公开(公告)号：EP1983336A1

公开(公告)日：2008-10-22

申请号：EP07707744.4

申请日：2007-01-30

申请人： Mitsui Mining and Smelting Co., Ltd.

发明人： YAMAGISHI, Kiyoshi ,  NAKAMURA, Toshimi ,  YANAGI, Kiyotaka ,  KUBOTA, Akiko

IPC分类号： G01N25/18

CPC分类号： G01N33/2829 ,  G01N27/185

摘要： There is provided by the invention a fluid identification device capable of being mounted in single device constitution on a tank irrespective of the type of the tank. The fluid identification device of the invention is characterized in that a fluid detection part which is equipped with a temperature detector for fluid detection and a heating element disposed in the vicinity of the temperature detector for fluid detection and which is disposed on the identification target fluid side, a fluid detection circuit connected to the fluid detection part and an identification operation part which performs identification of an identification target fluid based on the output of the fluid detection circuit are contained in an container.

摘要翻译： 本发明提供了一种流体识别装置，其能够以罐装置的单一装置结构安装在罐上，而与罐的类型无关。 本发明的流体识别装置的特征在于，配备有用于流体检测的温度检测器和设置在用于流体检测的温度检测器附近的加热元件的流体检测部件，其设置在识别目标流体侧 连接到流体检测部分的流体检测电路和基于流体检测电路的输出执行识别目标流体的识别的识别操作部分被容纳在容器中。

公开(公告)号：EP1660878A1

公开(公告)日：2006-05-31

申请号：EP04782407.3

申请日：2004-08-27

申请人： Honeywell International, Inc.

发明人： BONNE, Ulrich ,  KUBISIAK, David

IPC分类号： G01N27/18 ,  G01N25/00 ,  G01N25/18 ,  G01F1/68 ,  G01F1/696 ,  G01F1/698

CPC分类号： G01N27/185

摘要： Temperature compensation methods for physical property sensors are disclosed herein, based on a simple bridge circuit. An imbalance of the bridge circuit can be driven to a zero value, while a supply voltage thereof is simultaneously driven to a level required to bring the heating element to the temperature rise above ambient temperature that optimally compensates for a number of temperature-dependent effects. The heating element can be configured as a thin-film heating material. The resulting total temperature dependence of the measuring system, which includes the heating element, the bridge-circuit with amplifier and the fluid to be measured, can be reduced to a level at which the need for additional digital temperature compensation circuitry and its associated costs may be reduced.

公开(公告)号：EP1329713A1

公开(公告)日：2003-07-23

申请号：EP03002676.9

申请日：1998-12-03

申请人： Honeywell Inc.

发明人： Kubisiak, David ,  Bonne, Ulrich

IPC分类号： G01N25/18 ,  G01N25/00 ,  G01N27/18 ,  G01F1/708 ,  G01F1/698 ,  G01F1/699 ,  G01P5/12 ,  G01P5/18 ,  G01N25/20

CPC分类号： G01F1/6845 ,  G01F1/6842 ,  G01F1/698 ,  G01F1/7084 ,  G01F1/712 ,  G01F5/00 ,  G01N25/18 ,  G01N27/18 ,  G01N27/185

摘要： A common frequency generator (400) provides a time-varying input signal to a heater element (402), a first sensor element (404) and a second sensor element (406) via Wheatstone Bridge circuits (408,410 and 412), respectively. Differential amplifiers (416,418 and 420) provide a heater output signal (422), a first sensor output signal (424) and a second sensor output signal (426), respectively. The output signals are representative of the resistance, and thus the temperature, of the corresponding element. A processor (430) receives the time-varying input signal provided by the frequency generator (400), along with the heater output signal (422), the first sensor output signal (424) and the second sensor output signal (426). Processor (430) determines selected phase lags between these signals using an FFT and/or cross-correlation analysis.

公开(公告)号：EP1329712A1

公开(公告)日：2003-07-23

申请号：EP03002675.1

申请日：1998-12-03

申请人： Honeywell Inc.

