提出一种基于凌阳单片机的步进电机加减速的控制方法。采用凌阳科技推出的16位结构工控单片机SPMC75F2413A为控制器，由Allegro公司生产的两相步进电机专用驱动器件SLA7042M构成步进电机的驱动电路，在传统的3段直线加减速控制算法基础上增加至7段S形曲线加减速过程，控制步进电机的启动和停止。实验结果表明，该控制方法克服了直线加减速中不连续、易造成系统冲击的问题，整个系统实现柔性控制，电机启动、停止连续性能提高30%。 Abstract: The method of controlled stepping motor is referred based on SPMC75F2413A MCU， which adopts the 16 knots SPMC75F2413A MCU as the controller. The special-purpose actuation chip SLA7042M of two stepping motor produced by Allegro Corporation constituted to actuation electric circuit. The purpose of increasing to seven section of S shape curve based on the traditional three sections of straight line is to control the start and stop process of stepping motor. The experimental results show that the control method solves easy to pull-out and overshot problems. The overall system realizes flexible control， and the performance of motor start or stop continuity is increased 30%
上传时间： 2013-12-08
上传用户：jiangfire
实时时钟是微机保护装置的重要部件，在讨论PCF8583结构与功能的基础上，提出采用dsPIC33F系列微处理器与串行I2C时钟PCF8583的接口设计方案，给出了相应的接口电路与软件流程。该设计方案结构简单，可靠性高，开发周期短，具有一定的实用与参考价值。所设计的微机保护装置已投入现场运行，效果良好。 Abstract: Real-time clock chip is an important part in microcomputer protection device.Based on discussing the structure and function of PCF8583，a new interface scheme which uses dsPIC33F microprocessor and serial clock chip（I2C）PCF8583is proposed.The method of the circuit design and the main software flow are introduced in this paper.The scheme has simple structure，higher reliability and shorter exploitation cycle，so has definite practicality or reference value.The microcomputer protection device has been put into operation with better effects.
上传时间： 2013-11-18
上传用户：Thuan
设计一种基于AT89C52的语音录放系统，利用单片机、ISD2560语音录放器件、麦克风、扬声器等元器件实现硬件电路的设计，并利用C51高级语言设计ISD2560器件控制字的写入和定时中断程序。经软硬件调试，结果表明该系统录放效果良好，具有一定的工程实用价值。 Abstract: Voice recording and playback system based on AT89C52is designed in this paper.Using the single-chip microcomputer，voice recording and playback chip ISD2560，microphone and speaker to realize the hardware circuit design.Writing ISD2560control words and timing interrupt procedures are designed by C51advanced language.Through the hardware and software test,voice recording and playback system play better voice,and this system has some engineering practical values.
上传时间： 2013-10-20
上传用户：ywcftc277
MG3500SoC是支持H.264高清编解码器的片上系统，内部集成一个嵌入式ARM926处理器，支持高清H.264编解码、MPEG鄄2解码和JPEG编解码。介绍了MG3500SoC的主要性能特点、引脚排列、主要接口功能及在DVR上的应用，以及MG3500SoC及其周围器件的硬件设计，提出了在设计中应注意的问题。 Abstract: The MG3500System-on-Chip（SoC）is high definition（HD）H.264codec,including ARM926-EJ processor，H.264encoder/decoder，MPEG2decoder and JPEG/MJPEG encoder/decoder.The features,pin assignments，interfaces and the typical application of MG3500in DVR are introduced in this paper.The application hardware circuit between the MG3500SoC and peripheral device are given,the questions which the syetem design needs to pay attention are explained.
上传时间： 2013-11-12
上传用户：elinuxzj
介绍了以AVR单片机ATmega16为核心，采用前端信号调理电路、程控增益放大器以及波形显示LCD（GDM12864A）实现的一个简易示波器。并给出该系统设计的硬件和软件设计方案。 Abstract: Abstract:This paper introduces an easy digital storage oscilloscope based on the AVR microcontroller ATmega16,especially emphasizes on the software design and the hardware design which contains signal processing circuit,gain-programmed amplifier circuit and LCD’s interface circuit and so on.
