In order to solve the calibration problem of the clamping force for the cupping testing machine

a new force sensor exclusively is developed by adopting multi-components structure with single cylinder type

and the compensation circuit and software are used to correct nonlinear error so as to improve the accuracy of the sensor.The computer measuring system is adopted to evaluate the repetition and the stability of multi-components force sensor.The measuring result shows that the repetition of the components force sensor designed is less than 0.07%

and the stability of the long-term usage is better than 0.26%.