A millimeter wave radar module

Abstract

The present invention discloses a millimeter-wave radar module, which includes a protective shell unit, a heat dissipation unit and a radar unit. The protective shell unit includes a first fixing plate, a second fixing plate, a shell, a first fixing cylinder and a second fixing cylinder. The lower surface of the first fixing plate is fixedly connected to the bottom of the shell, and the top of the shell is fixedly connected to the first fixing plate. The first fixing plate and the second fixing plate have the same structure. The first fixing plate and the second fixing plate are respectively provided with a first cavity, and a second cavity is provided inside the shell. The first fixing plate, the second fixing plate and the outer wall of the shell are respectively fixedly connected to the first fixing cylinder and the second fixing cylinder; the coolant inside the second cavity can cool the first fixing shell and the second fixing shell after passing through the aisle, and can dissipate heat and cool the inside of the protective shell unit, thereby avoiding the situation where the components themselves block the heat dissipation and the heat in the internal central area is difficult to transfer, which is conducive to further improving the heat dissipation effect.

Description

Technical Field

[0001] The present invention relates to the field of radar technology, and in particular to a millimeter wave radar module. Background Art

[0002] At millimeter-wave frequencies, antennas operate at wavelengths down to the millimeter level, making it possible to integrate millimeter-wave chips and antennas. Antenna-on-package technology integrates the antenna within the chip package, effectively balancing antenna size, volume, and cost, providing a promising antenna integration solution for millimeter-wave radar module packaging.

[0003] At present, the Chinese invention patent with application number 202210932177.X discloses a millimeter-wave radar system: the base unit includes a metal heat dissipation base and a connector, the connector is fixed on the metal heat dissipation base, and the gap between the metal heat dissipation base and the connector is sealed by pouring insulating filler; in the related art, the heat dissipation method through the metal heat dissipation base can only be concentratedly dissipated from the bottom of the millimeter-wave radar module, and the internal components of the millimeter-wave radar module are densely arranged, the heat in the internal center area is relatively large, and the components themselves block the heat dissipation, resulting in poor heat dissipation effect. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in the related art, the heat dissipation method through the metal heat dissipation base can only dissipate heat centrally from the bottom of the millimeter-wave radar module. However, the internal components of the millimeter-wave radar module are densely arranged, the heat in the internal center area is relatively large, and the components themselves block the heat dissipation, resulting in poor heat dissipation effect.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a millimeter-wave radar module, comprising a protective shell unit, a heat dissipation unit and a radar unit, the protective shell unit comprising a first fixing plate, a second fixing plate, a shell, a first fixing tube and a second fixing tube, the upper surface of the first fixing plate is fixedly connected to the bottom of the shell, the top of the shell is fixedly connected to the second fixing plate, the first fixing plate and the second fixing plate have the same structure, the first fixing plate and the second fixing plate are respectively provided with a first cavity, the inside of the shell is provided with a second cavity, the first fixing plate, the second fixing plate and the outer wall of the shell are respectively fixedly connected to the first fixing tube and the second fixing tube, and the first cavity and the second cavity are respectively communicated with the inside of the first fixing tube and the second fixing tube; the heat dissipation unit comprises a first fixing shell and a second fixing Shell, the first fixed shell and the second fixed shell are arranged in parallel, an aisle is formed between the first fixed shell and the second fixed shell, the aisle is connected to the second cavity, the bottom of the first fixed shell and the second fixed shell is fixedly connected to the upper surface of the first fixed plate, and the top of the first fixed shell and the second fixed shell is fixedly connected to the lower surface of the second fixed plate; the radar unit includes a transceiver antenna, an oscillator, a microwave transmitting circuit, a power amplifier, a low-noise amplifier, a frequency converter and a demodulator, the oscillator is used to generate a high-frequency millimeter wave signal, and then the high-frequency millimeter wave signal is amplified by the microwave transmitting circuit and transmitted through the transceiver antenna, the transceiver antenna receives the transmitted signal, after amplification by the power amplifier and the low-noise amplifier, it is frequency modulated by the frequency converter, and then demodulated and output by the demodulator.

