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RuneGangeskar

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Published on November 7, 2007

Author: Alohomora

Source: authorstream.com

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MIROS Range Finder:  MIROS Range Finder MIROS A/S Rune Gangeskar & Elisabeth Nøst GLOSS Workshop 14 - 16 October 2003 Presentation of sensor, principles of design and associated software. References on uses. Slide2:  SM-094 Range Finder 3 cm wave length Microwave-based Range Finder Slide3:  Statistical description of range / water level Wave spectrum & wave height SM-094 Range Finder Range time series 3 cm wave length Microwave-based Range Finder Slide4:  Types Range Finder SM-094/10 SM-094/20W SM-094/20N SM-094/50 SM-094/85 1 to 10 m 1 to 20 m 3 to 20 m 3 to 50 m 3 to 85 m 10 degrees beam width 5 degrees beam width Slide5:  Some essential specifications Range Finder Emitted frequency Weight Power Accuracy averaged measurements Accuracy single measurement Emitted power Dimensions Digital interface ~ 1 mm ~ 1 cm 70 x 510 x 420 mm 7 kg 22 - 32 V. 0,2 A 9,4 - 9,8 GHz 0,25 mW RS-422 / RS-232 Analog output 0 - 10 V Slide7:  Digital interface -Character code -Number of data bits -Speed -Electric interface -Parity -Stop bits RS-422 (standard) RS-232 ASCII 9600 baud 8 None 1 -Data format hh.hhh<HT>aa.aaa<CR><LF> -Power on text MIROS altimeter digital signal processing started Noise spectrum is cleared Range Finder Slide8:  -Frequency modulated signal: 9,4 - 9,8 GHz -Range ~ Delay ~ Frequency -Integration over up-down-sweep eliminates Doppler contribution Range Finder Measurement principle Slide9:  Range Finder Emitted signal Received signal Difference- frequency Signal processing (briefly) Slide10:  Range Finder Provides side lobe damping contents of the signal Hamming- windowing FFT (Fast Fourier Transform) Finds the frequency Emitted signal Received signal Difference- frequency Signal processing (briefly) Slide11:  Range Finder Pier, platform structure,... Top detection Threshold detection Removal of fixed echoes (optional) Provides side lobe damping contents of the signal Hamming- windowing FFT (Fast Fourier Transform) Finds the frequency Emitted signal Received signal Difference- frequency Signal processing (briefly) Slide12:  Interpolation Tracking Range Finder Pier, platform structure,... Top detection Threshold detection Removal of fixed echoes (optional) Provides side lobe damping contents of the signal Hamming- windowing FFT (Fast Fourier Transform) Finds the frequency Emitted signal Received signal Difference- frequency Signal processing (briefly) Slide13:  Tracking (internal) Eliminates effects of: -Multi-path -Multiple time around -Lost signal for a short period Range Finder Slide14:  Software parameters tout win wtc det Detection level Tracking window time constant Tracking window size Lost signal time-out Range Finder Slide15:  Software parameters atc htc ser tout win wtc det Detection level Tracking window time constant Tracking window size Lost signal time-out Analogue or digital signal output Data averaging time constants Range Finder Slide16:  Software parameters ntc ch help atc htc ser tout win wtc det Detection level Tracking window time constant Tracking window size Lost signal time-out Analogue or digital signal output Data averaging time constants Suppression of fixed echoes time constant Actual measurement range List all available commands all Print current parameter settings Range Finder Slide17:  Range Finder Digital Signal Processor (DSP) Miros is now finishing the work with a new generation Range Finder Several new features: -Internal data storage with capacity of years of data -Internal processing of time series to obtain wave information -Higher data output rate (up to 100 Hz) -Higher utilization of electromagnetic return from sea surface Top Bottom Slide18:  MirAdm04 System Manager MirSip09 Water Level Interface MirPro08 Time Series To Spectrum MirPro10 Wave Spectrum Processing MirPresF Display System Water Level Software Slide19:  MirAdm04 System Manager MirSip09 Water Level Interface MirPro08 Time Series To Spectrum MirPro10 Wave Spectrum Processing MirPresF Display System Water Level Software Slide31:  Range Finder References on uses Miros has up to now delivered about 35 range finders with good operational results Range Finder used in tide level projects: -Trondhjem (ref. Sea Technology, September 2002) -ESEAS, Villagarcía in Spain -NOAA -Incheon Test Site in Korea -Offshore context: Draugen, Heidrun Slide32:  Range Finder References on uses Miros has up to now delivered about 35 range finders with good operational results Range Finder used in tide level projects: -Trondhjem (ref. Sea Technology, September 2002) -ESEAS, Villagarcía in Spain -NOAA -Incheon Test Site in Korea -Offshore context: Draugen, Heidrun NOAA has used several sensors for bridge clearance measurements Range Finder has been used on military and commercial very high speed vessels -Air gap monitoring -Structural testing Range Finder has been used on platforms -Air gap, subsidence -Non-directional wave monitoring

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