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    Vibrating beam force transducer with A-frame beam root and frequency adjusting means
    61.
    发明授权
    Vibrating beam force transducer with A-frame beam root and frequency adjusting means 失效
    振动光束力传感器，具有A帧光束根和频率调节装置

    公开(公告)号：US4658175A

    公开(公告)日：1987-04-14

    申请号：US844479

    申请日：1986-03-26

    Applicant: William C. Albert

    Inventor： William C. Albert

    IPC: G01L1/10 ,  G01L1/16 ,  G01P15/097 ,  G01P15/10 ,  H01L41/08

    CPC classification number: G01P15/097 ,  G01L1/162 ,  Y10S73/04

    Abstract: A vibrating beam force transducer includes a piezoelectric beam structure supported at first and second ends, and an oscillator for inducing a vibration in the piezoelectric beam. To permit adjusting the bias frequency of the beam, an adjustment mass is formed at the center of the beam, the adjustment mass made of piezoelectric material. Part of the adjustment mass can be broken off to adjust the bias frequency. The first and second ends are attached to the a support structure by first and second legs at each end of the beam, the legs having an angle therebetween, thereby forming an A-frame mount.

    Abstract translation: 振动束力传感器包括在第一和第二端支撑的压电梁结构，以及用于在压电梁中引起振动的振荡器。 为了允许调整光束的偏置频率，在光束的中心处形成调节质量，即由压电材料制成的调节质量。 调整质量的一部分可以被分解以调整偏置频率。 第一和第二端通过第一和第二腿在梁的每个端部附接到支撑结构，腿部之间具有一个角度，从而形成A框架安装件。

    Monolithic oscillating crystal transducer systems
    62.
    发明授权
    Monolithic oscillating crystal transducer systems 失效
    单片振荡晶体振子系统

    公开(公告)号：US4485323A

    公开(公告)日：1984-11-27

    申请号：US575190

    申请日：1984-01-30

    Applicant: James P. Corbett

    Inventor： James P. Corbett

    IPC: G01L1/16 ,  G01L9/00 ,  H01L41/08

    CPC classification number: G01L1/162 ,  G01L9/0022

    Abstract: A force and pressure transducer comprises a plate-like crystal. Two separate portions of the crystal are maintained in oscillation at separate frequencies by a circuit. The force to be measured, is applied by a seating to a part of the crystal edge such that compression in one of the oscillating portions causes the frequency of that oscillating portion to change substantially whereas the frequency of the other portion changes only minimally.In the past it has been difficult to manufacture crystals in which the frequency versus temperature response of each of the two oscillating portions was sufficiently well matched to permit the difference frequency between the portions to be used as the instrument output signal.This invention resides in the application of a second fixed force by a spring via a seating to a second part of the crystal edge in such a way as to influence the frequency of oscillation of this second portion. In so doing the second seating can be adjusted to cause the frequency change due to temperature of the second oscillating portion to become as nearly as possible matched to the frequency versus temperature response of the first oscillating portion of the crystal thus providing a frequency change derived by computing the difference frequency between the two portions. This difference frequency forms the instrument output and responds only to the force applied to the instrument and not to the ambient temperature of the instrument.

    Abstract translation: 力和压力传感器包括板状晶体。 晶体的两个分开的部分通过电路保持在分开的频率的振荡。 要测量的力通过座位施加到晶体边缘的一部分，使得在其中一个振荡部分中的压缩导致该振荡部分的频率基本上改变，而另一部分的频率仅最小化地改变。 在过去，制造晶体是困难的，其中两个振荡部分中的每一个的频率对温度响应足够好地匹配，以允许要用作仪器输出信号的部分之间的差频。 本发明在于通过弹簧将第二固定力施加到晶体边缘的第二部分，以影响该第二部分的振荡频率。 在这样做时，可以调整第二座位以使得由于第二振荡部分的温度引起的频率变化变得尽可能接近晶体的第一振荡部分的频率对温度响应，从而提供由 计算两个部分之间的差分频率。 该差异频率形成仪器输出，仅响应于施加到仪器的力而不响应仪器的环境温度。

    Mounting system for applying forces to load-sensitive resonators
    63.
    发明授权
    Mounting system for applying forces to load-sensitive resonators 失效
    用于向负载敏感谐振器施加力的安装系统

    公开(公告)号：US4384495A

    公开(公告)日：1983-05-24

    申请号：US207694

    申请日：1980-11-17

    Applicant: Jerome M. Paros

    Inventor： Jerome M. Paros

    IPC: G01L1/10 ,  G01L1/16

    CPC classification number: G01L1/162 ,  Y10S73/01

    Abstract: A mounting structure for double-bar resonators to ensure symmetrical loading of the resonator responsive to external forces. In one embodiment, the resonator is connected to a pair of mounting pads through compliant coupling members. The coupling members allow longitudinal, force-induced displacements of the mounting pads to load the resonator while making the resonator insensitive to spurious transverse displacements of the mounting pads. In another embodiment, a force is applied to a load-sensitive, double-bar resonator through a force-transmitting bar which is mounted on an elongated flexure hinge. The hinge is compliant about an axis of rotation which is perpendicular to the longitudinal axis of the resonator so that the hinge attenuates any force component acting perpendicular to the longitudinal axis of the resonator which would otherwise non-symmetrically load the resonator.

