高电压技术2025，Vol.51Issue(7)：3225-3233,9.DOI:10.13336/j.1003-6520.hve.20240538
电缆局部放电超声检测用高灵敏度柔性PZT压电超声传感器
Highly Sensitive Flexible PZT Piezoelectric Ultrasonic Sensor for Cable Partial Discharge Ultrasonic Detection
摘要
Abstract
When the traditional piezoelectric ceramic ultrasonic sensors detect the partial discharge of a cable,there is an acoustic interface mismatch phenomenon.The partial discharge ultrasonic signal is severely attenuated during the propa-gation process.Therefore,the traditional piezoelectric ceramic ultrasonic sensor cannot detect the partial discharge of the cable with high sensitivity.In response to this phenomenon,a flexible ultrasonic sensor based on lead zirconate titanate(Pb(Zr0.52,Ti0.48)O3,PZT)piezoelectric film is designed and prepared according to the principle of acoustic impedance matching and the electromagnetic shielding requirements.The influence of different polarization modes on the sensitivity of the flexible sensor is studied,and the electromagnetic shielding performance,sensitivity curve and directional sensitiv-ity of the flexible sensor after packaging are tested.On this basis,the partial-discharge ultrasonic-signal detection experiment of the real cable air gap model based on the flexible sensor is carried out.The results show that the flexible sensor designed and prepared in this paper has good electromagnetic shielding performance and no directional sensitivity.The average and peak values of the sensitivity in the range of 30～200 kHz are 51.8 dB and 53.8 dB,respectively.In the ultrasonic detection of air gap discharge of the real cable,the detection sensitivity of the flexible sensor is 1.57 times that of the traditional piezoelectric ceramic ultrasonic sensor.关键词
电力电缆/局部放电/超声检测/柔性PZT压电超声传感器/PZT薄膜Key words
power cable/partial discharge/ultrasonic detection/flexible PZT piezoelectric ultrasonic sensor/PZT film引用本文复制引用
颜育,姚露露,吴明,刘泳斌,高景晖,钟力生..电缆局部放电超声检测用高灵敏度柔性PZT压电超声传感器[J].高电压技术,2025,51(7):3225-3233,9.基金项目
国家自然科学基金(52407026).Project supported by National Natural Science Foundation of China(52407026). （52407026）
