A High Accuracy Signal Conditioning Method and Sensor Calibration System for Wireless Sensor in Automotive Tire Pressure Monitoring System
Tire Pressure Monitoring System (TPMS) is used to detect when one or more of the vehicles tires is 25 percent or more below the manufacturers recommended inflation pressure. A TPMS system consists of four wireless sensors, a high frequency (HF) antenna and a central receiver. In this paper, a high accuracy sensor incorporated with a sensor signal conditioning chip is presented. A new TPMS wireless signal conditioning method for automotive applications is developed. The signal conditioning method consists of a signal conditioning chip and a calibration algorithm. The calibration algorithm has been established by relating to measured voltage, temperature and pressure ADC reading at three different temperature ranges. Twenty-five relating coefficients are obtained from characterization test before sensor signal conditioning is applied to TPMS wireless sensor calibration. The test results show that the signal conditioning method provides higher accuracy performance for wireless sensor within a battery supply voltage range from 2.1V to 3.6 V and a temperature range from -40°C to 125°C. The signal conditioning method also reduces the cost of wireless sensor. Moreover, a presented sensor calibration system helps to improve production efficiency and lower production costs.
wireless sensor pressure sensor signal conditioning calibration algorithm sensor calibration system
Yi Leng Genbao Zhao Qingxia Li Chunyu Sun Sheng Liu
Department of Electronics and Information, Huazhong University of Science and Technology, Wuhan, Chi CERI Electronics & Electric Department, Chery Automobile Co., Ltd., Wuhu, China, 241009 Department of Electronics and Information, Huazhong University of Science and Technology, Wuhan, Chi Department of Electronics and Information, Huazhong University of Science and Technology, Wuhan, Chi
国际会议
上海
英文
2007-09-21（万方平台首次上网日期，不代表论文的发表时间）