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19 条记录 (耗时 0.027 秒)

    Flow rate measurement method and ultrasonic flow meter
    1.
    发明授权
    Flow rate measurement method and ultrasonic flow meter 失效
    流量测量方法和超声波流量计

    公开(公告)号：US6065351A

    公开(公告)日：2000-05-23

    申请号：US817442

    申请日：1997-04-18

    申请人： Yukio Nagaoka ,  Motoyuki Nawa ,  Kenzo Ohji

    发明人： Yukio Nagaoka ,  Motoyuki Nawa ,  Kenzo Ohji

    IPC分类号： G01F1/66

    CPC分类号： G01F1/66 ,  G01F1/667

    摘要： An ultrasonic flow meter includes a conduit through which a fluid flows, an ultrasonic generator, a receiver for receiving ultrasonic waves on the upstream or downstream side of the generator, a time counter for determining the propagation time of the ultrasonic wave, a flow rate calculator for calculating the flow rate from the propagation time, and a timing controller. The timing controller sets a delay time corresponding to the flow rate measured from the relation between a flow rate which is set in advance, and the measured delay time. After the passage of this delay time the ultrasonic wave is emitted from the generator on the basis of a driving signal outputted from a trigger section and the flow rate is determined. Since the flow rate is thus measured with the delay time suitable for the flow rate, the flow rate is correctly determined, and power consumption is reduced.

    摘要翻译： PCT No.PCT / JP95 / 02142 Sec。 371日期1997年4月18日 102（e）日期1997年4月18日PCT提交1995年10月19日PCT公布。 WO96 / 12933 PCT出版物 日期1996年2月5日超声波流量计包括流体流过的导管，超声波发生器，用于在发电机的上游侧或下游侧接收超声波的接收器，用于确定超声波的传播时间的时间计数器 ，用于从传播时间计算流量的流量计算器和定时控制器。 定时控制器根据预先设定的流量与测量的延迟时间之间的关系，设定与流量对应的延迟时间。 经过该延迟时间之后，根据从触发部输出的驱动信号，从发生器发出超声波，确定流量。 由于这样测量具有适合于流量的延迟时间的流量，因此正确地确定了流量，并且降低了功耗。

    Automatic weight detecting device
    9.
    发明授权
    Automatic weight detecting device 失效
    自动重量检测装置

    公开(公告)号：US4875533A

    公开(公告)日：1989-10-24

    申请号：US216497

    申请日：1988-07-08

    申请人： Makoto Mihara ,  Masanobu Inoue ,  Kenzo Ohji ,  Shuji Itou

    发明人： Makoto Mihara ,  Masanobu Inoue ,  Kenzo Ohji ,  Shuji Itou

    IPC分类号： G01G3/08 ,  G01G7/06 ,  G01G19/52 ,  G01G19/56 ,  G01G21/23 ,  G01G21/30 ,  G01G23/02 ,  H05B6/80

    CPC分类号： H05B6/6411 ,  G01G19/56 ,  G01G21/23 ,  G01G7/06 ,  H05B6/6464

    摘要： An automatic weight detecting device is provided with a platform on which an object to be measured is placed, a supporting shaft for supporting the platform is rotatable and smoothly movable in the supporting direction. A driving motor rotates the supporting shaft, and an elastic member supports the supporting shaft. A load detecting device converts the load of the object, transmitted in the supporting direction of the rotatable supporting shaft through the elastic member into a given electrically physical amount and a weight detecting circuit integrates to obtain the average of the electrically physical amount while the shaft rotates, so that the weight of the object is detected.

    摘要翻译： 一种自动重量检测装置，其具有放置有被测定物的平台，支撑所述平台的支撑轴，其能够在支撑方向上旋转并平稳移动;驱动机构，其使所述支撑轴旋转;弹性部件 用于支撑所述支撑轴的载荷检测装置，其将通过所述弹性构件在所述可旋转支撑轴的支撑方向上传递的物体的载荷转换成给定的电学物理量;以及重量检测电路， 旋转时的电物理量的平均值，从而检测物体的重量。

    Surface acoustic wave resonator
    10.
    发明授权
    Surface acoustic wave resonator 失效
    表面声波谐振器

    公开(公告)号：US4223286A

    公开(公告)日：1980-09-16

    申请号：US940510

    申请日：1978-09-05

    申请人： Shusuke Ono ,  Kenzo Ohji ,  Osamu Yamazaki ,  Kiyotaka Wasa

    发明人： Shusuke Ono ,  Kenzo Ohji ,  Osamu Yamazaki ,  Kiyotaka Wasa

    IPC分类号： H03H3/08 ,  H03H9/02 ,  H03H9/145 ,  H03H9/20 ,  H01L41/10 ,  H01L41/18 ,  H03H9/32

    CPC分类号： H03H9/02834 ,  H03H9/02574 ,  H03H9/02779 ,  H03H9/14541

    摘要： A surface acoustic wave resonator includes a base plate made of glass and a layer of piezoelectric material which has a plurality of strips extending parallel to each other for forming a reflector. A surface acoustic wave excited from a transducer reflects at each of the strips. The reflectance of such surface acoustic wave is improved by the arrangement of the strips and the thickness of the layer. On the other hand, the temperature coefficient of the resonance frequency is also improved by the arrangement of the strips and the thickness of the layer, and by the amount of the alkali metal oxide contained in the base plate, and further by the thickness of silicon oxide film laminated on the surface of the base plate.

    摘要翻译： 表面声波谐振器包括由玻璃制成的基板和具有彼此平行延伸以形成反射器的多个条带的压电材料层。 从换能器激发的表面声波在每个条上反射。 这种表面声波的反射率通过条带的布置和层的厚度得到改善。 另一方面，共振频率的温度系数也通过条的排列和层的厚度以及基板中所含的碱金属氧化物的量以及硅的厚度而得到改善 氧化膜层叠在基板的表面上。