A device and method for testing the shielding effectiveness of electromagnetic shielding fabric
A technology of shielding effectiveness and electromagnetic shielding, applied in the direction of measuring device, measuring device casing, measuring electricity, etc., can solve the problems of difficulty in ensuring the convenience and reliability of test results, difficulty in correctly and reasonably evaluating the shielding performance of electromagnetic shielding fabrics, and high cost. , to achieve the effect of simple and fast test operation, accurate and reliable test results, and small equipment investment
Inactive Publication Date: 2014-10-22
ZHONGYUAN ENGINEERING COLLEGE
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Problems solved by technology
However, so far, there has not been a device for quickly and accurately measuring the shielding effectiveness of electromagnetic shielding fabrics, making it difficult to correctly and reasonably evaluate the shielding performance of electromagnetic shielding fabrics in actual production, research and sales.
Some existing test methods are expensive, and the test conditions such as airtightness and frequency breadth are relatively limited, and it is difficult to guarantee the convenience and reliability of the test results.
Method used
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Embodiment Construction
[0021] Such as figure 1 As shown, a device for testing the shielding effectiveness of electromagnetic shielding fabrics includes a shielding box, a signal transmitting device, a signal receiving device and a fabric holding clip.
[0022] The shielding box is a cuboid made of an extremely smooth metal shielding plate inside. The length is 20cm-300cm, the height is 20cm-120cm, the width is 20cm-120cm, and the thickness of the metal shielding plate is 0.1cm-3.5cm. The front and rear ends of the shielding box are respectively equipped with a front airtight door 1 and a rear airtight door 11 through which wires can pass, and the front and rear airtight doors are respectively connected with the shielding box through loose leaves. Such as Figure 5 , 6 , 7, the structure of the front and rear airtight doors is the same, the outside of the front and back airtight doors has a handle 23, and the inner surface is provided with a protrusion 22, and the protrusion 22 matches the inner di...
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A device for testing shielding effectiveness of electromagnetic shielding fabric comprises a shielding box, a signal transmitting device, a signal receiving device and a fabric holder. The shielding box is manufactured by a metal shielding plate with a smooth inner portion. A front sealing door and a back sealing door used for a wire to pass are arranged at the front end and the back end of the shielding box respectively, and a shielding frame and the fabric holder are arranged in the shielding box. The signal transmitting device is mainly composed of a signal generator, a transmission antenna and a transmission support. The signal receiving device is mainly composed of a signal receiver, a network analyzer and a receiving support. The device and the method are simple and quick in testing operation and capable of testing shielding effectiveness of the electromagnetic shielding fabric. The device is accurate and reliable in testing result and capable of well evaluating shielding performance of the electromagnetic shielding fabric. An inner and outer hole wire leading method increases closeness of the shielding box, positions of the signal transmission antenna and the signal receiver are convenient to adjust, testing universality is increased, matching of the shielding frame and the fabric holder enables testing to be accurate.
Description
technical field [0001] The invention belongs to the intercrossing technical fields of textile and clothing science and electromagnetics, and relates to a testing device and method for the shielding effectiveness of electromagnetic shielding fabrics. Background technique [0002] Electromagnetic shielding fabrics, also known as anti-electromagnetic radiation fabrics, can be used to make flexible shields of various shapes, anti-electromagnetic radiation clothing, and substrates of shielding composite materials. It has a wide range of applications in health protection and other fields. Therefore, electromagnetic shielding fabrics are getting more and more attention, and its related technologies are developing rapidly. [0003] Shielding effectiveness is a key indicator for evaluating electromagnetic shielding fabrics. However, so far, there has not been a device for quickly and accurately measuring the shielding effectiveness of electromagnetic shielding fabrics, which makes ...
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
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IPC IPC(8): G01R31/00G01R1/04
Inventor 刘哲汪秀琛
Owner ZHONGYUAN ENGINEERING COLLEGE
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