The Internet of Things is considered to be the next big opportunity, and challenge, for the
Internet engineering community, users of technology, companies and society as a whole. It
involves connecting embedded devices such as sensors, home appliances, weather stations
and even toys to Internet Protocol (IP) based networks. The number of IP-enabled embedded
devices is increasing rapidly, and although hard to estimate, will surely outnumber the
number of personal computers (PCs) and servers in the future. With the advances made over
the past decade in microcontroller,low-power radio, battery and microelectronic technology,
the trend in the industry is for smart embedded devices (called smart objects) to become
IP-enabled, and an integral part of the latest services on the Internet. These services are no
longer cyber, just including data created by humans, but are to become very connected to the
physical world around us by including sensor data, the monitoring and control of machines,
and other kinds of physical context. We call this latest frontier of the Internet, consisting of
wireless low-power embedded devices, the Wireless Embedded Internet. Applications that
this new frontier of the Internet enable are critical to the sustainability, efficiency and safety
of society and include home and building automation, healthcare, energy efficiency, smart
grids and environmental monitoring to name just a few.
標(biāo)簽：
Embedded
Internet
Wireless
6LoWPAN
The
上傳時(shí)間：
2020-05-26
上傳用戶：shancjb
以單片機(jī)控制A/D轉(zhuǎn)換器TLC549為例,對(duì)A/D轉(zhuǎn)換器的主要技術(shù)指標(biāo)進(jìn)行了分析研究,在Proteus平臺(tái)下,完成了A/D轉(zhuǎn)換電路的構(gòu)建,采用器件工作時(shí)序方式進(jìn)行程序編寫,借助仿真圖表、虛擬儀器等工具對(duì)A/D轉(zhuǎn)換的數(shù)據(jù)進(jìn)行測(cè)量并對(duì)失調(diào)誤差、增益誤差、微分非線性、積分非線性和轉(zhuǎn)換時(shí)間等重要參數(shù)進(jìn)行了詳細(xì)分析。結(jié)果表明:使用Proteus軟件可對(duì)A/D轉(zhuǎn)換過程進(jìn)行定性分析,將抽象的A/D轉(zhuǎn)換器技術(shù)指標(biāo)直觀化、形象化展現(xiàn)出來,有助于學(xué)生更好地理解A/D轉(zhuǎn)換過程。The main technical indicators of A/D converter were analyzed and studied with an example from A/D converter TLC2543 which is controlled by using SCM.It was completed the construction of the A/D converter circuit under the Proteus software.The programming based on the operation sequence of the chip is put forward.With the aid of the simulation tools such as virtual instrument,simulation charts provided by Proteus,the important parameters of circuit such as offset error,gain error,differential nonlinearity(DNL),integral nonlinearity (INL) and conversion time are analyzed detailedly.Simulation results show that the A/D conversion process can be qualitatively analyzed and visualized the abstract indicators of A/D.The system can help students better to understand the SCM conversion process.
標(biāo)簽：
proteus
單片機(jī)
模數(shù)轉(zhuǎn)換
上傳時(shí)間：
2022-04-04
上傳用戶：
