NEW MAGNETIC LINEAR SENSOR FOR CRACK MONITORING IN STRUCTURES
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Abstract
Due to the recent deployment of new sensing technologies and monitoring devices aiming to control technical condition of structures and its safety, the problem of optimization of data acquisition process and economic expediency during Structural Health Monitoring has arisen. This article presents the design and implementation of a new linear displacement sensor prototype with advanced functionality capable to measure three significant parameters affecting the condition of concrete and brick structures: cracks width, environmental temperature and humidity. The measuring method is based on the efficient principle of converting input values using Hall effect, which is rarely found in structural monitoring. The sensor prototype also includes a hardware set for immediate processing and transmitting data, which ensures efficient remote monitoring. As a result of the work, research and analysis of methods and principles for measuring linear displacements were carried out, selection and justification of the choice of hardware components of the sensor were performed, electronic circuit and functional diagrams were developed. Furthermore, work was done on modeling the structural elements of the sensor and their final production was executed. According to the results of tests of the sensor prototype, numerical characteristics were obtained, its performance was confirmed and, eventually, the ways of further improvement are proposed.
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