【正文】 Method Transmitter 作者姓名： 趙閱群 專業(yè)：電力電子與電力傳動(dòng) 研究方向：功率源技術(shù)及 其 應(yīng)用 指導(dǎo)教師： 于生寶 培養(yǎng)單位：儀器科學(xué)與電氣工程學(xué)院 2022 年 6 月 II ————————————————————————— 串聯(lián)諧振式航空電磁法發(fā)射 機(jī)關(guān)鍵技術(shù)研究 ————————————————————————— Research on Key Technology ofSerialResonant Airborne Electromagic Method Transmitter 作者姓名：趙閱群 專業(yè)名稱：電力電子與電力傳動(dòng) 指導(dǎo)教師：于生寶 學(xué)位類別：工學(xué)碩士 答辯日期： 2022 年 6 月 1 日 III 摘 要 直升機(jī) 航空電磁法 （ Airborne Electromagic Method） 地球物理 勘察儀器 具有快速、靈活、高效的突出優(yōu)點(diǎn)，并且能在地形復(fù)雜環(huán)境 執(zhí)行 地質(zhì)勘察任務(wù)。國外已研制成功直升機(jī)航空瞬變電磁勘察系統(tǒng)，并取得了一系列研究成果，而我國在這一方向的研究還處于空白階段。 發(fā)射機(jī)由功率發(fā)射單元、主控單元、峰值電流采集記錄單元和過沖削弱單元構(gòu)成。主要做了以下幾個(gè)方面的工作： 針對課題要求的發(fā)射電流指標(biāo)參數(shù)，提出了 串聯(lián)諧振方式的 功率 發(fā)射電路方案， 分析了該方案的工作過程和原理，并應(yīng)用 Matlab仿真模塊 Simulink對 功率發(fā)射電路 進(jìn)行了 仿真實(shí)驗(yàn) ，取得了良好的效果。 主控單元采用 51單片機(jī)最小系統(tǒng)為核心， 配合 外圍 按鍵電路和液晶 顯示 電路 ，實(shí)現(xiàn)時(shí)序信號的產(chǎn)生 、調(diào)節(jié)和顯示 。 針對飛行過程中無法直接觀測發(fā)射機(jī)發(fā)射電流的變化情況，設(shè)計(jì)了 電流采集記錄 單元。控制部分硬件采用 51單片機(jī) 最小系統(tǒng) 為核心 ，外圍 有 時(shí)鐘芯片、 AD轉(zhuǎn)換芯片、 EEPROM存儲(chǔ)芯片、 液晶顯示模塊 ， 并應(yīng)用模塊化編程方法 完成對突變電流模擬信號 和時(shí)間點(diǎn) 的采集、 AD轉(zhuǎn)換、記錄、存儲(chǔ)和事后顯示的功能 。該單元主要利用單穩(wěn)態(tài)觸發(fā)芯片延時(shí)主控單元的控制信號，控制雙向可控硅在 發(fā)射 電流將要過零的時(shí)刻將 功率電阻并聯(lián)于發(fā)射線圈兩端達(dá)到削弱電流過沖的目的。 IV 敘述了 組裝發(fā)射機(jī)的過程以及期間應(yīng)該注意的問題，而后 進(jìn)行了室內(nèi)實(shí)驗(yàn) 。 測量 過沖 削弱 單元功率 電阻兩端的電壓波形 ， 經(jīng)過 分析 得到 過沖削弱單元對發(fā)射電流過沖的削弱能力達(dá)到了 %。s research in this direction is still in the blank. Helicopter airborne electromagic method system consists of transmitter and the receiver system. In this paper, the key technologies ofhalf sine emission current of the series resonant AEM transmitter is researched, it includes power transmission unit, main control unit, peak current collection records unit, and overshoot weaken unit. Finally it got the indicator of 25Hz sine halfwave, peak current up to 2725A and pulse wide from the analysis of testing transmitter coil current waveform. Mainly the following aspects: For the index parameters of the subject requirements of the emission current, puts forward the plan of seriesresonant power transmitting circuit, analyzes the process and principle of this plan. The power transmitting circuit is simulated by using the Matlab simulation module Simlink, and achieves good result. Y45KPE models of highpower thyristors is selected as the power switching device through the working conditions of the power devices. The parameters of the transmit coil selection, diameter, number of turns are designed by calculating inductance value, and pletes the whole transmit coil. 51 SCM is used as the core of the main control unit and matching with a key circuit and liquid crystal circuitgenerates a timing signal, implementation, regulation and big power thyristor drive is builtby using discrete ponents, its main achievement is the amplification of timing signal current and throughthe pulse transformer isolates connection between weak electric and power electrical, finally gives the control drive unit real PCB board and output drive signal waveform. The