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    • 4. 发明授权
    • Load cell
    • 称重传感器
    • US3837222A
    • 1974-09-24
    • US28077272
    • 1972-08-15
    • SANDS MEASUREMENT CORP
    • RASKIN S
    • G01G3/14G01G5/00G01G7/02G01G9/00G01L1/04G01L1/22
    • G01G5/003G01G3/1402G01G3/1404G01G7/02G01G9/005G01L1/044G01L1/2231
    • A load cell of the beam type having a planar operator member having a pair of parallel longitudinal slots defining a central beam member and a pair of parallel bearing members spaced outwardly of the beam member, the outer ends of the bearing members and of the beam member being integral with one another, the operator member having a pair of laterally outwardly extending support members positionable on a horizontal laterally spaced surface of a support block, the load or force to be measured being applied to the central portion of the beam member which is provided with strain measuring means such as strain gages at locations of flexure of the beam member. The support block may have a pair of transversely extending narrow edges underlying the central portions of the bearing members for preventing torsional movement of the bearing members as the load is applied to the beam member. A modified form of the load cell has an operator member whose support members extend parallel to and longitudinally of the bearing members and are secured thereto by transverse connector members, the support members being secured at opposite ends to horizontal support surfaces of a support block, the connector members and the bearing members engaging transverse narrow edges of the support block whereby the support members may be prestresssed upwardly at their midpoints.
    • 梁型的测力传感器具有平面操作器构件,该平面操作器构件具有限定中心梁构件的一对平行纵向狭槽和与梁构件向外间隔开的一对平行的轴承构件,轴承构件的外端和梁构件 操作者构件具有一对侧向向外延伸的支撑构件,其可定位在支撑块的水平横向间隔开的表面上,待测量的载荷或力被施加到所述梁构件的中心部分 具有应变测量装置,例如在梁构件的挠曲位置处的应变计。 支撑块可以具有在轴承构件的中心部分下方的一对横向延伸的窄边缘,用于当负载施加到梁构件时用于防止轴承构件的扭转运动。
    • 5. 发明授权
    • Fluid characteristic sensing device
    • 流体特性传感装置
    • US3638487A
    • 1972-02-01
    • US3638487D
    • 1969-11-14
    • SANDS MEASUREMENT CORP
    • RASKIN SEYMOUR H
    • G01F1/64G01N11/08G01F1/06
    • G01N11/08G01F1/64
    • A device for sensing a characteristic, such as velocity or viscosity, of a fluid flowing through a flow conductor, the device having a housing connectable to the flow conductor and a tubular strain member having a longitudinal passage of the same internal diameter as the flow conductor disposed within the housing and constituting a section of the flow conductor, the strain member and the housing providing an annular chamber about the strain member, the fluid pressure of a fluid flowing through the flow conductor being communicated to the annular chamber by ports in the strain member or by a bypass conductor, and a plurality of strain gages spaced longitudinally of and bonded to the strain member and connected in a Wheatstone bridge circuit, the resistances of the strain gages at an upstream portion of the strain member varying as tension forces imposed on the upstream portion of the strain member and the resistances of strain gages at a downstream portion of the strain member varying as the compression forces imposed on the downstream portion by fluid flowing therethrough. The Wheatstone bridge provides an output voltage or signal which varies in accordance with the velocity of flow of the fluid through the strain member if the velocity of flow may vary and thus acts as a flow meter, or which varies in accordance with the viscosity of the fluid flowing through the strain member if the velocity of the fluid is constant and its viscosity may vary. The sensing device may also include means for sensing the temperature of the fluid to provide an output signal to a computer to which the output of the Wheatstone bridge is also transmitted so that the computer may provide an output signal, which is indicative of a certain characteristic of the fluid flowing therethrough, to a controlled device, such as a transducer, electrically operable valve, recorder and the like.
    • 一种用于感测流过流动导体的流体的速度或粘度的特性的装置,该装置具有可连接到流动导体的壳体和具有与流体导体相同内径的纵向通道的管状应变件 设置在壳体内并构成流动导体的一部分,应变构件和壳体围绕应变构件提供环形室,流过导流体的流体的流体压力通过应变中的端口连通到环形室 以及多个应变片,其纵向间隔并连接到应变构件并连接在惠斯登电桥电路中,应变片的上游部分处的应变片的电阻随着施加的张力而变化 应变构件的上游部分和应变片的下游部分处的应变计的电阻变化 通过流体流过其而施加在下游部分的压缩力。 惠斯通电桥提供的输出电压或信号根据流体通过应变件的流速而变化,如果流速可能变化,并因此用作流量计,或者根据流量计的粘度而变化 如果流体的速度恒定并且其粘度可​​能变化,则流过应变构件的流体。 感测装置还可以包括用于感测流体的温度以向输出信号提供输出信号的装置,惠斯通电桥的输出也被传送到计算机,使得计算机可以提供输出信号,其表示某一特性 流过其中的流体传送到受控装置,例如换能器,电动可操作的阀,记录器等。