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Measurement

  • 使用傳感器KMZ41和傳感器信號調節芯片UZZ9001,構建基于MR天使測量系統

    Angle Measurement is frequently required in both automotive and industrial applications. Contactl

    標簽: 9001 KMZ UZZ 傳感器

    上傳時間: 2013-05-18

    上傳用戶:cuiqiang

  • 簡化精密測量的高輸入阻抗ADC

      High input impedance and a wide input range are twohighly desirable features in a precision analog-to-digitalconverter, and the LTC®2449 delta-sigma ADC has both.With just a few external components, the LTC2449 formsan exceptional Measurement system with very high inputimpedance and an input range that extends 300mV beyondthe supply rails.

    標簽: ADC 精密測量 高輸入阻抗

    上傳時間: 2013-11-02

    上傳用戶:ywcftc277

  • 諧振器論文精選.rar

    Control systems are becoming increasingly dependent on digital processing and so require sensors able to provide direct digital inputs. Sensors based on time Measurement, having outputs based on a frequency or phase, have an advantage over conventional analogue sensors in that their outputs can be measured directly in digital systems by pulse counting.

    標簽: 諧振器 論文

    上傳時間: 2013-10-08

    上傳用戶:wuyuying

  • ADC轉換器技術用語 (A/D Converter Defi

    ANALOG INPUT BANDWIDTH is a measure of the frequencyat which the reconstructed output fundamental drops3 dB below its low frequency value for a full scale input. Thetest is performed with fIN equal to 100 kHz plus integer multiplesof fCLK. The input frequency at which the output is −3dB relative to the low frequency input signal is the full powerbandwidth.APERTURE JITTER is the variation in aperture delay fromsample to sample. Aperture jitter shows up as input noise.APERTURE DELAY See Sampling Delay.BOTTOM OFFSET is the difference between the input voltagethat just causes the output code to transition to the firstcode and the negative reference voltage. Bottom Offset isdefined as EOB = VZT–VRB, where VZT is the first code transitioninput voltage and VRB is the lower reference voltage.Note that this is different from the normal Zero Scale Error.CONVERSION LATENCY See PIPELINE DELAY.CONVERSION TIME is the time required for a completeMeasurement by an analog-to-digital converter. Since theConversion Time does not include acquisition time, multiplexerset up time, or other elements of a complete conversioncycle, the conversion time may be less than theThroughput Time.DC COMMON-MODE ERROR is a specification which appliesto ADCs with differential inputs. It is the change in theoutput code that occurs when the analog voltages on the twoinputs are changed by an equal amount. It is usually expressed in LSBs.

    標簽: Converter Defi ADC 轉換器

    上傳時間: 2013-11-12

    上傳用戶:pans0ul

  • 高速數字系統設計下載pdf

    高速數字系統設計下載pdf:High-Speed Digital SystemDesign—A Handbook ofInterconnect Theory and DesignPracticesStephen H. HallGarrett W. HallJames A. McCallA Wiley-Interscience Publication JOHN WILEY & SONS, INC.New York • Chichester • Weinheim • Brisbane • Singapore • TorontoCopyright © 2000 by John Wiley & Sons, Inc.speeddigital systems at the platform level. The book walks the reader through everyrequired concept, from basic transmission line theory to digital timing analysis, high-speedMeasurement techniques, as well as many other topics. In doing so, a unique balancebetween theory and practical applications is achieved that will allow the reader not only tounderstand the nature of the problem, but also provide practical guidance to the solution.The level of theoretical understanding is such that the reader will be equipped to see beyondthe immediate practical application and solve problems not contained within these pages.Much of the information in this book has not been needed in past digital designs but isabsolutely necessary today. Most of the information covered here is not covered in standardcollege curricula, at least not in its focus on digital design, which is arguably one of the mostsignificant industries in electrical engineering.The focus of this book is on the design of robust high-volume, high-speed digital productssuch as computer systems, with particular attention paid to computer busses. However, thetheory presented is applicable to any high-speed digital system. All of the techniquescovered in this book have been applied in industry to actual digital products that have beensuccessfully produced and sold in high volume.Practicing engineers and graduate and undergraduate students who have completed basicelectromagnetic or microwave design classes are equipped to fully comprehend the theorypresented in this book. At a practical level, however, basic circuit theory is all thebackground required to apply the formulas in this book.

    標簽: 高速數字 系統設計

    上傳時間: 2013-10-26

    上傳用戶:縹緲

  • PC板布局技術

    PCB methodologies originated in the United States.Units of Measurement are therefore typically in Imperial units, not SI/metric units.

    標簽: 布局技術

    上傳時間: 2014-01-07

    上傳用戶:asdkin

  • 電能計量和安全性的智能電網

    Abstract: It may sound trite, but it is definitely true: the smart grid has the potential to completely transform the energyindustry. However, smart meters and grid management alone will not ensure the success of the smart grid. Unliketraditional IT networks, smart grids require consideration of energy Measurement and security. To completely optimize thistechnology, smart grid designs must focus on energy Measurement and security. This tutorial considers the benefits ofboth energy Measurement and security and how they make machine-to-machine networks different from traditional IT.