[0006] As a preferred solution of the millimeter-wave radar module described in the present invention, wherein: the inner wall of the first cavity is fixedly connected to the first horizontal plate, the second horizontal plate and the baffle, the first horizontal plate and the second horizontal plate are fixedly connected to the bottom wall and the top wall of the first cavity, one end of the first horizontal plate is fixedly connected to the baffle, and a gap is left between the other end of the first horizontal plate and the side wall of the first cavity, one end of the second horizontal plate is fixedly connected to the side wall of the first cavity, and a gap is left between the other end of the second horizontal plate and the baffle, and more than one group of the first horizontal plate and the second horizontal plate are provided, the first horizontal plate and the second horizontal plate are arranged alternately, and a gap is left between the baffle and the side wall of the first cavity.

[0007] As a preferred solution of the millimeter-wave radar module described in the present invention, the inner wall of the second cavity is fixedly connected to the first partition and the second partition, one end of the first partition is fixedly connected to the first fixed plate, and a gap is left between the other end of the first partition and the second fixed plate; one end of the second partition is fixedly connected to the second fixed plate, and a gap is left between the other end of the second partition and the first fixed plate.

[0008] As a preferred solution of the millimeter wave radar module of the present invention, the first fixed shell and the second fixed shell are fixedly connected to the outer wall of the fixed tube.

[0009] As a preferred solution of the millimeter-wave radar module described in the present invention, the heat dissipation unit also includes a first control component, which includes a double-headed telescopic rod, a fixed block and a movable block. The double-headed telescopic rod is fixedly connected to one side of the fixed block, and the other side of the fixed block is fixedly connected to the inner wall of the first fixed tube. The two ends of the double-headed telescopic rod are respectively fixedly connected to the movable block, and the movable block is slidably connected to the inner wall of the first fixed tube.

[0010] As a preferred solution of the millimeter wave radar module of the present invention, wherein: the inner wall of the first fixing tube is fixedly connected to a limiting strip.

[0011] As a preferred solution of the millimeter-wave radar module described in the present invention, the double-headed telescopic rod includes a first control cylinder, a first piston head, a first movable rod, a limit block and a first liquid inlet pipe, the inner wall of the first control cylinder is slidingly connected to the first piston head, two first piston heads are provided, the two first piston heads are respectively fixedly connected to the first movable rod, the first movable rod is fixedly connected to the movable block, one of the first piston heads is fixedly connected to the limit block, the outer wall of the first control cylinder is fixedly connected to the fixed block, and the middle part of the first control cylinder is fixedly connected to one end of the first liquid inlet pipe.

[0012] As a preferred solution of the millimeter-wave radar module described in the present invention, the heat dissipation unit also includes a second control component, which includes a third fixed plate, a fourth fixed plate, a movable plate, a telescopic rod and a second liquid inlet pipe. The third fixed plate is fixedly connected to the inner wall of the second cavity, the fourth fixed plate is fixedly connected to the top of the third fixed plate, the fourth fixed plate is fixedly connected to one end of the telescopic rod, the other end of the telescopic rod is fixedly connected to the movable plate, and the telescopic rod is fixedly connected to one end of the second liquid inlet pipe.

[0013] As a preferred solution of the millimeter-wave radar module described in the present invention, the telescopic rod includes a second control cylinder, a second piston head and a second movable rod, the second control cylinder is fixedly connected to the fourth fixed plate, the inner wall of the second control cylinder is slidably connected to the second piston head, the second piston head is fixedly connected to one end of the second movable rod, the other end of the second movable rod is fixedly connected to the movable plate, and the second control cylinder is fixedly connected to one end of the second liquid inlet pipe.

[0014] As a preferred solution of the millimeter-wave radar module described in the present invention, the heat dissipation unit also includes a third control component, which includes a third control cylinder, a first oil inlet pipe, a second oil inlet pipe, a third piston head, a spring and an oil outlet pipe. The third control cylinder is fixedly connected to one end of the first oil inlet pipe and the second oil inlet pipe respectively, the other end of the second oil inlet pipe is fixedly connected to the first fixed cylinder, the oil outlet pipe is fixedly connected to the second fixed cylinder, the inner wall of the third control cylinder is slidably connected to the third piston head, and the third control cylinder is fixedly connected to the other end of the first liquid inlet pipe and the second liquid inlet pipe respectively.

[0015] The beneficial effects of the present invention are as follows: the present invention can perform cooling and heat dissipation in six directions, including up, down, left, right, front and back, which is beneficial to improving the heat dissipation efficiency. The first fixed shell and the second fixed shell are U-shaped. After the coolant inside the second cavity passes through the aisle, it can cool the first fixed shell and the second fixed shell, and can perform heat dissipation and cooling inside the protective shell unit, avoiding the situation where the components themselves block the heat dissipation and the heat in the internal central area is difficult to transfer, which is beneficial to further improve the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the overall structure of the embodiment of the present disclosure.

