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CloseTACTILE SENSORS: THE TOUCH THAT WILL TRANSFORM ROBOTICS
Humanoid robots have long captured our imagination, evolving from science fiction icons to real-world prototypes, with the promise of reshaping industries and elevating daily life. Their potential to reshape industries and enhance daily life depends on a breakthrough that robotics has not yet achieved: the ability to manipulate the physical world with human-level precision. True dexterity requires sensing that captures the subtleties of real-world physics including softness, texture, fragility, and positional feedback.
At the core of this challenge are tactile sensors, a capability that can transform robotic hands from rigid tools into adaptive, versatile, intelligent appendages capable of performing a multitude of tasks in real-world environments. High-fidelity tactile sensing is also essential for AI training, which will guide dexterity and autonomy in next-generation robotics.
Robots need to feel the world, not just see it.
VISION AND TOUCH
Robotic manipulation has historically relied on vision systems driven by vision technology. However, vision processing is computationally intensive and requires significant computer power to process visual data. It’s effective for many tasks, but these systems may fall short when robots need to interact with objects that are small, deformable, or hidden from view.
To overcome these limitations, Analog Devices, Inc. (ADI) is pioneering a multimodal tactile sensing prototype that brings complementary physical insights into the manipulation loop.
MULTIMODAL TACTILE SENSING
Traditional robotic hands rely on force and torque sensors, but human touch is far richer when interacting with objects. Replicating this complexity in robotics requires multimodal tactile sensing—a fusion of multiple sensory modalities integrated into the fingertips and palm.
These modalities could potentially include and are not limited to:
Pressure and Force Sensors
Detect grip strength, object resistance to handling, and shear distribution.
Temperature Sensors
Identify thermal properties, crucial for handling sensitive materials.
Microphones
Capture acoustic signals and vibrations, enabling detection of surface textures or audible events like connector clicks.
Accelerometers
Measure acceleration vectors in three dimensions to sense slip, material properties, and unexpected fingertip motions.
This multimodal data needs to be read at high frequency to allow for fast reaction times. That results in high data volume streams that require AI algorithms to fuse together and interpret context. Any tactile sensor can detect changes in force, but AI makes sense of those changes. For example, instead of merely reporting a change in force, AI can infer that a glass is slipping and adjust its grip instantly.
Industrial-scale sensor fabrication is essential to developing a precision robotic hand. ADI is developing scalable tactile sensor prototypes, achieving resolutions up to five times that of a human fingertip. The different modalities are an excellent example of sensor fusion, dedicated to providing the highest performing tactile sensor suite for the humanoid hand.
INTEGRATING MULTIPLE MODALITIES: A DESIGN CHALLENGE
Packing an array of sensors into a fingertip-sized module is an engineering feat. Each modality adds complexity. These factors must be taken into account.
Size
Sensors, signal conditioning circuits, and connectivity must fit within a fingertip. Miniaturization is key.
Bandwidth
High-resolution, multimodal sensors generate massive data volumes. Ample bandwidth ensures this rich tactile information flows reliably from the fingertip to the compute in the hand without bottlenecks or data loss.
Latency
Robots must process sensor data and drive actuation as fast as human reflexes to avoid crushing or dropping fragile objects. Low latency is critical for translating sensitive touch into real-time, physical responses.
Repeatability
Maintaining high data quality requires minimizing signal drift over time and across different hardware. Consistent sensor performance ensures robust operations and reliable data collection across robotic fleets.
Durability
The sensors must withstand a predictable number of usage cycles with sufficient reliability to avoid frequent, unexpected replacements.
IMPACT ACROSS INDUSTRIES
Automotive Manufacturing
Robots can weld car frames, but connecting, routing, and installing intricate wiring during vehicle assembly remains a human task. Tactile-sensitive hands could automate this process, reduce labor shortages, and improve efficiency.
Data Centers
These require tens of thousands of repetitive wire connections. Maintaining those connections requires a robotic arm and hand to navigate the jungle of wires. Tactile sensors can help guide the hand to wiggle through complex wire routings and reach, position, and insert/remove the wires as needed.
Hazardous Environments
From nuclear plants to chemical facilities, tactile-sensitive robots can perform hazardous tasks, reducing human risk.
Healthcare
Tactile-sensing robots can transport medication around healthcare facilities, freeing nurses to focus on patient care. These robots will eventually be able to perform surgical tasks, leveraging tactile feedback for unprecedented precision and providing clinical staff more bandwidth.
Consumer Applications
Assistive robots can assist with feeding, dressing, and other daily tasks that require sensitivity and care, especially for older adults.
EXPERTISE ADDRESSING CUSTOMER NEEDS
Bridging the physical and digital worlds is at the center of ADI’s core strength. Deep signal-chain expertise helps guarantee clean, reliable analog-to-digital conversion, essential for interpreting multimodal sensor data. Miniaturization is also a strength, with fingertip-sized modules that combine multiple sensing modalities without compromising performance.
Building on this hardware foundation, the sensors feature an AI-native architecture. Domain expertise is embedded directly into the system through pretrained models instilled with a deep understanding of physical interactions and complex sensing modalities. By developing full-stack, end-to-end demonstrations of critical tasks, such as real-time slip prevention, a clear, viable path is provided for customers to seamlessly integrate the sensor system and deploy their own dexterous, intelligent robots.
CHALLENGES AND OPPORTUNITIES
Today’s industries face broader questions beyond the technical hurdles. Currently, no universal standards exist for humanoid hands, which, while fostering innovation, complicate interoperability. Locomotion is largely solved, but manipulation—coordinating hands for diverse tasks—may take years. Until robots can perform multiple tasks autonomously, adoption will remain gradual.
Despite these challenges, momentum is building. Industry leaders are racing to deploy humanoid robots, and the hand is emerging as one of the most strategic components. A capable hand, equipped with physical intelligence, will differentiate the next generation of machines.
A FUTURE SHAPED BY TOUCH
The tactile sensor is more than a technical milestone. It’s a gateway to a future where robots enhance human life with care, safety, and precision. Physical intelligence will allow robots to interpret physical context, adapt in real time, and operate as trusted collaborators in homes, hospitals, factories, and hazardous environments.
This is the foundation of dexterous robotics that can see, speak, touch, and engage with the world in ways that elevate human capability. This work represents early stage research and development, with progress shaped in close collaboration with a small group of lead customers as we continue to refine and validate the technology.
To follow the journey and stay informed on the latest advances in ADI’s innovation, visit our Physical Intelligence page.
Want to dive deeper into the new era of industrial robotics? Check out the blog series on EngineerZone.
