Bridges and the associated technical areas are susceptible to the weather conditions in the Netherlands. This means temperatures that are high in summer and below freezing in winter. The consequences can sometimes cause major inconvenience. Therefore, bridges have to be cooled by the fire service or they are sometimes actually shortened by the Rijkswaterstaat in order to avoid problems in the summer. A critical fault in a spot with a high traffic volume involves high costs and dissatisfaction.
The Antea engineering firm was asked to perform temperature measurements during the summer in the technical areas and basements below a number of bridges. These measurements had to be carried out over a long period, be accurate, and have a high data density. A few measurements per day was therefore insufficient. After this measurement period the data had to be contextualised to allow conclusions to be drawn from them. Although the data did not have to be viewed in real time, there were nevertheless important requirements at the level of reliability, accuracy, and ease of acquisition.
Antea had already been using the wireless platform of Wireless Value for some time. This meant that an expansion using temperature sensors would suffice. Because real-time data was not a requirement, use of the buffer in the sensors was opted for. As a result of the long battery life and the large buffer all that was needed was to fit the sensors and remove them again after 3 months. The data were read automatically, and a large quantity of reliable information was delivered. This allowed Antea to provide the client with a substantiated and technically correct opinion.