Development of a case for a wireless sensor for monitoring of reinforced concrete structures

Abstract

Enclosure design is the most important stage of product development. A proprietary enclosure has many advantages as well as disadvantages. The most important part of the design of an electronic device enclosure is the preliminary research stage. Each device has its own technological peculiarities, which are taken into account during the development of concepts. This article presents the peculiarities of the development of enclosure for wireless sensor for monitoring of reinforced concrete structures, discusses the important aspects of each stage.

On-site pilot testing of maturity sensors in conjunction with ambient condition monitoring device to get an insight into the concrete strength gain process

“…The obtained results clearly show how demonstratively the strength gain process can be presented and used when monitoring the concrete structures. Previous studies [5][6] somewhat have something similar, however the cross-correlation technique in this study seems easier to understand. Moreover, the non-volatile manner of proposed estimations may be straightforwardly integrated to a computer or mobile software for monitoring purposes.…”

“…This must be always set precisely to make fair assumptions on the effect of factors on the concrete strength. In the sensor devices developed during the studies of [6] and [7] the aspect of simultaneity is reached by setting a specific measurement interval programmed to their Arduino microcontrollers in advance. By this moment these sensor devices were tested only on small precast structures, and fulfilled the expectations.…”

Complex Maturity Method for Estimating the Concrete Strength Based on Curing Temperature, Ambient Temperature and Relative Humidity

“…The temperature sensors were inserted in the middle of the 2 cylindrical samples and 2 boxes and logged every 30 min for 28 days (Figure 1). Along with internal temperature, two more sensors were recording the ambient temperature and ambient relative humidity at the same time, by analogy with [23]. Compression tests were conducted with a TMC-3224 hydraulic compression testing machine, according to [13] for cylindrical and [14] for cubic samples, in order to determine their average value of strength on the 1st, 3rd, 7th, 14th and 28th days (Figure 2).…”