公开(公告)号：US2912642A

公开(公告)日：1959-11-10

申请号：US42107454

申请日：1954-04-05

Applicant: ASEA AB

Inventor： ORVAR DAHLE

IPC: G01L1/12 ,  G01R33/18

CPC classification number: G01R33/18 ,  G01L1/125 ,  G01L1/127 ,  Y10S73/02

公开(公告)号：US20230304873A1

公开(公告)日：2023-09-28

申请号：US18321592

申请日：2023-05-22

Applicant: PICA Pipeline Inspection and Condition Analysis Corporation

Inventor： David E. Russell ,  Yuwu Yu ,  Ad Shatat ,  Martin Korz

IPC: G01L1/12 ,  G01B7/06

CPC classification number: G01L1/127 ,  G01B7/10

Abstract: A system for detecting and quantifying changes in the stress-strain state of a ferrous structure includes an exciter coil system positioned to generate an AC magnetic field that couples into the ferrous structure. A detector apparatus is positioned relative to the exciter to detect an eddy current magnetic field resulting from the AC magnetic field generated by the exciter coil system. An analyzer compares the eddy current magnetic field parameters detected by the detector apparatus with the direct AC magnetic field transmitted by the exciter coil system and correlates changes in the parameters of the eddy current magnetic field with the stress-strain on the ferrous structure.

公开(公告)号：US20190219458A1

公开(公告)日：2019-07-18

申请号：US16330282

申请日：2017-08-30

Applicant: Torque And More GmbH

Inventor： Lutz MAY

IPC: G01L1/12 ,  H01F27/28 ,  G01L3/10 ,  G01R33/038

CPC classification number: G01L1/125 ,  G01L1/127 ,  G01L3/102 ,  G01L3/105 ,  G01R33/0385 ,  H01F27/28

Abstract: A force measurement device includes a flux concentrator with first, second, third, and fourth poles, a magnetic field generating unit generating a magnetic field applied to a test object, and a magnetic field sensing unit with first, second, third, and fourth magnetic field sensors. The flux concentrator is arranged such that each of its poles concentrates the magnetic field. The first, second, third, and fourth poles are arranged such that they form a quadrangle. A first recess is provided such that the first pole is spaced apart from the second and third poles is spaced apart from the fourth pole. A second recess is provided such that the first pole is spaced apart from the third and second poles is spaced apart from the fourth pole. The magnetic field sensors are arranged opposite to each other with the flux concentrator in between and such that the first and third magnetic field sensors both face the first recess and the second and fourth magnetic field sensors both face the second recess. The magnetic field sensing unit provides a signal as an indicator for a force applied to the test object.

公开(公告)号：US20190187008A1

公开(公告)日：2019-06-20

申请号：US16320846

申请日：2017-07-25

Applicant: Trafag AG

Inventor： Christoph Schanz ,  Dieter Zeisel

IPC: G01L1/12 ,  G01L3/10 ,  B29C45/14

CPC classification number: G01L1/127 ,  B29C45/14819 ,  B29L2031/3425 ,  G01L1/125 ,  G01L3/102 ,  G01L3/105 ,  H01L41/125

Abstract: In order to enable practical suitability of a force or torque sensor and usability for a variety of applications in conjunction with cost-effective production, the invention provides a sensor head (10) for a magnetoelastic force or torque sensor for measuring a force or a torque in a ferromagnetic body (9), comprising: a magnetic field generating unit (14) for generating a magnetic field in the ferromagnetic body (9) and a magnetic field measuring unit (16) for measuring a magnetic field change in the ferromagnetic body (9), wherein the magnetic field generating unit (14) has an excitation coils (18) and a soft-magnetic excitation flux amplifying element (20), wherein the magnetic field measuring unit (16) has a plurality of measurement coil (22) with a soft-magnetic measurement flux amplifying element (24), wherein at least the excitation coil (18) and the measurement coils (22, 22a-22d) are integrated in a common integrated component, such as, in particular, a printed circuit board element (26) and/or MEMS component (28).

