Abstract
An independent hardware system based on monocular vision has been built to measure the posture of moving objects suspended. The infrared light source and infrared filter were used to reduce image noise and interference. The six feature points distributing on the different surfaces of the object suspended were determined by PnP problem theory. According to the perspective projection constraints of the 3D coordinates and image coordinates, three posture angles were calculated as the object suspended moved. A verification test has been carried out at the three-axis-turntable to verify the static and dynamic characteristics of the measure system. The results show that the monocular vision system constructed has a good stability of higher measurement accuracy and certain dynamic instantaneity, and may be applied to measure the dynamic posture of the objects suspended.
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