How precision sensors are driving the robot revolution

The world of robotics is growing at an unprecedented pace, and it is predicted that more than half a million robots will be installed worldwide each year. This increase, driven by collaborative industrial poor to autonomous vehicles and surgical assistant highlights the ever-increasing demand for precise control and adaptability. At the heart of this development is the vital role of precise force and torque measurement, for which solutions from companies like Interface are proving indispensable. In our new case study, "Sensor Technologies Advance Function in Varied Robot Types," Interface details how Sensor technologies in the robotics revolution .

Why load cells are important: The foundation of robot intelligence

As robots perform increasingly complex and delicate tasks, real-time, multidimensional force measurement is highly beneficial and essential. Without it, the risk of costly failures—from significant financial losses in industry to serious safety risks in the medical or defense sectors—increases dramatically. This is where load cells, torque transducers, and multi-axis sensors come into play. They function as a sense of touch, quality control, joint control, and fail-safe robot monitoring.

Measurement sensor technologies provide critical data that enables robots to function correctly in diverse environments. Here are some examples of how they are used in robot development, testing, and performance monitoring:

• Measure torque and monitor load to ensure components are handled within safe limits and operations are consistent.
• Force feedback so robots can adjust their movements based on real-time interactions with their environment, similar to how a human hand senses resistance.
• Ensuring operational safety to avoid overloads, collisions and damage to the robot and its environment, especially in environments where humans and robots work together.
• Improve control algorithms by providing engineers with data to fine-tune robot movements to achieve unprecedented accuracy and efficiency.
• Confirmation of system reliability by validating performance during the design and testing phases, resulting in more robust and reliable robots.

The role of interface in supporting robot systems

Interface offers a comprehensive range of sensor solutions, including load cells, torque transducers, multi-axis sensors, wireless products, and metrology. These technologies are critical throughout a robot's lifecycle, from initial design through rigorous testing to ongoing performance monitoring. Their ability to deliver accuracy, quality, and flexibility is critical to breakthrough robotic applications.

Robot types and their need for sensors

Interface's precision sensors are used across the entire spectrum of robotics, with each type benefiting from improved force and torque measurement:

• Industrial robots, such as articulated, SCARA, delta, Cartesian, and collaborative robots, use load cells and torque transducers for precise control of joints and grippers in demanding applications such as the automotive and aerospace industries. During the design phase, these sensors optimize the structural integrity of the arm and ensure precise joint movements. They validate repeatability, accuracy, and resilience during testing in various scenarios. For performance monitoring, the sensors continuously track forces during production, enabling predictive maintenance and consistent, high-quality performance. Read more at Advances in robotics and cobots with interface sensors.
• Service robots span a wide spectrum, including medical, logistics, agricultural, construction, inspection, defense/security, space, and underwater robots. In medical robotics, high-precision miniature load cells are critical for developing precise instrument integration and force feedback mechanisms. In tests, they validate subgram precision and rapid response for sensitive surgical and diagnostic robots. Read our application notes at Surgical precision and medical innovation These sensors provide real-time force feedback for performance monitoring during live procedures, allowing surgeons to detect subtle resistances. Mobile service robots rely on load cells and multi-axis sensors during design to optimize chassis strength and sensor placement. During testing, performance is rigorously validated in varying terrain, monitoring ground contact forces, weight distribution, and collisions. For performance monitoring, they provide critical real-time data for trajectory planning, obstacle avoidance, and maintaining balance.
• Consumer robots include household, companion, social, and educational robots. During development, force and torque sensors ensure smooth, natural movements and safe human-robot interactions. Testing verifies their ability to interact safely with objects and people. For more information, see Consumer Products Embracing Robotic Automation. When monitoring performance, these sensors can detect wear and tear, maintain optimal operating efficiency, and ensure user safety. Interaction between EduRobots and Accurate Measurement highlights these types of robots.
• Humanoid robots are modeled after the human body. Their design requires comprehensive force and torque mapping to replicate human biomechanics and enable realistic gait, balance, and dexterous manipulation. Tests assess stability while walking, running, and handling complex objects. Sensors continuously provide data on balance, effort, and interaction forces, which are critical for maintaining complex movements. Learn more in The Force Behind the Future of Humanoid Robotics.
• Bio-inspired robots mimic animals, including robot dogs, for locomotion or specific functions. During development, sensors analyze and replicate animal locomotion patterns. Testing verifies their ability to navigate diverse terrain. Performance monitoring ensures that the robot maintains its bio-inspired locomotion integrity and adapts to changing environmental conditions.
• See how Sensors in applications for autonomous robot dogs .
• Mobile robots include autonomous vehicles, rolling, legged, flying, and underwater robots. Sensors are integrated during development to optimize suspension systems and ensure proper weight distribution. During the testing phase, these robots undergo rigorous testing, where load cells and multi-axis sensors provide critical data for validating trajectory planning and obstacle avoidance algorithms. For performance monitoring in the field, these sensors continuously provide data for critical navigation and real-time interaction with the environment. For more information, see the article. Testing and measurement in the age of autonomy.
• Fixed-base robots, such as robot arms used in production, lifting, machinery, and testing, operate from a static position. Force and torque sensors are essential during design for optimizing the structural integrity of the arm and developing precise joint motions. Testing includes rigorous validation of their repeatability, accuracy, and load capacity. During performance monitoring, sensors continuously track the forces applied during production, enabling predictive maintenance and preventing overloads.