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    • 2. 发明申请
    • GAS SENSING APPARATUS AND SENSORS THEREFOR
    • 气体感测装置及其传感器
    • WO1995004926A1
    • 1995-02-16
    • PCT/GB1994001727
    • 1994-08-05
    • CAPTEUR SENSORS & ANALYSERS LTD.McGEEHIN, PeterMOSELEY, Patrick, TimothyWILLIAMS, David, Edward
    • CAPTEUR SENSORS & ANALYSERS LTD.
    • G01N27/12
    • G01N27/12
    • A gas sensor comprises a sensing element in the form of a porous, thick, semiconducting metal oxide layer (38). The sensor (20) is suspended by fine wires (24, 26) in a housing (22), which is part of an apparatus that includes a processing circuit for measuring sensor resistance and a circuit for controlling the working temperature of the sensor. These circuits, and characteristic of the sensor, are such that: baseline sensor resistance is repeatable to less than +/- 5 %; the output signals of all sensors of a given type bear a common simple mathematical relationship to target gas concentration; the resistance/gas concentration characteristic is repeatable to less than +/- 15 %; and operating temperature is consistent within +/- 30 % for a sensor population having the same zero resistance. The processing circuitry is adapted for a wide variety of different sensor types.
    • 气体传感器包括多孔厚的半导体金属氧化物层(38)形式的感测元件。 传感器(20)由细线(24,26)悬挂在壳体(22)中,壳体(22)是包括用于测量传感器电阻的处理电路和用于控制传感器的工作温度的电路的装置的一部分。 这些电路和传感器的特性使得:基线传感器电阻可重复小于+/- 5%; 给定类型的所有传感器的输出信号与目标气体浓度具有常见的简单数学关系; 电阻/气体浓度特性可重复小于+/- 15%; 对于具有相同零电阻的传感器群,工作温度在+/- 30%内是一致的。 处理电路适用于各种不同的传感器类型。
    • 5. 发明申请
    • ANALYSIS OF LIQUID SOLUTIONS
    • 液体溶液分析
    • WO1995004271A1
    • 1995-02-09
    • PCT/GB1994001690
    • 1994-08-01
    • CAPTEUR SENSORS & ANALYSERS LTD.WILLIAMS, David, EdwardMcGEEHIN, Peter
    • CAPTEUR SENSORS & ANALYSERS LTD.
    • G01N27/28
    • G01N27/283
    • Low concentrations of target species in liquid solutions are analysed using a simple, disposable, electrode sensor element (1) in the form of a flat strip (10) of insulating substrate material with one or more flat electrodes (12) printed on it. The electrode is overlaid with an insulating layer (14) which as a through aperture (16) exposing an active surface (18) of the working electrode (12). The area of the active surface is precisely known. In use, the electrode is vibrated in a plane normal to the plane of the substrate. In preferred arrangements this vibration is intermittent. The sensor, vibrated at a known frequency, produces a stable and repeatable current signal representing concentration of the solution. Any reagents necessary are incorporated in the disposable sensor element as supplied, in a further coating (20) which dissolves when the sensor element is immersed in the solution. Such a coating can also be used to prevent contamination of the active surface (18) before use. The sensor elements may be made in a form in which the electrode working surfaces are exposed only when the element is broken off a larger body, which may be a continuous tape or strip.
    • 使用简单的一次性电极传感器元件(1)来分析液体溶液中的低浓度目标物质,该电极传感器元件(1)是具有一个或多个平坦电极(12)印刷在其上的绝缘基底材料的扁平带(10)的形式。 电极覆盖有作为暴露工作电极(12)的活性表面(18)的通孔(16)的绝缘层(14)。 活性表面的面积是已知的。 在使用中,电极在与基板的平面垂直的平面中振动。 在优选的布置中,这种振动是间歇性的。 以已知频率振动的传感器产生表示溶液浓度的稳定且可重复的电流信号。 所需的任何试剂,在所提供的一次性传感器元件中,在传感器元件浸入溶液中时溶解的另外的涂层(20)中。 这种涂层也可用于防止使用前活性表面(18)的污染。 传感器元件可以制成其中电极工作表面仅在元件从更大的主体断开时可以被暴露的形式,其可以是连续的带或带。
    • 6. 发明申请
    • ELECTRO-ANALYSIS OF LIQUIDS AND SENSING ELEMENTS FOR USE THEREIN
    • 液体和感应元件的电解分析
    • WO1992021961A1
    • 1992-12-10
    • PCT/GB1992001017
    • 1992-06-05
    • CAPTEUR SENSORS & ANALYSERS LTD.WILLIAMS, David, EdwardPLANER, George, Victor
    • CAPTEUR SENSORS & ANALYSERS LTD.
