Research On Calibrating Device For Force Sensor

Dynamic calibration of force sensor is a difficult problem in engineering testing scope. To solve this problem, a calibrating device of force sensor which can do dynamic calibration is studied in this dissertation.On the basis of analysis and compare various options, the method of comparison is confirmed to be used to calibrate the force sensor. The actualization of comparison is that two force sensor——a criterion force sensor and a pending one, are loaded by the same force at the same time, then we can get the calibration results based on the comparing of the two outputs.Firstly, the device is motivated by the moment electromotor, and the force which is produced by the moment electromotor is enhanced by a ball screw and two hydraulic cylinders. In this way, a big loading output is produced when the device is transportable and the drive is small. The mechanical structure of the device is designed based on the mechanical transmission and then ANSYS is used to optimize the structure of the device. On the premise of minimizing the size and weight of the device that the elastic deformation of the device would be installed in less than 0.2mm.Secondly, Simulink which is a software package of MATLAB is used to analyze the designed system. From the results, the supreme operating frequency of the device is confirmed in 170Hz.Finally, research of the control system of calibrating device of force sensor is done. And function units and circuit principium is designed too.Self-acting dynamic calibration and self-acting static calibration feature the device. At present, there is no analogous device which can do the same job internally.Presently, more and more force sensors are used in a wide extension. Both the untapped and force sensors which have been used for a space have to be calibrated. Because the calibration device of force sensor which is put forward in this thesis is small in size, easy in manipulating and simple in result analysis, all the traits make it possible that the device has great practical value and a splendid future in the market.