Level measurement has always been closely related to automation, almost in every field of production and life. In recent years, due to the development and application of new detection principle and micro-electronic technology, the liquid level measuring instrument tends to be miniaturized and intelligent, and gradually realizes fault diagnosis and alarm, high accuracy, high reliability, security and multi-function.
The real-time detection system of liquid level and liquid velocity developed in this paper can automatically detect liquid level and accurately measure liquid velocity, and can transmit the signal of liquid level and liquid velocity of each lower machine to the upper machine, which can detect and display the signal of each lower machine on the upper machine. When the liquid level is lower than the set lower limit and the liquid flow rate is too high or too low, the upper computer and the corresponding lower computer can send sound and light alarm to remind the relevant personnel to deal with it in time. This system takes 8051 as the core, detects liquid level, liquid velocity and whether there are bubbles, thus can display, alarm. At the same time with the upper computer through wireless transmission of each lower computer data.
Keywords: liquid level detection, liquid flow detection, SCM control, wireless communication