University of Twente Student Theses


Developing a sensor network for real time temperature monitoring in Enschede

Onderwater, T.C. (2018) Developing a sensor network for real time temperature monitoring in Enschede.

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Abstract:To gain better insight in the urban heat island effect and for policy reasons a temperature network has been developed around the city of Enschede that should remain operational for at least one year. This network consists out of six temperature probes placed strategically around the city. To develop these probes an iterative design cycle has been used in conjunction with rapid prototyping. Generations were built in in quick succession and put to the test in conditions representing real operation circumstances. A number of requirements and challenges were set up and tests were created so operation of a single sensor node could be confirmed. A waterproof housing was designed to house the electronics and a heat shield to protect the sensor. The sensor nodes are built around the Sodaq ONE development board which incorporates both LoRa, a long range communication protocol and GPS whilst allowing multiple different sensor types to be connected to it. TTN was used as LoRa platform since it allowed multiple connections to be made and it provided good coverage of Enschede. To measure the temperature a digital temperature sensor has been used; the DS18B20 which has been calibrated to get temperature readings that are as accurate as possible. The sensor nodes are able to stay operational for at least one year by having a solar panel incorporated in the design which is able to produce charge at medium light conditions. With the use of the iterative design method all needed challenges could be tested for and the long term operation of the sensor node is better known than would otherwise be possible due to the numerous tests conducted. The housing went through 2 major iterations which were enough to guarantee the waterproofness of the design. The design of the whole project was with future development in mind, allowing the project to go a number of different routes in the future.
Item Type:Essay (Bachelor)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:50 technical science in general
Programme:Creative Technology BSc (50447)
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