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The traditional ruler has limitation in the aspect of inconvenient to carry and depending on the people directly involved in.So we have designed the MagicRuler.MagicRuler can display the length and angle scale by the infrared projector with smart shape.It does not rely on the direct involvement of the human hand which makes the measurement more flexible.At the same time it can be a proportional scaling through the knob and the measurement range be extended by MagicRuler.In order to improve the measurement of convenience,we set up pen and capacitance pen on the upper and lower part of it which can record and operate this electronic equipment.
Xi'an University of Technology