Method of Concurrent Detection for Multiple Light Sources Position by Using the PSD

Abstract

Now, in the field of medical and ergonomics, using a device using a LED and a plurality of two-dimensional PSD camera, we have analyzed the behavior of a person. It is necessary to detect the position of each of the LED, this device, you must synchronize the two-dimensional PSD camera and LED. In this study, we propose a method for detecting the position of the plurality of light sources at the same time without synchronization. After the LED modulated to a plurality of different frequencies and received by the PSD, extracted by the frequency filter. Thus, it is not necessary to synchronize the PSD and the LED, it is possible to detect the position light sources at the same time a plurality for communication without wired or wireless I enabled.