PICKUP DEVICE FOR DETECTING METALLIC MEMBER BY USING HALL SENSOR

摘要

PURPOSE: A pickup device for detecting a metallic member by using a Hall sensor is provided to prevent electronic noise and to improve productivity by reducing malfunction of the pickup device. CONSTITUTION: A pickup device is horizontally installed over a conveyer in order to effectively detect a metallic member. The pickup device includes a Hall device(36) and an excite coil(33) which is coaxially aligned with respect to the HALL device(36) at a peripheral portion of the Hall device(36). The Hall device(36) is driven by a static current source. The excite coil(33) is driven by a power source based on a signal generated from a pulse generator. In order to measure a value of a secondary magnetic field, a ferro magnetic member is attached to a rear surface of the HALL device(36).