Turbine rotor blade and motion sensor for measuring speed of a substance.
A turbine rotor sensor is used to measure the speed of a substance passing through the inside of the turbine. A turbine consists of a series of blades mounted around a rotatable shaft which runs parallel and centrally within a tube or pipe. The rotor blades are angled enough to generate sufficient rotation and performance whilst keeping any interference with the measured quantity to a minimum.
There a few ways to measure the rotation speed of the turbine; magnets are fitted to the blades and a stationary magnetic pickup sensor mounted close to the outer circumference of the turbine counts each time a blade passes; a photoelectric cell is used instead of a magnetic pickup; or a gearing mechanism linked to a rotational sensor is attached directly to the turbines rotating shaft.
Each of the above sensing methods will generate a counting signal, which when combined with the time measurement will produce a rotational speed signal which is proportional to the speed of the substance moving through the turbine.
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Glossary of Sensor Technology technical terms
- BFSG – Bonded Foil Strain Gauge
- Bourdon Tube
- Capacitive Fluid Level Measurement
- Ceramic Pressure Sensors
- Conductive Fluid Level Detection
- Doppler Effect Flow Measurement
- Float Fluid Level Detection
- LVDT – Linear Variable Differential Transformer
- Paddle Wheel Sensor
- Piezoresistive Strain Gauges
- Positive Displacement Flow Measurement
- Radar Distance Sensing
- SOI – Silicon on Insulator
- Strain Gauge
- Thin Film
- Transit Time Flow Measurement
- Ultrasonic Distance Sensing
- Ultrasonic Flow Velocity Sensors
- Vibrating Tuning Fork Fluid Level Detection
- Vortex Flow Measurement
- Wheatstone Bridge Strain Gauge
