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    • 5. 发明授权
    • Method for detecting fires
    • 检测火灾的方法
    • US06856252B2
    • 2005-02-15
    • US10332254
    • 2002-02-05
    • Anton PfeffersederBernd SiberAndreas HenselUlrich Oppelt
    • Anton PfeffersederBernd SiberAndreas HenselUlrich Oppelt
    • G08B29/18G08B29/20G08B17/10
    • G08B29/188G08B29/20
    • A method for detecting fires is proposed that serves to avoid false alarms, by providing that an alarm threshold is determined as a function of signal parameters derived from at least one sensor signal. False alarms are thus advantageously precluded. This is still further improved by setting up an alarm interval for which the alarm threshold must be exceeded, if an alarm is to be indicated. The alarm interval can also be determined adaptively as a function of the signal parameters. An upper threshold and a lower threshold are provided for the alarm interval and the alarm threshold, respectively, in order to build in a certain safety, so that the alarm threshold and alarm interval will not assume values that put a function of the fire detector at risk. It is also possible to use more sensor signals, in which case signal parameters can be generated by linking the sensor signals. As the fire detector, a scattered light smoke detector is preferably used, which is equipped with a labyrinth and a measurement chamber.
    • 提出了一种用于检测火灾的方法,其用于通过提供根据从至少一个传感器信号导出的信号参数的函数来确定报警阈值来避免误报。 因此有利地排除了虚假警报。 如果要指示报警,则通过设置必须超过报警阈值的报警间隔进一步改进。 报警间隔也可以根据信号参数自适应地确定。 分别为报警间隔和报警阈值提供上限阈值和下限阈值,以建立一定的安全性,使报警阈值和报警时间间隔不会置于将火灾探测器的功能置于 风险。 还可以使用更多的传感器信号,在这种情况下,可以通过连接传感器信号来产生信号参数。 作为火灾检测器,优选使用散射光检测器,其配备有迷宫式和测量室。
    • 10. 发明授权
    • Optoelectronic gas sensor based on optodes
    • 基于光电的光电气体传感器
    • US06704470B1
    • 2004-03-09
    • US09529155
    • 2000-06-22
    • Joachim SchneiderAnton PfeffersederAndreas HenselUlrich Oppelt
    • Joachim SchneiderAnton PfeffersederAndreas HenselUlrich Oppelt
    • G02B626
    • G01N21/7703G01N2021/7753
    • An optoelectronic gas sensor based on optodes, where multiple separate photosensitive elements and an opto-transmitter located centrally between them are integrated into or onto a semiconductor substrate is characterized in that the photosensitive elements lie in one plane in the substrate, and together with a lateral emission area of the opto-transmitter emitting light laterally, they are covered by sections of the optode material whose thickness and refractive index are selected so that light emitted laterally from the emission area is guided to the photosensitive elements by total reflection in the optode material in each transmission branch. Such a chip-shaped gas sensor based on optodes can be implemented in a very small design, e.g., in an area of 2×2 mm2 and a thickness of 250 &mgr;m.
    • 基于optodes的光电子气体传感器,其中多个单独的感光元件和位于它们之间的中心的光发射器集成到半导体衬底中或其上,其特征在于感光元件位于衬底中的一个平面中,并且与侧面 光发射器的光发射区域横向发射,它们由选择其厚度和折射率的光栅材料的部分覆盖,使得从发射区域侧向发射的光通过光栅材料中的全反射被引导到光敏元件 每个传输分支。 这种基于光电极的片状气体传感器可以非常小的设计来实现,例如在2x2mm 2的面积和250μm的厚度上。