    Abstract translation: 用于双杆谐振器的安装结构，以确保响应于外力的谐振器的对称负载。 在一个实施例中，谐振器通过柔性耦合构件连接到一对安装衬垫。 联接构件允许安装垫的纵向，力引起的位移来加载谐振器，同时使谐振器对安装焊盘的杂散横向位移不敏感。 在另一个实施例中，通过安装在细长弯曲铰链上的力传递杆将力施加到负载敏感的双杆谐振器。 铰链围绕垂直于谐振器的纵向轴线的旋转轴线顺从，使得铰链衰减垂直于谐振器的纵向轴线作用的任何力分量，否则其将非对称地加载谐振器。

    Longitudinal isolation system for flexurally vibrating force transducers
    64.
    发明授权
    Longitudinal isolation system for flexurally vibrating force transducers 失效
    用于弯曲力传感器的纵向隔离系统

    公开(公告)号：US4321500A

    公开(公告)日：1982-03-23

    申请号：US103918

    申请日：1979-12-17

    Applicant: Jerome M. Paros ,  Donald W. Busse

    Inventor： Jerome M. Paros ,  Donald W. Busse

    IPC: G01H11/08 ,  G01L1/10 ,  G01L1/16 ,  G01L9/00 ,  G01P15/097 ,  G01P15/10 ,  H01L41/08

    CPC classification number: G01P15/097 ,  G01L1/106 ,  G01L1/162 ,  G01L9/0013 ,  G01L9/0022

    Abstract: A system for isolating the mounting pads of a vibrating beam or tuning fork force transducers from longitudinal vibrations generated by transverse vibrations of the beam or tuning fork tines which extend between the mounting pads. The system includes an arrangement of longitudinally resilient support links and masses that flex responsive to change in the length of the beam or tines as the beam or tines vibrate transversely. The support links and masses thus isolate the mounting pads from the longitudinally vibrations of the beam or tuning fork tines while allowing transmission of forces applied between the mounting pads which vary the force dependent resonant frequency of the beam or tuning fork.

    Abstract translation: 用于隔离振动梁或音叉的安装垫的系统将换能器从在安装垫之间延伸的梁或音叉齿的横向振动产生的纵向振动中。 该系统包括纵向弹性的支撑连杆和质量的布置，当束或尖齿横向振动时，该弹性支撑连杆和质量块响应于梁或尖齿的长度的变化而变形。 支撑链节和质量块将安装垫与梁或音叉齿的纵向振动隔离，同时允许施加在安装垫之间的力的传递，其改变梁或音叉的力依赖共振频率。

    Determination of resonant frequency and quality factor for a sensor system
    68.
    发明授权
    Determination of resonant frequency and quality factor for a sensor system 有权

    公开(公告)号：US11868540B2

    公开(公告)日：2024-01-09

    申请号：US17096598

    申请日：2020-11-12

    Applicant: Cirrus Logic International Semiconductor Ltd.

    Inventor： Ryan Hellman

    IPC: G06F3/02 ,  G01L1/14 ,  G01L1/00 ,  G01L1/18 ,  G01L1/16

    CPC classification number: G06F3/0202 ,  G01L1/005 ,  G01L1/14 ,  G01L1/162 ,  G01L1/183

    Abstract: A method for determining sensor parameters of an actively-driven sensor system may include obtaining as few as three samples of a measured physical quantity versus frequency for the actively-driven sensor system, performing a refinement operation to provide a refined version of the sensor parameters based on the as few as three samples and based on a linear model of an asymmetry between slopes of the measured physical quantity versus frequency between pairs of the as few as three samples, iteratively repeating the refinement operation until the difference between successive refined versions of the sensor parameters is below a defined threshold, and outputting the refined sensor parameters as updated sensor parameters for the actively-driven sensor system.

    Method, System, Device and Medium for Online Monitoring of Plane Stress Field without Baseline Data Based on Piezoelectric Transducer Array
    70.
    发明公开
    Method, System, Device and Medium for Online Monitoring of Plane Stress Field without Baseline Data Based on Piezoelectric Transducer Array 审中-公开

    公开(公告)号：US20230228632A1

    公开(公告)日：2023-07-20

    申请号：US17704090

    申请日：2022-03-25

    Applicant: Harbin Institute of Technology

    Inventor： Weijia Shi ,  Bo Zhao ,  Jiubin Tan

    IPC: G01L1/16 ,  G01L5/167 ,  G01L5/173

    CPC classification number: G01L1/162 ,  G01L5/167 ,  G01L5/173

    Abstract: The disclosure provides a method, system, device and medium for online monitoring of a plane stress field without baseline data based on a piezoelectric transducer array. Since Lamb waves have complex multi-mode characteristics, a suitable excitation frequency needs to be selected according to geometric dimensions of the structure to be measured, and then, only low-order mode Lamb waves are excited inside the measured structure to avoid serious waveform aliasing. For isotropic measured objects, anisotropic characteristics will be generated under the action of pre-stresses, that is, the propagation velocities of ultrasonic waves in all directions are different, but there is a linear relationship between velocity changes in different propagation directions and stresses. Therefore, there is still a linear relationship between the difference of velocity changes in different propagation directions and the stress. According to this characteristic, a characterization method of an absolute stress field without baseline data can be implemented. The method of the disclosure can make full use of the low attenuation characteristics of the Lamb waves to realize online monitoring of the plane stress field with a large coverage area.

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