Rotor Blade Load Sensor Calibration Using Unified Signal Parameterization
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Solution Overview
Problem
Existing methods for measuring loads on wind turbine rotor blades using multiple sensors are prone to installation inaccuracies and require precise calibration, leading to measurement errors and high costs.
Innovation Solution
A method for parameterizing a sensor arrangement on a rotor blade using multiple load sensors, where the sensors are positioned approximately 120° apart, and an overall calculation formula is used to determine load parameters without individual calibration, considering all sensor signals collectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If four sensors are used to measure loads on rotor blades, then measurement coverage in multiple directions is improved, but installation precision requirements increase and costs increase
Solution Approach 1:
The patent combines the calibration process for multiple sensors into a single unified calibration procedure. Instead of calibrating each of the four sensors individually with precise alignment requirements, the invention calibrates the sensor array as a whole system, reducing the cumulative effect of alignment errors and simplifying the calibration process.
Solution Approach 2:
The patent creates a universal calibration approach that works for the entire sensor arrangement rather than requiring separate calibration procedures for each sensor. This universal method accommodates variations in sensor positioning and provides a standardized calibration process that reduces installation precision requirements.
2Measurement precision
If four sensors are used to measure loads on rotor blades, then measurement coverage in multiple directions is improved, but installation complexity and costs increase
Solution Approach 1:
The patent merges the calibration operations for multiple sensors into a single integrated calibration process. This reduces installation complexity by eliminating the need for separate, precise alignment procedures for each sensor and replaces them with a unified calibration approach.
3Measurement precision
If individual calibration is performed for each sensor, then sensor accuracy is improved, but calibration time and error susceptibility increase
Solution Approach 1:
The patent combines individual sensor calibrations into a single simultaneous calibration procedure for the entire sensor array. This reduces calibration time significantly while maintaining accuracy by calibrating all sensors together rather than sequentially, and reduces error susceptibility by minimizing the number of separate calibration operations.
Solution Approach 2:
The patent performs a preliminary unified calibration of the sensor array before deployment, establishing baseline calibration parameters for all sensors simultaneously. This preliminary action eliminates the need for repeated individual calibrations and reduces the time required for subsequent calibration activities.
4Measurement precision
If individual calibration is performed for each sensor, then sensor accuracy is improved, but error susceptibility increases
Solution Approach 1:
The patent merges individual sensor calibrations into a unified calibration process that reduces error susceptibility. By calibrating all sensors simultaneously as a system rather than individually, the method minimizes the accumulation of calibration errors and reduces the reliability risks associated with multiple separate calibration operations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces measurement errors and costs by eliminating the need for precise sensor alignment and individual calibration, providing accurate load parameter calculations through a statistically optimal solution.
Implementation Method 1
Each load sensor detects a load-dependent physical quantity of the rotor blade and outputs a quantity representative of this quantity as the detected sensor quantity
Data Source
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AI summary
Method for parameterizing a sensor arrangement consisting of several load sensors of a rotor blade of a rotor of a wind turbine for detecting at least one load quantity that is representative of a load acting on the rotor blade, wherein the rotor blade has at least three load sensors, each of the load sensors detects a load-dependent physical quantity of the rotor blade and outputs a quantity representative of this as a detected sensor quantity, at least one overall calculation rule is used to calculate the at least one load quantity from the sensor quantities, which establishes a relationship between the detected sensor quantities of all load sensors and the at least one load quantity of the rotor blade, and has several calculation parameters, and the calculation parameters of the overall calculation rule are determined for parameterizing the sensor arrangement while simultaneously taking into account detected sensor quantities of all load sensors.