公开(公告)号：US20170003751A1

公开(公告)日：2017-01-05

申请号：US14974630

申请日：2015-12-18

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Antonio Micali ,  Alberto Zancanato ,  Federico Rizzardini

IPC: G06F3/01 ,  G01V3/08 ,  G01P15/00 ,  G01B7/30 ,  G01C19/00

CPC classification number: G06F3/017 ,  G01B7/30 ,  G01C17/38 ,  G01C19/00 ,  G01C21/10 ,  G01C21/165 ,  G01P15/00 ,  G01V3/081

Abstract: An electronic device determines an estimate ({circumflex over (q)}) of angular position as a function of an accelerometric signal (acc) supplied by an accelerometric sensor and as a function of at least one between a gyroscopic signal (gyro) supplied by a gyroscopic sensor and a magnetic signal (mag) supplied by a magnetic-field sensor. A processing module implements a complementary filter, which is provided with a first processing block, a second processing block, and a combination block. The first processing block receives the acceleration signal (acc) and an input signal (mag′) indicative of the magnetic signal (mag) and generates a geomagnetic quaternion (qAccMag). The second processing block receives a signal indicative of the gyroscopic signal (gyro) and generates a gyroscopic quaternion (qGyro). The combination block determines the estimate ({circumflex over (q)}) of angular position by complementarily combining the geomagnetic quaternion (qAccMag) and the gyroscopic quaternion (qGyro) based on a combination factor (K) that has a dynamic value and an adaptive value and that varies as a function of the operating conditions.

Abstract translation: 电子设备确定作为由加速度传感器提供的加速度信号（acc）的函数的角位置的估计（{回旋（q）}），并且作为由陀螺仪信号（gyro）提供的陀螺仪信号 陀螺传感器和由磁场传感器提供的磁信号（mag）。 处理模块实现了具有第一处理块，第二处理块和组合块的互补滤波器。 第一处理块接收加速度信号（acc）和指示磁信号（mag）的输入信号（mag'），并产生地磁四元数（qAccMag）。 第二处理块接收指示陀螺仪信号（gyro）的信号，并产生陀螺四分数（qGyro）。 基于具有动态值和自适应的组合因子（K），组合块通过将​​地磁四元数（qAccMag）和陀螺四分数（qGyro）互补地组合来确定角位置的估计（{circumflex over（q）}） 值，并且根据操作条件而变化。

公开(公告)号：US11280634B2

公开(公告)日：2022-03-22

申请号：US16433874

申请日：2019-06-06

Applicant: STMicroelectronics S.r.l.

Inventor： Stefano Paolo Rivolta ,  Andrea Labombarda ,  Alberto Zancanato

IPC: G01C22/00

Abstract: An activity tracking device, such as a step-counting device includes an interface configured to receive one or more acceleration signals and signal processing circuitry. The signal processing circuitry generates an indication of condition of an accelerometer, such as a body position of the accelerometer, based on one or more accelerometer signals, generates an event signal, such as an event flag, based on one or more accelerometer signals and the indication of the condition of the accelerometer, and generates an activity signal, such as step flag based on the event signal, the indication of the condition of the accelerometer and one or more acceleration signals. The signal processing circuitry may generate a noise signal based on one or more acceleration signals and generate the activity signal based on the noise signal.

公开(公告)号：US11186244B2

公开(公告)日：2021-11-30

申请号：US16362116

申请日：2019-03-22

Applicant: STMICROELECTRONICS S.r.l

Inventor： Alberto Zancanato ,  Michele Ferraina ,  Matteo Dameno ,  Mario Tesi

IPC: B60R21/015 ,  B60N2/00 ,  B60N2/26 ,  B60R25/32 ,  B60R25/34

Abstract: A child safety seat may include a motion sensor, e.g., an accelerometer, and a pressure sensor, e.g., a air pressure sensor. The motion sensor is configured to detect a motion state of a vehicle where the child safety seat is installed, e.g., whether the vehicle is moving or non-moving. The pressure sensor is configured to detect a motion state of a door of the vehicle, e.g., a door open/close motion. Based on the information detected by the motion sensor and the pressure sensor, a controller determines whether an awareness scenario occurs.

