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公开(公告)号：US20170336516A1
公开(公告)日：2017-11-23
申请号：US15534213
申请日：2014-12-08
CPC分类号： G01S5/0294 , G01S5/0205 , G01S5/0263 , H04M1/72572 , H04W4/027 , H04W4/029 , H04W4/40 , H04W8/22
摘要： The invention relates to navigation, particularly, to detection of indoor and outdoor positions of mobile devices. Technical result of the invention is to improve the accuracy of mobile terminal position detection at time of occurrence of a specific trigger event and decrease of load on sensor, computing, communication and other resources of the mobile terminal at times when a trigger event occurs. Mobile terminal positioning technique at the trigger event moment, is characterized by the following sequence: receipt of series of readings of inertial and non-inertial sensors, identification of intervals, during which readings of at least one sensor generates a stationary process; then detection of at least one point of time, when at least one stationary process is replaced by another stationary process; then identification of parameters of at least one pattern of movement for at least one stationarity interval; then detection of at least one position of the mobile terminal according to readings of non-inertial sensors; estimation of mobile terminal path according to parameters of at least one pattern of movement and then of position corresponding to change of one stationary process to another; then detection of mobile terminal position at time corresponding to a specific trigger event.
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公开(公告)号：US20170168087A1
公开(公告)日：2017-06-15
申请号：US15363522
申请日：2016-11-29
发明人： Giacomo Gafforelli , Luca Coronato , Adolfo Giambastiani , Federico Mazzarella , Massimiliano Musazzi , Michele Folz
IPC分类号： G01P21/00 , G01P15/125
CPC分类号： G01P21/00 , G01P15/125
摘要： A microelectromechanical (MEMS) accelerometer has a proof mass, a sense electrode, and an auxiliary electrode. The sense electrode is located relative to the proof mass such that a capacitance formed by the sense electrode and the proof mass changes in response to a linear acceleration along a sense axis of the accelerometer. The auxiliary electrode is located relative to the proof mass such that a capacitance formed by the auxiliary electrode and proof mass is static in response to the linear acceleration. A sense drive signal is applied at the sense electrode and an auxiliary drive signal is applied at the auxiliary electrode. The sense drive signal and the auxiliary drive signal have different frequencies. An error is identified based on a portion of a signal that is received from the accelerometer and that is responsive to the auxiliary drive signal. Compensation is performed at the accelerometer based on the identified error.
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公开(公告)号：US20170168086A1
公开(公告)日：2017-06-15
申请号：US15363404
申请日：2016-11-29
发明人： Giacomo Gafforelli , Luca Coronato , Adolfo Giambastiani , Federico Mazzarella , Massimiliano Musazzi , Michele Folz
IPC分类号： G01P21/00 , G01P15/125
CPC分类号： G01P21/00 , G01P15/125
摘要： A microelectromechanical (MEMS) accelerometer has a proof mass, a sense electrode, and an auxiliary electrode. The sense electrode is located relative to the proof mass such that a capacitance formed by the sense electrode and the proof mass changes in response to a linear acceleration along a sense axis of the accelerometer. The auxiliary electrode is located relative to the proof mass such that a capacitance formed by the auxiliary electrode and proof mass is static in response to the linear acceleration. A sense drive signal is applied at the sense electrode and an auxiliary drive signal is applied at the auxiliary electrode. The sense drive signal and the auxiliary drive signal have difference frequencies. A portion of a sensed signal at the sense drive frequency is used to determine linear acceleration while a portion of the sensed signal at the auxiliary drive frequency is used to identify damage within a sense path from the proof mass.
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公开(公告)号：US20180288728A1
公开(公告)日：2018-10-04
申请号：US15523207
申请日：2014-10-28
摘要： The technique and the system may be used for indoor positioning, where signals of navigation satellites are not available. In accordance with the technique patterns identifying location of the mobile terminal in a specific position may be detected, on the basis of data acquired from at least one inertial and non-inertial sensors in the process of movement of at least one mobile terminal; the path of movement of the above mobile terminal may be detected and saved in the local coordinate system associated with the above position, as well as data acquired from non-inertial sensors; statistically averaged parameters of conversion of local coordinate system of the mobile terminal may be generated in the positions detected in the process of terminal movement; at least one map of distribution of output values of non-inertial sensors may be prepared on the basis of data acquired at the previous step; the position of the above mobile terminal may be detected on the basis of data acquired at the previous step. The system may include a set of sensors of mobile terminal, a computer, a probability computation module, a module for selection of patterns, a data storage package and a coordinate converter.
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公开(公告)号：US20170167876A1
公开(公告)日：2017-06-15
申请号：US15225281
申请日：2016-08-01
发明人： Luca Coronato , Giacomo Gafforelli , Jaakko Ruohio
IPC分类号： G01C19/5719
CPC分类号： G01C19/5719 , G01C19/5733 , G01C19/5762 , G01C19/5776 , G01C19/5783
摘要： A gyroscope includes drive electrodes that drive a drive mass at a drive frequency. A sense mass is responsive to a Coriolis force caused by rotation of the gyroscope and oscillates based on the drive frequency. Electrodes adjacent to the sense mass drive the sense mass at test frequencies. The response to the driving at the test frequencies is measured and a gyroscope failure is identified based on this response.
