We proposed and designed simple circuits and network for detection of an approaching object based on visual systems of insects. The locusts detect the approaching object by sensing of the increase in the size and expansion velocity of the projected image on their retina. Results with the simulation program of integrated circuit emphasis(SPICE)indicated that the proposed network which is constructed with simple circuits can detect an approaching object. This network could detect the approaching velocity and the orientation of the approach. The application of the proposed network is expected to realize the detection of three-dimensional motion.
