基于辐射场窄带测试的电晕放电远距离探测技术研究

发布时间：2018-02-10 20:31

本文关键词： 电晕放电辐射场宽带测试窄带测试远距离探测　出处：《电波科学学报》2014年05期 　论文类型：期刊论文

【摘要】：利用电磁辐射场实现对电晕放电的探测,多采用宽带测试,带内干扰多、信噪比低、测试距离近.为此,提出了基于窄带测试的电晕放电远距离探测方法,通过分析电晕能量分布及背景干扰,合理选择窄带测试频段,实现对电晕放电目标的远距离探测.测试结果表明:较之宽带测试,窄带测试信噪比较高、抗干扰能力强、测试距离远;120~315 MHz频段内的电晕放电信号,背景干扰少,信噪比不低于4dB,适宜用作电晕放电信号远距离测试的特征窄带频段.提出的窄带测试方法具有普遍性,结合现代检测技术和信号处理技术将会大大增加测试距离,对丰富现有电晕放电远距离探测手段具有重要意义.
[Abstract]:Using electromagnetic radiation field to detect corona discharge, wideband measurement is used, intra-band interference is more, SNR is low, and test distance is close. Therefore, a method of long range detection of corona discharge based on narrowband measurement is proposed. By analyzing the corona energy distribution and background interference, the narrow band test frequency band is reasonably selected to realize the remote detection of corona discharge target. The test results show that the SNR of narrowband test is higher than that of wideband test, and the anti-jamming ability of narrowband test is stronger than that of wideband test. The corona discharge signal with less background interference and a signal-to-noise ratio (SNR) of not less than 4dBis suitable for the long range measurement of corona discharge signals in the corona discharge signal range of 120,315 MHz. The proposed narrowband measurement method is universal, and is suitable for long range measurement of corona discharge signals. The combination of modern detection technology and signal processing technology will greatly increase the test distance, which is of great significance to enrich the existing corona discharge remote detection methods.
【作者单位】：军械工程学院静电与电磁防护研究所;
【基金】：国家自然科学基金(61172035)
【分类号】：TM851

【共引文献】