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    • 31. 发明公开
    • Chemiresistor sensor system compensated for temperature and aging effects
    • Chemiresistor传感器系统补偿了温度和老化的影响
    • EP2012115A2
    • 2009-01-07
    • EP08159174.5
    • 2008-06-27
    • Therm-O-Disc Incorporated
    • Starling, Jared
    • G01N27/12
    • G01N27/122
    • A chemiresistor sensor system compensated for temperature and aging effects is disclosed and includes a sensing element exposed to an atmosphere of an ambient environment to be monitored for the presence and/or concentration of a flammable vapor and a temperature compensation element which is isolated from the atmosphere of the ambient environment. The sensing element and the temperature compensation element are electrically connected in series and have similar performance in response to temperature changes and temperature cycling. The output of the chemiresistor sensor system, which is the voltage drop across the sensing element, remains unchanged despite the changes in resistance of the sensing element in response to temperature changes. Therefore, the chemiresistor sensor system can more accurately and consistently detect the presence of flammable vapor in environments subject to temperature changes and/or over long periods of time.
    • 公开了补偿温度和老化效应的化学电阻传感器系统,并且包括暴露于周围环境的大气的传感元件以监测易燃蒸气和与大气隔离的温度补偿元件的存在和/或浓度 的周围环境。 感测元件和温度补偿元件串联电连接并且响应于温度变化和温度循环而具有相似的性能。 尽管传感元件的电阻随温度变化而变化,但是传感元件两端的电压降即化学电阻传感器系统的输出保持不变。 因此,化学电阻传感器系统可以在温度变化和/或长时间的环境中更准确和始终如一地检测易燃蒸气的存在。
    • 36. 发明公开
    • Electronic chemical trace detector
    • Elektronischer Detektorfürchemische Spuren
    • EP1790979A1
    • 2007-05-30
    • EP05077694.7
    • 2005-11-24
    • Consultatie Implementatie Technisch Beheer B.V.
    • Bos, Albert
    • G01N27/18
    • G01N27/122G01N27/126G01N27/18Y10T436/10
    • A hotplate chemical trace detector comprising a heatable conducting plate with a heater element having a predetermined temperature-power characteristic. A balancing circuit comprises an adjustable resistor for tuning the heater element to a predefined resistor value. A processor is provided for adjusting the adjustable resistor so as to provide a stabilized temperature in said heatable conducting plate and a detection circuit is provided for detecting a change of resistance in the heatable conducting plate in accordance with the presence of a chemical trace reacting in the presence of the conducting plate. According to the invention a test circuit is provided for measuring a dissipated power in the heater element and for calculating a real temperature from the dissipated power in the heater element based on the predetermined temperature-power characteristic.
    • 一种热板化学痕迹检测器,包括具有预定温度 - 功率特性的具有加热器元件的可加热导电板。 平衡电路包括用于将加热器元件调谐到预定电阻器值的可调电阻器。 提供一种用于调节可调电阻器以便在所述可加热导电板中提供稳定温度的处理器,并且提供检测电路,用于根据在可加热导电板中存在的化学痕迹的反应来检测可加热导电板中的电阻变化 存在导电板。 根据本发明,提供了一种测试电路,用于测量加热器元件中的耗散功率,并且用于基于预定的温度 - 功率特性从加热器元件中的耗散功率计算实际温度。