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    • 5. 发明授权
    • Semi-constant power circuit for use with a thermal radiation source
    • 用于热辐射源的半恒定电源电路
    • US06023069A
    • 2000-02-08
    • US959750
    • 1997-10-28
    • Gregory SteinthalAndrian Kouznetsov
    • Gregory SteinthalAndrian Kouznetsov
    • G01J3/10H01K1/02
    • G01J3/108
    • A power circuit for use with a resistive thermal radiation source in which the power delivered to the resistive thermal radiation source will remain constant within a preselected deviation over a fixed period of time as the source resistance of the source varies between an initial source resistance and a second source resistance at the operating temperature. The power circuit is designed to maintain constant power within a preselected deviation by using the resistance of the resistive thermal radiation source to calculate a preselected resistance used in the power circuit according to the following equation: ##EQU1## wherein .DELTA.P=P.sub.si -P.sub.s ; P.sub.si =the initial power on the resistive thermal radiation source; P.sub.s =the power on the resistive thermal radiation source when the source resistance is equal to the second source resistance; K.sub.1 =RO/R.sub.si ; R0=the preselected resistance; R.sub.si =the initial source resistance; K.sub.2 =R.sub.s /R.sub.si ; and R.sub.s =the second source resistance.
    • 用于电阻式热辐射源的电源电路,其中输送到电阻式热辐射源的功率将在固定时间段内保持恒定在预定偏差范围内,因为源极的源极电阻在初始源电阻和 第二源电阻在工作温度。 电源电路被设计成通过使用电阻热辐射源的电阻在预选偏差内保持恒定的功率,以根据以下等式计算在电源电路中使用的预选电阻:其中DELTA P = Psi-Ps; Psi =电阻热辐射源的初始功率; Ps =源电阻等于第二源电阻时电阻热辐射源的功率; K1 = RO / Rsi; R0 =预选电阻; Rsi =初始源电阻; K2 = Rs / Rsi; Rs =第二源电阻。
    • 8. 发明申请
    • Apparatus, systems and methods for detecting and transmitting sensory data over a computer network
    • 用于在计算机网络上检测和传送感觉数据的装置,系统和方法
    • US20050061056A1
    • 2005-03-24
    • US10976770
    • 2004-11-01
    • Steven SunshineGregory SteinthalChristopher BoehrRobert Nakayama
    • Steven SunshineGregory SteinthalChristopher BoehrRobert Nakayama
    • G01N29/02G01N33/00G01N33/18G01N33/24G01N7/00
    • G01N33/0032G01N29/022G01N33/0009G01N33/0073G01N2291/0217G01N2291/0256G01N2291/0423G01N2291/0426G01N2291/106
    • A vapor sensing device that is sufficiently small and lightweight to be handheld, and also modular so as to allow the device to be conveniently adapted for use in sensing the presence and concentration of a wide variety of specified vapors. The device provides these benefits using a sensor module that incorporates a sample chamber and a plurality of sensors located on a chip releasably carried within or adjacent to the sample chamber. Optionally, the sensor module can be configured to be releasably plugged into a receptacle formed in the device. Vapors are directed to pass through the sample chamber, whereupon the sensors provide a distinct combination of electrical signals in response to each. The sensors of the sensor module can take the form of chemically sensitive resistors having resistances that vary according to the identity and concentration of an adjacent vapor. These chemically sensitive resistors can each be connected in series with a reference resistor, between a reference voltage and ground, such that an analog signal is established for each chemically sensitive resistor. The resulting analog signals are supplied to an analog-to-digital converter, to produce corresponding digital signals. These digital signals are appropriately analyzed for vapor identification. The device can then subsequently transmit the digital signals over a computer network, such as the Internet, for analysis at a remote location.
    • 一种气体感测装置,其足够小且重量轻以便手持式,并且也是模块化的,以便允许装置方便地适用于感测多种特定蒸气的存在和集中。 该装置使用包含样品室的传感器模块和位于可拆卸地承载在样品室内或附近的芯片上的多个传感器来提供这些益处。 可选地,传感器模块可以被配置为可释放地插入形成在装置中的容器中。 蒸气被引导通过样品室,于是传感器响应于每个传感器提供电信号的明显组合。 传感器模块的传感器可以具有化学敏感电阻器的形式,其具有根据相邻蒸汽的特性和浓度而变化的电阻。 这些化学敏感电阻可以分别与参考电阻串联在一个参考电压和地之间,从而为每个化学敏感电阻建立一个模拟信号。 所得到的模拟信号被提供给模数转换器,以产生相应的数字信号。 适当地分析这些数字信号以进行蒸气识别。 然后,设备可以随后通过计算机网络(例如因特网)发送数字信号,以在远程位置进行分析。