针对材料试验机等设备中要求测量或控制材料拉伸或压缩的位移，一般采用光电轴角编码器检测位置信号，输出正交编码脉冲信号。若采用其他方法检测位置信号，必然导致电路设计复杂，可靠性降低。因此，提出一种基于LS7266R1的电子式万能材料试验机设计方案。给出了试验机中的控制器工作原理，LS7266R1与单片机的接口硬件设计，以及主程序软件流程图。巧妙地把力量传感器，位移传感器等机械运动状态的压力或拉力以及位置坐标，变成了电压信号和电脉冲数字信号，供A/D测量和LS7266R1计数，从而实现了独立完成材料试验控制或通过PC机串口命令完成材料试验控制。 Abstract: Aiming at the requirement that the displacement of the tension and compression always be tested and controlled in the equipement such as material testing machine. The position signal was tested by photoelectric axial angle coder. TherefOre， the paper proposes the design of electronic universal testing machine design based on LS7266R1. If the position signal detected by other methods， will inevitably lead to the circuit design complexity， reliability decreased. The wOrk theOry of the controller， the hardware interface design between LS7266R1 and single chip， and the flow chart of main program， are presented in this paper. The signal of the compression Or tension power and displacement at wOrking， which tested by power sensOr and displacement sensOr especially， is changed into electric voltage and electric pulse numerical signals. And these signals can be tested by A/D and counted by LS7266R1. Finally the test of the material properties can be controlled by itself， Or controlled by the COM command of PC.
上传时间： 2013-11-02
上传用户：yl1140vista
介绍了电力操作电源与智能电池巡检系统的特点，给出了一种基于超低功耗单片机MSP430 F149针对中小型变电站自动化运行的专用设备的基本设计原理及实现方法，最后给出了详细硬件构成和软件实现。该系统能满足中小型变电站安全、可靠、自动运行的要求，并通过与上位机的串行通信实现变电站的远程管理和控制。 Abstract: The characters of the intelligent battery data logging system of the electric operation power are introduced.The basic design principle and the implemented methods of the special equipment which only designed fOr the middle Or small transfOrmer substation based on MSP430F149 are prescribed. Finally, the hardware block diagram and the software flow chart are also given. The function that the system finally needs to realize can basically meet with the middle Or small transfOrmer substation’s satisfy, reliably,and automatic running.And it can also realize the transfOrmer substation long-distance management and control by serial communicating with the host computer.
上传时间： 2013-11-25
上传用户：黄华强
为降低成本和解决现有膜片钳放大器系统中PC机的干扰问题，研究了一种基于单片机的膜片钳放大器小系统。该系统采用ADI公司生产的ADuC841作为控制核心，并且配置相应的液晶显示模块LCM3202401。模拟电路部分采用高输入阻抗的AD8627实现微电流信号的采集，并由后级电路进行信号的放大和电阻电容的补偿。它具有硬件电路简单、体积小、使用方便的特点。既可以单独作为小系统实现采集和显示，也可以通过红外方式和PC机进行通讯，在PC机上进行信号的处理。 Abstract: In Order to reduce cost and resolve the interferential problem with PC in existing patch clamp amplifiers, a small patch clamp amplifier system design based on microcontroller is studied. It adopts a new high perfOrmance microconverter ADuC841 by the ADI as the control cOre in the system, configuring a liquid crystal module LCM3202401. In the analog circuit, AD8627 with high input impedance is used to detect the low current，signal magnification, as well as resistance and capacitance compensation are accomplished by subsequent circuits. It has the advantage of simple hardware circuit design, small volume and convenient operation. It can either be used as an independent system to measure and show signal detected Or transmit to PC by infrared ray.
上传时间： 2013-11-06
上传用户：yy_cn
The PCF8578 is a low power CMOS1 LCD row and column driver, designed to drive dotmatrix graphic displays at multiplex rates of 1:8, 1:16, 1:24 Or 1:32. The device has40 outputs, of which 24 are programmable and configurable fOr the following ratios ofrows/columns: 32¤8, 24¤16, 16¤24 Or 8¤32. The PCF8578 can function as a stand-alone LCDcontroller and driver fOr use in small systems. FOr larger systems it can be used inconjunction with up to 32 PCF8579s fOr which it has been optimized. Together these twodevices fOrm a general purpose LCD dot matrix driver chip set, capable of driving displaysof up to 40960 dots. The PCF8578 is compatible with most microcontrollers andcommunicates via a two-line bidirectional bus (I2C-bus). Communication overhead isminimized by a display RAM with auto-incremented addressing and display bankswitching.
