Target structure based on 4d millimeter wave slope monitoring radar system

Abstract

The utility model discloses a target structure based on 4D millimeter wave side slope monitoring radar system, include: corner reflector, including three isosceles right angle board, two two perpendicular of three isosceles right angle board, two degrees of freedom adjusting joint, including carousel and two adjusting board, two adjusting board symmetry sets up in carousel bottom, is equipped with cooperation hole and arc -shaped sliding slot on the adjusting board, connect the bent pole, the connection bent pole is > shape, and one end is fixedly connected in one of isosceles right angle board's bottom, and the other end is provided with the pivot and sliding part, and the pivot both ends are respectively threaded in a cooperation hole, and the sliding part is slidably connected in the arc -shaped sliding slot. The utility model will be the structure improvement of reflector be three isosceles right angle board and be combined together through the orthogonal mode, and the incident electromagnetic wave is concentrated reflection back radar receiving end, can significantly enhance echo intensity, also can reduce the edge diffraction, avoid the stray reflection interference phase solution in complex environment.

Description

Technical Field

[0001] This utility model relates to the field of millimeter-wave radar equipment monitoring technology, specifically to the target structure of a 4D millimeter-wave slope monitoring radar system. Background Technology

[0002] Bridges, tunnels, slopes, and other engineering structures are core components of transportation networks and water conservancy facilities, and their long-term safety and structural stability are of great concern. 4D millimeter-wave slope monitoring radar, a novel engineering structure monitoring technology that has emerged in recent years, has demonstrated significant advantages in monitoring large-span and complex environments such as slopes due to its high measurement accuracy, long-distance monitoring capabilities, and adaptability to complex weather conditions, making it an important technological direction for meeting these monitoring needs. Among these components, the target, as a core supporting device for achieving high-precision monitoring in a 4D millimeter-wave radar system, directly determines the quality of the radar echo signal and the reliability of the monitoring data, and is a key element in solving problems such as low monitoring accuracy and poor stability in complex engineering environments. However, the common metal reflective targets (such as triangular targets and metal ball targets) widely used in current engineering practice still have the following problems when adapting to the monitoring needs of 4D millimeter-wave radar and dealing with complex engineering environments: the signal reflection intensity is unstable and the target surface is easily damaged; the high thermal expansion coefficient of metal targets makes it easy for the large temperature difference between day and night to cause micro-deformation of the layout, resulting in errors in displacement measurement; the planar structure is prone to edge diffraction, which can cause multi-path reflection on complex slopes (such as rock and soil interlacing environments), interfering with radar phase calculation; and regular manual cleaning and angle calibration are required (especially after heavy rain and sandstorms), resulting in high operation and maintenance costs in mountainous areas.

[0003] In summary, the current technical limitations of ordinary metal reflective targets have become a key bottleneck restricting the full utilization of the high precision and real-time advantages of 4D millimeter-wave radar in engineering structure monitoring. There is an urgent need to develop a new type of target that can overcome the above-mentioned defects, adapt to complex engineering environments, and has high stability and low operation and maintenance costs, so as to meet the actual needs of engineering structure safety monitoring. Utility Model Content

[0004] The purpose of this invention is to propose a target structure based on a 4D millimeter-wave slope monitoring radar system in order to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: The target structure based on the 4D millimeter-wave slope monitoring radar system includes: A corner reflector comprising three isosceles right-angled plates, the three isosceles right-angled plates being perpendicular to each other; A dual-degree-of-freedom adjusting joint includes a turntable and two adjusting plates. The two adjusting plates are symmetrically arranged at the bottom of the turntable. The adjusting plates are provided with mating holes and arc-shaped sliding grooves. A connecting rod is provided, which is shaped like a >. One end is fixed to the bottom of one of the isosceles right-angled plates, and the other end is provided with a rotating shaft and a sliding member. The two ends of the rotating shaft are respectively inserted into a mating hole, and the sliding member is slidably connected in the arc-shaped groove.

[0006] As a preferred technical solution, the upper surface of the turntable is provided with a number of positioning holes circumferentially along the center.

[0007] As a preferred technical solution, the isosceles right-angled plate has a waist length of 30cm, a base length of 42.4cm, and a thickness of 2mm.

[0008] As a preferred technical solution, the flatness of the inner side of the corner reflector is ≤0.01mm.

[0009] As a preferred technical solution, the three isosceles right-angled plates are fixed together in pairs by welding, and the weld is located on the outside of the corner reflector.

[0010] As a preferred technical solution, the arc-shaped groove is concentrically arranged with the mating hole, and the arc-shaped groove is farther away from the turntable than the mating hole.

[0011] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: This invention improves the structure of the reflector by combining three isosceles right-angled plates in an orthogonal manner, which concentrates the incident electromagnetic waves and reflects them back to the radar receiver, significantly enhancing the echo intensity. Furthermore, the three-sided orthogonal configuration allows the target to receive the radar beam over a wider angular range, adapting to complex detection scenarios. The pyramidal configuration also reduces edge diffraction and avoids stray reflections interfering with phase calculation in complex environments. Attached Figure Description

[0012] Figure 1 An isometric view of this utility model is shown; Figure 2 A side view of the present invention is shown; Figure 3 A side view of the connecting bend of this utility model is shown.

