| 摘要 |
THE COIN IDENTIFICATION DEVICE COMPRISES A GRAVITY FED CHUTE STRUCTURE (40) HAVING AN OPENING (41) FOR RECEIVING A COIN (63) TO BE IDENTIFIED, WALLS TO (42, 43, 44, 45) GUIDE THE COIN (63) AS IT MOVES THROUGH THE CHUTE (40) AND AN OPENING (46) FOR THE COIN (63) TO EXIT. A WAKE-UP CIRCUIT (14) ITH SENSING COILS (21, 22) MOUNTED NEAR THE CHUTE OPENING (41) PROVIDES AN OUTPUT SIGNAL WHEN THE PRESENCE OF A COIN (63) IS DETECTED. TOW COIN SENSING CIRCUITS (15, 16), EACH HAVING AN OSCILATTOR (18, 20) WITH A PARTICULAR COIL ARRANGEMENT (17, 19) ARE USED TO SENSE THE CHARACTERISTICS OF THE COIN (63) PASSING THROUGH THEM. THE FIRST COIN SENSING CIRCUIT INCLUDES A COIL ARRANGEMENT (19) HAVING A COIL MOUNTED ON THE CHUTE (40) WITH ITS AXIS IN THE DIRECTION OF THE COIN (63) PATH SUCH THAT THE COIN (63) WILL PASS THROUGH IT AND FORMING PART OF A FIRST OSCILLATOR (20) TO CREATE LINES OF FLUX PARALLEL TO THE COIN PATH. THE SECOND COIN SENSING CIRCUIT (15) INCLUDES A COIL ARRANGEMENT (17) HAVING A COIL MOUNTED ON A U-SHAPED CORE (51, 52, 53) WITH TWO SUBSTANTIALLY PARALLEL LEGS (52, 53) CONNECTED AT ONE END BY AN ARM (51) THAT IS MOUNTED ABOUT THE CHUTE (40) TO HAVE THE COIN (63) PASS IN THE GAP BETWEEN THE CORE LEGS (52, 53). THE SECOND COIL ARRANGEMENT (15) FORMS PART OF A SECOND OSCILLATOR (18) TO CREATE LINES FLUX PERPENDICULAR TO THE PALNE OF THE COIN PASSING THROUGH THE CHUTE (40). THE FIRST AND SECOND OSCILLATORS (20, 18) ARE ADAPTED TO OSCILLATE AT ONE OR MORE BASE FREQUENCIES. THE FREQUENCY SHIFT OF THE FIRST OSCILLATOR (20) IS MEASURED AS THE COIN (63) PASSES THROUGH THE FISRT MAGNETIC FIELD AND THE FREQUENCY SHIFT OF THE SECOND OSCILLATOR (18) IS MEASURED AS THE COIN PASSES (63) THROUGH THE SECONDMAGNETIC FIELD TO GENERATE SIGNATURES OF THE COIN CHARACTERISTICS. A MICROPROCESSOR (11) COMPARES THE GENERATED SIGNATURES TO KNOWN COIN SIGNATURES TO IDENTITY OF THE COIN (63).(FIG 4)
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