摘要
针对自主研发的球形检测器在供水管道中的定位需求,设计了一种圆弧形复合超声波振子,基于压电方程,对其振动特性进行理论和仿真分析,得出主要振型和最优工作频率。研究超声波发射电路与复合超声波振子之间阻抗匹配设计,实现最优的超声波能量转换驱动效率。基于小波变换包络检测方法的超声波信号检测技术,计算得出超声波信号传输的精确时间,实现了球形检测器定位系统。经测试,100 m管道长度静态测距定位精度误差约为2%,动态定位距离达到170 m,与惯导数据计算距离之间误差不超过6%,符合球形检测器在供水管道中的实时定位需求。
According to the positioning requirements of the spherical detector independently developed in the water supply pipeline,an arc-shaped composite ultrasonic vibrator is designed.Based on the piezoelectric equation,its vibration characteristics are analyzed theoretically and simulated,and the main vibration modes and the optimal working frequency are obtained.The impedance matching design between the ultrasonic transmitting circuit and the composite ultrasonic vibrator is studied to achieve the optimal ultrasonic energy conversion drive efficiency.Based on ultrasonic signal detection technology of wavelet transform envelope detection method,the accurate time of ultrasonic signal transmission is calculated.The spherical detector positioning system is realized.After testing,the static ranging positioning accuracy of 100 meters of pipeline length is 2%,the dynamic positioning distance reaches 170 meters,and the error between the calculated distance and the inertial navigation data is not more than 6%,which meets the realtime positioning requirements of the spherical detector in the water supply pipeline.
作者
李云飞
汪炜昊
付明
张飞
周扬
LI Yun-fei;WANG Wei-hao;FU Ming;ZHANG Fei;ZHOU Yang(Hefei Institute for Public Safety Research,Tsinghua University,Hefei 230601,China;Anhui Province Key Laboratory of Human Safety,Hefei 230601,China;Department of Engineering Physics,Tsinghua University,Beijing 100084,China)
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2023年第5期1505-1513,共9页
Journal of Jilin University:Engineering and Technology Edition
基金
国家重点研发计划项目(2018YFC0809304)
安徽省中央引导地方科技发展专项项目(201907d07050007)。
关键词
检测技术
供水管道
球形检测器
超声波定位
复合超声波振子
阻抗匹配
包络检测
detection technology
water supply pipeline
spherical detector
ultrasonic positioning
composite ultrasonic vibrator
impedance matching
envelope detection
