Method and system for a static magnetic read/write head
View Patent ↗The present invention enables reading from and writing onto a magnetic stripe medium with a static read/write head that does not require relative linear motion between the magnetic stripe medium and the head while reading or writing takes place. The reading and writing is accomplished using a stationary uni-dimensional, bi-dimensional, or multi-dimensional conductor array addressing and driving current through an individual conductor element. Reading from magnetic stripe is accomplished by using magnetic flux sensing method such as a fluxgate.
1. A method of statically writing data on a magnetic stripe of a magnetic stripe card that requires no card internal circuitry by externally imposing magnetic field of a given polarity on each selected segment of the magnetic stripe and of reading data by sensing the remanent field of each segment of the magnetic stripe by multiple fluxgate that are sharing a sense coil method that is external to the card such that data on the magnetic stripe can also be read by a swipe magnetic card reader and interpreted as digital bits, comprising:
(i) providing a multi-dimensional conductor array placed proximate to the magnetic stripe where each magnetic stripe segment is associated with at least one conductor;
(ii) providing current drivers for sending currents in controlled directions through the conductor array;
(iii) sending said currents, using said current drivers, through conductors of the array, such that during writing, the composite current in a conductor overcomes the coercivity of a given segment of the magnetic stripe;
(iv) a sense coil wrapped around a ferromagnetic core and shared with the conductor array is used as part of multiple fluxgates that during reading senses at least the polarity of each segment using a fluxgate method while the conductor arrays of each segment, independently, induce flux into the core using current that does not overcome the coercivity of the magnetic stripe;
(v) a magnetic domain matrix addressing method for both reading from and writing onto the magnetic stripe.
2. The method according to claim 1 , wherein the read process utilizes a fluxgate method.
3. The method according to claim 1 , wherein the read process utilizes a modified fluxgate method.
4. The method according to claim 1 , wherein each segment is a magnetic domain, and wherein data read from two succeeding domains corresponds to one bit.
5. The method according to claim 1 , wherein said data bits comply with the Aiken Biphase code.
6. The method according to claim 1 , wherein said multi-dimensional conductor array is a uni-dimensional conductor array.
7. The method according to claim 1 , wherein said multi-dimensional conductor array is a two-dimensional matrix conductor array.
8. The method according to claim 1 , wherein said multi-dimensional conductor array is a two-dimensional matrix conductor array with current steering mechanism.
9. The method according to claim 1 , wherein a track of magnetic stripe complies with the American National Standards Institute (ANSI) & ISO/IEC.
10. The method according to claim 1 , wherein the read process utilizes multiple sense coils such as a sense coil corresponding to a drive coil.
11. The method according to claim 1 , wherein the read process utilizes multiple sense coils such as one sense coil corresponding to each drive coil and the two coils are merged into one.
12. A method of statically writing data on a magnetic stripe of a magnetic stripe card that requires no card internal circuitry by externally imposing magnetic field of a given polarity on each selected segment of the magnetic stripe and of reading data by sensing the remanent field of each segment of the magnetic stripe by the Hall Effect method such that data on the magnetic stripe can also be read by a swipe magnetic card reader and interpreted as digital bits, comprising:
(i) providing a multi-dimensional conductor array placed proximate to the magnetic stripe where each magnetic stripe segment is associated with at least one conductor
(ii) providing current drivers for sending currents in controlled directions through the conductor array;
(iii) sending said currents, using current drivers, through conductors of the array, such that during writing, the composite current in a conductor overcomes the coercivity of a given segment of the magnetic stripe;
(iv) voltage sensing across each segment of the conductor array is used as part of multiple Hall Effect sensors that during reading determines at least the polarity of each segment using the Hall Effect method while the conductor arrays of each segment independently carry current that does not overcome the coercivity of the magnetic stripe;
(v) a magnetic domain matrix addressing method for both reading from and writing onto the magnetic stripe.
13. The method according to claim 12 , wherein the read process utilizes a capacitive coupling for Hall Effect output voltage sensing.
14. The method according to claim 12 , wherein said multi-dimensional conductor array is a two-dimensional matrix conductor array with current steering mechanism.
15. A system for statically writing data on a magnetic stripe of a magnetic stripe card that requires no card internal circuitry by externally imposing magnetic field of a given polarity on each selected segment of the magnetic stripe, and of reading data by sensing the remanent field of each segment of the magnetic stripe by multiple fluxgate constructed with a sense coil that is external to the card such that data on the magnetic stripe can also be read by a swipe magnetic card reader and interpreted as digital bits, comprising:
(i) a multi-dimensional conductor array placed proximate to the magnetic stripe while each segment is associated with at least one conductor;
(ii) current drivers for sending currents in controlled directions through the conductor array;
(iii) a device for sending said currents, using said current drivers, through conductors of the array, such that during writing, the composite current in a conductor overcomes the coercivity of a given segment of the magnetic stripe;
(iv) a sense coil wrapped around a high permeability core that is shared with the conductor array, that during the reading process senses at least the polarity of each segment using a fluxgate method while the conductor arrays of each segment, independently, induces flux into the core using current that does not overcome the coercivity of the magnetic stripe;
(v) a magnetic domain matrix addressing mechanism for both reading from and writing onto the magnetic stripe.
16. The system according to claim 15 , wherein the read process utilizes a fluxgate method.
17. The system according to claim 15 , wherein the read process utilizes a modified fluxgate method.
18. The system according to claim 15 , wherein the read process utilizes multiple sense coils such as a sense coil corresponding to a drive coil.
19. The system according to claim 15 , wherein the read process utilizes multiple sense coils such as one sense coil corresponding to each drive coil and the two coils are merged into one.
20. The system according to claim 15 , wherein said multi-dimensional conductor array is a two-dimensional matrix conductor array with current steering mechanism.