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一種實(shí)用的微機(jī)自動(dòng)配料秤系統(tǒng):介紹一種由單片機(jī)構(gòu)成的配料秤。敘述了秤的傳感器、變送器、信號(hào)的變換、硬件原理、軟件流程以及和DCS 系統(tǒng)構(gòu)成的單回路調(diào)節(jié)系統(tǒng),此系統(tǒng)可廣泛地應(yīng)用于各行業(yè)的配料控制中。關(guān)鍵詞:配料秤 單片機(jī) 單回路調(diào)節(jié)系統(tǒng) DCS 系統(tǒng)
Abstract :A proportioning weigher based on single chip computer is introduced. Sensors , transmitters , signal converting , principle of hardware ,software flowchart of proportioning weigher and single loop control system composed with DCS system are emphasized ,this system can be used in proportioning control of various trades extensively.Key Words :Proportioning Weigher ,Single Chip Computer ,Single Loop Control System ,Distributed Control System
標(biāo)簽：
微機(jī)
自動(dòng)
配料秤
上傳時(shí)間：
2013-10-12
上傳用戶：zwei41
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This white paper discusses how market trends, the need for increased productivity, and new legislation have
accelerated the use of safety systems in industrial machinery. This TÜV-qualified FPGA design methodology is
changing the paradigms of safety designs and will greatly reduce development effort, system complexity, and time to
market. This allows FPGA users to design their own customized safety controllers and provides a significant
competitive advantage over traditional microcontroller or ASIC-based designs.
Introduction
The basic motivation of deploying functional safety systems is to ensure safe operation as well as safe behavior in
cases of failure. Examples of functional safety systems include train brakes, proximity Sensors for hazardous areas
around machines such as fast-moving robots, and distributed control systems in process automation equipment such
as those used in petrochemical plants.
The International Electrotechnical Commission’s standard, IEC 61508: “Functional safety of
electrical/electronic/programmable electronic safety-related systems,” is understood as the standard for designing
safety systems for electrical, electronic, and programmable electronic (E/E/PE) equipment. This standard was
developed in the mid-1980s and has been revised several times to cover the technical advances in various industries.
In addition, derivative standards have been developed for specific markets and applications that prescribe the
particular requirements on functional safety systems in these industry applications. Example applications include
process automation (IEC 61511), machine automation (IEC 62061), transportation (railway EN 50128), medical (IEC
62304), automotive (ISO 26262), power generation, distribution, and transportation.
圖Figure 1. Local Safety System
標(biāo)簽：
FPGA
安全系統(tǒng)
上傳時(shí)間：
2013-11-05
上傳用戶：維子哥哥
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Abstract: Designers who must interface 1-Wire temperature Sensors with Xilinx field-programmable gate arrays(FPGAs) can use this reference design to drive a DS28EA00 1-Wire slave device. The downloadable softwarementioned in this document can also be used as a starting point to connect other 1-Wire slave devices. The systemimplements a 1-Wire master connected to a UART and outputs temperature to a PC from the DS28EA00 temperaturesensor. In addition, high/low alarm outputs are displayed from the DS28EA00 PIO pins using LEDs.
標(biāo)簽：
PicoBlaze
Create
Master
Xilinx
上傳時(shí)間：
2013-11-05
上傳用戶：a6697238
-
智能平臺(tái)體感慣性傳感器應(yīng)用 智能互聯(lián) 物聯(lián)傳感 操作系統(tǒng) 體感 慣性傳感 人機(jī)接口 windows8 android
標(biāo)簽：
integrating-motion-and-orientatio
n-Sensors
智能平臺(tái)
傳感器
上傳時(shí)間：
2013-10-07
上傳用戶：Ants
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Abstract: Standard PCB design and mounting processes can adversely influence MEMS inertial Sensors.This application note contains guidelines for the layout, soldering, and mounting of MEMS inertialSensors in LGA packages in order to reduce stresses and improve functionality.
