公开(公告)号：US4914611A

公开(公告)日：1990-04-03

申请号：US57534

申请日：1987-06-01

Applicant: Masami Yamanaka ,  Shinichi Inoue

Inventor： Masami Yamanaka ,  Shinichi Inoue

IPC: G01L1/00 ,  G01G23/48 ,  G01L1/10 ,  G01L1/26

CPC classification number: G01L1/10 ,  G01G23/48 ,  G01L1/26

Abstract: A force measuring device, such as a weighing device, having device for automatically compensating for temperature-induced zero and span deviations. The device includes force and temperature sensors for producing force and temperature indicative signals, respectively. Device for processing processes these force and temperature signals at various temperatures in no-load and reference-load conditions by regressive analysis in order to obtain and store in memory equations representing the zero and span deviations with temperature. During use of the force measuring device for measurement, the device uses the stored equations to calculate the zero and span deviations from the current temperature to correct the force indicative signal.

Abstract translation: 力测量装置，例如称重装置，具有用于自动补偿温度引起的零和跨度偏差的装置。 该装置包括分别用于产生力和温度指示信号的力和温度传感器。 用于处理的装置通过回归分析在空载和参考负载条件下在各种温度下处理这些力和温度信号，以便获得并存储表示零温度和跨度偏差随温度的存储器方程式。 在使用力测量装置进行测量时，装置使用存储的方程来计算与当前温度的零点和跨度偏差，以校正力指示信号。

公开(公告)号：US4118977A

公开(公告)日：1978-10-10

申请号：US732129

申请日：1976-10-13

Applicant: Everett O. Olsen ,  Donald C. Simpson ,  David A. Richardson

Inventor： Everett O. Olsen ,  Donald C. Simpson ,  David A. Richardson

IPC: G08C19/02 ,  G01L1/10

CPC classification number: G01L1/10 ,  Y10S73/01

Abstract: A force-measuring instrument of the vibrating-wire type wherein the mechanical components are located at the force-measuring location and the vibrating wire is coupled through a two-wire transmission line to electronic circuitry at a distant location. The electronic circuitry includes means to excite the vibrating wire and to produce a d-c measurement output signal corresponding to the frequency of vibrations. The electronic circuitry further includes function-generating means to establish a closely-linear relationship between the output current and the force applied to the wire. Means also are incorporated in the electronic circuitry for adjusting the zero and span of the instrument, and this can be done without interaction between the adjustments.

Abstract translation: 一种振弦式的力测量仪器，其中机械部件位于力测量位置处，并且振弦通过双线传输线耦合到远处的电子电路。 电子电路包括激励振弦并产生对应于振动频率的d-c测量输出信号的装置。 电子电路还包括功能产生装置，用于建立输出电流和施加到电线的力之间的紧密线性关系。 手段也被并入用于调整仪器的零点和跨度的电子电路中，并且这可以在调整之间没有相互作用的情况下完成。

公开(公告)号：US4099411A

公开(公告)日：1978-07-11

申请号：US780337

申请日：1977-03-23

Applicant: George Albert Woolvet ,  Bryan Peter Tolley

Inventor： George Albert Woolvet ,  Bryan Peter Tolley

IPC: G01L1/10

CPC classification number: G01L1/10 ,  Y10S73/01

Abstract: Apparatus and methods for measuring strain and torque are described. The apparatus, which is used in the methods, usually includes a thin walled cylinder within a thick walled cylinder, the cylinders being fixed together at their ends only, means for vibrating the walls of the thin walled cylinder and means for indicating the frequency of vibration. As torque is applied to the thick walled cylinder and therefore to the thin walled cylinder, longitudinal strain appears in the thin walled cylinder and the frequency of vibration changes. Thus an indication is obtained of the applied torque or of strain in a test member applying the torque.

Abstract translation: 描述了用于测量应变和扭矩的装置和方法。 在该方法中使用的装置通常包括在厚壁圆柱体内的薄壁圆柱体，圆柱体仅在其端部固定在一起，用于振动薄壁圆柱体的壁的装置和用于指示振动频率的装置 。 当扭矩施加到厚壁圆筒体上，因此施加到薄壁圆筒时，薄壁圆柱体中出现纵向应变，振动频率变化。 因此，获得施加扭矩的测试构件中施加的扭矩或应变的指示。

公开(公告)号：US4086809A

公开(公告)日：1978-05-02

申请号：US761533

申请日：1977-01-24

Applicant: Peter T. K. Wu ,  John R. M. Viertl

Inventor： Peter T. K. Wu ,  John R. M. Viertl

IPC: G01L1/10 ,  G01L5/04 ,  G01M99/00

CPC classification number: G01M99/00 ,  G01L1/10 ,  G01L5/042 ,  Y10S73/01

Abstract: A loaded spring in a pressure relief valve or other spring-loaded device is excited with acoustic vibrations and the resonant frequencies of selected vibration modes are measured. Changes in spring constant due to aging and high temperature are detected by monitoring the longitudinal vibration mode resonant frequency, and changes in loading by monitoring the transverse and/or torsional vibration mode resonant frequency. The pressure set point is ascertained from manufacturing data of resonant frequency versus set point.

