公开(公告)号：US11906455B2

公开(公告)日：2024-02-20

申请号：US18066642

申请日：2022-12-15

Applicant: GIATEC SCIENTIFIC INC.

Inventor： Pouria Ghods ,  Rouhollah Alizadeh ,  Mustafa Salehi

IPC: G01R27/08 ,  G01N27/04 ,  G01N17/02 ,  G01N33/38 ,  G01N27/02 ,  G01N17/04 ,  G01L1/10 ,  G01N17/00 ,  G01L1/20 ,  G01L1/22 ,  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：US20170108386A1

公开(公告)日：2017-04-20

申请号：US15287171

申请日：2016-10-06

Applicant: AISIN SEIKI KABUSHIKI KAISHA

Inventor： Manabu KATO

IPC: G01L1/22 ,  G01R27/02 ,  G05F3/26

CPC classification number: G01L1/225 ,  G01L1/10 ,  G01L1/20 ,  G01L1/22 ,  G01N17/00 ,  G01N27/02 ,  G01N27/04 ,  G01R27/00 ,  G01R27/02 ,  G01R27/2605 ,  G05F3/26

Abstract: A current source circuit flowing an output current to at least one detection element including a first terminal to which a first voltage is supplied and a second terminal being connected to the current source circuit includes a reference resistance, a current mirror circuit including at least one first transistor and at least one second transistor, and a control circuit controlling a voltage of a common wire that is connected to a terminal provided at the first transistor and a terminal provided at the second transistor such that a voltage of a terminal provided at the reference resistance comes to be equal to a reference voltage.

公开(公告)号：US20160231368A1

公开(公告)日：2016-08-11

申请号：US14974434

申请日：2015-12-18

Applicant: FUJITSU LIMITED

Inventor： Masakazu Kishi ,  Hajime Kubota ,  Masayuki ITOH

IPC: G01R29/22 ,  H03H9/10 ,  H03B5/32 ,  H03H9/13

CPC classification number: G01R29/22 ,  G01L1/10 ,  G01L1/162 ,  G01L9/008 ,  H03B5/32 ,  H03H9/1021 ,  H03H9/13

Abstract: A crystal unit includes: a crystal blank; an excitation electrode formed on the crystal blank and excites a main vibration of the crystal blank; a housing that accommodates the crystal blank; and a sub-vibration electrode formed on the housing and excites a sub-vibration of the crystal blank.And a method for inspecting a crystal unit, the method includes: generating a sub-vibration in a crystal blank by applying an input signal to a sub-vibration electrode formed on a housing, which accommodates the crystal blank, via external electrodes which are electrically coupled to the sub-vibration electrode and formed on the outer surface of the housing; obtaining an output of the crystal unit via the external electrodes; obtaining frequency characteristics of impedance between the external electrodes based on the output; and comparing the obtained frequency characteristics with the reference frequency characteristics indicating the quality of the crystal unit.

Abstract translation: 晶体单元包括：晶体空白; 形成在晶体坯上的激励电极，激发晶体坯的主振动; 容纳晶体空白的壳体; 以及形成在壳体上的辅助振动电极，并且激发晶体坯的亚振动。 以及一种用于检查晶体单元的方法，该方法包括：通过外部电极将形成在容纳晶体坯料的壳体上形成的辅助振动电极施加输入信号，从而在晶体坯体中产生亚振动 耦合到副振动电极并形成在壳体的外表面上; 通过外部电极获得晶体单元的输出; 基于输出获得外部电极之间的阻抗的频率特性; 并将获得的频率特性与表示晶体单元的质量的参考频率特性进行比较。

公开(公告)号：US20160072472A1

公开(公告)日：2016-03-10

申请号：US14627801

申请日：2015-02-20

Applicant: CARNEGIE MELLON UNIVERSITY, a Pennsylvania Non-Profit Corporation

Inventor： Gary K. Fedder ,  Congzhong Guo

IPC: H03H9/02

CPC classification number: H03J1/00 ,  G01C19/5776 ,  G01L1/10 ,  G01N29/022 ,  G01N29/036 ,  G01N29/12 ,  G01N2291/02491 ,  G01N2291/0256

Abstract: A bi-state bifurcation-based control system and method for nonlinear resonators, which utilizes a control loop to servo on the edge of the bifurcation jump, either at the maximum “on” point prior to the Duffing bifurcation jump or along the rising edge of the parametric bifurcation.

