Spectrometry Device Signal Switching for ADC Reduction
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Solution Overview
Problem
Conventional spectrometry devices require multiple analog-to-digital converters (ADCs) for processing multiple photodetectors, increasing product costs and circuit complexity when analyzing two types of gas components with different analytical wavelengths.
Innovation Solution
A spectrometry device with a switching unit that time-divides the output of reception signals, allowing a single conversion unit to process both signals, reducing the number of ADCs needed and optimizing analysis periods through controlled switching and timing adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple conversion units are used to process multiple reception signals simultaneously, then signal processing capability is improved, but product cost and circuit complexity increase
Solution Approach 1:
The patent implements periodic action by using a switching unit to time-division multiplex the reception signals. The switching unit alternates between connecting the first reception signal and the second reception signal to the single conversion unit in periodic cycles, enabling one conversion unit to process multiple signals sequentially rather than simultaneously
Solution Approach 2:
The patent merges multiple signal processing paths into a single path by combining the first and second reception signals through the switching unit. Instead of having separate conversion units for each signal, the system merges both signals into one temporal stream that feeds a single conversion unit, reducing component count while maintaining processing capability
2Reliability
If equal time periods are used for both reception signals, then processing fairness is improved, but analysis efficiency decreases
Solution Approach 1:
The patent applies local quality by assigning different time period weights to different signals based on their specific requirements. The control unit determines appropriate first and second time periods for the first and second reception signals respectively, allowing each signal to receive the time allocation needed for its specific analysis requirements rather than uniform treatment
Solution Approach 2:
The patent implements dynamics by making the time periods adjustable rather than fixed. The control unit dynamically determines the first time period and second time period based on the specific characteristics and requirements of each reception signal, enabling optimization of analysis efficiency for each signal type
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 reduces product costs and enhances analysis efficiency by shortening analysis periods and improving precision through signal processing like averaging, while maintaining equivalent signal-to-noise ratios for both signals.
Implementation Method 1
photodetectors for reference lights transmitted through the reference cells
Implementation Method 2
a switching unit that acquires a first reception signal and a second reception signal that respectively include information relating to an optical spectrum and switches between outputting the first reception signal and outputting the second reception signal
Implementation Method 3
a conversion unit that converts the first reception signal or the second reception signal output from the switching unit into a digital signal
Data Source
AI summary
A spectrometry device includes a switch and a converter. The switch acquires a first reception signal and a second reception signal that respectively include information relating to an optical spectrum and switches between outputting the first reception signal and outputting the second reception signal based on control by a controller. The converter converts the first reception signal or the second reception signal output from the switch into a digital signal.