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    • 4. 发明授权
    • Temperature-compensated extensometer
    • 温度补偿引伸计
    • US4522066A
    • 1985-06-11
    • US498042
    • 1983-05-25
    • Walter P. KistlerMartin D. Chinn
    • Walter P. KistlerMartin D. Chinn
    • G01B7/16G01B7/18
    • G01B7/16
    • An extensometer having two spaced-apart mounting bases adapted to be mounted on a load-bearing structure with its axis of sensitivity intersecting the axis along which load-induced strains are generated at 45.degree.. The extensometer includes a pair of parallel links connecting the mounting bases through respective flexure hinges. In one embodiment, one of the links is also connected to one of the bases through an intermediate flexure hinge so that the link deforms responsive to relative movement applied between the bases along the axis of sensitivity. A strain gauge mounted on this link measures the magnitude of the deformation. In a second embodiment, a strain-instrumented measurement beam extends between the two links so that it deforms responsive to pivotal movement of the links as the mounting bases move in opposite directions along the axis of sensitivity. This embodiment of extensometer may be mounted on the load-bearing structure through three or more mounting points. In order to facilitate mounting of the extensometer on a structure without pre-straining the extensometer, a rigid plate may be connected to the extensometer through a plurality of pins, each of which extends from the plate through the extensometer at each of the mounting points. The pins terminate in a point and they are biased against the structure by a threaded fastener extending from the plate, through the extensometer, and into the structure.
    • 具有两个间隔开的安装基座的引伸计,其适于安装在承载结构上,其感测轴与45°处产生负载引起的应变的轴相交。 引伸计包括一对平行的连接件,通过相应的弯曲铰链连接安装基座。 在一个实施例中,一个连杆还通过中间弯曲铰链连接到一个基座,使得连杆响应于沿着灵敏轴线在基座之间施加的相对运动而变形。 安装在该连杆上的应变计测量变形的大小。 在第二实施例中,应变仪器测量光束在两个连杆之间延伸,使得当安装基座沿着敏感轴线沿相反方向移动时,响应于连杆的枢转运动而变形。 引伸计的这个实施例可以通过三个或多个安装点安装在承载结构上。 为了便于将引伸计安装在结构上而不预拉伸引伸计,刚性板可以通过多个销连接到引伸计上,每个销在每个安装点处从板延伸穿过引伸计。 销终止于一点,并且它们通过从板延伸穿过引伸计并进入结构的螺纹紧固件偏压在结构上。
    • 5. 发明授权
    • Train gage measurement circuit for high temperature applications using
high value completion resistors
    • 使用高值完成电阻的高温应用的火车量规测量电路
    • US4417477A
    • 1983-11-29
    • US259563
    • 1981-05-11
    • Ronald I. Poff
    • Ronald I. Poff
    • G01B7/16G01B7/18
    • G01B7/18
    • A Wheatstone bridge circuit for a strain gage designed to eliminate the zero offset due to heated cables occurring when the active elements of the bridge circuit are elevated to high temperatures. The bridge circuit comprises an active, a dummy and two completion resistors and is distinguished from conventional bridge circuits in that the resistance of the completion resistors substantially exceeds the value of any other resistors in the bridge circuit. The cables are used to connect the active and dummy resistors which are at the elevated temperatures to the completion resistors which are at room temperature. Heat induced resistance changes in the cables normally produce the zero offset because the cables form a part of the bridge circuit and are heated unevenly; however, the high value of completion resistors incorporated in the present invention tend to nullify the resistance changes in the cables and thereby eliminate the zero offset.
    • 一种用于应变计的惠斯登电桥电路,设计用于消除当桥接电路的有源元件升高到高温时由于加热电缆产生的零点偏移。 桥接电路包括有源,虚拟和两个完成电阻器,并且与传统的桥接电路不同,因为完成电阻器的电阻基本上超过了桥接电路中任何其它电阻器的值。 电缆用于将处于升高温度的有源和虚拟电阻连接到室温下的完成电阻。 由于电缆形成桥接电路的一部分并且不均匀地加热,电缆中的热诱导电阻变化通常产生零偏移; 然而,本发明中并入的完成电阻器的高值倾向于消除电缆中的电阻变化,从而消除零点偏移。
    • 6. 发明授权
    • Improvements in or relating to strain transducers
    • 应变传感器的改进或涉及应变传感器
    • US4058005A
    • 1977-11-15
    • US721592
    • 1976-09-08
    • John David Barnett
    • John David Barnett
    • G01B7/16G01B7/18
    • G01B7/18
    • Strain measurement apparatus comprises a rigid support arranged to be secured against the surface of a structure. One or more resiliently deformable carrier elements provided with strain gauges mounted in said support are urged against the surface by the securing of the support to engage the surface at regions spaced from the region of securing of the support and thereby the strains at said regions of engagement are translated directly into deformation of the carrier element or elements to produce measurement signals from the strain gauges. The engagement pressure is transmitted to the elements through resilient means that limit its magnitude while allowing the apparatus to be firmly secured to the surface.
