A flat plate positioning device for absorbing material without echo scattering
A wave-absorbing material and positioning device technology, applied in radio wave measurement systems, instruments, etc., can solve the problems of support structure echo interference, test accuracy impact, difficult angle error, etc., to avoid deformation, improve test reflectivity and RCS The effect of testing accuracy and reducing background clutter
Active Publication Date: 2018-04-10
BEIJING RES INST OF MECHANICAL & ELECTRICAL TECH
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
If the lower support mechanism is not used, and metal fasteners are used behind the metal plate, the back of each plate for testing needs to be processed into grooves or screw holes, and the cost of implementation is too high
[0005] It can be seen that for the reflectivity test plate with regular shape, the existing test methods are difficult to have angle error or support structure echo interference, which affects the test accuracy to a certain extent
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0026] Such as Figure 1-2 As shown, a non-echo-scattering wave-absorbing material plate positioning device is composed of a metal part 3, a silicone ring 2 and an air extraction valve 4. One side of the metal part 3 is a plane 7, and on the side of the plane 7 there is Annular groove 6; the inner side of the silicone ring 2 is embedded in the annular groove 6 of the metal part 3, and the outer side of the silicone ring 2 is inclined to the side of the plane 7; a through hole is opened near the center position 5 of the plane area of the metal part 3, and the hole is installed There is an air extraction valve 4, and the air extraction valve 4 and the through-hole wall are bonded together with a sealant, and a fastening mechanism is installed on one side of the metal part 3, and is fixed together with the metal base. A plastic pipe 8 and an air suction pump are connected behind the exhaust valve 4. When the air pump works, the air near the center of the metal part 5 is extract...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention belongs to the technical field of radar stealth material electrical performance tests, and particularly relates to a wave-absorbing material flat plate positioning device without echo scattering. The wave-absorbing material flat plate positioning device is composed of a metal piece (3), a silicone ring (2) and an air extraction valve (4), wherein one surface of the metal piece (3) is a plane (7), and an annular groove (6) is formed in the side surface of the plane (7); the inner side of the silicone ring (2) is embedded in the annular groove (6), and the outer side of the silicone ring (2) inclines toward one side of the plane (7); and a through hole is formed near a planar region centroid position of the metal piece (3), the air extraction valve (4) is installed in the through hole, and the air extraction valve (4) is adhered with the hole wall of the through hole by adopting a sealant. The wave-absorbing material flat plate positioning device without echo scattering can be installed on a low-scattering turntable in an RCS test darkroom, significantly reduces background clutter caused by the existence of a supporting mechanism, is suitable for reflectivity tests and RCS tests of various kinds of wave-absorbing flat plate parts, and significantly increases test reflectivity and RCS test precision without increasing flat plate part manufacturing cost.
Description
technical field [0001] The invention belongs to the technical field of electrical performance testing of radar stealth materials, and in particular relates to a plate positioning device for wave-absorbing materials without echo scattering. Background technique [0002] The application of absorbing materials on the outer surface of military aircraft is an important means to reduce the radar echo of various aircraft and improve the stealth performance. The reflectivity index is the main technical index to describe the absorbing performance of the absorbing material. [0003] In GJB2038A, two commonly used methods for testing the reflectivity of absorbing materials are given. One is the bow-shaped frame method. The main method is to place the wave-absorbing material horizontally on the bracket, and fix the receiving and transmitting antennas at different positions on the bow-shaped frame. superior. In this method, the measured wave-absorbing material is relatively close to th...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/40
CPCG01S7/40
Inventor 张松靖黄兴军郑理
Owner BEIJING RES INST OF MECHANICAL & ELECTRICAL TECH