The interrogation technique was based on the use of two ( or more) wavelength-matched fiber Bragg gratings ( FBGs) to receive the reflected signal from the sensing FBG. 该技术利用两个(或多个)与传感光栅匹配的布喇格光纤光栅作为解调元件。
Interrogation signal of the wireless SAW sensor 延迟线型无线SAW传感器的访问信号
Digital signal processing is studied and used to extract the characteristic frequency of the measurand from the response of wireless passive sensors using SAW resonators, that is the echo to RF interrogation signal. 本文研究了用数字信号处理的方法从无源、无线单端对谐振器型声表面波传感器的响应信号即无线查询的回波信号中提取出包含被测量信息的特征频率。
The information of surface acoustic wave ( SAW) sensor is gained by interrogation unit emitting the RF interrogation signal and receiving the response signal ( the echo). 访问系统通过发射访问信号和接收回波并加以处理来获得测量信息。
The interrogation pulse, filter, signal amplifier, voltage comparator and the signal processing circuits are designed and realized. 设计并实现了激励脉冲发射电路、滤波、信号放大、电压比较、检波等信号处理电路。
The influence of the width of interrogation signal on echo and measurement was analyzed and the method to determine this parameter was presented. 分析了声表面波(SAW)传感器无线测量时访问信号的宽度对回波及测量的影响。
Basing on the measurement principle of this sensor, the interrogation pulse and the return signal processing circuits are designed. 基于该传感器的位移测量原理,设计了激励脉冲发射电路及回波信号处理电路。