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Energy technology: wind power, generators, large motors

In order to ensure high efficiency in power plants and large motors, predictive maintenance is an essential factor. Therefore, very high requirements are placed on the sensors in terms of accuracy, reliability and compactness. Sensors from Micro-Epsilon have proved invaluable with regards to safe plant operation in the test bench and in high volume applications.

Expansion measurement on the concrete wall of an energy storage tank

The measured value is transmitted to a PLC via the analog interface (4 ... 20 mA). This allows both computer-controlled process monitoring and complete documentation of the measurement values. If the setpoint is exceeded, an alarm signal is…

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Expansion measurement on the concrete wall of an energy storage tank

Alignment of solar panels

Aligning solar panels in relation to the course of the sun increases the energy yield, and therefore the effectiveness of a solar panel. Only if the solar panels are always at an optimum angle to the sun, can they achieve their maximum output.…

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Ausrichtung von Solarpaneelen

Rotor stress tests in the test bench

Test rigs have been developed for load tests on wind turbine rotor blades and simulate the real loads caused by high winds and weather. The tip of the rotor blade can be distorted by up to 10m due to mechanical loads. Draw-wire sensors are used…

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Rotor stress tests

Noise reduction in wind turbines

Wind turbines generate environmentally friendly power, but are often rather unpopular with their residents in the neighborhood, as they also generate noise. One of the noise sources in wind turbines is the drive train. In particular, gears and…

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Noise reduction in wind turbines

Rotor gap measurement in the generator

In order to monitor rotor behavior in the generator, capacitive displacement sensors measure the gap between stator and rotor. Despite high temperatures and electromagnetic fields, capacitive sensors from Micro-Epsilon provide unmatched…

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Rotor gap measurement in the generator

Measuring the bearing gap in wind turbines

To date, bearing gaps were measured during standstill based on a tactile principle. Therefore, long inspection intervals were required, which in turn, may increase the risk of a complete plant failure. Moreover, these deliberate stoppages…

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Measuring the bearing gap in wind turbines

Monitoring the air flap openings

In order to control air supply, the air flaps automatically open and close depending on the temperature. Draw-wire displacement sensors monitor the position of the open air flap.

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Monitoring the air flap openings

Measuring the deflection of the clutch disc

Eddy current displacement sensors measure the axial, radial or tangential deflection of the clutch disc. These robust sensors are designed for harsh ambient conditions and, due to their extremely compact size, can also be integrated in restricted…

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Measuring the deflection of the clutch disc

Measuring the foundation movement

Laser triangulation sensors measure the distance from the foundation in order to detect the tower movements. High measuring rates enable to detect vibrations directly. Depending on the number of sensors installed, detailed evaluations about the…

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Measuring the foundation movement

Oil gap measurement in shafts

With regard to predictive maintenance, the oil gap should be measured, i.e. the distance between the bearing surface and the shaft filled with lubricants. Despite pressure, high temperatures and lubricants, robust eddy current sensors from…

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Oil gap measurement in shafts

Oscillation measurement of the drive train in wind turbines

Oscillation of the drive train (rotor imbalance, overloading) exceeding the limit values may lead to a failure of components and plant parts. Prerequisite for early recognition of damage and for predictive maintenance is the safe and accurate…

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Schwingungsmessung am Antriebsstrang in Windenergieanlagen

Measuring the temperature of frictional heat on bearings

The gearbox temperature in wind turbines is measured continuously during operation. Heating up of components may indicate a potential problem with a component. If a certain threshold is exceeded, subsequent remedial action can be started or…

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Measuring the temperature of frictional heat on bearings

Monitoring the tower oscillation

Wind turbines are exposed to oscillations and shock loads. In order to avoid damage and expensive downtime, these tower oscillations are monitored. When exceeding limit values, the plant is reliably shut down. From load history, lifetime…

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Monitoring tower oscillation

Measurements on the foundations of wind turbines

To detect tower movements of wind turbines, several laser triangulation sensors measure the distance from the base ring to the foundation. Due to the high measuring rate and accuracy, changes are reliably detected. If the permissible limit values…

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Measurements on the foundations of wind turbines

Nacelle movements

The changes in distance between the nacelle and the ground are used to monitor tower swayings. For this purpose, optoNCDT ILR2250 laser distance sensors are mounted in the nacelle and measure down to the ground. Their high signal stability even…

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Movement of the nacelle