Abstract translation: 一种用于非线性谐振器的双态分岔控制系统和方法，其利用控制回路在分岔跳跃的边缘上进行伺服，或者在Duffing分岔跳跃之前的最大“开”点处，或沿着上升沿 参数分岔。

公开(公告)号：US20150355043A1

公开(公告)日：2015-12-10

申请号：US14718257

申请日：2015-05-21

Applicant: NXP B.V.

Inventor： Peter Steeneken ,  Jozef van Beek ,  Willem Besling

IPC: G01L25/00

CPC classification number: G01L25/00 ,  G01L1/10 ,  G01L1/26 ,  G01Q60/24

Abstract: Aspects of the present disclosure are directed to force sensors. As may be implemented in accordance with one or more embodiments, an apparatus includes a force-responsive component having a resonant frequency, and a circuit that compensates for variations with the force-responsive component. The force-responsive component moves in response to an applied force, in accordance with a spring constant that is susceptible to fluctuation. The compensation circuit determines Brownian motion of the force-responsive component at the resonant frequency based on temperature, and generates an output based on the determined Brownian motion and movement of the force-responsive component. Such an output is indicative of force applied to the apparatus.

Abstract translation: 本公开的方面涉及力传感器。 如可以根据一个或多个实施例来实现的，装置包括具有谐振频率的力响应分量，以及用力响应分量来补偿变化的电路。 力响应部件响应于所施加的力，根据容易变动的弹簧常数而移动。 补偿电路基于温度来确定谐振频率下的力响应分量的布朗运动，并且基于确定的布朗运动和力响应分量的运动产生输出。 这种输出表示施加到设备的力。

公开(公告)号：US20140210494A1

公开(公告)日：2014-07-31

申请号：US14168254

申请日：2014-01-30

Applicant: Giatec Scientific Inc.

Inventor： Pouria Ghods ,  Rouhollah Alizadeh ,  Mustafa Salehi

IPC: G01N27/04

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

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.

Abstract translation: 数以万计的混凝土桥梁和数百亿吨混凝土需要随时间进行腐蚀鉴定。 因此，自动三角测量电阻率和半电池腐蚀电位测量的快速测试和改进的场表征系统的协议将是有利的，允许执行结构的离散/周期性映射以及解决沥青混凝土的测试。 此外，混凝土中钢筋的低频阻抗与腐蚀状态相关，但这些通常耗时易受噪音影响。 因此，提供一种快速进行低频电阻率测量的方法将是有益的。 此外，用于电钢筋测量的现有技术需要对钢筋进行电连接，即使在没有确定腐蚀的情况下也增加了测量复杂性/破坏/修复/成本。 教导了一种确定没有电接触的钢筋状态的方法。

公开(公告)号：US07958788B2

公开(公告)日：2011-06-14

申请号：US12064680

申请日：2006-08-25

Applicant: Michael William Ford

Inventor： Michael William Ford

IPC: G01L1/00

CPC classification number: G01L1/10 ,  G01L1/162 ,  G01P15/097

Abstract: A force sensor (10) is forced from a vibrating beam (11), an excitation piezoelectric device (12) to cause a vibration in the beam at its resonate frequency and a measurement piezoelectric device (12) to measure the frequencies being indication of the force applied to the beam (11). The excitation and measurement piezoelectric devices (12) are attached to the beam adjacent to each other at one end of the beam (11).

Abstract translation: 迫使力传感器（10）从振动梁（11），激励压电装置（12）以其谐振频率引起振动，测量压电装置（12）测量频率是指示 施加到梁（11）上的力。 励磁和测量压电装置（12）在梁（11）的一端附接到彼此相邻的梁。

公开(公告)号：US20050005676A1

公开(公告)日：2005-01-13

申请号：US10651338

申请日：2003-08-28

Applicant: Ed Crawley ,  Mark Lundstrom ,  Brett Masters ,  Alok Srivastava ,  Martin Schmidt ,  Michael Miller

Inventor： Ed Crawley ,  Mark Lundstrom ,  Brett Masters ,  Alok Srivastava ,  Martin Schmidt ,  Michael Miller

IPC: G01N5/02 ,  B81B3/00 ,  B81C1/00 ,  G01L1/10 ,  G01N27/00 ,  G01N29/02

CPC classification number: G01N29/036 ,  B81B3/0089 ,  B81B2201/0214 ,  B82Y30/00 ,  B82Y35/00 ,  B82Y40/00 ,  G01L1/10 ,  G01N2291/0257 ,  G01N2291/0427

Abstract: The disclosed sensor chip includes a substrate and a moving member coupled to the substrate and disposed for movement relative to the substrate. The moving member moves relative to the substrate in a first direction and in a second direction in response to movement of the substrate. The first direction is different than the second direction. The moving member includes a plurality of receptors. The receptors are configured for selectively binding to a first measurand.

