Physiological measurement device or wearable device interface simulator and method of use

• US 9,032,635 B2
• Filed: 12/14/2012
• Issued: 05/19/2015
• Est. Priority Date: 12/15/2011
• Status: Active Grant

• Current Assignee: Massachusetts Institute of Technology
• Original Assignee: Massachusetts Institute of Technology
• Inventors: Herr, Hugh M., Petron, Arthur
• Primary Examiner(s): FULTON, CHRISTOPHER W
• Application Number:
  US13/715,441
• Publication Number:
  US 20130197318A1
• Time in Patent Office: 886 Days
• Field of Search: 335/142, 335/554, 335/611, 335/612, 335/613
• US Class Current: 33/514.2
• CPC Class Codes: A61B 2562/0247 Pressure sensors
• CPC Class Codes: A61B 2562/046 in a matrix array
• CPC Class Codes: A61B 5/01 Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue clinical contact thermometers G01K13/20
• CPC Class Codes: A61B 5/107 Measuring physical dimensions, e.g. size of the entire body or parts thereof
• CPC Class Codes: A61B 5/1077 Measuring of profiles
• 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 5/4848 Monitoring or testing the effects of treatment, e.g. of medication
• CPC Class Codes: A61B 5/4851 Prosthesis assessment or monitoring
• CPC Class Codes: A61F 2/76 Means for assembling, fitting or testing prostheses, e.g. for measuring or balancing, e.g. alignment means
• CPC Class Codes: A61F 2002/5049 Computer aided shaping, e.g. rapid prototyping
• CPC Class Codes: A61F 2002/762 for measuring dimensions, e.g. a distance

Abstract

A physiological measurement device or wearable device simulator includes a frame and a plurality of surfaces distributed within the frame. For each surface, a surface actuator links the surface of the frame. At least one of: i) force or position imparted by the surface on a physiological feature of a subject by the surface actuator; and ii) the force imparted by the physiological feature of the subject on the surface, can be employed to modulate the positions of the surfaces relative to each other independently of the forces imparted by or on those surfaces, thereby measuring the physiological feature of the subject or simulating a wearable device interface.

Claims

1. A physiological measurement device or wearable device interface simulator, comprising:

a) a frame;

b) a plurality of surfaces distributed within the frame; and

c) for each surface, a surface actuator linking the surface to the frame, the surface actuators modulating independently

i) the forces applied by the surfaces to a subject, and

ii) the positions of the surfaces relative to each other and relative to the subject,

thereby measuring a physiological feature of the subject or simulating a wearable device interface.

2. The device or simulator of claim 1, further including a sensor at at least a portion of the surfaces, whereby feedback from the sensor can be employed to modulate the relative positions of the surfaces.

3. The device or simulator of claim 2, wherein the sensor is a pressure sensor.

4. The device or simulator of claim 2, wherein the sensor is a temperature sensor.

5. The device or simulator of claim 2, wherein the sensor is a position sensor.

6. The device or simulator of claim 2, wherein the modulation of force imparted by at least one of the surfaces is in response to at least one of a) a force applied to the sensor by the subject, and b) a change in position of at least a portion of the surfaces relative to each other, the frame, or relative to the subject.

7. The device or simulator of claim 1, further including at least one frame actuator, wherein position of the frame relative to the subject can be modulated by activating the frame actuator.

8. The device or simulator of claim 1, further including at least one interstitial actuator linking the surface actuators, wherein positions of the surface actuators relative to each other are modulated by activation of the interstitial actuator.

9. The device or simulator of claim 1, wherein the position of the frame is configured to be modulated relative to a physiologic skeletal feature of the subject proximate to the physiological feature of the subject to be measured or simulated.

10. The device or simulator of claim 1, wherein the actuator is configured to modulate the resistive force of the subject.

11. The device or simulator of claim 1, wherein the modulation of the positions of the surfaces is in response to a force upon at least a portion of the surfaces by the subject.

12. The device or simulator of claim 1, wherein the device is further configured to modulate the force imparted by at least a portion of the surfaces on the subject.

13. The device or simulator of claim 12, wherein the modulation of force is at least one member selected from the group consisting of stiffness, damping and impedance.

14. The device or simulator of claim 1, further including a controller that relates the force and positions of each surface to each surface actuator.

15. The device or simulator of claim 14, wherein the controller modulates at least one of the relative positions of the surfaces and the resistive forces applied by the surfaces on the subject.

16. The device or simulator of claim 15, wherein the modulation is of a combination of the relative positions of the surfaces, and the resistive forces applied by the surfaces on the subject.

17. The device or simulator of claim 16, wherein the controller simulates the interface between the surfaces and the physiological subject contacting the surfaces by mapping at least one of the position, force and temperature measured by sensors contacting the subject.

18. The device or simulator of claim 1, wherein the actuator includes a bladder supporting each surface and a potentiometer, wherein the bladder is filled with a gas or an incompressible fluid, and wherein the force imparted by each surface is modulated by modulating the volume of gas or incompressible fluid within the bladder.

19. The device or simulator of claim 1, wherein the actuator includes a motor that is linked to the surface by a screw drive, and at least one of a) a position sensor at the motor to detect the position of the surface, b) a force sensor at the surface or linked to the surface, and c) a temperature sensor at the surface.

20. The device or simulator of claim 1, wherein the surfaces are arrayed in a plane, wherein each surface is normal to the plane, and the surfaces collectively define an opening into which the subject can be placed.

21. The device or simulator of claim 1, wherein the surfaces are arranged three-dimensionally and define a shape such that the surfaces make contact with a subject'"'"'s body.

22. A method for measuring a physiological feature of a subject or simulating an interface of a wearable device, comprising the steps of:

a) placing a plurality of surfaces against a subject, at least a portion of the surfaces each being linked to a frame by a surface actuator; and

b) modulating independently of each other

i) the forces applied by the surfaces to the subject, and

ii) the positions of the surfaces relative to each other and relative to the subject, to thereby measure a physiological feature of the subject or simulate an interface of a wearable device.

23. The method of claim 22, wherein the surfaces are arrayed in a plane, wherein each surface is normal to the plane, and the surfaces collectively define an opening into which the subject can be placed.

24. The method of claim 22, wherein the surfaces are arranged three-dimensionally and define a shape such that the surfaces make contact with a subject'"'"'s body.

25. The method of claim 22, wherein the support includes a frame actuator, and further including the step of activating the frame actuator to modulate the position of the frame relative to the subject.

26. The method of claim 22, wherein the support includes at least one interstitial actuator linking the surface actuators, and further including the step of actuating at least one interstitial actuator to thereby modulate the positions of the surface actuators relative to each other.

27. The method of claim 22, wherein at least a portion of the surfaces each include a sensor, and further including the step of independently modulating the relative positions of, or forces applied by, the surfaces in response to feedback from the sensors.

28. The method of claim 27, wherein the sensor is a pressure sensor.

29. The method of claim 27, wherein the sensor is a thermometer.

30. The method of claim 27, wherein the sensor is a position sensor.

31. The method of claim 27, wherein the modulation includes activating at least a portion of the surface actuators.

32. The method of claim 27, wherein the modulation includes activating at least one frame actuator changing the position of the frame relative to the subject.

33. The method of claim 27, wherein the modulation includes activating at least one interstitial actuator linking surface actuators, thereby modulating the positions of the surface actuators relative to each other.

34. The method of claim 22, further including the step of modulating the position of the frame relative to a physiological skeletal feature of the subject.