河 北 建 筑 工 程 学 院本科毕业设计（论文）外文资料翻译 系别： 电气工程系 专业： 建筑电气与智能化 班级： 电智072 姓名： 学号： 外文出处： Electricity 附 件：1、外文原文；2、外文资料翻译译文。指导教师评语：该外文翻译语言流畅通顺，较准确完整地翻译了原文，所翻译文章与毕业设计的课题基本相关，基本达到了本科毕业外文翻译的要求签字： 2011年05月28日weak electricity engineeringSystem functionThe in common use building weak electricity system mainly has a few kinds as follows:(1)The telephone corresponds by letter systemCarry out telephone(include three types of facsimile machines, can see a telephone.etc.) correspondence function The star type To rushes toward structure; Use 3 types(or above) dont shield a double to wring line, deliver the frequency of signal within the scope of audio frequency.(2)Area net system in calculator bureauIs a realization to transact to automate and various data delivers of network foundation The star type to rushes toward structure Use 5 types(or above) dont shield a double to wring line, deliver number signal, the baud rate can reach to a 100 mbs the s is above.(3)Music| broadcast systemThe loudspeaker passed to install on the spot(is like places, such as market, restaurant, guest room and hallway.etc.) broadcasts music, and can pass to transmit sound machine to carry on a broadcasting to the spot Many road total line structure Deliver is certainly pressed a 120 Vs by the power enlarger outputs| the audio frequency signal of 120 s with drive the spot loudspeaker phonation, deliver the line use copper Xin to insulate to lead line.(4)The cabled T.V. signal assigns systemEvenly assign the cabled T.V. signal to each customer inside the building to order ;Adopt branch and assign a machine to carry on a signal allotment, for letting up signal to lose to really reduce and make each customer order the request that the signal quality attains norm rules with , its cloth line is tree type structure, and order to distribute with the form of building and the customer of dissimilarity but dissimilarity Use 75 radio frequency coaxial cable, deliver many road radio frequencies signal.(5)The public security supervises and controls systemThe camera passed to install on the spot, guard against theft equipment like carry on surveillance and excrescent circumstance to report to the police to each exit and entrance and some important places of building etc. ;The video frequency signal delivers to adopt star type structure, use video frequency coaxial cable ;Control delivering of signal to adopt total line structure, the use copper insulates a cable.(6)The fire fight reports to the police systemThe system is reported to the police by a fire and the fire fight is allied the broadcasting system, fire alarm moving system, fire fight to constitute towards speaking 3 parts like telephone system.A fire reports to the police and the fire fight is allied and move system to pass constitution in the building everywhere of a fire locator, hand move to report to the police device etc. to the spot the circumstance carry on a monitor, be have already reported to the police signal, according to receiving of signal, according to in advance setting of procedure, unite the homologous equipments spreads by control fire, its signal delivers to adopt total line structure of many roads, but for important fire fight equipments(if fire fight pump, spray to sprinkle a pump, is pressing breeze machine and line up smoke breeze machine etc.) of allied move to control delivering of signal, sometimes adopt star type structure, the delivering of signal uses copper to insulate a cable.(the product having asks use double to wring line)The fire fight broadcasting system is used for to direct the spot while taking place a fire a personnel safety evacuation, adopt total line structure of many roads, the signal delivers to use copper to insulate to lead line.(the system can and music broadcasting system suitable for use)The fire alarm is two kinds of structure towards speaking that the telephone system is used for in command of spot fire fighter to carry on extinguishing fire a work, adopt star type and total line type, the signal delivers uses to shield line.(7)The exit and entrance controls systemUse calculator, intelligence Carmen equipment, such as lock and card reader.etc., carry on constitution, surveillance, control and record etc. to each exit and entrance status, carry out unify a management to each exit and entrance of building, promise mansion safety, its Tuo rushes toward structure and delivers to lie quality because of product but difference.(8)The parking lot charge manages systemPass to install under the exit and entrance ground of respond coil, respond the discrepancy of vehicle, pass artificial half auto the full-automatic charge management system, carry out a charge and control the Qi of dynamoelectric railing t