Bi-directional magnetic character reader
View Patent ↗A manually operated document scanner and methods of operation and use are disclosed. The document scanner includes a document bed having a document positioning surface. The document scanner also includes a scanner module slidably attached to the document bed. The scanner module has a magnetic character reader, a first magnet placed along a leading edge of the magnetic character reader in a first direction of travel of the scanner module, and a second magnet placed along a leading edge of the magnetic character reader in a second direction of travel of the scanner module opposite to the first direction of travel.
1. A manually-operable document reader comprising:
a document bed having a document positioning surface;
a scanner module slidably attached to the document bed, the scanner module including:
a magnetic character reader;
a first magnet placed along a leading edge of the magnetic character reader in a first direction of travel of the scanner module;
a second magnet placed along a leading edge of the magnetic character reader in a second direction of travel of the scanner module opposite to the first direction of travel.
2. The document reader of claim 1 , further comprising a contact image sensor incorporated in the scanner module.
3. The document reader of claim 1 , wherein the first magnet is configured to induce a magnetic field on a character printed on a document when the scanner module is passed across the document in the first direction of travel, the magnetic field inducing a signal in the magnetic character reader corresponding to the magnetized character.
4. The document reader of claim 3 , wherein the second magnet is configured to induce a magnetic field on a character printed on a document when the scanner module is passed across the document in the second direction of travel, the magnetic field inducing a second signal in the magnetic character reader which is inverse to the signal corresponding to the magnetized character.
5. The document reader of claim 1 , her comprising circuitry configured to validate a first signal corresponding to a character by comparing the first signal with a second signal.
6. The document reader of claim 5 , wherein the second signal is an inverse of the first signal.
7. A method of reading magnetized characters using a manually operated document reader, the method comprising:
obtaining a signal representative of a magnetized character printed on a document using a manually-operated scanner module passing across a printed document in a first direction, the scanner module including a magnetic character reader;
obtaining a second signal representative of the magnetized character using the manually operated scanner module passing across the printed document in a second direction;
validating the signal using the second signal.
8. The method of claim 7 , wherein validating the signal includes:
inverting the second signal; and
comparing the second signal to the signal.
9. The method of claim 8 , further comprising, upon determining that the inverted second signal does not correspond to the first signal, indicating an error.
10. The method of claim 8 , further comprising, upon determining that the inverted second signal corresponds to the first signal, storing a character in memory corresponding to the magnetized character printed on the document.
11. The method of claim 8 , wherein inverting the second signal includes generating an inverse signal having an opposite position and magnitude of the second signal.
12. The method of claim 11 , wherein inverting the second signal further includes replacing the second signal with the inverse signal.
13. The method of claim 7 , further comprising capturing an image of the document using a contact image sensor integrated into the scanner module.
14. The method of claim 7 , further comprising transmitting the character to a computing system external to the manually operated document reader.
15. A method of operating a manually-operated document reader, the method comprising:
manually passing a scanner module across a document in a first direction to obtain a signal representative of a magnetized character printed on the document, the scanner module including a magnetic character reader; and
passing a scanner module across the document in a second direction opposite to the first direction to obtain a second signal representative of the magnetized character printed on the document.
16. The method of claim 15 , further comprising viewing the character on a display of a computer.
17. The method of claim 15 , further comprising placing the document on a document positioning surface of a document bed.
18. The method of claim 15 , wherein manually passing a scanner module across a document in a first direction includes sliding the scanner module along a length of a document positioning surface of a document bed.