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公开(公告)号：US10341982B2
公开(公告)日：2019-07-02
申请号：US15523207
申请日：2014-10-28
摘要： The technique and the system may be used for indoor positioning, where signals of navigation satellites are not available. In accordance with the technique patterns identifying location of the mobile terminal in a specific position may be detected, on the basis of data acquired from at least one inertial and non-inertial sensors in the process of movement of at least one mobile terminal; the path of movement of the above mobile terminal may be detected and saved in the local coordinate system associated with the above position, as well as data acquired from non-inertial sensors; statistically averaged parameters of conversion of local coordinate system of the mobile terminal may be generated in the positions detected in the process of terminal movement; at least one map of distribution of output values of non-inertial sensors may be prepared on the basis of data acquired at the previous step; the position of the above mobile terminal may be detected on the basis of data acquired at the previous step. The system may include a set of sensors of mobile terminal, a computer, a probability computation module, a module for selection of patterns, a data storage package and a coordinate converter.
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公开(公告)号：US20170168085A1
公开(公告)日：2017-06-15
申请号：US15363333
申请日：2016-11-29
IPC分类号： G01P21/00 , G01P15/125
CPC分类号： G01P21/00 , B81B2201/0235 , B81C1/00698 , G01P15/125 , G01P2015/0831
摘要： A microelectromechanical (MEMS) sensor, such as an accelerometer, has one more proof masses that respond to movement of the sensor, the movement of which is measured based on a distance between the one or more proof masses and on one or more sense electrodes. The accelerometer also has a plurality of auxiliary electrodes and a signal generator configured to apply an auxiliary signal having a first harmonic frequency to the plurality of auxiliary electrodes. Circuitry receives a sensed signal from the plurality of sense electrodes and identifies a portion of the sensed signal having the first harmonic frequency. Based on this identified portion of the sensed signal, the circuitry determines whether a residual voltage is present on the one or more proof masses or on the one or more sense electrodes, and the circuitry modifies the operation of the accelerometer when the residual voltage is determined to be present in order to compensate for the residual voltage.
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公开(公告)号：US20170168084A1
公开(公告)日：2017-06-15
申请号：US15363242
申请日：2016-11-29
IPC分类号： G01P21/00 , G01P15/125 , G01R19/165
CPC分类号： G01P21/00 , G01P15/125 , G01P2015/0831 , G01R19/16566
摘要： A sensor such as an accelerometer includes a proof mass located opposite a plurality of electrodes located on a substrate. Some of the electrodes are auxiliary electrodes that apply an alternating current auxiliary signal to the proof mass while other electrodes are sense electrodes that sense movement of the proof mass. When a residual voltage is not present on the proof mass or on the sense electrodes, the forces imparted by the auxiliary signal onto the proof mass are substantially balanced. When the residual voltage is present on the proof masses, forces at a first harmonic frequency of the auxiliary signal are sensed by a sense electrode of the sensor. A self-test is failed if the sensed forces exceed a threshold.
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公开(公告)号：US20170167873A1
公开(公告)日：2017-06-15
申请号：US15225272
申请日：2016-08-01
发明人： Luca Coronato , Giacomo Gafforelli , Jaakko Ruohio
IPC分类号： G01C19/02
CPC分类号： G01C19/5776 , G01C19/02 , G01C25/005
摘要： A gyroscope is driven at a drive frequency and senses a Coriolis force caused by rotation of the gyroscope. The response of the gyroscope to a given Coriolis force may change due to changes in the gyroscope over time. A plurality of test frequencies are applied to the gyroscope, and the response of the gyroscope to those test frequencies is analyzed in order to track changes in the response of the gyroscope. Operational parameters of the gyroscope may be altered in order to compensate for those changes.
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公开(公告)号：US10656285B2
公开(公告)日：2020-05-19
申请号：US15534213
申请日：2014-12-08
IPC分类号： G01S19/47 , H04W4/40 , G01S5/02 , G01S19/45 , G01S19/48 , H04W4/02 , H04W4/029 , H04W8/22 , H04M1/725
摘要： The invention relates to navigation, particularly, to detection of indoor and outdoor positions of mobile devices. Technical result of the invention is to improve the accuracy of mobile terminal position detection at time of occurrence of a specific trigger event and decrease of load on sensor, computing, communication and other resources of the mobile terminal at times when a trigger event occurs. Mobile terminal positioning technique at the trigger event moment, is characterized by the following sequence: receipt of series of readings of inertial and non-inertial sensors, identification of intervals, during which readings of at least one sensor generates a stationary process; then detection of at least one point of time, when at least one stationary process is replaced by another stationary process; then identification of parameters of at least one pattern of movement for at least one stationarity interval; then detection of at least one position of the mobile terminal according to readings of non-inertial sensors; estimation of mobile terminal path according to parameters of at least one pattern of movement and then of position corresponding to change of one stationary process to another; then detection of mobile terminal position at time corresponding to a specific trigger event.
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