[0017] Figure 2 In the embodiment of the present disclosure Figure 1 Enlarged schematic diagram of point A in the middle.

[0018] Figure 3 In the embodiment of the present disclosure Figure 1 Enlarged schematic diagram of point B in the middle.

[0019] Figure 4 Schematic diagram of the radar unit structure in an embodiment of the present disclosure.

[0020] Figure 5 2 is a cross-sectional view of the first fixing plate in an embodiment of the present disclosure.

[0021] Figure 6 In the embodiment of the present disclosure Figure 5 Enlarged schematic diagram at point C in the middle.

[0022] Figure 7 In the embodiment of the present disclosure Figure 5 Enlarged schematic diagram at point D in the middle.

[0023] Figure 8 This is a cross-sectional view of the first control cylinder in an embodiment of the present disclosure.

[0024] Figure 9 Schematic diagram of the structure of the second control component in the embodiment of the present disclosure.

[0025] Figure 10 2 is a cross-sectional view of the second control cylinder in an embodiment of the present disclosure.

[0026] Figure 11 This is a cross-sectional view of the third control cylinder in an embodiment of the present disclosure.

[0027] Reference numerals: protective shell unit 1, first fixed plate 11, first cavity 111, first transverse plate 1111, second transverse plate 1112, baffle 1113, second fixed plate 12, shell 13, second cavity 131, first partition 132, second partition 133, first fixed cylinder 14, second fixed cylinder 15, heat dissipation unit 2, first fixed shell 21, aisle 211, second fixed shell 22, fixed pipe 23, first control member 24, double-headed telescopic rod 241, first control cylinder 2411, first piston head 2412, first movable rod 2413, limit block 2414, first liquid inlet pipe 2415, fixed block 2 42, movable block 243, limit bar 244, second control component 25, third fixed plate 251, fourth fixed plate 252, movable plate 253, telescopic rod 254, second control cylinder 2541, second piston head 2542, second movable rod 2543, second liquid inlet pipe 255, third control component 26, third control cylinder 261, first oil inlet pipe 262, second oil inlet pipe 263, third piston head 264, spring 265, oil outlet pipe 266, radar unit 3, transceiver antenna 31, oscillator 32, microwave transmission circuit 33, power amplifier 34, low noise amplifier 35, frequency converter 36, demodulator 37. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] Example

[0030] Reference Figures 1 to 4 This embodiment provides a millimeter-wave radar module, including a protective shell unit 1, a heat dissipation unit 2, and a radar unit 3. The protective shell unit 1 includes a first fixing plate 11, a second fixing plate 12, a shell 13, a first fixing cylinder 14, and a second fixing cylinder 15. The upper surface of the first fixing plate 11 is fixedly connected to the bottom of the shell 13, and the top of the shell 13 is fixedly connected to the second fixing plate 12. The first fixing plate 11 and the second fixing plate 12 have the same structure. The first fixing plate 11 and the second fixing plate 12 are respectively defined by a first cavity 111, and the shell 13 is internally defined by a second cavity 131. The first fixing plate 11, the second fixing plate 12, and the outer walls of the shell 13 are respectively fixedly connected to the first fixing cylinder 14 and the second fixing cylinder 15, and the first cavity 111 and the second cavity 131 are respectively connected to the interior of the first fixing cylinder 14 and the second fixing cylinder 15.

[0031] In this embodiment, cooling oil is preferably pumped into the first fixed cylinder 14. The cooling oil in the first fixed cylinder 14 can enter the first cavity 111 and the second cavity 131 to cool the first fixed plate 11, the second fixed plate 12 and the shell 13. Compared with the existing method of centralized heat dissipation from the bottom of the millimeter-wave radar module, cooling and heat dissipation can be performed in six directions: up, down, left, right, front and back, which is beneficial to improving heat dissipation efficiency.

[0032] The heat dissipation unit 2 includes a first fixed shell 21 and a second fixed shell 22, which are arranged in parallel. A passage 211 is formed between the first fixed shell 21 and the second fixed shell 22, and the passage 211 is connected to the second cavity 131. The bottoms of the first fixed shell 21 and the second fixed shell 22 are fixedly connected to the upper surface of the first fixed plate 11, and the tops of the first fixed shell 21 and the second fixed shell 22 are fixedly connected to the lower surface of the second fixed plate 12.

