可实现防碰撞通信的新型声表面波温度传感器

A Novel SAW Temperature Sensor with Anti-collision Capacity

摘要:

针对多声表面波传感器系统中各传感器信息读取时会产生通信碰撞的问题,提出了一种可实现防碰撞通信的新型声表面波温度传感器；通过分析声表面波温度传感器的回波脉冲信号,将沃尔什码作为编码内容实现了多声表面波温度传感器系统中各传感器的正交编码；将传感器对应的匹配信号与系统回波信号进行互相关运算,提取了系统中各传感器的感测温度信息,达到了防碰撞通信的目标；该传感器兼顾编码效率和加工工艺两方面要求,简化感测信息提取的复杂程度；仿真实验验证了上述理论的正确性。

Abstract:

In view of the collision problem in multiple SAW sensors system, a novel SAW temperature sensor with anti-collision capacity was proposed.Based on the echo pulse signal of surface acoustic wave temperature sensor, Walsh code is used as coded information to realize orthogonal codes of multiple SAW temperature sensors system.Each sensor information is achieved by doing cross-correlation calculation between matching signal and echo pulse signal of the system,then, the anti-collision goal is achieved.The novel temperature SAW sensor incorporates both the coding efficiency and the processing technology, simplifies the complexity of signal extraction. The theory is verified by simulation.