Obscured feature detector housing

• US 8,669,772 B2
• Filed: 03/03/2011
• Issued: 03/11/2014
• Est. Priority Date: 03/04/2010
• Status: Active Grant

• Current Assignee: Franklin Sensors Inc.
• Original Assignee: Franklin Sensors Inc.
• Inventors: Dorrough, David M.
• Primary Examiner(s): NGUYEN, HOAI AN D
• Application Number:
  US13/040,218
• Publication Number:
  US 20110215816A1
• Time in Patent Office: 1,104 Days
• Field of Search: 324/663, 324/658, 324/649, 324/600, 324/67, 324/66, 324/326, 332/86, 333/32, 333/54, 336/66
• US Class Current: 324/663
• CPC Class Codes: G01N 27/22 by investigating capacitance
• CPC Class Codes: G01N 27/221 by investigating the dielectric properties using microwaves G01N22/00; measuring loss factors or dielectric constants per se G01R27/26
• CPC Class Codes: G01R 27/26 Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
• CPC Class Codes: G01R 27/2605 Measuring capacitance capacitive sensors G01D5/24
• CPC Class Codes: G01V 3/08 operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices with electromagnetic waves G01V3/12
• CPC Class Codes: G01V 3/15 specially adapted for use during transport, e.g. by a person, vehicle or boat

Abstract

A surface-conforming obscured feature detector includes a plurality of sensor plates, each having a capacitance that varies based on the dielectric constant of the materials that compose the surrounding objects and the proximity of those objects. A sensing circuit is coupled to the sensor plates 32 to measure the capacitances of the sensor plates. A controller is coupled to the sensing circuit to analyze the capacitances measured by the sensing circuit. One or a plurality of indicators are coupled to the controller, and are selectively activated to identify the location of an obscured feature behind a surface.

Claims

1. An obscured feature detector comprising:

an array of a plurality of sensor plates, the sensor plates being arranged in series along an array axis, each sensor plate having a capacitance that varies based on;

(a) the proximity of the sensor plates to one or more surrounding objects, and (b) the dielectric constant(s) of the surrounding object(s);

a sensing circuit coupled to the sensor plates, the sensing circuit being configured to measure the capacitance of each of the sensor plates;

a controller coupled to the sensing circuit, the controller being configured to analyze the capacitances measured by the sensing circuit;

the array of sensor plates and the sensing circuit being supported by a housing that includes a gripping surface;

the array of sensor plates being arranged in series;

the gripping surface being largely parallel to the axis of the array of sensor plates such that the axis of the array of sensor plates and the gripping surface are largely parallel;

one or a plurality of indicators coupled to the controller, each indicator capable of toggling between a deactivated state and an activated state; and

wherein the controller is configured to activate one or more of the indicators to identify a location of an obscured feature.

2. The obscured feature detector of claim 1, where the gripping surface that is oriented such that when the detector is held on a wall in a position to detect vertical studs, four or more fingers are lined up with an orientation that is more horizontal than vertical.

3. The obscured feature detector of claim 1, wherein the housing comprises plastic.

4. The obscured feature detector of claim 1, wherein the gripping surface comprises an elastomer.

5. The obscured feature detector of claim 1, wherein the gripping surface is a curved surface.

6. The obscured feature detector of claim 1, wherein the gripping surface is a flat surface.

7. A method for using an obscured object detector with a plurality of sensor plates to detect an object behind an obscuring surface comprising:

orienting the obscured object detector on the obscuring surface such that the plurality of sensor plates define an array having an axis that is substantially horizontal; and

gripping the obscured object detector on a predefined gripping region defined on an exterior surface of the obscured object detector, wherein the gripping regions are substantially parallel to the axis of the sensor plate array.

8. An obscured feature detector comprising:

a plurality of sensor plates, arranged in series along an array axis, each sensor plate having a capacitance that varies based on;

(a) the proximity of the sensor plates to one or more surrounding objects, and (b) the dielectric constant(s) of the surrounding object(s);

the detector having a housing comprising a bottom portion that houses the plurality of sensor plates, and a gripping surface that is oriented substantially parallel to the axis of the array; and

a layer of material attached to the bottom portion of the detector, wherein the material comprises plastic.

9. The obscured feature detector of claim 8 further comprising:

a sensing circuit coupled to the sensor plates, the sensing circuit being configured to measure the capacitances of the sensor plates;

a controller coupled to the sensing circuit, the controller being configured to analyze the capacitances measured by the sensing circuit; and

one or a plurality of indicators coupled to the controller, each indicator capable of toggling between a deactivated state and an activated state,

wherein the controller is configured to activate one or more of the indicators to identify a location of an obscured feature.

10. The obscured feature detector of claim 8 wherein the layer of material comprises ultra-high molecular weight polyethylene.