[0033] In this embodiment, preferably, the first fixed shell 21 and the second fixed shell 22 are U-shaped. After the coolant inside the second cavity 131 passes through the aisle 211, it can cool the first fixed shell 21 and the second fixed shell 22, and can dissipate heat and cool the interior of the protective shell unit 1, avoiding the situation where the components themselves block the heat dissipation and the heat in the internal central area is difficult to transfer, which is conducive to further improving the heat dissipation effect.

[0034] The radar unit 3 includes a transceiver antenna 31, an oscillator 32, a microwave transmission circuit 33, a power amplifier 34, a low-noise amplifier 35, a frequency converter 36 and a demodulator 37. The oscillator 32 is used to generate a high-frequency millimeter wave signal, which is then amplified by the microwave transmission circuit 33 and transmitted through the transceiver antenna 31. The transceiver antenna 31 receives the transmission signal, amplifies it through the power amplifier 34 and the low-noise amplifier 35, performs frequency modulation processing through the frequency converter 36, and then demodulates it and outputs it through the demodulator 37.

[0035] In this embodiment, the transceiver antenna 31, the oscillator 32, the microwave transmission circuit 33, the power amplifier 34, the low noise amplifier 35, the frequency converter 36 and the demodulator 37 are respectively fixedly installed in the cavity formed between the first fixing plate 11, the second fixing plate 12 and the shell 13, and the transceiver antenna 31 is installed in the space between the second fixing shell 22 and the first fixing plate 11 and the second fixing plate 12. Figure 1 In the embodiment, the housing 13 on the left side of the second fixed housing 22 is a single-layer configuration, which facilitates the transceiver antenna 31 to transmit high-frequency millimeter wave signals or receive transmission signals.

[0036] Example

[0037] Reference Figures 1 to 11This embodiment is based on the previous embodiment, and differs from the previous embodiment in that.

[0038] Reference Figure 5 and Figure 6 The inner wall of the first cavity 111 is fixedly connected to the first transverse plate 1111, the second transverse plate 1112 and the baffle 1113, the first transverse plate 1111 and the second transverse plate 1112 are fixedly connected to the bottom wall and the top wall of the first cavity 111, one end of the first transverse plate 1111 is fixedly connected to the baffle 1113, and a gap is left between the other end of the first transverse plate 1111 and the side wall of the first cavity 111, one end of the second transverse plate 1112 is fixedly connected to the side wall of the first cavity 111, and a gap is left between the other end of the second transverse plate 1112 and the baffle 1113, and more than one group of the first transverse plate 1111 and the second transverse plate 1112 are arranged, the first transverse plate 1111 and the second transverse plate 1112 are arranged alternately, and a gap is left between the baffle 1113 and the side wall of the first cavity 111.

[0039] In this embodiment, preferably, the first transverse plate 1111, the second transverse plate 1112 and the baffle 1113 are conducive to improving the structural strength of the first fixed plate 11 and the second fixed plate 12 themselves; when the cooling oil first enters the gap between the baffle 1113 and the side wall of the first cavity 111 from the first fixed cylinder 14, and then continuously passes between the first transverse plate 1111 and the second transverse plate 1112 until it enters the second fixed cylinder 15; the first transverse plate 1111 and the second transverse plate 1112 are conducive to guiding the cooling oil, ensuring that the cooling oil fully flows through the interior of the first cavity 111, which is conducive to improving the cooling effect.

[0040] Reference Figures 1 to 3 The inner wall of the second cavity 131 is fixedly connected to the first partition plate 132 and the second partition plate 133. One end of the first partition plate 132 is fixedly connected to the first fixed plate 11, and a gap is left between the other end of the first partition plate 132 and the second fixed plate 12. One end of the second partition plate 133 is fixedly connected to the second fixed plate 12, and a gap is left between the other end of the second partition plate 133 and the first fixed plate 11.

[0041] In this embodiment, the first partition 132 and the second partition 133 are preferably used to guide the cooling oil inside the second cavity 131, ensuring that the cooling oil fully flows through the second cavity 131, which is beneficial to improving the cooling effect. The cooling oil flows from the first fixed cylinder 14 into the second cavity 131. Figure 1 The shell 13 on the left side of the first fixed shell 21 is cooled, and then enters the second cavity 131 on the right side of the first fixed shell 21 through a connecting pipe 4. Figure 1 The shell 13 on the right side of the first fixed shell 21 is cooled.

