本文選題：質(zhì)子磁力儀 + 靈敏度��； 參考：《吉林大學(xué)》2017年碩士論文

【摘要】：質(zhì)子磁力儀是一種基于拉莫爾進(jìn)動(dòng)效應(yīng)研制的磁場(chǎng)測(cè)量?jī)x器,質(zhì)子進(jìn)動(dòng)磁力儀廣泛應(yīng)用于地質(zhì)環(huán)境勘測(cè),地下埋地物體探測(cè)和異常磁場(chǎng)檢測(cè)等領(lǐng)域。首先將儀器的傳感器放入外部磁場(chǎng),直流電流通過(guò)傳感器線圈,產(chǎn)生激勵(lì)磁場(chǎng)使氫質(zhì)子磁矩沿著線圈軸方向極化,然后撤去激勵(lì)磁場(chǎng),氫原子核的合磁矩繞待測(cè)磁場(chǎng)為軸心進(jìn)行拉莫爾旋進(jìn)運(yùn)動(dòng)。通過(guò)獲取感應(yīng)電壓信號(hào)的頻率乘以固定常數(shù)即可得到的待測(cè)量的地磁場(chǎng)值。本文所述的質(zhì)子磁力儀是基于ARM+CPLD架構(gòu)實(shí)現(xiàn)的。分別從鍵盤顯示模塊硬件電路、數(shù)字模塊硬件電路、數(shù)字模塊軟件程序設(shè)計(jì)三個(gè)方面對(duì)JPM-3型質(zhì)子磁力儀深入研究和創(chuàng)新。儀器的鍵盤顯示模塊選用19264點(diǎn)陣的液晶屏與上一代樣機(jī)相比改進(jìn)了按鍵功能和布局。數(shù)字板模塊硬件電路采用STM32F407ZGT6型號(hào)的ARM作為主處理器,采用EPM1270T144I5N型號(hào)CPLD邏輯器件,本文詳細(xì)設(shè)計(jì)JPM-3型質(zhì)子磁力儀系統(tǒng)的數(shù)字板硬件電路,由數(shù)字板供電模塊、STM32F407ZGT6最小系統(tǒng)、FSMC并行總線接口、數(shù)據(jù)存儲(chǔ)器、數(shù)據(jù)傳輸模塊、AD采集模塊組成。軟件方面包括各外設(shè)芯片驅(qū)動(dòng)和功能函數(shù)的編寫。實(shí)現(xiàn)了主控芯片對(duì)各功能模塊的控制、數(shù)據(jù)傳輸?shù)裙δ?有效的配合儀器完成各個(gè)功能。最后,通過(guò)各個(gè)模塊實(shí)際電路焊接和調(diào)試集成了JPM-3型質(zhì)子磁力儀樣機(jī)。該樣機(jī)具有自動(dòng)配諧、將CPLD芯片采集的拉莫爾信號(hào)頻率換算成磁場(chǎng)值、控制外部FLASH存儲(chǔ)磁場(chǎng)值數(shù)據(jù)、通過(guò)數(shù)據(jù)傳輸模塊將磁場(chǎng)值數(shù)據(jù)傳輸?shù)缴衔粰C(jī)。通過(guò)實(shí)際環(huán)境的測(cè)量結(jié)果表明,該樣機(jī)可靠性高,能夠準(zhǔn)確獲得待測(cè)磁場(chǎng)的參數(shù)。同一時(shí)間段兩臺(tái)相同的樣機(jī)放置在相同的野外環(huán)境進(jìn)行磁場(chǎng)值數(shù)據(jù)測(cè)試實(shí)驗(yàn),兩臺(tái)相同的JPM-3型質(zhì)子磁力儀測(cè)量磁場(chǎng)值數(shù)據(jù)相減來(lái)濾除環(huán)境噪聲。計(jì)算得到JPM-3型質(zhì)子磁力儀靈敏度為0.34n T。性能接近商業(yè)磁力儀的水平。
[Abstract]:Proton magnetometer is a kind of magnetic field measuring instrument based on Lemore precession effect. Proton precession magnetometer is widely used in geological environment survey underground buried object detection and abnormal magnetic field detection and so on. First, the sensor of the instrument is placed in the external magnetic field, and the DC current passes through the sensor coil, which generates an exciting magnetic field to polarization the hydrogen proton magnetic moment along the axis of the coil, and then removes the exciting magnetic field. The combined magnetic moment of the hydrogen nucleus moves around the axis of the magnetic field to be measured. The geomagnetic field value to be measured can be obtained by multiplying the frequency of the inductive voltage signal by a fixed constant. The proton magnetometer described in this paper is based on ARM CPLD architecture. The JPM-3 proton magnetometer is researched and innovated from three aspects: keyboard display module hardware circuit, digital module hardware circuit and digital module software design. The keyboard and display module of the instrument adopts the LCD screen with 19264 dot matrix to improve the function and layout of the keystroke compared with the previous prototype. The hardware circuit of digital board module adopts STM32F407ZGT6 ARM as main processor and EPM1270T144I5N model CPLD logic device. In this paper, the digital board hardware circuit of JPM-3 type proton magnetometer system is designed in detail. It is composed of STM32F407ZGT6 minimum system FSMC parallel bus interface, data memory, data transmission module and AD acquisition module. The software includes the peripheral chip driver and function function. The main control chip can control the function modules and transmit the data effectively with the instrument. Finally, the prototype of the JPM-3 type proton magnetometer is integrated through the actual circuit welding and debugging of each module. The prototype has automatic harmonic matching, converts the frequency of Lamer signal collected by CPLD chip into magnetic field value, controls the external FLASH to store magnetic field value data, and transmits the magnetic field value data to the upper computer through the data transmission module. The experimental results show that the prototype is reliable and can accurately obtain the parameters of the magnetic field to be measured. At the same time, two identical prototypes are placed in the same field environment to test the magnetic field data, and two identical JPM-3 type proton magnetometers subtract the magnetic field data to filter the ambient noise. The sensitivity of JPM-3 type proton magnetometer is 0.34n T. Performance is close to the level of a commercial magnetometer.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM936

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