Title:
LINEARITY MEASURING METHOD AND MEASURING DEVICE OF DYNAMIC RESPONSE CHARACTERISTIC OF STRAIN GAGE
Document Type and Number:
Japanese Patent JP3653545
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To solve the problem that highly reliable measurement can not be performed because dynamic linearity of a strain gage is not guaranteed in measurement of vibration or impact using the strain gage.
SOLUTION: The strain gage 4 which is an evaluation object is stuck on a metal bar 3, and a first missile 1 is allowed to collide with a first end face 6 of the metal bar 3 from an inside launching tube 7. The moving speed, the acceleration and the deformation at a second end face 8 generated when an elastic wave pulse generated by collision reaches the second end face 8 on the opposite side of the first end face 6 are measured by an interferometer, an acceleration sensor and a noncontact displacement sensor respectively. A dynamic strain ε1(t) working as an input signal into the strain gage 4 by the first missile 1 and an output εout,1(t) of the gage are determined by using a propagation theory of each strain and elastic wave introduced from measurement results. Similarly, a second missile 2 emitted from an outside launching tube 9 is allowed to collide, and additionally the first missile 1 and the second missile are allowed to collide simultaneously or with a minute time difference, and similar operation is performed, to thereby measure the dynamic linearity of the sensor.
Inventors:
Akira Umeda
Application Number:
JP2002097187A
Publication Date:
May 25, 2005
Filing Date:
March 29, 2002
Export Citation:
Assignee:
National Institute of Advanced Industrial Science and Technology
International Classes:
G01L25/00; G01B7/16; (IPC1-7): G01L25/00; G01B7/16
Domestic Patent References:
| JP8050073A | ||||
| JP63157029A | ||||
| JP2000283873A | ||||
| JP2001221697A |
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