Research On The Key Technology Of Dynamic Measurement Under The Condition Of High Frequency Of Time-grating Sensor

Photoelectric or magnetoelectric sensors are most often used for measuring therotational speed of electronic currently. The time grating displacement transducer is a newkind of displacement sensor, the motor in high frequency is as the research object and moredepth analysis and research was made on how time grating displacement sensor to measurespeed. The main work of this project is as follows:(1) The theoretical foundation of the time grating displacement sensor---"time-spacetransformation theory" was studied. Relative motion of two coordinate systems wereestablished, the difference of the displacement of a coordinate system was showed.Thekey of the time grating displacement transducer dynamic measuring is to set up a constantspeed movement of the coordinate system.(2) The basic structure of the motor was analyzed. The motor are all composed ofstator and rotor. After passing on alternating current (ac), a rotating magnetic field in theair gap between the stator and rotor was created and the rotating magnetic fieldmathematical model was established.(3) The structure of the time grating displacement sensor and motor are similar, whichis also composed of stator and rotor. With three phase alternating current (ac) in timegrating displacement sensor, the gate of the air gap between stator and rotor will produce arotating magnetic field either.(4) Based on the principle of mutual inductor, common transformer and three-phasecoupling transformer, when the time grating signal was loaded on the motor, the motor canproduce a rotating magnetic field, which is needed in the "time-space transformationtheory".(5) The signal inducted by the stator and rotor passed a band-pass filter to filter outthe unwanted components. The final information was analyzed by the numeral simulationand actual oscilloscope.To sum up, the method of the time grating displacement sensor embedded in a motoris adopted to measure the speed of the motor in this project. According to the program, thestructure of the motor and the time grating displacement transducer and their respectiverotating magnetic field was compared. Based on the principle of three-phase coupling...