Abstract translation: 所公开的传感器芯片包括衬底和耦合到衬底并被设置为相对于衬底移动的移动构件。 移动构件响应于衬底的移动而在第一方向和第二方向上相对于衬底移动。 第一方向与第二方向不同。 移动构件包括多个受体。 受体被配置为选择性地结合第一被测量。

公开(公告)号：US5088334A

公开(公告)日：1992-02-18

申请号：US130713

申请日：1987-12-08

Applicant: Johannes Wirth

Inventor： Johannes Wirth

IPC: G01L1/10 ,  G01L1/26

CPC classification number: G01L1/10

Abstract: A dynamometer comprising a pair of similar leaf springs (4 and 5), lying in approximately the same plane, and at least one additional leaf spring (24). The outer part of the additional leaf spring (24) and any other supplementary leaf springs (6, 7, 19, and 20) replacing the single leaf spring and being fastened to the frame (1) and the inner part being fstened to the middle block (8). The leaf springs (6, 7, and 24) lie in a plane approximately parallel to that of the first pair of leaf springs (4 and 5), while the supplementary leaf springs (19 and 20) lie in the same plane as the first pair of leaf springs (4 and 5). An elastic rod (9 and 10) is attached to the middle of each of the leaf springs (4 and 5), respectively, and a force-measuring device (11) is located between these rods. The force being measured is exerted perpendicularly to the planes of the leaf springs (4 through 7, 19, 20, and 24) on the middle block (8) as a compressive or tractive force, and the middle block is displaced in a parallel direction by the leaf springs. At the same time, the rods (9 and 10) are either spread apart or forced closer together, and the force-measuring device (11) is affected accordingly.

Abstract translation: 一种测力计，其包括位于大致相同的平面中的一对类似的板簧（4和5）以及至少一个附加的板簧（24）。 附加板簧（24）的外部部分和任何其他补充板弹簧（6,7,19和20）替代单个板簧并被紧固到框架（1）上，并且内部部分被压到中间 块（8）。 板簧6,7和24位于与第一对板弹簧（4和5）大致平行的平面上，辅助板簧（19和20）位于与第一 一对板簧（4和5）。 弹性杆（9和10）分别安装在每个板簧（4和5）的中部，并且力测量装置（11）位于这些杆之间。 被测量的力作为压缩或牵引力垂直于中间块（8）上的板簧（4至7,19,20和24）的平面施加，中间块沿平行方向移位 由板簧。 同时，杆（9和10）分开或强制靠近在一起，并且力测量装置（11）相应地受到影响。

公开(公告)号：US4929860A

公开(公告)日：1990-05-29

申请号：US194806

申请日：1988-05-17

Applicant: Rand H. Hulsing, II ,  Mitchell Novack

Inventor： Rand H. Hulsing, II ,  Mitchell Novack

IPC: G01L1/10 ,  G01P15/02 ,  H01L29/84 ,  H01L41/09 ,  H01L41/22

CPC classification number: G01L1/10 ,  G01L9/0022 ,  G01P15/097 ,  H01L41/047

Abstract: A technique is described for tailoring the configuration of electrodes on a piezoelectric beam such that the tendency of the beam to vibrate in a predetermined flexure mode is enhanced. The mode has a predetermined longitudinal strain versus longitudinal position profile. At least two electrodes are mounted on the beam, and the configuration of at least one electrode varies as a function of longitudinal position, such that when a voltage difference is applied between the electrodes, the longitudinal force produced by the electrodes, as a function of longitudinal position, approximates the longitudinal strain versus longitudinal position profile. The configuration may be varied by varying the width of the electrode or the position of the electrode on the underlying beam surface.

Abstract translation: 描述了一种技术来定制压电梁上的电极的配置，使得光束以预定的弯曲模式振动的趋势被增强。 该模式具有预定的纵向应变与纵向位置分布。 至少两个电极安装在梁上，并且至少一个电极的构型随着纵向位置的变化而变化，使得当在电极之间施加电压差时，由电极产生的纵向力作为 纵向位置近似纵向应变与纵向位置分布。 可以通过改变电极的宽度或在下面的光束表面上的电极的位置来改变配置。