Title :
Dynamic tracking system for home use VTR
Author :
Otsuki, Shinsuke
Author_Institution :
Matsushita Electric Industrial Co. Ltd., Osaka, Japan
fDate :
8/1/1992 12:00:00 AM
Abstract :
A dynamic tracking system without a brush and a slip ring using a moving-magnetic actuator and eddy current sensors was developed for home use videotape recorders (VTRs). The dynamic tracking system was driven in a wide range by the actuator and positioned accurately by the sensors. The actuator had high sensitivity and could keep a stable contact between magnetic tape and heads, allowing for a large travel of ±1 mm. The eddy current sensors are described. The tracking system realized noiseless playback at nine times forward speed and reverse speed on VHS format VTRs
Keywords :
eddy currents; electric actuators; electric sensing devices; position control; video tape recorders; 1 mm; VHS format; dynamic tracking system; eddy current sensors; forward speed; heads; home use VTR; home use videotape recorders; large travel; magnetic tape; moving-magnetic actuator; noiseless playback; position control; reverse speed; stable contact; wide range; Brushes; Circuits; Coils; Eddy currents; Magnetic heads; Microprocessors; Piezoelectric actuators; Sensor systems; Springs; Video recording;
Journal_Title :
Consumer Electronics, IEEE Transactions on
