本科毕业生外文文献翻译 学生姓名：* * 指导教师：** 所在学院：信息技术学院 专 业：电气工程及其自动化 中国·大庆 2 0 1 2 年 5 月 1 Automatic fire alarm system The traditional electron safe alarm system mainly is through the sensor automatic detection, produces the alarm, sends out the alarm from the scene or reports to the police through the special electric cable near distance, thus causes people's vigilance. Through many years research and the development, the present alarm apparatus may say is the class is multitudinous. As a result of the alarm apparatus rapid development and the social each domain anxious need, can the application domain be more and more many, specially is rapidly develops in the civil domain. In recent years, the infrared alarm apparatus already became reports to the police a domain hot spot, because it used was not the obviously infrared acquisition, there for had the hiding to be good, characteristic and so on security. Theinfrared sensor is different according to the mechanism may divide into the light survey and the hot survey. The light acquisition sensor is uses the photon effect the infrared acquisition aid. This kind of sensor speed of response quick, the sensitivity high, the examination characteristic is good, but needs to cool, uses not conveniently. Moreover the component examination sensitivity and the infrared wave length concern. The hot acquisition sensor is uses hotly releases the electricity effect the infrared acquisition aid. After receives the goal the infrared radiation temperature increment, the temperature elevates causes the sensor interior certain physical quantities changes, through examination physical quantity change definite infrared emission. This kind of se...
