US 11,215,509 B2Granted

Method for determining a temperature without contact, and infrared measuring system

AssigneeRobert Bosch GmbH

InventorsMichael Frank, Volkmar Senz, Michael Badeja, Axel Rumberg, Michael Krueger, Helge Dittmer

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Abstract

A method and an infrared measuring system for determining a temperature distribution of a surface without contact includes an infrared detector array with a detector array substrate and respective pluralities of measuring pixels and reference pixels. The measuring pixels are each connected to the detector array substrate with a first thermal conductivity, are sensitive to infrared radiation, and each provide a measurement signal for determining a temperature measurement value that depends on the intensity of the incident infrared radiation. The reference pixels are each connected to the detector array substrate with a second thermal conductivity and each provide a measurement signal for determining a temperature measurement value. The reference pixels are implemented as blind pixels that are substantially insensitive to infrared radiation. The temperature measurement values of the measuring pixels are corrected by a pixel-associated temperature drift component determined with reference to the temperature measurement values of the reference pixels.

Claims19

Dependent claims

A method for contactlessly establishing a temperature of a surface via an infrared measurement system that includes an infrared detector array with (i) a detector array substrate, (ii) a plurality of measurement pixels, which are each connected to the detector array substrate with a first thermal conductivity, wherein the measurement pixels are sensitive to infrared radiation and each provide a first measurement signal for establishing a first temperature measurement value which is dependent on an intensity of the incident infrared radiation, and (iii) a plurality of reference pixels, which are each connected to the detector array substrate with a second thermal conductivity and which each provide a second measurement signal for establishing a second temperature measurement value, the method comprising:

determining the second temperature measurement values indicated by the second measurement signals from the plurality of reference pixels using an evaluation apparatus of the infrared measurement system;
determining pixel-associated temperature drift components for the plurality of reference pixels with reference to the second temperature measurement values using the evaluation apparatus;
determining the first temperature measurement values indicated by the first measurement signals from the plurality of measurement pixels using the evaluation apparatus, the first temperature measurement values being indicative of a temperature of the surface;
and
correcting the first temperature measurement values with the pixel-associated temperature drift components using the evaluation apparatus,
wherein the reference pixels are configured as blind pixels that are substantially insensitive to infrared radiation, and wherein the second thermal conductivity is greater than the first thermal conductivity.

3 more elements

An infrared measurement system for contactlessly establishing a temperature distribution on a surface, comprising:

an evaluation apparatus;
and
at least one infrared detector array that includes:
a detector array substrate,
a plurality of measurement pixels, which are each connected to the detector array substrate with a first thermal conductivity, wherein the measurement pixels are sensitive to infrared radiation and each provide a first measurement signal configured to establish a first temperature measurement value TMP which is dependent on an intensity of the incident infrared radiation, and
a plurality of reference pixels, which are each connected to the detector array substrate with a second thermal conductivity and which each provide a second measurement signal configured to establish a second temperature measurement value,
wherein the reference pixels are configured as blind pixels that are substantially insensitive to infrared radiation, and wherein the second thermal conductivity is greater than the first thermal conductivity,
wherein the evaluation apparatus is configured to:
determine the second temperature measurement values indicated by the second measurement signals from the plurality of reference pixels,
determine pixel-associated temperature drift components for the plurality of reference pixels with reference to the second temperature measurement values,
determine the first temperature measurement values indicated by the first measurement signals from the plurality of measurement pixels, the first temperature measurement values being indicative of the temperature of the surface, and
correct the first temperature measurement values based on the pixel-associated temperature drift components.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/314,429Filed 14 Jun 2017
Priority: DE 10 2016 211 821.830 Jun 2016
Published: US 2019/0154512 A123 May 2019
Granted: 4 Jan 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

G01J 5/0265
Constructional details: handheld, portable
G01J 5/023
Shape of the cavity itself or of elements contained in or suspended over the cavity: particular leg structure or construction or shape; Nanotubes
G01J 5/024
Shape of the cavity itself or of elements contained in or suspended over the cavity: special manufacturing steps or sacrificial layers or layer…
G01J 5/0245
Shape of the cavity itself or of elements contained in or suspended over the cavity: for performing thermal shunt