In recent years, with the rapid development of robots and artificial intelligence, the application of robots in high-tech fields such as aerospace, military, and medical technology has become increasingly widespread. The stringent requirements for space occupancy and quality in advanced technology fields have forced continuous research and development of micro robots.The black technology in the field of micro robots is also emerging endlessly. Today, let’s take a look at those micro robots that have once amazed the world. Are you familiar with them?
The Biomimetic Millisystems Lab at the University of California, Berkeley has developed a micro jumping robot named Salto, which weighs only 100g and is currently the most agile and best jumping legged robot, capable of jumping up to 1 meter every 0.58 seconds, with an agility of 1.7 m/s.This research was published in the inaugural issue of the renowned journal Science’s latest sub-journal, Science Robotics.
Researchers claim that effective jumping motion refers not only to the height of the jump but also to the frequency of jumps. Here, “agility” refers to the height that the micro robot can achieve during repeated jumps, more professionally known as the maximum average vertical speed that the jumping system can achieve during repeated jumping movements. So, if the Night Monkey can jump 1.7 meters every 0.78 seconds, its agility would be 2.2 meters per second.
At the International Conference on Robotics and Automation held in Seattle, researchers from MIT showcased a small origami robot that can move freely, automatically fold, walk, swim, and degrade. This robot can fold itself from a piece of paper with built-in magnets in seconds and immediately move vigorously on the ground or in water under the drive of a magnetic field. After using it, you can put it in acetone to let it decompose by itself. This robot has a complete life cycle like an animal. One day, it may perform these activities inside your body.
The unfolded robot consists of a magnet and a layer of polyvinyl chloride mixed with laser-cut structures, weighing only 0.31 grams and measuring 1.7 centimeters in length. Once placed on a heating element, the polyvinyl chloride will shrink and fold accordingly. In less than a minute, this robot is assembled and ready to go.It moves 3 to 4 centimeters per second.
In August this year, scientists from the Daegu Gyeongbuk Institute of Science and Technology in South Korea invented the world’s first ultra-micro ciliate robot, which can swim in human blood using magnetic force at an astonishing speed.
For micro robots, the “energy supply issue” is the primary concern, as they need to move to treat diseases. However, in blood, which is denser than water, the inertia of objects in motion is small, and the relative resistance is high. Therefore, the propulsion systems used by ships and submarines in the macroscopic world are very inefficient. Thus, researchers at the Daegu Gyeongbuk Institute turned their attention to the microscopic world—how microorganisms like paramecium or bacteria move?
Overall, this micro ciliate robot is 220 micrometers long, 60 micrometers high, with each cilium measuring 75 micrometers, and it can reach a maximum speed of 340 micrometers per second. Driven by magnetic force, this micro robot is 8 times faster than traditional micro robots and has high maneuverability.
Scientists from the Nanoengineering Department at the University of California have 3D printed a 120 micrometer micro robot called micro fish. This robot can control direction and speed through magnetic force and chemical reactions, capable of swimming in both biological and non-biological liquids. Scientists can make these micro fish swim in peroxide solutions for up to 2 hours, with a shelf life of up to a week at room temperature.
The technology used to create micro fish by scientists at the University of California is a nanoscale rapid 3D printing technique known as microscale continuous light printing. This technology primarily relies on a digital micromirror device chip and uses about two million tiny mirrors to project UV light onto photopolymer materials. Through 3D printing technologies similar to DLP and SLA, the 3D printing materials are cured layer by layer.This technology enables scientists to manufacture various shapes of micro fish (such as manta rays, sharks, etc.), with dimensions of only 120 micrometers (length) × 30 micrometers (thickness).
The inspiration for this robot comes from insects. Due to its small size, it can stand on a fingernail, hence it is called the “bug robot”. It may not look beautiful and seems unremarkable. However, it can quickly climb 1 foot in one second, making it incredibly fast, and it is known as a “climbing expert.” SRI International stated that they plan to scale up the technology to create a manufacturing hub containing thousands of bug robots to complete larger construction tasks.
It is reported that this project has received funding support from the military and is part of the DARPA Open Manufacturing Project.Perhaps with this technology, some heavy physical labor can be handled by robots.
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