設(shè)計一種基于P89V51RD2的功率因數(shù)測量儀，采用光電隔離器和專用數(shù)碼管驅(qū)動器。該測量儀是以增強型單片機(jī)P89V51RD2為核心，大大簡化系統(tǒng)硬件設(shè)計。而軟件部分采用模塊化設(shè)計思想，采用中值濾波和小數(shù)補償算法，實現(xiàn)功率因數(shù)的高精度測量。實驗測試表明，該功率因數(shù)測量儀測量精度高，運行穩(wěn)定可靠。 Abstract: A power－factor measurement instrument based on P89V51RD2is designed，which uses optical coupler and specific LED drive chip.The power factor measurement instrument uses P89V51RD2as a core of which greatly simplifies the system design.Furthermore，modularization software is developed in detail.The high precision power－factor Measuring system is realized by the center value filter and fractional compensation algorithm.Experiments manifests that the power－ factor measurement instrument is high precision，steady and reliable.
上傳時間： 2014-12-27
上傳用戶：CHINA526
飛機(jī)電網(wǎng)故障時，機(jī)載電氣盒必須在延遲時間內(nèi)切斷電網(wǎng)，保護(hù)機(jī)載設(shè)備。采用AT89S52設(shè)計的電氣盒測試儀能夠測試電氣盒保護(hù)功能，測量延遲時間。實際應(yīng)用結(jié)果表明，該測試儀具有測量準(zhǔn)確、可靠性高、成本低等優(yōu)點。 Abstract: The helicopter-electrical-box must shut off the helicopter power，protect the equipments of the helicopter when the helicopter power is failed.The tester for the helicopter-electrical-box based on AT89S52is used for testing the protect-ing function and Measuring the delay time.Application results show this tester has some advantages,such as accurate mea-surement,high dependability,economical cost etc.
上傳時間： 2014-12-27
上傳用戶：786334970
采用單片機(jī)AT89C2051實現(xiàn)溫度測量與控制,鍵盤和顯示電路實現(xiàn)溫度的設(shè)定、修改、清零以及當(dāng)前溫度值的顯示,并對溫度超過上下限進(jìn)行報警。闡述了該系統(tǒng)設(shè)計的硬件和軟件設(shè)計。 Abstract: The system of temperature Measuring and controling is realized based on AT89C2051.The keyboard and display circuit is designed,which can be used for setting and modifying temperature value,resetting and displaying the present temperature value.At the same time the warning circuit is also designed in the system,which can deal with the alarm when temperature exceeds the upper limit and the lower limit.The hardware and software design of the system are explained．
上傳時間： 2013-11-18
上傳用戶：leehom61
介紹基于ATmega8型單片機(jī)的溫度測量及加熱控制系統(tǒng)。分析系統(tǒng)的工作原理，詳盡討論系統(tǒng)的硬件電路和軟件流程。實驗證明，該系統(tǒng)工作可靠，穩(wěn)定性高。 Abstract: The new temperature Measuring and heating control system based on ATmega8 MCU is introduced.The system’s working principles is analyzed.The design principles of hardware and software are also discussed in detail.This system has been testified and it works steady and reliably.
標(biāo)簽： ATmgea8 單片機(jī) 加熱控制
上傳時間： 2013-11-21
上傳用戶：caiguoqing
將現(xiàn)行的供暖計費方式由按建筑面積計費變?yōu)榘聪牡臒崮苡嬞M是供暖計費方式發(fā)展趨勢，為了滿足這一計費方式變化的需要，設(shè)計了基于IC卡的預(yù)付費式新型供暖計費系統(tǒng)，通過測量用戶采暖系統(tǒng)進(jìn)出口的溫度和流量，計算用戶消耗的熱能，利用IC卡記錄用戶預(yù)付費的金額和當(dāng)年熱能的單價，根據(jù)熱能消耗和當(dāng)年熱能的單價計算用戶采暖費，根據(jù)實際發(fā)生的供暖費用和預(yù)付費金額控制供暖的開停，這一計費方式的變化使供暖計費更趨合理。 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
標(biāo)簽： IC卡 計費 系統(tǒng)設(shè)計
上傳時間： 2013-10-14
上傳用戶：大融融rr
為了在工業(yè)生產(chǎn)及過程控制中準(zhǔn)確測量溫度，設(shè)計了一種基于低功耗MSP430單片機(jī)的數(shù)字溫度計。整個系統(tǒng)通過單片機(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只需一個端口即可實現(xiàn)數(shù)據(jù)通信，連接方便。通過多次實驗證明，該系統(tǒng)的測試結(jié)果與實際環(huán)境溫度一致，除了具有接口電路簡單、測量精度高、誤差小、可靠性高等特點外，其低成本、低功耗的特點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.
