System for providing power and data transmission between a door and a frame

• US 9,290,966 B2
• Filed: 06/20/2012
• Issued: 03/22/2016
• Est. Priority Date: 05/15/2009
• Status: Active Grant

• Current Assignee: Hanchett Entry Systems Incorporated (Assa Abloy AB)
• Original Assignee: Hanchett Entry Systems Incorporated (Assa Abloy AB)
• Inventors: Hanchett, Leland J. Jr.
• Primary Examiner(s): CAVALLARI, DANIEL J
• Application Number:
  US13/528,397
• Publication Number:
  US 20120267962A1
• Time in Patent Office: 1,371 Days
• US Class Current: 1/1
• CPC Class Codes: E05B 17/22 Means for operating or controlling lock or fastening device accessories, i.e. other than the fastening members, e.g. switches, indicators E05B39/00 - E05B45/00 take precedence
• CPC Class Codes: E05B 2047/0061 using induction
• CPC Class Codes: G07C 2009/00634 Power supply for the lock
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H04B 5/266 One coil at each side, e.g. with primary and secondary coils
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A system for providing wire-free and contact free electric power and communication connection in a security installation between a door and a frame. The cores, windings, and control circuits of first and second transformers portions are disposed in the frame and the door, respectively. Power applied to the first transformer portion induces a voltage and current in the second transformer portion when the door is in a closed position. Fiber optic cables housed within the transformer portions transmit and receive data between the door and the frame. Power transfer occurs at 100+ KHz and data transfer is in the range of 100 K baud. The transformers portions are compactly constructed and, in one aspect of the invention, may reside in an opening normally occupied by a dead bolt. In another aspect of the invention, the transformer portions are fixed and resonating circuitry is off-tuned to optimize output levels.

Claims

1. A system for providing electric power and communication from a first object to a second object wherein at least one of said first and second objects is moveable with respect to the other, said system comprising:

a transformer assembly including a first transformer portion having a first coil winding and a second transformer portion having a second coil winding, wherein said first transformer portion is configured for being disposed in said first object and wherein said second transformer portion is configured for being disposed in said second object;

a first element configured for receiving said first transformer portion on said first object, said first element including a first contact surface;

a second element configured for being slidably disposed in said second object and for receiving said second transformer portion, said second receiver element including a second contact surface;

a biasing member configured for biasing said second contact surface toward said first contact surface so that said second contact surface engages said first contact surface to define a predetermined gap between said first transformer portion and said second transformer portion;

wherein, when said first contact surface is engaged with said second contact surface, an application of a first alternating electric current through said first coil winding induces a second alternating current in said second coil winding.

2. A system in accordance with claim 1 wherein said first object is a door frame and said second object is a door hinged in said door frame.

3. A system in accordance with claim 1 wherein said first and second transformer portions are a pot core transformer portion.

4. A system in accordance with claim 1 wherein said second contact surface protrudes outwardly from a surface of said second object when said second contact surface is engaged with said first contact surface.

5. A system in accordance with claim 4 wherein said second contact surface includes a ramp taper.

6. A system in accordance with claim 1 wherein said first transformer portion includes a first fiber optic cable and said second transformer portion includes a second fiber optic cable, wherein when said first contact surface is engaged with said second contact surface, end surfaces of said first and second fiber optic cables are aligned so that light emitted from one of said first or second fiber optic cables and received by the other of said first or second fiber optic cables defines a communications signal between said first object and said second object.

7. A system in accordance with claim 2 wherein said door includes a lock body and said door frame includes a striker plate having an aperture, wherein said aperture is sized to receive a lock body deadbolt slide and wherein said first element is disposed in said sized aperture.

