipation fins is blown away by the fan 45, reducing the heat flux density on the outside of the first heat dissipation component 4. The first heat dissipation component 4 and the second heat dissipation component 6 have similar structures.

[0034] In one embodiment, the cooling component 5 includes a cooling component fixing plate 54 disposed on the housing 2 away from the first panel component 1. A cooling component heat sink 53 and an internal cooling component fan 52 are sequentially disposed on one side of the cooling component fixing plate 54, and an external cooling component fan 55 is disposed on the other side of the cooling component fixing plate 54. A cooling component dust cover 51 is disposed outside the external cooling component fan 55, thereby providing forced air cooling for the inside of the lidar.

[0035] The cooling component mounting plate 54 is fixed to the rear of the housing 2, and the internal fan 52 of the cooling component is fixed to the inner side of the cooling component mounting plate 54. The cooling component dust cover 51, the cooling component heat sink 53, and the external fan 55 of the cooling component are fixed to the side of the cooling component mounting plate 54. A thermoelectric cooler is located in the middle of the cooling component mounting plate 54, with the inner side of the cooling component mounting plate 54 being the cold side and the outer side being the hot side.

[0036] The working principle of the cooling component 5 is as follows: The rotation of the fan 52 inside the cooling component creates air turbulence inside the radar, reducing the heat flux density difference inside the lidar. A thermoelectric cooler is installed inside the fixing plate 54 of the cooling component. The thermoelectric cooler transfers the heat from the heat dissipation fins inside the cooling component 5 to the heat dissipation fins outside the cooling component 5. The rotation of the fan 55 outside the cooling component reduces the heat accumulation on the heat dissipation fins outside the fixing plate 54 of the cooling component, reduces the temperature difference between the inside and outside, and improves the heat dissipation efficiency of the cooling component 5.

[0037] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0038] In practical applications, this invention directly cools the heat-generating components inside the lidar by using the first heat dissipation component 4 and the second heat dissipation component 6. By setting the input current, the temperature of the cold surfaces of the first heat dissipation component 4 and the second heat dissipation component 6 is controlled to be the same. At the same time, the cooling component 5 forms a steady-state turbulence in the internal cavity of the lidar, further reducing the difference in heat flux density inside the lidar.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A temperature control device for a laser radar comprising a housing (2), characterized in that One end of the shell (2) is provided with a first panel assembly (1), and the other end of the shell (2) is sequentially provided with a second panel assembly (7) and a refrigeration assembly (5); The inside of the shell (2) is provided with a fixed base (3), and the bottom of the shell (2) is sequentially provided with a first heat dissipation assembly (4) and a second heat dissipation assembly (6); The refrigeration assembly (5) includes a refrigeration assembly fixing plate (54) arranged away from the first panel assembly (1) of the shell (2), one side of the refrigeration assembly fixing plate (54) is sequentially provided with a refrigeration assembly heat dissipation plate (53) and a refrigeration assembly internal fan (52), the other side of the refrigeration assembly fixing plate (54) is provided with a refrigeration assembly external fan (55), and the outside of the refrigeration assembly external fan (55) is provided with a refrigeration assembly dust cover (51).

2. The temperature control device for a laser radar according to claim 1, wherein The first panel assembly (1) includes a first panel (13) arranged at one end of the shell (2), a wiper (11) is arranged on the side wall of the first panel (13), one end of the wiper (11) is provided with an external temperature and humidity detection plate (12), and a window mirror (14) is arranged on the side edge of the wiper (11) and located in the first panel (13).

3. The temperature control device for a laser radar according to claim 1, wherein The fixed base (3) includes a bottom plate (32) arranged in the inside of the shell (2), a plurality of heat dissipation pipes (31) are arranged in the middle of the bottom plate (32), a first supporting leg (35) and a second supporting leg (36) are sequentially arranged at one end of the bottom plate (32), and a first auxiliary supporting leg (33) and a second auxiliary supporting leg (34) are sequentially arranged at the other end of the bottom plate (32).

4. The temperature control device for a laser radar according to claim 1, wherein The first heat dissipation assembly (4) includes a fan protection cover (41) arranged at the bottom of the shell (2), a heat dissipation assembly bottom plate (42) is arranged in the inside of the fan protection cover (41), a fan fixing plate (46) is arranged at the top end of the heat dissipation assembly bottom plate (42), and a fan (45) is arranged on the side wall of the fan fixing plate (46).

5. The temperature control device for a lidar according to claim 4, wherein The middle part of the fan fixing plate (46) is sequentially provided with a first heat dissipation fin (44) and a second heat dissipation fin (43).

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