Sound-Induced EM Measurement with Inverse Diffusion Noise Separation
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Solution Overview
Problem
Existing methods for measuring the characteristics of objects like human bodies or metals using sound-induced electromagnetic fields face limitations such as reverberation electromagnetic noise, restricted measurement distance, and reduced spatial resolution, leading to impaired signal sensitivity and longer measurement times.
Innovation Solution
A characteristics measurement device and method that employs a sound wave generator, receiver, inverse diffuser, and measurement unit to separate and inversely diffuse electromagnetic fields, using reference signals to extract electrical, magnetic, and electromechanical characteristics, while suppressing reverberating electromagnetic fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the distance between the sound wave generator and the object to be measured is reduced to avoid reverberation electromagnetic noise, then signal sensitivity is improved, but the degree of freedom of measurement is impaired
Solution Approach 1:
The invention converts the harmful reverberation electromagnetic noise into a useful signal by using it as a reference for inverse diffusion processing. The noise that was previously obstructing measurement is now utilized to identify and eliminate similar noise components in the received electromagnetic field, thereby improving signal sensitivity without restricting measurement distance
Solution Approach 2:
The invention introduces inverse diffusion processing as an intermediary technique between the sound wave generator and the measurement system. This processing method acts as a mediator that separates the target electromagnetic field from reverberation noise, allowing measurements to be performed at various distances without the noise directly affecting measurement quality
2Productivity
If amplitude-modulated sound wave is used to shorten measurement time, then productivity is improved, but spatial resolution in the depth direction is reduced
Solution Approach 1:
The invention uses periodic sound waves (including amplitude-modulated waves) to efficiently measure object characteristics within a shortened time frame. By utilizing the periodic nature of the waves and applying inverse diffusion processing, the system achieves fast measurement while maintaining the ability to resolve spatial characteristics through signal processing
Solution Approach 2:
The invention changes the parameters of the sound wave (such as using amplitude modulation) to optimize measurement speed, while compensating for any loss in spatial resolution through inverse diffusion processing. The processing restores and enhances spatial resolution by eliminating noise and extracting meaningful signal components
3Productivity
If the distance between sound wave generator and object is known in advance to shorten measurement time, then productivity is improved, but degree of freedom of measurement is impaired
Solution Approach 1:
The invention implements feedback through inverse diffusion processing, where the received electromagnetic field (including reverberation noise) is used as a reference to process and enhance the target signal. This feedback mechanism allows the system to adapt to different measurement distances and conditions automatically, eliminating the need for advance distance knowledge while maintaining fast measurement capability
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 reduces measurement time, improves signal-to-noise ratio, and eliminates distance restrictions, enabling faster and more accurate extraction of characteristics like electric field, dielectric constant, magnetization, and piezoelectric properties.
Implementation Method 1
a sonic-induced electromagnetic field, which enables the object to be measured
Implementation Method 2
an inverse diffuser that inversely diffuses the electromagnetic field received by the receiver using a reference signal associated with the sound wave
Data Source
AI summary
A characteristics measurement device for an object according to the invention comprises a sound wave generator that emits a sound wave; a receiver that receives from the object an electromagnetic field generated by the sound wave being irradiated to the object; a sound wave medium between the sound wave generator and the object the electromagnetic field separated from a reverberating electromagnetic field caused by reverberating vibrations of the sound wave generator in time; an inverse diffuse that inversely diffuses the electromagnetic field received by the receiver using a reference signal associated with the sound wave; and a measurement unit that extracts at least one characteristic selected from a group consisting of electrical characteristics, magnetic characteristics, electromechanical characteristics and magnetomechanical characteristics of the object based on at least one measurement selected from a group consisting of intensity, phase and frequency of the inversely diffused electromagnetic field.