RuneGangeskar

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.

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SM-094 Range Finder 3 cm wave length Microwave-based Range Finder

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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

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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

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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

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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

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-Frequency modulated signal: 9,4 - 9,8 GHz -Range ~ Delay ~ Frequency -Integration over up-down-sweep eliminates Doppler contribution Range Finder Measurement principle

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Range Finder Emitted signal Received signal Difference- frequency Signal processing (briefly)

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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)

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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)

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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)

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Tracking (internal) Eliminates effects of: -Multi-path -Multiple time around -Lost signal for a short period Range Finder

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Software parameters tout win wtc det Detection level Tracking window time constant Tracking window size Lost signal time-out Range Finder

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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

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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

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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

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MirAdm04 System Manager MirSip09 Water Level Interface MirPro08 Time Series To Spectrum MirPro10 Wave Spectrum Processing MirPresF Display System Water Level Software

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MirAdm04 System Manager MirSip09 Water Level Interface MirPro08 Time Series To Spectrum MirPro10 Wave Spectrum Processing MirPresF Display System Water Level Software

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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

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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