Jean-Nicolas Tisserant | Flexoo: How do you wire a sensor array that's 30 meters long using a roll-to-roll printer with a 50cm circumference?
00:10:32 - 00:12:03
Other snippets from this talk
Summary of the clip:
How do you wire a sensor array that's 30 meters long using a roll-to-roll printer with a 50cm circumference?
This segment introduces a powerful, patented layout for creating arbitrarily long sensor strips using standard roll-to-roll printing. This design solves the critical challenge of wiring and connecting sensors over areas much larger than the printing cylinder's circumference, a major bottleneck for large-area flexible electronics. The resulting product can be cut to any length, from a few centimeters up to many meters, to fit a specific application.
The core technical trick is a unique wiring pattern that connects consecutive pins on opposite sides of the printed web, but with a strategic offset. This allows the connection path to "walk" down the roll, seamlessly connecting the last pin of one print revolution to the first pin of the next. This creates a continuous, daisy-chained bus that can extend over dozens or even hundreds of print circumferences.
The manufacturing and application impact of this innovation is a game-changer for large-area sensing. The design is fully compatible with high-throughput roll-to-roll processing and eliminates the nightmare of tiling and stitching hundreds of small sensor pads. This enables vast surfaces, like entire rooms, truck trailers, or wind turbine blades, to be instrumented with a single, easily-connected sensor strip, with demonstrated examples up to 30 meters long.
In this short video, you can learn:
* The patented "endless connector" design principle for large-area printed electronics.
* How to overcome printing cylinder size limitations to create arbitrarily long sensor strips.
* The practical impact of this technology: enabling cut-to-length sensors for applications up to 30 meters long.
š **Clip Abstract** This clip unveils a breakthrough roll-to-roll printing technique for creating arbitrarily long sensor strips, solving the notorious "tiling and stitching" problem. By using a clever shifted connection layout, Flexoo can produce sensors up to 30 meters long that can be cut to size and require only a single connection point.
š Link in comments š
#RollToRollPrinting, #EndlessConnector, #LargeAreaSensors, #FlexibleSensorStrips, #PrintedElectronics, #SmartSurfaces
This is a highlight of the presentation:
More Highlights from the same talk.
00:05:30 - 00:06:58
How can you eliminate drift and hysteresis in printed pressure sensors without changing the ink chemistry?
How can you eliminate drift and hysteresis in printed pressure sensors without changing the ink chemistry?
This clip reveals a patented sensor architecture that solves the fundamental problems of drift and hysteresis in piezoresistive sensors. The innovation lies not in new materials, but in a clever geometric design. Instead of forcing current to flow out-of-plane through the deformable microstructures, the new design makes the current flow primarily in-plane, with its resistance being modulated by the out-of-plane pressure. This avoids the permanent viscoelastic deformation that plagues traditional sensor designs.
The speaker presents compelling graphical data directly comparing the new "pri-mode" sensor to a standard through-mode sensor. The standard sensor exhibits significant hysteresis, where the resistance curve on release does not follow the curve on compression, making calibration impossible. Furthermore, it shows a dramatic, pressure-dependent drift, changing by as much as 40% over 10,000 seconds under a constant load.
In stark contrast, the new sensor's performance is shown to be revolutionary. The hysteresis is virtually eliminated, resulting in a clean, repeatable, and predictable response curve. The signal drift is massively reduced to negligible levels. Critically, this leap in performance is achieved using the exact same commercially available inks from Henkel; the only change is the printed geometry, making it a highly manufacturable and scalable solution.
In this short video, you can learn:
* The novel "in-plane" current flow architecture for piezoresistive sensors.
* Visual data demonstrating the drastic reduction of sensor drift and hysteresis.
* How to achieve significant performance gains through geometric design rather than materials science.
š **Clip Abstract** Flexoo reveals a patented sensor design that nearly eliminates drift and hysteresis, key challenges for printed piezoresistive sensors. This is achieved not by complex chemistry but by a clever geometric change that alters the current path, enabling quantitative measurements with standard inks.
š Link in comments š
#PiezoresistiveSensors, #InPlaneCurrentFlow, #SensorGeometricDesign, #HysteresisElimination, #PrintedElectronics, #FlexibleElectronics
00:07:12 - 00:08:11
Can one printed sensor really cover applications from a gentle touch to the pressure under a truck tire?
Can one printed sensor really cover applications from a gentle touch to the pressure under a truck tire?
This clip provides a quantitative summary of the new sensor's key performance metrics, which form the technical foundation for Flexoo's mass customization strategy. The speaker highlights the sensor's excellent repeatability and extremely low drift of less than 2% over time, a figure that is at least an order of magnitude better than existing force-sensing resistors (FSRs). The sensor also exhibits practically zero hysteresis, independent of the pressure range.
A critical specification for enabling a "one sensor fits all" approach is the massive dynamic range. The sensor is capable of quantitatively measuring pressure from 1 kilopascal all the way to 20,000 kilopascals (20 MPa). This enormous range means the same fundamental sensor element can be used in a huge variety of applications, from light-touch human-machine interfaces to high-pressure industrial monitoring, without changing the core materials or design.
Finally, the speaker touches on other parameters vital for real-world deployment. The temperature coefficient of resistance is low, at less than 1% per degree Celsius, minimizing environmental interference. Furthermore, the precision of the roll-to-roll manufacturing process ensures high consistency, with a pixel-to-pixel variation of less than 5%, which is crucial for building reliable, large-scale sensor arrays.
In this short video, you can learn:
* The specific performance metrics of Flexoo's advanced piezoresistive sensor.
* How a massive dynamic range (1 to 20,000 kPa) enables a "one sensor fits all" strategy.
* The importance of low drift, zero hysteresis, and low pixel-to-pixel variation for mass customization.
š **Clip Abstract** Discover the impressive, quantified performance of Flexoo's new printed sensor, which boasts less than 2% drift and a massive dynamic range from 1 to 20,000 kPa. These best-in-class specifications are the key enabler for their mass customization strategy, allowing one sensor design to serve a multitude of diverse applications.
š Link in comments š
#PiezoresistiveSensor, #DynamicRange, #LowDrift, #RollToRollManufacturing, #PrintedElectronics, #HumanMachineInterface