As society advances, the development of production processes and production technologies,the detection of the level control system have a higher demand. New electronic technology of microelectronics technology and miniature computers is widely used. Single chip control system to set up operationswith high control accuracy, reliable performance, convenient,low cost, is applied to the level contral.
This article describes the LM-type liquid level sensor and A / D conversion chip ADC0809, and AT89C51 microcontroller as the main control componentof the liquid level detection system design methods. This article respectively from the liquid level detection, A/D converter, Digital display, Limit alarm and several aspects of the hardware circuit have conduct a more detailed description. Then the A/D conversion process, Digital tube display program, Limit alarm procedures have a fairly detailed, and using a flow chart for further explanation.
Through joint debugging of software and hardware, The basic realization of the regulation on the level within a certain range of liquid level regulation, Dynamically shows the level results, Achieve alarm, Entirely Achieve the requirements of the mission statement.
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