Method for testing accurate multifrequency and synchronous synergetic conduction sensitivity at high speed

A test method and sensitivity technology, applied in the field of electromagnetic radiation, can solve problems such as low efficiency, achieve rapid diagnosis and improve test efficiency

Active Publication Date: 2009-09-02
BEIHANG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention mainly aims at the problem that the traditional point-by-point step-by-step scanning needs to test each frequency point one by one in the electromagnetic compatibility sensitivity test, resulting in low efficiency, and proposes a high-sp

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  • Method for testing accurate multifrequency and synchronous synergetic conduction sensitivity at high speed

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Embodiment

[0032] For the conduction sensitivity test in the frequency range of 10kHz ~ 30MHz, according to the sensitivity test frequency scan in GJB152A-97, 110 frequency points are required. If it is divided into five groups, establish the sensitivity frequency as shown in Table 1 Scan table (unit Hz):

[0033] Table 1 Frequency scanning table divided into five groups

[0034] First group Second Group The third group Fourth group fifth group 10100 12571.6302 15648.1075 19477.4475 24243.8879 10201 12697.3465 15804.5885 19672.222 24486.3267 10303.01 12824.32 15962.6344 19868.9442 24731.19 10406.0401 12952.5631 16122.2608 20067.6337 24978.5019 10510.1005 13082.0888 16283.4834 20268.31 25228.2869 10615.2015 13212.9097 16446.3182 20470.9931 25480.5698 10721.3535 13345.0388 16610.7814 20675.7031 25735.3755 10828.5671 13478.4892 16776.8892 20882.4601 25992.7293 10936.8527 13613.274 16944.6581 21091.2847 2...

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Abstract

The invention discloses a method for testing accurate multifrequency and synchronous synergetic conduction sensitivity at high speed, which comprises the steps: firstly, a testing frequency from 10 kHz to 18 GHz is dispersed according to a frequency step length which conforms to a GJB sensitivity testing requirement to ensure a testing frequency point; the whole testing frequency is grouped from low to high beginning from a starting frequency, and each group has N frequency points; then, an arbitrary waveform generator is controlled to output N frequencies once and switch the frequencies according to group steps; the frequency groups are scanned, if a tested device is sensitive, the frequency group is scanned point to point to determine the sensitive frequency point, and the sensitivity threshold level of the frequency point is determined according to a military standard single-point testing method; the frequencies are switched according to a group stepping mode, each group of frequencies integrally step according to the N delta f step length equivalently, and the next group of multifrequency signals is output until a whole frequency band is scanned completely. The method can synchronously test a plurality of frequently points by scanning once, automatically realize the step scan according to the groups, greatly increase the testing efficiency of the sensitivity test and can quickly diagnose the failures of the sensitive points.

Description

technical field [0001] The invention relates to the field of electromagnetic radiation, in particular to a high-speed testing method for accurate multi-frequency synchronous cooperative conduction sensitivity. Background technique [0002] Any electrical, electronic equipment and subsystems will inevitably feed back electromagnetic energy to the power line when they are working, and at the same time leak and radiate electromagnetic energy from the casing, interconnection lines, antenna feeders, etc. to the space. These intentional and unintentional electromagnetic energies constitute the electromagnetic environment at a certain time and place, and the complex and harsh electromagnetic environment is a potential source of interference for the site equipment. Equipment-level electromagnetic emission and sensitivity measurement is a means to evaluate the EMC level of equipment, and it is also the basis for taking EMI measures. EMC testing can be summarized into 4 categories: r...

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Application Information

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IPC IPC(8): G01R31/00
Inventor 戴飞苏东林史德民曹景阳
Owner BEIHANG UNIV
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