Gas Sensor Signal Correction for Temperature Change Rate Effects

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Solution Overview

Problem

Existing gas sensors, particularly thermal conductivity type sensors, exhibit a temperature gradient dependence, leading to inaccurate gas concentration measurements due to the influence of temperature change rates, which are not adequately compensated in current technologies.

Innovation Solution

A method and device that vary the temperature gradient, measure the gas concentration variation, analyze the dependence of gas concentration on temperature gradient, and apply an error correction function, such as a linear function or neuronal network, to compensate for temperature-change-rate-dependent gas concentration signal variations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a measurement unit is heated to a constant temperature to prevent temperature gradients, then temperature gradient effects are eliminated, but the device complexity and energy consumption increase

Engineering Contradiction:

Improvemeasurement accuracyVSAvoidtemperature control system

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent implements a feedback mechanism where the temperature gradient is continuously monitored and used to dynamically correct gas concentration measurements. The system measures the temperature gradient, applies a pre-determined correction factor based on the relationship between temperature gradient and sensor output, and compensates the measurement in real-time, eliminating the need for complex constant temperature control

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent changes the approach from controlling temperature to correcting measurements. Instead of maintaining constant temperature, the system varies the temperature gradient and determines the corresponding gas concentration variations, establishing a correction model that transforms the measurement parameter based on temperature gradient conditions

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If thermal conductivity type sensors are used to measure gas concentration, then gas concentration detection is achieved, but temperature gradient dependent measurement errors occur

Engineering Contradiction:

Improvegas concentration measurementVSAvoidtemperature gradient effect

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent converts the harmful temperature gradient effect into a useful correction parameter. By systematically varying the temperature gradient and measuring the corresponding gas concentration signal variations, the system establishes a correction model that transforms the previously harmful temperature dependence into a predictable and correctable relationship

Inventive Principle:

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

Solution Approach 2:

The patent introduces a correction model as an intermediary between the temperature gradient and the gas concentration measurement. This correction model, derived from systematic variation experiments, acts as a mediator that compensates for the temperature gradient effect without requiring direct intervention in the temperature control or sensor operation

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12631607B2Method and device for compensating temperature change rate dependent effects

Publication Date: 2026.05.19 TDK CORP

AI summary

A method of analysing a variation in a gas concentration signal and setting up an error correction function to compensate for the temperature-change-rate-dependent gas concentration signal is provided. The method includes variating a change rate of the temperature, and measuring a resulting variation in a gas concentration signal.