【摘要】：稀土超磁致伸縮換能器是一種可控的能量轉(zhuǎn)換器件,它具有轉(zhuǎn)換效率高、頻率響應(yīng)范圍寬、輸出振幅大、性能穩(wěn)定等特點(diǎn),在工程檢測、醫(yī)療器械、工業(yè)加工和軍用聲吶等領(lǐng)域有著廣泛的應(yīng)用。稀土超磁致伸縮換能器需要與驅(qū)動(dòng)電源配合使用,一般的驅(qū)動(dòng)電源由電容、電阻和負(fù)載組成二階放電回路,在放電電流達(dá)到最大時(shí)關(guān)斷開關(guān)管,從而產(chǎn)生電流脈沖,其具有輸出功率較小、非連續(xù)工作、適用范圍差等不足,制約了超磁致伸縮換能器的應(yīng)用。為了充分利用超磁換能器的性能,研制一種輸出功率大、通用性強(qiáng)、連續(xù)工作、數(shù)字化控制的超磁換能器驅(qū)動(dòng)系統(tǒng)十分必要。本文根據(jù)實(shí)際需求研制一種稀土超磁致伸縮換能器驅(qū)動(dòng)系統(tǒng)以及開發(fā)驅(qū)動(dòng)系統(tǒng)的上位機(jī)應(yīng)用程序,并對驅(qū)動(dòng)系統(tǒng)進(jìn)行組裝調(diào)試,研究其對超磁換能器輸出特性的影響,本文的主要研究內(nèi)容與結(jié)果如下:(1)稀土超磁致伸縮換能器驅(qū)動(dòng)系統(tǒng)的硬件電路的研制。首先對超磁致伸縮換能器在不同環(huán)境中的工作狀態(tài)和參數(shù)進(jìn)行設(shè)計(jì),并以此為依據(jù)確定系統(tǒng)的總體方案,驅(qū)動(dòng)系統(tǒng)的硬件包括三個(gè)主要部分:信號發(fā)生器、直流穩(wěn)壓電源和功率放大模塊。然后基于直接數(shù)字頻率合成技術(shù)對信號發(fā)生器進(jìn)行設(shè)計(jì),實(shí)現(xiàn)驅(qū)動(dòng)系統(tǒng)輸出信號精度高、數(shù)字化、通用性強(qiáng);在直流穩(wěn)壓電路的設(shè)計(jì)中,依據(jù)電路的工作原理進(jìn)行計(jì)算,得出主要元器件的參數(shù)。(2)稀土超磁致伸縮換能器驅(qū)動(dòng)系統(tǒng)的上位機(jī)應(yīng)用軟件的開發(fā)。借助Lab VIEW軟件開發(fā)平臺(tái),采用模塊化的設(shè)計(jì)原則,開發(fā)了信號發(fā)生器應(yīng)用軟件,主要實(shí)現(xiàn)功能為對初始控制信號類型的選擇以及信號參數(shù)屬性的設(shè)置;應(yīng)用軟件通過上位機(jī)的聲卡發(fā)出控制信號,實(shí)現(xiàn)對硬件電路的控制;應(yīng)用程序的開發(fā),實(shí)現(xiàn)系統(tǒng)的人機(jī)交互,增加系統(tǒng)功能,操作方便。(3)稀土超磁致伸縮換能器驅(qū)動(dòng)系統(tǒng)的集成與性能測試。將各模塊硬件電路進(jìn)行集成,形成完整的儀器;組裝完成后對硬件電路進(jìn)行單獨(dú)測試,驗(yàn)證系統(tǒng)輸出信號的精確度與穩(wěn)定度;對上位機(jī)應(yīng)用軟件、硬件電路和超磁換能器進(jìn)行級聯(lián),研究驅(qū)動(dòng)系統(tǒng)輸對換能器輸出特性的影響,測試整個(gè)系統(tǒng)的可靠性和實(shí)用性。使用該系統(tǒng)對不同型號的超磁換能器進(jìn)行驅(qū)動(dòng),通過對換能器工作狀況的分析,驗(yàn)證驅(qū)動(dòng)系統(tǒng)的通用性。本論文所設(shè)計(jì)的驅(qū)動(dòng)系統(tǒng)采用數(shù)字化操控,對超磁換能器驅(qū)動(dòng)系統(tǒng)的智能化進(jìn)行嘗試,對超磁致伸縮換能器的智能化有一定的幫助,數(shù)字電源在稀土超磁致伸縮換能器的驅(qū)動(dòng)控制中有著良好的應(yīng)用前景。
[Abstract]:Rare earth giant magnetostrictive transducer is a controllable energy conversion device. It has the characteristics of high conversion efficiency, wide frequency response range, large output amplitude and stable performance. Industrial processing and military sonar are widely used. The rare earth giant magnetostrictive transducer needs to be used in conjunction with the driving power supply. Generally, the drive power supply consists of capacitors, resistors and loads to make up the second-order discharge circuit. When the discharge current reaches the maximum, the switch tube is turned off and the current pulse is generated. The application of Giant Magnetostrictive Transducer is restricted because of its low output power, discontinuous operation and poor range of application. In order to make full use of the performance of the giant magnetic transducer, it is necessary to develop a driving system of the giant magnetic transducer with large output power, strong generality, continuous operation and digital control. In this paper, a kind of drive system of rare earth giant magnetostrictive transducer and the upper computer application program of driving system are developed according to the actual demand, and the driving system is assembled and debugged, and its influence on the output characteristics of the giant magnetic transducer is studied. The main research contents and results are as follows: (1) the hardware circuit of the drive system of rare earth giant magnetostrictive transducer. Firstly, the working state and parameters of the giant magnetostrictive transducer in different environments are designed, and based on this, the overall scheme of the system is determined. The hardware of the driving system consists of three main parts: signal generator. DC power supply and power amplifier module. Then the signal generator is designed based on the direct digital frequency synthesis technology to realize the high precision, digitization and versatility of the output signal of the drive system. In the design of the DC voltage stabilizing circuit, the calculation is carried out according to the working principle of the circuit. The parameters of the main components are obtained. (2) the development of the upper computer application software for the drive system of the rare earth giant magnetostrictive transducer. With the help of LabVIEW software development platform and modularization design principle, the application software of signal generator is developed. The main function is the choice of initial control signal type and the setting of signal parameter attribute. The application software sends out the control signal through the sound card of the upper computer, realizes the control of the hardware circuit, develops the application program, realizes the man-machine interaction of the system, and increases the function of the system. Easy to operate. (3) Integration and performance test of rare earth giant magnetostrictive transducer drive system. The hardware circuit of each module is integrated to form a complete instrument, and the hardware circuit is tested separately after assembly to verify the accuracy and stability of the output signal of the system. The hardware circuit and the giant magnetic transducer are cascaded to study the effect of the drive system transmission on the output characteristics of the transducer and to test the reliability and practicability of the whole system. The system is used to drive different types of giant magnetic transducers, and the generality of the drive system is verified by analyzing the working conditions of the transducers. The drive system designed in this paper uses digital control to try to intelligentize the driving system of giant magnetic transducer, which is helpful to the intelligence of giant magnetostrictive transducer. Digital power supply has a good application prospect in the drive control of rare earth giant magnetostrictive transducer.
【學(xué)位授予單位】：湘潭大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TB552

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本文編號：2125224