針對(duì)目前采用的熱敏電阻測(cè)量方法，提出了采用單總線數(shù)字式溫度傳感器DS18B20和單片機(jī)組成的新型溫度測(cè)量?jī)x。介紹DS18B20的結(jié)構(gòu)和工作原理，以及單總線工作原理，給出了由Mega8單片機(jī)和DS18B20構(gòu)成的單總線溫度測(cè)量?jī)x的硬件電路及軟件流程圖。經(jīng)試驗(yàn)基于單總線器件DS18B20的溫度測(cè)量?jī)x，具有測(cè)量準(zhǔn)確、測(cè)溫范圍寬、體積小、控制方便等優(yōu)點(diǎn)。 Abstract: This paper brings forward a new temperature meter composed of 1-Wire temperature sensor DS18B20 and MCU which has advantage of the thermistor. In the article, the DS18B20＇s structure and controlling principles are introduced and hardware circuit and software diagram of the temperature meter are given.After been tested,the temperature meter has the advantages of accurate measurement, wide temperature range, small volume and convenient controlling.
上傳時(shí)間： 2013-10-31
上傳用戶：hzy5825468
針對(duì)材料試驗(yàn)機(jī)等設(shè)備中要求測(cè)量或控制材料拉伸或壓縮的位移，一般采用光電軸角編碼器檢測(cè)位置信號(hào)，輸出正交編碼脈沖信號(hào)。若采用其他方法檢測(cè)位置信號(hào)，必然導(dǎo)致電路設(shè)計(jì)復(fù)雜，可靠性降低。因此，提出一種基于LS7266R1的電子式萬(wàn)能材料試驗(yàn)機(jī)設(shè)計(jì)方案。給出了試驗(yàn)機(jī)中的控制器工作原理，LS7266R1與單片機(jī)的接口硬件設(shè)計(jì)，以及主程序軟件流程圖。巧妙地把力量傳感器，位移傳感器等機(jī)械運(yùn)動(dòng)狀態(tài)的壓力或拉力以及位置坐標(biāo)，變成了電壓信號(hào)和電脈沖數(shù)字信號(hào)，供A/D測(cè)量和LS7266R1計(jì)數(shù)，從而實(shí)現(xiàn)了獨(dú)立完成材料試驗(yàn)控制或通過(guò)PC機(jī)串口命令完成材料試驗(yàn)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.
上傳時(shí)間： 2013-11-02
上傳用戶：yl1140vista
介紹一種應(yīng)用于長(zhǎng)城賽弗SUV汽車后門車窗多功能控制器，能實(shí)現(xiàn)對(duì)電動(dòng)玻璃車窗、車窗雨刮器、噴水器以及電加熱除霜器等控制。介紹了基于NXP P89LPC922單片機(jī)多功能汽車后車窗控制器的控制功能、硬件電路原理和軟件設(shè)計(jì)方法。 Abstract: This paper presents a multipurpose automotive rear windows controller for CHANGCHENG SAFE SUV.The controller can control rear power-operated window,rear wiping,washing water pump and rear defroster of the windows. In this paper, it is introduced in detail that the functions and the design of the circuit and program of the controller based on NXP P89LPC922 MCU.
上傳時(shí)間： 2013-11-13
上傳用戶：z754970244
為降低成本和解決現(xiàn)有膜片鉗放大器系統(tǒng)中PC機(jī)的干擾問(wèn)題，研究了一種基于單片機(jī)的膜片鉗放大器小系統(tǒng)。該系統(tǒng)采用ADI公司生產(chǎn)的ADuC841作為控制核心，并且配置相應(yīng)的液晶顯示模塊LCM3202401。模擬電路部分采用高輸入阻抗的AD8627實(shí)現(xiàn)微電流信號(hào)的采集，并由后級(jí)電路進(jìn)行信號(hào)的放大和電阻電容的補(bǔ)償。它具有硬件電路簡(jiǎn)單、體積小、使用方便的特點(diǎn)。既可以單獨(dú)作為小系統(tǒng)實(shí)現(xiàn)采集和顯示，也可以通過(guò)紅外方式和PC機(jī)進(jìn)行通訊，在PC機(jī)上進(jìn)行信號(hào)的處理。 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.
上傳時(shí)間： 2013-11-06
上傳用戶：yy_cn
利用Atmel公司的ATmega168微處理器，采用A/D轉(zhuǎn)換方式來(lái)實(shí)現(xiàn)按摩椅控制器的鍵盤接口，通過(guò)在硬件電路中巧妙地選擇電阻，在軟件設(shè)計(jì)中采用數(shù)字濾波、二分法和區(qū)間鑒定等方法，靈敏可靠地實(shí)現(xiàn)了按摩椅中30個(gè)按鍵的處理。給出了硬件電路設(shè)計(jì)和軟件設(shè)計(jì)思想以及部分匯編代碼。 Abstract: This paper chooses A/D conversion method to realize the keyboard interface of the controller by using ATmega168 microchip from Atmel Company.It accomplishes 30-key dealing sensitively and reliably in massage chair through skillfully selecting resistors in hardware circuit and using digital filter,dichotomy and area-judging method in software design.The hardware design circuit, software design idea and partly assembles code are presented mainly.
上傳時(shí)間： 2014-01-10
上傳用戶：咔樂(lè)塢
介紹了CAN總線和P87C591單片機(jī)的特點(diǎn)，給出了基于P87C591單片機(jī)的信號(hào)采集節(jié)點(diǎn)的軟、硬件設(shè)計(jì)，指出了硬件電路設(shè)計(jì)中應(yīng)注意的問(wèn)題，在軟件設(shè)計(jì)中重點(diǎn)介紹了節(jié)點(diǎn)初始化、報(bào)文發(fā)送和報(bào)文接收等子程序。 Abstract: The features of CAN Bus and the microcontroller P87C591 are introduced, and the design of hardware circuit and soft configuration of the signals collection node based on P87C591 are presented. The problems in designing hardware circuit are discussed.Initialization subprogram, transmiting subprogram and receiving subprogram are emphasized in soft configuration.
