Out The End Of The Wireless Pressure Monitoring System Design

Traditionally, the rear air pressure data of train air testing in railway station is fetched manually by mechanical manometer and reported to monitoring center by intercom. The air pressure data could not be preserved and the testing is not be implemented automatically. In order to improve the air brake testing on train, it is necessary to develop an intelligent rear air pressure real-time monitor system, which is significant to enhancing the safety of train inspection, ensuring the safety of train driving and adapting for raising speed and loading heavily.This thesis works on the key technology about ultra-low power train air pressure data acquiring system based on MSP430 micro-controller and develops a portable train air pressure data acquiring and recording device. The thesis generally analyzes the principle and implementation about ultra-low power design. The ultra-low power designing on the requirement of the system is achieved in the thesis. In the system, one flash memory is added to enhance the data storage capability and one real-time IC is supplied for checking up history data. In order to further reduce power and enhance data storage efficiency, the air pressure data is compressed and the RTOSμC/OS-II is transplanted to system, which could realize multi-task operation, for improving system's stability and making air pressure test more real-time. Using SPI Bus to connect PTR8000 wireless module, the MSP430F1611 micro-controller could communicate wirelessly, which guarantees a reliable data transmission.The thesis presents a practical technique scheme about wireless intelligent rear air pressure monitor system. The technique scheme could satisfy railway specification and confirm a more stable, reliable and accurate rear air pressure testing. The real-time scheme, data compression algorithm, low power design and wireless communication technique used in the system could make the monitor system to satisfy railway specification and to be controlled remotely in hard environment, as well as adapt to other industrial occasions.