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Method for measuring the temperature of a medium and thermometer for carrying out the method

Assignee: Mk Juchheim & Co GmbH
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Filing: 1985-07-29
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Granted: —
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Expires: 2005-07-29
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Abstract

Abstract The invention relates to a method of measuring the temperature of a medium by means of an electrically operating temperature sensor whose measurement signal varies in accordance with an e function. In the method at equal time intervals apart three temperature measured values are detected. From the second and from the first temperature measured values a first difference is formed and from the third and from the second temperature measured values a second difference. If the differences formed are smaller than a predetermined limit value one of the detected temperature values is displayed as the temperature of the medium to be measured. If however the differences formed are greater than the predetermined limit value the temperature of the medium is determined using the detected temperature values by a single extrapolation. The thermometer for carrying out the method includes an evaluation circuit comprising a microprocessor (10) which interrogates the temperature sensor (5) during a measuring operation at equal intervals of time, stores the temperature values detected and from the stored temperature values determines the temperature of the medium and supplies it to a display unit (7).

Inventors

  • 👤 Heinrich Brenninger
  • 👤 Günter Heinecke
  • 👤 Vaclav F. Vilimek
  • 👤 Joachim Goldmann
  • 👤 Winfried Schuchert

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-27 20:48
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/42

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 130 words
Method for measuring the temperature of a medium by means of an electrically operating temperature sensor whose measurement signal varies in accordance with an e function, three temperature measurement values being detected at equal intervals of time apart, characterized in that from the second and from the first temperature measured value a first difference is formed and from the third and from the second temperature measured value a second difference and that when the differences formed are smaller than a predetermined limit value one of the detected temperature measured values is displayed as the temperature of the medium to be measured whereas when the differences formed are greater than the predetermined limit value the temperature of the medium is determined using the detected temperature measured values by a single extrapolation.
Claim 2
Dependent Claim 130 words
Method for measuring the temperature of a medium by means of an electrically operating temperature sensor whose measurement signal varies in accordance with an e function, three temperature measurement values being detected at equal intervals of time apart, characterized in that from the second and from the first temperature measured value a first difference is formed and from the third and from the second temperature measured value a second difference and that when the differences formed are smaller than a predetermined limit value one of the detected temperature measured values is displayed as the temperature of the medium to be measured whereas when the differences formed are greater than the predetermined limit value the temperature of the medium is determined using the detected temperature measured values by a single extrapolation.
Claim 3
Dependent Claim 64 words
Method according to claim 1, characterized in that prior to execution of the extrapolation the second difference is subtracted from the first difference and when the result of this subtraction is smaller than a second predetermined limit value with delay a further three temperature measured values are detected on which the evaluation is based instead of on the three firstly detected temperature measured values.
Claim 4
Dependent Claim 96 words
Electronic thermometer for carrying out the method according to claim 1 or 2, comprising a temperature sensor, a display unit, an evaluation circuit for temperature measurement signals obtained from the sensor and a current source for the evaluation circuit and the display unit, characterized in that the evaluation circuit comprises a microprocessor (10) which interrogates the temperature sensor (5) in a measuring operation at equal intervals of time, stores the temperature measured values thereby detected and from the stored temperature measured values determines the temperature of the medium and supplies it to the display unit (7).
Claim 5
Dependent Claim 21 words
Thermometer according to claim 3, characterized in that the microprocessor (10) determines the temperature of the medium by a single extrapolation.
Claim 6
Dependent Claim 18 words
Thermometer according to claim 3 or 4, characterized by a control key (8) for initiating a measuring cycle.
Claim 7
Dependent Claim 38 words
Thermometer according to claim 4, 5 or 6, characterized in that the microprocessor automatically periodically initiates the execution of a measuring cycle at time intervals which are very long in comparison with the duration of a measuring cycle.
Claim 8
Dependent Claim 21 words
Thermometer according to any one of claims 4 and 6, characterized by an erasable memory (16) for storing a maximum temperature.
Claim 9
Dependent Claim 20 words
Thermometer according to any one of claims 4 to 7, characterized by a non-erasable memory (20) for a maximum temperature.
Claim 10
Dependent Claim 20 words
Thermometer according to any one of claims 4 to 8, characterized by an erasable memory (17) for a minimum temperature.

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