WeatherStation Monitoring for Industrial marine Applications

Transcription

1 WeatherStation Monitoring for Industrial marine Applications

2 PB200 WeatherStation Instrument Applications: Industrial marine weather monitoring Features: True and Apparent Wind Speed and Direction Barometric pressure Air Temperature Wind Chill Temperature Heater to prevent ice build-up in wind channel Three axis accelerometer for Pitch & Roll GPS (WAAS / EGNOS) 3 axis compass with yaw rate gyro +/- 1º for pitch and roll angles 5 +/- 2º for pitch and roll angles 30 +/- 3º for pitch and roll angles Both NMEA 0183/RS422 & NMEA 2000 Outputs

3 LB150 WeatherStation Instrument Applications: All Land based, fixed-location weather monitoring Features: True and Apparent Wind Speed and Direction Barometric pressure Air Temperature Wind Chill Temperature Relative Humidity Heat Index Dew Point Heater- prevents ice build-up in wind channel Three axis accelerometer for Pitch & Roll GPS (WAAS/EGNOS) 2-Axis Solid State Compass NMEA 0183 / RS422 data output

4 Wind Calculations Four ultrasonic transducers operate in pairs one transducer injects a pulse into the air. The pulse bounces off the metal plate at the bottom of the wind channel and is carried by the wind to arrive at the listening transducer a short time later. When there is no wind, the pulse travels at the speed of sound from the sender to the receiver. Whenever the wind is blowing in that direction, the pulse will arrive sooner than if the air is still. Similarly, whenever the wind is blowing in the opposite direction, the pulse will arrive later than if the air is still.

5 Wind Calculations The four transducers take turns in sending and receiving pulses. A microprocessor within the WeatherStation then combines the measurements from all four transducers to calculate the resultant wind speed and direction. Throughout this process, the sensor monitors the air temperature, to compensate for the fact that the speed of sound in air changes with temperature.

6 Wind Speed Range 0 knots to 80 knots (0 to 92 MPH) Wind Speed Resolution 0.1 knot (0.1 MPH) Wind Speed 0 C to 55 C (32 F to 131 F), No Precipitation Low Wind Speeds 0 knots to 10 knots (0 MPH to 11.5 MPH); ±1 knot (±1.1 MPH) +10% of reading High Wind Speeds 10 knots to 80 knots (11.5 MPH to 92 MPH); ±2 knots (2.3 MPH) or 5% RMS, whichever is greater Wind Speed Accuracy in Wet Conditions 5 knots (5.7 MPH) RMS

7 Wind Direction Range 0 to 360 Wind Direction Resolution 0.1 Wind Direction 0 C to 55 C (32 F to 131 F),No Precipitation Low Wind Speeds 4 to 10 knots (4.6 MPH to 11.5 MPH) 6 RMS Typical High Wind Speeds (>10 knots (>11.5 MPH)) 3 RMS Typical Wind Direction Accuracy in Wet Conditions 8 RMS >8 knots

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9 Competitive Wind Products Gill Windsonic Apparent wind speed & direction ONLY RM Young Apparent wind speed & direction ONLY Viasala Apparent wind speed & direction ONLY Airmar LB150- True and Apparent Wind Speed and Direction, Barometric pressure, Air Temperature, Wind Chill Temperature, Relative Humidity, Heat Index, Dew Point, Accelerometer for Pitch & Roll, GPS, Compass Airmar PB200-True and Apparent Wind Speed and Direction, Barometric pressure, Air Temperature, Wind Chill Temperature, Accelerometer for Pitch & Roll, GPS, High-Accuracy Compass, Rate Gyro

10 Airmar Weatherstation data collected in on site wind tunnel. All other instrument data is based on independent test data Airmar wind speed & direction accuracy vs. Gill

11 Airmar wind speed & direction accuracy vs. RM Young Airmar Weatherstation data collected in on site wind tunnel. All other instrument data is based on independent test data

12 Airmar Weatherstation data collected in on site wind tunnel. All other instrument data is based on independent test data Airmar wind speed & direction accuracy vs. Viasala

13 Airmar LB150 Air Temperature Accuracy Air Temperature Range -25 C to 55 C (-13 F to 131 F) Air Temperature Resolution 0.1 C (0.1 F) Air Temperature Accuracy ±1 C (±1.8 >4 knots (>4.6 MPH) wind

14 Low temperature accuracy-heater ON

15 Airmar LB150 relative humidity accuracy Humidity Range 10% to 95% RH Humidity Accuracy ±4% units RH

16 PB200 Compass Dynamic Motion Accuracy 1 RMS when level 2 RMS for pitch and roll angles up to 30 3 RMS for pitch and roll angles up to 45 Pitch and Roll Range/Static Accuracy ±50 / <1

17 Operation in the Polar Magnetic Environment 3D calibration precisely correlates the magnetometer and accelerometer axes Helmholtz cage testing with >85º magnetic inclination has demonstrated better than 3º accuracy

18 WeatherStation Connection Options Cable lengths from 6 meters to 45 meters are available Standard RS422 to RS232 converters have been approved for use Cable lengths can be extended up to 300 meters NMEA 0183/RS422 to USB Converter NMEA 0183/RS422 bare wire application NMEA 2000 to USB NMEA 0183/RS422 to USB Combiner with Additional NMEA 0183/RS422 input / output

19 WeatherCaster PC Software

20 WeatherCaster PC Software

21 Testing & Calibration Two on-site wind tunnels Used for wind speed & direction calibration

22 Testing & Calibration Environmental chamber Tests for: -Temperature cycling -Humidity

23 Testing & Calibration Scorsby Table Calibrates 3D compass Tilt Robot Precisely tunes accelerometers for accurate pitch and roll data