INFORMATION TRANSMITTING DEVICE OF LOOP COIL SYSTEM

• Main Authors: KOBAYASHI YOSHIROU, SAWADA YASUO
• Format: Patent
• Language: English
• Published: 25.06.1983
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION

PURPOSE:To eliminate a blind sector near a transposition point, by providing a short loop coil surrounding the transposition point of a main loop coil for information transmission to a moving material and flowing currents having a required phase difference to these coils. CONSTITUTION:A main loop coil 1 where a current as information is flowed is transposed at a transposition point 2, and a short loop coil 3 is provided surrounding this transposition point. Currents having a prescribed phase difference other than 180 deg. are flowed to coils 1 and 3 by a phase shifter 4. When a receiving antenna 5 is moved from a point A to a point E, a synthesized loop coil current in the sight from the receiving antenna is (a) at the point A if the current at the point A is defined as a reference vector, and the synthesized loop coil current is (b) at the point B because currents of coils 1 and 3 are synthesized, and this current is (c) at a point C because currents of the transposed coil 1 are cancelled, and this current is (d) at a point D, and this current is (e) at a point E, and thus, the current is not broken even if the antenna 5 passes through the transposition point.