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This project has received funding from the European Union’s Seventh Framework Programme for research, technological development and

demonstration under grant agreement no 308524

DESARROLLO DE PLATAFORMAS DE BAJO COSTE PARA LA MEDICIÓN DE LA CALIDAD DE AIRE

MSc. Eng. Leonardo Santiago

Technical Project Manager Ateknea Solutions Catalonia

Ateknea Solutions de un Vistazo

+100 Ingenieros +30 PhDs

Especialización en Innovación, Desarrollo e Investigación (I+D+i). Gestión de proyectos de innovación. Soluciones de ingeniería innovadoras. +15 años de experiencia.

Nº1 en propuestas financiadas por la Comisión Europea en el programa “Investigación en Beneficio para las PYMES” del Séptimo Programa Marco (FP7).

+218 proyectos +600 PYMES involucradas +25 países europeos representados.

Transformamos las ideas de nuestros clientes en soluciones comercializables.

Lo que hacemos:

Investigación e Ingeniería en diferentes sectores:

Electrónica Mecánica Software Sistemas

Eficiencia energética y Medio Ambiente

Industria competitiva y Fabricación

Retos ICT

Agricultura sostenible y seguridad alimentaria

Salud y Bienestar

Nuestras áreas de conocimiento:

VALORIZACIÓN DE RESIDUOS TRATAMIENTO DE AGUAS FISICA APLICADA ELECTRÓNICA VISIÓN ARTIFICIAL SISTEMAS MECÁNICOS DESARROLLO DE SENSORES ESPECÍFICOS DESARROLLO DE SOFTWARE INGENIERÍA DE PROCESOS Y CONTROL

ROBOTICA INTELIGENCIA ARTIFICIAL SISTEMAS DE COMUNICACIÓNES MÓVILES REDES DE SENSORES INALAMBRICOS SERVICIOS WEB AUTOMATIZACIÓN Y MECATRONICA CREACIÓN DE PROTOTIPOS

8th GEO European Projects Workshop Athens, 12-13 June 2014

This project has received funding from the European Union’s Seventh Framework Programme for research, technological development and demonstration under grant agreement no 308524 6 of 28

Most cities can only afford a small number of fixed measuring points. Advantages: Accurate data

Disadvantages: Limited coverage

CITI-SENSE | Fixed Units



CITI-SENSE | Mobile Sensors



CITI-SENSE | The Project

CITI-SENSE creates a distributed data collection network using innovative static, portable and personal devices (low-cost sensor packs) that communicate with a data repositories through mobile phones or other devices



CITI-SENSE | Sensor Suppliers

Sensirion, Honeywell Noise, T, RH, Testo CO2

Alphasense CO, NO, NO2, O3, CO2, PM2.5 Dylos, Sharp light scattering(almost PM2.5) SGX, Figaro Metal oxide sensors: NO2, O3 Obeo Radon



The working electrode either oxidises or reduces the target gas with the counter electrode balancing the generated current. If the working electrode oxidises the gas, then the counter electrode must reduce some other molecule to generate an equivalent current, in the opposite sense. For example, where carbon monoxide will be oxidised on the working electrode, oxygen will be reduced on the counter electrode The reference electrode anchors the working electrode at the correct potential to ensure that it stays in the transport limited current plateau of the current-voltage curve.

How Electrochemical Gas Sensors Work



The Zero Current Problem

Electrochemical amperometric gas sensors have a background current in addition to the current from oxidation or reduction of the sampled gas. This background current is commonly called the zero current These zero currents can be significant and can frustrate attempts to make measurements at low gas concentrations The offsets will be calibrated in mV because the measured signal was converted to mV through a trans-impedance amplifier.



Simple correction by subtraction (ambient temp)

Programming into your software the zero voltage of both the WE and AE as provided by Alphasense and include separately the electronic and sensor offsets, correcting only the sensor offset for temperature. For B4–type sensors the WE area is 1.16 times the area of the AE, hence it would be expected that the AE currents would have to be adjusted by a factor of 1.16

VWE - 1.16 VAE = 0



Simple correction by subtraction (ambient temp)

The adjustment will not be as simple as that because the structures of the electrodes are by no means planar.



Determine the temperature of operation, and from this temperature determine the correct value of n.

Correcting measurements

-30 -20 -10 0 10 20 30 400

1

2

3O3-B4 - Temp Compensation factor

-30 -20 -10 0 10 20 30 400

0.5

1NO2-B4 - Temp Compensation factor

-30 -20 -10 0 10 20 30 400

1

2

3

4CO-B4 - Temp Compensation factor



CITI-SENSE | Alphasense Sensors

Limit of Detection * (ppb) CO H2S NO NO2 O3 SO2

A series 20 5 80 15 5 15

B series 4 1 15 12 4 5




Long term stability (22 months)

Stability (% of original sensitivity) CO 63 to 89 NO 80 to 105 CO2 ND SO2 95 to 115 NO2 30 to 41 O3 63 to 91

VOCS To analyse PM2.5, PM10 To analyse




NO2 and O3

Two strongly oxidising, unstable gases at low concentrations. Although both cause oxidative stress in humans and should possibly be

considered together, we must separate them.

