Study Of Key Technologies Of Water Analyzer Based On Embedded Technology

With the development of the human society, more and more waste generated by industrial and agricultural production is discharged. It will cause serious water pollution if these wastes are directly or indirectly discharged into waters without any treatment. In recent years, water pollution incidents have occurred frequently. In order to prevent water pollution, it is importment to establish early warning systems and monitor the water quality.The applications of water quality testing using aquatic become more and more with the development of the modern information technology, microelectronics and biotechnology. In this paper, the water analyzer is designed based on the principle that toxic substances can inhibit the luminous intensity of photo bacterium. It detects changes of luminous intensity of light-emitting bacteria in order to analysis of biological toxicity of the wate quality caused by the metals and other organic pollutants. The water analyzer uses Samsung S3C2410 microprocessor as control core, using embedded Linux operating systems, supplemented by the corresponding peripheral circuits as hardware platform to achieve a relatively high degree of automation, intelligent control systems. The system can quickly, accurately and on-line monitor the comprehensive toxicity of water quality.The main work in this paper is as follows:(1) In this paper I have researched power consumption of the embedded system in hardware and software layers. I research dynamic power and static power consumption at the hardware level. I propose the static look-up table of power analysis method and the concept of power sensitivity analysis after studying the source of dynamic power, dynamic power consumption model, static power model for in-depth theoretical. So we consider the power consumption feature to reduce power consumption.(2) Studied the principle of luminescent bacteria toxicity test. I construct a growth curve of luminous bacteria and luminous intensity curve of luminous bacteria under the toxic substances by experimental data. These data provide evidence for the determination of level of water quality.(3) Design the hardware and the software for the embedded system. The hardware includes the CPU core circuit and some external control circuit design. CPU core circuit include processor circuit, FLASH, SDRAM, network interface circuit, the standard JTAG interface, power supply circuit, reset circuit, clock circuit. Peripheral circuit module includes the touch screen, LCD display interface circuit, UART, the motor drive circuit, the light signal and temperature data acquisition circuit. I propose a startup control algorithm so that the problems about stepper motor at startup have been resolved.(4) Construction of a suitable embedded Linux operating system. Transplant the embedded Linux kernel, vivi bootloader, root file system, QT and applications according to the selected hardware platform.