The acceleration sensor GAM900S from Baumer (Germany) provides a control system with precise acceleration information via CANopen or an analog interface. It is used in wind turbines.
VIBRATIONS ARE AN EVERYDAY OCCURRENCE at machines and installations. The acceleration sensor GAM900S detects both vibration and shock to provide the machine control with the information via CANopen or an analog output. The safety relay output can be integrated in any safety system and is activated as soon as the defined default limit is exceeded.
Four factory-configured frequency bands with different filters enable tuning to the requirements of the individual type of installation. In wind turbines, the acceleration sensor is predestined for implementation of the safety function “protection against excessive shocks and tower vibrations”. Permanent monitoring prevents damage or even destruction of the installation. For corrosive environments of the C5M category, the housing design made of glass-fiber reinforced plastic is ideal and ensures safe longterm operation in offshore installations.
Since the acceleration sensor provides the control system with precise acceleration information via CANopen or an analog interface, vibrations can be reduced prior to reaching critical amplitudes. The selected capacitive MEMS sensors operate with precision, especially at small amplitudes, where measuring errors due to cross-axis-sensitivity can be neglected. Therefore, the sensor is suited for precise acquisition of vibrations e.g. at wind towers.
Vibration-caused measuring distortions cannot be excluded, even if acceleration sensors are attached to solid, load-bearing machine parts. The sensor utilizes low-pass or band-pass filters up to the 8th order to suppress parasitic frequencies, as generated for example by yaw brakes in wind turbines. Offset errors caused by installation errors or temperature drifts are compensated while accuracy is enhanced.
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