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    • 1. 发明授权
    • Pneumatic infrared gas detector
    • 气动红外线气体检测仪
    • US5739538A
    • 1998-04-14
    • US689073
    • 1996-07-30
    • Satoru SakaueMutsumi NagumoMichihiko Tsuruoka
    • Satoru SakaueMutsumi NagumoMichihiko Tsuruoka
    • G01N21/61G01N21/37
    • G01N21/37
    • A pneumatic infrared gas detector includes a pair of expansion chambers and a pair of pressure chambers, each of which is connected at one end thereof to the corresponding expansion chamber. Each of the pressure chambers is divided by a diaphragm into a first chamber connected to a corresponding expansion chamber, and a second chamber, such that the first chamber of one of the pair of pressure chambers is connected to the second chamber of the other of the pressure chambers through a first communication path, and such that the second chamber of the above-indicated one of the pressure chambers is connected to the first chamber of the other of the pressure chambers through a second communication path. A pair of pneumatic pressure detecting elements are provided each of which includes an electret film having one surface on which an electrode is formed, and an electrode plate disposed in opposed relationship with the electret film. The electret film is formed on a first side of a corresponding one of the diaphragms in each pressure chamber, and the electrode plate is supported and fixed at a position that is opposed to a second side of the corresponding diaphragm.
    • 气动红外气体检测器包括一对膨胀室和一对压力室,每个压力室的一端连接到相应的膨胀室。 每个压力室由隔膜分隔成连接到相应的膨胀室的第一室和第二室,使得一对压力室中的一个的第一室连接到另一个的另一个的第二室 压力室通过第一连通路径,并且使得上述一个压力室中的第二腔室通过第二连通路径连接到另一个压力室的第一腔室。 提供一对气压检测元件,每个气动检测元件包括其中形成有电极的一个表面的驻极体膜以及与驻极体膜相对设置的电极板。 驻极体膜形成在每个压力室中的对应的一个膜片的第一侧上,并且电极板被支撑并固定在与相应隔膜的第二侧相对的位置。
    • 3. 发明授权
    • Vibration type transducer
    • 振动型传感器
    • US4961345A
    • 1990-10-09
    • US129521
    • 1987-12-07
    • Michihiko TsuruokaWataru NakagawaMasashi MachidaNaohiro Kounosu
    • Michihiko TsuruokaWataru NakagawaMasashi MachidaNaohiro Kounosu
    • G01L9/00G01N9/00
    • G01L9/0022G01L9/0016G01N9/002
    • The apparatus of the present invention detects the resonant frequency of a vibratory member in contact with the fluid in order to determine the density or pressure of the fluid. The vibratory member is disposed in a housing to form a cavity with no flow communication between the side of the vibratory member facing into the cavity and the other side of the vibratory member. The vibratory member is vibrated by an annular piezoelectric device which may be attached to one or both sides of the vibratory member. An amplifier and feedback circuit regulate the frequency of oscillation of the piezoelectric device to that of the resonant frequency. The piezoelectric device may be comprised of several separate sections or several sections with partial interruptions in the piezoelectric material. Instead of the vibratory member and the piezoelectric transducer combination, the vibratory member may be constructed from a single fixed piezoelectric device with another piezoelectric disc mounted thereon. In this configuration one of the devices is used to mechanically excite the other and through a feedback circuit establish the resonant frequency of the two laminated piezoelectric devices.
    • 本发明的装置检测与流体接触的振动构件的共振频率,以便确定流体的密度或压力。 振动构件设置在壳体中以在振动构件的面向腔体的一侧与振动构件的另一侧之间形成没有流动连通的空腔。 振动构件通过环形压电装置振动,环形压电装置可附接到振动构件的一侧或两侧。 放大器和反馈电路将压电器件的振荡频率调节到谐振频率的振荡频率。 压电装置可以由压电材料中的几个分开的部分或几个具有部分中断的部分组成。 代替振动构件和压电换能器组合,振动构件可以由安装有另一个压电盘的单个固定压电装置构成。 在该配置中,其中一个装置用于机械地激励另一个装置,并且通过反馈电路建立两个层压压电装置的谐振频率。
    • 4. 发明授权
    • Karman vortex flowmeter
    • 卡曼涡流流量计
    • US4584883A
    • 1986-04-29
    • US439900
    • 1982-11-08
    • Noriomi MiyoshiMichihiko TsuruokaMutsumi Nagumo
    • Noriomi MiyoshiMichihiko TsuruokaMutsumi Nagumo
    • F02D41/18F02M69/48G01F1/32
    • G01F1/3218F02D41/185F02M69/48G01F1/3254
    • A Karman vortex flowmeter for deriving the velocity or quantity of fluid flow is comprised of an upstream pillar for producing Karman's vortex streets or paths that has a substantially isosceles triangle cross section, a downstream pillar for producing Karman's vortex paths that has a substantially isosceles trapezoidal cross section, a vibration chamber, and a vibrator member supported in the vibration chamber in a state of mass equilibrium relative to a revolving shaft passing through its center of gravity such that it can vibrate torsionally about the revolving shaft. The base of the upstream pillar is substantially equal to the base of the downstream pillar, and the pillars are positioned so that the bases are parallel to each other and perpendicular to the direction of the fluid flow. The vibrator member is preferably provided with a pair of taut bands supporting the vibrator member which form the revolving shaft and a frame which supports the bands. The taut bands may be pressed by a spring member to ensure uniform tension in the face of temperature changes, and may be damped with suitable elastic material. The flowmeter is provided with a photoelectric detector to detect the vibration of the vibrator member as it vibrates in response to pressure variations attributable to the Karman streets produced by the pillars. The detector preferably includes an integrator and comparator which cooperate to derive only effective frequency components.
