When people hear the word "robot," many imagine human-shaped machines from science fiction. In reality, most robots look nothing like people. They are mechanical arms in factories, autonomous carts in warehouses, surgical systems in hospitals, vacuum cleaners in living rooms and rovers on Mars. Robots are already part of daily life, and their role is growing quickly as they become smarter, cheaper and safer.
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Where the word "robot" comes from
The word "robot" was introduced by Czech writer Karel Čapek in his 1920 play "R.U.R." (Rossum's Universal Robots). It comes from the Czech word "robota," associated with forced labor. In the play, artificial workers eventually rebel against humans, a theme that would appear in countless stories afterward.
In 1942, science fiction author Isaac Asimov published a story that introduced his famous "Three Laws of Robotics," a fictional set of rules meant to keep robots from harming people. Although they were created for fiction, the laws still inspire discussions about robot safety and ethics.
The first industrial robot
Unimate is considered the first industrial robot. Developed by inventor George Devol and entrepreneur Joseph Engelberger, it began working on a General Motors assembly line in 1961, handling hot metal parts from a die-casting machine, a dangerous job for people. Its success opened the door to the modern robotics industry.
Today, according to the International Federation of Robotics, more than 4 million industrial robots are operating in factories around the world, especially in the automotive and electronics industries.
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How a robot works
Most robots combine three basic elements:
- Sensors: cameras, lidar, touch sensors, microphones and other devices that collect information about the environment.
- Control system: software and processors that interpret the data and decide what to do.
- Actuators: motors, joints, wheels and grippers that move the robot and let it interact with objects.
Simple robots follow fixed programs. More advanced robots use artificial intelligence to recognize objects, plan movements and adapt to changes around them.
Main types of robots
Industrial robots
Robotic arms weld car bodies, paint parts, assemble electronics and package products with speed and precision. They usually work inside protected areas to keep people safe.
Collaborative robots (cobots)
Cobots are designed to work alongside people. They move more slowly, detect contact and stop when necessary. Small and medium businesses often use them for tasks such as picking parts or tightening screws.
Medical robots
Surgical robotic systems allow surgeons to perform minimally invasive operations with small incisions and precise instruments. The surgeon remains in control, using the robot as an extension of their hands. Robots are also used in rehabilitation, pharmacy automation and hospital logistics.
Logistics robots
In large warehouses, autonomous robots move shelves and boxes, bringing products to workers and reducing walking time. Robots also sort packages in distribution centers.
Service and home robots
Robot vacuum cleaners, lawn mowers and pool cleaners are among the most common robots in homes. Delivery robots are being tested on sidewalks and in buildings.
Agricultural robots
Robots help with milking cows, monitoring crops, removing weeds and harvesting some fruits and vegetables. They can reduce the need for chemicals and help farms deal with labor shortages.
Exploration robots
Robots go where humans cannot easily go: deep oceans, disaster areas, nuclear plants and other planets. NASA's Perseverance rover, which landed on Mars in 2021, studies rocks and searches for signs of ancient life.
Humanoid robots
Companies and research labs are developing robots with human-like shapes, designed to work in environments built for people. They are still mostly in testing, but they attract great interest.
Benefits of robots
- Safety: robots take on dangerous, dirty and exhausting tasks.
- Precision: they repeat movements with high accuracy.
- Productivity: they can work long hours with consistent quality.
- Health care: they support surgery, rehabilitation and assistance for people with disabilities.
- Exploration: they expand scientific knowledge in places humans can't reach.
Challenges and ethical questions
Jobs
Automation can reduce demand for some jobs, especially repetitive ones. At the same time, it creates roles in programming, maintenance, supervision and design. Training and education are essential to help workers adapt.
Safety
Robots must be designed, tested and certified to avoid accidents, especially when they work near people.
Privacy
Home robots with cameras and microphones collect data. Users should understand what is stored, where and for how long.
Responsibility
When an autonomous system makes a mistake, it must be clear who is responsible: the manufacturer, the programmer, the operator or the owner.
Autonomous weapons
The use of robots and AI in military systems raises serious international debates about human control over life-and-death decisions.
Robots in Brazil and around the world
Asia is the largest market for industrial robots, led by China, followed by Japan and South Korea, while Germany and the United States are major users in Europe and North America. South Korea has long had one of the highest numbers of robots per factory worker in the world. In Brazil, robots are concentrated in the automotive industry, but they are spreading to food processing, logistics, agriculture and hospitals. Universities and technical schools across the country train engineers and technicians in automation and mechatronics, an area with growing demand.
How to choose a home robot
- Check the size of your home and the types of floors before buying a robot vacuum.
- Compare navigation systems: models with mapping are more efficient.
- Look at maintenance costs: filters, brushes and batteries need replacement.
- Review privacy settings: understand which data the robot collects and sends to the cloud.
Robots and artificial intelligence
Artificial intelligence is giving robots new abilities, such as understanding spoken instructions, recognizing objects they have never seen and learning tasks from demonstrations. This combination is one of the most active areas of research in technology today.
Learning robotics
Robotics is a great way to learn programming, electronics, mechanics and problem-solving. Many schools offer robotics clubs, and international competitions bring together students of all ages. Simple kits allow beginners to build and program their first robot at home.
Related reading:
- Hyperautomation: What It Is, How It Works and How Businesses Use It
- ChatGPT and AI Assistants: How They Work and How to Use Them Well
Frequently asked questions
Who invented the word "robot"?
Czech writer Karel Čapek, in his 1920 play "R.U.R."
What was the first industrial robot?
Unimate, which began working at a General Motors factory in 1961.
How many industrial robots are there in the world?
According to the International Federation of Robotics, more than 4 million are operating in factories.
What is a cobot?
A collaborative robot designed to work safely alongside people.
Will robots take all jobs?
Robots automate certain tasks but also create new jobs. Education and training help people adapt.
Are humanoid robots already in use?
Most are still being tested, although some companies are running pilot projects in warehouses and factories.
Conclusion
Robots have moved from science fiction to everyday reality. They make work safer, support medicine and expand exploration, but they also raise important questions about jobs, privacy and responsibility. Understanding how robots work and how they are used helps us shape a future in which technology serves people.