Wave-absorbing baffle device for millimeter wave radar microwave darkroom test

Abstract

The utility model relates to a wave absorbing baffle device used for millimeter wave radar anechoic chamber test, which comprises an arc-shaped track, a sliding block base and a vertical supporting rod, the arc-shaped track is in a semi-arc shape, the sliding block base is installed on the arc-shaped track in a sliding mode, the vertical supporting rod is installed on the sliding block base, and the vertical supporting rod is connected with the sliding block base. A pyramid wave-absorbing baffle is installed on the side, close to the circle center of the arc-shaped track, of the upper end of the vertical supporting rod. The utility model has the characteristics that the darkroom quiet zone performance is increased, the measurement error caused by multi-path reflection is improved, and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to millimeter wave radar test technical field especially a kind of wave-absorbing baffle device for millimeter wave radar microwave darkroom test. BACKGROUND

[0002] The common millimeter wave radar darkroom currently is pasted on the inner wall six faces of shielding box with corner wave-absorbing material, shielding box is made of metal itself, can bring more remarkable mirror surface reflection, corner wave-absorbing material is generally vertically absorbed according to the manufacturing process and material of vendor-40dB to-55dB, for high gain antenna, cannot be completely absorbed mirror surface reflection, absorption rate will be further reduced under non-vertical state, especially mirror surface reflection point energy is strong, cannot accurately determine radar sidelobe, to solve the above problem, need to increase a wave-absorbing baffle device, to block mirror surface reflection. SUMMARY

[0003] The utility model provides a kind of wave-absorbing baffle device for millimeter wave radar microwave darkroom test, with increase darkroom quiet zone performance, improve the characteristics such as the measurement error caused by multipath reflection.

[0004] The utility model discloses a kind of wave-absorbing baffle device for millimeter wave radar microwave darkroom test, including arc track, sliding block base and vertical support, the arc track is semicircular arc, the sliding block base is slidably installed on the arc track, vertical support is installed on the sliding block base, the vertical support upper end is installed with corner wave-absorbing baffle near the arc track center.

[0005] In the technical solution, an arc track is designed to facilitate the movement of the sliding block base, allowing the position of the corner wave-absorbing baffle to be adjusted. The corner wave-absorbing baffle is installed to block the mirror surface reflection inside the darkroom, improving the accuracy of the measurement and reducing the measurement error caused by mirror surface reflection.

[0006] As a supplement to the technical solution, a sliding groove structure is provided on the upper side of the arc track, and a sliding block protrusion is provided on the lower part of the sliding block base to fit into the sliding groove structure. The sliding groove structure and the sliding block protrusion are designed to limit the sliding track of the sliding block base, ensuring smooth sliding.

[0007] As a supplement to the technical solution, an inner recess is provided on the lower end surface of the sliding block base, close to the outer curved side of the arc track. A guide wheel is installed in the inner recess, arranged horizontally. The guide wheel is in contact with the outer curved side of the arc track. In the technical solution, the guide wheel is installed to improve the running stability of the sliding block base.

[0008] As a supplement to the technical scheme, the inner recess gap is vertically provided with a guide wheel mounting shaft, two guide wheels are installed on the guide wheel mounting shaft in parallel, and the two guide wheels are used to improve the operation stability.

[0009] As a supplement to the technical scheme, the guide wheel mounting shaft is provided with a limiting table at the upper portion, the guide wheel mounting shaft is provided with a gland at the lower end, and the gland and the limiting table limit the two guide wheels, and the position of the guide wheel is further limited by the gland and the limiting table.

[0010] As a supplement to the technical scheme, the gland is connected with the guide wheel mounting shaft through a screw, and a stabilizing shaft sleeve is arranged between the two guide wheels.

[0011] As a supplement to the technical scheme, the arc-shaped track is provided with an angle scale, and the angle scale is used to intuitively reflect the specific position of the corner wave-absorbing baffle.

[0012] Beneficial effects: the utility model relates to a wave-absorbing baffle device for millimeter wave radar microwave anechoic chamber test, an arc-shaped track is designed to facilitate the movement of the slider base, so that the position of the corner wave-absorbing baffle can be adjusted, the corner wave-absorbing baffle is installed to block the mirror surface of the anechoic chamber, the measurement accuracy is improved, the measurement error caused by mirror reflection is reduced, and the anechoic chamber has the characteristics of increasing the anechoic chamber static zone performance, improving the measurement error caused by multipath reflection and the like. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the top view of the utility model;

[0014] Figure 2 It is the top view of the utility model Figure 1 A-A direction section view in the utility model;

[0015] Figure 3 It is the structure diagram in the application process of the utility model.

[0016] Illustration: 1, radar turntable to be measured, 2, wave-absorbing baffle device, 3, anechoic chamber metal wall, 4, receiving antenna, 5, plane wave propagation path, 6, mirror surface reflection propagation path, 7, arc-shaped track, 8, sliding groove structure, 9, slider base, 10, vertical support rod, 11, corner wave-absorbing baffle, 12, slider protrusion, 13, inner recess gap, 14, guide wheel mounting shaft, 15, guide wheel, 16, stabilizing shaft sleeve, 17, gland, 18, screw. DETAILED DESCRIPTION

[0017] The utility model discloses further illustrate below in conjunction with specific embodiment. It is understood that these embodiments are only for illustrating the utility model and are not for limiting the scope of the utility model. In addition, it is understood that after reading the content taught by the utility model, the person skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0018] The embodiment of the utility model relates to a kind of wave-absorbing baffle device for millimeter wave radar microwave darkroom test, such as Figure 1 As shown in 2, including arc track 7, slider base 9 and vertical support 10, the arc track 7 is semicircular, the slider base 9 is slidably installed on the arc track 7, the vertical support 10 is installed on the slider base 9, and the vertical support 10 is installed with the corner wave-absorbing baffle 11 on the upper end near the arc track 7.

