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公开(公告)号：US20200230482A1
公开(公告)日：2020-07-23
申请号：US16835247
申请日：2020-03-30
Applicant: Blast Motion Inc.
Inventor： James THORNBRUE , Patrick CHERVENY , Bhaskar BOSE , Michael BENTLEY , Ryan KAPS
Abstract: A system that measures a swing of a bat with one or more sensors and analyzes sensor data to create swing quality metrics. Metrics may include for example rotational acceleration, on-plane efficiency, and body-bat connection. Rotational acceleration measures the centripetal acceleration of the bat along the bat's longitudinal axis at a point early in the rotational part of the swing; it is an indicator of the swing's power. On-plane efficiency measures how much of the bat's angular velocity occurs around the swing plane, the plane spanned by the bat and the bat's sweet spot velocity at impact. Body-bat connection measures the angle between the bat and the body tilt axis, which is estimated from the trajectory of the hand position on the bat through the swing; an ideal bat-body connection is near 90 degrees. These three swing quality metrics provide a simple and useful characterization of the swing mechanics.
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公开(公告)号：US20180021648A1
公开(公告)日：2018-01-25
申请号：US15633094
申请日：2017-06-26
Applicant: Blast Motion Inc.
Inventor： James THORNBRUE , Patrick CHERVENY
IPC: A63B69/00
CPC classification number: A63B69/0002 , A63B2069/0008 , A63B2071/0694 , A63B2220/803 , G06K9/00342 , G06K9/00536 , G06Q10/0639 , G16H20/30
Abstract: A method for analyzing sensor data from baseball swings (or swings in similar sports) that transforms data into a reference frame defined by the bat orientation and velocity at impact. The swing plane defined by these two axes provides a natural and robust reference frame for physically relevant measurements of swing characteristics. Illustrative swing metrics derived from swing plane reference frame data include: swing speed, defined as a rotational rate within the swing plane; total swing angle, defined as the angular change within the swing plane; and swing tempo, defined as the percentage of peak swing speed achieved halfway through the swing. Analyzing these metrics from multiple swings across multiple users identifies factors that contribute to peak performance. Metrics may be combined into multidimensional feature vectors that characterize a swing; these feature vectors may be used to group swings into swing styles or to match swings against similar players.
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公开(公告)号：US20190209909A1
公开(公告)日：2019-07-11
申请号：US16355025
申请日：2019-03-15
Applicant: Blast Motion Inc.
Inventor： James THORNBRUE , Patrick CHERVENY , Bhaskar BOSE , Michael BENTLEY , Ryan KAPS
Abstract: A system that measures a swing of a bat with one or more sensors and analyzes sensor data to create swing quality metrics. Metrics may include for example rotational acceleration, on-plane efficiency, and body-bat connection. Rotational acceleration measures the centripetal acceleration of the bat along the bat's longitudinal axis at a point early in the rotational part of the swing; it is an indicator of the swing's power. On-plane efficiency measures how much of the bat's angular velocity occurs around the swing plane, the plane spanned by the bat and the bat's sweet spot velocity at impact. Body-bat connection measures the angle between the bat and the body tilt axis, which is estimated from the trajectory of the hand position on the bat through the swing; an ideal bat-body connection is near 90 degrees. These three swing quality metrics provide a simple and useful characterization of the swing mechanics.
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Patent Agency Ranking
公开(公告)号：US20190147233A1
公开(公告)日：2019-05-16
申请号：US16181955
申请日：2018-11-06
Applicant: Blast Motion Inc.
Inventor： Patrick CHERVENY , James R. THORNBRUE , Bhaskar BOSE
Abstract: A method of calculating the stress on a joint by determining when a joint angle is outside the normal range of motion for the joint. Applications include analysis of elbow joint stress for baseball pitchers, for example to mitigate the risk of injury to the ulnar collateral ligament (UCL). During a movement such as a baseball pitch, sensor data is collected to track the position, orientation, or motion of body segments; joint angles are derived from this sensor data. Joint angles are then compared to a range of motion, which may be measured for each individual. Joint stress contributions from movements that exceed the range of motion may be combined over time to calculate cumulative joint fatigue. This joint fatigue measure may for example be used for pitchers to quantify recovery periods (days off) and future workloads (such as maximum pitch counts).
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公开(公告)号：US20190147219A1
公开(公告)日：2019-05-16
申请号：US15815696
申请日：2017-11-16
Applicant: Blast Motion Inc.
