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Method for correcting dilatometer measuring value

A calibration method and technology of measured values, applied in the direction of thermal expansion coefficient of materials, instruments, special data processing applications, etc., to ensure the accuracy and improve the sensitivity.

Inactive Publication Date: 2009-01-28
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

Therefore, the existence of indication drift is a reason for correction

Method used

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  • Method for correcting dilatometer measuring value
  • Method for correcting dilatometer measuring value
  • Method for correcting dilatometer measuring value

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Embodiment Construction

[0030] On the program-controlled dilatometer, the specific implementation process of the present invention is as follows:

[0031] (A) Based on the characteristics and testing requirements of the tested sample, select the standard sample and establish a calibration file corresponding to the above requirements.

[0032] 1. Establish a standard sample measurement state;

[0033] 2. Set the standard sample measurement mode: calibration

[0034] 3. Enter the length of the standard sample: 25mm;

[0035] 4. Input the pressure loaded on the standard sample: 25 ~ 35cN;

[0036] 5. Select the bracket material for standard sample measurement: quartz;

[0037] 6. Select the material of the standard sample: aluminum oxide;

[0038] 7. Set the initial temperature: 20°C;

[0039] 8. Set the final temperature: 800°C;

[0040] 9. Set the safety protection temperature: 810°C;

[0041] 10. Set the heating rate: 5°C / min;

[0042] 11. Set the heating mode: use the furnace to control the ...

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Abstract

The invention discloses a measured value correction method of a dilatometer, which comprises the following steps: (A) a standard sample that has the similar characteristics and the same size with a test sample is chosen, and heat expansion coefficients of the standard sample at different temperatures are measured and recorded under a selected temperature change condition; (B) heat expansion coefficients of the test sample at different temperatures are measured and recorded under the same condition; and (C) average coefficient of linear expansion of the test sample at different temperatures is computed according to a formula. The measured value correction method of the dilatometer ensures the accuracy of detected results and raises the sensitivity of the dilatometer.

Description

technical field [0001] The invention relates to the precise measurement of the physical properties of metal materials, in particular to a method for correcting the measured value of material expansion. Background technique [0002] The dilatometer is an instrument used to test the physical properties of metal materials. In order to ensure the accuracy of the dilatometer test data, it should be calibrated during the dilatometer measurement. [0003] The carrier correction method of carrier-based dilatometers with traditional, mechanical or optical sensors, which was once commonly used, is no longer applicable. [0004] The program-controlled dilatometer adopts the advanced differential method measurement principle. The expansion system consists of three parts: the sample to be tested, the push rod, and the sample carrier. The expansion displacement is the difference in thermal expansion between the "sample-push rod" and the "sample carrier". The displacement signal output by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/16G06F19/00
Inventor 华瑛孙时秋蔡士达
Owner BAOSHAN IRON & STEEL CO LTD
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