Microbubble Dispersion Measurement Using Magnetic Particle Differentiation
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Solution Overview
Problem
Conventional methods for measuring microbubble dispersion liquids cannot distinguish between nano-level diameter bubbles and nano-order fine solid particles, as they have similar sizes and optical techniques fail to differentiate between them.
Innovation Solution
A method involving irradiation with illumination light, application of a time-varying magnetic field, and detection of scattered light using a light detection device to differentiate between microbubbles and solid particles based on brightness, along with additional steps to measure concentration and particle size distributions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional optical measurement methods (dynamic light scattering, particle trajectory tracking) are used to measure fine particles in dispersion liquid, then the concentration and particle size distribution can be measured, but the method cannot distinguish between nano-level diameter bubbles and solid particles
Solution Approach 1:
The patent introduces a magnetic field as an intermediary to differentiate between microbubbles and solid particles. By applying a time-varying magnetic field, paramagnetic solid particles experience magnetic force that affects their Brownian motion trajectories, while non-magnetic microbubbles remain unaffected. This intermediary magnetic field enables the measurement system to distinguish between the two particle types based on their differential responses to the magnetic field.
2Measurement precision
If optical measurement techniques are used to detect scattered light from fine particles, then concentration and particle size can be measured, but the measurement accuracy is compromised when both microbubbles and solid particles are present
Solution Approach 1:
The patent segments the measurement process into two distinct phases: first, optical measurement of scattered light to detect all fine particles (both microbubbles and solid particles); second, magnetic field application to selectively affect solid particles. By segmenting the measurement and differentiation processes, the system can first obtain concentration data from optical scattering, then use magnetic field effects to isolate and identify solid particle contributions, thereby improving overall measurement accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Accurately distinguishes and measures characteristics of microbubble dispersion liquids by differentiating between microbubbles and solid particles, enabling precise measurement of concentration and particle size distributions with high accuracy.
Implementation Method 1
detecting scattered light generated from fine particles contained in the liquid under test by emission of the illumination light
Implementation Method 2
applying a time-varying magnetic field to the liquid under test within an irradiation area with the illumination light
Implementation Method 3
the particle size of the nano-level diameter bubbles is about the same as or smaller than the wavelength of light, the presence or absence of the nano-level diameter bubbles in a microbubble dispersion liquid cannot be confirmed visually. Further, techniques such as a dynamic light scattering method and a particle trajectory tracking method are known as techniques to optically measure the concentration and particle size distribution of fine particles that perform Brownian motion
Data Source
AI summary
A measuring method and a measuring system of a microbubble dispersion liquid for measuring characteristics of the microbubble dispersion liquid while distinguishing between fine particles and differentiating them into microbubbles and solid particles is disclosed. A measuring system measures characteristics of a microbubble dispersion liquid under test, and the system includes a microcapillary holding the liquid under test, a laser device irradiating the liquid under test inside the microcapillary with laser light, a magnetic device that applies a time-varying magnetic field to the liquid under test within the irradiation area with laser light, a digital microscope detecting scattered light generated from fine particles contained in the liquid under test by irradiation with laser light, and a measurement device that measures characteristics of the test liquid by distinguishing between the fine particles and differentiating them into microbubbles and solid particles based on the brightness of scattered light detected by the microscope.