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Giving Physical AI a Sense of Touch

While computer vision has become the dominant sensing technology for AI, touch is rapidly emerging as the next frontier. Whether it’s a rehabilitation device adapting to a patient’s movement, a smart wearable monitoring pressure distribution, or a robotic hand manipulating objects, tactile sensing provides information that cameras alone simply cannot capture.

Unlike force sensors that measure load at a single point, modern tactile sensing technologies generate high-resolution pressure maps across an entire surface, allowing products to detect contact location, force distribution, shear, slip and even texture. This creates a richer understanding of how a device interacts with both people and its environment.

Today’s tactile sensing landscape is evolving rapidly, with several complementary approaches emerging:

  • Capacitive electronic skin (e-skin):
    Flexible arrays of capacitive sensors provide high spatial resolution while conforming to complex geometries, making them well suited to wearables and robotic surfaces.
  • Piezoresistive tactile arrays:
    Cost-effective and highly scalable, these sensors change electrical resistance under pressure and are increasingly being integrated into large-area sensing applications.
  • Optical and vision-based tactile sensing:
    Use of cameras and deformable optical layers to reconstruct surface geometry and contact forces with precision.
  • Photodiode pillar architectures:
    Emerging optical sensing platforms use micro-scale elastomer pillars coupled with photodiodes to detect minute deformations through changes in light transmission. This approach offers high sensitivity, fast response times and excellent durability while remaining suitable for flexible, conformable surfaces.

Several companies are helping bring these technologies to market. GelSight continues to push the boundaries of vision-based tactile sensing, while XELA Robotics has developed multi-axis tactile sensors capable of measuring both normal and shear forces. Ensuring Technology’s HexSkin platform takes a modular approach to e-skins, combining distributed tactile sensing with integrated processing in flexible hexagonal tiles that can conform to complex surfaces and scale across large areas.


The Differentworks Perspective

Many tactile sensing technologies are inherently flexible, lightweight and conformable, making them highly compatible with soft goods such as garments, braces, sleeves, orthoses and wearable medical devices. As sensing materials become thinner, stretchable and more durable, they can increasingly be integrated directly into textiles or laminated within multi-layer soft-good constructions without compromising comfort or mobility.

This opens the door to products that do more than simply collect data. Compression garments could continuously monitor interface pressure and adjust compression through pneumatic or adaptive material systems. Orthopaedic supports could detect changes in fit or patient compliance throughout the day. Rehabilitation devices could personalise therapy by understanding how users interact with the product in real time rather than relying solely on motion tracking.

Similarly, in soft robotics and humanoid systems, these advances could mean safer physical interactions and greater precision tasks; high-resolution e-skins allow robots to detect gentle contact, recognise object slip, estimate applied force and respond compliantly when interacting with people.

At Differentworks, we see tactile sensing not as a standalone technology but as a layer in the Technology Stack. Its true value emerges when combined with advances in soft materials, embedded electronics, adaptive actuation and intelligent product design. Together, these technologies are redefining how physical products perceive, respond and ultimately interact with the people who use them.

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