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21.发明申请公开(公告)号：US20210372967A1
公开(公告)日：2021-12-02
申请号：US17333148
申请日：2021-05-28
发明人： Gongtian Shen , Yongna Shen , Wenjun Zhang
摘要： A magneto acoustic emission detection method for fatigue damage of ferromagnetic metal components: First, generating an excitation magnetic field by using a sine wave voltage signal, gradually increasing a loading voltage until a magneto acoustic emission signal of a bimodal envelope with an obvious tail peak is acquired, and taking a corresponding voltage peak value as a reference voltage; second, generating an excitation magnetic field by using a square wave voltage signal equal to or higher than a reference voltage, and acquiring a magneto acoustic emission signal with a T-shaped envelope; and third, calculating the average value of peak-to-peak values of the magneto acoustic emission signal in multiple periods to serve as a characteristic parameter, and enabling the characteristic parameter to have inflection point change along with the development of the initiation and expansion of the fatigue crack, and giving a timely early warning for the failure of the component.
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公开(公告)号：US11077762B2
公开(公告)日：2021-08-03
申请号：US16838701
申请日：2020-04-02
发明人： Hanspeter Widmer , Markus Bittner , Lukas Sieber , Marcel Fischer
IPC分类号： H01F38/14 , G01D5/20 , B60L53/124 , B60L3/00 , B60L3/04 , H02J50/12 , H02J50/60 , H04B5/00 , B60L53/30 , B60L53/37 , B60L53/63 , B60L50/16 , B60L53/36 , B60L50/51 , B60L50/60 , B60L55/00 , B60L53/65 , B60L53/68 , B60L53/122 , B60L53/126 , B60L53/12 , G01N27/72 , G01V3/10
摘要： This disclosure provides systems, methods and apparatus for detecting foreign objects. In one aspect an apparatus for detecting a presence of an object is provided. The apparatus includes a resonant circuit having a resonant frequency. The resonant circuit includes a sense circuit including an electrically conductive structure. The apparatus further includes a coupling circuit coupled to the sense circuit. The apparatus further includes a detection circuit coupled to the sense circuit via the coupling circuit. The detection circuit is configured to detect the presence of the object in response to detecting a difference between a measured characteristic that depends on a frequency at which the resonant circuit is resonating and a corresponding characteristic that depends on the resonant frequency of the resonant circuit. The coupling circuit is configured to reduce a variation of the resonant frequency by the detection circuit in the absence of the object.
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公开(公告)号：US20210207758A1
公开(公告)日：2021-07-08
申请号：US17142760
申请日：2021-01-06
申请人： TDW Delaware, Inc.
发明人： Roger L. Poe , Ed Maynard , Joseph Alan Morton
摘要： A re-settable pipeline gauging tool (10) of this disclosure includes a cylindrical tool body (11) that includes a deformable portion (13) with a plurality of sensors (25) located near or on an external circumferential surface (12) of the deformable portion. A sealed unit (60) contains a corresponding signal source (25). Pipeline gauging relies upon the compressibility and elasticity inherent in the deformable portion as it encounters anomalies in pipeline geometry and moves between a first size and a second size, the signal strength of the source detected by the sensors changing as a result. The sensors may be arrayed in a circumferential band (47) about the deformable portion or along its length. In some embodiments, the sensors and source are magnetic or acoustic (e.g., transceivers or radar integrated chips). In other embodiments, the sensors and source are light or fiber optic.
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公开(公告)号：US11054392B2
公开(公告)日：2021-07-06
申请号：US16040801
申请日：2018-07-20
IPC分类号： G01N27/72 , A61B5/05 , A61B5/0515 , G01R33/12 , G01R33/02 , G01R33/00 , A61B5/00 , G01R33/10
摘要： A magnetic particle imaging apparatus includes magnets [106,107] that produce a gradient magnetic field having a field free region (FFR), excitation field electromagnets [102,114] that produce a radiofrequency magnetic field within the field free region, high-Q receiving coils [112] that detect a response of magnetic particles in the field free region to the excitation field. Field translation electromagnets create a homogeneous magnetic field displacing the field-free region through the field of view (FOV) allowing the imaging region to be scamled to optimize scan time, scanning power, amplifier heating, SAR, dB/dt, and/or slew rate. Efficient multi-resolution scanning techniques are also provided. Intermodulated low and radio-frequency excitation signals are processed to produce an image of a distribution of the magnetic nanoparticles within the imaging region. A single composite image is computed using deconvolution of multiple signals at different harmonics.