上傳時間： 2013-10-16
上傳用戶：wettetw
This application report discusses the design of non-invasive optical plethysmographyalso called as pulsoximeter using the MSP430FG437 Microcontroller (MCU). Thepulsoximeter consists of a peripheral probe combined with the MCU displaying theoxygen saturation and pulse rate on a LCD glass. The same sensor is used for bothheart-rate detection and pulsoximetering in this application. The probe is placed on aperipheral point of the body such as a finger tip, ear lobe or the nose. The probeincludes two light emitting diodes (LEDs), one in the visible red spectrum (660nm) andthe other in the infrared spectrum (940nm). The percentage of oxygen in the body isworked by Measuring the intensity from each frequency of light after it transmitsthrough the body and then calculating the ratio between these two intensities.
標(biāo)簽： Pulsoximeter Single-Chip Des
上傳時間： 2013-10-27
上傳用戶：黑漆漆
本文介紹了一種基于單片機(jī)的健身車轉(zhuǎn)速測量系統(tǒng)。該系統(tǒng)具有電路簡單、使用方便等特點。文中詳細(xì)介紹了該系統(tǒng)的工作原理,并且給出了它的硬件原理圖和軟件設(shè)計程序框圖。關(guān)鍵詞:轉(zhuǎn)速 單片機(jī) 測量ABSTRACT :This paper introduces a Measuring system of the rotational velocity of exercise bike based on single - chip microcomputer . It has such advantages : simple circuit ,convenient use and so on. The work principle is presented in detail in this paper and the block diagram of hardware and program flow chart are giv2 en as well .KEYWORDS :Rotational velocity Single - chip microcomputer Measuring
標(biāo)簽： 單片機(jī) 中的應(yīng)用 轉(zhuǎn)速測量
上傳時間： 2013-11-02
上傳用戶：源弋弋
基于LabVIEW和單片機(jī)的空調(diào)溫度場測量系統(tǒng)的研究:室內(nèi)溫度是空調(diào)系統(tǒng)舒適性的重要指標(biāo),對其及時、準(zhǔn)確地測量顯得非常重要。介紹單片機(jī)AT89C51 和數(shù)字式、單總線型溫度傳感器DS18B20 組成矩形測量網(wǎng)絡(luò)采集空調(diào)室內(nèi)40 點溫度,LabVIEW作為開發(fā)平臺,二者之間通過串口實現(xiàn)數(shù)據(jù)通信,利用LabVIEW強大的數(shù)據(jù)處理和顯示功能對采集的空調(diào)溫度場數(shù)據(jù)進(jìn)行實時處理、分析和顯示,詳細(xì)介紹了系統(tǒng)的硬件結(jié)構(gòu)和軟件模塊的設(shè)計方案。關(guān)鍵詞:單片機(jī);DS18B20 ;LabVIEW;串行通信 Abstract : Temperature is a very important criterion of air condition system′s comfort , so it is very significant to measure it accurately and real timely. This paper int roduces a data acquisition system of Measuring 40 point s temperature for air condition room based on single wire digital sensor DS18B20 and microcont roller AT89C51 which are composed of rectangle Measuring meshwork. The data communication between LabVIEW and microcont roller is executed via serial port ,and the temperature field data of air condition room are processed analyzed and displayed on LabVIEW. The hardware and software modules are also given in detail.Keywords : single chip ;DS18B20 ;LabVIEW; serial communication
標(biāo)簽： LabVIEW 單片機(jī) 空調(diào) 溫度場
上傳時間： 2014-05-05
上傳用戶：KSLYZ
Delta-sigma ADCs, with their high accuracy and high noiseimmunity, are ideal for directly Measuring many typesof sensors. Nevertheless, input sampling currents canoverwhelm high source impedances or low-bandwidth,micropower signal conditioning circuits. The LTC®2484family of delta sigma converters solves this problem bybalancing the input currents, thussimplifying or eliminatingthe need for signal conditioning circuits.
上傳時間： 2015-01-03
上傳用戶：潛水的三貢
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