Force Sensors for Measurement Applications
Learn about different types of force sensors such as Force Sensitive Resistor, Strain Gauge, and Piezoelectric sensors used in various applications. Explore how these sensors work and their characteristics to determine their suitability for different scenarios.
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Presentation Transcript
FLEX/FORCE SENSOR GT ECE ACADEMIC LAB SLIDES BY ZACHARY CHAN
OVERVIEW Force sensors work by changing resistance in response to a force and converting the resistance into a force measurement Some types of force sensors: Force Sensitive Resistor Strain gauge Piezoelectric
FORCE SENSITIVE RESISTOR Force sensing resistors have a semiconductor polymer film When a force is applied to the film, the resistance of the film changes Low cost and simple, but they are low accuracy because they can not detect exactly how much force is being applied to them
STRAIN GAUGE When tension is applied to a film containing conductive material, the conductive material lengthens, resulting in a higher resistance When compression is applied to the film, the conductive material shortens, resulting in a lower resistance Often uses a Wheatstone Bridge circuit to increase and decrease resistance according to length and output a varying voltage accordingly
PIEZOELECTRIC SENSORS Use piezoelectric crystals to detect and quantify motion (mechanical stress causes a potential difference proportional to the stress applied) Often used for oscillating motion and cyclic processes
