Wind Vector Calculation Using Multi-Lidar Data Aggregation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Laser radar devices installed behind wind turbine blades often have their laser light shielded by the blades, leading to low effective data acquisition rates for wind direction and speed calculations, especially at low wind speeds or when the turbine is stationary, as they require multiple line-of-sight measurements to calculate wind vectors, which are hindered by the shielding objects.
Innovation Solution
A data processing device that communicates with multiple laser radar devices to aggregate and manage line-of-sight wind-speed values, selecting valid data within a set time period and using a central processing unit to calculate wind vectors, thereby integrating data from multiple sources to overcome shielding issues and improve data acquisition rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a laser radar device is installed behind wind turbine blades to measure wind vectors, then wind direction and speed can be detected for power generation optimization, but the blades shield the laser light and prevent data acquisition when the turbine is stationary or wind speed is low
Solution Approach 1:
The patent combines data from multiple laser radar devices (at least two devices) to calculate wind vectors. When one device is shielded by turbine blades, other devices can still acquire valid line-of-sight wind-speed data, ensuring continuous wind vector calculation capability and improving the effective data acquisition rate.
Solution Approach 2:
The patent introduces a temporal dimension by selecting line-of-sight wind-speed values within a predetermined time period from multiple measurement instances. This allows the system to use historically valid data to compensate for currently shielded measurements, maintaining measurement precision without requiring simultaneous unshielded views from all devices.
2Measurement precision
If the laser radar device waits for the shielding object to move before calculating wind vectors, then accurate measurements can be obtained, but the data acquisition time increases and effective data acquisition rate decreases
Solution Approach 1:
The system pre-acquires and stores line-of-sight wind-speed values from multiple laser radar devices over time. When calculating wind vectors, it selectively uses previously acquired valid data within a predetermined time period, eliminating the need to wait for shielding objects to move and reducing data acquisition time while maintaining measurement accuracy.
3Reliability
If multiple laser radar devices are used to overcome shielding, then data availability improves, but system complexity and cost increase
Solution Approach 1:
The patent employs multiple laser radar devices that perform identical functions (measuring line-of-sight wind-speed) but are positioned at different locations. This redundant configuration increases reliability and data availability by ensuring that if one device is shielded, others can still provide valid measurements, without requiring different device types or complex specialized functionalities.
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 allows for continuous wind vector calculation without waiting for the shielding object to move, enhancing the effective data acquisition rate by integrating data from multiple laser radar devices and reducing the impact of shielding on data availability.
Implementation Method 1
a laser radar device which emits laser light into the atmosphere, receives scattered light from aerosol, and calculates a value of line-of-sight wind-speed from a Doppler frequency of the scattered light
Implementation Method 2
receives scattered light from aerosol
Data Source
AI summary
A data processing device of the present invention includes: a data communication device configured to communicate with a laser radar device to acquire a value of line-of-sight wind-speed, a laser emission angle, attitude information, position information, and a time; a storage device configured to store the value of line-of-sight wind-speed and the time; a central processing unit configured to run a data selector to select a value of line-of-sight wind-speed stored in the storage device and being present within a set time period from a time about the value of line-of-sight wind-speed which is newly acquired by the data communication device, and configured to run a wind vector calculator to calculate a wind vector using the newly acquired value of line-of-sight wind-speed and using the selected value of line-of-sight wind-speed; and a memory configured to preserve the data selector and the wind vector calculator.