Force sensors are devices used to measure the force or load applied to them. They are commonly used in various applications, including industrial, automotive, robotics, and medical fields. Read more about force sensors.
Here are some of the different types of force sensors:
Strain Gauge Load Cells:
Strain gauges are the most commonly used force sensing technology. Load cells based on strain gauges measure the strain experienced by the gauge when a force is applied, which is then converted into an electrical signal proportional to the force. They are available in various configurations, such as beam, shear, and S-type load cells.
Piezoelectric Force Sensors:
These sensors use the piezoelectric effect, where certain materials generate an electrical charge when subjected to mechanical stress. When a force is applied to a piezoelectric sensor, it generates an electrical output proportional to the force magnitude. They are known for their high-frequency response and dynamic range.
Capacitive Force Sensors:
Capacitive force sensors operate based on the change in capacitance between two conductive surfaces when a force is applied. The capacitance varies with the distance between the surfaces, which changes when force is applied. The change in capacitance is then converted into a corresponding electrical signal.
Magnetic Force Sensors:
Magnetic force sensors measure the force between two magnets or a magnet and a ferromagnetic material. When a force is applied, the magnetic field strength changes, which is detected by the sensor. These sensors are often used in non-contact force measurement applications.
Optical Force Sensors:
Optical force sensors utilize optical principles to measure force. They typically involve the use of optical fibers, gratings, or interferometers. When a force is applied, it alters the optical properties, such as the light intensity or phase, which can be measured to determine the force magnitude.
Load Buttons and Compression Cells:
Load buttons and compression cells are compact force sensors designed to measure compression or tension forces. They consist of a load-sensitive element, such as a strain gauge or a piezoelectric material, integrated into a button or a cylindrical shape.
Force Sensing Resistors (FSRs):
FSRs are resistive sensors that change their resistance in response to applied force. They consist of a conductive polymer material with interlocking particles. When a force is applied, the particles compress, causing a change in resistance. The resistance change is then measured and correlated to the applied force.
