Hardware design , the main part of tlle system , stresses the signal regulating methods such as signal amplification , channel choice and am transformation as we1l as the measure of usual parameters such as ac & dc electric parameters , contact resistance , time , temperature and practical signal transform circuit , etc . furthermore , the anticipated functions have been proved by practical use 其中硬件部分主要侧重于信号调理即信号的放大、通道选择、模数转换以及各测试量包括直流电参数、交流电参数、接触电阻、时间以及温度的测试方法以及具体的信号变换电路,并以生产出实际产品的方式验证了结果。