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Modular multifunctional test fixture in free space method

A technology of free space and test fixtures, applied in the direction of measuring devices, measuring electrical variables, measuring device casings, etc., can solve problems such as lack of suitable fixtures, and achieve the effect of preventing reflection interference

Inactive Publication Date: 2018-07-20
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the ubiquitous problem that there is no suitable fixture for testing the electromagnetic parameters of powdery or granular materials by the free space method, the present invention provides a multifunctional modular fixture specially designed for testing the electromagnetic parameters of powdery or granular materials by the free space method. Can flexibly use different module combinations to meet the needs of various calibration and testing methods

Method used

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  • Modular multifunctional test fixture in free space method
  • Modular multifunctional test fixture in free space method
  • Modular multifunctional test fixture in free space method

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Embodiment 1

[0035] This embodiment provides a modular multifunctional free space method test fixture, which is specially designed for the transmission method to test the electromagnetic parameters of powdery or granular materials; Figure 1-2 As shown, the included fixture includes:

[0036] 1) The antenna base plate 3 is provided with grooves parallel to each other on the antenna base plate 3; specifically: on both sides of the sample box support 2, two parallel grooves 8 are respectively set, and marked on the grooves Scale; on both sides of the antenna bottom plate, there are bracket holes 9 for inserting the sample box bracket 2;

[0037] 2) Antenna base 4; the antenna base includes a first antenna base and a second antenna base which are respectively arranged on both sides of the antenna base plate; in the present embodiment, two test antennas 5 are respectively fixed on the first antenna base base and the upper part of the second antenna base. A slide rail corresponding to the gro...

Embodiment 2

[0046] This embodiment provides a modular multifunctional free space method test fixture, which is specially designed for the reflection method to test the electromagnetic parameters of powdery or granular materials; image 3 As shown, the fixture includes: antenna base plate 3, antenna base 4, sample box support 2, sample box 1 fixed on the sample box support, and a test antenna 5 fixedly arranged on the antenna base 4;

[0047] The test fixture also includes a calibration base 11; the antenna base 4 is fixedly arranged on one end of the antenna base; the calibration base 11 is arranged on the other end of the antenna base; the sample box support 2 It is arranged on the calibration base 11; the calibration base is designed to meet the requirement that the antenna position cannot be moved during reflection method calibration. Both sides of the calibration base 11 also respectively have a support hole for inserting the sample box support 2 .

[0048] A groove is provided on th...

Embodiment 3

[0059] This embodiment is basically the same as Embodiment 1, the only difference is that, as Figure 5 Said, the fixture also includes a vertical base, when the powdery or granular sample to be measured is not suitable for vertical placement, the antenna bottom plate is vertically inserted into the vertical base, so as to realize the conversion of the sample box from vertical placement to horizontal placement . The clamps provided in Embodiments 1 and 2 are suitable for the situation where the antenna 5 is placed horizontally and the sample box 1 is placed vertically. This placement is convenient for adjusting the distance between the antenna and the sample and is easy to operate. However, sometimes powdery or granular samples are not suitable for vertical placement. For this reason, a special vertical base 12 is designed in this embodiment. Only the antenna base plate is inserted into the vertical base 12, and it is conveniently converted into a sample. Box 1 is placed hori...

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Abstract

The invention mainly belongs to the field of devices used for testing electromagnetic parameters of a powdery or granular material, and particularly relates to a modular multifunctional test fixture in a free space method. The fixture is an additional device which is capable of helping the free space method to reliably, stably and accurately test the electromagnetic parameters of the powdery or granular material. The fixture comprises an antenna bottom plate, an antenna base, a sample cartridge holder, and a sample cartridge fixed on the sample cartridge holder. The sample cartridge is in theshape of a flat plate, so that a powdery or granular sample to be tested is constrained to be forcibly formed. The sample cartridge shaped like a flat plate changes the current situation that the powdery or granular material which is formless does not meet the requirement of a test condition. The powdery or granular material which is formless is changed into a shape with controllable size and thickness. The test requirement is satisfied, and at the same time steps are simplified. The fixture has the advantages of convenient operation and improved efficiency.

Description

technical field [0001] The invention mainly belongs to the field of devices for testing electromagnetic parameters of powdery or granular materials, and specifically relates to a modular multifunctional free-space method test fixture, which is a device that helps the free-space method to reliably, stably and accurately test powdery or granular materials Additional equipment for electromagnetic parameters. Background technique [0002] In the research and application of modern materials, it is often necessary to test the electromagnetic parameters of powdery or granular materials. Among many testing methods, the free-space method is often used to measure electromagnetic parameters of flat-shaped materials due to its advantages of non-contact, non-destructive and no processing requirements for the tested material. However, the particularity of the radio frequency band has higher requirements on the flatness, size, thickness, etc. of the sample to be tested. Usually, special a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R1/04
CPCG01R1/0425
Inventor 牛玉广彭范葛维春邱天杜鸣李斌孙亮李昌松罗桓桓吴南张田婷
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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