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1、 摘摘 要要目前不少直流稳压电源仍然采用电位器和波段开关来调节电压，由电压表指示电压值的大小，所以调整精度不高，读数欠直观，电位器也易磨损。本设计研究一种以单片机为核心的智能化高精度简易直流电源的设计，该电源采用数字调节、输出精度高，同该电源具有电压预置、输出的电压信号和电流信号可同时显示功能。相比传统直流稳压电源的电路结构复杂、易受外界干扰、可靠性差、成本高，其适宜用于对电源精度要求较高的场合，具有低功耗、性能可靠、结构简单、使用方便和通用性好等特点。特别是针对常用数控直流电源因按键输入抖动带来的不良影响，电源采用遥控器发射。当红外信号采集电路采集到红外信号发射电路发出的信号时，就会发出一个
2、应答信号，单片机通过已设定的程序对该信号进行处理从而获取红外遥控的按键值。其次，单片机通过已设定的按键程序对接收到的按键值进行处理，对应地输出相应的数值给 DA 转换器，获得相应的模拟电压；然后再该电压进行放大和稳压，从而获得稳定的电压输出该系统原理是以单片机为控制单元，以数模转换芯片输出参考电压控制电压转换模块输出电压大小。文章介绍了系统的总体设计方案和软硬件的调试，其硬件电路主要由红外接收模块、显示模块、最小系统模块、遥控器、稳压控制模块、电源模块六部分构成。最后对数控直流电源的主要性能参数进行了测定和总结。【关键词关键词】 高精度 红外遥控 单片机 电压可调ABSTRACTA large
3、 number of DC power supply still uses the potentiometer and the band switch to adjust the voltage ,the voltmeter indicates the voltage value of the size of the adjustment accuracy is not high, due to intuitive readings, the potentiometer is also easy to wear. The design of a kind, intelligent precis
4、ion microcontroller as the core design of simple DC power supply, the power supply with digital regulator, the output of high precision, with the power supply has a voltage is preset, the output voltage and current signals at the same time display. Compared to the traditional DC power supply circuit
5、 complex, susceptible to external interference, poor reliability, high cost, its suitable for high precision on the power of the occasion, with the end of power consumption, reliable performance, simple structure, easy to use and Versatility is good. Especially for commonly used numerical key input
6、DC power supply due to the adverse effects of jitter, power supply using the remote control transmitter. When the infrared signal to the infrared signal acquisition circuit collecting a signal transmitting circuit,it will send a response signal, the microcontroller is set by the signal processing pr
7、ocedure to obtain the infrared remote control key value. Second, the SCM key process has been set by the received key is the value corresponding to the output values corresponding to the DA converter, to obtain the corresponding analog voltage;Then amplified and the voltage regulator, to obtain a st
8、able voltage output of the system control unit MCU is based on the principle, to digital-analog converter chip reference voltage output control voltage conversion module the size of the output voltage. This paper introduces the overall system design and debug hardware and software, the hardware circ
9、uit by the infrared receiver module, display module, the minimum system module, remote control, regulation control module, power module six parts. Finally, numerical control DC power supply key performance parameters were measured and summarized.【Keywords】Precision Infrared Remote Control SCM Adjust
10、able voltage目目 录录前 言.1第一章 数控电源的概述.2第一节 研究动态及意义 .2第二节 国内外研究现状 .3第三节 电源系统 .4 一、直流稳压电源 .4 二、电源硬件组成 .4第四节 本章小结 .4第二章 方案的设计与论证.6第一节 方案提出与确定 .6 一、根据设计的任务与要求 .6 二、特色及基本技术路线 .6 三、设计思想 .6 四、本文设计三个方案 .7 五、方案的确定 .8第二节 方案的设计 .8第三节 本章小结 .9第三章 系统电路原理及硬件实现.10第一节 系统结构 .10第二节 单元电路设计 .11 一、单片机控制模块 .11 二、红外发射器和接收电路 .13 三、三端可调稳压器 .15 四、稳压控制模块 .16 五、液晶显示屏（1602） .17 六、数模转换芯片（DAC0832） .18 七、运算放大器 OP07.20 八、电源电路 .22第三节 硬件电路整体框架 .22第四节 本章小结 .23第四章 系统的软件设计.24第一节 软件设计思路 .24第二节 系统软件流程 .