peak current collecting and recording unit is designed for the flight cannot directly observed transmitter emission peak current changes. The unit’s analog signal VI from the current transformer output first passes through the peak detector circuit and is converted to DC level unit uses 51 SCM as the core, with clock chip AD conversion chip, EEPROM memory chip, liquid crystal display module, pleting the mutant current signal and the time point of acquisition, AD conversion, records andstorage, and after display function. Current overshoot diminished unit is designed for the emission current overshoot adverse effect on the receiving system. The unit mainly use the chip of monostable trigger delays the main control unit timing signal to control the bidirectional thyristor in the emission current will be zero moment of power resistors in parallel at both ends of the transmitter coil to weaken the current then the weak current system the case panel is designed, weak systems integration is packed, and gives the panel design and cabi photo. Narrative the transmitter’s assembly process and some problems which should be pay attention to during the process. And then uses the oscilloscope to observe transformer output waveform to obtain the emission current size, waveform and pulse width and other parameters, and achieves the requirements of the subject index 25Hz half sine wave, pulse , peak current of2725A. The measurement of weakening the overshoot of the voltage across the resistor waveform test, and the overshoot diminished circuit of current overshoot diminished ability were calculated, the results show that the weakening % of current overshoot. Keywords : Airborne electromagic method, series resonance, transmitter, power electronics, microcontrollerI 目 錄 第 1 章緒論 ............................................... 1 國內(nèi)航空瞬變電磁法儀器發(fā)展?fàn)顩r ................. 2 國外直升機(jī)航空瞬變電磁法儀器發(fā)展?fàn)顩r ........... 2 現(xiàn)代直升機(jī)航空瞬變電磁勘察系統(tǒng)主要特點(diǎn) ......... 3 研究的目的和意義 ............................... 4 主要研究內(nèi)容及其關(guān)鍵技術(shù) ....................... 5 論文的結(jié)構(gòu)與安排 ............................... 6 第 2 章功率發(fā)射電路關(guān)鍵技術(shù)研究 ........................... 8 全橋 SPWM逆變方案 .............................. 8 串聯(lián)諧振方案 .................................. 11 功率器件的選型 ................................ 16 諧振線圈的實(shí)現(xiàn) ................................ 18 概述 .............................................. 1 吊艙式直升機(jī)航空瞬變電磁探測原理簡 介 ............... 1 航空瞬變電磁法儀器的發(fā)展現(xiàn)狀及其特點(diǎn) ............... 2 論文的研究內(nèi)容、關(guān)鍵技術(shù)及結(jié)構(gòu)安排 ................. 4 概述 .............................................. 8 功率發(fā)射電路設(shè)計(jì) .................................. 8 功率發(fā)射電路電源設(shè) 計(jì) ............................. 15 功率器件的選型以及發(fā)射線圈的設(shè)計(jì) .................. 16 主控單元的設(shè)計(jì)與實(shí) 現(xiàn) ............................. 19 II 概述 .......................................... 19 方案選擇 ...................................... 20 硬件設(shè)計(jì) ...................................... 20 軟件設(shè)計(jì) ...................................... 21