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公开(公告)号：US12125321B2
公开(公告)日：2024-10-22
申请号：US18200718
申请日：2023-05-23
Applicant: CAMBRIDGE MOBILE TELEMATICS INC.
Inventor： Sushrut Karnik , Burak Erem , Yuting Qi , Sanujit Sahoo , Harrison Kitchen
CPC classification number: G07C5/008 , G01P15/08 , G01P15/18 , G06N3/04 , G06N3/08 , G07C5/02 , G07C2205/02
Abstract: A method includes receiving, from a mobile device disposed within a vehicle, a set of sensor measurements collected from an accelerometer of the mobile device during a first time period and converting the set of sensor measurements into a frequency domain. The method also includes filtering the set of sensor measurements to eliminate high frequency sensor measurements and defining a set of contiguous windows based on a remaining sensor measurements in the set of sensor measurements. Each contiguous window of the set of contiguous windows represents a contiguous portion of the remaining sensor measurements. The method further includes generating, for each contiguous window of the set of contiguous windows, a set of features by resampling the remaining sensor measurements of the contiguous window at one or more predefined frequencies and generating an estimated speed of the vehicle during the first time period using the set of features.
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公开(公告)号：US20230298409A1
公开(公告)日：2023-09-21
申请号：US18200718
申请日：2023-05-23
Applicant: CAMBRIDGE MOBILE TELEMATICS INC.
Inventor： Sushrut Karnik , Burak Erem , Yuting Qi , Sanujit Sahoo , Harrison Kitchen
CPC classification number: G07C5/008 , G01P15/08 , G01P15/18 , G06N3/04 , G06N3/08 , G07C5/02 , G07C2205/02
Abstract: A method includes receiving, from a mobile device disposed within a vehicle, a set of sensor measurements collected from an accelerometer of the mobile device during a first time period and converting the set of sensor measurements into a frequency domain. The method also includes filtering the set of sensor measurements to eliminate high frequency sensor measurements and defining a set of contiguous windows based on a remaining sensor measurements in the set of sensor measurements. Each contiguous window of the set of contiguous windows represents a contiguous portion of the remaining sensor measurements. The method further includes generating, for each contiguous window of the set of contiguous windows, a set of features by resampling the remaining sensor measurements of the contiguous window at one or more predefined frequencies and generating an estimated speed of the vehicle during the first time period using the set of features.
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公开(公告)号：US11134360B2
公开(公告)日：2021-09-28
申请号：US15486053
申请日：2017-04-12
Applicant: Cambridge Mobile Telematics Inc.
Inventor： Brad Cordova , Sanujit Sahoo , Sushrut Karnik
Abstract: A method of orienting a mobile device to a vehicle includes determining an orientation of a gravity vector and aligning a first axis of the mobile device with respect to the gravity vector. The method also includes determining an orientation of a magnetic direction and aligning a second axis of the mobile device with respect to the magnetic direction. The method further includes determining a direction of travel for the vehicle and orienting the mobile device to the vehicle.
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公开(公告)号：US20220294893A1
公开(公告)日：2022-09-15
申请号：US17682360
申请日：2022-02-28
Applicant: CAMBRIDGE MOBILE TELEMATICS INC.
Inventor： Brad Cordova , Eddie Vaisman , Yuting Qi , Sushrut Karnik
IPC: H04M1/72421 , B60R21/015 , B60K28/14 , B60R21/013
Abstract: A method for detecting airbag deployment includes operating a plurality of sensors of the mobile device disposed in a vehicle during a drive to obtain a plurality of measurement signals, determining a change in at least one measurement signal of the plurality of measurement signals and that the change exceeds a first threshold. In response to determining that the change exceeds the first threshold, obtaining a pressure measurement signal from a pressure sensor of the plurality of sensors, determining a derivative of the pressure measurement signal, and determining that the derivative of the pressure measurement signal exceeds a second threshold. In response to determining that the derivative of the pressure measurement signal exceeds the second threshold, detecting a deployment of a vehicle airbag based on the change in the at least one measurement signal exceeding the first threshold and the derivative of the pressure measurement signal exceeding the second threshold.
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公开(公告)号：US12120579B2
公开(公告)日：2024-10-15
申请号：US17406373
申请日：2021-08-19
Applicant: Cambridge Mobile Telematics Inc.
