Stretch sensor

A stretch sensor is a sensor which can be used to measure deformation and stretching forces such as tension or bending. They are usually made from a material that is itself soft and stretchable.

Most stretch sensors fall into one of three categories. The first type consists of an electrical conductor for which the electrical resistance changes (usually increases) substantially when the sensor is deformed.[1]

The second type consists of a capacitor for which the capacitance changes under deformation.[2][3] Known properties of the sensor can then be used to deduce the deformation from the resistance/capacitance. Both the rheostatic and capacitive types often take the form of a cord, tape, or mesh.

The third type of sensor uses high performance piezoelectric systems in soft, flexible/stretchable formats for measuring signals using the cabality of piezoelectric materials to interconvert mechanical and electrical forms of energy.[4]

Applications

Wearable stretch sensors can be used for tasks such as measuring body posture or movement.[5][6]

They can also be used in robotics, particularly in soft robots.

See also

References
  1. "Conductive Rubber Cord Stretch Sensor + extras!". Adafruit Industries. Retrieved 2019-06-07.
  2. "Master The Fundamentals Of Stretch-Sensor Sensitivity". Sensors Magazine. Retrieved 2019-06-07.
  3. "StretchSense". Soft Robotics Toolkit.
  4. Dagdeviren, Canan; Joe, Pauline; Tuzman, Ozlem L.; Park, Kwi-Il; Lee, Keon Jae; Shi, Yan; Huang, Yonggang; Rogers, John A. (2016). "Recent progress in flexible and stretchable piezoelectric devices for mechanical energy harvesting, sensing and actuation". Extreme Mechanics Letters. 9 (1): 269–281. doi:10.1016/j.eml.2016.05.015.
  5. "Disposable Skin Stretch Sensor". TU Delft. Retrieved 2019-06-07.
  6. Huang B, Li M, Mei T, McCoul D, Qin S, Zhao Z, Zhao J (November 2017). "Wearable Stretch Sensors for Motion Measurement of the Wrist Joint Based on Dielectric Elastomers". Sensors. 17 (12): 2708. doi:10.3390/s17122708. PMC 5751736. PMID 29168775.
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