Ultrasonic particle size measurement device and ultrasonic measurement device
AssigneeNational University Corporation Kyoto Institute of Technology
InventorTomohisa Norisuye
Life of this patent
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Abstract
An ultrasonic particle size measurement device includes: a transducer for (i) receiving an ultrasonic pulse scattered after being emitted to a fine particle and (ii) generating a first scattering amplitude Ψ; and a particle size calculating section for calculating a particle size of the fine particle by calculating an amplitude r and a phase θ in accordance with a real part and an imaginary part, respectively, of a second scattering amplitude Ψ obtained by subjecting the first scattering amplitude Ψ to a Fourier transform.
Claims13
An ultrasonic particle size measurement device comprising:
- an ultrasonic wave receiver for (i) receiving an ultrasonic pulse scattered after being emitted to a fine particle sedimenting in a liquid and (ii) generating a first scattering amplitude Ψ (t,T) based on a propagation time t of the ultrasonic pulse and an observation time T with respect to motion of the fine particle;
- and
- a particle size calculating section for (i) generating a second scattering amplitude Ψ (f,T) obtained by subjecting the first scattering amplitude Ψ (t,T) to a Fourier transform in a direction of the propagation time t, (ii) calculating an amplitude r (f,T) and a phase θ (f,T) in accordance with a real part and an imaginary part, respectively, of the second scattering amplitude Ψ (f,T), and (iii) calculating a particle size of the fine particle in accordance with the amplitude r (f,T) and the phase θ (f,T).
An ultrasonic particle size measurement device comprising:
- an ultrasonic energy applicator for applying ultrasonic energy to a sample in which a fine particle is dispersed in a solution so as to induce an ultrasonic fine particle velocity in the fine particle, the ultrasonic fine particle velocity indicating a velocity of the fine particle induced by application of ultrasonic energy;
- a scattered wave receiver for receiving a scattered wave scattered by the fine particle in which the ultrasonic fine particle velocity has been induced;
- an ultrasonic fine particle velocity calculating section for calculating the ultrasonic fine particle velocity in accordance with the scattered wave received by the scattered wave receiver;
- and
- a particle size calculating section for calculating a particle size of the fine particle in accordance with the ultrasonic fine particle velocity calculated by the ultrasonic fine particle velocity calculating section.
Dependencies are inferred from the claim text.