Fig. 6: The application of the artificial olfactory memory system.

a Logic circuit of the memory alarm system for alcohols and aldehydes, photograph of the light-emitting diode. b Response and brightness curves of the memory alarm system. Brightness is limited to the schematic, where light green indicates low brightness, corresponding to a lower response dark green indicates high brightness, corresponding to a higher response, and white indicates off, corresponding to no response. c Schematic diagram of sensory memory of the unmanned aircraft. d Photograph of the memory detection module and the unmanned aircraft. e Photograph of the sensory memory of the unmanned aircraft. f Applications of the artificial olfactory memory system, left: flexible patches, middle: portable detection box, right: telecar.