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公开(公告)号：US10421470B2
公开(公告)日：2019-09-24
申请号：US15450794
申请日：2017-03-06
申请人： Aktiebolaget SKF
发明人： Elena Pinto , Victor Martinez
摘要： The present invention defines a method of determining a vertical profile signal of a rail surface that includes, obtaining a vertical acceleration signal acc1, by measuring vertical acceleration of a bogie of a rail vehicle that runs on the rail surface; processing the vertical acceleration signal to obtain a vertical velocity signal; determining the vertical profile signal of the rail surface, by using the vertical acceleration signal and the vertical velocity signal as inputs to a simulation model of the bogie, the model having an unsprung mass connected to a sprung mass, the vertical acceleration signal acc1 represents the vertical acceleration of the unsprung mass; and measuring a linear velocity signal of the rail vehicle, the linear velocity signal is used in the step of determining to convert the vertical profile signal from the time domain to the distance domain.
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公开(公告)号：US20210284206A1
公开(公告)日：2021-09-16
申请号：US17158410
申请日：2021-01-26
申请人： Aktiebolaget SKF
发明人： Victor Martinez , Elena Pinto
摘要： A system for monitoring a wheel-rail contact force, the system providing a measuring unit for measuring a vertical acceleration of a wheel being connected to a bogie. The wheel is configured to run on a rail. The system includes a calculation unit for simulating a wheel-rail interaction using the measured vertical acceleration and for calculating a wheel-rail contact force based on the simulated wheel-rail interaction. Also, a method for the same.
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公开(公告)号：US20170267263A1
公开(公告)日：2017-09-21
申请号：US15450794
申请日：2017-03-06
申请人： Aktiebolaget SKF
发明人： Elena Pinto , Victor Martinez
摘要： The present invention defines a method of determining a vertical profile signal of a rail surface that includes, obtaining a vertical acceleration signal acc1, by measuring vertical acceleration of a bogie of a rail vehicle that runs on the rail surface; processing the vertical acceleration signal to obtain a vertical velocity signal; determining the vertical profile signal of the rail surface, by using the vertical acceleration signal and the vertical velocity signal as inputs to a simulation model of the bogie, the model having an unsprung mass connected to a sprung mass, the vertical acceleration signal acc1 represents the vertical acceleration of the unsprung mass; and measuring a linear velocity signal of the rail vehicle, the linear velocity signal is used in the step of determining to convert the vertical profile signal from the time domain to the distance domain.
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公开(公告)号：US10780905B2
公开(公告)日：2020-09-22
申请号：US16057862
申请日：2018-08-08
申请人： Aktiebolaget SKF
发明人： Elena Pinto , Victor Martinez
摘要： A method of determining the geographical position of a rail vehicle travelling on a defined route that has a number of known stopping locations separated by known distances. The method comprises steps of: recording a linear speed signal of the vehicle; processing the linear speed signal to identify a plurality of preceding stationary periods when linear speed equals zero, including a last stationary period, and to calculate the distance traveled between the plurality of preceding stationary periods; comparing the calculated distances with the known distances between stopping locations, to match the last identified stationary period to a corresponding one of the known stopping locations and identify the direction of travel of the rail vehicle; and determining the geographical position of the rail vehicle by processing a portion of the speed signal obtained since the last identified stationary period, to calculate the distance traveled from the corresponding stopping location.
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公开(公告)号：US09989097B2
公开(公告)日：2018-06-05
申请号：US15278082
申请日：2016-09-28
申请人： Aktiebolaget SKF
发明人： Yoann Hebrard , Defeng Lang , Andreas Karlsson , Victor Martinez , Frank de Wit
CPC分类号： F16C41/008 , F16C19/386 , F16C19/52 , F16C33/3831 , F16C33/44 , F16C33/4611 , F16C33/4635 , F16C33/56 , F16C41/002 , F16C2202/40 , F16C2233/00 , F16C2300/02 , G01M13/04 , H01Q1/27 , H01Q7/00
摘要： The invention relates to a bearing cage including a bearing cage main body made of a polymer material and having pockets for receiving at least one row of rolling elements of a bearing. The cage is provided with a passive resonant circuit including an antenna coil attached to the cage main body. It is proposed that the antenna coil is formed as a conductive layer directly attached to the cage material of the bearing cage main body and is designed so as to have a breaking point less than or equal to a breaking point of the cage material. Thus, a rupture in the cage main body ruptures the antenna coil, changing the resonance behavior of the passive resonant circuit.
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公开(公告)号：US11320446B2
公开(公告)日：2022-05-03
申请号：US16423350
申请日：2019-05-28
申请人： Aktiebolaget SKF
发明人： Florin Tatar , Victor Martinez , Hendrik Anne Mol , Feng Qiu
IPC分类号： G01M13/045 , G01P3/44 , B61L15/00 , F16C41/00 , G01M13/04
摘要： A condition monitoring system for monitoring a rolling element bearing. The system includes a signal processing unit and a vibration energy harvester. The vibration energy harvester provides an electromagnetic transducer. When vibrated, a coil moves relative to a static electromagnetic field to create power. To create a compact and efficient condition monitoring system, it uses the electromagnetic transducer also as a vibration sensor, a velocity sensor. The signal processing unit determines if the bearing has been damaged and in some embodiments also the extent of the damage. The electromagnetic transducer is attached directly or indirectly to the rolling element bearing.
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公开(公告)号：US20190391174A1
公开(公告)日：2019-12-26
申请号：US16423350
申请日：2019-05-28
申请人： Aktiebolaget SKF
发明人： Florin Tatar , Victor Martinez , Hendrik Anne Mol , Feng Qiu
摘要： A condition monitoring system for monitoring a rolling element bearing. The system includes a signal processing unit and a vibration energy harvester. The vibration energy harvester provides an electromagnetic transducer. When vibrated, a coil moves relative to a static electromagnetic field to create power. To create a compact and efficient condition monitoring system, it uses the electromagnetic transducer also as a vibration sensor, a velocity sensor. The signal processing unit determines if the bearing has been damaged and in some embodiments also the extent of the damage. The electromagnetic transducer is attached directly or indirectly to the rolling element bearing.
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公开(公告)号：US20190084599A1
公开(公告)日：2019-03-21
申请号：US16057862
申请日：2018-08-08
申请人： Aktiebolaget SKF
发明人： Elena Pinto , Victor Martinez
CPC分类号： B61L25/026 , B61L25/021 , B61L25/023 , B61L25/06
摘要： A method of determining the geographical position of a rail vehicle travelling on a defined route that has a number of known stopping locations separated by known distances. The method comprises steps of: recording a linear speed signal of the vehicle; processing the linear speed signal to identify a plurality of preceding stationary periods when linear speed equals zero, including a last stationary period, and to calculate the distance travelled between the plurality of preceding stationary periods; comparing the calculated distances with the known distances between stopping locations, to match the last identified stationary period to a corresponding one of the known stopping locations and identify the direction of travel of the rail vehicle; and determining the geographical position of the rail vehicle by processing a portion of the speed signal obtained since the last identified stationary period, to calculate the distance travelled from the corresponding stopping location.
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