A Multi-frequency Wireless Passive Pressure Sensor for TPMS Applications

被引：3
|
作者：
Wang, Xiaomu [1 ,2 ]
Zhou, Changjian [1 ,2 ]
Zhang, Zhaohu [1 ,2 ]
Ren, Tianling [1 ,2 ]
Liu, Litian [1 ,2 ]
机构：
[1] Tsinghua Univ, Inst Microelect, Beijing 100084, Peoples R China
[2] Tsinghua Univ, Tsinghua Natl Lab Informat Sci Technol, Beijing 100084, Peoples R China
来源：
2009 ASIA PACIFIC CONFERENCE ON POSTGRADUATE RESEARCH IN MICROELECTRONICS AND ELECTRONICS (PRIMEASIA 2009) | 2009年
关键词：
D O I：
10.1109/PRIMEASIA.2009.5397439
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A multi-frequency wireless passive pressure sensor was developed for tire pressure monitoring system. The applied sensor was fabricated with SAW delay lines on a membrane, which produced enhanced sensitivity and accuracy by means of multiple frequency Continues Wave. The SAW elements operate at two frequencies in 434 MHz band. The pressure is determined by calculating the reflective phase difference between the two frequencies. This new method avoids phase ambiguity and temperature dependence due to large membrane bending and temperature variation, and therefore enhances the sensor sensitivity and accuracy. In this paper, the implementation of the Tire Pressure Monitoring System (TPMS) comprising remote sensor fabrication, interrogator structure and signal processing algorithm were described. Issues about sensor calibration were also discussed. This sensor attained superior high pressure sensitivity and lower system complexity compared to conventional SAW sensors, and is very suitable for TPMS.
引用
收藏
页码：89 / +
页数：2
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