首页> 外国专利> Scattered light smoke detector with two colour light emitting diodes and a common photosensor or with a two colour light emitting diode and with two photosensors, each in a forward and backwards scattered light arrangement

Scattered light smoke detector with two colour light emitting diodes and a common photosensor or with a two colour light emitting diode and with two photosensors, each in a forward and backwards scattered light arrangement

机译：具有两个彩色发光二极管和一个普通光电传感器的散射光烟雾探测器，或者具有两个彩色发光二极管和两个光电传感器的散射光烟雾探测器，每个传感器都具有向前和向后的散射光布置

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摘要

The invention relates to a scattered light smoke detector (100) with a detection unit (10) operating according to the scattered light principle. It has a first and second light-emitting diode (1V, 1R) for irradiating particles to be detected and a spectrally sensitive common photosensor (2), the two light-emitting diodes each having a transmitting axis (SA) and the photosensor having a receiving axis (EA). Both LEDs and the photosensor are arranged and aligned with each other such that all axes lie in a common plane (W). The first light-emitting diode is arranged with the photosensor at a forward scattering angle (± V) and the second light-emitting diode with the photosensor at a backward spread angle (± R). According to the invention, both light-emitting diodes each have a first and a second LED chip (3, 4) for emitting a respective first and second light bundle (BL, RO) with light in a first and in a second wavelength range different therefrom. Alternatively, the smoke detector has only one light-emitting diode (1) and a first and second photosensor (2V, 2R). The first photosensor is arranged with the light emitting diode at a forward scattering angle and the second photosensor with the light emitting diode at a backward spread angle. According to the invention, the light-emitting diode again has a first and a second LED chip for light in the first and second wavelength ranges.

机译：本发明涉及一种具有根据散射光原理操作的检测单元（10）的散射光烟雾检测器（100）。它具有用于照射要检测的粒子的第一和第二发光二极管（1V，1R）以及对光谱敏感的普通光电传感器（2），这两个发光二极管均具有透射轴（SA），而光电传感器具有接收轴（EA）。 LED和光电传感器都布置并彼此对齐，以使所有轴都位于同一平面（W）中。第一发光二极管与光传感器以正向散射角（±V）布置，第二发光二极管与光传感器以向后散射角（±R）布置。根据本发明，两个发光二极管均具有第一和第二LED芯片（3、4），第一和第二LED芯片（3、4）分别发射第一和第二波长范围不同的光的第一和第二光束（BL，RO）。由此。替代地，烟雾探测器仅具有一个发光二极管（1）以及第一和第二光电传感器（2V，2R）。第一光电传感器被布置成具有向前散射角的发光二极管，第二光电传感器被布置成具有向后散射角的发光二极管。根据本发明，发光二极管又具有用于第一和第二波长范围内的光的第一和第二LED芯片。

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公开/公告号EP3029648A1

专利类型
公开/公告日2016-06-08

原文格式PDF
申请/专利权人 SIEMENS SCHWEIZ AG;
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申请/专利号EP20140200082
发明设计人 WALKER STEFAN;
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申请日2014-12-23
分类号G08B17/107;G01N21/53;
国家 EP
入库时间 2022-08-21 14:48:20

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