外文翻译 - 火灾报警控制面板.doc

1、外文文献及译文文献、资料题目：Fire alarm control panel文献、资料来源：http:/en.wikipedia.org文献、资料发表（出版）日期： 院 （部）： 专 业： 班 级： 姓 名： 学 号： 指导教师： 翻译日期： 外文文献：Fire alarm control panel A Fire Alarm Control Panel (FACP), or Fire Alarm Control Unit (FACU), is the controlling component of a Fire alarm System. The panel receives infor

2、mation from environmental sensors designed to detect changes associated with fire, monitors their operational integrity and provides for automatic control of equipment, and transmission of information necessary to prepare the facility for fire based on a predetermined sequence. The panel may also su

3、pply electrical energy to operate any associated sensor, control, transmitter, or relay. There are four basic types of panels: coded panels, conventional panels, addressable panels, and multiplex systems.Contents1 Coded Fire Alarm Control Panels2 Conventional Fire Alarm Control Panels3 Multiplex sys

4、tems4 Releasing panels5 Addressable Fire Alarm Control Panels 5.1 Signaling Line Circuits 5.2 Mapping 5.2.1 Zones 5.2.2 Groups 5.2.3 Boolean logic6 Networking7 Monitoring8 System functions 8.1 System reset 8.2 Acknowledge 8.3 Drill 8.4 Walk test 8.5 Signal silence 8.6 Lamp test 9 AC power10 DC power

5、1 Coded Fire Alarm Control PanelsCoded panels were the earliest type of central fire alarm control, and were made during the 1800s to the 1970s. A coded panel is similar in many ways to a modern conventional panel (described below), except each zone was connected to its own code wheel ( i.e. An alar

6、m in zone 1 would sound code 1-2-4 through the bells or horns in the building, while zone 2 would sound 1-2-5), which, depending on the way the panel was set up, would either do sets of four rounds of code until the initiating pull station was reset (similar to a coded(pull station) or run continuou

7、sly until the panel itself was reset. Large panels could take up an entire wall in a mechanical room, with dozens of code wheels. Lists of codes had to be maintained, sometimes with copies posted above pull stations (this setup is commonly seen in older wings of hospitals). Smaller panels could be s

8、et up in one of two ways. Most of the time, the panel would only have one zone, and therefore, only one code. Common one-zone codes were 4-4-0 and 17-0-0 (which is similar to the 120 bpm March Time setting used on later panels, which has in turn been replaced with a interrupted four count uniform te

9、mporal code 3 pattern used since 1996). Alternatively, the panel could be made with no code wheels, using only what was called the gong relay. Normally, this would be used in a system with coded pull stations to retransmit the coding strikes from the pulls. However, it could also be used as its own

10、zone, with the connected horns or bells sounding continuously instead of in a particular code. These panels are not common today, but can sometimes be found in older buildings such as those on college campuses or hospitals.2 Conventional Fire Alarm Control PanelsConventional panels have been around

11、ever since electronics became small enough to make them viable. conventional panels are used less frequently in large buildings than in the past, but are not uncommon on smaller projects such as small schools, stores, restaurants, and apartments.A conventional Fire Alarm Control Panel employs one or

12、 more circuits, connected to sensors initiating devices wired in parallel. These sensors are devised to dramatically decrease the circuit resistance when the environmental influence on any sensor exceeds a predetermined threshold. In a conventional fire alarm system, the information density is limit

13、ed to the number of such circuits used.To facilitate location and control of fire within a building, the structure is subdivided into definite areas or zones. Floors of a multistory building are one type of zone boundary.An Initiating Device Circuit connected to multiple devices within the same zone

14、 of protection, effectively provides 2 bits of information about the zone corollary to the state of the circuit; normal, or off normal and alarm or quiescent. The state of each Initiating Device Circuit within a zone displays at the Fire Alarm Control Panel using visible indications called annunciat

15、orsThese Annunciators may employ a graphical representation of the Zone boundaries on a floor plan (Zone map) using textual descriptions, illuminated icons, illuminated sections, or illuminated points on the map corresponding to Initiating Circuits connected to the Fire Alarm Control Panel.For this

16、reason, slang often inaccurately refers to initiating circuits of a Fire Alarm Control Panel as Zones.Larger systems and increasing demand for finer diagnostic detail beyond broad area location and control functions expanded the control by Zone strategy of conventional systems by providing multiple initiating circuits within a c