Inventor： James THORNBRUE , Patrick CHERVENY , Juergen HAAS
CPC classification number: G06K9/00208 , G06K9/00342 , G06T1/0007 , G06T7/251 , G06T2207/10004 , G06T2207/10016 , G06T2207/30241
Abstract: A method that estimates the 3D trajectory of a projectile, such as a golf ball or baseball, by analyzing a sequence of images from a single-lens, 2D camera. Image analysis may be used to locate the projectile in the camera images, using motion detection and filters for the projectile's expected size and shape. A physics model may be used to calculate the projectile's trajectory as a function of its initial position and velocity (for example, just after impact with a golf club or bat). A camera projection transform may map this trajectory into predicted pixel locations, which may be compared to the observed projectile locations in the camera images. The projectile's trajectory may be estimated by finding initial conditions that minimize differences between observed and predicted pixel locations, using a nonlinear least squares solver for example. The method may be extended to multiple cameras.
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公开(公告)号：US20210228963A1
公开(公告)日：2021-07-29
申请号：US17228635
申请日：2021-04-12
Applicant: Blast Motion Inc.
Inventor： James THORNBRUE , Patrick CHERVENY , Bhaskar BOSE , Michael BENTLEY , Ryan KAPS
Abstract: A system that measures a swing of a bat with one or more sensors and analyzes sensor data to create swing quality metrics. Metrics may include for example rotational acceleration, on-plane efficiency, and body-bat connection. Rotational acceleration measures the centripetal acceleration of the bat along the bat's longitudinal axis at a point early in the rotational part of the swing; it is an indicator of the swing's power. On-plane efficiency measures how much of the bat's angular velocity occurs around the swing plane, the plane spanned by the bat and the bat's sweet spot velocity at impact. Body-bat connection measures the angle between the bat and the body tilt axis, which is estimated from the trajectory of the hand position on the bat through the swing; an ideal bat-body connection is near 90 degrees. These three swing quality metrics provide a simple and useful characterization of the swing mechanics.
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公开(公告)号：US20190076720A1
公开(公告)日：2019-03-14
申请号：US16189889
申请日：2018-11-13
Applicant: Blast Motion Inc.
Inventor： James THORNBRUE , Patrick CHERVENY , Bhaskar BOSE , Michael BENTLEY , Ryan KAPS
IPC: A63B69/36 , G06Q10/06 , G16H20/30 , G06F19/00 , G06K9/00 , G01P15/08 , G06T7/20 , G01C21/16 , A63B69/00
Abstract: A method for analyzing sensor data from baseball swings (or swings in similar sports) that transforms data into a reference frame defined by the bat orientation and velocity at impact. The trajectory of the sweet spot of the bat is tracked through the swing, and is analyzed to generate metrics describing the swing. A two-lever model of the swing may be used to model the effects of body rotation and wrist rotation. Data may be analyzed to identify relevant events during the swing such as start of downswing, commit (wrist release), on-plane, peak bat speed, and impact. Illustrative swing metrics derived from the sweet spot trajectory, the swing plane reference frame, and the two-lever model include: forward bat speed, on-plane rotation, hinge angle at commit, hinge angle at impact, body rotation ratio, body tilt angle, and swing plane tilt angle.
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公开(公告)号：US20180021653A1
公开(公告)日：2018-01-25
申请号：US15628613
申请日：2017-06-20
Applicant: Blast Motion Inc.
Inventor： James THORNBRUE , Patrick CHERVENY , Bhaskar BOSE , Michael BENTLEY , Ryan KAPS
CPC classification number: A63B69/3685 , A63B69/3635 , A63B2069/0008 , A63B2220/18 , A63B2220/833 , G01C21/16 , G01P15/0888 , G06F19/00 , G06F19/3481 , G06K9/00342 , G06K9/00523 , G06K9/00536 , G06Q10/0639 , G06T7/20
Abstract: A method for analyzing sensor data from baseball swings (or swings in similar sports) that transforms data into a reference frame defined by the bat orientation and velocity at impact. The trajectory of the sweet spot of the bat is tracked through the swing, and is analyzed to generate metrics describing the swing. A two-lever model of the swing may be used to model the effects of body rotation and wrist rotation. Data may be analyzed to identify relevant events during the swing such as start of downswing, commit (wrist release), on-plane, peak bat speed, and impact. Illustrative swing metrics derived from the sweet spot trajectory, the swing plane reference frame, and the two-lever model include: forward bat speed, on-plane rotation, hinge angle at commit, hinge angle at impact, body rotation ratio, body tilt angle, and swing plane tilt angle.
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