Millimeter wave odometer

Abstract

The invention relates to the technical field of odometers, and discloses a millimeter wave odometer, which comprises a loading box body, the upper end of the loading box body is connected with a loading box body cover plate, the lower end of the loading box body is embedded with a bottom plate, the upper end of the bottom plate is provided with a PCB microstrip-to-waveguide, and four corners of the lower end of the bottom plate are connected with 45-degree waveguide antennas. The bottom ends of the four 45-degree waveguide antennas are all connected with horn antennas, ports of the horn antennas are arranged in a rectangular shape, a T-shaped frame is connected between every two adjacent horn antennas, and the upper end of each T-shaped frame is connected with a fixing plate. Modular design is adopted, system maintenance is facilitated, and system reliability is improved; according to the invention, the two-channel millimeter wave radar scheme is adopted, the precision and reliability of the odometer system are improved, the two radars can provide more accurate and comprehensive target information, and errors and uncertainty are reduced; the two-channel radar system can realize omnibearing detection, is not influenced by vehicle attitude and speed change, and effectively improves the accuracy of the odometer.

Description

Technical Field

[0001] The present invention belongs to the technical field of odometers, and in particular to a millimeter wave odometer. Background Art

[0002] With the rapid development of intelligent transportation systems, vehicles have an increasing demand for high-precision navigation and positioning information. Traditional odometer methods, such as wheel encoders and vision systems, have limitations such as susceptibility to wear and environmental interference, which affects the accuracy and reliability of navigation. Although single-channel millimeter-wave radar has improved anti-interference capabilities to a certain extent, its accuracy is still limited by changes in vehicle motion posture. Therefore, it is particularly important to develop a new, high-precision, and environmentally adaptable odometer device. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a millimeter wave odometer, which effectively solves the problems raised in the above background.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a millimeter wave odometer, comprising a loading box body, a loading box body cover, a bottom plate, a PCB microstrip to waveguide, a 45° waveguide antenna, a horn antenna, a T-shaped frame, a fixing plate, a connecting column, a side heat dissipation hole, a cover plate groove, a fixing block, a fixing hole, a bottom plate groove and an upper heat dissipation hole, the upper end of the loading box body is connected to the loading box body cover, the lower end of the loading box body is embedded with the bottom plate, the upper end of the bottom plate is installed with a PCB microstrip to waveguide, the four corners of the lower end of the bottom plate are connected to 45° waveguide antennas, the bottom ends of the four 45° waveguide antennas are connected to horn antennas, the horn antenna ports are arranged in a rectangular shape, a T-shaped frame is connected between two adjacent horn antennas, the upper end of the T-shaped frame is connected to the fixing plate, and one end of the fixing plate is connected to the lower end of the bottom plate.

[0005] Preferably, the loading box body is internally connected with a plurality of connection columns for placing a high-speed signal PCB, a development board, and a power board for connecting the transceiver chip, and a side heat dissipation hole is opened at the side end of the loading box body.

[0006] Preferably, a cover plate groove is provided at the upper end of the loading box body, the loading box body cover plate is embedded in the cover plate groove, three fixing blocks are connected to both sides of the upper part of the outer wall of the loading box body, and fixing holes are provided at the upper ends of the fixing blocks.

[0007] Preferably, a bottom plate groove is provided at the bottom of the loading box body, and the bottom plate is embedded in the bottom plate groove.

[0008] Preferably, upper heat dissipation holes are provided on the surface of the loading box cover.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] 1. The present invention adopts modular design, which is convenient for system maintenance and improves system reliability;

[0011] 2. The present invention adopts a dual-channel millimeter wave radar solution to improve the accuracy and reliability of the odometer system. The two radars can provide more accurate and comprehensive target information and reduce errors and uncertainties;

[0012] 3. The dual-channel radar system can achieve all-round detection, is not affected by changes in vehicle posture and speed, and effectively improves the accuracy of the odometer;

[0013] 4. The present invention has strong environmental adaptability. The millimeter wave radar signal has extremely strong penetration and anti-interference capabilities. It is not affected by environmental factors such as weather and light, and can work in harsh environments.