公开(公告)号：US10747330B2

公开(公告)日：2020-08-18

申请号：US16125515

申请日：2018-09-07

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Antonio Micali ,  Alberto Zancanato ,  Federico Rizzardini

IPC: G06F3/01 ,  G01B7/30 ,  G01C19/00 ,  G01P15/00 ,  G01V3/08 ,  G01C17/38 ,  G01C21/16 ,  G01C21/10 ,  G01C21/00

Abstract: An electronic device determines an estimate of angular position based on an accelerometric signal supplied by an accelerometric sensor and as a function of at least one of a gyroscopic signal from a gyroscopic sensor and a magnetic signal from a magnetic-field sensor. A processing module implements a complementary filter, which is provided with a first processing block, a second processing block, and a combination block. The first processing block receives the acceleration signal and an input signal indicative of the magnetic signal and generates a geomagnetic quaternion. The second processing block receives a signal indicative of the gyroscopic signal (gyro) and generates a gyroscopic quaternion. The combination block determines the estimate ({circumflex over (q)}) of angular position by complementarily combining the geomagnetic quaternion and the gyroscopic quaternion based on a combination factor that has a dynamic value and an adaptive value and that varies as a function of the operating conditions.

公开(公告)号：US11669770B2

公开(公告)日：2023-06-06

申请号：US16203275

申请日：2018-11-28

Applicant: STMicroelectronics S.r.l.

Inventor： Alberto Zancanato ,  Stefano Paolo Rivolta

IPC: G06N20/00 ,  G01C19/00 ,  G01P15/00 ,  G06F3/0346

CPC classification number: G06N20/00 ,  G01C19/00 ,  G01P15/00 ,  G06F3/0346 ,  G06F2218/02 ,  G06F2218/08 ,  G06F2218/12

Abstract: Technological advancements are disclosed that utilize inertial sensor data associated with a device to determine a new feature array and if the new feature array is within an existing class within a state space associated with the inertial sensor data. In response to the new feature array being included in the existing class, the new feature array is added to the existing class and a representation of the existing class in the state space is updated based on the new feature array and an existing representation of the existing class. In response to the new feature array not being included in the existing class, a new class is created based on the new feature array.

公开(公告)号：US20190310103A1

公开(公告)日：2019-10-10

申请号：US16433874

申请日：2019-06-06

Applicant: STMicroelectronics S.r.l.

Inventor： Stefano Paolo Rivolta ,  Andrea Labombarda ,  Alberto Zancanato

IPC: G01C22/00

Abstract: An activity tracking device, such as a step-counting device includes an interface configured to receive one or more acceleration signals and signal processing circuitry. The signal processing circuitry generates an indication of condition of an accelerometer, such as a body position of the accelerometer, based on one or more accelerometer signals, generates an event signal, such as an event flag, based on one or more accelerometer signals and the indication of the condition of the accelerometer, and generates an activity signal, such as step flag based on the event signal, the indication of the condition of the accelerometer and one or more acceleration signals. The signal processing circuitry may generate a noise signal based on one or more acceleration signals and generate the activity signal based on the noise signal.

公开(公告)号：US10114464B2

公开(公告)日：2018-10-30

申请号：US14974630

申请日：2015-12-18

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Antonio Micali ,  Alberto Zancanato ,  Federico Rizzardini

IPC: G09G5/00 ,  G01P15/00 ,  G01C17/00 ,  G01C19/00 ,  G06F3/01 ,  G01B7/30 ,  G01V3/08 ,  G01C17/38 ,  G01C21/10 ,  G01C21/16 ,  G01C9/00

