新型矿用便携式静态电阻应变仪的研制

为了解决目前开采速度较快或分叉巷道多的矿井使用固定应变仪安装复杂、维护困难、成本较高等突出问题,提出了一种新型矿用便携式静态电阻应变仪。该应变仪以ATmega16L单片机为主控芯片,硬件上采用电子程控开关切换、精密仪表放大器和先进低频滤波等对信号采集调理,LCD显示检测结果,利用专用时钟芯片记录巷道顶板压力检测时间,并由SD卡存储;软件上下位机利用AVR单片机的输入捕捉,PWM,SPI等功能,上位机界面用LabVIEW编写,友好方便。通过对其工作性能的测试,证明了该应变仪精度高、电路简单、抗干扰能力强等优点。

Research and fabrication of a new portable instrument of static resistance strain gauge used in mine

To resolve the problems of complex installation,difficult to maintain and high cost while using the fixed strain gauge in fast exploiting or more bifurcation roadway of mines,a new portable static strain gauge used in mine is proposed.The static resistance strain gauge uses ATmega16L as the master control chip.The electronic program-controlled switching technology,precision instrumentation amplifier and advanced low-frequency filtering are integrated in hardware design for signal collection and modulation,LCD is selected to display the test results and a dedicated clock chip is used to record the detection time of the pressure of the tunnel roofs and stored in the SD.The functions of input capture PWM and SPI of AVR are applied in programmable logic controller.Interface of PC is compiled by LabVIEW which is friendly and convenient.According to the test on the strain gauge,the advantages of high precision,simple circuit,strong anti-interference ability has been proved.