基于超声非线性的固体火箭发动机药柱测厚方法  

Solid rocket motor propellant gain thickness measurement method based on ultrasonic nonlinearity

作　　者：蔺晓煜 王黎明[1] 聂鹏飞 侯懿桃 徐旭东 张帅 Lin Xiaoyu;Wang Liming;Nie Pengfei;Hou Yitao;Xu Xudong;Zhang Shuai(College of Information and Communication Engineering,North University of China,Taiyuan 030051,China;Shanxi Gemeng Sino-US Clean Energy R&D Center Co.,Ltd.,Taiyuan 030000,China)

机构地区：[1]中北大学信息与通信工程学院,太原030051 [2]山西格盟中美清洁能源研发中心有限公司,太原030000

出　　处：《国外电子测量技术》2024年第7期176-181,共6页Foreign Electronic Measurement Technology

基　　金：中北大学校基金(XJJ201919);2021年山西省应用基础研究计划项目(20210302124545);国家自然科学青年基金(62203405);山西省重点研发计划(202202110401015)项目资助。

摘　　要：为了扩大对高衰减固体火箭发动机药柱的厚度测量范围,利用超声纵波在固体传播中产生静态分量(static components,SC)的理论。通过一发双收的反射式超声换能器组合,即发射端超声换能器工作频率为500 kHz,接收端超声换能器工作频率分别为50和500 kHz,完成多种厚度药柱的静态测量。测量结果表明,对于厚度较大的药柱,50 kHz超声换能器可以放大并接收由500 kHz超声纵波所激发的SC低频信号;对于厚度较小的药柱,500 kHz可以同时接收500 kHz基波信号和SC低频信号。相较于传统同频收发的换能器组合,该一发双收的换能器组合在不加大测厚盲区的同时,提高了可测量厚度范围,可以完成20~200 mm厚度范围内的测量,有一定的创新性和较好实用价值。In order to expand the thickness measurement range of the propellant gain of high-attenuation solid rocket motor,the theory of static component(SC)generated by ultrasonic longitudinal wave in solid propagation is used in this paper.Through the combination of reflective ultrasonic transducers with one transmitter and two receivers,the working frequency of the ultrasonic transducer at the transmitter is 500 kHz,and the working frequency of the ultrasonic transducer at the receiving end is 50 and 500 kHz respectively,to complete the static measurement of a variety of thickness of propellant gain.The measurement results show that the 50 kHz ultrasonic transducer can amplify and receive the low-frequency SC signal excited by the 500 kHz ultrasonic longitudinal wave for the larger thickness of the propellant gain,and the 500 kHz can receive the 500 kHz fundamental signal and the low-frequency SC signal at the same time for the smaller thickness of the propellant gain.Compared with the traditional transducer combination of the same frequency transceiver,the transducer combination of one transmitter and two receivers improves the measurable thickness range without increasing the blind area of thickness measurement.And it can complete the measurement in the thickness range of 20~200 mm,which has a certain degree of innovation and good practical value.

关 键 词：固体火箭发动机 超声换能器 静态分量SC 一发双收 

分 类 号：TN911.6[电子电信—通信与信息系统]