Fiber optic occupant or object classification system

• US 6,920,256 B2
• Filed: 06/09/2003
• Issued: 07/19/2005
• Est. Priority Date: 06/09/2003
• Status: Expired due to Fees

• Current Assignee: Key Safety Systems, Inc. (Ningbo Junsheng Investment Group Co., Ltd.)
• Original Assignee: Key Safety Systems, Inc. (Ningbo Junsheng Investment Group Co., Ltd.)
• Inventors: Gosk, Randal, Hossam, Almasri, Murad, Mohannad F., Kempf, Peter C.
• Primary Examiner(s): Bovernick, Rodney
• Assistant Examiner(s): STAHL, MICHAEL J
• Application Number:
  US10/457,189
• Publication Number:
  US 20040247228A1
• Time in Patent Office: 771 Days
• Field of Search: 385/12, 385/13, 25022714-22716, 180271-273, 180/287, 280/728.1, 280/734, 280/735, 297/217.1, 297/217.2
• US Class Current: 385/12
• CPC Class Codes: B60R 2021/01095 optical
• CPC Class Codes: B60R 21/01516 using force or pressure sensing means

Abstract

An occupant classification system comprising: a seat upon which an occupant may sit or on which an object may be placed, the seat having one of a seat cushion and a seat back; at least one optical fiber having a measurable optical characteristic, arranged in a specific pattern, the optical characteristics of the fiber changeable when a force is applied to the fiber; and a processor responsive to an output signal from each fiber for generating a control signal determinative of a physical characteristic of an object or occupant on the seat.

Claims

1. An occupant classification system comprising:

a seat upon which an occupant may sit or on which an object may be placed, the seat having one of a seat cushion and a seat back;

a first set of optical fibers, the first set including individual fibers arranged parallel to one another, a second set of optical fibers arranged at a predetermined angle relative to the first set of optical fibers;

each optical fiber having a measurable optical characteristic, the optical characteristics of the fibers changeable when a force is applied to a particular fiber;

a third set of optical fibers, wherein a particular optical fiber of the third set of fibers extends from a transmitter associated with the first set of optical fibers to a receiver associated with the second set of optical fibers, and

a processor responsive to an output signal from at least one optical fiber for generating a control signal determinative of a physical characteristic of an object or occupant on the seat.

2. The system as defined in claim 1 wherein each fiber of the second set of optical fibers includes a curved portion.

3. The system as defined in claim 1 wherein the third set of optical fibers can be subdivided into two generally equal subsets (300, 310).

4. The system as defined in claim 1 including a fourth set of optical fibers wherein a portion of the fibers of the fourth set of optical fibers connects a specified input end of certain fibers of the first set of fibers to the input end of certain fibers of the second set of fibers.

5. The system as defined in claim 4 wherein a portion of the fourth set of optical fibers connects a specified output end of certain fibers of the first set of fibers to the output end of certain fibers of the second set of fibers.

6. An occupant classification system comprising:

a seat upon which an occupant may sit or on which an object may be placed, the seat having one of a seat cushion and a seat back;

a first set of optical fibers, the first set including individual fibers arranged parallel to one another, a second set of optical fibers arranged at a predetermined angle relative to the first set of optical fibers;

each optical fiber having a measurable optical characteristic, the optical characteristics of a fiber changeable when a force is applied to a particular fiber;

a processor responsive to an output signal from at least one optical fiber for generating a control signal determinative of a physical characteristic of an object or occupant on the seat; and

the first and second sets of fibers are configured into a Cartesian coordinate system.

7. An occupant classification system comprising:

a seat upon which an occupant may sit or on which an object may be placed, the seat having one of a seat cushion and a seat back;

a first set of optical fibers, a second set of optical fibers;

wherein an optical characteristic of a fiber is changeable when a force is applied to the fiber;

the first and second sets of fibers configured into a polar coordinate system; and

a processor responsive to an output signal from at least one optical fiber for generating a control signal determinative of a physical characteristic of an object or occupant on the seat.