The limitations of classic gas sensors can be overcome using the strategies inspired by the solutions known from biological systems. They are believed to substitute or to complement animals in the analysis of gas substances, including explosive and hazardous ones. The electronic analogues are a subject of investigation in many research centres, which brings their successful commercialization closer. Unusual capabilities of biological chemosensory systems, including both vertebrates and invertebrates, stimulate elaboration of the devices mimicking their activity and operation parameters as precisely as possible. These results indicated the feasibility of an insect-behavior-based olfactory sensor for robotic odor searching.ĭue to unique abilities of the animals regarding analysis of complex gas substances, they still remain a gold standard in analysis of explosives. Finally, we implemented the sensing device in an odor-searching robot and demonstrated that the classifier performance was sufficient for a robot to localize an odor source by utilizing artificial searching algorithms. Then, we predicted the presence of an odor using a support vector machine. First, we collected behavioral data with and without odor stimuli. In this work, we developed an odor-searching mobile robot with an odor sensing device based on a silkmoth’s walking pattern. Therefore, it is possible to utilize a silkmoth’s behavioral response as an olfactory sensor for robotic odor searching. In recent years, machine learning has been used to classify the behaviors of silkmoths to estimate the timing of odor reception. Therefore, techniques that can easily detect the odor response of silkmoths with high sensitivity have become important for odor detection and searching. Furthermore, the odor preferences of silkmoths can be modified using genetic tools. The male silkmoth (Bombyx mori) is a candidate biosensor because of its high sensitivity to the conspecific sex pheromone with stereotypic searching behavior. Extremely sensitive odor sensors are required for odor searching in mobile robots.
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