公开(公告)号：US10012552B2

公开(公告)日：2018-07-03

申请号：US14948736

申请日：2015-11-23

Applicant: General Electric Company

Inventor： Thomas James Batzinger ,  Bryan J. Germann ,  William F. Ranson

IPC: G01L1/14 ,  G01L1/12 ,  G01M5/00 ,  G01B7/16 ,  G01L1/22

CPC classification number: G01L1/144 ,  G01B7/16 ,  G01L1/12 ,  G01L1/127 ,  G01L1/2287 ,  G01M5/0016 ,  G01M5/0033 ,  G01M5/0041 ,  G01M5/0083 ,  G01M5/0091

Abstract: A system for monitoring a component is provided. The system may include a strain sensor configured on the component, an electrical field scanner for analyzing the strain sensor, and a processor in operable communication with the electrical field scanner. The processor may be operable for measuring an electrical field value across the strain sensor along a mutually-orthogonal X-axis and Y-axis to obtain a data point set. The processor may further be operable for assembling a field profile of the strain sensor based on the data point set. Methods of using the system are also provided.

公开(公告)号：US09983234B2

公开(公告)日：2018-05-29

申请号：US15125054

申请日：2015-03-10

Applicant: Qortek, Inc.

Inventor： Gareth J. Knowles ,  William M. Bradley ,  Jonathan M. Zook ,  Ross Bird ,  Safakcan Tuncdemir

IPC: G01B7/24 ,  G01R33/18 ,  G01R15/18 ,  H01L41/12 ,  G01L1/22 ,  G01R33/00 ,  G01L1/12

CPC classification number: G01R15/183 ,  G01L1/127 ,  G01L1/2206 ,  G01R15/18 ,  G01R33/0052 ,  H01L41/12

Abstract: A non-contact, current sensor includes a gapped magnetic core configured to circumscribe a current carrying conductor. A magnetostrictive element is mechanically coupled to the gapped magnetic core. Current flowing in the current carrying conductor induces a magnetic field in the magnetic core that flows through the magnetostrictive element. The gapped magnetic core is provided with mounting sections to which the magnetostrictive element is mechanically coupled. The mounting sections have a geometry that increases magnetic flux in the magnetostrictive element. A strain gauge is mechanically coupled to the magnetostrictive element to measure displacement in the element induced by the magnetic flux.

公开(公告)号：US09851265B2

公开(公告)日：2017-12-26

申请号：US14377298

申请日：2013-01-24

Applicant: MAPS Technology Limited

Inventor： David John Buttle

IPC: H01F38/14 ,  G01N27/72 ,  G01L1/12 ,  G01N27/90 ,  G01L5/00 ,  G01R33/12

CPC classification number: G01L1/127 ,  G01L5/0047 ,  G01N27/72 ,  G01N27/9033 ,  G01R33/12

Abstract: An apparatus for measuring material properties of an object of ferromagnetic material, the apparatus including a probe, the probe including an electromagnet core defining two spaced-apart poles for inducing a magnetic field in the object, and a drive coil wound around the electromagnet core, and means to supply an alternating electric current to the drive coil to generate an alternating magnetic field in the electromagnet core and consequently in the object, wherein the probe also includes two sensing coils arranged in the vicinity of each of the poles, for sensing the magnetic flux density that links the core and the object, such sensing coils are significantly more sensitive to changes in material properties than are sensing coils overwound onto the drive coil.

公开(公告)号：US20170074906A1

公开(公告)日：2017-03-16

申请号：US15125054

申请日：2015-03-10

Applicant: Qortek, Inc.

Inventor： Gareth J. Knowles ,  William M. Bradley ,  Jonathan M. Zook ,  Ross Bird ,  Safakcan Tuncdemir

IPC: G01R15/18 ,  G01R33/00

CPC classification number: G01R15/183 ,  G01L1/127 ,  G01L1/2206 ,  G01R15/18 ,  G01R33/0052 ,  H01L41/12

Abstract: A non-contact, current sensor includes a gapped magnetic core configured to circumscribe a current carrying conductor. A magnetostrictive element is mechanically coupled to the gapped magnetic core. Current flowing in the current carrying conductor induces a magnetic field in the magnetic core that flows through the magnetostrictive element. The gapped magnetic core is provided with mounting sections to which the magnetostrictive element is mechanically coupled. The mounting sections have a geometry that increases magnetic flux in the magnetostrictive element. A strain gauge is mechanically coupled to the magnetostrictive element to measure displacement in the element induced by the magnetic flux.

