Gas Sensor Temperature Matching for Accurate Instant Measurement
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Solution Overview
Problem
Conventional gas sensors experience decreased measurement accuracy when the temperature of the sensor differs significantly from the environment, requiring time for the sensor to reach an appropriate temperature before reliable measurements can be taken, leading to user wait times.
Innovation Solution
A gas sensor system with a control device that acquires temperature information for both the sensor and the ambient space, performing heating or cooling controls to align the sensor temperature with the ambient temperature before initiating measurements, using a heater and fan to manage air intake and discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the gas sensor is used outdoors or in environments with significant temperature differences, then the sensor can operate in diverse conditions, but measurement accuracy decreases due to temperature deviations
Solution Approach 1:
The patent changes the temperature parameter of the gas sensor by using a heater to warm the sensor when the temperature difference between the sensor and ambient environment exceeds a threshold. This parameter adjustment ensures the sensor operates at an optimal temperature range, maintaining measurement accuracy across diverse environmental conditions.
Solution Approach 2:
The system performs preliminary temperature adjustment of the gas sensor before measurement begins. By detecting the temperature difference in advance and warming the sensor proactively, the system ensures the sensor reaches appropriate operating temperature before actual gas measurement starts, preventing accuracy degradation.
2Measurement precision
If the system waits for the gas sensor to reach appropriate temperature before measurement, then measurement accuracy is maintained, but user wait time increases
Solution Approach 1:
The system performs temperature adjustment of the gas sensor in advance, before the user initiates a measurement request. By proactively warming the sensor when temperature difference exceeds the threshold, the sensor is already at optimal temperature when measurement starts, eliminating user wait time while maintaining accuracy.
Solution Approach 2:
The system automatically monitors the temperature difference between the gas sensor and ambient environment, and autonomously activates the heater when needed. This self-service mechanism eliminates the need for user intervention or waiting, as the system independently manages temperature compensation before measurements are requested.
3Measurement precision
If the heater is operated to warm the gas sensor, then measurement accuracy is improved, but energy consumption increases
Solution Approach 1:
The system changes the operational state of the heater based on the temperature difference parameter. The heater is activated only when the temperature difference between the gas sensor and ambient environment exceeds a predetermined threshold, and deactivated when the difference is within acceptable ranges, optimizing energy usage while maintaining measurement accuracy.
Solution Approach 2:
The system continuously monitors the temperature difference between the gas sensor and ambient environment, using this feedback to control heater operation. When the temperature difference exceeds the threshold, the heater is activated; when it falls within acceptable ranges, the heater is deactivated. This feedback-based control ensures energy is consumed only when necessary for maintaining measurement accuracy.
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 high-accuracy gas measurements without user wait times by ensuring the sensor is at an optimal temperature for measurement, preventing condensation and temperature-related errors.
Implementation Method 1
a heater that heats the gas sensor
Implementation Method 2
an air intake port and an air discharge port that are connected to the gas sensor
Data Source
AI summary
Provided are a gas sensor system, a gas sensor control device, and a control method that enable high-accuracy measurement without causing a user to wait. The gas sensor system (1) includes: a gas sensor (10) that performs concentration measurement of a measurement target gas in air; a heater (17) that heats the gas sensor; an air intake port (11) and an air discharge port (12) that are connected to the gas sensor; and a control device (20) that performs heating control of operating the heater so as to heat the gas sensor. The control device acquires temperature information for the gas sensor and temperature information for a space from which the air intake port takes in air and performs the heating control based on the temperature information for the gas sensor and the temperature information for the space from which the air intake port takes in air.