Body movement analysis system and body movement analysis method

• US 20040034285A1
• Filed: 04/30/2003
• Published: 02/19/2004
• Est. Priority Date: 10/31/2000
• Status: Abandoned Application

• Current Assignee: Takeshi Sahashi
• Original Assignee: Takeshi Sahashi
• Inventors: Sahashi, Takeshi
• Application Number:
  US10/415,777
• Publication Number:
  US 20040034285A1
• Time in Patent Office: Days
• US Class Current: 600/300
• CPC Class Codes: A61B 5/0245 by using sensing means generating electric signals, i.e. ECG signals
• 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: A61B 5/721 using a separate sensor to detect motion or using motion information derived from signals other than the physiological signal to be measured

Abstract

A system and method are provided capable of analyzing body movement using time series data obtained continuously using a sensor measuring biological information other than body movement.

A body analysis system having measuring means for continuously measuring biological information from a body to obtain time series data, and extraction means for extracting low frequency components of a prescribed frequency or lower from the time series data as body movement waveform data, and a body movement analysis method having measuring steps and extraction steps carried out using this body movement analysis system are provided. A low-frequency component generated from body movement is included in the time series data obtained through continuous measurement of biological information from the body. Conventionally, this low frequency component was eliminated as noise. The body movement analysis system and body movement analysis method of the present invention is capable of obtaining body movement waveform data expressing body movement by extracting low frequency components less than or equal to a prescribed frequency from the time series data.

Claims

1. A body movement analysis system comprising measuring means for continuously measuring biological information from a body and obtaining time series data;

and extraction means for extracting low frequency components of a prescribed frequency or lower from the time series data as body movement waveform data.

2. The body movement analysis system as disclosed in claim 1, further comprising low-frequency component strength calculating means for calculating strength of the low-frequency component from the low-frequency component.

3. The body movement analysis system as disclosed in claim 1 or claim 2, further comprising high-amplitude low frequency component strength calculating means for extracting a high-amplitude low-frequency component having a prescribed amplitude or greater from the low frequency component and calculating at least one or more of strength, frequency, and duration of the high-amplitude low-frequency component.

4. The body movement analysis system as disclosed in claim 1, 2, or 3, further comprising display means for displaying extracted body movement waveform data as a body movement waveform image.

5. The body movement analysis system as disclosed in claim 1, 2, 3, or 4, wherein the measuring means is a heartbeat monitor.

6. The body movement analysis system as disclosed in claim 1, 2, 3, or 4, wherein the measuring means is a respiratory monitor.

7. The body movement analysis system as disclosed in claim 1, 2, 3, 4, 5 or 6, wherein the body is the body of a person.

8. The body movement analysis system as disclosed in claim 7, wherein the prescribed frequency is 0.5 Hertz.

9. A body movement analysis method comprising a measurement step for continuously measuring biological information from a body and obtaining time series data;

and an extraction step for extracting low frequency components of a prescribed frequency or lower from the time series data as body movement waveform data.

10. The body movement analysis method as disclosed in claim 9, further comprising a low-frequency component strength calculating step for calculating strength of the low-frequency component from the low-frequency component.

11. The body movement analysis method as disclosed in claim 9 or claim 10, further comprising a high-amplitude low frequency component strength calculating step for extracting a high-amplitude low-frequency component having a prescribed amplitude or greater from the low frequency component and calculating at least one or more of strength, frequency, and duration of the high-amplitude low-frequency component.

12. The body movement analysis system as disclosed in claim 9, 10, or 11, further comprising a display step for displaying extracted body movement waveform data as a body movement waveform image.