[0042] Reference Figure 1The first fixed shell 21 and the second fixed shell 22 are fixedly connected to the outer wall of the fixed tube 23 .

[0043] In this embodiment, preferably, the fixing tube 23 is used to facilitate the connection line of the radar unit 3 to the transceiver antenna 31 .

[0044] Reference Figure 7 The heat dissipation unit 2 also includes a first control component 24, which includes a double-headed telescopic rod 241, a fixed block 242 and a movable block 243. The double-headed telescopic rod 241 is fixedly connected to one side of the fixed block 242, and the other side of the fixed block 242 is fixedly connected to the inner wall of the first fixed cylinder 14. The two ends of the double-headed telescopic rod 241 are respectively fixedly connected to the movable block 243, and the movable block 243 is slidably connected to the inner wall of the first fixed cylinder 14.

[0045] In this embodiment, the fixing block 242 is preferably used to fix the position of the double-ended telescopic rod 241. The first control member 24 is used to control whether the first cavity 111 and the second cavity 131 are connected. When the movable block 243 is in the Figure 7 When the double-headed telescopic rod 241 is in the middle position, the first cavity 111 and the second cavity 131 are not connected. When the double-headed telescopic rod 241 is extended, the double-headed telescopic rod 241 drives the movable block 243 to move, and the cooling oil can enter the first cavity 111.

[0046] Reference Figure 7 The inner wall of the first fixed cylinder 14 is fixedly connected to the limiting strip 244 .

[0047] In this embodiment, the limiting strip 244 is preferably used to block the position of the movable block 243 so that when the double-headed telescopic rod 241 is retracted, the movable block 243 is exactly located at the position of the movable block 243. Figure 7 The position in.

[0048] Reference Figure 8 The double-headed telescopic rod 241 includes a first control cylinder 2411, a first piston head 2412, a first movable rod 2413, a limit block 2414 and a first liquid inlet pipe 2415. The inner wall of the first control cylinder 2411 is slidingly connected to the first piston head 2412. There are two first piston heads 2412, and the two first piston heads 2412 are fixedly connected to the first movable rod 2413 respectively. The first movable rod 2413 is fixedly connected to the movable block 243. One of the first piston heads 2412 is fixedly connected to the limit block 2414. The outer wall of the first control cylinder 2411 is fixedly connected to the fixed block 242, and the middle part of the first control cylinder 2411 is fixedly connected to one end of the first liquid inlet pipe 2415.

[0049] In this embodiment, preferably, the fixed block 242 can fix the position of the first control cylinder 2411; when the hydraulic oil in the first liquid inlet pipe 2415 enters the first control cylinder 2411, it pushes the first piston head 2412 to slide, and the first piston head 2412 drives the movable block 243 to move through the first movable rod 2413; the limit block 2414 can prevent the two first piston heads 2412 from sticking together, leaving a gap between the two first piston heads 2412.

[0050] Reference Figure 9 The heat dissipation unit 2 also includes a second control component 25, which includes a third fixed plate 251, a fourth fixed plate 252, a movable plate 253, a telescopic rod 254 and a second liquid inlet pipe 255. The third fixed plate 251 is fixedly connected to the inner wall of the second cavity 131, the fourth fixed plate 252 is fixedly connected to the top of the third fixed plate 251, the fourth fixed plate 252 is fixedly connected to one end of the telescopic rod 254, the other end of the telescopic rod 254 is fixedly connected to the movable plate 253, and the telescopic rod 254 is fixedly connected to one end of the second liquid inlet pipe 255.

[0051] In this embodiment, the movable plate 253 is preferably L-shaped, the telescopic rod 254 is fixedly connected to the bottom of the movable plate 253, the hydraulic oil in the second liquid inlet pipe 255 enters the telescopic rod 254, the telescopic rod 254 contracts, and the telescopic rod 254 drives the movable plate 253 to move to the bottom of the movable plate 253. Figure 9 The position in the middle allows the coolant to pass through the bottom of the third fixing plate 251.

[0052] Reference Figure 9 The telescopic rod 254 includes a second control cylinder 2541, a second piston head 2542 and a second movable rod 2543. The second control cylinder 2541 is fixedly connected to the fourth fixed plate 252. The inner wall of the second control cylinder 2541 is slidingly connected to the second piston head 2542. The second piston head 2542 is fixedly connected to one end of the second movable rod 2543. The other end of the second movable rod 2543 is fixedly connected to the movable plate 253. The second control cylinder 2541 is fixedly connected to one end of the second liquid inlet pipe 255.

