Reducing movement and electrostatic interference in a non-resistive contact sensor assembly

• US 9,157,946 B2
• Filed: 03/18/2013
• Issued: 10/13/2015
• Est. Priority Date: 07/13/2012
• Status: Active Grant

• Current Assignee: Rescon Ltd.
• Original Assignee: Rescon Ltd.
• Inventors: Dawson, Thomas Andrew, Macedonia, Christian
• Primary Examiner(s): Nguyen, Hoai-An D
• Assistant Examiner(s): RODAK, LEE E
• Application Number:
  US13/846,263
• Publication Number:
  US 20140152319A1
• Time in Patent Office: 939 Days
• Field of Search: 600/372, 600382-392, 324509-628, 324658-670, 324686-688, 324691-696, 324/457, 607/6, 607/27, 607/28, 607/52
• US Class Current: 1/1
• CPC Class Codes: A61B 2562/0214 Capacitive electrodes
• CPC Class Codes: A61B 2562/182 Electrical shielding, e.g. using a Faraday cage
• CPC Class Codes: A61B 5/24 Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
• CPC Class Codes: A61B 5/6831 Straps, bands or harnesses
• CPC Class Codes: A61B 5/7207 of noise induced by motion artifacts
• CPC Class Codes: G01R 27/2605 Measuring capacitance capacitive sensors G01D5/24
• CPC Class Codes: G01R 29/12 Measuring electrostatic fields or voltage-potential

Abstract

A non-resistive contact sensor assembly, includes a non-resistive contact sensor device, a first inner region of material in which the sensor device is surrounded or embedded, a boundary region, around the first inner region, that is at least partly comprised of a conducting material and that picks up electrical charge from the first inner region, a second inner region around the boundary region, an outer region around the second inner region, and at least one diode, disposed in the second inner region and connected between the boundary region through the second inner region to the outer region.

Claims

1. A non-resistive contact sensor assembly, comprising:

(a) a non-resistive contact sensor device;

(b) a first inner region of material in which the sensor device is surrounded or embedded, the first inner region of material comprising a triboelectrically neutral material to minimize contact electrification arising from movement;

(c) a first boundary region, surrounding the first inner region and comprising a conductive material,

(d) a second inner region around the boundary region, the second inner region also comprising a triboelectrically neutral to minimize contact electrification arising from movement;

(e) a second boundary region surrounding the second inner region; and

(f) at least one diode, disposed in the second inner region and connected between the first boundary region through the second inner region to the second boundary region, the diode arranged to transfer electrostatic charge from the first boundary region to the second boundary region but not from the second boundary region to the first boundary region.

2. The non-resistive contact sensor assembly of claim 1, wherein the second boundary region comprises a conductive material.

3. The non-resistive contact sensor assembly of claim 1, wherein at least one of the first inner region, the second inner region, and the second boundary region includes an elastic material that acts to hold the sensor device in place, thereby minimizing the likelihood of sensor movement against the object surface and leading, in turn, to less chance of contact electrification and movement artifacts.

4. The non-resistive contact sensor assembly of claim 1, wherein at least one of the first inner region, the second inner region, and the second boundary region includes a biasing structure that acts to hold the sensor device in place, thereby minimizing the likelihood of sensor movement against the object surface and leading, in turn, to less chance of contact electrification and movement artifacts.

5. The non-resistive contact sensor assembly of claim 4, wherein the biasing structure includes a spring.

6. The non-resistive contact sensor assembly of claim 1, wherein at least one of the first inner region and the second inner region includes a conductive material.

7. The non-resistive contact sensor assembly of claim 1, wherein the first inner region comprises cotton.

8. The non-resistive contact sensor assembly of claim 7, wherein the second inner region comprises cotton.

9. The non-resistive contact sensor assembly of claim 1, wherein the first inner region comprises leather.

10. The non-resistive contact sensor assembly of claim 9, wherein the second inner region comprises leather.

11. The non-resistive contact sensor assembly of claim 1, further comprising a housing containing the non-resistive contact sensor assembly.

12. The non-resistive contact sensor assembly of claim 1, wherein the at least one diode comprises a network of diodes, each diode arranged to transfer electrostatic charge from the first boundary region to the second boundary region but not from the second boundary region to the first boundary region.

13. A non-resistive contact sensor assembly, comprising:

(a) a non-resistive contact sensor device;

(b) a first inner region of material in which the sensor device is surrounded or embedded, the first inner region of material comprising an anti-triboelectric material to minimize contact electrification arising from movement;

(c) a first boundary region surrounding the first inner region and comprising a conductive material;

(d) a second inner region around the boundary region, the second inner region also comprising an anti-triboelectric material to minimize contact electrification arising from movement;

(e) a second boundary region surrounding the second inner region; and

(f) at least one diode, disposed in the second inner region and connected between the first boundary region through the second inner region to the second boundary region, the diode arranged to transfer electrostatic charge from the first boundary region to the second boundary region but not from the second boundary region to the first boundary region.

14. The non-resistive contact sensor assembly of claim 13, wherein the second boundary region comprises a conductive material.

15. The non-resistive contact sensor assembly of claim 13, wherein at least one of the first inner region, the second inner region, and the second boundary region includes an elastic material that acts to hold the sensor device in place, thereby minimizing the likelihood of sensor movement against the object surface and leading, in turn, to less chance of contact electrification and movement artifacts.

16. The non-resistive contact sensor assembly of claim 13, wherein at least one of the first inner region, the second inner region, and the second boundary region includes a biasing structure that acts to hold the sensor device in place, thereby minimizing the likelihood of sensor movement against the object surface and leading, in turn, to less chance of contact electrification and movement artifacts.

17. The non-resistive contact sensor assembly of claim 16, wherein the biasing structure includes a spring.

18. The non-resistive contact sensor assembly of claim 16, wherein the at least one diode comprises a network of diodes, each diode arranged to transfer electrostatic charge from the first boundary region to the second boundary region but not from the second boundary region to the first boundary region.

19. The non-resistive contact sensor assembly of claim 13, wherein the first inner region and the second inner region includes a conductive material.

20. The non-resistive contact sensor assembly of claim 13, further comprising a housing containing the non-resistive contact sensor assembly.