Acoustic Airflow Particle Sensing for Uniform Density Measurement
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Solution Overview
Problem
Existing particle measurement devices lack a standardized and efficient method for creating a uniform air flow, leading to inconsistent particle distribution and increased measurement errors due to particle settling or adherence to surfaces, which complicates accurate and reproducible particle density calculations.
Innovation Solution
A device incorporating a sound generation unit to create a controlled air flow using sound waves, combined with a light signal measurement to detect particle reflection, ensuring a homogeneous particle distribution and precise volume measurement, thereby stabilizing the measurement environment and reducing errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a pump or mechanical device is used to generate air flow in conventional particle measurement devices, then air flow can be generated, but the device complexity increases and the air flow is difficult to standardize
Solution Approach 1:
The patent replaces the mechanical pump system with an acoustic field-based air flow generation system. A sound generation unit emits sound waves that directly induce air flow without mechanical moving parts, thereby simplifying the device structure while enabling standardized and controllable air flow through acoustic parameters.
Solution Approach 2:
The patent controls air flow characteristics by changing acoustic parameters (frequency, amplitude, waveform) of the sound generation unit. This allows precise adjustment and standardization of air flow without complex mechanical control systems, resolving the contradiction between device simplicity and flow standardization.
2Measurement precision
If particles are measured in stagnant air, then the measurement setup is simple, but particles settle or adhere to surfaces causing measurement errors
Solution Approach 1:
The patent uses acoustic fields instead of mechanical agitation to prevent particle settling and adhesion. The sound waves create air movement that keeps particles suspended in the measurement volume, improving measurement accuracy without adding complex mechanical agitation devices.
3Productivity
If a complex measuring apparatus with pump-stimulated air flow is used, then particle measurement can be performed, but the device size increases and integration into compact devices becomes difficult
Solution Approach 1:
The patent replaces the bulky mechanical pump with a compact sound generation unit that produces air flow through acoustic waves. This dramatically reduces the device volume while maintaining the capability to generate controlled air flow for particle measurement, enabling integration into mobile and compact devices.
4Volume of moving object
If sound waves are used to generate air flow, then a compact design is achieved, but the air flow control mechanism becomes less intuitive
Solution Approach 1:
The patent controls air flow by adjusting acoustic parameters (frequency, amplitude) of the sound generation unit, which are easily controllable through electronic signals. This provides intuitive control over air flow characteristics while maintaining compact device dimensions, as electronic parameter adjustment is simpler than mechanical control.
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
The solution provides accurate, consistent, and faster particle density measurements by ensuring uniform air flow and controlled conditions, reducing measurement errors and enabling integration into compact devices like mobile phones and tablets.
Implementation Method 1
a sound generation unit which emits a sound signal for generating an air flow
Implementation Method 2
The light striking the particles is scattered by them and a part of the light is reflected back to the particle sensor
Implementation Method 3
a particle sensor, with which the particle measurement is performed as a reflection measurement
Data Source
AI summary
A device for particle measurement having a particle measuring apparatus. The device includes a particle sensor with light signal measurement, wherein the particle measuring apparatus is assigned a sound generation unit emitting a sound signal for generating an air flow. A method for particle measurement using such a device is also described.