Right angle measurement and positioning device for long objects such as columns, pillars, posts, towers or walls, uses camera, target arrangement with cross hair, and display showing image or deviation from right angle

摘要

A target plate comprising a cross hair is fixed to the measured pillar, with screws (50) and magnets (10). An autofocusing camera (4) is leveled and arranged to detect an image of the target plate (18). A monitor (28) displays the image and the deviation from the desired right angle.