Gas Detector Voltage Difference Segmentation for Response Speed
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Solution Overview
Problem
Conventional gas detectors have a long response time and are inefficient in distinguishing between harmful gases, particularly colorless and odorless gases like carbon monoxide, leading to unsatisfactory safety and unnecessary delays in identifying specific gases.
Innovation Solution
A method that divides the voltage difference between the output signal and environmental detection voltage into parts, captured by a microprocessor, allowing for faster detection processes and compensation of output signal voltage to account for temperature and humidity changes, triggering a warning device only when linear changes indicate harmful gas presence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the gas detector uses a conventional voltage-concentration curve diagram for detection, then the detection process is simple, but the response time is long and safety is unsatisfactory
Solution Approach 1:
The patent segments the detection process into multiple stages: environmental voltage detection, voltage difference calculation, linear relationship determination, and warning triggering. This segmentation allows the system to process detection data more efficiently and reduce response time while maintaining operational simplicity through structured decision-making.
Solution Approach 2:
The patent performs preliminary actions by continuously monitoring environmental detection voltage and pre-calculating voltage differences before actual gas detection is needed. The system pre-establishes linear relationship criteria and prepares warning triggers, enabling faster response when harmful gases are detected without delay for initial setup or analysis.
2Productivity
If the gas detector spends time determining the type of harmful gas, then identification accuracy is improved, but the detection efficiency decreases and safety is compromised
Solution Approach 1:
The patent extracts the critical function of harmful gas detection from the broader task of gas type identification. By focusing only on detecting the presence of harmful gases through voltage difference analysis and linear relationship testing, the system achieves high detection efficiency without wasting time on identifying specific gas types, which is unnecessary for safety alerts.
Solution Approach 2:
Instead of identifying gas types first and then determining harmfulness, the patent inverts the approach by directly detecting harmful gas presence through electrical signal analysis. The system triggers warnings based on voltage characteristics that indicate harmful gases, eliminating the need for prior gas type identification and significantly improving detection efficiency.
3Reliability
If the gas detector does not compensate for temperature and humidity changes, then the device complexity is reduced, but false alarms increase due to environmental voltage fluctuations
Solution Approach 1:
The patent implements feedback by continuously monitoring environmental detection voltage and using this information to adjust the output signal voltage. The system feeds back environmental voltage changes to compensate for temperature and humidity effects, maintaining detection accuracy without requiring complex external environmental sensors or compensation circuits.
Solution Approach 2:
The patent enables the gas detector to self-compensate for environmental effects by using its own environmental detection voltage measurements to adjust its output. The system serves itself by automatically correcting voltage fluctuations caused by temperature and humidity changes, eliminating the need for external intervention or complex compensation mechanisms.
4Speed
If the gas detector uses a predetermined detection time of 10 seconds, then the detection process is simple, but the detection speed is insufficient for rapid harmful gas presence
Solution Approach 1:
The patent makes the detection process dynamic by adjusting detection time based on voltage change characteristics. When linear voltage changes indicate harmful gas presence, the system triggers warnings immediately without adhering to fixed 10-second intervals. The detection time becomes flexible and responsive to actual gas concentration changes, significantly improving detection speed while maintaining simple control logic.
Data Source
AI summary
A method of enhancing judgment of a gas detector contains: dividing a voltage difference between an output signal voltage and an environmental detection voltage of the gas detector into several parts. Each of multiple detecting processes of the gas detector is captured by a microprocessor at the environmental detection voltage for ten times in each microsecond, and a predetermined detection time of each detecting process is 10 seconds. When the environmental detection voltage changes linearly, the predetermined detection time of each detecting process is shorten to 1/10 second/per time. After three successive detection processes change linearly, a warning device is started. Otherwise, the microprocessor compensates the output signal voltage and recovers the predetermined detection time when the environmental detection voltage changes so as to maintain the voltage difference at a certain value.