上传时间： 2013-10-23
上传用户：顶得柱
将现行的供暖计费方式由按建筑面积计费变为按消耗的热能计费是供暖计费方式发展趋势，为了满足这一计费方式变化的需要，设计了基于IC卡的预付费式新型供暖计费系统，通过测量用户采暖系统进出口的温度和流量，计算用户消耗的热能，利用IC卡记录用户预付费的金额和当年热能的单价，根据热能消耗和当年热能的单价计算用户采暖费，根据实际发生的供暖费用和预付费金额控制供暖的开停，这一计费方式的变化使供暖计费更趋合理。 Abstract: It is trend that the mode of heat charging is changed from billing by building area to by thermal energy. In Order to meet the needs of heat charging mode changing， a new system of heat charging based on IC card is proposed. The user?蒺s energy consumption is calculated by measuring the user inlet and outlet temperature and flow，using the IC card to recOrd the prepaid amount and the current price of heat. The user?蒺s heating costs is calculated accOrding to energy consumption and current price， accOrding to actual heating costs and prepaid amount，the system controls the heating opening Or stopping. It is mOre reasonable that calculated heating costs by user heat consumption
上传时间： 2013-10-14
上传用户：大融融rr
1 FEATURES· Single chip LCD controller/driver· 1 Or 2-line display of up to 24 characters per line, Or2 Or 4 lines of up to 12 characters per line· 5 ′ 7 character fOrmat plus cursOr; 5 ′ 8 fOr kana(Japanese syllabary) and user defined symbols· On-chip:– generation of LCD supply voltage (external supplyalso possible)– generation of intermediate LCD bias voltages– oscillatOr requires no external components (externalclock also possible)· Display data RAM: 80 characters· Character generatOr ROM: 240 characters· Character generatOr RAM: 16 characters· 4 Or 8-bit parallel bus Or 2-wire I2C-bus interface· CMOS/TTL compatible· 32 row, 60 column outputs· MUX rates 1 : 32 and 1 : 16· Uses common 11 code instruction set· Logic supply voltage range, VDD - VSS: 2.5 to 6 V· Display supply voltage range, VDD - VLCD: 3.5 to 9 V· Low power consumption· I2C-bus address: 011101 SA0.
上传时间： 2013-11-08
上传用户：laozhanshi111
The CAT93C46 is a 1 kb Serial EEPROM memOry device which isconfigured as either 64 registers of 16 bits (OrG pin at VCC) Or 128registers of 8 bits (OrG pin at GND). Each register can be written (Orread) serially by using the DI (Or DO) pin. The CAT93C46 features aself−timed internal write with auto−clear. On−chip Power−On Resetcircuit protects the internal logic against powering up in the wrongstate.
上传时间： 2013-11-20
上传用户：ynzfm
介绍了一种基于MSP430系列单片机和ADXL203加速度传感器的数字式倾角仪，它不仅可以实现水平度检测，而且可以测量00～3600范围内的任意倾角，分辨率可达O．1。。此外，由于该倾角仪输出为数字结果，因此它也可以与其他的数字设备结合起来，组合成一个功能更加强大的仪器。该数字倾角仪可广泛应用于建筑、机械、道路、桥梁、石油、煤矿和地质勘探等各种需要测量重力参考系下倾角的场合。关键词：MSP430F133单片机；力敏传感器；ADXL203加速度计；角度测量 Abstract：This paper presents a new style digital inclinometer which is developed on the basis of the MSP430F133 MCU and the ADXL203 dual axis aeeelerometer．This inclinometer not only can test levelness，but also can measure any angle between 0。and 360。with an accuracy of 0．1 O．In addition，its output is a digital result，which makes it possible to integrate itself with other digital devices to fOrm a mOre functional unit．This inclinometer can be widely used in any construction site，oil field，coal-mine Or geologic survey and SO on where it will provide the wOrking people with convenience to measure any angles．Key wOrds：MSP430F133 MCU；fOrce sensOr；ADXL203 accelerometer；angle measurement
上传时间： 2013-11-14
上传用户：lizhizheng88
InfOrmation in this document is subject to change without notice and does notrepresent a commitment on the part of the manufacturer. The software describedin this document is furnished under license agreement Or nondisclosureagreement and may be used Or copied only in accOrdance with the terms of theagreement. It is against the law to copy the software on any medium except asspecifically allowed in the license Or nondisclosure agreement. The purchasermay make one copy of the software fOr backup purposes. No part of this manualmay be reproduced Or transmitted in any fOrm Or by any means, electronic Ormechanical, including photocopying, recOrding, Or infOrmation stOrage andretrieval systems, fOr any purpose other than fOr the purchaser’s personal use,without written permission.
上传时间： 2014-12-27
上传用户：Tracey
清单1 LSDAA: ADC R16,R16 ;十进制数（在R16中）左移调整子程序 ADDAA: IN R6,SREG ;bcd码相加调整子程序，先保存相加后的 LDI R17,$66 ;状态the old status ADD R16,R17 ;再将和预加立即数$66 IN R17,SREG ;输入相加后新状态(the new status) Or R6,R17 ;新旧状态相或 SBRS R6,0 ;相或后进位置位则跳行 SUBI R16,$60 ;否则减去$60(十位bcd不满足调整条件) SBRS R6,5 ;半进位置位则跳行 SUBI R16,6 ;否则减去$06(个位bcd不满足调整条件) ROr R6 ;向高位BCD返还进位位! RET
上传时间： 2013-10-08
上传用户：zh_901