    標簽: 電能計量 安全性 智能電網

    上傳時間: 2013-10-29

    上傳用戶:皇族傳媒

  • 基于PIC16LF874單片機的電容測量模塊

    為提高電容測量精度,針對電容式傳感器的工作原理設計了基于PIC16LF874單片機電容測量模塊。簡單闡述了電容測量電路的應用背景和國內外研究現狀,介紹了美國Microchip公司PIC16LF874單片機的特性。電容式傳感器輸出的動態微弱電容信號通過PS021型電容數字轉換器把模擬量數據轉換成數字量數據,所測數據由PIC16LF874單片機應用程序進行處理、顯示和保存。實驗結果表明,固定電容標稱值為10~20 pF 的測量值相對誤差在1%以內,同時也可知被測電容容值越大,測量值和標稱值相對誤差越小。 Abstract:  To improve the accuracy of capacitance Measurement,aimed at the principle of work of mercury capacitance acceleration transducer,the design of micro capacitance Measurement circuit is based on the key PIC16LF874 chip. Briefly discusses the application of the capacitance measuring circuit for the background and status of foreign researchers,focusing on the United States PIC16LF874 microcontroller features. Capacitive sensor outputed signal through the dynamics of weak PS021-chip capacitors (capacitancedigital converter) to convert analog data into digital data,the measured data from the PIC16LF874 microcontroller application process, display and preservation. Experimental results show that the fixed capacitor 10pF ~ 20pF nominal value of the measured value of relative error is within 1%,but also it canbe seen the value of the measured capacitance larger,measuring value and the nominal value of relative error smaller.

    標簽: PIC 874 16 LF

    上傳時間: 2013-10-29

    上傳用戶:wojiaohs

  • 基于ARM單片機的自動測高測距小車

    生活中許多目標的高度和水平距離需要進行測量。目前主要的測量方法,仍以傳統的皮尺丈量為主,測量效率不高,有時還很不方便,沒有技術成熟的數字式測高測距產品。以基本的數學方法為理論依據,利用遙控小車做為載體,采用角度傳感器測量角度、霍爾傳感器測量水平距離等,通過單片機LM3S615進行數據計算,實現了對待測目標物體的高度、水平距離等數據的快速、精確和數字式的測量,高度測量精度可達99.06%,水平測量精度則可達98.06%。 Abstract:  In our lives, the height and horizontal distance of some goals are needed to be measured. Because the currently used methods are still traditional tape-based measuring methods, and the measuring efficiency is low and inconvenient so some kinds of digital and portable measuring methods or instruments are needed. Based on the basic math theory, this paper designed and manufactured a portable, digital and remote controlled measuring mobile small vehicle, which assembled with angle measuring sensor for angle Measurement and Hall sensor for horizontal distance measuring. MCU LM3S615 calculated the height and horizontal distance data gotten from these sensors. The measuring process is simple, the measuring results are more accurate and the measuring efficiency is higher than traditional measure instruments. The accuracy of height and distance Measurement can reach 99.06% and 98.06%.

    標簽: ARM 單片機 自動

    上傳時間: 2013-10-30

    上傳用戶:jackandlee

  • 基于單總線式無線溫度采集系統設計

    為提高溫度測量效率,降低系統的成本,擴展傳輸距離,設計出一種新型溫度采集系統。單片機通過控制具有單總線方式的溫度傳感器DS18B20實現對溫度的測量,同時單片機通過控制具有單總線方式300~450MHz頻率范圍內的MAX7044與MAX7033無線發射與接收芯片實現溫度數據的無線傳輸。與傳統溫度采集系統相比,該系統利用單總線方式連接,采用無線傳輸方式實現遠距離通信,易于系統的集成與擴展。實驗結果表明,該系統結構簡單、方便移植,能夠同時實現多達上百點溫度的測量與500m范圍的傳輸。 Abstract:  To improve the temperature Measurement efficiency and reduce system cost,expansion of transmission distance,a new type of temperature acquisition system is designed.Microcontroller controlled temperature sensor DS18B20which has a single-bus achieves temperature Measurement,while microcontroller by controlled the MAX7044and MAX7033chip with a single-bus and having300~450MHz radiofrequency to achieve the wireless transmission of temperature data.Compared with conventional temperature acquisition system,the system uses single-bus connected,and uses wireless transmission means to achieve long-distance communications,easy-to-system integration and expansion.The experimental results show that the system is simple,convenient transplantation,and can be implemented in as many as a hundred-point temperature measure-ment and the transmission range of500meters.

    標簽: 單總線 無線溫度 采集 系統設計

    上傳時間: 2013-10-29

    上傳用戶:515414293

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