The Body Fluid Density Sensor Based on Ultrasonic Wave

摘要：

This paper presented a kind of body fluid density sensor based on the shear horizontal surface acoustic wave (SH-SAW) generated and detected by interdigital transducers (IDT). When the body fluid comes in contact with the delay path in a SH-SAW device, the viscous coupling action will effect on the wave propagation. Consequently the frequency, phase and propagating velocity of the SH-SAW will be altered. The theory analysis and initial experiment are presented. The result shows when signal frequency is 57.8MHz, the SH-SAW can be excited effectively in the lithium niobate crystal. By measuring the phase change of the SH-SAW, the body fluid density can be detected. Compared with traditional body fluid density sensor, the SH-SAW body fluid density sensor has the advantages of simple construction, high precision and little sample etc.

作者: Xiafu Lv Yingqiong Luo Yongping Zheng Chang Dong Mingxi Deng

作者单位: Automation Institute Chongqing University of Post and Telecommunications 400065 Chongqing, China Institute Staff Room of Physics Logistics Engineering University 400016 Chongqing, China

会议类型: 国际会议

会议名称: 2006 IEEE International Conference on Information Acquisition

会议地点: 山东威海

会议语种:英文

页码: 727-731

在线出版日期: 2006-08-20（万方平台首次上网日期，不代表论文的发表时间）