摘要
非介入测压对液压系统的故障诊断与检测具有关键作用,为了提高超声非介入式测压的测量精度,提出了一种基于互相关理论的超声延时计算方法,实验结果与客观实际较为相符,验证了基于互相关理论的超声非介入压力测量技术的可行性,为小管径液压系统的在线压力测量提供了一种新的方法。
Non-intrusive pressure measurement play a crucial role in the failure diagnosis and detection of hy- draulic system. The method based on ultrasonic is discussed. In order to improve the measuring accuracy, the time delay estimation method based on cross-correlation theory is proposed. Also the measurement system via ultrasonic technique is designed. The results indicate that the proposed method is feasible for non-intrusive pressure measurement. It offers a new online pressure measurement method for hydraulic system which diameter of the pipes is less than 15 ram.
出处
《测控技术》
CSCD
北大核心
2009年第11期87-90,共4页
Measurement & Control Technology
基金
航天科技创新基金项目(CASC0412)
教育部博士点基金项目(20070006047)
关键词
非介入压力测量
超声波
互相关
液压系统
Non-intrusive pressure measurement
ultrasonic
cross-correlation
hydraulic system
