Design And Study Of Data Collection System For The Torque Sensor Based On Ring Ball Gratings

In the various mechanical transmission systems, Torque is a typical mechanical parameter to reflect the dynamic performance and the labor status of mechanical transmission shaft, the testing technology has become necessary means of research and development, test and analysis, quality control, and fault diagnosis of various mechanical products. It's working conditions which is obtained by using torque sensor systems to collect large number of measured data, then being comparatived and analyzed, which can achieve the monitoring, diagnosis and control to dynamic characteristics of mechanical transmission system. avoid the occurrence of the major equipment accidents and make the production safe. So,measurement of the torque is always one of the hot spots which are devoted by many scientists at home and abroad now. With the development of productive forces, torque sensors not only to meet the requirements of accuracy, is also required to adapt to such high temperature and strong corrosion, strong shock and strong vibration, and other harsh industrial production environments.Funded by"Research on the principle of the ring-space array based on the sphericallysymmetric and the principal of electromagnetic induction"the project of NaturalScience Foundation Of Country and Doctoral Program of Higher Education Research Fund,the paper under the extreme conditions of ring ball gratings torque sensor depth research carried out, focusing on the torque sensor ring ball gratings data acquisition system was designed and studied for the realization of mechanical transmission of torque under extreme environments On-line dynamic measurement, a more systematic exploration and experimental research, for further study of mechanical transmission system under extreme conditions of work laid the foundation for torque measurement.From the view of engineering application, the paper discusses and researches structure and working principle of the Torque based on ring ball gratings, and analyses the impact of ring ball gratings to the output voltage of the collection coils within reader head when the mechanical transmission shaft is in working, according to the spherically symmetric and the principal of electromagnetic induction. The paper make a thorough discuss and study on data colletion system for the feature of the ring ball gratings torque sensor: We designed a lab equipment for torque measurement according to system requirements; Hardware circuit of system includes permeability electrocircuit within the reader head and control circuit of motor; Design software of motor contorl and data acquisition based on LabVIEW in order to control motor and collcet signal of sensor. At last, the test and experiment of system is carried out. The elementary error of the experiment data has been analysed.Using virtual instrument technology in order to a flexible software instead of solidifying hardware, the system reduces hardware circuits, takes from the influence of undesired signal caused by hardware circuits, makes measurement results more accurate, and also enhances the reliability, fexibility, universality and extendability of the system.