[0053] In this embodiment, when the hydraulic oil enters the second control cylinder 2541 from the second liquid inlet pipe 255, the hydraulic oil pushes the second piston head 2542 to slide, and the second piston head 2542 moves to the Figure 9 The second piston head 2542 drives the movable plate 253 to move through the second movable rod 2543, and the movable plate 253 moves to Figure 9 The position in the middle allows the coolant to pass through the bottom of the third fixing plate 251.

[0054] Reference Figure 11The heat dissipation unit 2 also includes a third control component 26, which includes a third control cylinder 261, a first oil inlet pipe 262, a second oil inlet pipe 263, a third piston head 264, a spring 265 and an oil outlet pipe 266. The third control cylinder 261 is fixedly connected to one end of the first oil inlet pipe 262 and the second oil inlet pipe 263 respectively, the other end of the second oil inlet pipe 263 is fixedly connected to the first fixed cylinder 14, the oil outlet pipe 266 is fixedly connected to the second fixed cylinder 15, the inner wall of the third control cylinder 261 is slidably connected to the third piston head 264, and the third control cylinder 261 is fixedly connected to the other ends of the first liquid inlet pipe 2415 and the second liquid inlet pipe 255 respectively.

[0055] In this embodiment, preferably, the third piston head 264 can slide on the inner wall of the third control cylinder 261, connecting the outlet of the oil pump with the first oil inlet pipe 262, and the inlet of the oil pump with the oil outlet pipe 266. When the oil pump is working, the cooling oil is pumped into the third control cylinder 261 through the first oil inlet pipe 262, and the cooling oil in the third control cylinder 261 enters the first fixed cylinder 14 through the second oil inlet pipe 263. The cooling oil in the first fixed cylinder 14 can enter the first cavity 111 and the second cavity 131 to cool the first fixed plate 11, the second fixed plate 12 and the shell 13. Compared with the method of centralized heat dissipation from the bottom of the millimeter-wave radar module in the prior art, it can cool and dissipate heat from six directions of up, down, left, right, front and back, which is conducive to improving the heat dissipation efficiency. Then the cooling oil enters the oil outlet pipe 266 through the second fixed cylinder 15, and then passes through the oil pump and is re-pumped into the first oil inlet pipe 262 for circulation cooling.

[0056] When working, the outlet of the oil pump is connected to the first oil inlet pipe 262, and the inlet of the oil pump is connected to the oil outlet pipe 266. When the oil pump is working, the cooling oil is pumped into the third control cylinder 261 through the first oil inlet pipe 262, and the cooling oil in the third control cylinder 261 enters the first fixed cylinder 14 through the second oil inlet pipe 263. At this time, the third piston head 264 is located at Figure 11 At this time, the cooling oil in the third control cylinder 261 enters the second fixed cylinder 15 through the second oil inlet pipe 263, and the cooling oil in the first fixed cylinder 14 can enter the second cavity 131. Figure 1 The shell 13 on the left side of the first fixed shell 21 is cooled, and then enters the second cavity 131 on the right side of the first fixed shell 21 through a connecting pipe 4. Figure 1 The oil is cooled in the shell 13 on the right side of the first fixed shell 21 and then enters the second fixed cylinder 15, passes through the oil outlet pipe 266, and then passes through the oil pump and is pumped back into the first oil inlet pipe 262 for circulation cooling.

[0057] At this time, when the active block 243 is located at Figure 7When the radar unit 3 is in the middle position, the first cavity 111 and the second cavity 131 are not connected, and the cooling oil cannot enter the second cavity 131. If the radar unit 3 works continuously for a long time, it is necessary to further improve the cooling effect. At this time, the oil pump is controlled to increase the oil pumping volume. Since there is resistance in the cooling oil inside the first cavity 111, and as the flow rate increases, the resistance will also increase, resulting in an increase in the pressure inside the third control cylinder 261. At this time, the third piston head 264 overcomes the elastic force of the spring 265 and moves upward, pressing the hydraulic oil above the third piston head 264 into the first liquid inlet pipe 2415 and the second liquid inlet pipe 255. When the hydraulic oil in the first liquid inlet pipe 2415 enters In the first control cylinder 2411, the first piston head 2412 is pushed to slide, and the first piston head 2412 drives the movable block 243 to move through the first movable rod 2413. At this time, the cooling oil can enter the first cavity 111 through the two ends of the first fixed cylinder 14. The cooling oil first enters the gap between the baffle 1113 and the side wall of the first cavity 111, and then continuously passes between the first transverse plate 1111 and the second transverse plate 1112 until it enters the second fixed cylinder 15; the first transverse plate 1111 and the second transverse plate 1112 are used to guide the cooling oil, ensuring that the cooling oil fully flows through the inside of the first cavity 111, which is beneficial to improving the cooling effect.

