Particle size distribution measurements of particles and droplets using optical gel electrophoresis
US-2016123924-A1 · May 5, 2016 · US
Ultrasonic particle size measurement device and ultrasonic measurement device
US10101256B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10101256-B2 |
| Application number | US-201615549734-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 28, 2016 |
| Priority date | Feb 12, 2015 |
| Publication date | Oct 16, 2018 |
| Grant date | Oct 16, 2018 |
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Abstract
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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.
First claim
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The invention claimed is: 1. 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). 2. The ultrasonic particle size measurement device as set forth in claim 1 , wherein the particle size calculating section calculates a motion velocity of the fine particle in accordance with the amplitude r (f,T) and the phase θ (f,T) and calculates the particle size in accordance with the motion velocity. 3. The ultrasonic particle size measurement device as set forth in claim 1 , wherein the particle size calculating section generates a complex correlation function in accordance with the amplitude r (f,T) and the phase θ (f,T) and calculates the particle size in accordance with the complex correlation function. 4. The ultrasonic particle size measurement device as set forth in claim 3 , wherein: the particle size calculating section generates the complex correlation function represented by the following equation: [ Math . 2 ] g ( 1 ) ( f , τ ) = 〈 ψ ( f , T ) ψ * ( f , T + τ ) 〉 T 〈 ψ ( f , T ) ψ * ( f , T ) 〉 T ; and the particle size calculating section calculates the particle size in accordance with the complex correlation function. 5. The ultrasonic particle size measurement device as set forth in claim 1 , wherein the particle size calculating section rewrites the second scattering amplitude Ψ (f,T) by use of the amplitude r (f,T) and the phase (f,T), generates a complex correlation function by use of the second scattering amplitude Ψ (f,T) and a conjugate form of the second scattering amplitude Ψ (f,T), and calculates the particle size in accordance with the complex correlation function. 6. The ultrasonic particle size measurement device as set forth in claim 1 , wherein the particle size calculating section calculates the particle size of the fine particle in accordance with the second scattering amplitude represented by the following equation: [ Math . 1 ] ψ ( f , T )
Assignees
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Classifications
Solids in liquids · CPC title
by measuring attenuation of acoustic waves · CPC title
- G01N29/024Primary
by measuring propagation velocity or propagation time of acoustic waves · CPC title
Investigating particle size or size distribution (by measuring osmotic pressure G01N7/10; investigating sedimentation of particle suspensions G01N15/04; investigating individual particles G01N15/10) · CPC title
Average size only · CPC title
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- What does patent US10101256B2 cover?
- 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 par…
- Who is the assignee on this patent?
- Nat Univ Corp Kyoto Inst Technology
- What technology area does this patent fall under?
- Primary CPC classification G01N29/024. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Oct 16 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).