The Development Of Digital Rare Earth Giant Magnetostrictive Transducer Drive System

The rare-earth giant magnetostrictive transducer,having characteristics of high conversion efficiency,wide frequency response,high output amplitude and stable performance,is a type of controllable energy converter and widely used in engineering detection,medical equipment,industrial processing,military sonar and other fields.But it needs to be used in conjunction with the driving power supply.The general driving power source is composed of the capacitor,the resistance and the load.The discharge current reaches the maximum when the discharge current reaches the maximum,so as to generate the current pulse.For the disadvantages of output power shortage,unable to work continuously,the scope of application and other deficiencies restricted the application of giant magnetostrictive transducer.Therefore,in order to make full use of the performance of the superconducting transducer,it is necessary to develop a super-magnetic transducer drive system with large output power,versatility,continuous operation and digital control.In this paper,a rare earth giant magnetostrictive transducer drive system and a host computer application program for developing a drive system are developed according to the actual demand.The influence of the drive system on the output characteristics of the superconducting transducer is studied.The main research contents and results of this paper are as follows,(1)The rare-earth giant magnetostrictive transducer drive system hardware circuit was developed.The working state and parameters of the giant magnetostrictive transducer in different environments are designed and based on that,the overall scheme of the system was determined.In this design,the hardware drive system includes three main parts,signal generator,DC power supply and the power amplifier module.Based on the direct digital frequency synthesis technology,the signal generator was designed to realize the high accuracy,digital,high universality of the drive system output signal.In the design of DC voltage regulator circuit,the parameters of main components were obtained according to the working principle of the circuit.(2)The application software of the giant magnetostrictive transducer drive system was developed.With the help of Lab VIEW software development platform,using the modular design principle,the application software of signal generator development was developed mainly for the choice of the initial control signal types and properties of the signal parameters settings.The application software send control signal through the PC sound card to realize the control of hardware circuit.The development of application software can implement the goal of the human-computer interaction,increase system functions,and easy to operate.(3)The integration and performance test of rare-earth giant magnetostrictive transducer drive system.Firstly,each module hardware circuit was assembled and a complete instrument was formed.Then,the hardware circuit was tested separately to verify the accuracy and stability of the system output signal.At last,the PC application software,hardware circuit and super magnetic transducer were gathered to study the influence of the drive system of the transducer output characteristic and test the reliability and practicability of the whole system.Through the analysis of working condition of the transducer,the system was used to drive different types of magnetic transducer and verify the versatility of the drive system.The driving system designed in this paper adopts the digital control to make the super magnetic drive system of intelligent transducer more intelligent,which has certain reference value for the intelligent research of the super-magnet transducer drive system and provides the guarantee for application of rare-earth giant magnetostrictive transducer in more fields.