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noiseLab Wind System for Wind Turbine Noise Measurements


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Delta noiseLab Wind System for Wind Turbine Noise Measurements

noiseLAB Wind is a customized system for Wind Turbine noise certification to IEC 61400-11. In addition, it provides raw data recording capabilities, and can also be used for research and development of wind turbine noise. A complete system is available direct from DELTA in a variety of customized configurations.

noiseLAB Wind leverages many  years of experience in close cooperation with the Danish and international wind turbine industry in certification, test, research, and analysis of wind turbine noise. DELTA’s role as the lead contributor to IEC 61400-11 standard, gives it an in-depth understanding of the standard.

The noiseLAB Wind system is DELTA’s second generation of wind turbine noise test system, and leverages many years of internal use of our first generation system. That experience is leveraged to the entire industry with the public availability of noiseLAB Wind. The system has been independently audited applicable ISO quality standards

  • Provision for wireless connections to Microphones via to National Instruments front end (USB NI 9234, 9215 etc.) and WiFi routers up to 1000m line of sight
  • Acoustic Front end and associated signal processing in conformance to section 6 of IEC 61400-11
  • Acoustic Measurement according to section 7.  Sound Power and Tonal Audibility require optional modules
  • Wind speed measurements in conformance to Section 8.2
  • Interface to analog and digital anemometers from Schiltknecht and Risø anemometers
  • RS-232 interface to selected Vestas and Siemens wind turbine control systems for real time logging of process parameters
  • Analog interface to wind turbines with analog outputs for process parameters
  • Input of Wind Turbine Power Curve for automatic detection of “legal” operating wind speeds
  • Input of Wind Shield correction table
  • Real time logging of raw waveforms to disk (tdms format)
  • Logging of noise measurements (Leq, 1/3 octave spectra, FFT spectra) to disk with associated win bin information
  • Real time viewing of input data
  • Real time viewing of histograms of measurements as a function of wind speed bins
  • Real time scatter plots
  • Measurements to IEC 61400-11 and several variations hereof
  • Data storage in Excel and tdms for maximum post processing flexibility
  • FFT Spectra, 1/3 octave Spectra (A weighted and Linear), Wind Turbine parameters, wind speed and direction, derived parameters as per IEC 61400-11
  • FFT spectra output for Tone Analysis to ISO 1996-2 Second Edition Annex C using noiseLAB
  • Wireless microphone connections simplify cabling and set-up
  • Storage of raw time waveforms permits greater data integrity, audit, and flexibility of post-processing options
  • Drivers for selected turbine control systems automatically parses these data
  • Linearization tables for anemometers improve accuracy
  • Correction tables for windshield improves accuracy
  • Robust data recording for high file integrity in case of system crash
  • Works with off-the-shelf hardware for ease of configuration and upgrade possibilities
  • Real Time wind binning lets the user monitor the progress of the measurement
  • Real time scatter plot lets the user view any parameter(s) to permit real time auditing of the integrity of the measurement
  • Automatic detection of “legal” wind speeds based on pre-loaded power curves