Support enhancing device and associated method

• US 5,586,067 A
• Filed: 07/19/1994
• Issued: 12/17/1996
• Est. Priority Date: 07/19/1994
• Status: Expired due to Fees

• Current Assignee: Bcam International, Inc. (CellMetrix, Inc.)
• Original Assignee: Bcam International, Inc. (CellMetrix, Inc.)
• Inventors: Gross, Clifford M., Lu, Honzheng, Bo, Lin
• Primary Examiner(s): Voeltz, Emanuel T.
• Assistant Examiner(s): VO, HIEN XUAN
• Application Number:
  US08/277,230
• Time in Patent Office: 882 Days
• Field of Search: 364/558, 364/559, 364/576, 364/508, 364/509, 364/505, 364/506, 324/76.29, 324/76.21, 297/284.1, 73/12.01, 73/12.08, 73/760, 73/172, 73/756, 36/136, 36/132, 36/93, 36/88, 36/71
• US Class Current: 702/139
• CPC Class Codes: A61B 2562/0247 Pressure sensors
• CPC Class Codes: A61B 2562/046 in a matrix array
• CPC Class Codes: A61B 5/1036 Measuring load distribution, e.g. podologic studies
• CPC Class Codes: A61B 5/4528 Joints A61B5/4533, A61B5/4538 take precedence
• CPC Class Codes: A61B 5/6892 Mats
• CPC Class Codes: A61B 5/7257 using Fourier transforms
• CPC Class Codes: A61H 2201/0138 incorporated in furniture
• CPC Class Codes: A61H 2201/0142 Beds
• CPC Class Codes: A61H 2201/0149 Seat or chair
• CPC Class Codes: A61H 2201/5056 pneumatically controlled

Abstract

A device for supporting a human being comprises a superstructure defining a support surface in contact with a body part of a person and measurement componentry on the superstructure for periodically measuring a predetermined biomechanical parameter of the person'"'"'s body part to determine a load distribution on the body part. The measurement componentry includes a fluid filled reservoir at the support surface and a pressure detector in operative engagement with fluid in the reservoir for monitoring changes in the pressure of the fluid, due, for example, to varying loads caused by physical activity. Circuitry is operatively coupled to the pressure detector for monitoring and characterizing changes in pressure of the fluid over time. Form control componentry is disposed on the superstructure and is operatively connected to the measurement componentry for automatically subjecting the support surface, in response to the determined load distribution, to forces tending to modify a contour of the support surface. The form control circuitry may include a pressurization source for modifying a base pressure of the reservoir fluid.

Claims

1. A device for supporting a human being, comprising:

a structure having a configurable contoured support surface;

a sensing device associated with said structure, said sensing device configured to measure an input parameter, reflective of a pressure distribution of a body part of a person;

a memory device for storing optimal comfort data and said pressure distributions determined by said sensing device;

a surface configuration device associated with said structure; and

a processor associated with said sensing device, said memory and said surface configuration device, wherein said processor;

computes a differential pressure and frequency function using pressure distributions determined by said sensing device and stored in said memory device;

determines an optimal pressure distribution for the person'"'"'s body part using the computed differential pressure and frequency function and the optimal comfort data stored in said memory device; and

operates said surface configuration device so as to change a contour of said support surface so that the optimal pressure distribution is enacted on the person'"'"'s body part.

2. The device defined in claim 1 wherein said sensing device includes a fluid filled reservoir at said support surface and a pressure detector in operative engagement with fluid in said reservoir.

3. The device defined in claim 2 wherein said surface configuration device includes means operatively connected to said reservoir for modifying the pressure of said fluid.

4. The device defined in claim 1, wherein said processor includes:

a first circuit configured for determining a measured pressure distribution as a function of time;

a second circuit operatively connected to said first circuit and configured for determining differential pressures and computing a Fourier Transform on the pressure function determined by said first circuit; and

a third circuit operatively connected to said second circuit and said memory device, wherein said third circuit is configured for selecting, from the optimal comfort data stored in said memory device, a comfort pressure distribution based at least in part on a frequency and differential pressure computed by said second circuit.

5. The device defined in claim 1 wherein said surface configuration device includes a fluid filled reservoir at said support surface and means operatively connected to said reservoir for modifying the pressure of said fluid, thereby altering pressure exerted by said support surface on said body part.

6. The device defined in claim 1 wherein said sensing device and said processor include means for monitoring frequency and intensity of impacts on said body part.

7. The device defined in claim 1 wherein said sensing device and said processor include means for monitoring types of motion of said body part.

8. The device defined in claim 1 wherein said structure includes a panel of a shoe, said sensing device and said processor including means for monitoring frequency and intensity of impacts on a foot of the person.

9. The device defined in claim 1 wherein said support surface is a chair back and said sensing device and said processor include means for monitoring biomechanical stress on the person'"'"'s back.

10. A method for supporting a human being, comprising the steps of:

providing a structure defining a configurable contoured support surface;

placing a body part of a person in contact with said support surface;

upon engagement of the body part with said support surface, periodically and automatically measuring an input parameter to determine a pressure on the body part;

automatically determining measured pressure as a function of time and frequency;

storing table of optimal comfort pressures;

automatically selecting, from the table, an optimal comfort pressure; and

automatically subjecting said support surface, in response to the selected optimal comfort pressure, to forces tending to modify a contour of said support surface.

