What is a force sensitive resistor used for?

What is a force sensitive resistor used for?

Computer input devices: Force sensitive resistors are used to control the force and speed of the cursor movement. Industrial applications: Force sensitive resistors are used in brakes, seat occupancy detection, motor speed control and mirror adjustor.

Do force sensitive resistors measure force?

On their own, force sensing resistors are not pre-calibrated to correlate a force reading to a known engineering unit. However, the force measurement output captured by a force sensing resistor can be correlated to the applied force through a calibration procedure.

How does force sensor work?

By definition, force sensor is a type of transducer, specifically a force transducer. It converts an input mechanical force such as load, weight, tension, compression or pressure into another physical variable, in this case, into an electrical output signal that can be measured, converted and standardized.

What are resistive sensors?

A resistive sensor measures changes in electrical resistance caused by the application of force, e. g. by mechanical stretching, for example, as for strain gauges (also see Sensor).

How is a force sensor made?

Most force sensors are created with the use of force-sensing resistors. Such sensors consist of electrodes and sensing film. Force-sensing resistors are based on contact resistance. These contain a conductive polymer film, which changes its resistance in a predictable way once force is applied on the surface.

How do you calibrate a FSR sensor?

The calibration procedure was simple:

  1. Place calibrated masses atop the 3D printed platform of the RP-S40-ST force sensing resistor.
  2. Measure the resulting resistance value outputted by the FSR using Arduino.
  3. Curve fit the resulting resistance vs.
  4. Perform independence tests to verify the fit.

How do you hook up a FSR sensor?

The easiest way to measure a resistive sensor is to connect one end to Power and the other to a pull-down resistor to ground. Then the point between the fixed pulldown resistor and the variable FSR resistor is connected to the analog input of a microcontroller such as an Arduino (shown).

What are the types of resistive sensors?

Types of Resistive Sensors – Transducer, Potentiometer and Strain Gauge.

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