    • 用于导出流体流动速度或数量的卡曼涡流流量计包括用于产生卡门涡街或具有基本上等腰三角形截面的路径的上游支柱,用于产生具有基本上等腰梯形十字形的卡门涡街的下游支柱 振动室和振动室,振动室中以相对于穿过其重心的旋转轴质量平衡的状态支撑在振动室中,使得其能够围绕旋转轴扭转振动。 上游支柱的基部基本上等于下游支柱的基部,并且支柱被定位成使得基部彼此平行且垂直于流体流动的方向。 振动器构件优选地设置有一对支撑形成旋转轴的振动器构件的拉紧带和支撑带的框架。 张紧带可以被弹簧构件按压以确保面对温度变化时的均匀张力,并且可以用合适的弹性材料来阻尼。 该流量计设置有光电检测器,用于检测振动器构件响应于由支柱产生的卡曼街道的压力变化而振动时的振动。 该检测器优选地包括一个积分器和比较器,其合作以仅导出有效频率分量。
    • 5. 发明授权
    • Karman's vortex flow metering apparatus
    • 卡曼的涡流计量装置
    • US4470310A
    • 1984-09-11
    • US388670
    • 1982-06-15
    • Michihiko TsuruokaNoriomi Miyoshi
    • Michihiko TsuruokaNoriomi Miyoshi
    • G01F1/32
    • G01F1/3254
    • In the particular embodiments of the invention described herein, a Karman's vortex flow metering apparatus has an oscillating plate magnetically held at the vertex of a triangular chamber located outside a flow line. Within the flow line a Karman's vortex generator is mounted transverse to the flow direction and has vortex generating slits extending along its length. Pressure detecting slits located at the end of the generator near the detector communicate through short pressure transmitting lines with opposite sides of the chamber. The resulting oscillation of the plate is detected optically or magnetically to provide signals corresponding to the flow rate.
    • 在本文所述的本发明的特定实施例中,卡曼的涡流计量装置具有磁性地保持在位于流动线外侧的三角形室的顶点的振动板。 在流线内,卡曼的涡流发生器横向于流动方向安装并具有沿其长度延伸的涡流产生狭缝。 位于发生器靠近检测器的端部的压力检测狭缝通过具有腔室相对侧的短压力传输线连通。 通过光学或磁性检测板的产生的振荡,以提供对应于流速的信号。
    • 9. 发明授权
    • Vibration type transducer
    • 振动型传感器
    • US4991153A
    • 1991-02-05
    • US326431
    • 1989-03-20
    • Michihiko TsuruokaWataru NakagamaNaohiro Kounosu
    • Michihiko TsuruokaWataru NakagamaNaohiro Kounosu
    • G01L9/00G01N9/00
    • G01L9/0022G01N9/002
    • The apparatus of the present invention detects the resonant frequency of a vibratory member in contact with a fluid. The detection of the resonant frequency enables the device to be used to detect the density of a fluid which it is in contact with and thereby calculate the flow rate of the fluid. The vibratory member is mounted in a housing in such a way that the chambers on either side of the vibratory member have equal volumes. The fluid enters the device through a conduit and then divides into two equal tubes on either side of an extension of a vibratory member extending down these tubes. The apparatus for measuring the resonant frequency of the vibratory member is mounted on the vibratory member and is comprised of a piezoelectric element coupled to a driver circuit in a feedback loop.
    • 本发明的装置检测与流体接触的振动构件的共振频率。 谐振频率的检测使得该装置能够用于检测与其接触的流体的密度,从而计算流体的流速。 振动构件以这样的方式安装在壳体中,使得振动构件的任一侧上的腔体具有相等的体积。 流体通过管道进入装置,然后在沿着这些管延伸的振动构件的延伸部的两侧分成两个相等的管。 用于测量振动构件的谐振频率的装置安装在振动构件上,并且由耦合到反馈回路中的驱动器电路的压电元件组成。