flex sensor
A flex sensor or bend sensor is a sensor that measures the amount of deflection or bending. Usually, the sensor is stuck to the surface, and resistance of sensor element is varied by bending the surface. Since the resistance is directly proportional to the amount of bend it is used as goniometer, and often called flexible potentiometer.
Types of flex sensor
- Conductive ink based flex sensor{{Citation|title=Flexible potentiometer|date=1995-06-06|url=https://patents.google.com/patent/US5583476A/en|accessdate=2018-04-17}}
- Fibre optic flex sensor{{Citation|title=Optical flex sensor|date=1982-09-29|url=https://patents.google.com/patent/US4542291A/en|accessdate=2018-04-17}}
- Capacitive flex sensor{{Citation|title=Capacitive bend sensor|date=1995-06-28|url=https://patents.google.com/patent/US5610528A/en|accessdate=2018-04-17}}
- Velostat flex sensor (popular among hobbyists)
Applications
Flex sensors are used in wide areas of research from computer interfaces, rehabilitation, security systems and even music interfaces.{{Cite journal|last=Sreejan|first=Alapati|last2=Yeole|first2=Shivraj|date=2017-07-01|title=A Review on Applications of Flex Sensors|url=https://www.researchgate.net/publication/318850816|journal=International Journal of Emerging Technology and Advanced Engineering|volume=7|pages=97–100}} It is also famous among students and hobbyists.
= Human Machine Interface devices =
A dataglove is a human-computer interaction device that is made possible by flex sensors. Deflections of a dataglove are measured via its flex sensors embedded in the glove.
= Rehabilitation Research =
In rehabilitation research, wired gloves or datagloves are used to record joint movement.{{Cite journal|date=2014-01-01|title=A novel array of flex sensors for a goniometric glove|journal=Sensors and Actuators A: Physical|language=en|volume=205|pages=119–125|doi=10.1016/j.sna.2013.10.030|issn=0924-4247|last1=Saggio|first1=Giovanni}}
= Security Systems =
Movement of doors is monitored by placing the sensor at the hinge. Also, damage to metal structures can be identified using the sensor.{{Citation|last=Sreejan Alapati|title=Flex sensor array|date=2019-12-15|url=https://www.researchgate.net/publication/320892541_DEVELOPMENT_OF_FLEX_SENSOR_ARRAY_TO_IDENTIFY_DAMAGE_ON_SHEET_METAL|accessdate=2019-12-15}}{{Citation|last=Sreejan Alapati|title=This technology can detect damage on your car and locker!|date=2018-04-01|url=https://www.youtube.com/watch?v=3zGCeAGcNtg&t=36s|accessdate=2018-04-17}}
References
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- {{cite web|title=Flexion|url=http://www.sensorwiki.org/doku.php/sensors/flexion}}