[0019] In the technical solution, an arc track 7 is designed to facilitate the movement of the slider base 9, so that the position of the corner wave-absorbing baffle 11 can be adjusted. The corner wave-absorbing baffle 11 is installed to block the mirror surface inside the darkroom, which improves the accuracy of measurement and reduces the measurement error caused by mirror reflection.

[0020] As a supplement to the technical solution, the upper side of the arc track 7 is provided with a sliding groove structure 8, and the lower part of the slider base 9 is provided with a slider protrusion 12 that fits into the sliding groove structure 8. The sliding track of the slider base 9 is limited by designing the sliding groove structure 8 and the slider protrusion 12, ensuring smooth sliding.

[0021] As a supplement to the technical solution, the lower end face of the slider base 9 is provided with an inner recess 13 near the outer curved side of the arc track 7, and a guide wheel 15 is installed in the inner recess 13 in a transverse arrangement. The guide wheel 15 contacts the outer curved side of the arc track 7. In the technical solution, the guide wheel 15 is installed to improve the running stability of the slider base 9.

[0022] As a supplement to the technical solution, a guide wheel mounting shaft 14 is vertically installed on the inner recess 13, and two guide wheels 15 are installed on the guide wheel mounting shaft 14 in an up-down and side-by-side arrangement. The two guide wheels 15 are arranged to improve the running stability of the guide wheel 15.

[0023] As a supplement to the technical solution, a limit table is provided on the upper part of the guide wheel mounting shaft 14, and a gland 17 is installed on the lower end of the guide wheel mounting shaft 14. The gland 17 and the limit table limit the two guide wheels 15. The position of the guide wheel 15 is further limited by providing the gland 17 and the limit table.

[0024] As a supplement to this technical solution, the pressure cap 17 is connected to the guide wheel mounting shaft 14 by screws 18, and a stabilizing bushing 16 is provided between the two guide wheels 15.

[0025] As a supplement to this technical solution, the arc-shaped track 7 is provided with an angle scale. By setting the angle scale, the specific position of the cone-shaped wave-absorbing baffle 11 can be intuitively shown.

[0026] Example

[0027] When this device is used for anechoic chamber testing, such as Figure 3 As shown, the exterior of the anechoic chamber is made of anechoic chamber metal wall 3, and the inner side of the anechoic chamber metal wall 3 is provided with pyramidal absorbing material. The radar turntable 1 under test is installed at one end of the anechoic chamber, and the receiving antenna 4 is installed at the other end. The radar turntable 1 under test is equipped with a wave-absorbing baffle device 2 on the side close to the receiving antenna 4. The wave-absorbing baffle device 2 is the structure described in this technical solution. When installed, the arc track 7 is semi-circular, and its center position coincides with the position of the radar turntable 1 under test.

[0028] During operation, the radar under test is installed on the radar under test turntable 1. The radar under test turntable 1 is rotated so that the radar under test faces the receiving antenna 4. Then, the influence of specular reflection needs to be eliminated. The straight distance between the radar under test and the receiving antenna 4 is the plane wave propagation path 5, and the path formed by the wave emitted by the radar under test after being reflected by the metal wall 3 of the dark room and shining on the receiving antenna 4 is the specular reflection propagation path 6.

[0029] By sliding the slider base 9, the cone-shaped wave-absorbing baffle 11 can block the mirror reflection propagation path 6, thereby ensuring the accuracy of the test.

Claims

1. A wave-absorbing baffle device for millimeter wave radar microwave anechoic chamber testing, characterized in that: Including arc track (7), slider base (9) and vertical support pole (10), the arc track (7) is semicircular arc, the slider base (9) is slidably installed on the arc track (7), the vertical support pole (10) is installed on the slider base (9), and the angle pyramid wave-absorbing baffle (11) is installed on the upper end of the vertical support pole (10) near the center of the arc track (7).

2. The wave-absorbing baffle device for millimeter wave radar microwave darkroom test according to claim 1, characterized in that: The upper side of the arc track (7) is provided with a sliding groove structure (8), and the lower part of the slider base (9) is provided with a slider protrusion (12) clamped into the sliding groove structure (8).

3. The wave-absorbing baffle device for millimeter wave radar microwave darkroom test according to claim 1, characterized in that: The lower end surface of the slider base (9) is provided with an inner recess (13) near the outer curved side of the arc track (7), the inner recess (13) is provided with a transversely arranged guide wheel (15), and the guide wheel (15) is in contact with the outer curved side of the arc track (7).

4. The wave-absorbing baffle device for millimeter wave radar microwave darkroom test according to claim 3, characterized in that: The inner recess (13) is vertically provided with a guide wheel mounting shaft (14), and the guide wheel mounting shaft (14) is provided with two guide wheels (15) arranged side by side.

5. The wave-absorbing baffle device for millimeter wave radar microwave darkroom test according to claim 4, characterized in that: The upper part of the guide wheel mounting shaft (14) is provided with a limiting table, the lower end of the guide wheel mounting shaft (14) is provided with a gland (17), and the gland (17) and the limiting table limit the two guide wheels (15).

6. The wave-absorbing baffle device for millimeter wave radar microwave darkroom test according to claim 5, characterized in that: The gland (17) is connected to the guide wheel mounting shaft (14) by a screw (18), and a stabilizing shaft sleeve (16) is arranged between the two guide wheels (15).

7. The wave-absorbing baffle device for millimeter wave radar microwave darkroom test according to claim 1, characterized in that: The arc track (7) is provided with an angle scale.

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