The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 01, 2013
Filed:
Nov. 06, 2009
Steven B. Leeb, Belmont, MA (US);
Zachary A. Clifford, Norwich, CT (US);
John J. Cooley, Cambridge, MA (US);
Al-thaddeus Avestruz, Waltham, MA (US);
Steven B. Leeb, Belmont, MA (US);
Zachary A. Clifford, Norwich, CT (US);
John J. Cooley, Cambridge, MA (US);
Al-Thaddeus Avestruz, Waltham, MA (US);
Massachusetts Institute of Technology, Cambridge, MA (US);
Abstract
Methods and apparatus for non-intrusive power monitoring and current measurement in a circuit breaker without modification of the breaker panel or the circuit breaker itself. In one example, an inductive pickup sensor senses current from the breaker face, an inductive link transmits power through a steel breaker panel door, and a passive balanced JFET modulator circuit modulates a carrier signal on the inductive link with information regarding the sensed current. A demodulated breaker current signal is available outside of the breaker panel door. The JFET modulator circuit does not require DC power to modulate the carrier signal with the information regarding the sensed current from the breaker. Such methods and apparatus may be interfaced with a spectral envelope load detection system that can monitor multiple loads from a central location.