標(biāo)簽：
MEMS
慣性傳感器
焊接
上傳時(shí)間：
2014-01-15
上傳用戶：sjb555
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傳感器技術(shù)作為信息科學(xué)的一個(gè)重要分支，與計(jì)算機(jī)技術(shù)、自動(dòng)控制技術(shù)和通信技術(shù)等一起構(gòu)成了信息技術(shù)的完整學(xué)科。在人類進(jìn)入信息時(shí)代的今天，人們的一切社會(huì)活動(dòng)都是以信息獲取與信息轉(zhuǎn)換為中心，傳感器作為信息獲取與信息轉(zhuǎn)換的重要手段，是信息科學(xué)最前端的一個(gè)陣地，是實(shí)現(xiàn)信息化的基礎(chǔ)技術(shù)之一。
“沒(méi)有傳感器就沒(méi)有現(xiàn)代科學(xué)技術(shù)”的觀點(diǎn)已為全世界所公認(rèn)。以傳感器為核心的檢測(cè)系統(tǒng)就像神經(jīng)和感官一樣，源源不斷地向人類提供宏觀與微觀世界的種種信息，成為人們認(rèn)識(shí)自然、改造自然的有力工具。
傳感器原理及應(yīng)用全書分為十個(gè)章結(jié)：
1、傳感器的基本特性
2、各類傳統(tǒng)與新型傳感器的工作原理與應(yīng)用
（1）應(yīng)變式傳感器
（2）電感式傳感器
（3）電容式傳感器
（4）壓電式傳感器
（5）磁電式傳感器
（6）光電式傳感器
（7）半導(dǎo)體式傳感器
（8）波與輻射式傳感器
（9）數(shù)字式傳感器（自學(xué)）
（10）智能式傳感器（自學(xué)）
課程教材
1.郁有文等編著，傳感器原理及工程應(yīng)用，西安科技大學(xué)出版社，2008
2.沈躍、楊喜峰編，物理實(shí)驗(yàn)教程—智能檢測(cè)技術(shù)實(shí)驗(yàn)，中國(guó)石油大學(xué)出版社，2010
課程參考書
1. 傳感器與檢測(cè)技術(shù)，胡向東等編著，機(jī)械工業(yè)出版社，2009
2. 傳感器原理及應(yīng)用，王化祥編著，天津大學(xué)出版社，2007
3. 傳感技術(shù)與應(yīng)用教程，張洪潤(rùn)等編著，清華大學(xué)出版社，2009
4. 傳感器原理及應(yīng)用（項(xiàng)目式教學(xué)），于彤編著，機(jī)械工業(yè)出版社，2008
5. 傳感器與測(cè)試技術(shù)，葉湘濱等編著，國(guó)防工業(yè)出版社，2007
6. 傳感器與檢測(cè)技術(shù)，陳杰、黃鴻編著，高等教育出版社，2003
7. Handbook of Modern Sensors(3rd Edition)，Jacob Fraden，Springer-Verlag,Inc.，2004
課程性質(zhì)
課程屬于專業(yè)基礎(chǔ)課，在專業(yè)人才培養(yǎng)中具有提高學(xué)生相關(guān)專業(yè)基礎(chǔ)理論的認(rèn)知能力、增強(qiáng)學(xué)生從事傳感與檢測(cè)技術(shù)研究與應(yīng)用工作的適應(yīng)能力和開發(fā)創(chuàng)新能力的作用。
研究對(duì)象
傳感器技術(shù)的基本概念和理論、常用傳感器的工作原理和應(yīng)用技術(shù)。
學(xué)習(xí)目的與要求
（1）建立傳感器技術(shù)的整體概念；
（2）掌握傳感器技術(shù)的基本理論、常用傳感器的工作原理和應(yīng)用技術(shù)；
（3）獲得應(yīng)用傳感器設(shè)計(jì)、組建測(cè)控系統(tǒng)的基本技能；
（4）培養(yǎng)學(xué)生進(jìn)一步學(xué)習(xí)、研究和應(yīng)用傳感器技術(shù)的興趣；
（5）為學(xué)習(xí)后續(xù)課程和獨(dú)力解決實(shí)際問(wèn)題打下必要的基礎(chǔ)。
主要考核目標(biāo)（包括重點(diǎn)及難點(diǎn)）
（1）掌握傳感器的基本概念和基本特性；
（2）掌握常用傳感器的工作原理（實(shí)驗(yàn)方法）；
（3）掌握常用傳感器的基本應(yīng)用（實(shí)驗(yàn)技術(shù)）；
（4）了解應(yīng)用傳感器設(shè)計(jì)、組建測(cè)控系統(tǒng)的基本方法；
（5）了解傳感器技術(shù)的發(fā)展前沿和趨勢(shì)。
重點(diǎn)：傳感器的工作原理
難點(diǎn)：傳感器的應(yīng)用技術(shù)；
內(nèi)容涉及知識(shí)面廣，理論性、綜合性和實(shí)踐性強(qiáng)。
標(biāo)簽：
傳感器原理
教程
上傳時(shí)間：
2013-11-13
上傳用戶：yqs138168
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多遠(yuǎn)程二極管溫度傳感器-Design Considerations for pc thermal management
Multiple RDTS (remote diode temperature sensing) provides the most accurate method of sensing an IC’s junction temperature. It overcomes thermal gradient and placement issues encountered when trying to place external Sensors. PCB component count decreases when using a device that provides multiple inputs.Better temperature sensing improves product performance and reliability. Disk drive data integrity suffers at elevated temperatures. IBM published an article stating that a 5°C rise in operating temperature causes a 15% increase in the drive’s failure rate. The overall performance of a system can be improved by providing a more accurate temperature measurement of the most critical devices allowing them to run just a few degrees hotter.The LM83 directly senses its own temperature and the temperature of three external PN junctions. One is dedicated to the CPU of choice, the other two go to other parts of your system that need thermal monitoring such as the disk drive or graphics chip. The SMBus-compatible LM83 supports SMBus timeout and logic levels. The LM83 has two interrupt outputs; one for user-programmable limits and WATCHDOG capability (INT), the other is a Critical Temperature Alarm output (T_CRIT_A) for system power supply shutdown.
