烟雾和其它火灾报警器的作用是当火灾发生时,向人们发出警报,以便人们采取恰当的措施,如灭火行动(如果可能的话,并且有恰当的工具可用时),或者从起火建筑中疏散出来(自己以及负责照看的人员,如儿童、病人和老人),防止火灾对人员造成伤害。为了做到这一点,报警系统的探测元件必须尽早并可靠地探测到火灾发生,同时要避免非火灾现象触发报警。基于火灾探测,仅在报警时发出火灾信号,而在其它时候保持“沉默”。通常这个信号应是响亮的且易于识别的,可被人们注意到以便尽早地采取应对措施。在 The purpose of smoke and other fire alarms is to alert people when a fire occurs so that people can take appropriate action, such as putting out a fire (if possible, with the right tools available) or evacuating from a fire building (Themselves and those responsible for childcare, such as children, the sick and the elderly) to prevent fire from harming people. In order to do this, the detection elements of the alarm system must detect the occurrence of a fire as early as possible and reliably, and at the same time avoid the non-fire phenomenon from triggering the alarm. Based on fire detection, a fire signal is emitted only during an alarm, and remains “silent” at other times. Often the signal should be loud and easy to recognize and can be noticed by people for early response. in