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    • 2. 发明申请
    • PRESSURE SENSOR
    • 压力传感器
    • WO2009006944A1
    • 2009-01-15
    • PCT/EP2007/057193
    • 2007-07-12
    • ABB Research LtdKRAMER, AxelKASSUBEK, FrankBOHNERT, KlausBRÄNDLE, Hubert
    • KRAMER, AxelKASSUBEK, FrankBOHNERT, KlausBRÄNDLE, Hubert
    • G01L11/02G01L1/24
    • G01L11/02G01L1/24
    • A pressure sensor (16) with at least one pressure sensing element (3, 4), the pressure induced changes in the optical properties of which are evaluated by illuminat ion (2) with at least one light source (1) is described. The pressure sensor is characterised in that the pressure sensor (16) comprises at least two semiconductor-based pressure sensing elements (3, 4) located in individual pressure chambers (5, 6), which sensing elements (3, 4) are located essentially adjacent to each other and which sensing elements (3, 4) are irradiated with the same light source (1), wherein the light transmitted through the sensing elements (3, 4) is detected using at least two corresponding detectors (7, 8), and wherein the differential pressure in the two pressure chambers (5, 6) is evaluated based on the output of these detectors (7, 8).
    • 描述了具有至少一个压力感测元件(3,4)的压力传感器(16),通过具有至少一个光源(1)的照明(2)评估其光学特性的压力感应变化。 压力传感器的特征在于,压力传感器(16)包括位于各个压力室(5,6)中的至少两个基于半导体的压力感测元件(3,4),其中感测元件(3,4)基本上位于 使用相同的光源(1)照射哪些感测元件(3,4),其中通过至少两个相应的检测器(7,8)检测透过感测元件(3,4)的光, ,并且其中基于这些检测器(7,8)的输出来评估两个压力室(5,6)中的压差。
    • 3. 发明申请
    • METHOD FOR DETECTING A NO-FLOW SITUATION IN A VORTEX OR SWIRL FLOW METER
    • 用于检测VORTEX或SWIRL流量计中的无流动状态的方法
    • WO2009068090A1
    • 2009-06-04
    • PCT/EP2007/062936
    • 2007-11-28
    • ABB RESEARCH LTDANDENNA, AndreaUKIL, AbhisekKASSUBEK, Frank
    • ANDENNA, AndreaUKIL, AbhisekKASSUBEK, Frank
    • G01F1/32
    • G01F1/3209G01F1/3254
    • A no-flow condition is detected and indicated by spectral analysis of the output signal of a vortex or swirl flow meter. In a normal, positive flow rate condition large magnitude components are, possibly apart from known interferers like the 50Hz component caused by the electrical power supply, clustered around the frequency of a maximum magnitude component related to the flow rate. In a no-flow condition the components of large magnitude are mostly caused by some motor driving a pump or the like and consist of a basic frequency, e.g., 40Hz, as caused by the motor, and its harmonics, e.g., 80Hz and 120Hz. If a set of large magnitude components comprises a component with a frequency larger than the frequency of a maximum magnitude component multiplied by 1.15 or smaller than the same divided by 1.15 this may already indicate a no-flow condition. Depending on the application, more stringent criteria like the presence of frequency quotients close to small integers like 2, 3 and their inverses or quotients can be employed.
    • 通过涡流或涡流流量计的输出信号的光谱分析来检测和指示无流动状态。 在正常的正流量条件下,大幅度分量可能远离已知的干扰源,如由电源引起的50Hz分量,聚集在与流量相关的最大幅度分量的频率周围。 在无流动状态下,大量的部件主要由一些电动机驱动泵等引起,并且由电动机引起的基本频率(例如40Hz)及其谐波(例如80Hz和120Hz)构成。 如果一组大幅度分量包括频率大于最大幅度分量的频率乘以1.15或小于除以1.15的频率的分量,则这可能已经表示无流动状况。 根据应用,可以采用更严格的标准,例如接近小的整数(如2,3)及其反转或商的频率商的存在。