標(biāo)簽：
Considerat
Design
遠(yuǎn)程
二極管
上傳時(shí)間：
2014-12-21
上傳用戶：ljd123456
-
This white paper discusses how market trends, the need for increased productivity, and new legislation have
accelerated the use of safety systems in industrial machinery. This TÜV-qualified FPGA design methodology is
changing the paradigms of safety designs and will greatly reduce development effort, system complexity, and time to
market. This allows FPGA users to design their own customized safety controllers and provides a significant
competitive advantage over traditional microcontroller or ASIC-based designs.
Introduction
The basic motivation of deploying functional safety systems is to ensure safe operation as well as safe behavior in
cases of failure. Examples of functional safety systems include train brakes, proximity Sensors for hazardous areas
around machines such as fast-moving robots, and distributed control systems in process automation equipment such
as those used in petrochemical plants.
The International Electrotechnical Commission’s standard, IEC 61508: “Functional safety of
electrical/electronic/programmable electronic safety-related systems,” is understood as the standard for designing
safety systems for electrical, electronic, and programmable electronic (E/E/PE) equipment. This standard was
developed in the mid-1980s and has been revised several times to cover the technical advances in various industries.
In addition, derivative standards have been developed for specific markets and applications that prescribe the
particular requirements on functional safety systems in these industry applications. Example applications include
process automation (IEC 61511), machine automation (IEC 62061), transportation (railway EN 50128), medical (IEC
62304), automotive (ISO 26262), power generation, distribution, and transportation.
圖Figure 1. Local Safety System
標(biāo)簽：
FPGA
安全系統(tǒng)
上傳時(shí)間：
2013-11-14
上傳用戶：zoudejile
-
Abstract: Designers who must interface 1-Wire temperature Sensors with Xilinx field-programmable gate arrays(FPGAs) can use this reference design to drive a DS28EA00 1-Wire slave device. The downloadable softwarementioned in this document can also be used as a starting point to connect other 1-Wire slave devices. The systemimplements a 1-Wire master connected to a UART and outputs temperature to a PC from the DS28EA00 temperaturesensor. In addition, high/low alarm outputs are displayed from the DS28EA00 PIO pins using LEDs.
標(biāo)簽：
PicoBlaze
Create
Master
Xilinx
上傳時(shí)間：
2013-11-12
上傳用戶：大三三
-
Arduino，是一塊基于開放源代碼的USB接口Simple i/o接口板（包括12通道數(shù)字GPIO，4通道PWM輸出，6-8通道10bit ADC輸入通道），并且具有使用類似Java,C語(yǔ)言的IDE集成開發(fā)環(huán)境。
讓您可以快速使用Arduino語(yǔ)言與Flash或Processing…等軟件，作出互動(dòng)作品。
Arduino可以使用開發(fā)完成的電子元件例如Switch或Sensors或其他控制器、LED、步進(jìn)馬達(dá)或其他輸出裝置。Arduino也可以獨(dú)立運(yùn)作成為一個(gè)可以跟軟件溝通的接口，例如說(shuō)：flash、processing、Max/MSP、VVVV 或其他互動(dòng)軟件…。Arduino開發(fā)IDE接口基于開放源代碼原，可以讓您免費(fèi)下載使用開發(fā)出更多令人驚艷的互動(dòng)作品。
特色：
1、開放源代碼的電路圖設(shè)計(jì)，程序開發(fā)接口免費(fèi)下載，也可依需求自己修改。
2、使用低價(jià)格的微處理控制器(ATMEGA8或ATmega128)?？梢圆捎肬SB接口供電，不需外接電源。也可以使用外部9VDC輸入
3、Arduino支持ISP在線燒，可以將新的“bootloader”固件燒入ATmega8或ATmega128芯片。有了bootloader之后，可以通過(guò)串口或者USB to Rs232線更新固件。
4、可依據(jù)官方提供的Eagle格式PCB和SCH電路圖，簡(jiǎn)化Arduino模組，完成獨(dú)立運(yùn)作的微處理控制?？珊?jiǎn)單地與傳感器，各式各樣的電子元件連接(EX：紅外線,超音波,熱敏電阻,光敏電阻,伺服馬達(dá),…等)
5、支持多種互動(dòng)程序，如：Flash、Max/Msp、VVVV、PD、C、Processing……等
6、應(yīng)用方面，利用Arduino，突破以往只能使用鼠標(biāo)，鍵盤，CCD等輸入的裝置的互動(dòng)內(nèi)容，可以更簡(jiǎn)單地達(dá)成單人或多人游戲互動(dòng)。
標(biāo)簽：
Arduino
上傳時(shí)間：
2013-10-17
上傳用戶：cuiyashuo
