畢業(yè)設(shè)計(jì)通信專業(yè)相關(guān)文獻(xiàn)翻譯--一個(gè)基于電話網(wǎng)絡(luò)的迷你型遠(yuǎn)程維護(hù)終端設(shè)備系統(tǒng)的設(shè)計(jì)

1、原文： 原文：SYSTEM DESIGN FOR A MINI-TYPE REMOTE MAINTAINING TERMINAL DEVICE BASED ON A TELEPHONE NETWORKABSTRACTThe remote maintaining and diagnosis technology is very important for the distributed and distant on-the-spot eq

2、uipments and devices for monitoring，predicting，and diagnosing failure．This paper presents a new kind of mini-type remote maintaining terminal devices based on a telephone network．The system design and implementation is d

3、escribed in detail in the paper．The device is composed of a integrated circuit，telephone dial unit，modulation unit，central processing unit，button input unit and display unit．The mini-type remote maintaining terminal devi

4、ce communicates and exchanges information with the distributed and distant on-the-spot equipments and devices for monitoring, predicting, and diagnosing failure．The data is transmitted through the public switched telepho

5、ne network (PSTN)．It can communicate with remote equipments, gather the various parameter data of the devices such as power, power factor, and frequency from the remote industrial equipments．It can also be used to contro

6、l the remote devices．In the paper, the hardware and circuit design is described in detail．The device is practically very important for monitoring，predicting，and diagnosing failure with a low total cost．Keywords：remote da

7、ta exchange device, PSTN, circuit design, DCE1．INTRODUCTIONInformation communication with remote computers or equipment is of great importance in numerous industrial applications and public data services．Many kinds of co

8、mmunication and data-transmitting systems have used data communication equipment (DCE)to exchange information．The special-purpose data communication equipment(DCE)has a important practical role in those systems, because

9、they are cheaper and more convenient than the systems built up by the computer network to form a distributed environment．The DCE call often satisfy the required special-purpose communication system in many special fields

10、．A number of experiments and researches have been done regarding the remote data exchange devices in recent years．Many investigators have explored the special devices that exchange data through public switched telephone

11、network．Reddy reported a device that could transmit data over telephone networks．He proposed the basic principles of data transmission over the Public Switched Telephone Network (PSTN)．Hong Sun investigated a kind of HUS

12、T-B remote terminal devices, which consisted of computers and measurement devices．It could communicate with remote equipment；gather the parameter data of power, power factor, and frequency from the remote industrial equi

13、pment．It could also be used to control the remote devices．Shuping Mao designed a real-time remote data gathering device based on a Neuron chip and network technologies．Zhiwei Jia reported a device that utilized PC ISA sl

14、ots．It realized data exchange between a power system and the remote terminalmachines．Hui Huang suggested a system structure of an Internet based radiotherapy diagnose system with some kind of remote devices．Although many

15、 researchers have investigated the remote data exchange system with the Figure 1: A small-scale communication network and data exchange application systemFigure 2：The mini-type remote data exchange deviceThe mini-type re

16、mote data exchange device consists of a number of integrated circuits such as a telephone dial device，modulate integrated circuit, central processing unit, button input device and display device．The device has many advan

17、tages such as small，easy to carry, relatively cheap, easy to operate andlow data transmission cost．Figure 2 shows the appearance of the device．3．CIRCUIT DESIGN OF MINI-TYPE REMOTE DATA EXCHANGE DEVICE3.1 The Device Infra

18、structure1)Central processing unit：Namely CPU．It is a single chip micyoco(SCM), such as INTEL 51 SCM series．It is used to control all other components and to coordinate work of all devices．2）Telephone dial device：It is u

19、sed to dial and produce Dual-tone-multi-frequency (DTMF) signal or pulse signal．It is used to choose the datum data exchange server at the remote host computer before setting up a connection with the host computer．This d