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公开(公告)号：US4522066A
公开(公告)日：1985-06-11
申请号：US498042
申请日：1983-05-25
申请人： Walter P. Kistler , Martin D. Chinn
发明人： Walter P. Kistler , Martin D. Chinn
CPC分类号： G01B7/16
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US4064744A
公开(公告)日：1977-12-27
申请号：US692977
申请日：1976-06-04
申请人： Walter P. Kistler
发明人： Walter P. Kistler
CPC分类号： G01B7/18
摘要： A strain sensor or extensiometer with electrical output designed to measure relative displacements between two axially spaced points on a stressed structure comprising an elongated body with two end sections and a centrally located flexible beam extending in a direction perpendicular to the longitudinal axis of the sensor body. Relative displacements of the end sections generate two opposing symmetrical torques at the ends of the beam. These torques or bending moments are impressed onto the beam through two sets of flexible bridges which are symmetrically located but unequally spaced on opposite sides of the beam. These two torques or couples cause the beam to bend evenly over its entire length. Resistance strain gages bonded to both sides of the beam at its center measure this bending.
摘要翻译： 具有电输出的应变传感器或延伸计，其设计用于测量受力结构上的两个轴向间隔的点之间的相对位移，包括具有两个端部的细长主体和沿垂直于传感器主体的纵向轴线的方向延伸的居中定位的柔性梁。 端部的相对位移在梁的端部处产生两个相对的对称扭矩。 这些扭矩或弯矩通过对称定位但在梁的相对侧上不等间隔的两组柔性桥梁施加在梁上。 这两个扭矩或配对使梁在其整个长度上均匀地弯曲。 电阻应变计在其中心处结合到梁的两侧测量该弯曲。
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公开(公告)号：US4526247A
公开(公告)日：1985-07-02
申请号：US458887
申请日：1983-01-18
申请人： Errol P. EerNisse , Mark D. Gaiser , John P. Hanley , Walter P. Kistler , Jerome M. Paros , Robert B. Wiggins
发明人： Errol P. EerNisse , Mark D. Gaiser , John P. Hanley , Walter P. Kistler , Jerome M. Paros , Robert B. Wiggins
摘要： A transducer system for a weighing scale having a flexure mode crystal resonator includes a parallelogram linkage for supporting the load platform of the scale, a mounting structure for mounting the crystal resonator between two pivotally connected mounting arms, and a coupling assembly for coupling force from the parallelogram linkage to one arm of the mounting structure.
摘要翻译： 用于具有挠曲模式晶体谐振器的称重秤的换能器系统包括用于支撑刻度尺的负载平台的平行四边形连杆，用于将晶体谐振器安装在两个枢轴连接的安装臂之间的安装结构，以及用于将来自 平行四边形连接到安装结构的一个臂。
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公开(公告)号：US4454770A
公开(公告)日：1984-06-19
申请号：US334252
申请日：1981-12-24
申请人： Walter P. Kistler
发明人： Walter P. Kistler
CPC分类号： G01L1/2243 , G01G21/24 , G01G3/1412
摘要： A load cell having a parallelogram configuration formed by a pair of spaced-apart, generally parallel force-receiving members interconnected by a cantilever beam and a parallel spacer beam. The cantilever beam projects perpendicularly from one of the force-receiving members, and its end is secured to the other beam by a flexure hinge. The ends of the spacer beam are secured to the force-receiving members by respective flexure hinges. In order to maintain the parallelogram configuration of the load cell, the length of the spacer beam is equal to the length of the cantilever beam from the beam's virtual pivot point to its end. Rotational moments imparted to the force-receiving members apply forces to the beams along their longitudinal axes without deflecting the cantilever beam, thus making the load cell insensitive to such moments. A reduced thickness portion instrumented with semiconductor strain gauges is formed in the cantilever beam near its point of attachment with the force-receiving member. The reduced thickness portion accurately positions the virtual pivot point of the beam and it concentrates the stress at the strain gauges. The load cell may be used in a scale by securing one of the load-receiving members on a base and mounting a load-receiving tray on the other load-receiving member.
