The Design And Implementation Of A Velocity Measure System Of Rocket Sled Based On TMR

The goal which is pursued constantly by national military field is the in depth exploration of weapons performance.As an important method of speed simulation on the ground,rocket sled test can achieve the equipment performance assess by its accurate measurement of the speed,which is very significant.The paper studied the speed measurement system in rocket sled test,and designed a rocket sled speed system based on TMR.Firstly,it analyzed and studied the characteristics and technical requirements of the rocket sled test,and determined the principle of measurement is the average speed instead of instantaneous speed.Secondly,according to the signal characteristics of TMR magnetic sensor,the spatial magnetic field of TMR sensor is modeled and simulated by Max Well.It is shown that the X-axis radial magnetizing magnet is used as the sensing element to make the TMR sensor produce sharper induction signal.On this basis,the design and implementation of the system hardware circuit design: including TMR sensor detection and acquisition board and master control board,Ethernet transmission module,wide voltage power supply module.And for the master control board configuration of the underlying related drive,transplant Lw IP protocol,the design of midpoint calculation procedures,the preparation of C/S framework of the server-side program.The system calculates the rocket sled speed by acquiring the time interval of the adjacent child nodes,and controls the network connection status with the master control board and computer to carry on the data transmission.In this paper,the Gaussian curve fitting algorithm based on trust region is used to solve the peak value of the original data,which solves the problem of lower data processing and low peak solution efficiency,and improves the speed of the system.Finally,the paper built the test environment and tested the function and performance of system.The test data shows that the system can achieve accurate measurement of different speed of moving objects,and achieve the desired design goals.