用相关法提高地震计相频特性测试精度

IMPROVING TEST PRECISION OF PHASE RESPONSE OFSEISMOMETER BY USING CORRELATION TECHNIQUE

论述了地震计相频特性的测试方法。传统的测试方法有多种 ,如过零检测法、李萨如图形法等。当测试过程存在一定噪声时 ,这些方法的测试精度会大大降低。用相关法进行相频特性的测试 ,可以有效抑制随机噪声的干扰 ,提高相位测量的精度。

There are several techniques for testing phase response of seismometer, such as zero-detection method and Lissajous method. However when certain noise exists in test process, test precision will considerably reduce. Using correlation means in testing phase response can reduce random noise and improve precision of phase test.