Abstract
China's worsening water pollution, water quality deterioration resulting in declining water quality, so drinking water and water of urban life to deal with the field of environmental protection has always been an important issue. In this case also began to pay attention to our country, but also the design and development of a number of water quality testing instruments and meters, according to some raw data in this article and the study of expertise, water quality for portable detector designed to provide the research and learn from and help .
First, the design of the use of tap water quality testing and application of the principle, according to some easily measured variable (PH value, dissolved oxygen concentration, conductivity, turbidity, temperature) and the principle of single-chip control circuit, as well as monitoring and control variables, such as unpredictable The mathematical relationship between the easily measured by measuring the variables and mathematical calculations to be variable and unpredictable in order to achieve the measurement of unpredictable variables.
Secondly, the detection system hardware is based on single chip AT89S52 expansion as the core circuit, including the A / D converter, power supply circuit, the external clock circuit, data acquisition circuit, LCD display circuit, keyboard, display circuit and reset circuit and so on. Software in Windows integrated development environment uVision5l, the use of single-chip high-level language C5l prepared. In conclusion, summed up the future of this detection system development.
Key words: water quality testing; portable; water detector; AT89S52