Universal liquid concentration supersonic-detection method and universal liquid concentration supersonic-detection device

Abstract

The invention discloses a universal liquid concentration supersonic-detection method and a universal liquid concentration supersonic-detection device. The universal liquid concentration supersonic-detection method is characterized in that because of different supersonic velocities of supersonic wave in different mediums, according to known sonic path distances, sonic travel time in the detected liquid is measured; and the measured value is corrected by real-time temperature values so that percentage contents of different solutes in different solvents are obtained. Through sampling of supersonic wave propagation velocities in different solvents and solutes at different temperatures, sampling results are obtained, and through the sampling results, a corresponding relationship formula of the supersonic velocities of supersonic wave in the solutions, and the temperatures and the concentrations is worked out so that liquid concentration measurement universality is realized. Through measurement of supersonic velocities in air and in purified water under laboratory conditions, the method and the device realize correction of system hardware errors and sonic path distance errors and improve a measurement precision.

Description

technical field [0001] The invention relates to the technical field of on-line detection of liquid concentration, in particular to a universal ultrasonic liquid concentration detection method and device. Background technique [0002] In chemical, pharmaceutical, grain and oil, coal mining and other production sectors, there are a large number of raw materials, intermediate products and final products in solution state. Many chemical production still use the method of intermittent sampling and chemical titration for concentration analysis. This method requires manual sampling and visual reading, so it takes a long time to obtain results, and the detected liquid concentration accuracy is low. Ultrasonic waves are pollution-free and noise-free, and will not cause any adverse effects on the environment. The speed of sound propagating in liquids with different concentrations is different, so ultrasonic waves can be used to realize online detection of liquid concentration. But a ...

AI Technical Summary

Problems solved by technology

But a key factor is that temperature has a great influence on the speed of sound, which will directly affect the measurement accuracy of liquid concentration.

In order to overcome the influence of temperature on the measurement accuracy, the method of directly comparing the data at different temperatures is often used to reduce the measurement error. However, this method not only has a large amount of data storage, but also has a complicated calculation process, and cannot establish the relationship between sound velocity and temperature. The corresponding relationship between external interference is often misdetected and cannot be ruled out

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