G - Physics – 01 – B
Patent
G - Physics
01
B
354/25, 73/69, 3
G01B 7/16 (2006.01) G01B 7/04 (2006.01)
Patent
CA 1175928
ABSTRACT OF THE DISCLOSURE Method of measuring a stretch of a conveyor belt, wherein opposite ends of a belt having embedded therein steel cord cores in the longitudinal direction thereof are joined to each other, including: previously providing mangnetic marks at two positions spaced apart a given distance from each other and interposing a joint of the steel cord cores of the conveyor belt therebetween; disposing two magnetic sensors spaced a given distance apart from each other in the running direction of the conveyor belt, in ad adjacent but non-contact relation with the conveyor belt; detecting a period of time during which either one o-E the two magnetic marks moves across the two magnetic sensors during running of the conveyor belt and measuring the running speed of the conveyor belt based on the period of time and a distance across the two magnetic sensors; detecting also during running of the conveyor belt a time at which one of the magnetic marks in front in the running direction of the conveyor belt reaches one of the magnetic sensors in front in the running direction of the conveyor belt and a time at which the other of the magnetic marks in the rear in the running direction of the conveyor belt reaches the other of the magnetic sensors in the rear in the running direction of the conveyor belt and measuring a difference in time therebetween; and calculating a value of stretch between the magnetic marks of the conveyor belt based on the measured running speed of the conveyor belt, the value of difference in time, a ratio between the distance across the magnetic marks and the distance across the magnetic sensors. - 12 -
385258
Serikawa Haruyuki
Suzuki Isao
Bridgestone Tire Company Limited
Robic Robic & Associes/associates
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