基于等間距磁晶格應變檢測的基本原理，設計了信號檢測和波形轉換電路，將對應變的檢測轉化成為對時間量的計測，并且推導了時間量與構件應變之間的數學表達式。以8051 單片機為核心，研究了應變檢測系統的數據采集以及和上位機的通訊方法。利用PC 機完成對檢測結果的顯示、存儲、打印等功能。整個應變檢測系統實現了以非接觸的方式對機械構件應變進行實時的在線檢測。
關鍵詞：等間距磁晶格 應變檢測 單片機
Abstract：The electrocircuit of signal processing and conversion of obtained wave are designed based on equispaced magnetic field of strain detection. The detection of strain of mechanical component is converting to the calculation of total time of the obtained wave. And the calculation formula between the measured time and the stain of component is given. The method of data acquisition and communication with PC are studied based on 8051 microcontroller. The function of display, save and print is accomplished. The on-line strain detection of mechanical component is implemented by non-contact way.
Key Words: equispaced magnetic field, strain detection, microcontroller