Seiko Epson Corporation

Keio University

Kazuhiro Shibuya

Kenya Kodaira

Masafumi Sato

Ken Ota

Kazuo Nomura

Tsuyoshi Ito

Fumikazu Sano

Takuya Hiraide

Masaki Ukawa

A swing analysis method includes acquiring measurement data measured by an inertial sensor in a swing motion with a golf club, and calculating torque data indicating a temporal change of a torque exerted on the golf club by analyzing the measurement data using a head speed coordination system having a first axis including a speed vector of a head of the golf club, a second axis being orthogonal to the first axis and extending along a shaft of the golf club, and a third axis orthogonal to both the first axis and the second axis.

Swing analysis method and swing analysis device

A portable electronic apparatus includes an operation section adapted to receive an operation of a user and output a rest start signal representing start of a rest, a body motion sensor adapted to output a body motion signal based on a motion of the user, a timing section adapted to measure rest time of the user, and a processor electrically connected to the operation section, the body motion sensor, and the timing section, and the processor starts the measurement of the rest time by the timing section in the case in which the processor fails to detect the rest start signal, and fails to detect the periodic component based on the motion of the user in the body motion signal for a predetermined period.

Portable electronic apparatus

A swing analysis device includes: an acquisition unit (swing video acquisition unit) acquiring a swing video of a user; a processing unit deciding an impact timing and a tempo, based on the swing video; and a display unit displaying the swing video and the tempo. The display unit, while displaying the swing video, displays the tempo when the impact timing is reached in the swing video.

Swing analysis device, swing analysis method, and swing analysis system

An exercise analyzing device (a swing analyzing device) includes an acquiring section (a data acquiring section) configured to acquire an output of a first inertial sensor (an acceleration sensor and an angular velocity sensor) attached to a body of a user and an output of a second inertial sensor (an acceleration sensor and an angular velocity sensor) attached to an exercise instrument (a golf club), an analyzing section (a swing analyzing section) configured to analyze a correlation or a similarity degree between the output of the first inertial sensor and the output of the second inertial sensor and generate reference information, and an output processing section configured to estimate, when the second inertial sensor is not used, the output of the second inertial sensor from the output of the first inertial sensor and the reference information.

Exercise analyzing device, exercise analyzing system, and exercise analyzing method

A motion analysis device includes a first calculation unit that obtains a relation between a movement direction of a ball hitting surface of an exercise tool at a time of entering an impact and a posture of the ball hitting surface at the impact by using an output of an inertial sensor.

Motion analysis device, motion analysis system, motion analysis method, program, and recording medium

A motion analysis method includes calculating a change in an amount of inertia of a region attached with an inertial sensor during a swing using an output of the inertial sensor, and identifying a maximum value of the amount of inertia during the swing to compare the maximum value and the amount of inertia at an impact with each other. A deceleration timing during the swing of the region (the grip of the sporting equipment) attached with the inertial sensor is identified, and the quality of the swing can be evaluated.

Motion analysis method and motion analysis device

A motion analysis method includes a normal mode in which first motion information in a swing is measured by using an output from a sensor unit in a state in which a standing still action is detected, and a simple mode in which second motion information in a swing is measured by using an output from the sensor unit in a state in which the standing still action is not detected, and the number of analysis items is smaller than in the normal mode.

Motion analysis method and display method

A display method includes acquiring first attitude information of the hands of a subject holding an exercise equipment during standing still on the basis of an output from an inertial sensor (sensor unit) which measures a swing action of the subject (user) performing a swing with the exercise equipment (golf club) and is attached to at least one of the exercise equipment and the subject, acquiring second attitude information of the hands of the subject holding the exercise equipment at impact on the basis of an output from the inertial sensor, and displaying at least one of the first attitude information and the second attitude information.

Display method, display apparatus, motion analysis system, motion analysis program, and recording medium

A motion analysis device that obtains a relation between a movement direction of a ball hitting surface of an exercise tool at a time of starting a swing and a posture of the ball hitting surface at the time of impact during the swing by using output of an inertial sensor.

A motion analysis method includes: specifying plural operations included in a motion operation using an output from an inertial sensor; calculating an operating time of each of the plural operations; adjusting a time axis of each operating time; and outputting operation information of the operation based on the adjusted time axis.

Motion analysis method and motion analysis apparatus

A golf swing analysis device includes a joint force calculation section and a torque extraction section. The joint force calculation section generates a double pendulum model that includes a first link that corresponds to an upper part of a body of a golfer, a second link that corresponds to a golf club, and a joint that links the first link and the second link, and calculates a joint force applied to the joint along with a swing motion using an acceleration measured by an inertial sensor attached to the golf club. The torque extraction section extracts a torque that causes the second link to make a rotational motion around a first axis from the joint force.

Golf swing analysis device and golf swing analysis method

A motion analysis device has a determination unit which uses an output from an inertial sensor mounted on at least one of a subject and a tool operated by the subject, to determine a dominant hand of the subject in a swing. The determination unit can determine the dominant hand on the basis of the sign of angular velocity or acceleration from the inertial sensor. A calculation unit which calculates motion analysis information in a swing, using an output from the inertial sensor can add dominant hand information from the determination unit to the motion analysis information. The motion analysis device can include a coincidence determination unit which determines that a first subject and a second subject have different dominant hands, and an inverted image generation unit which inverts first motion analysis information in the case of no coincidence.

Motion analysis method, motion analysis display method, and motion analysis device

An aspect of the invention relates to a golf swing analyzing apparatus, comprising: a first arithmetic section operating to use an output from a first inertial sensor and an output from a second inertial sensor to calculate a first energy amount, the first inertial sensor being attached to a portion of an upper body of a golfer, the second inertial sensor being attached to a golf club, the first energy amount being generated in the upper body of the golfer; a second arithmetic section operating to use the output from the first inertial sensor and the output from the second inertial sensor to calculate a second energy amount transferred to the golf club from the upper body of the golfer; and a processing section calculating an energy transferring ratio of an energy transferred from the upper body of the golfer to the golf club based on a ratio of the second energy amount to the first energy amount.

Golf swing analyzing apparatus and method of analyzing golf swing

An aspect of the invention relates to a golf swing analyzing apparatus, comprising: an arithmetic section operating to use the output of an inertial sensor to calculate bending moment acting on the golf club, the inertial sensor being attached to the golf club.

An aspect of the invention relates to a golf swing analyzing apparatus, comprising: an arithmetic section operating to process the output of a first inertial sensor and the output of a second inertial sensor to calculate a relative angle between a forearm of a golfer and a golf club, the first inertial sensor being attached to a portion of the upper body of the golfer, the second inertial sensor being attached to the golf club.

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Shiojiri, Japan

Kazuhiro Shibuya