Abstract translation: 非接触式电流传感器包括配置成围绕载流导体的间隙磁芯。 磁致伸缩元件机械耦合到有间隙的磁芯。 在载流导体中流动的电流在磁芯中的磁场中产生流过磁致伸缩元件的磁场。 有间隙的磁芯设有安装部分，磁致伸缩元件机械耦合到该安装部分。 安装部分具有增加磁致伸缩元件中的磁通量的几何形状。 应变计机械耦合到磁致伸缩元件以测量由磁通量引起的元件中的位移。

公开(公告)号：US20160252415A1

公开(公告)日：2016-09-01

申请号：US14973301

申请日：2015-12-17

Applicant: General Electric Company

Inventor： Dan Tho Lu ,  Pekka Tapani Sipila ,  Clifford James Uber

IPC: G01L3/10

CPC classification number: G01L3/102 ,  G01L1/127 ,  G01L3/105 ,  G01L25/003

Abstract: A system includes a magnetostrictive sensor having a sensor head including a driving pole. The driving pole includes a driving coil that may receive a driving current and may emit a magnetic flux portion through a rotary structure. The sensor head also includes a sensing pole including a sensing coil that may receive the magnetic flux portion and may transmit a signal based at least in part on the received magnetic flux portion. The received magnetic flux portion is based at least in part on a force on the rotary structure. The sensor head also includes a temperature sensor disposed on the sensor head. The temperature sensor may measure a temperature of the rotary structure.

Abstract translation: 一种系统包括具有包括驱动极的传感器头的磁致伸缩传感器。 驱动极包括可以接收驱动电流的驱动线圈，并且可以通过旋转结构发射磁通部分。 传感器头还包括感测极，其包括感测线圈，该感测线圈可以接收磁通部分，并且可以至少部分地基于所接收的磁通量部分传输信号。 所接收的磁通部分至少部分地基于旋转结构上的力。 传感器头还包括设置在传感头上的温度传感器。 温度传感器可以测量旋转结构的温度。

公开(公告)号：US09228859B2

公开(公告)日：2016-01-05

申请号：US13627745

申请日：2012-09-26

Applicant: Northeastern University

Inventor： Richard Ranky ,  Constantinos Mavroidis

IPC: B05D3/14 ,  A61F5/00 ,  G01L3/00 ,  G01L3/14 ,  G01D11/00 ,  H01L41/314 ,  H01L41/29 ,  G01L9/00 ,  G01L9/02 ,  G01L25/00 ,  G01L1/06 ,  G01L1/12 ,  G01L1/14 ,  G01B7/16 ,  A61F5/01

CPC classification number: G01D11/00 ,  A61F5/0102 ,  A61F5/0127 ,  A61F2005/0188 ,  B33Y80/00 ,  G01B7/18 ,  G01L1/06 ,  G01L1/127 ,  G01L1/142 ,  G01L9/0072 ,  G01L9/02 ,  G01L25/00 ,  H01L41/29 ,  H01L41/314 ,  Y10T29/49117

Abstract: A method of constructing a sensor includes depositing a first material in a predetermined arrangement to form a structure. The depositing results in at least one void occurring within the structure. The method further includes depositing a second material within the voids. The second material may have electrical properties that vary according to deformation of the second material. The method also includes providing electrical access to the second material to enable observation of the one or more electrical properties. A sensor includes a structure that has one or more voids distributed within the structure. The sensor also includes a material deposited within the one or more voids. The material may be characterized by one or more electrical properties such as piezoresistivity. The sensor includes a first contact electrically coupled to a first location on the material, and a second contact electrically coupled to a second location on the material.

Abstract translation: 构造传感器的方法包括以预定布置沉积第一材料以形成结构。 沉积导致在结构内发生的至少一个空隙。 该方法还包括在空隙内沉积第二材料。 第二材料可以具有根据第二材料的变形而变化的电特性。 该方法还包括提供对第二材料的电接触以能够观察一个或多个电性能。 传感器包括具有分布在结构内的一个或多个空隙的结构。 传感器还包括沉积在一个或多个空隙内的材料。 材料的特征可以是一种或多种电性能，例如压电阻。 传感器包括电耦合到材料上的第一位置的第一触点和电耦合到材料上的第二位置的第二触点。