STIFFNESS MEASUREMENT METHOD AND DEVICE

摘要

A calculating device of the stiffness measurement device pressurizes an object to be measured with a predetermined pressure and the stiffness of the object to be measured in the squeal frequency band is calculated based on an inclination of a stress-displacement performance curve immediately after a start of depressurization after the pressurization. According to this device, there is no need to oscillate the object with a high frequency band and there is no need to enhance the stiffness of the housing of the measurement device, which leads to a downsizing of the device. Further, there is no need for measuring of acceleration speed of the object to be measured and accelerator can be eliminated to reduce the cost of the stiffness measurement device.

主权项

1. A stiffness measurement method for measuring a stiffness of an object to be measured in a squeal frequency band, the method comprising:
supporting step for supporting the object to be measured; a pressurizing step for pressurizing the object to be measured which has been supported; a gradual depressurizing step for gradually depressurizing the object to be measured after a pressure applied thereto by the pressurizing step has reached to a predetermined value; a measuring step for measuring the pressure applied to and the pressure depressurized from the object to be measured and a displacement of the object to be measured when the object to be measured is pressurized and depressurized at the steps of the pressurizing step and the gradual depressurizing step; and a calculating step for calculating the stiffness of the object to be measured in the squeal frequency band based on an inclination of a stress-displacement performance curve immediately after a start of the depressurizing step for gradually depressurizing the pressure applied to the object to be measured.