Automatic liquid concentration measuring method

Abstract

The invention relates to an automatic liquid concentration detection method and device. The device is simple in structure, simple to maintain, high in adaptability, low in working environment requirement, high in precision and accuracy and applicable to automatic detection of concentration of various solutions. The device comprises a single-chip microcomputer, a camera, a buoyance gauge, a temperature sensor, a solenoid valve, a sampling pump, measuring software and an LCD (liquid crystal display), wherein the single-chip microcomputer is connected with the camera, the temperature sensor, the LCD and the solenoid valve; the camera is connected with the single-chip microcomputer and used for acquiring an image signal of the buoyance gauge; the temperature sensor is connected with an input end of the single-chip microcomputer and used for detecting the temperature of a liquid in real time; the solenoid valve is connected with the single-chip microcomputer and used for switching the to-be-detected liquid or clear water for washing; the sampling pump is connected with the single-chip microcomputer and used for pumping the liquid into a sample tank. The single-chip microcomputer and the camera acquire an image of the buoyance gauge, concentration information of the liquid is acquired through calculation of the position of the buoyance gauge in the image, meanwhile, the temperature of the liquid is acquired, temperature correction is performed on the concentration, and the result is displayed by the LCD. Automatic measurement and online detection are realized.

Description

technical field [0001] The invention relates to an automatic measurement system for liquid concentration, in particular to a continuous on-line detection method and device for liquid concentration. Background technique [0002] In the process of industrial and agricultural production, there are a large number of liquid raw materials, intermediate products and finished products. Controlling the concentration of liquids is critical in the production process. In the current production, the method of intermittent sampling is often used for concentration determination. At present, there are many online concentration measurement products on the market. The principles include ultrasonic, ray, optical, pressure and other methods, but these generally have shortcomings such as insufficient accuracy and poor repeatability. The main reason is that the acquisition accuracy of the sensor is not enough. And it is easily affected by the environment and the flow of the liquid itself. Amon...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention combines image recognition technology and buoyancy hydrometer measurement technology to construct a new method for measuring liquid concentration using image processing technology, and to provide a system that can automatically measure liquid concentration on-line to solve the above background technology Some of the problems mentioned in the current online concentration measurement technology are low accuracy, poor long-term reproducibility and intermittent measurement.

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