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    • 51. 发明授权
    • Clamp-on type ultrasonic flow meter and a temperature and pressure
compensation method therein
    • 夹式超声波流量计及其中的温度和压力补偿方法
    • US5856622A
    • 1999-01-05
    • US616907
    • 1996-03-19
    • Toshihiro YamamotoSatoru NakamuraAkio Miyamoto
    • Toshihiro YamamotoSatoru NakamuraAkio Miyamoto
    • G01F1/66G01N29/32G01F1/00
    • G01F1/66G01F1/667G01F1/668G01N29/323G01N29/326G01N2291/011G01N2291/0222G01N2291/02836G01N2291/102
    • A ratio C of sonic speed in a fluid to a sinusoidal value at an incident angle of sonic waves from the pipe to the fluid is designated as a basic unknown quantity. A distance D between the opposite inner wall surfaces of the pipe, a thickness t.sub.p of the pipe wall, a projection length t.sub.w of sound rays in the oblique wedge projected onto a plane orthogonal to the center axis of the pipe, and sonic speed C.sub.w, C.sub.p in the oblique wedge and the pipe wall are used as given values. A propagation time .tau. of ultrasonic waves through the oblique wedge and the pipe wall is treated as a variable. The value C is determined in course of calculating a projection length L of sound rays between the ultrasonic transducers projected onto the center axis of the pipe by a gradual approximation, which is determined as a given value. Then, a refraction angle .theta..sub.f of sonic waves from the pipe wall to the fluid and a propagation time .tau. of ultrasonic waves through the oblique wedge of the ultrasonic transducer are determined based on the value C. These values and a propagation time of ultrasonic waves between the ultrasonic transducers obtained by a measurement are applied to a basic equation to derive a flow velocity of the fluid in the pipe at temperature and pressure under a service condition.
    • 将流体中的声速与从管道到流体的声波的入射角的正弦值的比率C指定为基本未知量。 管的相对的内壁面之间的距离D,管壁的厚度tp,投影在与管的中心轴正交的平面上的倾斜楔中的声线的突出长度tw以及声速Cw, 将斜楔和管壁中的Cp用作给定值。 通过斜楔和管壁的超声波的传播时间τ被视为变量。 在通过逐渐近似计算投射到管道的中心轴上的超声波换能器之间的声线的投影长度L的过程中确定值C,其被确定为给定值。 然后,基于值C确定从管壁到流体的声波的折射角θf和超声波换能器的斜楔的超声波的传播时间τ。这些值和超声波的传播时间 在通过测量获得的超声波换能器之间施加基本方程式以在使用条件下的温度和压力下导出管道中的流体的流速。
    • 58. 再颁专利
    • Lens barrier opening/closing device of a movable lens barrel
    • 可移动透镜镜筒的透镜屏障打开/关闭装置
    • USRE39752E1
    • 2007-07-31
    • US11059702
    • 2005-02-17
    • Hiroshi NomuraNobuaki AokiYoshihiro YamazakiSatoru Nakamura
    • Hiroshi NomuraNobuaki AokiYoshihiro YamazakiSatoru Nakamura
    • G03B17/00G03B17/04
    • G02B7/10
    • A lens barrier opening/closing device of a movable lens barrel includes a barrier blade which is driven to open and close a photographic aperture; a barrier drive ring driven to rotate about an optical axis; a first biasing device which biases the barrier drive ring in a rotational direction; a rotational barrel which rotates about the optical axis; a receiving surface formed on the barrier drive ring to extend parallel to the optical axis; and a transmission surface, formed on the rotational barrel, extending parallel to the optical axis. The receiving surface and the transmission surface are engaged with each other to rotate the barrier drive ring together with the rotational barrel about the optical axis in a direction against a biasing force of the first biasing device when the movable lens barrel moves from either the photographing position to the accommodation position or vise versa.
    • 可移动透镜镜筒的透镜屏障打开/关闭装置包括被驱动以打开和关闭照相孔的屏障刮板; 驱动围绕光轴旋转的阻挡驱动环; 第一偏置装置,其沿阻力传动环沿旋转方向偏置; 围绕光轴旋转的旋转筒; 所述接收表面形成在所述阻挡驱动环上以平行于所述光轴延伸; 以及形成在旋转筒上的传播表面,其平行于光轴延伸。 接收表面和传输表面彼此接合,以便当可移动透镜镜筒从拍摄位置移动时,抵抗第一偏压装置的偏压力的方向使阻挡驱动环与旋转筒一起围绕光轴旋转 到住宿位置或反之亦然。