8. A system for providing electric power and communication from a first object to a second object wherein at least one of said first and second objects is moveable with respect to the other, comprising:

a) a first transformer portion disposed on said first object adjacent said second object and having a first core half, a first coil winding and a first fiber optic cable;

b) a second transformer portion disposed on said second object adjacent said first object and having a second core half, a second coil winding and a second fiber optic cable;

c) first circuitry connected to said first transformer portion; and

d) second circuitry connected to said second transformer portion;

wherein application of a first alternating electric current through said first coil winding induces a second alternating current in said second coil winding, and

wherein light emission from one of said first or second fiber optic cables and receipt of said light emission by the other of said first or second fiber optic cables defines a communications signal between said first object and said second object.

9. A system in accordance with claim 8 wherein said first object is a door frame and said second object is a door hinged in said door frame.

10. A system in accordance with claim 9 wherein said second transformer portion is positioned in said door to directly oppose said first transformer portion in close proximity thereto only when said door is in a closed position with respect to said frame.

11. A system in accordance with claim 9 wherein said first and second transformer portions are arranged in said door and frame respectively to minimize a gap between said first and second transformer portions when said door is in a closed position in said frame.

12. A system in accordance with claim 8 wherein a first resonance frequency of said first transformer portion is off-tuned from a second resonance frequency of said second transformer portion.

13. A system in accordance with claim 8 wherein said first and second transformer portions each have an external width less than one inch.

14. A system in accordance with claim 8 wherein said communication signals are communicated between said first and second objects up to a rate that is approximately 100 KB.

15. A system in accordance with the system of claim 8, wherein said first and second fiber optic cables are configured for transmitting and receiving data in both directions between said first and second objects.

16. A system for providing electric power and communication from a first object to a second object wherein at least one of said first and second objects is moveable with respect to the other, comprising:

a) a first transformer fixedly disposed on said first object adjacent said second object and having a first core and a first coil winding;

b) a second transformer fixedly disposed on said second object adjacent said first object and having a second core and a second coil winding;

c) first circuitry connected to said first transformer; and

d) second circuitry connected to said second transformer;

wherein application of a first alternating electric current through said first coil winding induces a second alternating current in said second coil winding and wherein a first resonance frequency of said first transformer is off-tuned from a second resonance frequency of said second transformer.

17. A system in accordance with claim 16 wherein said first circuitry comprises a first resonating capacitor wherein capacitance of said first resonating capacitor can be varied to thereby tune the frequency of said first circuitry;

wherein said second circuitry comprises a second resonating capacitor wherein capacitance of said second resonating capacitor can be varied to thereby tune the frequency of said second circuitry; and

wherein each of said first and second resonating capacitors are connected in series with each of said first and second coil windings respectively.

18. A system in accordance with claim 17 wherein said first circuitry comprises:

a fused and protective power circuit;

a timing oscillator; and

a bridge driver;

said fused and protective power circuit having a bridge rectifier coupled to a transient voltage suppressor, said transient voltage suppressor coupled to a voltage regulator, said voltage regulator operatively connected to a decoupling capacitor, to provide a first output voltage across said coupling capacitor;

said power circuit providing said first output voltage to said timing oscillator, said timing oscillator providing a controlled pulse square wave signal across an RC circuit, said controlled pulsed square wave signal having an approximate value of 5 volts; and

said timing oscillator operatively connected to said bridge driver to thereby provide an approximately 24 volt square wave in two phases to drive said first coil winding.

19. A system in accordance with claim 18 wherein said second circuitry comprises:

a second coil winding that is center tapped wherein the full winding of said second coil may be utilized to provide a second output voltage of approximately 24 volts and half of said second coil may be utilized to alternatively provide a second output voltage of approximately 12 volts;

a pair of zener diodes, said zener diodes regulating the appropriate said second output voltage of said second circuitry;

means for providing a ground at either of the anodes of said pair of zener diodes; and

a filter capacitor;

said second coil winding connected at the full winding position to a third resonating capacitor and connected at the half winding position to a fourth resonating capacitor, said third and fourth resonating capacitors operatively connected to said ground providing means to regulate said second output voltage of said second circuit across said filter capacitor, said filter capacitor filtering high frequency ripple on said second output voltage of said second circuit.

20. A system in accordance with claim 16 wherein each of said transformer portions is a pot core transformer portion.