Light emitting diode positioning system based on a lamp stripe

Because traditional indoor locations of visible light usually need improvement in terms of the lighting environment and changes to the layout of light emitting diodes (LEDs), we propose a method that uses a lamp stripe mounted to the wall to send signals and uses an iterative method to estimate the distance between the photodetector (PD) and the lamp stripe, then the position of PD is obtained by geometric method. This method can adjust the position of PD without changing the original lighting layout, thus greatly reducing the workload of changing the layout of LEDs in traditional indoor visible light positioning methods. A positioning accuracy of 0.12 m is obtained in a 2 m × 2 m area. This method can be used in some applications that require only two-dimensional positioning, such as sweeping robots and automated guided vehicles.