Visual monitoring method on fresh concrete vibration

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Visual monitoring method on fresh concrete vibration

Tian, Zhenghong / Bian, Ce

Abstract An integrated visual monitoring system to determine trajectory and duration on each vibrating motion of vibrator during concrete placed on construction site was introduced, which could graphically display vibrating status of fresh concrete. Defects on concrete placing process such as missed vibration, insufficient vibration, or excess vibration could be quantifiably assessed, and therefore, precise and suitable remedy could be offered timely. The system consisted of four functional parts, namely, vibrating trajectory spatial coordinate collected subsystem, vibrating duration-collected subsystem, data process subsystem, and real-time display and assesses subsystem of vibrating status. The principle of operation was explained in this article. Firstly, accurate signals combined spatial coordinates were achieved by dual-satellite systems, e.g., GPS (Global Position System) and GLONASS (Global Navigation Satellite System), with RTK (Real Time Kinematics) mode and, duration of each vibration from start to end was determined by electrode device, respectively. Secondly, the wireless signals were sent to the terminal computer via MCC (Mono-Chip Computer) integrated. Finally, the worked status of vibrator on terminal was displayed simultaneously supported by assessment programm on compacting concrete. Tests results from outdoor and application in-situ proved that the system could monitor the vibration process in real-time reliably and quantifiably while fresh concrete was placed, and an innovative informationaized method might be realized.