发明人： Kubisiak, David ,  Bonne, Ulrich

IPC分类号： G01N25/18 ,  G01N25/00 ,  G01N27/18 ,  G01F1/708 ,  G01F1/698 ,  G01F1/699 ,  G01P5/12 ,  G01P5/18 ,  G01N25/20

CPC分类号： G01F1/6845 ,  G01F1/6842 ,  G01F1/698 ,  G01F1/7084 ,  G01F1/712 ,  G01F5/00 ,  G01N25/18 ,  G01N27/18 ,  G01N27/185

摘要： A method for determining a property of a fluid of interest comprises the following steps:

energizing a heater (402) and a first sensor (404) with at least two timevarying input signals, each having a different frequency, wherein the heater (402) and the first sensor (404) are thermally coupled to the fluid of interest and have a resistance that change with temperature;
sensing the resistance change of the first sensor;
determining a lag between selected ones of the at least two time-varying input signals and the corresponding resistance change of the first sensor; and
determining a first ideal input frequency that would produce a phase lag between an ideal time-varying input signal and the resistance change of the first sensor that substantially equals a first calibrated phase lag value.

摘要翻译： 加热器（702）被包括在一个惠斯登电桥（704），其中包括在加热器相对的腿的电压相关电阻器（706），所有这些通过由频率发生器提供随时间变化的输入信号（712）控制（700 ）。 差分放大器（708）感测的任何不平衡，并提供必要的功率经由功率输入信号（710），以平衡的桥梁。 电阻，因此，加热器的温度被强制跟踪电压相关电阻器（706），即电阻 随时间变化的输入信号。 因此，相奠定加热器的温度和随时间变化的输入信号被强制为0之间。 处理器（740）确定的地雷电力输入信号相对于参考或校准函数中相应的相移和涉及相移的热导率。

公开(公告)号：EP1227319A2

公开(公告)日：2002-07-31

申请号：EP02250592.9

申请日：2002-01-29

申请人： LECO CORPORATION

发明人： Willis, Peter Markel

IPC分类号： G01N27/18

CPC分类号： G01N27/185

摘要： A control circuit for a thermal conductivity cell employs a constant resistance bridge drive circuit (30) which automatically adjusts to maintain a measurement filament (16) at a constant resistance. A reference filament (14) provides a differential signal representative of the concentration of an analyte. A detection circuit (50-70) utilizes digital/analog methods to significantly reduce l/f noise of an amplifier providing at least a seven fold improvement in signal-to-noise ratio. The circuit also includes a bridge nulling method (80) adjusted under microprocessor (70) control to eliminate manual offset adjustments. A reference protection circuit (90) is coupled to the reference filament (14) and prevents the voltage applied to the filaments from overheating the filaments in the event there is a breach in the gas flow path.

摘要翻译： 用于热导池的控制电路采用恒定电阻桥驱动电路（30），其自动bestimmt保持在恒定的电阻的测量灯丝（16）。 参考灯丝（14）提供差分代表分析物的浓度的信号。 检测电路（50-70）利用数字/模拟方法，以显着降低的放大器提供至少在信噪比7个改善升/ f噪声。 因此，该电路包括：微处理器（70）的控制下调整到消除人工偏置调整的桥调零方法（80）。 参考保护电路（90）耦合到参考灯丝（14），并防止在事件过热长丝没有在气体流路违反施加到长丝上的电压。

公开(公告)号：EP2981815B1

公开(公告)日：2017-04-19

申请号：EP14724624.3

申请日：2014-03-11

申请人： Chemec GmbH

发明人： BRANDAU, Eckard

IPC分类号： G01N27/18 ,  G01K15/00

CPC分类号： G01N27/185 ,  G01K15/007 ,  G01N25/18 ,  G01N33/0027

公开(公告)号：EP3132260A1

公开(公告)日：2017-02-22

申请号：EP15716043.3

申请日：2015-04-13

申请人： Siemens Aktiengesellschaft

发明人： GELLERT, Udo

IPC分类号： G01N30/66 ,  G01N27/18 ,  G01N30/62 ,  G01F1/68

CPC分类号： G01N30/66 ,  B01L3/5027 ,  B01L2300/0663 ,  B01L2300/1827 ,  G01F1/7084 ,  G01N27/18 ,  G01N27/185 ,  G01N30/62 ,  G01N2030/025 ,  G01N2030/621 ,  G01N2030/625

