Noise Monitoring Stations January, 2011 Canada Environmental Noise Seminar Dalimar Instruments.
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Transcript of Noise Monitoring Stations January, 2011 Canada Environmental Noise Seminar Dalimar Instruments.
Noise MonitoringStations
January, 2011Canada Environmental Noise Seminar
Dalimar Instruments
Installation Checklist
• Portable, Semi-Permanent or Permanent• Power – AC or battery w/solar• Meteorological Sensors• Communication• Ease of service• Security
Portable Installations• Watertight case with batteries
– (1-2) 21Ahr batteries– (1) 100Ahr battery
• Tripod• Microphone protection shroud• Extension cable• Software• Security Chain / Padlocks
1 Week Unattended Monitoring
Permanent Installations
• Outdoor microphone/preamplifier• Automated calibration via actuator• Heavy duty mount• Weather sensor integration• Solar charging option• GPS time sync• Remote communication• Security
Outdoor Microphone
• Designed for reliable long-term operation
• Free Field or Random Response• Remote calibration via
electrostatic actuator• Bird spikes, rain hat and UV
treated windscreen• Internal temperature and
humidity sensors**• Window to view desiccant
condition
Electrostatic Actuator• Daily check on NMS operation• Voltage applied to diaphragm
of microphone (simulates SPL)• Output of microphone
compared against reference value
• Automated at quietest time of day
• Calibration history stored
Mounting – Semi Permanent
• Heavy Duty Steel Tripod• Up to 20’ Microphone Height• Adapts to un-even ground• Guy wires to secure against
high winds• Feet staked to ground• Adapters for weather sensors
and solar panel
Mounting – Permanent• 17’ Tilt-Down Pole• Mounted to concrete pad• 20’ Microphone Height• Adapters for weather sensors
and solar panel
Ease of Service
• One man operation• Tilt-down pole for
calibration and service of outdoor microphone
• Desiccant condition viewing window
Inside the Enclosure
• Sound Level Meter can be easily swapped for service
• 831-INT – acts as a docking station
• Ease of access to cables and connections
831-INT Docking Station• Inputs for wind speed and
direction• Logic I/O• Powered USB hub• AC power input• Solar charging input• -ET Version (LAN)
NEMA Enclosure
• Protects against environmental elements
• Fiberglass construction – allows passage of wireless comm
• Allows viewing of SPL and data AT SITE
Security
Lock on tilting mechanism on TRP019 Pole
EPS033 Security Lock on EPS031 or EPS032 enclosure
Specially licensed security screw for EPS031 and EPS032
Weather Sensor Integration• Temperature / Humidity• Wind Speed & Direction• Rainfall
Why Measure Wind Speed & Direction?• Wind speed increases with altitude• Sound is “focused” on downwind side and “shadowed” on
upwind side of source• Distances < 50m, influence is negligible• Measure downwind for least deviation
Courtesy of B&K
Combined Weather Sensors
• Ultrasonic Wind Sensor
• Temperature and humidity
• Rainfall and Hail
• Barometric pressure
• USB connection to 831
• Data integrated in 831 logging data
Why Measure Temperature?• Temperature gradients create effects similar to wind
gradients.• Uniform in ALL directions• Temperature inversions “focus” sound on ground surface
Courtesy of B&K
Logging Meteorological Data• Parameters “logged” in Time History• Min/Max/Average values stored in each Interval
Solar Charging• Ideal for remote locations – no need to run power• Solar panel charges large battery (typically stored
underground)• Multiple size solar panels depending on climate
Battery and Panel SizingBattery• Compute power consumption• Verify max cloudiness - # of days without charging• Check low temperature
Solar Panel• Determine Low-Insolation worst case• Choose solar panel size• How fast will panel charge battery if depleted
Communication Options• Direct – USB, USB extender + intranet, RS-232• Analog Modem• Wireless Model (EDGE)• ADSL
USB Extenders / Intranet• USB Extender
60m / 150 ft– IOgear GUCE51– CablesToGo Super
Booster100m / 328ft
– ICRON USB Ranger 110• USB Intranet Hub
– Digi AnywhereUSB
Alternatives• Long microphone extension
cable and keep 831 close to PC
• Long extension cable from outdoor preamplifier to Sound Level Meter (up to 500’)
• Power microphone and preamp with external supply, long direct voltage input into Sound Level Meter
RS232 Serial port• CBL117 Null modem to PC• DVX008A to 831 Host port• Speed
– 4.5 Kbytes/s at 115200– 3.5 Kbytes/s at 57600
• Wireless RS232– 2 modems– RF Modem– CDMA
Analog Modem• Analog Modem (MDMUSB-A)• POTS line (plain copper end
to end)– No VOIP compression
• Speed– 1.5 to 4.5 Kbytes/s
• Call from modem in PC– Same “sound” as fax
• Software– SLM Utility-G3– DNA / DNA Remote
Wireless Communication
Wireless Modem• MDMUSB-E
– GSM SIM Card– GPRS / EDGE technology– Data plan
• Email program with MAPI– Eg MSOutlook or MS
Outlook Express• TCP/IP port number
– Robust, error checking• Speed
– 2 Kbytes/s
• No calling from analog or other wireless modem
• SMS via wireless when provider does not support SMS, but MMS via mail
• SMS manually – test at installation
(A)DSL / (W)LAN / 3G Ethernet• 831 Docking Station with Ethernet port
– (A)DSL connection– 3G Modem– LAN or WLAN
Leverage standard technology• Speed
– 50-70 Kbytes/s• Applications
– Faster transfer speeds (large files)– Live streaming
Automated Downloading• DNA Remote module supports multiple connections –
analog/wireless/direct• Can connect to multiple stations simultaneously• User selectable download time• Each file tagged with S/N of instrument
Software Options• Download Utility – G3
– Manual connection– Excel export utility– ScreenGrabber
• Advanced - DNA– Real time graphing software– Post processing of data– Automated downloading of data from NMS (remote)
• Airport – ITT / ERA AirScene– Remote hosting of data– Ability to sync noise data with radar tracks– Complaint module
• SDK (Software Developer Kit)
Conclusions
• Environmental protection / security• Critical Questions
– Battery Life– Power Supply
• Multiple Communication Options leverage current technologies
• Software – manual to fully automated operation
Thank YouQuestions?
Dennis PramasAcoustics HellasTel: 210 6630333eMail: [email protected]