CN110244283A - A Radar Calibration System That Can Track Along the Strong Scattering Direction - Google Patents

Abstract

The radar calibration system that can track along the direction of strong scattering includes a bracket. The top of the bracket is equipped with a mounting platform. The top of the mounting platform is equipped with a universal adjuster. The corner reflector mounting bracket is installed on the guide rail through the linear guide rail slider. The corner reflector is installed on the corner reflector mounting bracket. A laser emitter that can emit visible light is installed in the cavity of the corner reflector. The laser emitter emits The outgoing light is emitted along the center of the corner reflector's mouth surface and is perpendicular to the corner reflector's mouth surface. Its purpose is to provide a way to adjust the moving direction of the slope radar corner reflector through visible laser to ensure that the movement of the corner reflector is along the direction of the radar line of sight, improve the accuracy of the slope radar accuracy verification, and then quickly detect the slope radar A radar calibration system that can track along the direction of strong scattering for precision calibration.

Description

A Radar Calibration System That Can Track Along the Strong Scattering Direction

technical field

The invention relates to a radar calibration system capable of tracking along the strong scattering direction.

Background technique

With the development of radar technology, ground-based synthetic aperture radar has been widely used in the field of slope monitoring, and the application effect has also been recognized by the industry. At the same time, due to the all-weather, long-distance and non-contact monitoring The ground-based synthetic aperture radar monitoring technology will gradually replace traditional monitoring technologies such as GPS and strain gauges, and the market prospect is broad. However, there is no uniform standard for verifying radar accuracy in the market. At present, most of them use corner reflectors on slopes as targets to verify the accuracy of radar data. When deploying corner reflectors, corner reflectors are required. The direction is towards the direction of the radar wave in order to obtain the strong point of the radar in the imaging map. Since the deformation measured by the radar is the deformation along the direction of the radar line of sight, when using the corner reflector for radar data calibration, it is necessary to ensure that the corner reflector moves The direction is the direction of the radar line of sight. However, due to the invisibility of electromagnetic waves, there is currently no effective way to ensure that the corner reflector faces the direction of the radar wave, and it is impossible to ensure that the moving direction of the corner reflector is along the strong scattering direction of the radar wave. Based on the above problems, according to the linear propagation characteristics of electromagnetic waves and light, we invented a radar calibration system that can track along the strong scattering direction. The system adjusts the direction by emitting visible laser light, and can accurately and quickly locate the moving direction of the corner reflector to the direction of radar wave intensity scattering.

Contents of the invention

The purpose of the present invention is to provide a method to adjust the moving direction of the slope radar corner reflector through the visible laser according to the linear propagation characteristics of electromagnetic waves and light, so as to ensure that the movement of the corner reflector is along the radar line of sight direction, and improve the accuracy verification of the slope radar Accuracy, and then the accuracy calibration of the slope radar can be quickly performed to verify whether the accuracy of the radar monitoring data meets the requirements of the radar calibration system that can track along the strong scattering direction.

The radar calibration system capable of tracking along the strong scattering direction of the present invention comprises a bracket, the top of the bracket is provided with a mounting platform, the top of the mounting platform is equipped with a universal adjuster, and the top of the universal adjuster is provided with a high-precision linear guide rail, The high-precision linear guide can make the high-precision linear guide rotate along the horizontal direction or rotate along the vertical direction by adjusting the universal adjuster;

The high-precision linear guide rail is installed with a corner reflector mounting bracket through the linear guide rail slider. The corner reflector mounting bracket can reciprocate along the high-precision linear guide rail under the drive of the motor. The corner reflector mounting bracket is installed with Corner reflector, the corner reflector is spliced by 3 isosceles triangular metal plates to form a regular triangular pyramid. High-precision linear guide rail, the cavity of the corner reflector is installed with a laser emitter that can emit visible light, and the light emitted by the laser emitter is emitted along the center of the corner reflector's mouth surface and perpendicular to the corner reflector's mouth surface .

Preferably, the support is a tripod support.