標(biāo)簽： P87C591 信號(hào)采集 節(jié)點(diǎn)
上傳時(shí)間： 2013-11-03
上傳用戶：BIBI
基于幅移鍵控技術(shù)ASK（Amplitude-Shift Keying），以C8051F340單片機(jī)作為監(jiān)測(cè)終端控制器，C8051F330D單片機(jī)作為探測(cè)節(jié)點(diǎn)控制器，采用半雙工的通信方式，通過(guò)監(jiān)控終端和探測(cè)節(jié)點(diǎn)的無(wú)線收發(fā)電路，實(shí)現(xiàn)數(shù)據(jù)的雙向無(wú)線傳輸。收發(fā)電路采用直徑為0.8 mm的漆包線自行繞制成圓形空心線圈天線，天線直徑為（3.4±0.3）cm。試驗(yàn)表明，探測(cè)節(jié)點(diǎn)與監(jiān)測(cè)終端的通信距離為24 cm，通過(guò)橋接方式，節(jié)點(diǎn)收發(fā)功率為102 mW時(shí)，節(jié)點(diǎn)間的通信距離可達(dá)20 cm。與傳統(tǒng)無(wú)線收發(fā)模塊相比，該無(wú)線收發(fā)電路在受體積、功耗、成本限制的場(chǎng)合有廣闊的應(yīng)用前景。 Abstract: Based on ASK technology and with the C8051F340 and C8051F330D MCU as the controller， using half-duplex communication mode， this paper achieves bi-directional data transfer. Transceiver circuit constituted by enameled wire which diameter is 0.8mm and wound into a diameter （3.4±0.3） cm circular hollow coil antenna. Tests show that the communication distance between detection and monitoring of the terminal is 24cm，the distance is up to 20cm between two nodes when using the manner of bridging and the node transceiver power is 102mW. Compared with the conventional wireless transceiver modules， the circuit has wide application prospect in small size， low cost and low power consumption and other characteristics.
標(biāo)簽： C8051F 單片機(jī) 無(wú)線收發(fā) 電路設(shè)計(jì)
上傳時(shí)間： 2013-10-19
上傳用戶：xz85592677
為了在工業(yè)生產(chǎn)及過(guò)程控制中準(zhǔn)確測(cè)量溫度，設(shè)計(jì)了一種基于低功耗MSP430單片機(jī)的數(shù)字溫度計(jì)。整個(gè)系統(tǒng)通過(guò)單片機(jī)MSP430F1121A控制DS18B20讀取溫度，采用數(shù)碼管顯示，溫度傳感器DS18B20與單片機(jī)之間通過(guò)串口進(jìn)行數(shù)據(jù)傳輸。MSP430系列單片機(jī)具有超低功耗，且外圍的整合性高，DS18B20只需一個(gè)端口即可實(shí)現(xiàn)數(shù)據(jù)通信，連接方便。通過(guò)多次實(shí)驗(yàn)證明，該系統(tǒng)的測(cè)試結(jié)果與實(shí)際環(huán)境溫度一致，除了具有接口電路簡(jiǎn)單、測(cè)量精度高、誤差小、可靠性高等特點(diǎn)外，其低成本、低功耗的特點(diǎn)使其擁有更廣闊的應(yīng)用前景。 Abstract: In order to obtain accurate measuring temperature in industrial production and process control， a digital thermometer based on MSP430 MCU is designed. The system uses MSP430F1121A MCU to control DS18B20， and gets the temperature data， which is displayed on the LED. The temperature sensor DS18B20 and MCU transmit data through serial communication. MSP430 series has ultra-low power and high integration， DS18B20 only needs one port to achieve data communication. Through many experimental results prove， this system is consistent with actual environment temperature. The system has characteristics of interface circuit simple， high measuring accuracy， minor error， high reliability， besides， the characteristics of low cost and low power make it having vaster application prospect.
上傳時(shí)間： 2013-10-16
上傳用戶：wettetw
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.
上傳時(shí)間： 2013-11-20
上傳用戶：ynzfm
The MSP-FET430PIF is a Parallel Port interface (does not include target board) that is used to program and debug MSP430 FET tools and test boards through the JTAG interface. This interface is included in our FET tools, but sold without the development board. This interface uses a Parallel PC Port to communicate to the Debugger Software (IAR Kickstart software included) running on the PC. The interface uses the standard 14 pin header to communicate to the MSP430 device using the standard JTAG protocol. The flash memory can be erased and programmed in seconds with only a few keystrokes, and since the MSP430 flash is extremely low power, no external power supply is required. The tool has an integrated software environment and connects directly to the PC which greatly simplifies the set-up and use of the tool. The flash development tool supports development with all MSP430 flash parts. Features MSP430 debugging interface to connect a MSP430-Flash-device to a Parallel port on a PC Supports JTAG debug protocol (NO support for Spy-Bi-Wire (2-wire JTAG) debug protocol, Spy-Bi-Wire (2-wire JTAG) is supported by MSP-FET430UIF) Parallel Port cable and a 14-conductor target cable Full documentation on CD ROM Integrated IAR Kickstart user interface which includes: Assembler Linker Limulator Source-level debugger Limited C-compiler Technical specifications: Backwardly compatable with existing FET tool boards.
上傳時(shí)間： 2013-10-26
上傳用戶：fengweihao158@163.com
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