[0013] Legend: 1. Isosceles right-angled plate; 2. Turntable; 3. Adjusting plate; 4. Mating hole; 5. Arc-shaped slide groove; 6. Connecting bent rod; 7. Rotating shaft; 8. Sliding component; 9. Positioning hole. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0015] Example 1 like Figure 1-3 As shown, this embodiment discloses a target structure based on a 4D millimeter-wave slope monitoring radar system, including: A corner reflector comprising three isosceles right-angled plates 1, wherein the three isosceles right-angled plates 1 are perpendicular to each other in pairs; A dual-degree-of-freedom adjustment joint includes a turntable 2 and two adjustment plates 3. The two adjustment plates 3 are symmetrically arranged at the bottom of the turntable 2. The adjustment plates 3 are provided with mating holes 4 and arc-shaped sliding grooves 5. A connecting rod 6 is shaped like a >, with one end fixed to the bottom of one of the isosceles right-angled plates 1, and the other end provided with a rotating shaft 7 and a sliding member 8. The two ends of the rotating shaft 7 are respectively inserted into a mating hole 4, and the sliding member 8 is slidably connected in the arc-shaped groove 5.

[0016] The corner reflector consists of three isosceles right-angled plates 1, which are perpendicular to each other and fixedly connected at their edges to form a reflective cavity. The dual-degree-of-freedom adjustment joint includes a turntable 2 and two adjustment plates 3, which are symmetrically welded to the bottom of the turntable 2. The adjustment plates 3 are provided with mating holes 4 and arc-shaped grooves 5, which are located on one side of the mating holes 4 and are arc-shaped. The connecting bent rod 6 is shaped like a >, with one end fixedly connected to the bottom of one of the isosceles right-angled plates 1, and the other end provided with a rotating shaft 7 and a sliding member 8. The two ends of the rotating shaft 7 are respectively inserted into the mating holes 4 of the two adjustment plates 3, and the sliding member 8 is engaged in the arc-shaped grooves 5 of the two adjustment plates 3 and can slide along the grooves. Through the rotational engagement of the rotating shaft 7 and the mating holes 4, and the sliding engagement of the sliding member 8 and the arc-shaped grooves 5, the pitch angle of the corner reflector can be adjusted around the rotating shaft 7. Through the horizontal rotation of the turntable 2, the horizontal angle of the corner reflector can be adjusted.

[0017] It should be noted that this application does not impose further restrictions on how the slider 8 is locked in the arc-shaped groove 5, as this is not the focus of this application and therefore is not elaborated further. For example, the slider 8 can be a screw structure, which is locked in the arc-shaped groove 5 by a wing nut.

[0018] Example 2 like Figure 1-3 As shown, this embodiment is developed based on Embodiment 1 to solve the positioning problem of the turntable 2. The upper surface of the turntable 2 has several positioning holes 9 circumferentially formed around its center. The turntable 2 is fixed in its installation position by screwing screws into the positioning holes 9. When rotation is required, the screws are unscrewed, the angle of the turntable 2 is adjusted, and then the screws are screwed in again to fix the turntable 2.

[0019] Example 3 like Figure 1-3 As shown, this embodiment is based on Embodiment 1. The isosceles right-angled plate 1 has a waist length of 30cm, a base length of 42.4cm, and a thickness of 2mm. When the isosceles right-angled plate 1 of this size is used to form a corner reflector, the resulting reflective cavity has a moderate volume. This ensures effective reception and reflection area for 4D millimeter-wave radar detection signals, guaranteeing accurate target acquisition by the radar; however, it avoids structural bulkiness and inconvenient installation and adjustment due to excessively large plate sizes.

[0020] Example 4 like Figure 1-3 As shown, this embodiment is based on Embodiment 1, and the flatness of the inner side of the corner reflector is ≤0.01mm to ensure the intensity of the echo.

[0021] Example 5 like Figure 1-3 As shown, this embodiment is based on Embodiment 1. The three isosceles right-angled plates 1 are fixed together in pairs by welding, and the welds are located on the outside of the corner reflector. This is to avoid interference from the welds to the millimeter waves.

[0022] Example 6 like Figure 1-3 As shown, this embodiment is based on the first embodiment. The arc-shaped groove 5 is concentrically arranged with the mating hole 4, and the arc-shaped groove 5 is farther away from the turntable 2 than the mating hole 4.

[0023] The above description of the embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A target structure based on a 4D millimeter-wave slope monitoring radar system, characterized in that, include: The corner reflector comprises three isosceles right-angled plates (1), which are perpendicular to each other. A dual-degree-of-freedom adjustment joint includes a turntable (2) and two adjustment plates (3). The two adjustment plates (3) are symmetrically arranged at the bottom of the turntable (2). The adjustment plates (3) are provided with mating holes (4) and arc-shaped sliding grooves (5). A connecting rod (6) is shaped like a >, with one end fixed to the bottom of one of the isosceles right-angled plates (1), and the other end provided with a rotating shaft (7) and a sliding member (8). The two ends of the rotating shaft (7) are respectively inserted into a mating hole (4), and the sliding member (8) is slidably connected in the arc-shaped groove (5).

2. The target structure of the 4D millimeter-wave slope monitoring radar system according to claim 1, characterized in that: The upper surface of the turntable (2) is provided with several positioning holes (9) circumferentially along the center.

3. The target structure of the 4D millimeter-wave slope monitoring radar system according to claim 1, characterized in that: The isosceles right-angled plate (1) has a waist length of 30cm, a bottom length of 42.4cm, and a thickness of 2mm.

4. The target structure of the 4D millimeter-wave slope monitoring radar system according to claim 1, characterized in that: The flatness of the inner side of the corner reflector is ≤0.01mm.

5. The target structure of the 4D millimeter-wave slope monitoring radar system according to claim 1, characterized in that: The three isosceles right-angled plates (1) are fixed together by welding, and the weld is located on the outside of the corner reflector.

6. The target structure of the 4D millimeter-wave slope monitoring radar system according to claim 1, characterized in that: The arc-shaped groove (5) is concentrically arranged with the mating hole (4), and the arc-shaped groove (5) is farther away from the turntable (2) than the mating hole (4).

Images