Fissurômetro Digital: construção de um hardware para uma proposta de baixo custo

Abstract

Ineffective crack monitoring can make it difficult to properly diagnose and maintain a building’s structure, potentially leading to collapses. The diagnosis is based on the progression of the fissure and must be monitored periodically. The more frequently measurements are taken, the sooner it will be possible to identify risks of collapses. The equipment used to measure cracks is the crack meter, and this is subdivided into two types: traditional and digital. The traditional crack meter is low cost, but the measurement must be carried out on site by a professional. The digital crack meter is expensive and performs measurements automatically, however, the data is stored in the equipment and requires someone to collect the data on site. Commercially, we have not found a model that provides remote monitoring 24 hours a day. The Oficinas 4.0 project (public notice SETEC/MEC 67/2021) proposed the development of a low-cost digital crack meter, with remote data transmission. This work is part of the development carried out during the Oficinas 4.0 project with regard to the novelty search, sensor development with Geogebra simulation, 3D modeling, mechanical manufacturing of the prototype and a brief comparison between the prices of commercials crack gauge. We designed, simulated and manufactured a low-cost displacement sensor based on a mechanical assembly coupled to a resistive sensor using a 3D printer. We assembled a fully functional prototype. In the novelty search, we checked the state of the art of equipment that performs functions similar to that proposed in this work.