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1.发明申请公开(公告)号：US20240418597A1
公开(公告)日：2024-12-19
申请号：US18597842
申请日：2024-03-06
Inventor： Zhifeng WANG , Zhongfeng ZHANG , Licheng ZHOU , Da WANG , Aijun CHEN , Haolei WANG , Xin FENG
IPC: G01M7/02
Abstract: Disclosed is a damping test system for a wood-based material based on full sampling of a free vibration curve, comprising: a damping test device, a carrying space, a processor, and a storage module. The processor is configured to generate a test scheme and execute a test corresponding to the test scheme; obtain a labeled test scheme; determine, based on the labeled test scheme, test data of the labeled test scheme; determine, based on the test data, whether an extended test is added; in response to determining that the extended test is added, adjust, based on the test data obtained from the storage module, a sampling frequency of a data monitoring module, and determine a test parameter of a newly added extended test; generate, based on the test parameter of the newly added extended test and an adjusted sampling frequency, a new test scheme.
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公开(公告)号：US20240403498A1
公开(公告)日：2024-12-05
申请号：US18731449
申请日：2024-06-03
Applicant: Harbin Institute of Technology
Inventor： Chenglong Yu , Tianyi Li , Bin Li , DeHai Li , Bo Zhao
Abstract: Provided is a design method for a support structure of a large-scale vibrational excitation platform. The present invention designs a dimension of a support structure matching a dimension of the vibrational excitation platform, selects appropriate materials to guarantee structural stiffness, performs simulation and verification of finite elements to verify a natural frequency and stress deformation of the support structure, breaks down the support structure to facilitate processing, transportation and assembly, and optimizes structural parameters to enhance stability and stiffness of the support structure. The support structure designed using the design method in the present invention features strong stability, simple structure, high natural frequency and easy to mount. The support structure is assembled by means of welding and threaded connections, and is reinforced with reinforcement plates at important parts, such that structural stiffness and strength of the support structure are guaranteed.
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公开(公告)号：US20240393206A1
公开(公告)日：2024-11-28
申请号：US18694776
申请日：2021-10-07
Applicant: Chevron U.S.A. Inc. , Triad National Security, LLC
Inventor： Alison Haley Root , Eric Brian Flynn , Adam Joseph Wachtor , Robert Kwan Meng Seah , Ian Thomas Cummings , Rodney F. Deschamps , Erica Marie Jacobson
IPC: G01M7/02
Abstract: Different frequencies for steady state excitation of the structure may be tested by sweeping over an excitation frequency range. Partial measurements of the responses in the structure at different excitation frequencies may be used to select excitation frequencies, and the selected excitation frequencies may be used to inspect the structure.
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公开(公告)号：US20240385072A1
公开(公告)日：2024-11-21
申请号：US18574641
申请日：2021-11-23
Applicant: SUZHOU SUSHI TESTING GROUP CO., LTD.
Inventor： Jiuzhao SHENG
IPC: G01M7/02
Abstract: The present invention relates to a method for picking up signals from an impact vibration sensor, which comprises: sampling impact vibration signal; averaging and identifying a maximum value of the impact vibration signal; determining whether the maximum value is located in the middle of the sampling data; if yes, determining whether sampling data on both sides of the maximum value exhibit monotonic increase or monotonic decrease and values are approximately the same, and determining appropriate sampling data is collected if three requirements are all met; if not, adjusting sampling data until requirements are met. Processing signals collected by the impact vibration sensor in the time domain allows for obtaining impact vibration signals that meet requirements. The accuracy of the signals is high, enabling real-time signal acquisition. Additionally, corroborating the results of time-domain processing through frequency-domain analysis enhances the reliability and accuracy of the collected signals.
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公开(公告)号：US12146543B2
公开(公告)日：2024-11-19
申请号：US18497408
申请日：2023-10-30
Applicant: Raytheon Company
Inventor： Ashley Waldron , Brian Hochheim , Stephane Joubert
Abstract: A shock isolator is arranged between two automated coupler parts in a vibration testing unit. When the coupler parts are engaged and coupled during vibration testing of a component, the shock isolator is disabled, and when the coupler parts are disengaged and decoupled after vibration testing, the shock isolator is activated to absorb excess shock energy and prevent shock transfer between the coupler parts that would damage the test component. The shock isolator includes a bushing that is inserted in a lower part of the two automated coupler parts and a compressive fit rod that is press-fit into the bushing. The bushing has a chamfered volume and the compressive fit rod has a corresponding compressible volume that is displaced into the chamfered volume to disable the shock isolator. After vibration testing, the compressive fit rod is expandable to a regular shape to activate the shock isolator.
