Method for accurately measuring three-dimensional deformation of tested piece in high-low temperature chamber
A technology of high and low temperature box and measurement method, which is applied to measurement devices, uses stable tension/pressure to test material strength, instruments, etc., can solve problems such as poor measurement accuracy, achieve high-precision measurement, and overcome additional disturbances.
Inactive Publication Date: 2012-06-13
ZHEJIANG UNIV OF TECH
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[0004] In order to overcome the shortcomings of poor measurement accuracy when measuring the three-dimensional deformation of the measured point when the bending stiffness test is performed on the tested piece in the existing high and low temperature chamber, the present invention provides a high and low temperature chamber with high measurement accuracy. A high-precision measurement method for the three-dimensional deformation of the test piece
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[0013] The present invention will be further described below in conjunction with the drawings.
[0014] Reference figure 1 with figure 2 , A high-precision measurement method for the three-dimensional deformation of the test piece in the high and low temperature box. The test point of the test piece is moved outside through the hanging rope. The hanging rope is located outside the high and low temperature box and connected by the hanging rope For the test piece, the movement track of a small mass suspended on a hanging rope is used to replace the movement track of the test piece after being subjected to a force for routine measurement outside the high and low temperature box. The small mass is a permanent magnet.
[0015] The device used in the method includes a suspension rope, a permanent magnet 1 and three laser displacement sensors 2, 3, 4. The upper end of the suspension rope is connected with the tested object, the lower end of the suspension rope is suspended with permanent...
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The invention discloses a method for accurately measuring three-dimensional deformation of a tested piece in a high-low temperature chamber. The test point of the tested piece is moved outwards by using a suspension rope; the suspension rope is connected with the tested piece; the suspension rope is positioned outside the high-low temperature chamber; the movement locus of a small mass block suspended on the suspension rope is used for replacing the movement locus of the stressed tested piece for performing conventional measurement outside the high-low temperature chamber; and the small mass block is a permanent magnet. The invention provides a method for accurately measuring three-dimensional deformation of the tested piece in the high-low temperature chamber at high measuring accuracy.
Description
Technical field [0001] The invention relates to a three-dimensional deformation measuring device, in particular to a method for measuring the three-dimensional deformation of a measured point when performing a bending stiffness test on a measured part in a high and low temperature box. Background technique [0002] The bending stiffness stiffness test needs to apply a force to the tested part in a certain direction. Under the action of the force or torque, the tested part deforms, and the stiffness is calculated by measuring the deformation in the direction of the force. However, the shape of the tested part is irregular. In addition to the deformation in the direction used for stiffness calculation under the action of external force, rotation in the three directions of x, y, and z and deformation in the other two directions may also occur. Even if the acting force or torque does not change, the force arm changes due to the deformation of the measured point, which affects the tor...
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Inventor 单晓杭孙建辉彭廷红郑欣荣丁少杰
Owner ZHEJIANG UNIV OF TECH