[0058] At the same time, the hydraulic oil enters the second control cylinder 2541 from the second liquid inlet pipe 255, and the hydraulic oil pushes the second piston head 2542 to slide. Figure 9 The second piston head 2542 drives the movable plate 253 to move through the second movable rod 2543, and the movable plate 253 moves to Figure 9 The position in the middle allows the coolant to pass through the bottom of the third fixed plate 251. After the coolant inside the second cavity 131 passes through the aisle 211, it can cool the first fixed shell 21 and the second fixed shell 22, and can dissipate heat and cool the inside of the protective shell unit 1, avoiding the situation where the components themselves block the heat dissipation and the heat in the internal central area is difficult to transfer, which is beneficial to improving the heat dissipation effect, and can cool the first fixed plate 11, the second fixed plate 12 and the shell 13. Compared with the method of centralized heat dissipation from the bottom of the millimeter-wave radar module in the prior art, it can cool and dissipate heat from six directions of up, down, left, right, front and back, which is beneficial to improving the heat dissipation efficiency. It can perform hierarchical control of cooling and heat dissipation according to the heating condition of the radar unit 3, and the cooling and heat dissipation control is more flexible.

Claims

1. A millimeter wave radar module, characterized in that: include A protective shell unit (1), the protective shell unit (1) comprising a first fixing plate (11), a second fixing plate (12), a shell (13), a first fixing cylinder (14) and a second fixing cylinder (15), the upper surface of the first fixing plate (11) being fixedly connected to the bottom of the shell (13), the top of the shell (13) being fixedly connected to the second fixing plate (12), the first fixing plate (11) and the second fixing plate (12) having the same structure, the first fixing plate (11) and the second fixing plate (12) being respectively provided with a first cavity (111), the interior of the shell (13) being provided with a second cavity (131), the outer walls of the first fixing plate (11), the second fixing plate (12) and the shell (13) being respectively fixedly connected to the first fixing cylinder (14) and the second fixing cylinder (15), and the first cavity (111) and the second cavity (131) being respectively communicated with the interior of the first fixing cylinder (14) and the second fixing cylinder (15); A heat dissipation unit (2), the heat dissipation unit (2) comprising a first fixed shell (21) and a second fixed shell (22), the first fixed shell (21) and the second fixed shell (22) being arranged in parallel, a passage (211) being formed between the first fixed shell (21) and the second fixed shell (22), the passage (211) being connected to the second cavity (131), the bottoms of the first fixed shell (21) and the second fixed shell (22) being fixedly connected to the upper surface of the first fixed plate (11), and the tops of the first fixed shell (21) and the second fixed shell (22) being fixedly connected to the lower surface of the second fixed plate (12); A radar unit (3) includes a transceiver antenna (31), an oscillator (32), a microwave transmission circuit (33), a power amplifier (34), a low-noise amplifier (35), a frequency converter (36) and a demodulator (37). The oscillator (32) is used to generate a high-frequency millimeter wave signal, and then the high-frequency millimeter wave signal is amplified by the microwave transmission circuit (33) and transmitted through the transceiver antenna (31). The transceiver antenna (31) receives the transmission signal, amplifies it through the power amplifier (34) and the low-noise amplifier (35), performs frequency modulation processing through the frequency converter (36), and then demodulates it through the demodulator (37) and outputs it.

2. The millimeter-wave radar module according to claim 1, wherein: The inner wall of the first cavity (111) is fixedly connected to the first transverse plate (1111), the second transverse plate (1112) and the baffle (1113); the first transverse plate (1111) and the second transverse plate (1112) are fixedly connected to the bottom wall and the top wall of the first cavity (111); one end of the first transverse plate (1111) is fixedly connected to the baffle (1113); a gap is left between the other end of the first transverse plate (1111) and the side wall of the first cavity (111); one end of the second transverse plate (1112) is fixedly connected to the side wall of the first cavity (111); a gap is left between the other end of the second transverse plate (1112) and the baffle (1113); more than one set of the first transverse plate (1111) and the second transverse plate (1112) is provided; the first transverse plate (1111) and the second transverse plate (1112) are alternately provided; and a gap is left between the baffle (1113) and the side wall of the first cavity (111).