    • G01N27/38
    • G01N27/38
    • A sensing element, for use in determining the presence and/or concentration of a species in a solution, comprises a flat insulating substrate (10) having at least one thin metallic electrode (16) deposited on it and overlaid with an insulating layer (20). The electrode (16) and insulating layer (20) bridge a weakening groove (12) formed in the substrate. Immediately before use, the element is broken along the groove to expose a cross-sectional surface (24) of the element, and thus a cross-sectional working surface (26) of the electrode. The thickness (T) of the element is comparable to or less than the concentration boundary layer thickness of the solution. This exposed working surface is the only part of the electrode in contact with the solution. In use, the element can be vibrated so as to improve its sensitivity.
    • 用于确定溶液中物质的存在和/或浓度的感测元件包括平坦绝缘基底(10),其具有沉积在其上并与绝缘层(20)重叠的至少一个薄金属电极(16) )。 电极(16)和绝缘层(20)桥接形成在基板中的弱化槽(12)。 在使用之前,元件沿着凹槽断裂以暴露元件的横截面(24),从而暴露电极的横截面工作表面(26)。 元件的厚度(T)与溶液的浓度边界层厚度相当或小于溶液的浓度边界层厚度。 该暴露的工作表面是与溶液接触的电极的唯一部分。 在使用中,元件可以被振动以提高其灵敏度。
    • 9. 发明申请
    • MONITORING OF MULTIPLE-ELECTRODE GAS SENSORS
    • 多电极气体传感器的监测
    • WO1995004927A1
    • 1995-02-16
    • PCT/GB1994001728
    • 1994-08-05
    • CAPTEUR SENSORS & ANALYSERS LTD.WILLIAMS, David, Edward
    • CAPTEUR SENSORS & ANALYSERS LTD.
    • G01N27/12
    • G01N33/0031G01N27/12G01N33/007
    • A gas sensor, suitable for use under non-steady state conditions, has a gas-sensitive resistor (18) with pairs (N, W) of electrodes which either have different spacings between the electrodes of a pair, or comprise a pair at the active surface and further pairs buried in the resistor at different distances from the active surface. The sensor can be used in place of a sensor array, and is coupled to means for processing the resistance signals to detect and/or measure at least one target gas. The sensor is self-diagnostic, and factors such as relative humidity and ambient oxygen, that can otherwise affect the readings, can be compensated for without the aid of additional sensors for that purpose. An operating line or surface ((a), (b)) is defined for the expected behaviour of the sensor, and the resistance signals from the electrode pairs are processed so as to give information which is then related to the operating line or surface, so as to reveal, in terms of error indications, any malfunction of the sensor and/or the presence of specific constituents of the gas mixture.
    • 一种气体传感器,适用于非稳态条件下使用的气敏电阻器(18)具有对(N,W)的电极,它们在一对电极之间具有不同的间隔,或者在一对电极 有源表面和另外的对埋在电阻器中的距离有源表面不同的距离。 可以使用传感器来代替传感器阵列,并且耦合到用于处理电阻信号以检测和/或测量至少一个目标气体的装置。 该传感器是自我诊断的,并且否则会影响读数的因素,例如相对湿度和环境氧气可以补偿,而无需为此目的提供额外的传感器。 为了传感器的预期行为定义了操作线或表面((a),(b)),并处理来自电极对的电阻信号,以便给出与操作线或表面有关的信息, 以便在误差指示方面显示传感器的任何故障和/或气体混合物的特定成分的存在。