Development of multifunction international roughness index and profile measuring device

The development of a low cost multifunction measuring device is required for reduction of operation time and procedure in pavement quality inspection. This work aims to develop a multifunction international roughness index and profile measuring device. The developed device consists of hardware and software components. For the hardware components, open chain five bar linkage was designed for installation of variable resistors, encoder, angle sensor and interface card in order to measure road surface, traveling distance, slope of profile leveling and transfer measuring data, respectively. The software components consisted of IRI and profile computation programs created by LabVIEW program. The performance testing results exhibited a low average standard deviation of IRI and profile leveling measuring value. Thus, the developed device is suitable for measuring in the pavement quality inspection.