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    • 91. 发明授权
    • Gas alarm
    • 气体报警器
    • US5969623A
    • 1999-10-19
    • US998086
    • 1997-12-24
    • Byron FleuryAndrew Stanton
    • Byron FleuryAndrew Stanton
    • G01N33/00G01N33/49G08B21/12G08B21/14G08B21/16G08B17/10
    • G08B21/16G01N33/004G01N33/0063G08B21/12G08B21/14
    • A gas detector is disclosed which includes a CO sensor and a processor. The CO sensor senses an environmental CO concentration and provides a variable electrical output in response. The processor receives digitized samples of the sensor's electrical output and computes, with each measurement sample, a COHb level of a hypothetical person exposed to the CO concentration sensed. The computation involves determining an equilibrium COHb level for each measurement sample, which is compared with a previously computed COHb level associated with previously measured samples. The previously computed COHb level is updated based on the comparison. When the computed COHb level is above a predetermined danger threshold, the processor preferably causes an audible and visual alarm to be activated to alert any persons present. The gas detector can further include a CH.sub.4 sensor coupled to the processor for independently sensing CH.sub.4 levels such that an alarm is activated when the CH.sub.4 levels are above a predefined threshold. A hydrophobic zeolite filter is disposed on the sensor elements of one or both of the CO and CH.sub.4 sensors to prevent erroneous readings.
    • 公开了一种气体检测器,其包括CO传感器和处理器。 CO传感器检测环境CO浓度并提供响应的可变电输出。 处理器接收传感器电气输出的数字化样本,并与每个测量样本一起计算暴露于感测的CO浓度的假设人员的COHb水平。 计算涉及确定每个测量样本的平衡COHb水平,其与先前计算的与先前测量样本相关联的COHb水平进行比较。 基于比较更新先前计算的COHb级别。 当所计算的COHb水平高于预定危险阈值时,处理器优选地引起声音和视觉报警器被激活以警告存在的任何人。 气体检测器还可以包括耦合到处理器的CH4传感器,用于独立地感测CH4电平,使得当CH4电平高于预定阈值时,报警被激活。 疏水沸石过滤器设置在CO和CH4传感器中的一个或两个的传感器元件上,以防止错误的读数。
    • 93. 发明授权
    • Apparatus for detecting organic materials in water
    • 用于检测水中有机物质的装置
    • US3774185A
    • 1973-11-20
    • US3774185D
    • 1972-02-04
    • DOW CHEMICAL CO
    • PARTH W
    • G08B21/12G08B21/00
    • G08B21/12Y10T137/7306
    • A detector device for determining the presence of organic materials in water streams, such as chemical sewers, as a result of leakage or spillage. The device comprises an upright elongated electrically insulating tube through which material from the stream is pumped. At intervals flow through the tube stops, the lighter organic material rising to the top and displacing water downwardly. A pair of spaced apart metal rings near the top of the tube act as plates of an electrical capacitor. As the level of organic material in the tube reaches the location of the rings, the dielectric change changes the electrical value of the capacitor. This change in value is detected and utilized to trigger an alarm. The position of the rings along the tube is adjustable. Using the capacitor as part of the tuned circuit of an oscillator is one means to develop an alarm signal when the oscillator is detuned when the dielectric changes near the rings.
    • 用于确定由于泄漏或溢出而导致的水流中的有机物质(例如化学污水管)的存在的检测器装置。 该装置包括直立的细长电绝缘管,通过该管从泵流出物料。 每隔一段时间流经管道停止,较轻的有机材料上升到顶部并向下移动水。 在管顶部附近的一对间隔开的金属环用作电容器的板。 随着管中有机材料的水平达到环的位置,介电变化会改变电容器的电气值。 该值的变化被检测并用于触发报警。 环沿管的位置是可调节的。 使用电容器作为振荡器调谐电路的一部分,当振荡器在环路附近变化时,振荡器失谐,就会产生一个报警信号。