New sensor: it can be used for anti-collision of UAV and other equipment
a new 60 ~ 100W light sensor may contribute to the future anti-collision technology development of UAV, robot and autonomous vehicle, which is inspired by swarms of locusts
locusts fly in groups at the speed of miles per hour, but they can avoid collision in a few hundred milliseconds
American researchers have developed an electronic version of a special neuron unique to locusts, which allows locusts to respond quickly without consuming too much energy
at present, the collision sensors of autonomous vehicle are often large and heavy. The difference is that this kind of detector inspired by insects is very small and can respond in two seconds
saptarshi DAS, the author of the paper and an engineer at Pennsylvania State University, said, "we have been looking for animals with unusual abilities, those that do better than humans."
"insect vision is often used to design automatic systems, because they can fly without collision, but later we found that locusts are unique."
unlike other insects, locusts use a single, specialized neuron to avoid collisions - experts call it the lobula giant movement detector, or LGMD for short
"so we began to study how it works. Locusts are incredible. What these creatures can do is very shameful," Dr. Das added
researchers found that LGMD neurons respond to two signals - one is from the eye, which will be triggered when seeing a approaching locust, in order to further understand the possibility of industrialization of the research and development results and increase with the approach of other insects - the other is the relative angular velocity of the locust
"because neurons have two branches, the locust calculates the changes of these two inputs and realizes that something will collide, so the locust that avoids changes its direction," said darsith jayachandran, an engineer at Penn State University
based on the special collision avoidance mechanism of locusts, researchers have developed a nano-sized collision sensor using a photodetector made of single-layer molybdenum sulfide
they put this device on a tiny programmable memory circuit, which can simulate the neuronal response of locusts when they fly with only a small amount of energy
the team said that this research and development "is a big step towards the development of intelligent, low-cost, mission specific, energy-saving and miniaturized anti-collision systems."
we Jinan Shijin specialized in the production of experimental machines for so many years, Dr. Das said: "locusts can only avoid collisions with other locusts, and our equipment can detect potential collisions of various objects at different speeds."
with the completion of the preliminary study, researchers now need to optimize their equipment to deal with situations other than direct collision - this is the adjustment made by the current setting
"we can't measure every situation. So we developed a numerical model," added Aaron Oberoi, a paper author and engineer also from the University of Pennsylvania
"we can also test whether multiple devices will work better on the same chip. So far, it seems that a single device is enough. However, the multi-pixel collision detector array can provide collision avoidance in 3D space," he added
the full results of this study were published in the journal Nature electronics