基于P矩阵模型的声表面波胎压微传感器研究  

Study on a Novel SAW TPMS Sensor Based on the P-Matrix Model

作　　者：刘铁[1] 郑亮[1] 胡泓[1] 李天利[1] 

机构地区：[1]哈尔滨工业大学深圳研究生院基础科学学科部,广东深圳518055

出　　处：《传感技术学报》2008年第6期977-980,共4页Chinese Journal of Sensors and Actuators

摘　　要：轮胎压力监视系统是一种当轮胎气压与温度超出正常标准时,能及时提醒驾驶者的系统。研究的目的在于对该系统一款新型无源无线声表面波微传感器的设计进行理论分析和参数优化。为此,根据耦合模理论推出了P矩阵模型新的表示形式并验证了该表示形式在分析双向对称一致IDT和反射器方面的适用性和精确性。应用P矩阵方法分析IDT的输入导纳和该SAW器件的插损,结果显示该传感器设计具有优良的插损性能。Tire pressure monitoring system （TPMS） is an electronic system monitoring the air pressure in a pneumatic tire at real time. The goal of this paper is to analyze and optimize the design of a novel wireless passive SAW sensor used in TPMS, via theoretical derivation and simulations. For this purpose, a P-matrix with new expression is derived utilizing the coupling-of-modes （COM） theory. The applicability and accuracy of the new P-matrix expression in analyzing the unitary symmetry IDT and the reflector have been validated. The analysis of the insert loss （IL） of the novel SAW sensor based on this P-Matrix model reveals that this design has excellent performance in the aspect of insert loss.

关 键 词：胎压监测系统 声表面波传感器 P矩阵 插入损耗 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置]