Post on 03-Jan-2016
Real time mobile sensing of the environment
Peter LandshoffRod JonesMichael SimmonsEiman KanjoIq MeadMark HayesMark Calleja
NO2 mobile sensing:
[Calleja]
GPS(location)
GPRS(data
transmission)
SENSORS
archive
Real time data processing/ data
assimilation
PRODUCTS
Environment…..Regulation……Exposure…..Transport…..……
Other data(met, traffic….)
mobilesensor networkCombine technologies to
provide sensitive low cost sensor network
[Kanjo, Louden, Mead]
[Hayes]
Changes in air quality driven by both traffic and meteorology
Pollution events
Sensor reproducibility
Multiple species measurement
[Stewart, Jobalja, Mead]
Carbon Monoxide
Multi-species real time high spatial resolution mapping of air quality in complex environments
Nitrogen Dioxide
Nitric Oxide
Urban composition is highly structured, variable, interdependent and complex….[Stewart, Jobalja, Mead]
Sensors 14:30-14:45 14:45-15:30 15:30-16:30 16:30-17:20 17:20-17:30
A12 (gp1) Chem ZONE A ZONE B ZONE C CCB
A13 (gp1) Dept.
A15 (gp2) ZONE B ZONE C ZONE A
A16 (gp2)
A17 (gp3) ZONE C ZONE A ZONE B Chem
A19 (gp3) CCB Dept.
• 29/01/2009
• 14:30 - 17:30
•Central Cambridge split into 3 zones (A, B & C)
• 6 sensors divided into 3 groups.
• A14 joined expt. at 16:30.
CCB
Chem Dept
Preliminary comparison with validated site (CCC)
Laboratory cal/cross interference
Junction (Very high traffic density)
High traffic density
Static traffic
Moderate traffic density
Low traffic density
No traffic
Gonville Place, 15:48 [CO] = 2,000 ppb
Lensfield Rd, 14:47 [CO] = 714 ppb
Emmanuel Rd, 17:10 [CO]= 1,062 ppbA12 30s COA12 30s CO
Central Central CambridgeCambridge
Bus Station, 16:14 [NO] = 1. 527 ppm
Zone B average,14:45-15:30 [NO] = 0.151 ppm
Zone A average,16:30-17:20 [NO] = 0.163 ppm
A15 30s NOA15 30s NO
Zone A Zone A CambridgeCambridge
Lensfield Rd, 17:07 [NO] = 392.9 ppb
A15 30s NOA15 30s NO
Zone C Zone C CambridgeCambridge
Emmanuel Rd, 16:14 [NO] = 820 ppb
A15 30s NOA15 30s NO
Zone B Zone B CambridgeCambridge
Gonville Place, 15:35 [NO] = 358 ppb
15:01-15:04
All conc. in ppb
[CO] = 126 ± 15[NO] = 188 ± 42[NO2] = 30 ± 3
[CO] = 186 ± 17 [NO] = 59 ± 15[NO2] = 31.8 ± 0.5
[CO] = 260 ± 22 [NO] = -13 ± 5[NO2] = 26.7 ± 0.3
[CO] = 89 ± 26 [NO] = -33 ± 5[NO2] = 29.5 ± 0.8
[CO] = 84 ± 14[NO] = 83 ± 15 [NO2] = 31.8 ± 0.5
[CO] = 616 ± 22 [NO] = 12 ± 6 [NO2] = 30.7 ± 0.5
16:01-16:04
All conc. in ppb
[CO] = -1 ± 17 [NO] = 105 ± 16[NO2] = 26.9 ± 0.3
[CO] = 31 ± 6 [NO] = 37 ± 7[NO2] = 31.9 ± 0.8
[CO] = 133 ± 28[NO] = 43 ± 12[NO2] = 34.1 ± 0.7
[CO] = 137 ± 9 [NO] = 60 ± 7 [NO2] = 29.9 ± 0.6
17:01-17:04
All conc. in ppb
[CO] = 31 ± 12[NO] = 43 ± 10[NO2] = 29.8 ± 0.5
[CO] = 133 ± 3 [NO] = -11 ± 3[NO2] = 30.1 ± 0.3
[CO] = -26 ± 5[NO] = 190 ± 19[NO2] = 27.7 ± 0.2
[CO] = 192 ± 19[NO] = 145 ± 19[NO2] = 36 ± 2
[CO] = 57 ± 23[NO] = 23 ± 8 [NO2] = 33.0 ± 0.6
Technical progress• Phone software now robust (run-time >8 hours) • Visualisation now implemented using Google Earth
browser plug-in• eScience interface to database (OGSA-DAI)
implemented
Ongoing work
• Characterization of data quality & database cleansing
• Automatic data post-processing• Preparation for June 30th event• Logistics for large scale Cambridge
deployment
Map divided into zones
Areas covered in Central Valencia
2.28 Km
2.69 Km
CO overview, 8 sensors boxes
Exhaust Plume: in situ sensor detection of NO, NO2, CO
Wind direction
4 take-offs a.m. and p.m. clearly seen in NO2
New result: detection of aircraft plume using portable low cost mobile sensors (NO, NO2, CO)
Take-offs:
Courtesy of OMEGA:www.omega.mmu.ac.uk
Summary and future directions
Achievements•Low cost mobile sensor unit for real time NO, NO2 and
CO, including GPS, GPRS•Multiple sensor network (currently 20 units)•Data capture
Future (within MESSAGE)•Extend to > 60 units•Extend to CO2, VOCs, SO2
Future (beyond MESSAGE)•Additional species, aerosols•NERC/LHR?
Robin’s last slide?