Collaborative robots, often abbreviated as "cobots," are robots designed to safely interact and work alongside humans in shared workspaces. Unlike traditional industrial robots that operate autonomously behind cages, cobots are built with advanced sensors, artificial intelligence, and control algorithms that allow them to operate in close proximity to humans. The concept of collaborative robots originated in the late 1990s from research labs exploring how robots could work cooperatively with humans on manufacturing assembly lines or other tasks.
How do collaborative robots work?
Cobots are designed with intuitive robotics capabilities that do not require specialized skills to program or control. Most collaborative robots can simply be guided through desired motions and tasks, with the movements recorded and stored to repeat autonomously. More advanced collaborative robots use machine vision systems to observe and adapt to changing conditions in real-time without the need for human intervention. This allows cobots to react and adjust movements to accommodate working alongside humans. Most cobots will either slow down or completely stop motion when detecting an obstruction or human nearby.
Safety capabilities
Advanced sensing technologies and control methods are essential for allowing robots and humans to work collaboratively in shared spaces. Today's cobots utilize a combination of proximity sensors, vision systems, force sensing, and artificial intelligence to continuously monitor their surroundings and precisely control motions. Common safety capabilities found in collaborative robots include:
Force sensing: Cobots can detect forces in multiple axes and respond by stopping motion to prevent injuries from collisions.
Speed and separation monitoring: Onboard sensors track speed, proximity of humans, and separation distance to avoid contact through automatic speed reductions or stops.
Lightweight designs: Cobots typically have payload capacities under 35 kg and employ rounded coverings and padded materials to limit harm in the case of any inadvertent contact.
Emergency stops: Manual e-stop buttons or automatic safety activations can immediately halt cobot motions when triggered by sensors.
Validated safety methods: Reputable cobot manufacturers submit their robots for testing and certification by standardized bodies to validate their adherence to global safety standards.
By leveraging these safety capabilities, cobots can eliminate the need for physical barriers between robots and workers that previously limited collaborative applications in industrial settings.
Industries using collaborative robots
The flexible nature and safer interactions of collaborative robots have seen their adoption rapidly spread across diverse industries:
Manufacturing: Cobots excel at repetitive pick-and-place assembly, packaging, quality inspection, machine tending and other manufacturing tasks alongside production workers. Their simple deployment allows smaller manufacturers to automate without dedicated robotics expertise.
Warehousing and logistics: Tedious picking, sorting, packing and organizing tasks are well-suited to easy-to-program cobots that can scale across warehouses.
Healthcare: Reception, specimen handling and pharmacy dispensing are some healthcare applications where cobots can interact safely with patients and staff to increase efficiency.
Retail: Handling stocking, inventory auditing, grabbing online orders or bagging items are retail uses gaining traction as the technology becomes more accessible.
Research: Customizable cobot platforms enable research teams to prototype automation of experiments, device interactions and a wide array of repetitive lab work.
Food and beverage: The need for flexible, hygienic automation makes collaborative robots ideal options for assisting food preparation, tended machines, packing finished food products and quality control processes.
Benefits of collaborative robots
There are several compelling benefits driving businesses to adopt collaborative robots:
Increased productivity: Cobots reliably automate repetitive, dull or labor-intensive tasks allowing human workers more time for higher value responsibilities. Fewer errors and higher repeatability also boost productivity.
Easy integration: With quick set-up times and no need for specialist programmers, cobots can be flexibly moved between processes or workstations to accommodate changing business needs.
Improved safety: Collaborative applications nearly eliminate risks associated with traditional industrial automation by allowing robots and humans to work together without safety barriers hampering collaboration.
Better working conditions: Removing dull, repetitive tasks from human workers allows them to focus their skills on more satisfying aspects of jobs leading to reduced workplace injuries and improved morale.
Lower costs: Cobot solutions are more affordable to implement for most businesses than previous automation options thanks to compact footprints, lower component costs and minimal integration complexity.
Augmented capabilities: Rather than replacing workers, cobots enhance their capabilities allowing them to accomplish tasks impossible alone - for example combining a person's adaptability and problem solving with a cobot's ability to handle heavy loads or apply high precision for extended periods.
Challenges with implementing collaborative robots
While offering tremendous advantages, there remain some challenges surrounding cobot adoption:
Perceived risks: There is lingering uncertainty from workers and management about whether cobots can be fully trusted to operate safely as coworkers without harming humans unintentionally through possible mechanical failures or control errors.
Inadequate sensing capabilities: Even advanced sensing suites on today's cobots may still react inadequately to fast moving or complex sequences of movements requiring closer supervision.
Repetitive strain concerns: Without proper implementation, having human workers perform simpler tasks like loading or unloading parts for a cobot over long shifts could introduce other physical strains that provide minimal workplace improvements.
Customized applications: Although easier than traditional automation, some highly customized tasks or workflows are still complex undertakings to program collaborative robots to perform at acceptable speed, quality and safety levels.
Justifying returns: Questions still surround calculating longer term returns on investment since quantifying some cobot benefits like improved employee satisfaction requires tracking indirect impacts that are more subjective than easily measured direct production efficiencies.
Overcoming these challenges is an ongoing journey as robotics manufacturers, system integrators and end-user companies closely collaborate. Extensive operator training, embracing gradual deployment approaches and constantly improving sensing are examples of current strategies allowing businesses to take full advantage of the promise of human-robot collaboration.
The future of collaborative robotics
The outlook for collaborative robots remains highly promising with projections for cobot sales to grow at over 20% per year to 2030 reaching global annual shipments between 600,000 to 900,000 units and a worldwide operational stock exceeding 12 million cobots. Driving this growth is the widening range of lightweight, user-friendly cobots from pioneering companies like Universal Robots and Techman Robot that are affordable for most small manufacturers. Envisioned advances like standardized programming methods between different cobot makers and truly intelligent situational awareness to handle human unpredictability will further progress safe human-robot interactions. Ultimately, collaborative automation will become indispensable across far more industries as cobots mature from novel technologies into flexible mainstream production partners integrated into the fabric of nearly all manufacturing and service operations needing optimized human-robot collaboration.
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