Preferably, the corner reflector is made of three isosceles triangular aluminum alloy plates or steel plates.

Preferably, the length of the bottom edge is also 600mm.

Preferably, the high-precision linear guide rail can rotate 360° along the horizontal direction and rotate 180° vertically.

Preferably, the positioning accuracy of the high-precision linear guide is 0.1 mm.

The radar calibration system capable of tracking along the strong scattering direction of the present invention starts the motor to allow the displacement of the corner reflector along the high-precision linear guide rail. When in use, use a laser transmitter that can emit visible light to emit a laser, such as a red laser, and then use the red laser to adjust the moving direction of the slope radar corner reflector, thereby ensuring the corner reflector. Movement is along the radar line-of-sight direction to improve slope radar accuracy verification accuracy. Therefore, the radar calibration system capable of tracking along the strong scattering direction of the present invention has the ability to adjust the moving direction of the slope radar corner reflector through the visible laser, to ensure that the movement of the corner reflector is along the radar line of sight direction, and to improve the slope radar accuracy. Verify the accuracy, and then quickly calibrate the accuracy of the slope radar to verify whether the accuracy of the radar monitoring data meets the required characteristics.

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

Description of drawings

Fig. 1 is the front view of the structural schematic diagram of the radar calibration system capable of tracking along the strong scattering direction of the present invention;

Fig. 2 is the side view of Fig. 1;

FIG. 3 is a top view of FIG. 1 .

Detailed ways

As shown in Fig. 1, Fig. 2 and Fig. 3, the radar calibration system capable of tracking along the strong scattering direction of the present invention includes a bracket 1, the top of the bracket 1 is provided with an installation platform 2, and the top of the installation platform 2 is equipped with a universal The top of the regulator 3 and the universal regulator 3 is provided with a high-precision linear guide 4, and the high-precision linear guide 4 can be adjusted by adjusting the universal regulator 3 to make the high-precision linear guide 4 rotate along the horizontal direction, or along the Rotate in the vertical direction;

The high-precision linear guide rail 4 is installed with a corner reflector mounting bracket 9 through the linear guide rail slider, and the corner reflector mounting bracket 9 can reciprocate along the high-precision linear guide rail 4 under the drive of the motor 5, and the corner reflector Corner reflector 6 is installed on the mounting bracket 9, and corner reflector 6 forms a regular triangular pyramid by splicing metal plates of 3 isosceles triangles, and the plane where three bases 7 of regular triangular pyramid are located constitutes the mouth of corner reflector 6 The surface of the corner reflector 6 is perpendicular to the high-precision linear guide rail 4. A laser transmitter 8 that can emit visible light is installed in the cavity of the corner reflector 6. The light emitted by the laser transmitter 8 travels along the direction of the corner reflector. The center of the face of the corner reflector 6 emerges and is perpendicular to the face of the corner reflector 6 .

Let the light source emitted by the laser 6 be parallel to the high-precision linear guide rail 4, so that after the angle of the corner reflector 6 is adjusted through the light source, the moving distance of the corner reflector 6 is along the direction of the radar line of sight.

The above-mentioned corner reflector 6 is also called a radar reflector, and it is a radar wave reflector of different specifications made from metal plates according to different purposes. When the radar electromagnetic wave scans to the corner reflection, the electromagnetic wave will be refracted and amplified on the metal corner to generate a strong echo signal, and a strong echo target will appear on the radar screen.

As a further improvement of the present invention, the above-mentioned support 1 is a tripod-shaped support.

As a further improvement of the present invention, the above-mentioned corner reflector 6 is made of three isosceles triangular aluminum alloy plates or steel plates. When the incident angle changes, the corner reflector with triangular facets can obtain greater echo power in a larger angle range.

As a further improvement of the present invention, the length of the bottom edge 7 is also 600mm.

As a further improvement of the present invention, the above-mentioned high-precision linear guide rail 4 can rotate 360° in the horizontal direction and 180° in the vertical direction.

