Miniature Tactile Sensors: Fitting Complex Sensing Capabilities into Compact Hardware
Next-Gen Miniature Tactile Sensors: Shrinking Hardware Without Losing Performance
At Touchlab, our mission has always been centered on giving robots a human-like sense of touch. Pushing the boundaries of tactile sensing means engineering miniature tactile sensors that fit into tiny form factors while delivering ultra-precise data. As part of our ongoing project with ARIA (Advanced Research and Inventions Agency), we have taken on a thrilling challenge: taking our existing industry-leading fingertip sensor and significantly shrinking its form factor while simultaneously boosting performance. Being at the forefront of this shift is immensely exciting for engineers like us; we are not just tweaking existing tech, we are actively breaking barriers and treading new ground so we can give our users unprecedented capabilities in robotic dexterity and perception.
To achieve a really high sample rate within a vastly reduced package, we are pushing the absolute limits of manufacturing and physics. This effort relies on a novel sensing and readout architecture designed to deliver ultra-precise data without sacrificing reliability.
Prototyping High-Density Electronics in Tiny Enclosures
When attempting to package complex physical and electrical architecture into a fraction of its original volume, speed and precision are paramount. With a lean engineering team, our success hinges on establishing solid, streamlined processes.
Our core objective is straightforward yet demanding: move from drawing board concepts to a fully functional prototype in the fewest possible revisions, in the shortest possible timeline, and with the highest achievable specs.
To maintain this momentum, we place heavy emphasis on rigorous early-stage modeling and thorough design validation. This initially felt like a step backwards, as we stepped away from our functioning product and back to breadboard development, rewriting much of our codebase from scratch due to such a radical toolchain change, our prior experience and product development maturity allowed us to build robust processes and glide smoothly through that early development.
Overcoming Manufacturing Limits in Fine-Tolerance PCB Design
Pushing physical boundaries requires close alignment between custom sensor design and modern fabrication capabilities. We work closely with key industry partners, including Elite Electronic Systems, Würth Elektronik, Arrow Electronics, and Printed Electronics, to bridge the gap between theoretical limits and real-world manufacturability.
By engaging with these specialised partners early in the engineering lifecycle, we ensure that every design choice remains realistic. Whether evaluating substrate tolerances, trace densities, or component availability, these collaborative feedback loops prevent costly redesigns and keep our hardware roadmap on track.
We have put effort into building personable relationships with our partners, which has helped us establish a consistently trustworthy and active communication link. To achieve the best results, we believe in being approachable and collaborative partners; and for fine-tolerance PCB design and manufacturing, opening those communication channels early can be the critical difference between getting the design right the first time and delivering on time.
3D PCB Co-Design for Ultra-Tight Spatial Constraints
Hardware miniaturisation is inherently multi-disciplinary. Inside Touchlab, tight communication between our mechanical, electrical, and firmware engineers is essential. Every design change in our layout directly impacts mechanical fit, thermal dissipation, and signal integrity.
Using Altium Designer, and its mechanical co-design features, we model and refine our PCB layouts to guarantee that components assemble seamlessly into the mechanical housing and that our tactile sensors capture signals with sub-millimeter accuracy.
Real-World Impact: Compact Tactile Sensing in Care and Remote Work
Designing high-performance tactile sensors in tight spaces is a complex puzzle, but by combining clear engineering processes, strong partner relationships, and robust internal collaboration, we are turning ambitious physical goals into tangible prototypes.
Whenever the design challenges feel overwhelming, what keeps me going is seeing exciting use-cases that truly make ordinary people's lives easier. I encourage readers and builders to take our technology and use it to do cool stuff, whether supporting overstretched sectors like care and medicine, or de-risking hazardous jobs by making them remote. We are all truly energised to smash performance records by the opportunity to deliver transformative tools to our customers and partners.
The journey of redefining tactile sensing is just getting started, and we can’t wait to share further updates as our next round of testing progresses!
