Metal linear expansion coefficient measuring apparatus

A technology of linear expansion coefficient and measuring instrument, applied in the direction of material thermal expansion coefficient, etc., can solve the problems of high cost, inconvenient operation, cumbersome space occupation, etc., and achieve the effect of low cost, convenient operation and small size
CN101393147AInactive Publication Date: 2009-03-25XIANGFAN UNIVERSITY
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
XIANGFAN UNIVERSITY
Publication Date
2009-03-25
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention provides a linear swelling coefficient measuring apparatus for metals. The upper part of a bracket of the measuring apparatus is provided with a displacement sensor and a micrometer head which correspond up and down, while the corresponding lower part is provided with a container which can be heated; when used, the container can be filled with water which can be heated, a metal to be detected is placed in the middle of the container vertically, and the upper part of the metal is contacted with the displacement sensor; the container is provided with a temperature sensor connected with a digital thermometer through a conducting wire, and the displacement sensor is provided with the conducting wire connected with a digital voltmeter. The linear swelling coefficient measuring apparatus for the metals can be applied to measuring metallic swelling coefficient in manufacture and building industries through the linear swelling coefficient of the metal measured by the digital thermometer and the digital voltmeter after the metal to be detected is placed in the container and heated by water.
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Description

technical field

[0001] The invention relates to an instrument for measuring and calculating metal expansion coefficient, in particular to a metal linear expansion coefficient measuring instrument. Background technique

[0002] At present, the structure of the known metal linear expansion coefficient measuring instrument is composed of a ruler-reading telescope, an optical lever, a ruler-reading telescope with a scale fixed on a bracket, a metal rod to be measured and a bracket, a thermometer and a heater. During the measurement, when the metal rod to be tested is heated, the metal rod to be tested starts to expand and drives the angle of the plane mirror of the optical lever connected to it to change. The observer observes the change of the scale on the ruler from the ruler-reading telescope, and then reads the change of the corresponding temperature from the mercury thermometer. The formula: metal linear expansion coefficient = change of metal length / change of metal tempe...

Claims

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