Research Of String Vibration Type Mine Pressure Detecting System Based On ARM7

In recent years, along with the rapid development of the single chip microcomputer, the embedded system technology has become one of the most popular technology for its simple structure, stability and efficience. UC/OS-II, the embedded RTOS, is widely used for its advantages of structure compact, performance stable and source open. In coal mine safety production, collapse accident caused by collapse of stope roofs occupies a very important position. Rescue operation for such accident is hard to be proceeded. So this kind of accident will not only endanger the workers' life security, but also Caused significant economic loss. Therefore, it is particularly necessary to build an ARM7-based vibrating wire force detection system for preventing such accidents.In this paper, we have analyzed the development of domestic and foreign rock pressure detection technology, as a starting point, we detected the mine pressure, and combined with the current market mine pressure testing products and the classical theory making a further research to this system. To transform the high cost, complex in installation, low accuracy, weak in scalability and poor real-time, etc of the traditional facilities, we designed a vibrating detecting system of mine pressure which is based on ARM7. The system uses Philips ARM7TDMI-S core processor LPC2129which is embedded in relatively stable μ C/OS-Ⅱ as a core part of the system, while we uses the vibrating wire pressure sensor which is high stable. The main achievements of this system are vibrating wire pressure sensor pressure value acquisition, compensation, CAN transmission and alarm functions, and to ensure the high accuracy of the detected pressure value of the premise, considering the(software and hardware) how to reduce the detection process of background interference and improve the sensitivity and stability of the system in running.This system respected from the cost, installation, measurement accuracy, interference, expansion and the real-time into consideration, we use a processing mode, combining the software and hardware, which greatly improved the rock pressure of the operating performance of the detection system:on the one hand, the effective pressure measurement accuracy; the other hand, the system with real-time advantages.Figure [53] table [5] reference [63]...