Wearable body-fat sensor

• US 6,718,200 B2
• Filed: 04/04/2002
• Issued: 04/06/2004
• Est. Priority Date: 04/10/2001
• Status: Expired due to Term

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Vu, Giang, Marmaropoulos, George, van Heerden, Clive
• Primary Examiner(s): Marmor, Charles
• Application Number:
  US10/116,549
• Publication Number:
  US 20020169387A1
• Time in Patent Office: 733 Days
• Field of Search: 600/547, 600/587, 600/506, 600/507, 2/1, 2 6/9, 734/33, 177/4, 177/5, 177/245, 128/897, 128/898, 128/920
• US Class Current: 600/547
• CPC Class Codes: A61B 5/0537 Measuring body composition by impedance, e.g. tissue hydration or fat content
• CPC Class Codes: A61B 5/4872 Body fat
• CPC Class Codes: A61B 5/6804 Garments; Clothes
• CPC Class Codes: A61B 5/6805 Vests
• CPC Class Codes: A61B 5/6807 Footwear
• CPC Class Codes: G01G 19/50 having additional measuring devices, e.g. for height

Abstract

A wearable garment having an electrode and sensors mounted in a predetermined position relative to the wearer'"'"'s skin provides a quick and efficient way to measure the body-fat composition of the person. The body-fat sensor includes a pair of shoes having a weight-measuring sensor and a wearable body structure, of flexible material, having an inner surface, wherein a flexible electrical conductor is affixed to the inner surface of the wearable body structure. The body-fat sensor further includes an impedance-measuring circuit having at least one pair of electrodes, where the pair of electrodes is electrically coupled to both ends of the electrical conductor, so that the body-fat composition of the person can be measured based on the data received from the weight sensor and the impedance-measuring circuit.

Claims

1. An apparatus for detecting the body-fat composition of a person, comprising:

a wearable body structure, of flexible material, having an inner surface;

a flexible electrical conductor affixed to said inner surface, said conductor having a first-end portion and a second-end portion;

an electronic circuit having at least one pair of electrodes electrically and mechanically affixed to said inner surface of said wearable body structure, said pairs of electrodes being electrically coupled to said first end of said electrical conductor and said second end of said electrical conductor;

a weight sensor for measuring the weight of said person; and

,

said electronic circuit operative to determine the body-fat composition based on the impedance measured across said pairs of electrodes, the weight of said person, and a predetermined data relating to said person.

2. The apparatus of claim 1, wherein said electrical conductor is integrated into the flexible material of said wearable body structure in the form of fibers of conductive material supported by fibers of substantially non-conductive material.

3. The apparatus of claim 1, wherein said electrical conductor is printed on said inner surface of said wearable body structure in the form of electrically-conductive coating material.

4. The apparatus of claim 1, further comprising a display for displaying the body-fat composition of said person.

5. The apparatus of claim 1, further comprising a power source for providing an electrical flow between said pair of electrodes.

6. The apparatus of claim 1, further comprising at least one pair of shoes containing said weight sensor therein.

7. The apparatus of claim 5, wherein said pair of electrodes is provided in said shoes for contact with a right sole and a left sole for measuring the impedance based on a voltage difference between said pair of electrodes.

8. The apparatus of claim 1, wherein said pair of electrodes is formed to contact a right palm and a left palm when said person wears said wearable body structure.

9. The apparatus of claim 1, wherein said pair of electrodes is formed to contact a right ankle and a left ankle when said person wears said wearable body structure.

10. The apparatus of claim 1, wherein said predetermined data includes height age, and sex of said person.

11. An apparatus for detecting a body-fat composition of a person, comprising:

a pair of shoes having a weight sensor;

a wearable body structure, of flexible material, having an inner surface;

a flexible electrical conductor affixed to said inner surface, said conductor having a first-end portion and a second-end portion;

an impedance-measuring circuit having at least one pair of electrodes, said pairs of electrodes being electrically coupled to said first end of said electrical conductor and said second end of said electrical conductor;

a memory for storing data, which includes height, age, and sex of said person; and

, a controller for processing data received from said weight sensor, said impedance-measuring circuit, and said memory to determine the body-fat composition of said person.

12. The apparatus of claim 11, further comprising a display for displaying the body-fat composition of said person.

13. The apparatus of claim 11, further comprising a power source for providing an electrical flow between said pair of electrodes.

14. The apparatus of claim 11, wherein said pair of electrodes is provided in said shoes for contact with a right sole and a left sole for measuring the impedance based on a voltage difference between said pair of electrodes.

15. The apparatus of claim 11, wherein said pair of electrodes is formed to contact a right palm and a left palm when said person wears said wearable body structure.

16. The apparatus of claim 11, wherein said pair of electrodes is formed to contact a right ankle and a left ankle when said person wears said wearable body structure.

17. The apparatus of claim 11, wherein said electrical conductor is integrated into the flexible material of said wearable body structure in the form of fibers of conductive material supported by fibers of substantially non-conductive material.

18. The apparatus of claim 11, wherein said electrical conductor is printed on said inner surface of said wearable body structure in the form of electrically conductive coating material.

20. The method of claim 18, further comprising the step of wearing a garment structure having a flexible electrical conductor coupled to a second pair of electrodes at both ends thereof, thereby making contact with a right wrist and a left wrist on said second pair of electrodes and repeating steps (c) through (e).

21. The method of claim 20, further comprising the step of displaying said body-fat percentage of said person.

19. A method for measuring the body-fat composition of a person, the method comprising the steps of:

(a) inputting height, sex, and age of said person to a controller;

(b) standing on a pair of shoes having a weight-measuring sensor to measure the weight of said person and to contact a right sole and a left sole on a pair of electrodes;

(c) providing an electrical path between said pairs of electrodes;

(d) detecting a voltage difference between said pair of electrodes to measure an impedance by means of an impedance-measuring circuit; and

,

(e) calculating a body-fat percentage by means of said controller.