Rogowski coil based alarm system
First Claim
Patent Images
1. A coil for sensing a changing current comprising:
- (a) an elongate substantially flexible core material, said elongate substantially flexible core material having a first end portion and a second end portion, said elongate substantially flexible core material having a middle portion between said first end portion and said second end portion, said second end portion at an opposite end of said elongate substantially flexible core material than said first end portion;
(b) an elongate conductive member supported by said middle portion of said substantially flexible core material and encircling said middle portion of said substantially flexible core material;
(c) said first end portion and said second end portion maintained in a position proximate one another;
(d) at least two sensors supported by said substantially flexible core material;
(e) a sensing module that receives a signal from said elongate conductive member and estimates a signal within a conductor at least partially encircled within said elongate substantially flexible core material;
(f) a location module that receives respective location signals from said at least two sensors, wherein said location signals are based upon electrical characteristics of said signal within said conductor, and estimates location information of said conductor at least partially encircled within said elongate substantially flexible core material based upon said respective location signals;
(g) an indicator selectively provided based upon said location of said conductor.
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Accused Products
Abstract
A coil that includes an alarm.
31 Citations
18 Claims
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1. A coil for sensing a changing current comprising:
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(a) an elongate substantially flexible core material, said elongate substantially flexible core material having a first end portion and a second end portion, said elongate substantially flexible core material having a middle portion between said first end portion and said second end portion, said second end portion at an opposite end of said elongate substantially flexible core material than said first end portion; (b) an elongate conductive member supported by said middle portion of said substantially flexible core material and encircling said middle portion of said substantially flexible core material; (c) said first end portion and said second end portion maintained in a position proximate one another; (d) at least two sensors supported by said substantially flexible core material; (e) a sensing module that receives a signal from said elongate conductive member and estimates a signal within a conductor at least partially encircled within said elongate substantially flexible core material; (f) a location module that receives respective location signals from said at least two sensors, wherein said location signals are based upon electrical characteristics of said signal within said conductor, and estimates location information of said conductor at least partially encircled within said elongate substantially flexible core material based upon said respective location signals; (g) an indicator selectively provided based upon said location of said conductor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A coil for sensing a changing current comprising:
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(a) a first elongate substantially flexible core material, said first elongate substantially flexible core material having a first end portion and a second end portion, said first elongate substantially flexible core material having a middle portion between said first end portion and said second end portion, said second end portion at an opposite end of said first elongate substantially flexible core material than said first end portion; (b) a second elongate substantially flexible core material, said second elongate substantially flexible core material having a first end portion and a second end portion, said second elongate substantially flexible core material having a middle portion between said first end portion and said second end portion, said second end portion at an opposite end of said second elongate substantially flexible core material than said first end portion; (c) a third elongate substantially flexible core material, said third elongate substantially flexible core material having a first end portion and a second end portion, said third elongate substantially flexible core material having a middle portion between said first end portion and said second end portion, said second end portion at an opposite end of said third elongate substantially flexible core material than said first end portion; (d) a first elongate conductive member supported by said middle portion of said first substantially flexible core material and encircling said middle portion of said first substantially flexible core material; (e) a second elongate conductive member supported by said middle portion of said second substantially flexible core material and encircling said middle portion of said second substantially flexible core material; (f) a third elongate conductive member supported by said middle portion of said third substantially flexible core material and encircling said middle portion of said third substantially flexible core material; (g) said first end portion and said second end portion of said first elongate conductive member maintained in a position proximate one another; (h) said first end portion and said second end portion of said second elongate conductive member maintained in a position proximate one another; (i) said first end portion and said second end portion of said third elongate conductive member maintained in a position proximate one another; (j) a current sensing module that receives a respective signal from said first and second and third elongate conductive members and estimates a respective signal within a respective first and second and third conductors at least partially encircled within respective said first and second and third elongate substantially flexible core materials; (k) a first and a second and a third current indicators based upon a respective signal from said current sensing module indicating the existence of (1) a first imposed higher frequency signal superimposed on said signal having a lower frequency on said first conductor is sensed for a corresponding first phase, (2) a second imposed higher frequency signal superimposed on said signal having a lower frequency on said second conductor is sensed for a corresponding second phase, and (3) a third imposed higher frequency signal superimposed on said signal having a lower frequency on said third conductor is sensed for a corresponding third phase, where said first phase, said second phase, and said third phase are three phases of a three phase signal. - View Dependent Claims (18)
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Specification