Acquisition of a Computer-Controlled Ultrasonic Measurement System

该项目旨在升级超声波 岩石力学实验室的测量系统 宾夕法尼亚州立大学。一个新的脉冲发生器，一个新的 数字示波器将是主要组成部分， 升级系统。 岩石的应变松弛 应力有两个主要分量;一个是瞬时的， 另一个是时间依赖性的。在很大程度上， 岩石的松弛包括岩石的形成和打开， 微裂纹，这种松弛可以通过测量 岩石超声波特性的变化。升级后的 超声波测量系统将允许岩石力学 实验室充分挖掘时间依赖性的潜力 应变松弛技术解释的应力历史 岩石在深层土壤条件下。

This project is intended to upgrade the ultrasonic measurement system in the Rock Mechanics Laboratory at The Pennsylvania State University. A new pulse generator, and a new digital oscilloscope will be the main components of the upgraded system. The strain relaxation of rocks that have been subjected to stress has two major components; one is instantaneous and the other is time-dependent. In large part the time-dependent strain relaxation of a rock involves the formation and opening of microcracks, and this relaxation can be monitored by measuring the changes in the ultrasonic properties of the rock. The upgraded ultrasonic measuring system will allow the Rock Mechanics Laboratory to fully exploit the potential of the time-dependent strain relaxation technique for interpreting the stress history of rocks under deep earth conditions.