First Look at Paraborgs, Cyborg Roaches That Crawl Into Rubble and Fire Lifesaving Needles

Photo credit: The University of Queensland
Australian researchers have fitted giant burrowing cockroaches with electrodes, cameras, and spring-loaded syringes so the insects can be steered like tiny remote vehicles and deliver medicine in places no human or ordinary robot can reach.

Giant burrowing cockroaches from northern Queensland are a big deal, measuring 87 millimeters long and weighing 40 grams, making them the biggest roach species ever recorded. Not only are they gigantic, but their size allows them to carry very substantial loads, approximately 17 grams worth, in a backpack that adds only 15 millimeters of height to the already amazing insects. Despite this increased weight, their walking, climbing, and fall recovery abilities remain nearly unchanged. It’s no wonder that researchers from the University of Queensland’s Biorobotics Lab and the University of New South Wales have named them Paraborgs.

When a Paraborg is anesthetized, electrodes are put into its antennae and little tail-like cerci. When the insect wakes up, it goes about its business as usual, munching dry gum leaves and apples, but the true magic occurs when a portable controller sends radio signals to the roach. It only takes one antenna to flip the roach left or right. In contrast, stimulating the cerci causes the roach’s speed to vary. The transmissions’ frequencies are purposely kept between 10 and 50 hertz, as anything higher loses effect. The good news is that the roach can still control the majority of its own movement because the signals only tweak its direction and speed.

Some Paraborgs are outfitted with a small Wi-Fi camera that feeds video at 24 frames per second, giving us a good view of what’s going on. Others carry a small injector with a spring that releases a 0.5-milliliter syringe when a tiny hot wire cuts a fishing line. The plunger is powered by a combination of citric acid and potassium bicarbonate, which emits carbon dioxide and provides just enough force to pierce silicone or pig skin. do this: the injector pack is reusable, giving teams three to four chances to do it correct. It’s worth mentioning that they maintain the two jobs separate, so no single insect gets overworked. One scout with a camera locates the target, while a second bug follows and discharges the needle.

Lab courses were designed with 2.5 meters of track, three checkpoints, and an 8-by-10-centimeter silicone pad at the finish. In 25 trials, the roaches passed every single checkpoint. Injections have a success rate of 72%, which is not bad. When the launch happens inside 150 millimeters, the hit rate increases to 95%. The average pace was a snail’s 8.4 millimeters per second, and the entire run took approximately 5 minutes. Earlier cyborg-insect experiments were content with scouting, but the Paraborgs take it a step further by including genuine medical activity.

According to T. Thang Vo-Doan of the Queensland lab, developing a robot small enough to achieve all of this remains a difficult issue, but real insects hold all of the answers. Then there’s Hai Nhan Le, a co-author, who points out that a big cockroach approaching a trapped human would appear frightening. In a fallen structure, where every second counts, a single insect could spell the difference between life and death. So, what do we do? The researchers propose flashing some lights or perhaps a tiny little speaker that says “help is on the way” to notify those in need that relief is on its way and to calm them down a little.
[Source]