Impact response evaluation of force transducer for use in falling weight deflectometer system

Yusaku Fujii; Takahiro Fujyu; Haruki Okano

doi:10.1117/12.821222

12 January 2009 Impact response evaluation of force transducer for use in falling weight deflectometer system

Yusaku Fujii, Takahiro Fujyu, Haruki Okano

Proceedings Volume 7133, Fifth International Symposium on Instrumentation Science and Technology; 71330L (2009) https://doi.org/10.1117/12.821222
Event: International Symposium on Instrumentation Science and Technology, 2008, Shenyang, China

Abstract

The impact response of a force transducer in a falling weight deflectometer system is evaluated by an optical method. In the method, a mass is made to collide with a force transducer and the impact force is measured highly accurately as the inertial force acting on the mass. A pneumatic linear bearing is used to realize linear motion with a sufficiently small friction acting on the mass, i.e., the moving part of the bearing. The method is an improved variation of the Levitation Mass Method, which has been proposed and developed by the first author. The impact force, which has a maximum value of approximately 1.66 kN and a full width at half maximum of approximately 5.0 ms, has been applied and measured using the Levitation Mass Method with the standard uncertainty of approximately 3.3x10 N. This corresponds to 2x10^-2 (2%) of the maximum applied force in the experiments. The present status of the method and the points to be considered for the future improvements are discussed.

Citation Download Citation

Yusaku Fujii, Takahiro Fujyu, and Haruki Okano "Impact response evaluation of force transducer for use in falling weight deflectometer system", Proc. SPIE 7133, Fifth International Symposium on Instrumentation Science and Technology, 71330L (12 January 2009); https://doi.org/10.1117/12.821222

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