Abstract translation: 压力释放阀或其他弹簧加载装置中的负载弹簧被声振动激发，并且测量所选振动模式的谐振频率。 通过监测纵向振动模式共振频率和监测横向和/或扭转振动模式共振频率的负载变化来检测由于老化和高温引起的弹簧常数的变化。 压力设定点由谐振频率与设定值的制造数据确定。

公开(公告)号：US3942369A

公开(公告)日：1976-03-09

申请号：US175060

申请日：1971-08-26

Applicant: Edwin O. Roggenstein ,  Donald Allen Andrews ,  Chockalingam Manthiram

Inventor： Edwin O. Roggenstein ,  Donald Allen Andrews ,  Chockalingam Manthiram

IPC: G01L1/10 ,  G01N29/12 ,  G01N29/00

CPC classification number: G01L1/10 ,  G01N29/12

Abstract: Resonant vibration is employed for imparting oscillations to a stressed wire, cable or metallic strip for the purpose of measuring its tension or for setting the vibrated member at a desired tension. A U-shaped magnetic resonator has an air gap to receive a stressed wire or cable and to impart vibrations thereto, the air gap being of such a width as to permit the received element to vibrate freely at its resonant frequency. The tension of the stressed element can be measured by varying the frequency of the resonator and noting when the condition of resonance exists or the tension of the element may be set by varying its tension while subjected to a steady predetermined pulsating magnetic flux field until the condition of resonance is noted. Either operation is performed in the absence of current flow through the stressed element.

Abstract translation: 为了测量其张力或将振动构件设置在所需张力的目的，采用共振来施加应力的电线，电缆或金属带振荡。 U形磁共振器具有气隙以接收受应力的电线或电缆并给其施加振动，所述气隙具有允许所接收的元件以其谐振频率自由振动的宽度。 应力元件的张力可以通过改变谐振器的频率来测量，并且当存在谐振的情况时可以记录谐振的状态，或者可以通过在受到稳定的预定的脉动磁通场的情况下改变其张力来设定元件的张力，直到条件 注意到共振。 在没有电流通过应力元件的情况下执行任一操作。

公开(公告)号：US3505866A

公开(公告)日：1970-04-14

申请号：US3505866D

申请日：1966-10-13

Applicant: SINGER GENERAL PRECISION

Inventor： WEISBORD LEON ,  PAROS JEROME MARTIN

IPC: G01L1/10 ,  G01P15/097 ,  G01P15/10

CPC classification number: G01P15/097 ,  G01L1/10

公开(公告)号：US2854581A

公开(公告)日：1958-09-30

申请号：US62095256

申请日：1956-11-07

Applicant: FERRANTI LTD

Inventor： SCARROTT GORDON G

IPC: G01L1/10

CPC classification number: G01L1/10

公开(公告)号：US2667068A

公开(公告)日：1954-01-26

申请号：US6328648

申请日：1948-12-03

Applicant: VIEHE FREDERICK W ,  HARRIS COURTENAY B

Inventor： VIEHE FREDERICK W ,  HARRIS COURTENAY B

IPC: G01L1/10 ,  G01L5/04 ,  G01M7/00

CPC classification number: G01L5/042 ,  G01L1/10 ,  G01M7/00 ,  Y10S73/01

公开(公告)号：US20240183810A1

公开(公告)日：2024-06-06

申请号：US18438983

申请日：2024-02-12

Applicant: GIATEC SCIENTIFIC INC.

Inventor： POURIA GHODS ,  ROUHOLLAH ALIZADEH ,  MUSTAFA SALEHI

IPC: G01N27/04 ,  G01L1/10 ,  G01L1/20 ,  G01L1/22 ,  G01N17/00 ,  G01N17/02 ,  G01N17/04 ,  G01N27/02 ,  G01N33/38 ,  G01R27/00

CPC classification number: G01N27/04 ,  G01N17/02 ,  G01N17/04 ,  G01N27/02 ,  G01N27/026 ,  G01N33/383 ,  G01L1/10 ,  G01L1/20 ,  G01L1/22 ,  G01N17/00 ,  G01N17/006 ,  G01R27/00

Abstract: Hundreds of thousands of concrete bridges and hundreds of billions of tons of concrete require characterization with time for corrosion. Accordingly, protocols for rapid testing and improved field characterization systems that automatically triangulate electrical resistivity and half-cell corrosion potential measurements would be beneficial allowing discrete/periodic mapping of a structure to be performed as well as addressing testing for asphalt covered concrete. Further, it is the low frequency impedance of rebar in concrete that correlates to corrosion state but these are normally time consuming vulnerable to noise. Hence, it would be beneficial to provide a means of making low frequency electrical resistivity measurements rapidly. Further, prior art techniques for electrical rebar measurements require electrical connection be made to the rebar which increases measurement complexity/disruption/repair/cost even when no corrosion is identified. Beneficially a method of determining the state of a rebar without electrical contact is taught.

公开(公告)号：US11686627B2

公开(公告)日：2023-06-27

申请号：US16604426

申请日：2018-04-10

Applicant: Etegent Technologies LTD.

Inventor： Richard A. Roth, II ,  Stuart J. Shelley ,  Kevin Sigmund ,  Oleg Lobkis

IPC: G01K11/24 ,  G01L1/10 ,  G01L11/06 ,  G01N29/44 ,  H01P3/10 ,  G01N29/42 ,  G01N29/07 ,  G10K11/24

CPC classification number: G01K11/24 ,  G01L1/10 ,  G01L11/06 ,  G01N29/075 ,  G01N29/42 ,  G01N29/44 ,  G01N29/4454 ,  G10K11/24 ,  H01P3/10 ,  G01N2291/044

Abstract: An active mechanical waveguide including an ultrasonically-transmissive material and a plurality of reflection points defined along a length of the waveguide may be driven at multiple resonant frequencies to sense environmental conditions, e.g., using tracking of a phase derivative. In addition, frequency-dependent reflectors may be incorporated into an active mechanical waveguide, and a drive frequency may be selected to render the frequency-dependent reflectors substantially transparent.