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公开(公告)号：US20210156715A1
公开(公告)日：2021-05-27
申请号：US16698751
申请日：2019-11-27
申请人： Zircon Corporation
发明人： John Robert STAUSS
摘要： Aspects of the present invention include a system and method for differentiating one or more objects detected behind an opaque surface, comprising, a plurality of sensors, controlled by one or more processors, configured to collect in parallel, sensor data of the one or more objects behind an opaque surface, the one or more processors are configured to analyze the sensor data to identify estimated regions of the one or more objects behind the opaque surface, the one or more processors are further configured to differentiate the estimated regions of the one or more objects behind the opaque surface, and, the one or more processors are further configured to inform a user, via a user interface, of the one or more objects within the estimated regions behind the opaque surface.
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公开(公告)号：US10981375B2
公开(公告)日：2021-04-20
申请号：US16576409
申请日：2019-09-19
IPC分类号： G01N21/17 , G01N21/85 , G01N27/02 , G01N27/08 , G01N27/22 , G01N27/72 , G01N27/74 , G01R27/26 , B33Y50/02 , B29C35/08 , B33Y10/00 , B33Y30/00 , B29C64/112 , B29C64/209 , B29C64/00 , B29C64/386 , B29C64/106 , B29C64/393 , B29K105/00 , G01N21/84
摘要： In the additive manufacturing process, a monitored or controlled mixture of materials is deposited to form an additive manufactured product by delivering the mixture of materials through a material flow path while using an excitation source to introduce electromagnetic energy into the material flow path using a circuit element having inductive or capacitive reactance disposed adjacent the material ejecting orifice. The excitation source produces an electromagnetic field condition within the material flow path that is responsive to at least one of the permeability and permittivity properties of a space within the material flow path. A sensing means coupled electrically or magnetically to the excitation means is responsive to the electromagnetic field condition and provides at least one control parameter based on the electromagnetic field condition that may be used to control the composition of the mixture of materials by adjusting proportions of constituent materials.
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公开(公告)号：US20210047682A1
公开(公告)日：2021-02-18
申请号：US16591232
申请日：2019-10-02
IPC分类号： C12Q1/6869 , G01N33/487 , G01N27/72
摘要： Method of utilizing a nanochannel in combination with at least one magnetic sensor for detecting (e.g., identifying) molecules, cells, and other analytes. Particularly, the method includes bringing molecules, labeled with magnetic nanoparticles (MNPs), in close proximity to the magnetic sensor to identify the molecules via an output signal from the magnetic sensor. The method is particularly suited for identifying nucleotides of DNA and RNA strands.
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公开(公告)号：US10849527B2
公开(公告)日：2020-12-01
申请号：US15698372
申请日：2017-09-07
摘要： According to one embodiment, a magnetic sensor includes a first sensor element and a first interconnect. The first sensor element includes a first magnetic layer, a first opposing magnetic layer, and a first nonmagnetic layer provided between the first magnetic layer and the first opposing magnetic layer. A first magnetization of the first magnetic layer is aligned with a first length direction crossing a first stacking direction from the first magnetic layer toward the first opposing magnetic layer. At least a portion of the first interconnect extends along the first length direction. The first interconnect cross direction crosses the first length direction and is from the first sensor element toward the portion of the first interconnect. A first electrical resistance of the first sensor element changes according to an alternating current flowing in the first interconnect and a sensed magnetic field applied to the first sensor element.
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公开(公告)号：US20200371080A1
公开(公告)日：2020-11-26
申请号：US16990716
申请日：2020-08-11
申请人： IDEACURIA INC.
摘要： A system and method for monitoring a characteristic of a material by measuring electrical or magnetic properties of the material. The system includes a material monitoring device having at least one electrode and at least one magnetic coil, and is in communication with a machine learning model trained to recognize characteristics of the material based on electrical and magnetic properties of the material. The material can be stimulated with an electrical stimulus or stimulating magnetic field, and an electrical response signal or magnetic response signal can be measured. Applications to monitoring water quality, beverages, foodstuffs, and other characteristics of materials is discussed.
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公开(公告)号：US10823788B2
公开(公告)日：2020-11-03
申请号：US16043396
申请日：2018-07-24
发明人： Yuki Endo , Aritomo Kikuchi , Shigeo Nakamura
IPC分类号： G01N27/72 , G01R33/00 , G01R33/09 , G01R33/035
摘要： Provided is a magnetic sensor testing device capable of preventing performance of an electromagnet from greatly changing due to heat applied to a magnetic sensor.A magnetic sensor testing device includes electromagnets 50 and 60 that apply a magnetic field to a magnetic sensor, temperature regulators 30 and 40 that regulate a temperature of the magnetic sensor by locally applying heat to the magnetic sensor, and a controller that controls the electromagnets 50 and 60 and the temperature regulators 30 and 40, in which the controller tests the magnetic sensor in a state in which the magnetic field is applied to the magnetic sensor by the electromagnets 50 and 60 while the heat is applied to the magnetic sensor by the temperature regulators 30 and 40.
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