Method and device for measuring discrete state granule graininess distribution

Abstract

The invention discloses a method and a measuring device thereof for measuring the granularity distribution of the particle in the discrete state, and the method and the measuring device thereof to the technical field of ultrasonic measurement. The invention aims at solving the technical problem of non contact measurement of the distribution of the particle granularity in the discrete state. The measuring device includes a computer which applies a complex wave number, a objective function, a distillation function and other calculation formulas to optimize the calculate the distribution of the particle granularity, a signal process circuit which is connected with the computer, a pulse wave launch / receive circuit which is connected with the signal process circuit, a broadband transducer which is connected with the pulse wave launch / receive circuit, and broadband transducer is arranged at the external side of a test plate. The measuring device is controlled by the computer, and the launch circuit sends out a pulse signal; a trigger transducer sends out the sound wave which is reflected by the wall of the test plate for a plurality of times and then is received by the transducer, and then the signal process circuit amplifies the signal, the high speed module coverts the signal and sends to the computer for processing. The invention is characterized in that the invention can completely realize the non contact measurement, and measure the high consistency and the two-phase flow of the high attenuation particle on line.

Description

technical field [0001] The invention relates to ultrasonic measurement technology, in particular to a technology for measuring particle size distribution and concentration of particles in a discrete state by using ultrasonic multiple reflection signals. Background technique [0002] The measurement of particle size and concentration of dispersed particles has a wide application background in the fields of power, chemical industry, medicine, environmental protection, water conservancy, materials and other fields involving two-phase flow. Compared with existing measurement methods such as sieving method, microscope method, holographic method, electric induction method, sedimentation method, etc., ultrasonic method often has a high degree of automation and can perform fast and accurate measurement. At the same time, because ultrasonic has a wide frequency range and strong penetrating ability, it can propagate in colored or even opaque substances and has fast measurement speed. ...

AI Technical Summary

Problems solved by technology

In the process of measuring high-concentration and high-attenuation substances, the sound path of ultrasonic waves is limited, so that the signal-to-noise ratio of the measurement signal is too small, and even effective acoustic signals cannot be detected, and the measurement process cannot be realized.

[0004] At the same time, most existing methods use ultrasonic waves of a single frequency, and do not pay attention to the relationship between particle size and ultrasonic spectrum, and the relationship between ultrasonic spectrum (impedance spectrum, attenuation spectrum, velocity spectrum) and particle size is very close

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