[0014] 5. The present invention adopts a rectangular horn antenna as a terminal antenna. The rectangular horn antenna has good directivity and radiation characteristics, which can enable the radar system to obtain higher gain and resolution in a specific direction;

[0015] 6. The rectangular horn antenna can provide good impedance matching, allowing the radiated signal to enter the free space more effectively, reducing the amount of signal reflected back to the waveguide and improving the efficiency of energy transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0017] In the attached picture:

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 It is a front view of the present invention;

[0020] Figure 3 For the present invention Figure 2 A schematic diagram of a local enlarged structure;

[0021] Figure 4 It is a schematic diagram of the structure of the cover plate slot of the present invention;

[0022] Figure 5 It is a schematic diagram of the installation structure of the PCB microstrip to waveguide of the present invention;

[0023] Figure 6 is a cross-sectional view of the present invention;

[0024] Figure 7 It is a schematic diagram of the structure of the bottom plate groove of the present invention;

[0025] In the figure: 1. loading box body; 2. loading box body cover plate; 3. bottom plate; 4. PCB microstrip to waveguide; 5. 45° waveguide antenna; 6. horn antenna; 7. T-shaped frame; 8. fixing plate; 9. connecting column; 10. side heat dissipation hole; 11. cover plate groove; 12. fixing block; 13. fixing hole; 14. bottom plate groove; 15. upper heat dissipation hole. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] Embodiment 1, by Figure 1-Figure 7 The present invention comprises a loading box body 1, a loading box body cover plate 2, a bottom plate 3, a PCB microstrip to waveguide 4, a 45° waveguide antenna 5, a horn antenna 6, a T-shaped frame 7, a fixing plate 8, a connecting column 9, a side heat dissipation hole 10, a cover plate groove 11, a fixing block 12, a fixing hole 13, a bottom plate groove 14 and an upper heat dissipation hole 15, the upper end of the loading box body 1 is connected to the loading box body cover plate 2, the lower end of the loading box body 1 is embedded with the bottom plate 3, the upper end of the bottom plate 3 is installed with a PCB microstrip to waveguide 4, the four corners of the lower end of the bottom plate 3 are connected to 45° waveguide antennas 5, the bottom ends of the four 45° waveguide antennas 5 are connected to horn antennas 6, the ports of the horn antennas 6 are arranged in a rectangular shape, a T-shaped frame 7 is connected between two adjacent horn antennas 6, the upper end of the T-shaped frame 7 is connected to the fixing plate 8, and one end of the fixing plate 8 is connected to the lower end of the bottom plate 3;

[0028] By adopting a rectangular horn antenna 6 as the terminal antenna, the rectangular horn antenna 6 has good directivity, radiation characteristics and impedance matching, which can enable the radar system to obtain higher gain and resolution in a specific direction, so that the radiated signal can enter the free space more effectively, reduce the amount of signal reflected back to the waveguide, and improve the efficiency of energy transmission; through multi-channel design, the system can measure signals in multiple directions at the same time, and through fusion processing, significantly improve the measurement accuracy of the odometer.

[0029] The loading box body 1 is internally connected with a plurality of connection columns 9 for placing a high-speed signal PCB, a development board, and a power board for connecting the transceiver chip. The side end of the loading box body 1 is provided with a side heat dissipation hole 10 to facilitate heat dissipation of the loading box body 1.

[0030] A cover plate groove 11 is provided at the upper end of the loading box body 1, and the loading box body cover plate 2 is embedded in the cover plate groove 11. Three fixing blocks 12 are connected to both sides of the upper part of the outer wall of the loading box body 1, and fixing holes 13 are provided at the upper ends of the fixing blocks 12 to facilitate fixing the device to the bottom of the vehicle to be tested.

[0031] A bottom plate groove 14 is formed at the bottom of the loading box body 1 , and the bottom plate 3 is embedded in the bottom plate groove 14 .

[0032] Upper heat dissipation holes 15 are provided on the surface of the loading box cover 2 to dissipate heat generated by the internal components of the loading box 1 .

[0033] Working principle: millimeter wave signal transmission and reception:

[0034] The PCB microstrip to waveguide 4 in the device is responsible for transmitting the millimeter wave signal from the high-speed signal PCB of the transceiver chip to the 45° waveguide antenna 5. The 45° waveguide antenna 5 serves as a transition structure, converting the direction of the millimeter wave signal into a direction perpendicular to the bottom plate 3, and guiding the signal into the rectangular horn antenna 6;

[0035] The rectangular horn antenna 6 as a terminal antenna has good directivity, radiation characteristics and impedance matching. It can effectively radiate the millimeter wave signal into the free space and obtain higher gain and resolution in a specific direction;

