Method and device for compensating temperature gradient effects

Patent metadata

Field	Value
Publication number	US-11740175-B2
Application number	US-202117504267-A
Country	US
Kind code	B2
Filing date	Oct 18, 2021
Priority date	Oct 19, 2020
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

In an embodiment a method for compensating a temperature gradient effect for gas concentration sensors includes variating a temperature gradient, measuring a variation of gas concentration depending on the variation of the temperature gradient, analysing a dependence of the gas concentration and the temperature gradient for setting up an error correction function and applying the error correction function to correct measured values of the gas concentration.

First claim

What is claimed is:

1. A method for compensating a temperature gradient effect for gas concentration sensors, the method comprising:
variating a temperature gradient;
measuring a variation of gas concentration depending on the variation of the temperature gradient;
analysing a dependence of the gas concentration and the temperature gradient for setting up an error correction function; and
applying the error correction function to correct measured values of the gas concentration.

2. The method of claim 1 , wherein the error correction function is a linear function.

3. The method of claim 1 , wherein the dependence of the gas concentration and the temperature gradient is analysed by a neuronal network.

4. A device comprising:
a sensor configured to measure gas concentrations; and
an analysing unit configured to:
analyse a dependence of a gas concentration on a temperature gradient during calibration of the sensor in order to set up an error correction function; and
apply the error correction function to measured values of the gas concentration after the calibration is completed,

wherein the device is configured to measure the gas concentrations independent of the temperature gradient.

5. The device of claim 4 , wherein the analysing unit comprises a neuronal network configured to analyse the dependence of the gas concentration on the temperature gradient.

Assignees

• Tdk Corp

Inventors

• König Matthias

Classifications

• G01N21/0332 Primary

  with temperature control (control of temperature G05D23/00; cryostats F17C3/08) · CPC title

• G01N21/61

  Non-dispersive gas analysers {(G01N21/3504 takes precedence)} · CPC title

• G01N21/74

  using flameless atomising, e.g. graphite furnaces · CPC title

• G01N2021/745

  Control of temperature, heating, ashing · CPC title

• G01N25/18 Primary

  by investigating thermal conductivity (by calorimetry G01N25/20; by measuring change of resistance of an electrically-heated body G01N27/18) · CPC title