【作者】 陆益民； 陈晓东； 刘正士； 陈心昭；

【Author】 Lu Yimin;Chen Xiaodong;Liu Zhengshi;Chen Xinzhao;

【机构】 合肥工业大学机械与汽车工程学院噪声与振动工程研究所；

【摘要】 近场声全息测量系统的系统误差包括幅值误差和相位误差两部分,它们是近场声全息技术中主要测量误差源。分析表明,声全息测量中的系统误差是由于测量通道的幅频特性失调和各通道间的相位失配所引起的。本文分析了这两种误差对声全息测量复声压精度的影响;推导了由于测量系统的幅值和相位失配误差而导致的声场重构误差的公式。更多还原

【Abstract】 The main components of systematic errors in Nearfield Acoustical Holography(NAH) measurement system are the amphtude error and the phase error.They are the main error sources in the NAH technology.It is clear that the amphtude error and the phase error were caused by the distortion of amplitude-frequency characteristic and the phase mismatch between measuring channels of measurement system.In this paper,the influence of those two kinds of errors on acoustical holographic data precision is analyzed quantitatively.Error expression of holographic reconstruction with respect to the systematic errors is deduced.更多还原