11. The method defined in claim 10 wherein a fluid filled reservoir is provided at said support surface and is coupled with said structure, said step of measuring including the step of detecting pressure of said fluid in said reservoir.

12. The method defined in claim 11 wherein said step of subjecting includes the step of modifying the pressure of said fluid.

13. The method defined in claim 10 wherein said step of automatically determining measured pressure includes the step of:

automatically computing a Fourier Transform on the determined pressure function and determining associated differential pressures.

14. The method defined in claim 10 wherein a fluid filled reservoir is provided at said support surface and is coupled with said structure, said step of subjecting including the step of modifying the pressure of said fluid, thereby altering pressure exerted by said support surface on said body part.

15. The method defined in claim 10 wherein said step of measuring includes the step of periodically and automatically monitoring frequency and intensity of impacts on said body part.

16. The method defined in claim 10 wherein said step of measuring includes the step of periodically and automatically monitoring types of motion of said body part.

17. The method defined in claim 10 wherein said structure includes a panel of a shoe, said step of measuring including the step of monitoring frequency and intensity of impacts on a foot of the person.

18. The method defined in claim 10 wherein said support surface is a chair back and said step of measuring includes the step of monitoring biomechanical stress on the person'"'"'s back.

19. A shoe comprising:

a structure defining a configurable contoured support surface positionable in contact with a person'"'"'s foot;

a sensing device associated with the structure for measuring frequency and magnitude of impacts on the person'"'"'s foot;

a memory device for storing optimal comfort data and the frequency and magnitude of impacts determined by said sensing device;

a surface configuration device associated with said structure; and

a processor associated with said sensing device, said memory device and said surface configuration device, wherein said processor;

computes a differential pressure and frequency function using the frequency and magnitude of impacts measured by said sensing device and stored in said memory device;

determines an optimal comfort, fit or pressure distribution for the person'"'"'s foot using the computed differential pressure and frequency function and the optimal comfort data stored in said memory device; and

operates said surface configuration device so as to change a contour of said support surface so that the optimal comfort, fit or pressure distribution is enacted on the person'"'"'s foot.

22. The device defined in claim 19, wherein said processor includes:

a first circuit configured for determining a measured pressure distribution as a function of time;

a second circuit operatively connected to said first circuit and configured for determining differential pressures and computing a Fourier Transform on the pressure function determined by said first circuit; and

a third circuit operatively connected to said second circuit and said memory, wherein said third circuit is configured for selecting, from the optimal comfort data stored in said memory, a comfort pressure distribution based at least in part on a frequency and differential pressure computed by said second circuit.

23. The device defined in claim 19 wherein said surface configuration device includes a fluid filled reservoir at said support surface and means operatively connected to said reservoir for modifying the pressure of said fluid, thereby altering pressure exerted by said support surface on the person'"'"'s foot.

20. The device defined in claim wherein said sensing device includes a fluid filled reservoir at said support surface and a pressure detector in operative engagement with fluid in said reservoir.

21. The device defined in claim 20 wherein said surface configuration device includes means operatively connected to said reservoir for modifying the pressure of said fluid.

24. A method for studying physical effects of an activity on a human body, comprising the steps of:

providing a structure defining a support surface;

placing a body part of a person in contact with said support surface;

providing a stress detector on said structure so that said detector can measure physical stress in said body part;

upon engagement of said body part with said support surface, operating said detector to periodically and automatically measure physical stress of said body part; and

automatically analyzing physical stress measured during said step of operating to obtain a biomechanical distribution of the measured stress.

25. The method defined in claim 24 wherein said step of analyzing includes the step of automatically characterizing the measured stress as a function of time.

26. The method defined in claim 25 wherein said step of characterizing includes the step of automatically computing a Fourier Transform on the measured stress as a function of time.

27. The method defined in claim 25 wherein said step of analyzing includes the step of identifying the measured stress as falling within one of a plurality of predefined classes of stressing activity.

28. The method defined in claim 24 wherein a fluid filled reservoir is provided at said support surface and is coupled with said structure, said detector being in operative contact with said fluid, and wherein the step of operating includes the step of detecting pressure of said fluid in said reservoir.

29. A method for supporting a human being, comprising the steps of:

providing a structure defining a configurable contoured support surface;

placing a body part of a person in contact with said support surface;

upon engagement of the body part with said support surface, periodically and automatically measuring an input parameter to determine a pressure distribution on the body part;

automatically determining a measured pressure distribution as a function of time;

automatically computing a Fourier Transform on the determined pressure distribution function and determining associated differential pressures;

storing a table of optimal comfort pressure distributions as a function of frequency and differential pressure;

automatically selecting, from the table, an optimal comfort pressure distribution based at least in part on a frequency and differential pressure computed during the step of computing; and

automatically subjecting said support surface, in response to the selected optimal comfort pressure distribution, to forces tending to modify a contour of the support surface.