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Sensors 2014, 14(5), 8082-8095; doi:10.3390/s140508082
Article

Thermoresistive Strain Sensor and Positioning Method for Roll-to-Roll Processes

1
 and 1,2,*
Received: 24 January 2014; in revised form: 24 April 2014 / Accepted: 28 April 2014 / Published: 5 May 2014
(This article belongs to the Section Physical Sensors)
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Abstract: This study uses the Joule heating effect-generated temperature difference to monitor in real-time and localize both compressive and tensile strains for the polymer substrates used in the roll-to-roll process. A serpentine gold (Au) line was patterned on a polyethylenenaphthalate (PEN) substrate to form the strain sensor based on thermoresistive behavior. This strain sensor was then subjected to either current or voltage to induce the Joule heating effect on the Au resistor. An infrared (IR) detector was used to monitor the strain-induced temperature difference on the Au and PEN surfaces and the minimal detectable bending radius was 0.9 mm with a gauge factor (GF) of 1.46. The proposed design eliminates the judgment ambiguity from conventional resistive strain sensors where resistance is the only physical quantity monitored. This study precisely and successfully indicated the local strain quantitatively and qualitatively with complete simulations and measurements.
Keywords: alignment; gauge factor; infrared; Joule heating; polyethylenenaphthalate; registration; roll-to-roll; sensor; strain; thermoresistive alignment; gauge factor; infrared; Joule heating; polyethylenenaphthalate; registration; roll-to-roll; sensor; strain; thermoresistive
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Liao, K.-H.; Lo, C.-Y. Thermoresistive Strain Sensor and Positioning Method for Roll-to-Roll Processes. Sensors 2014, 14, 8082-8095.

AMA Style

Liao K-H, Lo C-Y. Thermoresistive Strain Sensor and Positioning Method for Roll-to-Roll Processes. Sensors. 2014; 14(5):8082-8095.

Chicago/Turabian Style

Liao, Kuan-Hsun; Lo, Cheng-Yao. 2014. "Thermoresistive Strain Sensor and Positioning Method for Roll-to-Roll Processes." Sensors 14, no. 5: 8082-8095.


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