【摘要】 本文采用正弦函数分析法，对面外云纹图象栅线噪声消除进行了理论分析研究。通过面外云纹一般表达式中的各项频率分析，在反复实践的基础上，利用正弦加速凸轮的位移、速度、加速度方程的特点，由调压整流电路控制直流微电机，设计了一套消除面外云纹栅线噪声振动装置，并成功地应用于QHZW88型面外云纹仪中，较好地消除了栅线噪声对真实图象的影响，光栅沿主方向的往复振动（频率可调）提高了云纹图象的信噪比。更多还原

【Abstract】 In this paper we use sine function analyzing method to analyze the elimination of the grid chirp sound of the out-of-plane Moire. On the basis of experiments by analyzing all kinds of frequency of the generic expression of the out-of-plane moire and we designed a vibration device to eliminating the grid chirp sound of the out-of-plane moire.This device makes use of the characteristic of the displacement velocity, acceleration equation of the sineaccelerating cam and a direct current micro-electromotor which is controlled by the adjust-voltage and rectification circuit. this device has been applied successfully in QHZW88 out-of-plane moire apparatus to eliminates the influence upon the true image,which caused by the grid chirp sound. The reciprocating vibration-the frequency adjustable-of the grating lined vertical direction promote the ratio of signal to noise of the Moire image.更多还原