基于C8051F340的采场煤岩二轴应力监测系统设计

摘要

The project presents a more desirable method of coal-stress-monitoring based on the disadvantage which is shown by the stress monitoring equipments which are being used in Chinese coal mines at present.This project has upgraded the single sensor that is widely utilized in coal mines all over the country to biaxial sensor which is able to pick stress values in two-dimensional space.More closer to the realistic situation of stress has been reflected by the biaxial sensor.Hierarchical controlling method is applied to the project.The main station commands are sent to sub-station and the values picked are sent back to main station.The whole system is controlled by the microcontroller C8051F340,which are low-power dissipation.In order to achieve better filtering effect,the chip MAX260 is applied to the project.The pressure value picked is enlarged to the amplitude required by the way of two-stage amplification.%该设计项目基于当前采场煤岩应力监测系统的缺点,提出了一种更为理想的采场煤岩应力监测的方法。该方法改进了应力采集所用到的传感器的结构构造设计,使其由单应力轴变为双应力轴,可以同时采集上下、左右两个维度煤岩应力的大小,使得传感器反映出的地应力的情况更加接近理想情况。整个项目采用了分级控制的方法,控制命令由主至次发送,数据由次至主传送。该项目使用低功耗的C8051F340单片机作为主控制器来控制整个系统的工作过程。为了取得较好的滤波效果,采用了滤波芯片来进行滤波。放大电路采用两级放大方式对采集信号进行放大。项目采用当前普遍使用的RS485总线方式进行通信。