最新IT专业英语UNIT17 Internet of Things(共51张PPT课件).pptx
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1、UNIT 17 Internet of Things UNIT17 Internet of Things 17-1 Technical Part17-2 Reading Material 第一页,共五十一页。UNIT 17 Internet of Things 第二页,共五十一页。UNIT 17 Internet of Things 第三页,共五十一页。UNIT 17 Internet of Things 17-1 Technical Part 17-1-1 Definition Internet of things refers to uniquely identifiable object
2、s (things) and their virtual representations in an Internet-like structure. The term Internet of things was first used by Kevin Ashton in 1999. The concept of the Internet of Things first became popular through the Auto-ID Center and related market analysts publications. 第四页,共五十一页。UNIT 17 Internet o
3、f Things Radio-frequency identification (RFID) is often seen as a prerequisite for the Internet of things. If all objects of daily life were equipped with radio tags, they could be identified and inventoried by computers. However, unique identification of things may be achieved through other means s
4、uch as barcodes or 2D-codes as well.第五页,共五十一页。UNIT 17 Internet of Things 17-1-2 IntroductionsActually IOT refers to realizing the communication and interconnection between man and man, man and things, as well as things and things within the coverage of network, and acquiring or transferring relevant
5、 information or instructions through the appropriate WSN(wireless sensor network) platform such as 3G, Zigbee, Wifi, Bluetooth, etc. Its information transformation mode can be point to point or point to face. The Figure 17-1 shows the IOT component.第六页,共五十一页。UNIT 17 Internet of Things Figure 17-1 IO
6、T component第七页,共五十一页。UNIT 17 Internet of Things 1. Architecture of IOTThe Internet of things can be divided into three layers: the perception layer, network layer and application layer. Figure 17-2 shows the structure of the typical IOT.第八页,共五十一页。UNIT 17 Internet of Things Figure 17-2 The structure
7、of the typical IOT第九页,共五十一页。UNIT 17 Internet of Things Perception layerPerception layer is the interconnection of skin or facial features for object recognition, information acquisition. It comprises a two-dimension code label and reader, the RFID tag and reader, camera, GPS, sensors, sensor network
8、s, terminals, etc.,which has the same function with humans skin and facial features and is mainly effective to object recognition, information collection. Perception layer includes various types of sensors, cameras, GPS and other senses, such as RFID, Bluetooth, Zigbee, Wifi technology to realize th
9、e sensing network, and play a role of communication gateway to implement transparent transmission.第十页,共五十一页。UNIT 17 Internet of Things At present, its task is object recognition, collection and capturing information, which requires sensitive, comprehensive ability and need to solve the issues of low
10、 power consumption, miniaturization, harsh environment and low cost. Below Figure 17-3 shows the typical perception layers devices and technologies.第十一页,共五十一页。UNIT 17 Internet of Things Figure 17-3 The typical devices and technologies in perception layer 第十二页,共五十一页。UNIT 17 Internet of Things Network
11、 layerThe network layer is the interconnection of neural and brain information, and complete information transfer ring and processing. It includes the combination of communication and Internet network, the network management center, information center and intelligent processing center. Network layer
12、 transfers and processes the information from the Perception layer, which is similar to the central nervous system and brain of the human. The network layer belong to the telecommunication domain, which typically has three parts: Radio Access network, Core network and Co-operating network as below F
13、igure 17-4. 第十三页,共五十一页。UNIT 17 Internet of Things Application layer Application layer of the Internet of things“is the result of social labor division and industry requirement”, thereby, a wide range of intelligent. It can implement intelligent industry under the circumstance of the deepen combinati
14、ons of IOT and modern industry and requirement of profession, which resembles the human social labor division, and the final formation of human society.第十四页,共五十一页。UNIT 17 Internet of Things Figure 17-4 The basic architecture of network layer第十五页,共五十一页。UNIT 17 Internet of Things 2. Three Key Technolo
15、giesThere are three key technologies in IOT, which is sensor technologies, RFID tag technology and the technology of embedded system.第十六页,共五十一页。UNIT 17 Internet of Things Sensor technologySensor technology is the key technology in computer application. Majority of computer processing are digital sig
16、nal. Computers require sensors to convert analogy signals into digital signals which can be processed since they occur.第十七页,共五十一页。UNIT 17 Internet of Things RFID tag technologyThe RFID tag is also a kind of sensor technology, which is the integration of a wireless radio frequency and embedded techno
17、logy, and has a wide range of application in the automatic identification and goods logistics management industry.第十八页,共五十一页。UNIT 17 Internet of Things Embeded SystemThe technology of embedded system is a complex technology which is combined of computer hardware and software, sensor technology, inte
18、grated circuit technology, electronic application technology. After decades of development, the intelligent terminal products based on the embedded system characteristics can be seen everywhere small to portable MP3 to the Aerospace Satellite system. Embedded system is increasingly changing the peop
19、les life and promotes the industrial production and the development of national defence industry. 第十九页,共五十一页。UNIT 17 Internet of Things If we compare human to the Internet as a simple analogy, then sensor equal to the eyes, nose, skin and other senses, the network is equal to the nervous system used
20、 to transmit information, the embedded system is equal to the human brain to process classification after receiving information. This example is a good description of the role of the sensor and the embedded system in the Internet of things.第二十页,共五十一页。UNIT 17 Internet of Things 17-1-3 Application Cas
21、e or Example 1. Application 1: Automatic meter reading, or AMRAMR is the application of IOT which automatically collecting consumption, diagnostic, and status data from water meter or energy metering devices (gas, electric). and transferring that data to a central database for billing, troubleshooti
22、ng, and analyzing. This technology mainly saves utility providers the expense of periodic trips to each physical location to read a meter. 第二十一页,共五十一页。UNIT 17 Internet of Things Another advantage is that billing can be based on near real-time consumption rather than on estimates based on past or pre
23、dicted consumption. This timely information coupled with analysis can help both utility providers and customers better control the use and production of electric energy, gas usage, or water consumption. 第二十二页,共五十一页。UNIT 17 Internet of Things AMR technologies include handheld, mobile and network tech
24、nologies based on telephony platforms (wired and wireless), radio frequency (RF), or power line transmission. The below Figure 17-5 show the whole structure of the ARM solution. 第二十三页,共五十一页。UNIT 17 Internet of Things Figure 17-5 Structure of the ARM solution第二十四页,共五十一页。UNIT 17 Internet of Things 2.
25、Application 2: Smart Home/Digital familySmart Home products integrated automation control systems, computer network system and network communication technology, and use the various home devices (such as audio and video equipment, lighting, curtains control, air condition, security systems, digital t
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