The sensor converts the physical quantity to be measured into an electrical signal and processes this electrical signal so that it can be easily transmitted and processed. In addition, the sensor can detect the presence of a target (binary sensor). Or the sensor outputs a measurement (analog/digital sensor).
A sensor consists of three main components
1. The detection area contains sensor-based sensing devices. Different types of sensor types are available based on different technologies for you to choose according to your application.
2. The electronic processor converts the physical quantity to be measured into a charge.
3. The signal output contains the electronics connected to a control system.
Various sensor technologies help you identify and measure your goals. Depending on the technology, the sensor outputs a switching signal or a measured value.
■ The inductive sensor generates an electromagnetic field that triggers eddy currents in the metal target. The sensor recognizes this change.
■ The capacitive sensor produces a capacitive measurement field. If a target enters, the measurement field will change. The sensor responds to this change.
■ Photoelectric sensor (raster) consists of a transmitter and a receiver:
– Diffuse sensors are used to directly detect the target.
– The mirror-transmissive sensor uses a reflector to detect the target.
– There is a separate transmitter and receiver for the beam sensor.
■ The ultrasonic sensor emits a sound pulse in the non-audible range. Analyze the target’s echo.
■Magnetic sensors recognize external magnets. Analyze the strength of the magnetic field generated by the magnet.
■ The magnetostrictive sensor detects the position of the external magnet by detecting the mechanical wave time measurement.