With the advancement of science and technology,ultrasonic positioning technology is useful in many scenar-ios.In this paper,a new ultrasonic indoor positioning system is designed and implemented by combining infrared ranging and ultrasonic technology.The STC89C52 single chip microcomputer is used as the main control chip of the system,which consists of four nodes hanging in the fixed position in the air and one node moving in the two-dimensional rectangular co-ordinate system on the ground.By recording the coordinate position,the user can describe the positioning information of the current object.
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