[0036] When the vehicle is driving, the millimeter wave radar system transmits millimeter wave signals through the rectangular horn antenna 6 and receives reflected signals from the surrounding environment (such as the road surface, obstacles, etc.);

[0037] Multi-channel signal processing:

[0038] The present invention adopts a multi-channel design, that is, four rectangular horn antennas 6 are installed, respectively located at the four corners of the loading box body 1; each rectangular horn antenna 6 is responsible for signal measurement in a specific direction, and by transmitting and receiving signals at the same time, the system can obtain reflection information from multiple directions;

[0039] These reflected information are converted into electrical signals and transmitted back to the high-speed signal PCB of the transceiver chip through the PCB microstrip to waveguide 4 for further processing; the signal processing algorithm on the high-speed signal PCB of the transceiver chip is responsible for fusing the measurement data of multiple channels, and obtaining the relative position and speed information between the vehicle and the surrounding environment by calculating parameters such as time difference and phase difference;

[0040] Heat dissipation and fixing:

[0041] The multiple connecting columns 9 connected inside the loading box body 1 are not only used to support and fix the electronic components, but also provide a good heat dissipation channel. The design of the side heat dissipation holes 10 and the upper heat dissipation holes 15 allows the heat generated inside the loading box body 1 to be discharged through natural convection or forced convection, ensuring the stability and reliability of the system under long-term high-intensity work;

[0042] The fixing blocks 12 and the fixing holes 13 on both sides of the upper part of the outer wall of the loading box body 1 provide a convenient fixing method, allowing the device to be firmly installed on the bottom of the vehicle to be tested, ensuring the stability and accuracy of the measurement process;

[0043] Data processing and output:

[0044] The fused position and speed information is further transmitted to the vehicle's navigation system or other related control systems; this information can be used to achieve accurate vehicle positioning, speed monitoring, path planning and other functions, providing the driver with safe and efficient navigation support.

[0045] In summary, the present invention achieves accurate measurement of the position and speed of a vehicle during driving by adopting a multi-channel rectangular horn antenna 6 mm-wave radar system combined with an optimized heat dissipation design and a rugged structural design. This device not only improves the measurement accuracy and stability of the odometer, but also enhances environmental adaptability, providing strong technical support for the development of intelligent transportation systems.

Claims

1. A millimeter wave odometer, comprising a loading box (1), a loading box cover (2), a bottom plate (3), a PCB microstrip to waveguide (4), a 45° waveguide antenna (5), a horn antenna (6), a T-shaped frame (7), a fixing plate (8), a connecting column (9), a side heat dissipation hole (10), a cover plate groove (11), a fixing block (12), a fixing hole (13), a bottom plate groove (14) and an upper heat dissipation hole (15), characterized in that: The upper end of the loading box body (1) is connected to a loading box body cover plate (2), the lower end of the loading box body (1) is embedded with a bottom plate (3), the upper end of the bottom plate (3) is installed with a PCB microstrip to waveguide (4), the four corners of the lower end of the bottom plate (3) are connected to 45° waveguide antennas (5), the bottom ends of the four 45° waveguide antennas (5) are connected to horn antennas (6), the ports of the horn antennas (6) are arranged in a rectangular shape, a T-shaped frame (7) is connected between two adjacent horn antennas (6), the upper end of the T-shaped frame (7) is connected to a fixing plate (8), and one end of the fixing plate (8) is connected to the lower end of the bottom plate (3).

2. The millimeter wave odometer according to claim 1, characterized in that: The loading box body (1) is internally connected with a plurality of connection columns (9) for placing a PCB for connecting a high-speed signal of a transceiver chip, a development board, and a power board. The side end of the loading box body (1) is provided with a side heat dissipation hole (10).

3. The millimeter wave odometer according to claim 1, characterized in that: The upper end of the loading box body (1) is provided with a cover plate groove (11), the loading box body cover plate (2) is embedded in the cover plate groove (11), three fixing blocks (12) are connected to both sides of the upper part of the outer wall of the loading box body (1), and the upper ends of the fixing blocks (12) are provided with fixing holes (13).

4. The millimeter wave odometer according to claim 1, characterized in that: The bottom of the loading box body (1) is provided with a bottom plate groove (14), and the bottom plate (3) is embedded in the bottom plate groove (14).

5. The millimeter wave odometer according to claim 1, characterized in that: An upper heat dissipation hole (15) is provided on the surface of the loading box cover (2).

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