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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
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.
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公开(公告)号：US11366003B1
公开(公告)日：2022-06-21
申请号：US16573603
申请日：2019-09-17
Applicant: Kwang Yul Kim
Inventor： Kwang Yul Kim
Abstract: A method, apparatus and system are disclosed for the measuring directly in units of force or mass huge load of form 10 to 1000 tons or more. The system includes a unique load carrying member to which the huge load is applied and based on readings of three types of ultrasonic waves and the change in the dimensions of the load carrying member it is able to directly calculate the force in units of newtons or units of mass in kilograms of the applied load.
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公开(公告)号：US11353371B2
公开(公告)日：2022-06-07
申请号：US17432341
申请日：2020-11-06
Applicant: FDH INFRASTRUCTURE SERVICES, LLC
Inventor： Joshua Scott , Armita Mohammadian , David Milligan
Abstract: The present disclosure provides systems, methods, and apparatuses for estimating tension in post-tensioned rods, such as anchor rods that support structural steel to concrete. A method of estimating tension in a target post-tension rod may include selecting a plurality of post-tensioned rods and modeling tension for the plurality of post-tensioned rods as a function of frequency differences between a first and a second modal frequency and cantilever length of each rod. The method may further include measuring the length of a cantilever of the target post-tensioned rod, determining first and second modal frequencies of the target post-tensioned rod, and determining a frequency difference between the first and second modal frequencies. The method may further include estimating tension in the target post-tensioned rod based on at least the model.
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84.发明授权公开(公告)号：US11287334B1
公开(公告)日：2022-03-29
申请号：US16445583
申请日：2019-06-19
Inventor： Stephen Eckel , James Fedchak , Thomas Purdy , Robinjeet Singh
Abstract: An optomechanical pressure-measurement system measures pressure in the range of 10−6 Pa-10−2 Pa by measuring various properties of a vibrational mode of an ultra-thin membrane member. With independent measurements of the thickness and density of the membrane, in addition to the measured vibration mode properties, the system can operate as a primary pressure sensor. The membrane member is mounted on a vibration-isolated mount and is excited by a drive force. A laser beam impinges on the excited membrane, and an optical phase detector detects the amplitude of the oscillations, as well as parameters of the laser beam affected by the membrane vibration. In one embodiment, a mechanical damping is computed based on the amplitude or frequency shift (depending on the pressure range), and the pressure based on the ring-down time of the membrane vibration mode.
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公开(公告)号：US11262251B2
公开(公告)日：2022-03-01
申请号：US16494925
申请日：2018-03-09
Applicant: DIGI SENS AG
Inventor： Olivier Stuker
Abstract: The invention relates to a load detection unit having a spring-elastic load carrier assembly for receiving the load (10) and a sensor (3) for the deformation of the load carrier assembly, which occurs under the load (10) that is to be detected, wherein a deformation transmission unit (6) is operatively arranged between the load carrier assembly and the sensor (3). A method, in which additionally a deformation transmission unit is used, is thus provided, which during operation picks up the deformation of the load carrier assembly and transmits it to the sensor as a changed force/path load.
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Patent Agency Ranking
86.发明申请公开(公告)号：US20210404889A1
公开(公告)日：2021-12-30
申请号：US17363400
申请日：2021-06-30
Applicant: SEIKO EPSON CORPORATION
Inventor： Chikara KOJIMA
Abstract: A piezoelectric element device includes: a substrate including a plurality of vibrating portions having a first vibrating portion and a second vibrating portion; a piezoelectric element group in which a plurality of piezoelectric elements having a first piezoelectric element and a second piezoelectric element provided in the plurality of vibrating portions are coupled in parallel to each other; a plurality of load detectors having a first load detector including the first vibrating portion and the first piezoelectric element provided in the first vibrating portion and a second load detector including the second vibrating portion and the second piezoelectric element provided in the second vibrating portion; and a resin layer covering the piezoelectric element group. The first load detector resonates at a first resonance frequency, the second load detector resonates at a second resonance frequency, the first resonance frequency and the second resonance frequency are different from each other, the first resonance frequency changes in accordance with a load applied to the first load detectors via the resin layer, the second resonance frequency changes in accordance with a load applied to the second load detectors via the resin layer, and a first resonance frequency change range, which are changeable range of the first resonance frequency, and a second resonance frequency change range, which are changeable range of the second resonance frequency, do not overlap each other.
