压力源微机伺服系统的研制

工程项目的建设离不开大量岩土试验数据的支撑,在常规的室内岩土试验方法中,三轴剪切试验是测试岩土体抗剪强度的一种非常重要的试验方法。压力源微机伺服系统是一种可受计算机控制、由步进电机驱动的精密水压力发生器,主要应用于三轴剪切试验中围压、反压与体积变化的精确控制与量测,还可作为独立恒压源以取代常规的室内试验压力源,如砝码、空压机及渗透水头等。对比试验结果表明,压力源微机伺服系统性能稳定,提高了三轴剪切试验中压力与体积变化的量测精度,具有自动化程度高、灵敏度高、响应速度快等特点。

Development of pressure source microcomputer servo system

The construction of engineering projects cannot be separated from the support of a large number of geotechnical test data.In the conventional indoor geotechnical test methods,tri-axial shear test is a very important method to test the shear strength of rock and soil.Pressure source microcomputer servo system is a precision water pressure generator controlled by computer and driven by stepper motor.It is mainly used for precise control and measurement of confining pressure,back pressure and volume change in tri-axial tests.It can also be used as an independent constant pressure source to replace conventional indoor geotechnical test pressure sources such as weights,air compressors and seepage head,etc.The comparative test results show that the performance of the pressure source microcomputer servo system is stable,and the measurement accuracy of pressure and volume changes in tri-axial shear test is improved.It has the characteristics of high automation,high sensitivity and fast response.