摘要： The invention relates to a thermal conductivity detector (5) comprising: - a measurement channel (6), - an electrically heatable heating filament (7) extending longitudinally along the center of the measurement channel (6) so that a fluid (23) passing through the measurement channel (6) flows around the filament (7), - evaluation means (8) for detecting electrical resistance changes of the heating filament (7) and providing an output (9) representative of the presence and amount of various fluid components passing the heating filament (7), and - a bypass channel (13) for bypassing the measurement channel (6), said bypass channel (13) having a lower fluidic resistance than the measurement channel (6). To improve the detection capability, the thermal conductivity detector (5) further comprises: - a flow sensor (24) for measuring the flow of the fluid in the bypass channel (13) and providing an output (37) indicative of the measured flow, and - correcting means (38) for correcting the output (9) of the evaluation means (8) using the output (37) of the flow sensor (24 ).

摘要翻译： 本发明涉及一种热导率检测器（5），其包括测量通道（6），设置在其中的可电加热丝（7），使得通过测量通道（6）的流体（23）围绕灯丝（7）流动 ）和用于检测加热丝（7）的电阻变化的评估装置（8），并提供表示通过加热丝（7）的各种流体成分的存在和量的输出（9）。 为了提高检测能力，特别是当用于具有包装或PLOT色谱柱的气相色谱仪时，热导检测器（5）还包括用于绕过测量通道（6）的永久旁路通道（13），旁路通道（13）具有 比测量通道（6）更低的流体阻力。 优选地，提供流量传感器（24），用于感测旁路通道（13）中的流体的流动，并用感测的流量校正评估装置（8）的输出（9）。

公开(公告)号：EP0724151A1

公开(公告)日：1996-07-31

申请号：EP96300221.7

申请日：1996-01-11

申请人： YAMATAKE-HONEYWELL CO. LTD.

发明人： Muto, Hiroyuki, c/o Kamata Factory ,  Kajio, Yasuhiro, c/o Kamata Factory ,  Kamiunten, Shoji, c/o Fujisawa Factory ,  Nagata, Mitsuhiko, c/o Fujisawa Factory

IPC分类号： G01N27/18

CPC分类号： G01N27/185

摘要： A thermal conductivity measuring device includes a diaphragm portion, a thermal conductivity detector, a temperature sensor, a control section, and a thermal conductivity calculating section. The diaphragm portion is formed on a base. The thermal conductivity detector is formed in the diaphragm portion to perform conduction of heat to/from a sample gas. The temperature sensor is disposed on the base to be near the thermal conductivity detector so as to measure the ambient temperature around the base. The temperature sensor is thermally insulated from the thermal conductivity detector. The control section controls the amount of energy supplied to the thermal conductivity detector such that the temperature difference between the ambient temperature measured by the temperature sensor and the heating temperature of the thermal conductivity detector becomes a constant value. The thermal conductivity calculating section calculates the thermal conductivity of the sample gas on the basis of the amount of energy supplied to the thermal conductivity detector while the temperature difference is kept at the constant value by the control section.

摘要翻译： 热导率测量装置包括隔膜部分，热导率检测器，温度传感器，控制部分和热导率计算部分。 隔膜部分形成在基座上。 热导率检测器形成在隔膜部分中以对样品气体进行热传导。 温度传感器设置在基座上以靠近热导率检测器，以便测量围绕基座的环境温度。 温度传感器与热导检测器隔热。 控制部控制供给热导率检测器的能量的量，使得由温度传感器测量的环境温度与热导检测器的加热温度之间的温差成为恒定值。 热导率计算部根据通过控制部将温差保持为恒定值的供给到热导率检测器的能量的量来计算样品气体的热导率。