摘要翻译： 具有由平行四边形构型形成的负载传感器，该平衡四边形构造由通过悬臂梁和平行间隔梁互连的一对间隔开的大致平行的受力构件形成。 悬臂梁从其中一个力接收构件垂直地突出，并且其端部通过挠性铰链固定到另一个梁。 间隔梁的端部通过相应的挠性铰链固定到受力构件上。 为了保持测力传感器的平行四边形结构，间隔梁的长度等于从梁的虚拟枢轴点到其端部的悬臂梁的长度。 赋予力接收部件的旋转力矩沿其纵向轴向梁施加力而不偏转悬臂梁，从而使称重传感器对这种力矩不敏感。 装配有半导体应变计的厚度减小的部分在靠近与受力部件的连接点处的悬臂梁中形成。 减小的厚度部分准确地定位梁的虚拟枢轴点，并将应力集中在应变计上。 可以通过将负载接收构件中的一个固定在基座上并将负载接收托盘安装在另一个承载构件上来将测力传感器以比例尺使用。
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公开(公告)号：US07318358B2
公开(公告)日：2008-01-15
申请号：US11098027
申请日：2005-04-01
申请人： Walter P. Kistler
发明人： Walter P. Kistler
CPC分类号： G01B7/16 , G01G21/23 , G01M3/2807
摘要： A strain sensor includes a sensor body extending substantially in a plane. The sensor body is substantially symmetric in the plane about a first axis and a second axis that is perpendicular to the first axis. The sensor body includes a plurality of sensor body portions symmetrically spaced apart about the first axis and the second axis with the plurality of sensor body portions interconnected by respective beams. The strain sensor further includes at least one strain sensing element mounted on one of the respective beams.
摘要翻译： 应变传感器包括基本上在平面内延伸的传感器体。 传感器主体在平面中围绕第一轴线和垂直于第一轴线的第二轴线基本对称。 传感器主体包括多个传感器本体部分，其围绕第一轴线和第二轴线对称地间隔开，多个传感器主体部分通过相应的光束互连。 应变传感器还包括安装在各个梁之一上的至少一个应变感测元件。
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公开(公告)号：US4996882A
公开(公告)日：1991-03-05
申请号：US522229
申请日：1990-05-11
申请人： Walter P. Kistler
发明人： Walter P. Kistler
CPC分类号： G01G3/1402 , G01B7/16 , G01L1/2206
摘要： A strain sensor is provided which includes a base member and a pair of mounting points for mounting the base member to a support structure supporting a vessel for weighing the contents of the vessel. The base member defines a cylindrically shaped well located at the center of base member. The area of the base member within the well defines a pair of apertures symmetrically located on opposite sides of a central longitudinal axis of the base member. The base member also defines a pair of notches located on opposite edges of the base member which run parallel to the longitudinal axis of the base member. An axial strain sensing element is mounted in the well along the longitudinal axis of the base member for sensing the axial strain in the support structure. In addition, a transverse strain sensing element is mounted in the well perpendicular to the axial strain sensing element for detecting strain a direction transverse to the longitudinal axis of the base member.
摘要翻译： 提供一种应变传感器，其包括基部构件和用于将基座构件安装到支撑结构的一对安装点，所述支撑结构支撑用于称重容器内容物的容器。 基座构件限定位于基座构件中心的圆柱形的孔。 孔内的基部构件的区域限定了对称地位于基底构件的中心纵向轴线的相对侧上的一对孔。 基部构件还限定位于基部构件的相对边缘上的一对凹口，其平行于基部构件的纵向轴线延伸。 轴向应变感测元件沿着基座的纵向轴线安装在井中，用于感测支撑结构中的轴向应变。 此外，横向应变感测元件安装在垂直于轴向应变传感元件的阱中，用于检测横向于基部构件的纵向轴线的方向的应变。
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公开(公告)号：US4596155A
公开(公告)日：1986-06-24
申请号：US566047
申请日：1983-12-27
申请人： Walter P. Kistler
发明人： Walter P. Kistler
CPC分类号： G01L1/2231 , G01B7/18
摘要： An isotropic strain sensor having four mounting points interconnected by four legs, two of which are bowed toward each other and two of which are bowed away from each other. A strain sensing element mounted on at least one of the legs provides an electrical indication of the deflection of the leg. As a result, the strain sensor measures isotropic strains in an object to which the strain sensor is attached through the mounting points. Another embodiment of the strain sensor utilizes three mounting points interconnected by legs, two of which are bowed outwardly and one of which is bowed inwardly. Both embodiments of the strain sensor produce outputs that are a nonlinear function of the sensed isotropic strain. This nonlinear characteristic allows the strain sensor to provide an output that is a linear function of the load applied between the center and outer periphery of a freely supported disc that has a strain that is a nonlinear function of the applied load.
