Acoustic plate mode wave virtual array sensor system and liquid detection method based on same

Abstract

The invention provides an acoustic plate mode wave virtual array sensor system and a liquid detection method based on the system. The system comprises a micro controller module, a signal stimulation module, an acoustic plate mode wave virtual array apparatus module and a signal acquisition module. The method comprises the following steps: controlling the signal stimulation module to generate a high-frequency sinusoidal voltage signal with a certain frequency through the micro controller module; applying the signal to the input end of the acoustic plate mode wave virtual array apparatus module; generating an acoustic plate mode wave by using inverse piezoelectric effect; converting the acoustic plate mode wave transmitted to the output end of the acoustic plate mode wave virtual array apparatus module into a voltage signal with the inverse piezoelectric effect, wherein the propagation characteristic of the acoustic plate mode wave is affected by a liquid characteristic parameter loaded on the acoustic plate mode wave virtual array apparatus module; and measuring a phase difference and an amplitude ratio between an input voltage signal and an output voltage signal of the acoustic plate mode wave virtual array apparatus module through the signal acquisition module to detect the characteristic parameter of liquid. The system has the characteristics of small detection apparatus, small signal disturbance and the like.

Description

technical field [0001] The invention relates to a liquid sensor system, in particular to an acoustic plate wave virtual array sensor system and a detection method for parallel detection of multiple characteristic parameters of liquid, and belongs to the field of new sensors. Background technique [0002] The liquid sensor is mainly used to detect the characteristic parameters of the liquid itself, including the measurement of three mechanical parameters of density, bulk modulus and viscosity, and two electrical parameters of dielectric constant and conductivity. Liquid detection not only focuses on a single specific characteristic parameter of the liquid, but also hopes to be able to detect multiple characteristic parameters of the liquid in parallel. [0003] At present, there are many commonly used instruments or methods for measuring various characteristic parameters of liquids in industry. Commonly used instruments for measuring liquid density include float type density...

AI Technical Summary

Problems solved by technology

There are many deficiencies in existing instruments or measurement methods, such as large instrument volume, high price, cumbersome operation, many samples required, long response time, difficult data processing, low measurement accuracy, etc.

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