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公开(公告)号：US11821804B2
公开(公告)日：2023-11-21
申请号：US17254754
申请日：2019-06-26
申请人： Trafag AG
发明人： Tobias Ettenauer , Christoph Schanz
CPC分类号： G01L25/003 , G01L1/127 , G01L3/105
摘要： To reduce a hysteresis error, the invention provides a load measurement method (12) for measuring a load in a test object (14), comprising: a) generating a magnetic field in the test object (14) by means of at least one magnetic field generating coil (Lg) to which a periodically alternating current is applied; b) detecting a magnetic field parameter which changes on the basis of a load in the test object (14), using at least one magnetic field detecting device, in order to generate a magnetic field parameter signal (51) which changes periodically according to the periodically generated magnetic field, characterized by: c) detecting the hysteresis-to-signal ratio of the magnetic field parameter signal (51) over time within one period; and d) disregarding magnetic field parameter signal values from at least one predetermined timespan within each period in which a maximum hysteresis-to-signal ratio occurs.
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公开(公告)号：US11852556B2
公开(公告)日：2023-12-26
申请号：US17941120
申请日：2022-09-09
申请人： Trafag AG
发明人： Tobias Ettenauer , Falk von Seggern
CPC分类号： G01L3/103 , G01L1/125 , G01L25/003
摘要： For more accurate load measurement, a load measuring arrangement includes a test object and a load measuring device for measuring a load on the test object. The load measuring device includes at least one magnetic field detection device for detecting a magnetic field parameter changing due to load at a measuring zone of the test object. The test object is work-hardened, at least at the measuring zone and at least in a near-surface region extending from a surface facing the magnetic field detection device to a depth of 20 μm, in such a way that it has a dislocation density of at least 5e8/cm2 and/or a residual stress of at least 400 MPa in amount.
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公开(公告)号：US20230074765A1
公开(公告)日：2023-03-09
申请号：US17941091
申请日：2022-09-09
申请人： Trafag AG
发明人： Tobias Ettenauer , Philippe Klemm , Dieter Huber
IPC分类号： G01N3/06
摘要： For improving the signal quality while simultaneously improving the function of test objects, a load measuring arrangement includes a test object and a load measuring device for measuring a load applied between a first and a second region of the test object. The test object has a transmission region receiving a major part of the load between the first and the second region. A secondary transmission element is connected to the first and second regions of the test object so as to receive a smaller portion of the load between the first and second regions in parallel with the transmission region. The load measuring device includes a magnetic field generating device for generating a magnetic field at the secondary transmission element, and a magnetic field detection device for detecting a magnetic field parameter changing due to the load at the secondary transmission element.
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公开(公告)号：US11927499B2
公开(公告)日：2024-03-12
申请号：US17253964
申请日：2019-06-19
申请人： Trafag AG
发明人： Tobias Ettenauer
摘要： In order to be able to carry out an accurate and simple contactless load measurement on test objects made from materials which are optimized with respect to the intended purpose thereof, the test object (14) and a load measuring apparatus for measuring a load on the test object, wherein the load measuring apparatus (12) has a magnetic field generating device (18) for generating a magnetic field in a measuring region (11) of the test object (14) and a first and a second magnetic field capturing device (20, 22) for capturing a magnetic field parameter which changes on account of the load, characterized in that the measuring region (11) has a layer (13) made of a ferromagnetic amorphous or nanocrystalline metal alloy with maximum particle sizes of less than 1 μm.
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公开(公告)号：US20230073155A1
公开(公告)日：2023-03-09
申请号：US17941120
申请日：2022-09-09
申请人： Trafag AG
发明人： Tobias Ettenauer , Falk von Seggern
摘要： For more accurate load measurement, a load measuring arrangement includes a test object and a load measuring device for measuring a load on the test object. The load measuring device includes at least one magnetic field detection device for detecting a magnetic field parameter changing due to load at a measuring zone of the test object. The test object is work-hardened, at least at the measuring zone and at least in a near-surface region extending from a surface facing the magnetic field detection device to a depth of 20 μm, in such a way that it has a dislocation density of at least 5e8/cm2 and/or a residual stress of at least 400 MPa in amount.
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公开(公告)号：US11585708B2
公开(公告)日：2023-02-21
申请号：US16622195
申请日：2018-06-11
申请人： Trafag AG
摘要： To improve the output signal quality of a load measurement by means of active magnetization, the invention provides a load measurement method for measuring a mechanical load on a test object (14), comprising:
a) generating and applying a magnetic field to the test object (14);
b) detecting a magnetic field changed by the test object (14) as a result of a mechanical load on the test object (14) by means of a first magnetic field detection device (20) to generate a first measurement signal (U1, UAB),
c) detecting a magnetic field changed by the test object (14) as a result of a mechanical load on the test object (14) by means of a second magnetic field detection device (22) to generate a second measurement signal (U1, UAB),
d) computationally determining a third measurement signal (UBT) from the first measurement signal (U1, UAB) and the second measurement signal (U2, UAT), and preferably comprising the steps of
e) forming a difference from one (U2, UAT) of the first and the second measurement signals and the computationally determined third measurement signal (UBT) to produce an output signal,
f) determining the mechanical load applied to the test object (14) based on the output signal.
The invention also provides a corresponding load measurement device for carrying out the load measurement method.
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