A method for determining the inclination of a tower, in particular of a wind turbine, in relation to the gravitational field, by evaluating the output signal from an acceleration sensor configured to pick up static acceleration in the direction of a sensor measurement axis, which method is simple to
A method for determining the inclination of a tower, in particular of a wind turbine, in relation to the gravitational field, by evaluating the output signal from an acceleration sensor configured to pick up static acceleration in the direction of a sensor measurement axis, which method is simple to use and can be carried out on any wind turbines. It is proposed that the acceleration sensor is attached to a component, preferably to a main frame, which can be rotated about the longitudinal axis of the tower in an azimuth angular range of at least 180°, such that the sensor measurement axis is oriented substantially parallel to the plane of rotation of the component, the output signals, in the case of various azimuth angles, being successively measured and recorded by rotating the component between measurements, the inclination being determined by evaluation of the series of measurements obtained.
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1. A method for determining the inclination of a tower, in particular of a wind turbine, in relation to a gravitational field, comprising: evaluating the output signal from an acceleration sensor configured to pick up a static acceleration in the direction of a sensor measurement axis, characterized
1. A method for determining the inclination of a tower, in particular of a wind turbine, in relation to a gravitational field, comprising: evaluating the output signal from an acceleration sensor configured to pick up a static acceleration in the direction of a sensor measurement axis, characterized in that the acceleration sensor is attached to a component, which can be rotated about the longitudinal axis of the tower in an azimuth angular range of at least 180°, such that the sensor measurement axis is oriented substantially parallel to a plane of rotation of the component;successively measuring and recording an output signal, in the case of various azimuth angles by rotating the component between measurements; anddetermining the inclination by evaluation of a series of measurements obtained. 2. The method of claim 1, wherein the component is rotated in uniform azimuth angle steps. 3. The method of claim 1 wherein at any given azimuth angle, a series of output signals is successively measured and recorded and an averaged value is then determined and recorded from the series of output signals and is taken as a basis for the series of measurements. 4. The method of claim 1, wherein the evaluation comprises a determination of a maximum value and of a minimum value of the series of measurements as well as a determination of the difference between the maximum value and the minimum value. 5. The method of claim 1, wherein the inclination is calculated using the following formula: α=arcsin[12amax-aming]wherein α denotes the inclination angle, g denotes the gravitational acceleration, amax denotes a maximum value of the series of measurements and amin denotes a minimum value of the series of measurements. 6. The method of claim 1, wherein the inclination is calculated using the following formula: α=arcsin[12amax-aming·cos(β)]wherein β denotes a tilting of the sensor measurement axis relative to a plane of rotation. 7. The method of claim 1, wherein a tilting of the sensor measurement axis relative to a plane of rotation is determined from the series of measurements, preferably in that an offset of a variable portion of the series of measurements is determined and is considered in the determination of the inclination. 8. The method of claim 1, wherein the offset is determined by forming a sum of a maximum value and of a minimum value and dividing the product by two and subtracting the product from the maximum value. 9. The method of claim 1, wherein the tilting is calculated from an offset using the following formula: β=arcsin[a0g]wherein β denotes the tilting, g denotes a gravitational acceleration and a0 denotes the offset of a variable portion of the series of measurements. 10. The method of claim 1, wherein a second acceleration sensor is attached to the component such that a sensor measurement axis is oriented substantially parallel to a plane of rotation of the component and at a right angle to a sensor measurement axis of a first acceleration sensor, an output signal from a second acceleration sensor being measured and recorded in addition to an output signal from the first acceleration sensor, the inclination additionally being determined by evaluation of a second series of measurements obtained. 11. The method of claim 1, wherein a further acceleration sensor is attached to the component such that a sensor measurement axis is oriented substantially vertically to a plane of rotation of the component, the output signal from a further acceleration sensor being measured and recorded in addition to the output signal from the first acceleration sensor, the inclination additionally being determined by evaluation of a further series of measurements obtained. 12. The method of claim 1, wherein an azimuth angle is determined for any output signal and the series of measurements, a second series of measurements a further series of measurements is supplemented by recording the azimuth angle associated with each output signal, to produce a function graph consisting of ordered pairs, to calculate a direction of the inclination. 13. A system for determining the inclination of a tower, in particular of a wind turbine, in relation to a gravitational field, comprising: an evaluation module configured to evaluating an output signal from an acceleration sensor configured to pick up a static acceleration in the direction of a sensor measurement axis, characterized in that the acceleration sensor is attached to a component, which can be rotated about the longitudinal axis of the tower in an azimuth angular range of at least 180° such that the sensor measurement axis is oriented substantially parallel to a plane of rotation of the component;an output signal recorder and measure module configured to measure and record the output signals, in the case of various azimuth angles by rotating the component between measurements; anda determination module configured to determine the inclination by evaluation of a series of measurements obtained.
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이 특허에 인용된 특허 (2)
Hoffmann, Till; Scholte-Wassink, Hartmut, Methods and apparatus for controlling wind turbine thrust.
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