3. The millimeter-wave radar module according to claim 1, wherein: The inner wall of the second cavity (131) is fixedly connected to the first partition (132) and the second partition (133); one end of the first partition (132) is fixedly connected to the first fixed plate (11), and a gap is left between the other end of the first partition (132) and the second fixed plate (12); one end of the second partition (133) is fixedly connected to the second fixed plate (12), and a gap is left between the other end of the second partition (133) and the first fixed plate (11).

4. The millimeter wave radar module according to claim 1, wherein: The first fixed shell (21) and the second fixed shell (22) are fixedly connected to the outer wall of the fixed tube (23).

5. The millimeter wave radar module according to claim 1, wherein: The heat dissipation unit (2) further comprises a first control member (24), the first control member (24) comprising a double-headed telescopic rod (241), a fixed block (242) and a movable block (243), the double-headed telescopic rod (241) being fixedly connected to one side of the fixed block (242), the other side of the fixed block (242) being fixedly connected to the inner wall of the first fixed cylinder (14), the two ends of the double-headed telescopic rod (241) being fixedly connected to the movable block (243), and the movable block (243) being slidably connected to the inner wall of the first fixed cylinder (14).

6. The millimeter wave radar module according to claim 5, wherein: The inner wall of the first fixed cylinder (14) is fixedly connected to a limiting strip (244).

7. The millimeter wave radar module according to claim 5, wherein: The double-head telescopic rod (241) comprises a first control cylinder (2411), a first piston head (2412), a first movable rod (2413), a limiting block (2414) and a first liquid inlet pipe (2415). The inner wall of the first control cylinder (2411) is slidably connected to the first piston head (2412). Two first piston heads (2412) are provided. The two first piston heads (2412) are respectively fixedly connected to the first movable rod (2413). The first movable rod (2413) is fixedly connected to the movable block (243). One of the first piston heads (2412) is fixedly connected to the limiting block (2414). The outer wall of the first control cylinder (2411) is fixedly connected to the fixed block (242), and the middle part of the first control cylinder (2411) is fixedly connected to one end of the first liquid inlet pipe (2415).

8. The millimeter wave radar module according to claim 7, wherein: The heat dissipation unit (2) further includes a second control member (25), the second control member (25) including a third fixed plate (251), a fourth fixed plate (252), a movable plate (253), a telescopic rod (254) and a second liquid inlet pipe (255), the third fixed plate (251) being fixedly connected to the inner wall of the second cavity (131), the fourth fixed plate (252) being fixedly connected to the top of the third fixed plate (251), the fourth fixed plate (252) being fixedly connected to one end of the telescopic rod (254), the other end of the telescopic rod (254) being fixedly connected to the movable plate (253), and the telescopic rod (254) being fixedly connected to one end of the second liquid inlet pipe (255).

9. The millimeter wave radar module according to claim 8, wherein: The telescopic rod (254) includes a second control cylinder (2541), a second piston head (2542) and a second movable rod (2543), wherein the second control cylinder (2541) is fixedly connected to the fourth fixed plate (252), the inner wall of the second control cylinder (2541) is slidably connected to the second piston head (2542), the second piston head (2542) is fixedly connected to one end of the second movable rod (2543), the other end of the second movable rod (2543) is fixedly connected to the movable plate (253), and the second control cylinder (2541) is fixedly connected to one end of the second liquid inlet pipe (255).

10. The millimeter wave radar module according to claim 9, wherein: The heat dissipation unit (2) further comprises a third control member (26), comprising a third control cylinder (261), a first oil inlet pipe (262), a second oil inlet pipe (263), a third piston head (264), a spring (265) and an oil outlet pipe (266); the third control cylinder (261) is fixedly connected to one end of the first oil inlet pipe (262) and the second oil inlet pipe (263), the other end of the second oil inlet pipe (263) is fixedly connected to the first fixed cylinder (14), the oil outlet pipe (266) is fixedly connected to the second fixed cylinder (15), the inner wall of the third control cylinder (261) is slidably connected to the third piston head (264), and the third control cylinder (261) is fixedly connected to the other end of the first liquid inlet pipe (2415) and the second liquid inlet pipe (255).

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