FDV302P displacement sensor is a sensor used to measure the displacement or position of objects. They can detect the movement of the object relative to the reference point and convert it into electrical signal output. Displacement sensors are widely used in machinery, engineering, automotive, aerospace and other fields to monitor and control the displacement, position and movement of objects.
The structure types of displacement sensors mainly include resistance, capacitance, inductance, magnetic sensor and optical sensor.
1. Resistance displacement sensor: resistance displacement sensor is a sensor that uses resistance change to measure displacement. Common resistance displacement sensors include potentiometer and strain gauge sensor. The potentiometer determines the displacement by measuring the resistance of the rotary resistor or sliding resistor. The strain gauge sensor measures displacement based on the principle that small deformation will occur when the object is stressed, thus changing the resistance value.
2. Capacitive displacement sensor: The capacitive displacement sensor measures displacement by using the capacitance change between the object and the electrode. When an object moves, the capacitance between the electrodes in contact with it will change. Capacitive displacement sensor usually adopts parallel plate capacitance structure or resonant capacitance structure.
3. Inductive displacement sensor: Inductive displacement sensor uses the change of inductance to measure displacement. Inductive displacement sensor is composed of coil and iron core. When the object moves, the inductance value in the coil will change.
4. Magnetic sensor: A magnetic sensor is a sensor that uses the interaction between an object and a magnetic field to measure displacement. Common magnetic sensors include Hall effect sensor and magnetoelectric sensor. Hall effect sensor determines the displacement by measuring the change of magnetic field. Magnetoelectric sensors use magnetoelectric effects to measure displacement.
5. Optical sensor: optical sensor measures displacement by using the propagation and reflection characteristics of light. Common optical sensors include grating ruler, photoelectric encoder and laser sensor. The grating ruler determines the displacement by measuring the position of the grating. The photoelectric encoder determines the displacement by measuring the number of light pulses received by the photodiode. The laser sensor determines the displacement by measuring the reflection of the laser beam.
The working principle of displacement sensor mainly includes resistance change, capacitance change, inductance change, magnetic field interaction, light propagation and reflection, etc.
Displacement sensors are widely used. In the mechanical field, displacement sensors are often used to measure the position and attitude of robots, control the movement of the manipulator, detect the displacement and deformation of mechanical parts, etc. In the engineering field, displacement sensors are often used to measure the displacement and vibration of bridges, buildings and seismic activities. In the automotive field, displacement sensors are often used to measure the displacement of the vehicle's suspension system, brake system and steering system. In the aerospace field, displacement sensors are often used to measure the attitude, position and vibration of aircraft and spacecraft. In addition, displacement sensors are also widely used in medical equipment, instrumentation, automatic control systems and other fields.
