Analysis apparatus, analysis method, and recording medium

• US 10,406,413 B2
• Filed: 10/03/2014
• Issued: 09/10/2019
• Est. Priority Date: 12/05/2013
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Matsunaga, Hideyuki, Yamashita, Kosei
• Primary Examiner(s): Kuan, John C
• Application Number:
  US15/039,097
• Publication Number:
  US 20170157480A1
• Time in Patent Office: 1,803 Days
• Field of Search: None
• CPC Class Codes: A61B 5/11 Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb for measuring pulse A61B5/02 ;A61B5/1038 takes precedence; motion detection to correct for motion artifacts in physiological signals A61B5/721
• CPC Class Codes: A63B 2102/02 Tennis
• CPC Class Codes: A63B 2102/04 Badminton
• CPC Class Codes: A63B 2102/16 Table tennis
• CPC Class Codes: A63B 2102/18 Baseball, rounders or similar games
• CPC Class Codes: A63B 2102/32 Golf
• CPC Class Codes: A63B 2220/30 Speed
• CPC Class Codes: A63B 2220/40 Acceleration
• CPC Class Codes: A63B 2220/50 Force related parameters
• CPC Class Codes: A63B 2220/803 Motion sensors
• CPC Class Codes: A63B 2220/833 Sensors arranged on the exercise apparatus or sports implement
• CPC Class Codes: A63B 2220/89 Field sensors, e.g. radar systems
• CPC Class Codes: A63B 2225/50 Wireless data transmission, e.g. by radio transmitters or telemetry
• CPC Class Codes: A63B 24/0062 Monitoring athletic performances, e.g. for determining the work of a user on an exercise apparatus, the completed jogging or cycling distance
• CPC Class Codes: A63B 49/00 Stringed rackets, e.g. for tennis strings therefor A63B51/00
• CPC Class Codes: A63B 60/002 Resonance frequency related characteristics
• CPC Class Codes: A63B 60/46 Measurement devices associated with golf clubs, bats, rackets or the like for measuring physical parameters relating to sporting activity, e.g. baseball bats with impact indicators or bracelets for measuring the golf swing
• CPC Class Codes: G01P 15/18 in two or more dimensions
• CPC Class Codes: G01P 3/12 by making use of a system excited by impact
• CPC Class Codes: G06F 2218/00 Aspects of pattern recognition specially adapted for signal processing
• CPC Class Codes: G06F 2218/10 : by analysing the shape of a waveform, e.g. extracting parameters relating to peaks
• CPC Class Codes: G06N 20/00 : Machine learning
• CPC Class Codes: G06V 40/23 : Recognition of whole body movements, e.g. for sport training

Abstract

Provided is an analysis apparatus including an acquisition unit that acquires vibration data showing a vibration generated in a first object by having a second object come into contact with a first position on the first object, a first analysis processing unit that specifies the first position by comparing a vibration characteristic shown by the vibration data, and a vibration characteristic defined for each position where the second object may come into contact with the first object, and a second analysis processing unit that estimates a velocity after the contact of the second object based on a velocity of the first object and the first position.

Claims

1. An analysis apparatus, comprising:

at least one sensor configured to acquire vibration data

that represents vibration generated in a first object; and

at least one processor configured to;

extract a portion of the acquired vibration data of a section region based on a contact of a second object at a first position on the first object,

wherein the section region includes the first position;

determine the first position, on the first object, of the contact of the second object, based on a comparison of the extracted portion of the acquired vibration data and a vibration characteristic of a plurality of vibration characteristics,

wherein the plurality of vibration characteristics are defined for each of a plurality of positions on the first object;

calculate a first velocity of the first object, based on an angular velocity of the at least one sensor and a displacement of the first position from a second position of the at least one sensor;

estimate a second velocity after the contact of the second object with the first object, based on the calculated first velocity of the first object and an effective mass of the first object at the first position;

estimate, based on the estimated second velocity, trajectory information for motion of the second object after the contact with the first object; and

control a display screen to display the estimated trajectory information.

2. The analysis apparatus according to claim 1,

wherein the at least one processor is further configured to:

calculate an impulse corresponding to the contact of the second object with the first object, based on the vibration characteristic and the extracted portion of the acquired vibration data; and

estimate the second velocity after the contact of the second object with the first object, based on the calculated impulse.