Inventor： Brad Cordova , Sanujit Sahoo , Sushrut Karnik
CPC classification number: H04W4/029 , G01C21/20 , H04M1/725 , H04W4/026 , H04M2250/10 , H04M2250/12
Abstract: A method of providing a quaternion for reference frame transformation includes (a) initiating a driving event in a vehicle having a vehicle reference frame and (b) receiving, from a mobile device, mobile device data associated with a time stamp. The method also includes (c) computing a quaternion operable to transform the mobile device data to the vehicle reference frame and (d) determining if the driving event is complete. The method further includes incrementing the time stamp and iterating steps (a), (b), (c), and (d) if the driving event is not complete and providing the quaternion for reference frame transformation if the driving event is complete.
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Patent Agency Ranking
公开(公告)号：US11991597B2
公开(公告)日：2024-05-21
申请号：US17987662
申请日：2022-11-15
Applicant: CAMBRIDGE MOBILE TELEMATICS INC.
Inventor： Brad Cordova , Sushrut Karnik
CPC classification number: H04W4/029 , H04M1/0202 , H04M2250/12 , H04W4/027
Abstract: A method for determining a transportation mode acquires motion data and speed data from a mobile device, correlates the motion data to the speed data in groupings, and performs spectral analysis on the groups of motion data. Energy calculated for each of a set of frequency components obtained from the spectral analysis is compared to a baseline value to generate a difference, and a transportation mode type is assigned to the vehicle based on the difference.
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公开(公告)号：US20230143632A1
公开(公告)日：2023-05-11
申请号：US17987662
申请日：2022-11-15
Applicant: CAMBRIDGE MOBILE TELEMATICS INC.
Inventor： Brad Cordova , Sushrut Karnik
IPC: H04W4/029
CPC classification number: H04W4/029 , H04M2250/12 , H04M1/0202
Abstract: A method for determining a transportation mode acquires magnetometer and speed data from a mobile device, correlates the magnetometer to the speed data in groupings, and performs spectral analysis on the groups of magnetometer data. Energy calculated for each of a set of frequency components obtained from the spectral analysis is compared to a baseline value to generate a difference, and a transportation mode type is assigned to the vehicle based on the difference.
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公开(公告)号：US20250031016A1
公开(公告)日：2025-01-23
申请号：US18907059
申请日：2024-10-04
Applicant: Cambridge Mobile Telematics Inc.
Inventor： Brad Cordova , Sanujit Sahoo , Sushrut Karnik
Abstract: Techniques for identifying mobile device use by a driver of a vehicle during a driving event are provided. In an example, motion data collected by one or more sensors of a mobile device during a driving event are obtained. Using the motion data, the motion data is reoriented to the reference frame of the vehicle. From the reoriented motion data, it is determined that the mobile device moved toward a driver's side of the vehicle and a front screen of the mobile device faced the driver's side of the vehicle during the driving event. Based on the movement and orientation of the mobile device toward the driver's side, a use of the mobile device by the driver is identified.
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公开(公告)号：US11699306B2
公开(公告)日：2023-07-11
申请号：US16994232
申请日：2020-08-14
Applicant: CAMBRIDGE MOBILE TELEMATICS INC.
Inventor： Sushrut Karnik , Burak Erem , Yuting Qi , Sanujit Sahoo , Harrison Kitchen
CPC classification number: G07C5/008 , G01P15/08 , G01P15/18 , G06N3/04 , G06N3/08 , G07C5/02 , G07C2205/02
Abstract: Apparatuses and methods for predicting a crash using estimated vehicle speed. A set of sensor measurements are received from a mobile device disposed within a vehicle. A set of contiguous windows based on the sensor measurements may be defined. Each contiguous window represents a contiguous portion of the sensor measurements. A set of sensor measurements may be defined for each contiguous window. A trained neural network may execute, using the set of features, to generate one or more speed predictions. A vehicle crash prediction may be generated using the speed prediction. The vehicle crash prediction may then be transmitted to a remote device.
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公开(公告)号：US11546733B2
公开(公告)日：2023-01-03
申请号：US17220886
申请日：2021-04-01
Applicant: CAMBRIDGE MOBILE TELEMATICS INC.
Inventor： Brad Cordova , Sushrut Karnik
Abstract: A method for determining a transportation mode acquires magnetometer and speed data from a mobile device, correlates the magnetometer to the speed data in groupings, and performs spectral analysis on the groups of magnetometer data. Energy calculated for each of a set of frequency components obtained from the spectral analysis is compared to a baseline value to generate a difference, and a transportation mode type is assigned to the vehicle based on the difference.
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