摘要翻译： 各向同性应变传感器具有四个由四个腿相互连接的安装点，其中两个彼此相互弯曲并且彼此相互弯曲。 安装在至少一个腿上的应变感测元件提供腿的偏转的电指示。 因此，应变传感器在应变传感器通过安装点附着的物体中测量各向同性应变。 应变传感器的另一个实施例利用由腿相互连接的三个安装点，其中两个安装点向外弯曲并且其中一个向内弯曲。 应变传感器的两个实施例产生作为感测各向同性应变的非线性函数的输出。 该非线性特性允许应变传感器提供输出，该输出是施加在自由支撑的盘的中心和外周之间的负载的线性函数，其具有作为所施加的负载的非线性函数的应变。
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公开(公告)号：US5313022A
公开(公告)日：1994-05-17
申请号：US975464
申请日：1992-11-12
CPC分类号： G01G3/141 , G01L1/2231
摘要： A load cell adapted to be positioned between a foundation and each of several support members for a storage vessel. The load cell includes a circular flex plate having a pair of concentric cylindrical members of different diameters secured to opposite surfaces. A mounting pad adapted to be fastened to the foundation is secured to one of the cylindrical members. A mounting plate is secured to the other cylindrical member. The mounting plate has either a single threaded bore or a threaded stud positioned at the common axis of the cylindrical members for securing the mounting plate to a vessel support member. A strain sensor mounted on the flex plate measures the load-induced deflection of the flex plate.
摘要翻译： 适于定位在基座和用于储存容器的几个支撑构件中的每一个之间的称重传感器。 称重传感器包括圆形弯曲板，其具有固定到相对表面的不同直径的一对同心圆柱形构件。 适于紧固到基座的安装垫固定到一个圆柱形构件。 安装板固定在另一个圆柱形构件上。 安装板具有单个螺纹孔或位于圆柱形构件的公共轴线处的螺柱，用于将安装板固定到容器支撑构件。 安装在柔性板上的应变传感器测量挠性板的负载引起的挠曲。
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公开(公告)号：US4751849A
公开(公告)日：1988-06-21
申请号：US875327
申请日：1986-06-17
申请人： Jerome M. Paros , Donald W. Busse , Martin D. Chinn , Walter P. Kistler , Richard B. Wearn, Jr.
发明人： Jerome M. Paros , Donald W. Busse , Martin D. Chinn , Walter P. Kistler , Richard B. Wearn, Jr.
IPC分类号： G01G3/16 , G01L1/16 , G01P15/097 , G01P15/10 , G01L1/10
CPC分类号： G01P15/097 , G01G3/16 , G01L1/162 , G01P2015/0828
摘要： A load cell having single or multiple resonators arranged to receive a strain that is proportional to the strain in a beam to which the resonator(s) is attached. Arrangement of the multiple resonators with respect to a force-bearing beam of the cell determines whether the cell is a bending mode load cell or a shear mode load cell. Absolute and differential pressure sensors, accelerometers and weighing devices are disclosed which employ the multiple-resonators of the invention.
摘要翻译： 具有单个或多个谐振器的测力传感器被布置成接收与谐振器所附接的波束中的应变成比例的应变。 多个谐振器相对于电池的承力梁的布置确定电池是弯曲模式称重传感器还是剪切模式称重传感器。 公开了使用本发明的多谐振器的绝对压差传感器和差压传感器，加速度计和称重装置。
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公开(公告)号：US4651569A
公开(公告)日：1987-03-24
申请号：US729476
申请日：1985-05-01
CPC分类号： G01P15/08 , G01G5/06 , G01L1/162 , G01L9/0022 , G01L9/0026
摘要： A digital differential pressure sensor with relatively low sensitivity to common mode line pressure errors. The sensor includes an airtight enclosure having a pair of pressure ports through which pressures are coupled to opposite sides of a pressure-sensing diaphragm, bellows, or Bourdon tube. The pressure-sensing elements generate torques which are transmitted by a shaft to stress-sensitive resonators which are isolated from the torque-producing elements by a sealed, flexible tube.
摘要翻译： 数字差压传感器对共模线路压力误差的灵敏度较低。 传感器包括具有一对压力端口的气密外壳，压力通过该压力端口连接到压力感测隔膜，波纹管或布尔登管的相对侧。 压力感测元件产生的转矩由轴传递给应力敏感的谐振器，它们通过密封的柔性管与转矩产生元件隔离。
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