Dynamic Particle Size Distribution Measurement via Shear and Pressure
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Solution Overview
Problem
Conventional particle size distribution measuring apparatuses are unable to accurately evaluate the state of samples when their environment changes, as they measure particle size distribution under constant conditions.
Innovation Solution
A particle size distribution measuring apparatus that includes a light source, detectors, and a particle size distribution calculator, along with a force applying mechanism to change the pressure or shearing force applied to the sample, allowing for real-time measurement of particle size distribution changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sample is measured under constant conditions, then the measurement is simple and stable, but the measurement cannot reflect the sample's state in changing environments
Solution Approach 1:
The patent applies the dynamics principle by transforming the static measurement system into a dynamic one. A force applying mechanism is introduced to dynamically change the state of the sample (applying pressure or shearing force) during measurement, allowing the system to adapt to different environmental conditions and accurately reflect particle behavior in real-world scenarios
2Adaptability or versatility
If a force applying mechanism is added to change sample state, then the measurement reflects actual environment better, but the device complexity increases
Solution Approach 1:
The force applying mechanism is designed with multi-functionality to reduce overall device complexity. The same mechanism can apply different types of forces (pressure or shearing force) depending on measurement requirements, and the cell structure serves both as a containment vessel and as part of the force application system, thereby achieving adaptability without proportionally increasing complexity
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
Enables the measurement of particle size distribution changes in response to changes in pressure or shearing force, providing an accurate evaluation of the sample's state in conditions similar to its actual environment.
Implementation Method 1
a particle size distribution measuring apparatus that irradiates a sample with light and measures a particle size distribution of a particle group based on light scattered by the particle group contained in the sample
Data Source
AI summary
A particle size distribution measuring apparatus includes a light source that emits measurement light to a sample accommodated in a cell including a pair of light transmission plates separated from each other, one or a plurality of detectors that detects the measurement light scattered in the sample, and a particle size distribution calculator that calculates a particle size distribution of a particle group included in the sample based on output signals of the detectors. The particle size distribution measuring apparatus further includes a force applying mechanism that moves at least one of the light transmission plates to apply pressure or a shearing force to the sample in the cell, in which the particle size distribution calculator is configured to calculate the particle size distribution at the time when the pressure or the shearing force applied to the sample has changed from a first state to a second state.