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87.发明授权公开(公告)号：US11112350B2
公开(公告)日：2021-09-07
申请号：US15781771
申请日：2016-12-06
Applicant: XYZTEC B.V [NL/NL]
Inventor： Robert John Sykes
Abstract: A method for testing a bond using a bond tester apparatus, the method comprising the steps of applying a mechanical force to the bond, determining, by a sensor component comprised by the bond tester apparatus, the applied force to the bond by measuring, by the sensor component, a displacement of the sensor component caused by the applied force and calculating, by the sensor component, the applied force on the basis of a first component which comprises a direct relationship with the measured displacement and on the basis of at least one of a second component, a third component and a fourth component.
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公开(公告)号：US11105701B2
公开(公告)日：2021-08-31
申请号：US16646335
申请日：2018-06-14
Applicant: MEIDENSHA CORPORATION
Inventor： Takao Akiyama
IPC: G01M1/10 , G01L1/10 , G01L3/02 , G01M13/025
Abstract: An input-side control device includes: a feedback controller that generates a first control input signal for eliminating the difference between a model speed signal ωm and a speed detection signal ω by using the signal difference between a higher order torque command signal Tref and an axial torque detection signal Tsh to generate the model speed signal ωm which corresponds to the rotational speed of an inertial body having a set moment of inertia Jset moving under a torque corresponding to the signal difference; a feed-forward controller that generates a second control input signal by multiplying the signal difference by k·Jdy/Jset; and a low-pass filter that generates a torque command signal Tr from a signal obtained by combining the outputs of the controllers and attenuating components at a higher frequency than a cut-off frequency fc set in the vicinity of the resonant frequency.
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公开(公告)号：US10794813B2
公开(公告)日：2020-10-06
申请号：US16237817
申请日：2019-01-02
Inventor： Sebastien Hentz , Marc Sansa Perna
IPC: G01N15/14 , G01P15/08 , G01L1/18 , G01L1/10 , G01H13/00 , H01J49/26 , G01N15/10 , H03H9/24 , G01D5/26 , H03H9/02 , G01H11/08 , G01H9/00
Abstract: Particle detection device comprising a support, a platform for receiving particles, four beams suspending the platform from the support, such that the platform can be made to vibrate, means for making said platform vibrate at a resonance frequency, means for detecting the displacement of the platform in a direction of displacement. Each beam has a length l, a width L and a thickness e and the platform has a dimension in the direction of displacement of the platform and in which in a device with out of plane mode l≥10×L and the dimension of each beam in the direction of displacement of the platform is at least 10 times smaller than the dimension of the platform in the direction of displacement.
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公开(公告)号：US20200271539A1
公开(公告)日：2020-08-27
申请号：US16646335
申请日：2018-06-14
Applicant: MEIDENSHA CORPORATION
Inventor： Takao AKIYAMA
IPC: G01M1/10 , G01M13/025 , G01M17/013 , G01L3/02 , G01L1/10
Abstract: An input-side control device includes: a feedback controller that generates a first control input signal for eliminating the difference between a model speed signal ωm and a speed detection signal ω by using the signal difference between a higher order torque command signal Tref and an axial torque detection signal Tsh to generate the model speed signal ωm which corresponds to the rotational speed of an inertial body having a set moment of inertia Jset moving under a torque corresponding to the signal difference; a feed-forward controller that generates a second control input signal by multiplying the signal difference by k·Jdy/Jset; and a low-pass filter that generates a torque command signal Tr from a signal obtained by combining the outputs of the controllers and attenuating components at a higher frequency than a cut-off frequency fc set in the vicinity of the resonant frequency.
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