公开(公告)号：EP0549947A1

公开(公告)日：1993-07-07

申请号：EP92121334.4

申请日：1992-12-15

申请人： SHARP KABUSHIKI KAISHA

发明人： Andoh, Yuuzi

IPC分类号： G01R17/10 ,  G01N25/64

CPC分类号： G01N27/185 ,  G01N33/02 ,  H05B6/6458

摘要： The invention provides a circuit for detecting humidity in which occurrence of a temperature drift can be inhibited by a simple means which therefore is able to detect humidity precisely without regard to the temperature of the atmosphere. The humidity detection circuit includes a bridge circuit (1) containing temperature elements (Rs, Rr). The bridge circuit (1) is connected with a series of a third resistance (R3), a current controlling element (5) and a power supply (Eo) in this order, while a series of fourth and fifth resistances (R4, R5) is arranged in parallel with the series of the third resistance (R3) and the bridge circuit (1). In addition a junction between the fourth and the fifth resistances (R4, R5) an another junction between the third resistance (R3) and the bridge circuit (1) are connected separately to a voltage comparing circuit (4), of which the output in turn is the input for the current controlling element (5). In this arrangement, a control section is provided to detect the potential of the junction between the bridge circuit (1) and the third resistance (R3). The humidity detection circuit, based upon the detected potential, changes the resistance value of the fifth resistane (R5) to an optimum level at which the temperature drift does not occur.

摘要翻译： 本发明提供了一种用于检测湿度的电路，其中可以通过简单的手段来抑制温度漂移的发生，因此能够精确地检测湿度而不考虑大气温度。 湿度检测电路包括含有温度元件（Rs，Rr）的桥接电路（1）。 桥式电路（1）依次与一系列第三电阻（R3），电流控制元件（5）和电源（Eo）连接，而一系列第四和第五电阻（R4，R5） 与第三电阻（R3）和桥接电路（1）的一系列并联布置。 此外，第四电阻（R，R5，R5）之间的第四电阻（R3）和桥式电路（1）之间的另一结点与电压比较电路（4）分开连接， 转动是当前控制元件（5）的输入。 在这种布置中，提供控制部分以检测桥接电路（1）和第三电阻（R3）之间的接合点的电位。 湿度检测电路基于检测到的电位，将第五电阻（R5）的电阻值改变到不发生温度漂移的最佳电平。

公开(公告)号：EP0382414A2

公开(公告)日：1990-08-16

申请号：EP90301086.6

申请日：1990-02-02

申请人： ALCAN INTERNATIONAL LIMITED

发明人： Hachey, Raynald ,  Lamarre, Daniel ,  Marcotte, Jacques

IPC分类号： G01N27/18

CPC分类号： G01N27/185

摘要： New methods and new katharometer apparatus for the measurement of thermal conductivity of gases are provided. The apparatus employs a single katharometer element (10), that is maintained at a constant operating temperature. If the element (10) temperature changes, changing its resistance, owing to passage of a gas with a different thermal characteristic, an amplifier (32) changes the power supplied to the katharometer element (10) to restore it to the predetermined temperature, the amplifier (32) output being a measure of the gas thermal conductivity. Operation of the apparatus is therefore independent of the resistance/temperature characteristic of the element (10) and is relatively insensitive to ambient temperature changes. Preferably a thermistor is employed as the katharometer element (10). Various operating circuits for the katharometer are disclosed. The invention also provides new operating methods for katharometers to reduce the sensitivity of measurement to thermal leakage and temperture changes to the katharometer body, and to permit the comparison of voltages across a series connected katharometer element (10) and a resistor (18) at a common reference point.

摘要翻译： 提供了用于测量气体导热性的新方法和新的测湿仪。 该装置采用保持在恒定工作温度的单个测湿仪元件（10）。 如果元件（10）温度变化，则由于具有不同热特性的气体通过而改变其电阻，放大器（32）改变提供给测微计元件（10）的功率，将其恢复到预定温度， 放大器（32）输出是气体热导率的量度。 因此，该装置的操作与元件（10）的电阻/温度特性无关，并且对环境温度变化相对不敏感。 优选地，使用热敏电阻作为测湿仪元件（10）。 公开了用于测湿计的各种操作电路。 本发明还提供了用于测速仪的新的操作方法，以降低测量对热泄漏和温度计体的温度变化的灵敏度，并且允许比较串联连接的测湿器元件（10）和电阻器（18）上的电压 共同参考点。