Differential Acoustic Analysis for Low-Noise Oscillation Detection

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Solution Overview

Problem

Existing analysis devices and methods fail to accurately determine the oscillation patterns of substances due to low intensity signals being masked by background noise and interference, as they measure excitation oscillations rather than the substance's oscillations.

Innovation Solution

An analysis device with two identical sample containers, microphone apparatuses, and a differential amplifier, configured to compensate for in-phase parasitic oscillations, is used to determine the oscillation pattern of a substance without an excitation source, minimizing noise and interference by using identical sample containers, connecting lines, and a Faraday cage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If photoacoustic measurement with light excitation is used, then gas concentration can be measured, but the oscillation pattern of the substance itself cannot be determined because only excitation oscillation is measured

Engineering Contradiction:

Improveoscillation pattern determinationVSAvoidsubstance oscillation information

Core Design Contradiction:

Measurement precisionVSLoss of information

Solution Approach 1:

The invention extracts and eliminates the parasitic excitation oscillation component from the measurement system by using identical sample containers and differential measurement, allowing only the substance's natural oscillation pattern to be detected

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of using light excitation to generate oscillations (conventional approach), the invention inverts the approach by eliminating all excitation sources and measuring the substance's natural spontaneous oscillations

Inventive Principle:

Principle #13The other way round (Inversion)

2Measurement precision

If conventional measurement technology is used, then measurement can be performed, but low intensity oscillation signals disappear in background noise

Engineering Contradiction:

Improveoscillation pattern determinationVSAvoidbackground noise

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The measurement system is segmented into two identical sample containers, allowing differential measurement that separates the substance signal from background noise

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention converts the harmful background noise into a beneficial reference signal by measuring identical noise in both sample containers and subtracting it, leaving only the substance's oscillation pattern

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Measurement precision

If identical sample containers and differential amplifier are used, then parasitic oscillations can be compensated, but device complexity increases

Engineering Contradiction:

Improveparasitic oscillation compensationVSAvoidmeasurement system structure

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The invention creates an exact copy of the sample container and measurement path, allowing the copied system to serve as a reference for differential measurement and parasitic oscillation compensation

Inventive Principle:

Principle #26Copying

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 accurate determination of low-intensity oscillation patterns by compensating for parasitic oscillations and external interference, ensuring precise measurement of the substance's oscillations.

Implementation Method 1

the differential amplifier is formed to compensate for in-phase parasitic oscillations from both sample containers and to determine the oscillation pattern of the substance

Methodology Applied

Scientific EffectDifferential amplification:

Implementation Method 2

one of the microphone apparatuses is respectively arranged in the respective sample containers, wherein the microphone apparatuses are electronically coupled to the differential amplifier

Methodology Applied

Scientific EffectMicrophone transduction:

Data Source

PatentUS12596106B2Analysis device and method for determining an oscillation pattern of a substance

Publication Date: 2026.04.07 FR FUTURE1 FRANZISKA MICHL & RAIMUND HOFFMANN GBR

AI summary

The invention is a method and an analysis device for determining an oscillation pattern of a substance without using an excitation source for the substance. The analysis device comprises a central unit having two identical sample containers, two microphone apparatuses, and a differential amplifier; wherein: one of the microphone apparatuses is located in each of the sample containers; the microphone apparatuses are electronically coupled to the differential amplifier via respective connecting lines; the connecting lines are of identical design; and the differential amplifier is designed to compensate for in-phase parasitic oscillations from both sample containers and, when the substance is introduced into one of the two sample containers, to determine the oscillation pattern of the substance without using an excitation source for the substance.