As a further improvement of the present invention, the positioning accuracy of the above-mentioned high-precision linear guide rail 4 is 0.1 mm. The corner reflector 6 can be displaced on the order of 0.1 mm along the high-precision linear guide rail 4 .

Due to the invisible characteristics of electromagnetic waves, we cannot guarantee that the direction of movement of the corner reflector is along the direction of the radar line of sight, and it is impossible to accurately calibrate whether the deformation value in the direction of the radar line of sight is accurate. The characteristics of the corner reflector 6 are creatively added a laser emitter 8 that can emit visible light. By emitting a visible light laser beam, the moving direction of the corner reflector 6 can be easily adjusted to the direction of the radar line of sight.

The radar calibration system capable of tracking along the strong scattering direction of the present invention starts the motor 5 and allows the corner reflector 6 to make a displacement of the order of 0.1 mm along the high-precision linear guide rail 4 . When in use, utilize the laser transmitter 8 that can emit visible light to send out a laser, such as a red laser, and then use this as a basis to adjust the moving direction of the slope radar corner reflector through the red laser, thereby ensuring that the corner reflector The movement is along the radar line-of-sight direction to improve slope radar accuracy verification accuracy. Therefore, the radar calibration system that can trace along the strong scattering direction of the present invention has the ability to adjust the moving direction of the corner reflector 6 by visible laser light to ensure that the movement of the corner reflector 6 is along the radar line of sight direction, so as to improve the slope radar Accuracy verifies the accuracy, and then quickly calibrates the accuracy of the slope radar to verify whether the accuracy of the radar monitoring data meets the requirements.

The above-mentioned embodiments are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, ordinary engineers and technicians in the field may make various modifications to the technical solutions of the present invention. and improvements, all should fall within the scope of protection determined by the claims of the present invention.

Claims (6)

1. A radar calibration system capable of tracking along the direction of strong scattering, characterized by: including a bracket (1), the top of the bracket (1) is provided with a mounting platform (2), and the top of the mounting platform (2) is equipped with a universal adjustment There is a high-precision linear guide (4) on the top of the universal adjuster (3), and the high-precision linear guide (4) can rotate along the horizontal direction by adjusting the universal adjuster (3). , or rotate along the vertical direction; The high-precision linear guide rail (4) is installed with a corner reflector mounting bracket (9) through the linear guide rail slider, and the corner reflector mounting bracket (9) can be driven by the motor (5) along the high-precision linear guide rail (4) do reciprocating motion, the corner reflector (6) is installed on the corner reflector mounting bracket (9), and the corner reflector (6) forms a regular triangular pyramid by splicing metal plates of 3 isosceles triangles, regular triangular pyramid The planes where the three bases (7) of the corner reflector (6) are located form the mouth surface of the corner reflector (6), the mouth surface of the corner reflector (6) is perpendicular to the high-precision linear guide rail (4), and the cavity of the corner reflector (6) A laser transmitter (8) capable of emitting visible light is installed inside, and the light emitted by the laser transmitter (8) is emitted along the center of the mouth surface of the corner reflector (6) and is perpendicular to the mouth of the corner reflector (6). noodle. 2. The radar calibration system capable of tracking along strong scattering directions according to claim 1, characterized in that: the support (1) is a tripod support. 3. The radar calibration system capable of tracking along the strong scattering direction according to claim 2, characterized in that: the corner reflector (6) is made of three isosceles triangular aluminum alloy plates or steel plates. 4. The radar calibration system capable of tracking along strong scattering directions according to claim 3, characterized in that: the lengths of the bottom sides (7) are both 600 mm. 5. The radar calibration system capable of tracking along the strong scattering direction according to any one of claims 1 to 4, characterized in that: the high-precision linear guide rail (4) can rotate 360° along the horizontal direction Movement, can do 180°rotational movement along the vertical direction. 6. The radar calibration system capable of tracking along strong scattering directions according to claim 5, characterized in that: the positioning accuracy of the high-precision linear guide rail (4) is 0.1mm.