Cantilever-Sensor (CLS)
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Condition Monitoring / CMS – Condition Monitoring System / Modules and Sensors The Cantilever-Sensor is a new product in the Bachmann portfolio, designed for the continuous recording of structural loads on the rotor blades of wind turbines. Cantilever sensors measure strain, producing a value comparable to the output from electrical strain gauges or fibre-optic strain sensors. However, by using an inductive displacement measurement L the CLS itself is not subject to mechanical deformation. Compared to conventional sensor technologies, the robust design of the CLS offers the following advantages: • The measurement principle guarantees the long-term stability of the sensor. L+ s • The longer reference distance minimizes the influence of local inhomogeneities, typical of composite materials used for blade construction. • The installation is simple and reproducible. Schri : grau 50%, wurde für Flayer verwendet Cantilever-Sensor (CLS) with Step Protection Measurement principle Bla biegung in Schlagrichtung Windanströmung Pressure side Leading edge Trailing edge The CLS has a wide range of applications: L- s • The signal provides real time blade loading information s uitable for individual pitch control. • Continuous recording of the signal allows a facility-specific estimation of the remaining service life. • Comparison between the different blade loadings on a single wind turbine can identify problems such as pitch errors or individual blade damage. • The response time and sensitivity enable sampling rates sufficient to capture structural oscillations of the blade, for ice Windanströmung Wind direc on detection, and structural integrity studies. Bending edgewise The monitoring of critical blade loads was the main focus for Druckseite Pressure side developing the CLS. The use of CLS signals for individual pitch control allows coordination between turbine design and operational Vorderkante Hinterkante Leading edge Trailing strategy in a load-optimized way in order to considerably reduce edge the levelized cost of energy of modern turbines. Saugseite It also enables further specific adjustment of the pitch control strategies, either to maximise output or to extend life, providing further significant savings. Wind direc on Pressure side Leading edge Trailing edge Installation schematic in the rotor blade Bachmann electronic GmbH • 11/2021 • Specification subject to change – the product’s characteristics are exclusively governed by the data of

Condition Monitoring / CMS – Condition Monitoring System / Modules and Sensors Cantilever-Sensor Dimensions Total length Effective reference length L Cantilever material Titanium, thermal expansion coefficient 8.6e-06 / K Target material Technical Data – Sensor Element Displacement / Strain Inductive Displacement: ±1 mm ≤ 0.2 kHz Response time Temperature coefficient Signal type Output connection Pin layout 5 Male connector axial, M12x1, A-coded, 5 poles 3 4 Schri : grau 50%, wurde fü Signal bandwidth Measurement range Measurement principle Storage temperature Protection class Supply...