NO2: most selective, less stable O3: more stable, RH dependent

Alphasense is improving the catalysts



Static Units

Mobile Units

CITI-SENSE | Sensor Platform Providers



ekoBUS800 Gas sensors are Alphasense B4

family electrochemical types CO, NO, NO2, O3

OPC-N1 PM sensor

IRC-A1 for CO2 (Infrared) T+%RH is Sensiron SHT11. Air pressure sensor is

MPXA6115AC6U. Proprietary noise sensor

Measurements are transferred to the

back-end server via GPRS. USB port or RS232 port for

communications with PC

DunavNET’s Sensor Platform



A master node and slave nodes have been provided Alphasense AFE-A4 series SO2,

NO2, CO (ppb) VOC, PM2.5,10 Noise Meteo station – temperature,

humidity, pressure, direction and speed of wind

GPS module used for location information of every master node and built-in accelerometer.

GSM/GPRS module for GSM communication of master node with the central server

802.15.4 module for communication of master node with slave nodes

CVUT’s Sensor Platform



The current specifications of CanarIT AirBase’s platform are: CO2/O3, NO2, VOC, TSP [ppb] Temperature [°C] Relative Humidity [%] Noise.

Electrical specifications: Power: 12V DC

The device sends a packet of measurements data to the server every 20 seconds using a GPRS connection.

Airbase CanarIT



Alphasense AFE-A4 NO, NO2, O3, CO, CO2 [ppb]

Relative Humidity [%] Temperature [ºC] (of Pod) Pressure (mB) PM via OPC Noise

Data Communication via GPRS

Geotech AQMesh



OBEO provides an indoor radon sensor with GSM connectivity A silicon semi-conductor

detects Alpha Particles.

OBEO MMR



CITI-SENSE | Mobile Sensors



The Personal Sensor Unit developed by JSI is equipped with the following sensors: Alphasense AFE-A4 series NO2, O3,

CO, VOC (PID), [ppb] Temperature [°C] (Sensiron SHT75) Relative Humidity [%] (Sensiron

SHT75) Accelerometer (Freescale MMA8453Q)

Bluetooth 4.0

JSI’s Personal Sensor Unit



Alphasense A4 Series NO2, O3, CO (or NO) (ppb)

Temperature (°C) (Sensiron SHT75)

Relative Humidity (%) (Sensiron SHT75)

GPS and accelerometer information from smartphone

Bluetooth 2.0 USB connectivity

Ateknea’s Personal Sensor Pack



CITI-SENSE | Pilot Test Cities The involved cities have been gathering sensor-enabled data on outdoor urban spaces and indoor school environments. Nine different cities - Barcelona - Belgrade - Edinburgh - Haifa - Ljubljana - Oslo - Ostrava - Vienna - Vitoria



CITI-SENSE | Full Deployment

Location/Provider GEOTECH

(WP2) ATEKNEA

(WP2) ATMOS (WP3)

OBEO (Radon)

Barcelona (BCN) 25 + 5* 11 - - Belgrade (BEL) 25 11 12 4 Edinburg (EDI) 24 11 12 4 Haifa (HFA) 24 11 - - Ljubljana (LJU) 12 + 6* 11 12 4 Oslo (OSL) 24 11 12 4 Vienna (VIE) 24 11 - - Ostrava (OSR) 16 9 - -

Total 174 86 48 16 Total of 324 units

* From pilot, not accounted for total

Technical Project Manager

+34 932049922 x 517 Leonardo.santiago.atekena

[email protected]

Leonardo SANTIAGO

Thanks for your attention

Número de diapositiva 1Número de diapositiva 2Número de diapositiva 3Número de diapositiva 4Número de diapositiva 5CITI-SENSE | Fixed UnitsCITI-SENSE | Mobile SensorsCITI-SENSE | The ProjectCITI-SENSE | Sensor SuppliersHow Electrochemical Gas Sensors WorkThe Zero Current ProblemSimple correction by subtraction (ambient temp)Simple correction by subtraction (ambient temp)Correcting measurementsCITI-SENSE | Alphasense SensorsCITI-SENSE | Alphasense SensorsCITI-SENSE | Alphasense SensorsCITI-SENSE | Sensor Platform ProvidersDunavNET’s Sensor PlatformCVUT’s Sensor PlatformAirbase CanarITGeotech AQMeshOBEO MMRCITI-SENSE | Mobile SensorsJSI’s Personal Sensor UnitAteknea’s Personal Sensor PackCITI-SENSE | Pilot Test CitiesCITI-SENSE | Full DeploymentNúmero de diapositiva 29

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