多种Chirp信号的调制及其在锚杆中传播特性分析

Modulation of Manifold Chirp Signals and Propagation Characteristics in Rock Bolts

作为选定的激振信号形式,Chirp信号已成为新型锚杆检测设备研究体系的重要组成部分。本文首先将Chirp信号进行分类介绍,然后借助自主开发的Delphi应用程序,对调制出的多种Chirp信号进行室内试验,试验结果证明Chirp信号具有良好的自相关特性和衰减缓慢的特性,因此非常适合作为锚杆检测所用的震源信号。

For being chosen as an excitation signal,Chirp signal is an important part of the new testing system of bolt-anchoring quality,thus being the highlight of the study.The Chirp signals are firstly distinguished in different ways.Then,with the help of the application compiled by Delphi,laboratorial tests are launched aiming to research the features of modulated Chirp signals.Results show that Chirp signal has good autocorrelation and slow attenuation and is quite suitable to detect signal for vibroseis.