Development of an autoumatic data processing for triaxial compression test

Abstract

In triaxial compression test using in soil mechanics, three parameters need to be monitored: pressure, displacement and drainage volume during testing time. The drainage volume during the test flows through a vertical pipe which accompanied with a ruler. Pressure and displacement are indicated by gauges. In manual operation, these parameters are recorded by examiner after certain duration. This paper studies on developing an automatic data processing for automatic recording these parameters. A camera is used to track the drainage level then its volume is determined. Digital pressure sensor and displacement sensor are used to measure pressure and displacement. Two PIC 18F458s are used to receive signals from sensors and connect to PC through RS232. The test results in the required forms are given using software. Experiment has been done to verify the proposed solution.