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Anti-electromagnetic interference image monitoring device

An anti-electromagnetic interference and monitoring device technology, applied in TV, color TV, image communication, etc., can solve the problems of high cost, test electromagnetic field uniform disturbance, large volume, etc., to improve data accuracy and test uniform electromagnetic field disturbance Small, small effect of electromagnetic field disturbance

Pending Publication Date: 2021-06-01
SHANGHAI INST OF MEASUREMENT & TESTING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, video surveillance cameras dedicated to EMC tests usually require multiple EMC designs such as metal electromagnetic shielding shells and internal circuit filtering, so they are bulky and expensive
At the same time, the metal camera is easy to disturb the uniformity of the test electromagnetic field, so it is difficult to monitor the DUT at close range and from multiple angles
Moreover, in the high-intensity test field strength under some conditions, the video surveillance camera dedicated to the electromagnetic compatibility test will also be affected by electromagnetic interference and produce an abnormal video display interface with water ripples, which has a great impact on the accurate judgment of the test results

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] An image monitoring device with anti-electromagnetic interference disclosed in this embodiment, such as figure 1 As shown, it includes an optical imaging system 1, an image transmission fiber bundle 2 and an image analysis host 3;

[0024] The optical imaging system 1 includes an imaging lens, which is used to efficiently couple the sample to be tested into the imaging end of the image transmission fiber bundle 2;

[0025] The optical imaging system 1 is made of an integral non-metallic material, and its interior is mainly made of glass material, and its outer shell is made of plastic material, in order to avoid disturbance to the uniform electromagnetic field in the test, and to avoid the influence of strong electromagnetic interference;

[0026] The image-transmitting optical fiber bundle 2 is a commercial optical fiber bundle, and is used to transmit the image elements with different brightness on the imaging end face to the image analysis host.

[0027] Preferably,...

Embodiment 2

[0038] Based on the anti-electromagnetic interference image monitoring device of the first embodiment, such as figure 2 Shown is a schematic structural diagram of an embodiment of the optical imaging system 1 , which mainly includes an optical imaging lens 6 and a diaphragm 7 .

[0039] The optical imaging lens 6 images the sample 8 to be tested on the imaging end face 9 of the imaging fiber bundle 2 .

[0040] The diaphragm 7 is a traditional diaphragm structure, which can be opened or reduced to improve the quality of the image.

Embodiment 3

[0042] Based on the anti-electromagnetic interference image monitoring device of the first embodiment, such as image 3 Shown is a schematic structural diagram of an embodiment of the image analysis host 3 , which mainly includes a fiber bundle interface 10 , a focusing lens 11 , an image detector 12 , an illumination light source 13 , a beam splitter 14 and an optical trap 15 .

[0043] The size of the fiber bundle interface 10 should match the size of the image-transmitting fiber bundle 2 to ensure good optical coupling characteristics.

[0044] The focusing lens 11 is an optical lens group structure, which is used to solve the problem of off-axis aberration correction of the lens and the uniformity of the illuminance of the image surface, and improve the imaging quality.

[0045] The image detector 12 is a CCD image detector for receiving images.

[0046]The illumination light source 13 couples the emitted light beam into the interface 10 of the image transmission fiber bu...

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Abstract

The invention relates to an anti-electromagnetic interference image monitoring device, which is used for acquiring the image information of a tested sample in an anechoic chamber, and is characterized by comprising an optical imaging system, an image transmission optical fiber bundle and an image analysis host. The optical imaging system is made of a non-metal material, is arranged in the anechoic chamber to image the tested sample, efficiently couples the image of the tested sample into the image transmission optical fiber bundle, transmits the image to the image analysis host outside the anechoic chamber, and finally, displays the real image information of the tested sample subjected to image analysis on an electronic display screen; the part of the device in the anechoic chamber is an optical image transmission structure made of the non-metal material, is not interfered with by electromagnetic interference, has small disturbance on a uniform electromagnetic field of the test, and can further improve the data accuracy of the electromagnetic compatibility radiation immunity test.

Description

technical field [0001] The invention relates to the technical field of electromagnetic compatibility tests, in particular to an image monitoring device against electromagnetic interference. Background technique [0002] The purpose of the electromagnetic compatibility test is to evaluate the ability of the system, equipment and external system, equipment or electromagnetic environment to work in harmony without interfering with each other. Among them, the radiation immunity test is a very key test item in the electromagnetic compatibility test. It conducts the electromagnetic interference test on the sample under test (DUT) through the radio frequency electromagnetic field with high field strength of the broadband antenna. The radio frequency electromagnetic field strength in the test can reach Several thousand V / m. For example, the test field strength of auto parts or complete vehicles is usually 200V / m, and the maximum is 1200V / m. The test transient field strength of equip...

Claims

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Application Information

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IPC IPC(8): H04N5/225H04N7/18
CPCH04N7/18H04N23/51H04N23/55
Inventor 李金龙黄怿王廷云张小贝邓传鲁胡程勇
Owner SHANGHAI INST OF MEASUREMENT & TESTING TECH
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