Optical flex sensor

• US 4,542,291 A
• Filed: 09/29/1982
• Issued: 09/17/1985
• Est. Priority Date: 09/29/1982
• Status: Expired due to Term

• Current Assignee: Sun Microsystems Incorporated (Oracle Corporation)
• Original Assignee: VPL Research, Inc.
• Inventors: Zimmerman, Thomas G.
• Primary Examiner(s): Nelms, David C.
• Assistant Examiner(s): Gatto, J.
• Application Number:
  US06/428,322
• Time in Patent Office: 1,084 Days
• Field of Search: 73/760, 73/761, 73/763, 73/768, 73/774, 73/775, 73/800, 340/365 R, 250/231 R, 250/551
• US Class Current: 250/231.1
• CPC Class Codes: A61B 5/1121 Determining geometric values, e.g. centre of rotation or angular range of movement
• CPC Class Codes: A61B 5/1125 Grasping motions of hands
• CPC Class Codes: A61B 5/1126 using a particular sensing technique
• CPC Class Codes: A61B 5/6806 Gloves
• CPC Class Codes: G01B 11/16 for measuring the deformation in a solid, e.g. optical strain gauge
• CPC Class Codes: G01D 5/35345 using Amplitude variations to detect the measured quantity

Abstract

An optical flex sensor is provided and consists of a flexible tube having two ends, a reflective interior wall within the flexible tube and a light source placed within one end of the flexible tube and a photosensitive detector placed within the other end of the flexible tube to detect a combination of direct light rays and reflected rays when the flexible tube is bent.

Claims

1. An optical flex sensor which comprises:

(a) fabric;

(b) a unitary flexible tube component comprising detecting means providing output parameters continuously indicative of the extent of the bending of said tube;

(c) means for securing said flexible tube to said fabric; and

(d) means for transmitting said output parameters to an external device whereby said external device can determine when said fabric and secured flexible tube are bent.

2. An optical flex sensor as recited in claim 1 wherein the fabric is the material out of which a garment is made for a living being.

3. An optical flex sensor as recited in claim 1 wherein the means for securing said flexible tube to said fabric is sewing.

4. An optical flex sensor as recited in claim 1 wherein the means for securing said flexible tube to said fabric is cement.

5. An optical flex sensor as recited in claim 1 wherein the means for transmitting said output parameters to an external device is electrical wires.

6. An optical flex sensor as recited in claim 1 wherein the means for transmitting said output parameters to an external device are optical fibers.

7. An optical flex sensor as recited in claim 2 wherein the fabric is the material out of which a garment is made for a being or creature, further comprises a glove with at least one said flexible tube component secured in proximity to at least one joint.

8. An optical flex sensor as recited in claim 2 wherein the fabric is the material out of which a garment is made for a being or creature, further comprises a body suit with at least one said flexible tube component secured in proximity to at least one joint.

9. An optical flex sensor as recited in claim 2 wherein the fabric is elastic material out of which a garment is made for a being or creature, further comprises an elastic bandage with at least one said flexible tube component secured thereto.

10. An optical flex sensor as in claim 1, wherein said flexible tube component comprises an elongated hollow tube having a pair of opposing ends, a light reflective material wall within said tube, at least one light source placed within a first end of said tube, and a photosensitive detector placed within a second end of said tube to detect the intensity of the combination of direct light rays and reflected light rays impinging thereon and producing a continuous output indicative of the extent of bending of the tube component.

11. An optical flex sensor as in claim 10, wherein the reflective interior wall is coated with a plurality of different colored longitudinal areas, and comprising a corresponding plurality of colored light sources, each light source respectively corresponding to a colored area, whereby said detector can detect the direction of bending of the tube component.