This paper proposed the design of the car navigation terminal program, enabling...

07年计算机专业信息系统设计课程作业.帮助有需要的朋友下载-07 professional computer information systems course design work. Help the needy friends download!

关于一个小型超市信息系统数据库设计的Word文档，可以做为课程设计参考。-With regard to a small supermarket information system database design, Word documents, can be used as curriculum design.

文章中包含了多种驱动LED数码管的应用电路图，多数应用集成电路，十分实用。-The article contains a variety of driving the application of LED digital tube circuit, most applications integrated circuits, very useful.

流媒体 Scalable Video Coding 可分级视频编码 会议论文 清华大学课程指定阅读文献-An Overview of Scalable Video Streaming.pdf An Efficient Complexity-Scalable Video Transcoder with Mode Refinement.pdf Improved Interlayer Prediction for Scalable Video Coding.pdf ……

介绍了一种简洁可靠的嵌入式以太网接口设计-Introduce a simple and reliable embedded Ethernet Interface Design

SM5004,完全可以取代mcx314的一款FPAG芯片！-SM5004, is entirely possible to replace a MCX314 of FPAG chips!

一个关于小型超市系统设计，里面有好多用例示图，对课程设计很有帮助。-A small supermarket on the system design, which has shown a lot of use case diagram, useful for curriculum design.

大屏幕显示及触摸屏系统设计方案， 本系统软件首先界面精美，操作简便，触控点布局合理，方便触摸，提高触摸准确率。其次系统结构设计合理，充分利用图、文、声、像以及交互性等多媒体特征对用户的操作、信息查询与接收等进行合理导引，以便用户以最少的时间和精力查询到最多的信息-Large-screen display and touch-screen system design, software, first of all, the system interface is beautifully simple, touch points, rational layout, easy to touch and improve touch accuracy. Secondly, the structural design of a reasonable system, make full use of maps, text, sound, such as interactive multimedia, as well as characteristics of the user" s operation, and receiving information such as a reasonable guide, so users with minimal time and effort to maximize the amount of information inquiries

摘要】 本文介绍了以AT89S51单片机为核心的温度控制器的设计,在该设计中采用高精度的温度传感器AD590对电热锅炉的温度进行实时精确测量,用超低温漂移高精度运算放大器OP07将温度-电压信号进行放大,再送入12位的AD574A进行AD转换,从而实现自动检测,实时显示及越限报警。控制部分采用PID算法,实时更新PWM控制输出参数,控制可控硅的通断时间,最终实现对炉温的高精度控制。 【关键词】 水温控制系统 PID控制单片机 温度控制是工业生产过程中经常遇到的过程控制,有些工艺过程对其温度的控制效果直接影响着产品的质量,因而设计一种较为理想的温度控制系统是非常有价值的。 一 系统设计方案的论证与比较 根据题目要求,电热锅炉温度控制系统由核心处理模块、温度采集模块、键盘显示模块、及控制执行模块等组成。-Abstract This paper introduces the single-chip AT89S51 temperature controller at the core of the design, in the design of high-precision temperature sensor AD590 temperature of the heating boiler accurate measurement of real-time, using ultra-low temperature drift, high-precision operational amplifier OP07 temperature Part of the use of PID control algorithms, real-time PWM control output parameter update and control the on-off Thyristor time, finally achieve the high-precision control of temperature. 【Key Words】 temperature control system PID control of single-chip Temperature control is the process of ind

数字频率计的设计可以分为测量计数和显示。其测量的基本原理是计算一定时间内待测信号的脉冲个数，这就要求由分频器产生标准闸门时间信号，计数器记录脉冲个数，由控制器对闸门信号进行选择，并对计数器使能断进行同步控制。控制器根据闸门信号确定最佳量程。-The design of digital frequency meter can be divided into measurement and display count. The basic principle of its measurement is calculated under test signal within a certain period of time the number of pulses, which have a standard requirement by the divider gate time signal pulse counter records the number of signals from the controller to choose the gates and counters to make off synchronous control can be carried out.Controller based on the gate signal to determine the optimum range.