Blog 2018-02-17T19:03:04+00:00

BLOG

1702, 2018

Sensors Calibration

From the UPCT, we have hardly worked in the calibration proccess of each sensor to achieve accurate information related to the quality air. This information follows the OMS regulations which analyze and measure gases such as CO2, CO, SO2, NOx and O3 in urban environments. However, the values captured by the sensor are not understanding theirselves; it is required to carry out a previous process. To this end, from decimal codification provided by Arduino resolution (between 0 and 1024) and for each collected measure, we must adjust this value to a specific voltage level. This voltage is that which the sensor really undergoes and, in turn, the resistance (Rs) associated to this level voltage is also calculated. As a second step, the sensor internal resistance (R0) must be derived; this parameter depends intrinsically on the manufacturer since is unique and characteristic for each sensor. To achieve the R0 value, concentration […]

1702, 2018

SECURITY FIRST

With the aim of guaranteeing security in the transmission and management of the information captured by the devices designed and implemented in the CAMoN project, the Cartagena team has created a VPN (Virtual Private Network) that connects the gateways to the Cartagena and Colombia servers in a safe way. This prevents access to important services outside the VPN. In addition, a firewall has been configured that limits access to these servers and their hosted databases. In this way, the security of our system is guaranteed, as well as the privacy of registered users.

1702, 2018

Design and Development of CAMoN Sensor Device (publisher)

In the framework of the CAMoN project, the Cartagena team has been in charge of the integration of commercial hardware components and software implementation in a compact device (prototype), which measuries the levels of pollution in the environment. This device has been named publisher.

To achieve this, the first task was to identify which resources are required by the system. This task is essential for the subsequent selection of the components of the device: battery, GPS receiver, sensors, display screen, etc. Additionally, our group has implemented other components, such as, for example, an on/off switch or a plate that accommodates and facilitates the placement of the sensors.

In the software part, the systems required for the proper functioning of the publisher have been installed, configured and developed: GPS configuration, routing protocol based on DTN (Delay Tolerant Network) technology, data sensor acquisition, etc. These systems provide the device with the ability to not […]

602, 2018

Design of the Network Topology of the Air Quality Monitoring Devices

One of the fundamental parts of the CAMoN project is the development of the prototype of air quality monitoring. In general terms, the design of the device comprises two parts: the network topology and the integration of the different sensors.

In this post we talk about the network topology, which is essential to have a flexible and efficient communication system that allows data to reach from the sensors to the OrganiCity servers.

For the network topology, several factors were taken into account, such as not depending on celular networks and ensuring maximum flexibility for the transmission of data. In this regard, to reduce costs, we chose the utilization of IEEE 802.11 network technologies and to deploy a delay tolerant ad-hoc mobile network. In this way, the ability of the nodes to self-organize in the transmission of data to the servers is guaranteed as well as in those moments in which some node […]

News

Co-Creation Group work

On March 5th, the CAMoN team in Colombia organized the event with one of the co-creation groups on the Santiago […]