SPEED DOME CAMERA MODULE SMOOTHLY DRIVE PAN AND TILT MOTORS

摘要

PURPOSE: A speed dome camera module is provided to smoothly drive pan and tilt motors by accurately calculating a rotation reference position of a motor without error. CONSTITUTION: A camera supporting part(100) supports a camera board. A PCB supporting part(100b) is formed at one end of the camera supporting part. A tilt supporting part(100a) is formed at the other end of the camera supporting part. A tilt driving pulley is installed on an axis same with a tilt motor(115) in a tilt direction rotation driving unit. A tilt timing belt(116) is installed in the tilt direction rotation driving unit to transmit the rotation force of the tilt driving pulley to a tilt slave pulley(117). A tilt bearing(113) is installed in the tilt direction rotation driving unit to fix and support the tilt slave pulley to a tilt main supporting part. A contact asperity part(111) is formed in the tilt direction rotation driving unit to hold the rotation reference position of the tilt motor. A guide hole(112) is formed in the tilt main supporting part to guide the rotation position of the contact asperity part. A micro switch(114) is installed in the most end part of the guide hole to inform the reference position of the contact asperity part. A pan driving pulley(125a) is installed on an axis same with a pan motor(125) in a pan direction rotation driving part. A pan timing belt(126) is installed in the pan direction rotation driving part to transmit the rotation force of the pan driving pulley to a pan slave pulley. A pan bearing(123) is installed in the pan direction rotation driving part to fix and support the pan slave pulley to a pan supporting part. A reference asperity part(121) is formed at one side of the pan slave pulley to hold the rotation reference position of the pan motor. A photo coupler(124) is formed in one surface of the pan slave pulley to sense the position state of the reference asperity part.