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    • 4. 发明授权
    • Membrane type optical transducers particularly useful as optical microphones
    • 膜式光学传感器特别适用于光学麦克风
    • US06906807B2
    • 2005-06-14
    • US10102715
    • 2002-03-22
    • Alexander ParitskyAlexander Kots
    • Alexander ParitskyAlexander Kots
    • H04R23/00G01B11/24
    • H04R23/008
    • An optical transducer includes a housing containing a light source and a light detector laterally spaced from the light source; and a deformable membrane mounted over the light source and light detector such that an inner surface of the membrane reflects light from the light source to the light detector to produce, from the light detector, an output electrical signal modulated in accordance with the deformations of the membrane. The inner surface of the membrane has a small central region of high light reflectivity to maximize the output electrical signal produced by the deformations of the membrane, and a large outer region of lower light reflectivity to minimize noise in the output electrical signal produced by multi-reflection of light from the light source to the light detector. The membrane is preferably formed in its outer region with circular corrugations coaxial with each other and with the central region of high light reflectivity to increase the deformability of the central region.
    • 光学换能器包括:壳体,其包含光源和与光源横向间隔开的光检测器; 以及安装在所述光源和光检测器上的可变形膜,使得所述膜的内表面将来自所述光源的光反射到所述光检测器,以从所述光检测器产生根据所述光检测器的变形调制的输出电信号 膜。 膜的内表面具有高的光反射率的小的中心区域,以最大化由膜的变形产生的输出电信号,以及较大的较低的光反射率的外部区域,以最小化由多层膜产生的输出电信号中的噪声, 将光从光源反射到光检测器。 膜优选地在其外部区域中形成具有彼此同轴的圆形波纹和具有高光反射率的中心区域,以增加中心区域的可变形性。
    • 10. 发明授权
    • Flow velocity measurement method and apparatus, including applications thereof for measuring heat flow, and wind velocity and/or direction generation
    • 流速测量方法和装置,包括用于测量热流的应用以及风速和/或方向的产生
    • US07036367B2
    • 2006-05-02
    • US10844397
    • 2004-05-13
    • Gady Golan
    • Gady Golan
    • G01F1/68
    • G01F1/692G01F1/69G01K17/16G01P5/12G01P13/02
    • A method and apparatus for measuring the flow velocity of a flowing fluid includes a positive temperature coefficient thermistor to be immersing within the flowing fluid in order to provide a measurement of the rate of heat dissipation of the thermistor produced by the flowing fluid, and thereby a measurement the flow velocity of the fluid. The positive temperature coefficient thermistor used has a resistance which increases sharply at the predetermined temperature at which electrical current is maintained in the thermistor such that the thermistor is self-controlled to maintain substantially the predetermined temperature, whereby the electrical current drawn by the thermistor is a measurement of the thermal load on the thermistor resulting from the thermal heat dissipation therefrom by the flowing fluid, and thereby a measurement of the flow velocity of the fluid. Various embodiments of the invention are described, including those for measuring heat flow in a centralized heating or air conditioning system, wind velocity and direction, and flow velocity in a wind tunnel.
    • 用于测量流动流体的流速的方法和装置包括浸入流动流体中的正温度系数热敏电阻,以提供由流动的流体产生的热敏电阻的散热速率的测量值,从而 测量流体的流速。 所使用的正温度系数热敏电阻具有在热敏电阻中保持电流的预定温度下急剧增加的电阻,使得热敏电阻被自我控制以保持基本上预定的温度,从而由热敏电阻拉出的电流为 通过流动的流体测量热敏电阻产生的热负荷,从而测量流体的流速。 描述了本发明的各种实施例,包括用于测量集中式加热或空调系统中的热流,风速和方向以及风洞中的流速的实施例。