上传时间： 2013-10-13
上传用户：ccccccc
介绍了当前普通标记机控制系统现状及其存在缺点，给出气动标记机及相频修正PWM模式的工作原理。采用ATmega16单片机和USB转换RS232接口器件CH341T实现驱动控制系统与PC的实时通讯，标记控制系统可升级到USB接口。采用基于ATmega16的相频修正PWM替换555振荡电路产生的PWM，可直接通过软件调整PWM信号。使用达林顿三极管TIP122替代直流继电器驱动高频电磁阀，使得电磁阀驱动电路简单，成本低廉。该控制系统已成功应用于气动标记机。 Abstract: In this paper,the actuality and demerit of the common gas marking machine control systems are described.The operation principle of the gas marking machine and the phase and frequency correct PWM of ATmega16is introduced.The real-time communication between the driving control system and PC by CH341T which its function is translated USB to RS232is realized,the control systems is updated grade to USB interface.The PWM signal can be adjustable by software for the555surge circuit was substituted by the phase and frequency.The high frequency electromagnetic value’s driving circuit by DC relay is replaced by TIP122,therefore,the circuit is become simple and the cost cheap.The control systems has been widely used in gas marking machine.
上传时间： 2013-10-18
上传用户：1427796291
介绍了一种基于C8051F020单片机的多路压力测量仪。该测量仪选用电阻应变式压力传感器采集压力信号，并经放大电路处理后送入C8051F020单片机，再由C8051F020单片机内部的A/D转换器将采集到的压力信号进行模数转化，然后分别对数据进行存储和显示。该测量仪能测量6路压力信号，并且各测量点都能单独检测和设置。由于采用了C8051F020单片机，简化了硬件电路，增强了抗干扰能力，使得测量仪具有测量精度高，冲击小等特点。 Abstract: A measurement apparatus for multi-channel pressure based on single chip microcomputer is introduced.It can measure 6 channels signal of the pressure，and the pressure measure points can be detection and located individually.The pressure signal sampling is obtained by resistor stress-type pressure sensors，the digital signals of 6 channels are collected through amplifying and adjustment circuit of pressure signals and internal integrated A/D converter of MCU.Finally，and it realizes the function to store and display data separately.C8051F020 was used to made hardware circuit simple，and it also enhanced the anti-interference ability.It features high precision and little impact.
上传时间： 2013-11-16
上传用户：yare
为满足矿井安全生产要求，介绍了一种以AT89C51单片机为主控器，对环境空气的温度、有毒易燃气体的浓度等进行检测的监控系统。该系统配合外围电路能实现对上述环境指标的控制并存储相关数据与上位PC机通信。它采用硬件抗干扰和软件抗干扰技术，以确保整个系统工作的准确性。 Abstract: In order to meet the needs of mine produce safety，a kind of intellignet mine ambient monotoring and control system based on AT89C51 is introduced.This system can detect the temperature of ambient of mine，the density of poisonous inflammable gas,combined external circuit.With its function part， this system can change above-mentioned elements.
上传时间： 2013-11-10
上传用户：wendy15
Mega16是一款采用先进RISC精简指令，内置A/D的8位单片机，可支持低电压联机 Flash和EEPROM 写入功能；同时还支持 Basic和C 等高级语言编程。用它设计电子时钟不仅成本低，硬件简单，而且很容易实现系统移植。介绍了如何利用AVR系列单片机Mega16及1602字符液晶来设计电子时钟的方法，同时给出了相应的电路原理及部分语言程序。 Abstract: ?Mega16 is a high-performance, low power consumption, the use of advanced RISC concise instructions, built-in A/D 8-bit microcontrollers, the on-line support for low-voltage Flash, EEPROM write function. Except Mega16 also support the Basic, C, and other high-level language programming.The electronic clock which is deisgned by Mega16 is not only low-cost, simple hardware, but easy to achieve system migration.The design method of electrioic clock based on the AVR Mega16 and character LCD1602 is introduced in this paper,and the corresponding circuit electrionic and some language program are given.
上传时间： 2014-12-27
上传用户：zl5712176
针对目前燃气灶市场的状况，提出一种基于PIC16C711单片机的燃气灶脉冲点火控制器设计,具体包括有系统的组成和功能介绍、硬件电路设计及软件功能实现。 Abstract: Aiming at today’s gas cooker market, a pulse ignition controler design based on PIC16C711 is presented.The specific descriptions of system components and functions,hardware circuit design and software function are given.
上传时间： 2013-10-31
上传用户：zhqzal1014
