自动化仪表
自動化儀錶
자동화의표
PROCESS AUTOMATION INSTRUMENTATION
2014年
10期
84-86
,共3页
水晶晶体%频率偏移%超声波%扩频%分段匹配滤波
水晶晶體%頻率偏移%超聲波%擴頻%分段匹配濾波
수정정체%빈솔편이%초성파%확빈%분단필배려파
Quartz crystal%Frequency offset%Ultrasonic%Spread spectrum%Segmented matched filtering
针对传统方法难以检测传感器大范围频率偏移信号的问题，采用扩频技术解决这一问题。考虑无线温度检测以不同切型的晶体为核心、以超声波信号为载体，为设计出适合不同晶体特性、检测精度高、通用性强的检测仪表，对超声回波信号检测方式进行了改进，提出采用扩频技术中的分段匹配滤波进行传感器频率信号处理。经仿真证明，它可以有效保证超声波收发双方的同步，准确测出超声回波频率偏移值，可以推广用于其他需要频偏信号检测的场合。
針對傳統方法難以檢測傳感器大範圍頻率偏移信號的問題，採用擴頻技術解決這一問題。攷慮無線溫度檢測以不同切型的晶體為覈心、以超聲波信號為載體，為設計齣適閤不同晶體特性、檢測精度高、通用性彊的檢測儀錶，對超聲迴波信號檢測方式進行瞭改進，提齣採用擴頻技術中的分段匹配濾波進行傳感器頻率信號處理。經倣真證明，它可以有效保證超聲波收髮雙方的同步，準確測齣超聲迴波頻率偏移值，可以推廣用于其他需要頻偏信號檢測的場閤。
침대전통방법난이검측전감기대범위빈솔편이신호적문제，채용확빈기술해결저일문제。고필무선온도검측이불동절형적정체위핵심、이초성파신호위재체，위설계출괄합불동정체특성、검측정도고、통용성강적검측의표，대초성회파신호검측방식진행료개진，제출채용확빈기술중적분단필배려파진행전감기빈솔신호처리。경방진증명，타가이유효보증초성파수발쌍방적동보，준학측출초성회파빈솔편이치，가이추엄용우기타수요빈편신호검측적장합。
The wide range frequency offset of the sensor signals is difficult to be detected by traditional methods;this problem can be solved by adopting spread spectrum technology. Considering the crystal with different cutting type is the core of wireless temperature detection, and ultrasonic signal is the carrier, in order to design high precision and versatile detectors suitable for different crystal characteristics, it is necessary to improve the detection method for the ultrasonic echo signal. The frequency signal processing method for sensor by using segmented matched filtering in spread spectrum technology is proposed. The simulation proves that it effectively ensures the synchronization of both sending and receiving, to accurately measure the frequency offset of ultrasonic echo, thus it can be promoted to other applications requesting frequency offset signal detection.
