Particle Recovery Flow Cell with Swept-Frequency Standing Waves
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Solution Overview
Problem
Existing particle recovery methods using ultrasonic waves for liquid samples with varying densities result in unstable recovery rates due to variations in ultrasonic wave frequency requirements based on liquid density, making it challenging to consistently concentrate particles.
Innovation Solution
A particle recovery device and method that employs a standing wave generation system using ultrasonic waves with a frequency sweep between a first, second, and third frequency to stabilize particle recovery across varying liquid densities, focusing particles at a node within the flow path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ultrasonic wave of single frequency is applied to generate standing wave for particle recovery, then particle concentration can be achieved, but recovery rate varies with liquid sample density making it unstable
Solution Approach 1:
The ultrasonic wave frequency is changed from a fixed single frequency to a dynamic frequency sweep that continuously varies between a first frequency and a second frequency. This dynamic frequency adjustment allows the system to adapt to different liquid sample densities, ensuring stable particle recovery rates across varying sample conditions.
Solution Approach 2:
The frequency parameter of the ultrasonic wave is swept through a range from a first frequency to a second frequency rather than maintaining a constant value. This parameter change enables the system to compensate for variations in liquid density, maintaining consistent standing wave formation and particle recovery performance across different sample types.
2Reliability
If ultrasonic wave frequency is fixed for standing wave generation, then device operation is simple, but recovery rate varies for each liquid sample
Solution Approach 1:
The frequency control mechanism implements a continuous frequency sweep between a first frequency and a second frequency during ultrasonic wave application. This dynamic frequency variation compensates for liquid sample density differences, ensuring consistent particle recovery rates across different samples while maintaining relatively simple device operation.
3Reliability
If single frequency ultrasonic wave is used, then energy consumption is low, but particle recovery is unstable across different urine samples
Solution Approach 1:
The ultrasonic wave frequency is swept through a range from a first frequency to a second frequency rather than maintaining a single fixed frequency. This parameter variation enables the system to adapt to different liquid densities, achieving stable particle recovery rates across different urine samples while managing energy consumption through controlled frequency modulation.
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
Stabilizes particle recovery rates by adjusting frequency to match varying liquid densities, improving concentration efficiency and reducing variability in recovery processes.
Implementation Method 1
a flow path filled with a liquid sample containing particles is irradiated with an ultrasonic wave to form a node of a standing wave in the flow path
Implementation Method 2
particles focused on the node of the standing wave are recovered
Implementation Method 3
an ultrasonic transducer is attached to one of the sides of a solid cell
Data Source
AI summary
A particle recovery device for recovering particles contained in a liquid sample, the particle recovery device comprising:a flow cell having a flow path through which the liquid sample flows;standing wave generating means that applies, in the flow path, an ultrasonic wave that sweeps between a second frequency that is a frequency lower than a first frequency that is a frequency of the ultrasonic wave that generates a standing wave having a predetermined number of nodes in the flow path and a third frequency that is a frequency higher than the first frequency; andrecovery means that recovers the particles focused in the flow path by the standing wave generated by the standing wave generating means.