According to the working principle, it can be divided into: electrical sensors-is a sensor with a wide range of applications in non-electrical electrical measurement technology, commonly used resistance sensors, capacitive sensors, inductive sensors, magnetoelectric sensors and eddy current sensors Wait.
Resistive sensors are made by using a varistor to convert the measured non-electric quantity into a resistance signal. Resistive sensors generally include potentiometer, contact variable resistance, resistance strain gauge and piezoresistive sensors. Resistive sensors are mainly used for the measurement of parameters such as displacement, pressure, force, strain, torque, air flow velocity, liquid level and liquid flow.
Capacitive sensors are made by changing the geometry of the capacitor or changing the nature and content of the medium, so that the capacitance changes. It is mainly used for the measurement of parameters such as pressure, displacement, liquid level, thickness, and moisture content.
Inductive sensors are made by changing the geometric size of the magnetic circuit and the position of the magnet to change the inductance or mutual inductance or the principle of piezomagnetic effect. It is mainly used for the measurement of displacement, pressure, force, vibration, acceleration and other parameters.
Magnetoelectric sensor is based on the principle of electromagnetic induction, which converts the non-electricity to be measured into electric energy. It is mainly used for the measurement of parameters such as flow, speed and displacement. Eddy current sensors are made by the principle of metal cutting magnetic lines of force in a magnetic field to form eddy currents in the metal. It is mainly used for measuring parameters such as displacement and thickness.
Magnetic sensors are made of some physical effects of ferromagnetic materials, and are mainly used for measuring parameters such as displacement and torque. The photoelectric sensor occupies an important position in non-electricity electrical measurement and automatic control technology. It is made by using the photoelectric effect and optical principle of the photoelectric device, and is mainly used for the measurement of parameters such as light intensity, luminous flux, displacement, and concentration.
