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VESDA即早期烟雾报警系统,是 一种基于光学空气监测技术发展的微 处理器控制的样品烟雾检测装置。该系 统由采样管网、扫描仪、过滤器、激光测 量室、空气泵及警报装置组成。系统工 作原理:空气样品由空气泵通过PVC 管网从被监测的环境中连续采集出 来。空气样品进入检测器后即暴露在激 光下,入射光被空气中的烟雾粒子散 射,通过一系列光学元件后到一个固态 的光接收器,光被转换成电信号后传到 控制系统。依烟雾的程度以及预设程序 警报水平,产生一个适宜的输出信号。
VESDA, an early smoke alarm system, is a microprocessor-controlled sample smoke detection device based on the development of optical air monitoring technology. The system consists of a sampling pipe network, a scanner, a filter, a laser measuring chamber, an air pump and an alarm device. System works: air samples from the air pump through the PVC pipe network from the environment were continuously monitored by the acquisition. The air sample enters the detector and is exposed to the laser light. The incident light is scattered by smoke particles in the air and passes through a series of optical elements to a solid-state light receiver. The light is converted into an electrical signal and transmitted to the control system. Depending on the level of smoke and the preset level of alarm, a suitable output signal is generated.