Application of the Environments On-Line Monitoring Data Acquisition System Based on ARM 9

This article presents the real-time sampling and counter control system controlled of Environmental On-line Monitoring System, as well as a comprehensive data parameters that are used to accessing water quality as COD, TOC, pH value, flow, which require data acquisition system to have a good real-time performance, powerful anti-interference performance, good stability performance, and good transplant characteristic. The overall structure design of data acquisition system which based on hardware platform of ARM9 processor S3C2440 and Linux real-time OS is presented in this paper. The A/D converter interface and Linux OS low-level driven program is developed. Comparative experiments of data collection have been done, and the results demonstrated that this proposed data acquisition system has better data processing speed and acquisition accuracy. This data acquisition system based ARM9 can fully meet the requirements of real-time monitoring for the industrial wastewater drainage. It effectively prevents from discharging pollutants stealthily and false information.