基于时间序列的变电站设备上方异响源位置声成像定位

Acoustic imaging location model of abnormal sound source above substation equipment based on time series

为了实现变电站设备上方异响源位置的可靠定位,针对异响源位置信号完整度较低的问题,研究基于时间序列的变电站设备上方异响源位置声成像定位模型。应用麦克风阵列技术采集变电站设备上方声信号,采用光子技术激光测距技术调整传声器的排列距离,使传声器处于最佳的距离范围内;基于混沌时间序列分离重构后采集的声信号,获取信号中的异响信号后,结合延时求和波束形成算法和可控相应功率算法,计算该异响信号的频域分布以及频域内信号的功率值,获取图谱中最高值对应的位置,即完成变电站设备上方异响源位置声成像定位。测试结果显示:该模型具有可靠的声信号采集能力,信号分离效果,分离后异响信号设有发生扩散现象,完整度较高;完成异响源声图像生成,定位误差低于(0.01,0.0)m。

In order to ensure the reliable location of the abnormal sound source above the substation equipment,aiming at the problem of low signal integrity of the abnormal sound source position,the acoustic imaging location model of the abnormal sound source above the substation equipment based on time series is studied.The microphone array technology is used to collect the acoustic signal above the substation equipment,and the photon technology and laser ranging technology are used to adjust the arrangement distance of the microphones,so that the microphones are in the best distance range;The collected acoustic signal is separated and reconstructed based on the chaotic time series.After obtaining the abnormal sound signal in the signal,the frequency domain distribution of the abnormal sound signal and the power value of the signal in the frequency domain are calculated in combination with the delay sum beamforming algorithm and the controllable corresponding power algorithm,and the position corresponding to the highest value in the spectrum is obtained,that is,the acoustic imaging location of the abnormal sound source above the substation equipment is completed.The test results show that the model has reliable acoustic signal acquisition ability and signal separation effect.After separation,the abnormal sound signal has diffusion phenomenon,and the integrity is high;The abnormal sound source image generation is completed,and the positioning error is less than(0.01,0.0)m.