    • 应变测量装置包括被布置成抵靠结构表面固定的刚性支撑件。 设置有安装在所述支撑件中的应变仪的一个或多个可弹性变形的载体元件通过固定支撑件被推靠在表面上,以在与支撑件的固定区域间隔开的区域处接合表面,从而在所述接合区域处的应变 直接转化为载体元件的变形,以产生来自应变计的测量信号。 接合压力通过限制其大小的弹性装置传递到元件,同时允许装置牢固地固定到表面。
    • 7. 发明授权
    • Dual-mount electromechanical deflection sensor
    • 双安装机电偏转传感器
    • US3832898A
    • 1974-09-03
    • US40018473
    • 1973-09-24
    • RANDOLPH G
    • RANDOLPH G
    • G01L1/18G01B7/18
    • G01L1/18
    • A dual-mount deflection sensor including an elongated carrier for supporting a pair of piezoresistive elements. The carrier is unitary, and includes a pair of end parts (for securing it to an external body) and an elongated slender stem joining such parts. The stem has one portion with an outer surface of revolution for receiving the piezoresistive elements, and another portion with a noncircular, flattened, elongated transverse cross section for providing a preferential bending plane in the carrier. A modified carrier contains transverse slots in the second-mentioned portion of the stem for minimizing the effect on the piezoresistive elements of axially carried forces in the carrier.
    • 一种双安装偏转传感器,包括用于支撑一对压阻元件的细长载体。 载体是一体的,并且包括一对端部(用于将其固定到外部主体上)和连接这些部件的细长杆。 杆具有一个具有用于接收压阻元件的外表面的部分,以及具有非圆形,扁平的细长横截面的另一部分,用于在载体中提供优先弯曲平面。 改进的载体在杆的第二提到部分中包含横向槽,用于最小化对载体中轴向承载力的压阻元件的影响。
    • 8. 发明授权
    • Device for machining an accurately dimensioned annular groove around a circular measuring area for measuring intrinsic stresses in structural components of machines and apparatus
    • 用于在机械和设备的结构部件中测量内部应力的圆形测量区域上加工精确尺寸的环形槽的装置
    • US3803905A
    • 1974-04-16
    • US23672172
    • 1972-03-21
    • WOLF HBOHM WSTUCKER E
    • BOHM WSTUCKER EWOLF H
    • B23C3/28G01B7/16G01L1/00G01L5/00G01N19/00G01B7/18
    • G01B7/18G01L5/0047
    • There is included in apparatus for checking a structural component for intrinsic stresses by attaching strain gage means to a surface measuring area of the component, cutting an annular groove into the component around the area, measuring through terminal leads extending from the strain gage means the change in electrical response of the strain gage means, due to the cutting of successive layers of material out of the groove, as indicative of the intrinsic stress existing prior thereto, and measuring the depth of the layer of removed material or the corresponding depth of the groove after each incremental cut, a crown boring tool for machining the annular groove around the measuring area, the tool having a shaft hollow throughout and being mounted in a hollow boring spindle whereby the terminal leads of the strain gage means attached to the measuring area are extensible through the tool and the hollow spindle.
    • 包括在用于通过将应变计装置附接到部件的表面测量区域来检查固有应力的结构部件的装置中,将环形槽切割到围绕该区域的部件中,通过从应变计延伸的端子引线进行测量意味着变化 在应变计装置的电响应中,由于将连续的材料层从凹槽中切割出来,表示存在于其之前的固有应力,并且测量去除材料层的深度或凹槽的相应深度 在每个增量切割之后,用于在测量区域周围加工环形槽的胎冠钻孔工具,该工具具有整个中空的轴中空并且安装在中空镗孔中,由此连接到测量区域的应变计装置的端子引线是可扩展的 通过工具和中空心轴。