【正文】 在即將劃上一個(gè)句號，而于我的人生來說卻僅僅只是一個(gè)逗號，我將面對新的征程的開始。本研究及論文是在我的導(dǎo)師張姣的親切關(guān)懷和耐心的指導(dǎo)下完成的。偉人、名人固然為我所崇拜，可是我更迫切地想要把我的敬意獻(xiàn)給給一位平凡的人，我的導(dǎo)師張姣老師。也許我不是您最出色的學(xué)生，但您卻是我所最尊敬的老師。您是如此的治學(xué)嚴(yán)謹(jǐn)，學(xué)識淵博，視野廣闊，思想深刻，您用心為我營造一種良好的學(xué)術(shù)氛圍，讓我的論文更加的嚴(yán)謹(jǐn)。 同時(shí)，我還要感謝一下一起完成畢業(yè)論文小組的同學(xué)們，如果沒有你們的支持和傾心的協(xié)助，我是無法解決這些困難和疑惑，最終能夠讓本文順利完成。 至此論文付梓之際，我的心情無法保持平靜，從開始選擇課題到論文的順利答辯，有無數(shù)可敬的師長、朋友給了我很多的幫助，在這里請您接受我誠摯的謝意! 最后，再次對那些在論文完成過程中，關(guān)心、幫助我的同學(xué)和朋友們表示衷心地感謝！重慶郵電大學(xué)移通學(xué)院本科畢業(yè)設(shè)計(jì)（論文） 27 參考文獻(xiàn)[1] 任俊龍． 基于 AVＲ 單片機(jī)的空氣凈化器控制系統(tǒng)的硬件設(shè)計(jì)與實(shí)現(xiàn)［D］． 合肥: 合肥工業(yè)大學(xué)，2022．[2] 馬嫚，程鉛，陳慧，等． 基于信息融合技術(shù)的空氣質(zhì)量檢測系統(tǒng)［J］．電子器件，2022，36( 4) : 554－558．[3]CYGNAL． MixedSignal 64 kbyte ISP FLASH MCU Datasheet[4]Ma X T， Wang H Y， Wang L． Indoor Air Quality Detect and ControlSystem Based on Gas Sensor Array［J］．Journal of Transducer Technology，2022，21（ 11) : 24－27．[5] 周愛國，陳羽，周全，等．空氣質(zhì)量流量傳感器的流場分析及安裝位置優(yōu)化［J］．儀表技術(shù)與傳感器，2022( 10) : 7－9．[6] 郜麗鵬，林云． 基于凸優(yōu)化理論的多傳感器故障診斷技術(shù)［J］．電子測量與儀器學(xué)報(bào)，2022，23 (8) : 39－43[7] 李楠，王曉東，王濤，等． 基于 C8051F064 單片機(jī)的高速數(shù)據(jù)采集與存儲(chǔ)系統(tǒng)［J］． 電子器件，2022，30( 2) : 628－632．[8] 張沁川，王厚軍． 動(dòng)態(tài)采集過程的系統(tǒng)模型和評價(jià)方法研究［J］．儀器儀表學(xué)報(bào)，2022，33( 1) : 42－48．[9] 宋鵬飛，王厚軍，曾浩．高速深存儲(chǔ)數(shù)據(jù)采集系統(tǒng)研究與設(shè)計(jì)［J］．儀器儀表學(xué)報(bào)，2022，32( 4) : 903－912．[10] 董玉德，黃開，金運(yùn)掌，等． 室內(nèi)柜式空氣凈化器嵌入式系統(tǒng)的設(shè)計(jì)［J］．電子測量技術(shù)，2022，36( 3) : 62－66．[11] ILI Technology Corp． ILI9320 Datasheet[R]．[12] 廉小龍，胡旭． 基于 LM3S1138 的觸摸屏系統(tǒng)設(shè)計(jì)［J］．機(jī)械工程與自動(dòng)化，2022( 4) : 17－19．[13] [D].南昌：南昌大學(xué)，2022.[14] [D].上海：上海交通大學(xué)，2022.[15] [D].西安：西安電子科技大學(xué)，2022.重慶郵電大學(xué)移通學(xué)院本科畢業(yè)設(shè)計(jì)（論文） 28 附 錄一、英文原文DC Switching Power Supply Protection TechnologyAbstract: The DC switching power supply protection system, protection system design principles and machine protection measures, an analysis of switching power supply in the range of protected characteristics and its design methodology, introduced a number of practical protection circuit.Keywords: switching power supply protection circuit system designA、IntroductionDC switching regulator used in the price of more expensive highpower switching devices, the control circuit is also more plex, In addition, the load switching regulators are generally used a large number of highly integrated electronic systems installed devices. Transistors and integrated device tolerance electricity, less heat shocks. Switching Regulators therefore should take into account the protection of voltage regulators and load their own safety. Many different types of circuit protection, polarity protection, introduced here, the program protection, overcurrent protection, overvoltage protection, undervoltage protection and overtemperature protection circuit. Usually chosen to be some bination of protection, constitutes a plete protection system.B、Polarity protectionDC switching regulator input is generally not regulated DC power supply. Operating errors or accidents as a result of the situation will take its wrong polarity。 switching power supply will be damaged. Polarity protection purposes, is to make the switching regulator only when the correct polarity is not connected to DC power supply regulator to work at. Connecting a single device can achieve power polarity protection. Since the diode D to flow through switching regulator input total current, this circuit applied in a lowpower switching regulator more suitable. Power in the larger occasion, while the polarity protection circuit as a procedure to protect a link, save the power required for polarity protection diodes, power consumption will be reduced. In order to easy to operate, make it easier to identify the correct polarity or not, collect the next light.C、Procedures to protect Switching power supply circuit is rather plicated, basically can be divided into lowpower and highpower part of the control part of the switch. Switch is a highpower transistors, for the protection of the transistor switch is turned on or off power safety, we must first modulator, amplifier and other lowpower control circuit. To this end, the boot to ensure the correct procedures. Switching Regulators generally take the input of a small inductor, the input filter capacitor. Moment in the boot, filter capacitor will flow a lot of surge current, the surge current can be several times more than the normal input current. Such a large surge current may contact the general power switch or relay contact melting, and the input fuse. In addition, the 重慶郵電大學(xué)移通學(xué)院本科畢業(yè)設(shè)計(jì)（論文） 29 capacitor surge current will damage to shorten the life span of premature damage. To this end, the boot should be access to a current limiting resistor, through the current limiting resistor to capacitor charging. In order not to make the current limiting resistor excessive power consumption, thus affecting the normal switching regulator, and the transient process in the boot after a short period then automatically relays it to DC power supply directly to the switching regulator power supply. This circuit switching regulator called a soft start circuit.Switching regulator control circuit of the logic ponents required or opamp auxiliary power supply. To this end, the auxiliary power supply must be in the switch circuit. This control circuit can be used to ensure the boot. Normal boot process is: to identify the polarity of input power, voltage protection procedures → boot → auxiliary power supply circuit and through current limiting resistor R of the switching regulator input capacitor C → charge modulation switching regulator circuit, → shortcircuit current limiting resistor stability switching regulator.In the switching regulator, the machines just because the output capacitance, and charge to the rated output voltage value of the need for a certain period of time. During this time, sampling the output amplifier with low input voltage sampling, closedloop regulation characteristics of the system will force the switching of the transistor conduction time lengthened, so that switching transistor during this period will tend to conti