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Patent Agency Ranking
公开(公告)号：US20240353287A1
公开(公告)日：2024-10-24
申请号：US18684852
申请日：2021-08-25
Applicant: Mitsubishi Electric Corporation
Inventor： Norihiko HANA , Masao AKIYOSHI , Masaki UMEDA , Kenji AMAYA , Takuya IWAMOTO
Abstract: An inspection device includes: a data recording unit which records, in advance, change of a natural frequency caused when a rigidity of a supported part of an inspection target object and a damage size of the inspection target object are changed; a measurement unit which measures vibration response of the vibration-applied inspection target object; and an estimation unit which estimates the rigidity of the supported part of the inspection target object and the damage size of the inspection target object, simultaneously, on the basis of change of the natural frequency between a natural frequency of the inspection target object calculated from the vibration response and a natural frequency obtained by measuring the inspection target object whose damage state has already been known, and the change of the natural frequency recorded in the data recording unit.
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公开(公告)号：US20240353286A1
公开(公告)日：2024-10-24
申请号：US18640603
申请日：2024-04-19
Applicant: HERC BUILD LLC
Inventor： Brian DWIGHT , Craig PRATT , David DWIGHT
Abstract: The present disclosure relates to a system for detecting object resonance caused by vortex shedding as well as deviations from vertical and electrical storm activity and related phenomena: (a) a housing comprising an inside surface and an outside surface, and configured to encapsulate components of the system; (b) a plurality of sensors comprising an accelerometer, a gyroscope, a pressure sensor, an anemometer, a global positioning system, and electrostatic sensors; (c) a control module comprising processor being operatively connected to the plurality of sensors and configurable to: (i) receive signals from the plurality of sensors; (ii) perform an analysis of the signals to determine one of the presence and absence of object resonance caused by vortex shedding and deviations from vertical; (iii) generate at least one result based on the analysis of the signals; and (iv) transmit the result to a user interface device; and (d) a power supply electronically connected to and configured to provide electrical power to each of the plurality of sensors and the processor.
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公开(公告)号：US20240344923A1
公开(公告)日：2024-10-17
申请号：US18751431
申请日：2024-06-24
Applicant: IHI Corporation
Inventor： Kensuke SHIOMI , Teruyoshi OTOYO , Takaomi INADA
Abstract: A vibration test jig includes: a base installed on a vibration table, including a mounting surface on which the end of the test body is mounted; a top plate placed on the base with a gap therebetween, including a slot having an inner surface that presses the end of the test body toward the mounting surface; a reinforcing portion placed along the slot; and pressing members arranged along the slot and configured to press the reinforcing portion toward the base. A thickness of the reinforcing portion varies along the slot in accordance with a magnitude of a fluctuating load generated in the top plate during vibration thereof.
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公开(公告)号：US20240319040A1
公开(公告)日：2024-09-26
申请号：US18435173
申请日：2024-02-07
Applicant: ROLLS-ROYCE PLC
Inventor： Matthew DE BRETT , Christoph W. SCHWINGSHACKL
IPC: G01M7/02
CPC classification number: G01M7/025
Abstract: A method of analysing a non-contact excitation system for a spin rig includes, calculating a magnetic field per test piece element, integrating the magnetic field over the test piece element surface to get a force per test piece element, performing a Fourier analysis of the forces acting on the test piece element as it moves past the periodic array of exciter elements, calculating the damping added to the test piece element due to magnetic induction, calculating a vibration response of the test piece element as it moves past the stationary array of exciter elements, calculating a transient response of the test piece element where the stationary array of exciter elements is rapidly moved away from the test piece elements, and using the calculated transient response of the test piece element to calculate a required electromagnetic holding force for the array of exciter elements.
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公开(公告)号：US20240295459A1
公开(公告)日：2024-09-05
申请号：US18437773
申请日：2024-02-09
Applicant: University of Maryland, Baltimore County
Inventor： Weidong ZHU , Linfeng LYU
Abstract: A one-dimensional (1D) and two-dimensional (2D) scan scheme for a tracking continuously scanning laser Doppler vibrometer (CSLDV) system to scan the whole surface of a rotating structure excited by a random force. A tracking CSLDV system tracks a rotating structure and sweep its laser spot on its surface. The measured response of the structure using the scan scheme of the tracking CSLDV system is considered as the response of the whole surface of the structure subject to random excitation. The measured response can be processed by operational modal analysis (OMA) methods (e.g., an improved lifting method, an improved demodulation method, an improved 2D demodulation method). Damped natural frequencies of the rotating structure are estimated from the fast Fourier transform of the measured response. Undamped full-field mode shapes are estimated by multiplying the measured response using sinusoids whose frequencies are estimated damped natural frequencies.
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