TECHNICAL DATASHEET plyon® flex sensors Version 4.
1. Introduction Key Features • • • • • Resistive (Force), Capacitive (Touch) and Hybrid Readout Excellent Signal Integrity under Bending Highly Customizable Layers Small, Thin and Durable Simple Electrical Interface The plyon® platform is a capacitive-resistive, touch and force sensor based on a versatile layered architecture. It is a new approach to how physically and functionally unique sensor modules can be designed, produced, and integrated.
2. General Specifications Value Physical properties ® Product line: plyon flex Sensor generation: Tiger Size of tactile elementsa: Min 3 x 3 mm | 0.12 x 0.12 in Max 100 x 100 mm | 3.94 x 3.94 in Sensor thicknessb: ~0.5 mm | 0.0197 in Surface materials: Silicone Elastomer / PET Electrical termination: Exposed flex tail – 1 mm | 0.02 in pitch FFC Connector – 2.54 mm | 0.1 in pitch Material compatibility: Typical material compatibility of PET films and silicones needs to be considered.
3. Sensor Characteristics Resistive Device Characteristicsc d Minimal detectable force : d Measurement range : 0.5 N cm -2 [0.5, 20] N cm d Overforce tolerance : 1 kN cm Non-actuated resistance: Hybrid 0.1 N cm -2 -2 Notes -2 [0.1, 20] N cm -2 - >50 MΩ - [1, 5000] kΩ - Operating voltage range: ≤5 V ≤5 V Rise time: ≤5 μs - Single-point repeatability: ±12.2 % ±2.0 % Part-to-part repeatability: 9.1 % - >5 M Cycles >5 M Cycles Static loading: -5.8 % +4.3 % Hysteresis: 13.
4. Sensor Performance a. Signal Readout-Force The sensor signal is determined for stepwise increasing/decreasing force levels ranging from 0 N to 10 N with 0.5 N force steps according to the depicted actuation profile. The sensor response is measured through the EBS-10010 electronics and the readout values obtained are plotted against the force exhibited at each step. For this purpose, an average of the readout values recorded within each force step is determined. 4 Document Version: 4.
b. Signal Drift The resistive as well as the hybrid readout signals have been recorded for 10 hours of actuation with a constant load of 4 N. The results are shown in the following plot, where the 1 second mark is indicated by a vertical dashed line. The values of both readout signals are furhter depicted as histograms with identical bin sizes. Only samples recored 1 second after the actuation is initiated are included in the plot. 5 Document Version: 4.
5. Readout Circuits In the following two possible sensor readout circuits are suggested. Note that all measurements presented in this datasheet were recorded using the EBS-10010 electronics, which is based on the voltage divider configuration. a. Voltage divider A voltage divider configuration is the simplest readout circuit to determine sensor resistance. Given that Rref and Vin are known, the sensor resistance Rsens can be calculated by measuring the voltage drop Vout across the reference resistor Rref.