Abstract: An electronic device determines an estimate ({circumflex over (q)}) of angular position as a function of an accelerometric signal (acc) supplied by an accelerometric sensor and as a function of at least one between a gyroscopic signal (gyro) supplied by a gyroscopic sensor and a magnetic signal (mag) supplied by a magnetic-field sensor. A processing module implements a complementary filter, which is provided with a first processing block, a second processing block, and a combination block. The first processing block receives the acceleration signal (acc) and an input signal (mag′) indicative of the magnetic signal (mag) and generates a geomagnetic quaternion (qAccMag). The second processing block receives a signal indicative of the gyroscopic signal (gyro) and generates a gyroscopic quaternion (qGyro). The combination block determines the estimate ({circumflex over (q)}) of angular position by complementarily combining the geomagnetic quaternion (qAccMag) and the gyroscopic quaternion (qGyro) based on a combination factor (K) that has a dynamic value and an adaptive value and that varies as a function of the operating conditions.

公开(公告)号：US11473894B2

公开(公告)日：2022-10-18

申请号：US17207180

申请日：2021-03-19

Applicant: STMicroelectronics S.r.l.

Inventor： Alberto Zancanato ,  Michele Ferraina ,  Federico Rizzardini ,  Stefano Paolo Rivolta

IPC: G01B7/30 ,  G01P15/14 ,  G01P15/18 ,  G06F1/16

Abstract: A computing system includes a first hardware element having a first accelerometer and a first gyroscope, and a second hardware element having a second accelerometer and a second gyroscope. The first and second hardware elements are moveable with respect to each other. The computing system recursively generates a result signal indicative of a relative orientation of the first and second hardware elements with respect to each other. The result signal may be generated by generating a first intermediate signal indicative of a angle between the first and second hardware elements based on signals generated by the first and second accelerometers and generating a second intermediate signal indicative of the angle based on signals generated by the first and second gyroscopes. The result signal indicative of the angle may be generated as a weighted sum of the first intermediate signal and the second intermediate signal. At least one of the first and second hardware elements is controlled by on the result signal.

公开(公告)号：US10976150B2

公开(公告)日：2021-04-13

申请号：US15987637

申请日：2018-05-23

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Alberto Zancanato ,  Michele Ferraina ,  Federico Rizzardini ,  Stefano Paolo Rivolta

IPC: G01B7/30 ,  G01P15/14 ,  G01P15/18 ,  G06F1/16

Abstract: A computing system includes a first hardware element having a first accelerometer and a first gyroscope, and a second hardware element having a second accelerometer and a second gyroscope. The first and second hardware elements are moveable with respect to each other. The computing system recursively generates a result signal indicative of a relative orientation of the first and second hardware elements with respect to each other. The result signal may be generated by generating a first intermediate signal indicative of a angle between the first and second hardware elements based on signals generated by the first and second accelerometers and generating a second intermediate signal indicative of the angle based on signals generated by the first and second gyroscopes. The result signal indicative of the angle may be generated as a weighted sum of the first intermediate signal and the second intermediate signal. At least one of the first and second hardware elements is controlled by on the result signal.

公开(公告)号：US10359296B2

公开(公告)日：2019-07-23

申请号：US15287437

申请日：2016-10-06

Applicant: STMicroelectronics S.r.l.

Inventor： Stefano Paolo Rivolta ,  Andrea Labombarda ,  Alberto Zancanato

IPC: G01P21/00 ,  G01C22/00

Abstract: An activity tracking device, such as a step-counting device includes an interface configured to receive one or more acceleration signals and signal processing circuitry. The signal processing circuitry generates an indication of condition of an accelerometer, such as a body position of the accelerometer, based on one or more accelerometer signals, generates an event signal, such as an event flag, based on one or more accelerometer signals and the indication of the condition of the accelerometer, and generates an activity signal, such as step flag based on the event signal, the indication of the condition of the accelerometer and one or more acceleration signals. The signal processing circuitry may generate a noise signal based on one or more acceleration signals and generate the activity signal based on the noise signal.