Multi-Wavelength Spectrometer Gain Control to Prevent Signal Saturation
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Solution Overview
Problem
Current spectrometers face challenges in accurately measuring bio-information, such as blood glucose, due to limitations in adjusting amplification gains for varying photoreaction properties of objects, leading to suboptimal signal processing and potential saturation issues.
Innovation Solution
A spectrometer system that includes a light source emitting multiple wavelengths, a detector, and a controller that sets optimal amplification gains for each wavelength based on photoreaction properties, using a Variable Gain Amplifier to prevent saturation and adjust light intensity, allowing for precise bio-information measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed amplification gain is used for all wavelengths, then the device complexity is reduced, but the measurement precision deteriorates due to inability to optimize for varying photoreaction properties
Solution Approach 1:
The patent implements a dynamic amplification gain adjustment mechanism where the controller automatically sets different amplification gains for different wavelengths based on photoreaction properties. This transforms the static amplifier into a dynamic system that adapts its gain settings, resolving the contradiction between measurement precision and device complexity by automating the optimization process.
Solution Approach 2:
The patent changes the amplification gain parameter according to wavelength and photoreaction properties. By making the amplification gain a variable parameter rather than a fixed value, the system can optimize measurement precision for each wavelength while the controller automates this parameter adjustment to manage complexity.
2Reliability
If high amplification gain is used for all wavelengths, then the signal strength is improved, but saturation occurs leading to loss of information
Solution Approach 1:
The patent applies local quality by setting different amplification gains for different wavelengths based on their specific photoreaction properties. Instead of using a uniform high gain for all wavelengths, the system tailors the gain setting to each wavelength's characteristics, ensuring optimal signal strength without causing saturation, thus preventing information loss.
Solution Approach 2:
The system incorporates feedback mechanisms where the controller monitors the detected optical signals and adjusts amplification gains accordingly. This feedback loop prevents saturation by reducing gain when signals approach saturation levels, thereby maintaining reliable signal strength while preventing information loss through saturation.
3Measurement precision
If wavelength-specific amplification gain adjustment is implemented, then the measurement accuracy is improved, but the ease of operation deteriorates due to complex gain setting procedures
Solution Approach 1:
The patent implements self-service by enabling the controller to automatically determine and set optimal amplification gains for different wavelengths based on photoreaction properties. This eliminates the need for manual gain setting by operators, thereby maintaining high measurement accuracy while restoring ease of operation through automation.
Solution Approach 2:
The system performs preliminary action by pre-calculating or pre-setting amplification gains for different wavelengths based on known photoreaction properties. This preliminary configuration allows the system to automatically apply appropriate gains without requiring real-time manual adjustment, thus improving measurement accuracy while maintaining ease of operation.
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
This approach enables accurate and non-invasive bio-information measurement by optimizing amplification gains for each wavelength, minimizing signal saturation and improving the accuracy of bio-data retrieval, such as blood glucose levels.
Implementation Method 1
a light source part configured to emit light of a plurality of wavelengths onto an object
Implementation Method 2
a detector configured to detect an optical signal of each of the plurality of wavelengths reflected by returning from the object
Data Source
AI summary
Provided is a spectrometer. The spectrometer includes: a light source part configured to emit light of a plurality of wavelengths onto an object; a detector configured to detect an optical signal of each of the plurality of wavelengths as reflected from the object; a controller configured to set an amplification gain for each of the plurality of wavelengths according to photoreaction properties of the object; and an amplifier configured to amplify an output signal of the detector by using the set amplification gain.