Evaluation and Analysis of Uncertainty in Sensitivity of Piezoelectric Force Sensors Using Impact Method
In order to evaluate the uncertainty of the dynamic sensitivity of piezoelectric force sensors under the impact force calibration device,a calibration model for horizontal mass block impact collision based on air bearing suspension support is first introduced.Then the acceleration is reproduced by the laser absolute method,and the impact test of the impact head with different hardness is carried out.Finally,the uncertainty of the measurement results of the dynamic sensitivity parameters of the force sensor is evaluated.The experimental re-sults show that the sensitivity uncertainty of the force sensor based on the laser absolute horizontal impact meth-od is Urel=1.0%,(k=2),which meets the calibration requirements for dynamic force sensors.
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维普