3. The analysis apparatus according to claim 2,

wherein the at least one processor is further configured to calculate the impulse from the extracted portion of the acquired vibration data, based on a transfer function included in the vibration characteristic.

4. The analysis apparatus according to claim 1, wherein

the at least one sensor includes a motion sensor configured to acquire motion data indicating a rotation of the first object in the section region of the first object, and

the at least one processor is further configured to:

estimate a posture of the first object based on the motion data, and

estimate the second velocity after the contact of the second object, based on the estimated posture of the first object.

5. The analysis apparatus according to claim 4,

wherein the at least one processor is further configured to:

estimate, based on the estimated posture, a velocity direction of the first object at a time of the contact of the second object with the first object; and

estimate the second velocity after the contact of the second object, based on the estimated velocity direction at the time of the contact of the second object with the first object.

6. The analysis apparatus according to claim 4,

wherein the at least one processor is further configured to:

estimate, based on the estimated posture, a velocity direction of the first object at a time of the contact of the second object with the first object; and

estimate a rotation amount of the second object after the contact of the second object, based on the estimated velocity direction at the time of the contact of the second object with the first object.

7. The analysis apparatus according to claim 1,

wherein the at least one processor is further configured to one of select a restitution coefficient for the contact of the second object with the first object or calculate the restitution coefficient for the contact of the second object with the first object, based on the first position.

8. The analysis apparatus according to claim 7,

wherein the at least one processor is further configured to calculate the restitution coefficient based on the effective mass of the first object at the first position.

9. An analysis method, comprising:

in an analysis apparatus;

acquiring, from at least one sensor, vibration data

that represents vibration generated in a first object;

extracting a portion of the acquired vibration data of a section region based on a contact of a second object at a first position on the first object,

wherein the section region includes the first position;

determining the first position, on the first object, of the contact of the second object, based on a comparison of the extracted portion of the acquired vibration data and a vibration characteristic of a plurality of vibration characteristics,

wherein the plurality of vibration characteristics are defined for each of a plurality of positions on the first object;

calculating a first velocity of the first object, based on an angular velocity of the at least one sensor and a displacement of the first position from a second position of the at least one sensor;

estimating a second velocity after the contact of the second object with the first object, based on the calculated first velocity of the first object and an effective mass of the first object at the first position;

estimating, based on the estimated second velocity, trajectory information for motion of the second object after the contact with the first object; and

controlling a display screen to display the estimated trajectory information.

10. A non-transitory computer-readable medium having stored thereon, computer-executable instructions which, when executed by a computer, cause the computer to execute operations, the operations comprising:

acquiring, from at least one sensor, vibration data

that represents vibration generated in a first object;

extracting a portion of the acquired vibration data of a section region based on a contact of a second object at a first position on the first object,

wherein the section region includes the first position;

determining the first position, on the first object, of the contact of the second object, based on a comparison of the extracted portion of the acquired vibration data and a vibration characteristic of a plurality of vibration characteristics,

wherein the plurality of vibration characteristics are defined for each of a plurality of positions on the first object;

calculating a first velocity of the first object, based on an angular velocity of the at least one sensor and a displacement of the first position from a second position of the at least one sensor;

estimating a second velocity after the contact of the second object with the first object, based on the calculated first velocity of the first object and an effective mass of the first object at the first position;

estimating, based on the estimated second velocity, trajectory information for motion of the second object after the contact with the first object; and

controlling a display screen to display the estimated trajectory information.

11. An analysis apparatus, comprising:

a sensor apparatus that includes;

a first sensor configured to acquire vibration data, based on a contact of a second object at a first position on a first object, wherein the vibration data represents vibration generated in the first object; and

a second sensor configured to acquire motion data indicating a rotation of the first object in the first position; and

at least one processor configured to;

determine the first position, on the first object, of the contact of the second object, based on a comparison of the acquired vibration data and a vibration characteristic of a plurality of vibration characteristics,

wherein the plurality of vibration characteristics are defined for each of a plurality of positions on the first object;

estimate a posture of the first object based on the acquired motion data;

calculate a first velocity of the first object, based on an angular velocity of the sensor apparatus, a displacement of the first position from a second position of the sensor apparatus, and the estimated posture of the first object;

estimate a second velocity after the contact of the second object with the first object, based on the calculated first velocity of the first object and an effective mass of the first object at the first position;

estimate, based on the estimated second velocity, a trajectory for motion of the second object after the contact with the first object; and

control a display screen to display the estimated trajectory.