[Product under development] Road Cat

The ROAD CAT daily inspection vehicle is equipped with the JI system (Joint Inspection System), which consists of a system that measures the health of the expansion joints from the sound generated when the vehicle passes over the expansion joints, and a system for identifying the site of deformation (J-D Answer system*2).

The system measures health from the sound passing through the expansion joints, using a compact microphone placed near the rear wheel tire (photo-4) to measure the sound passing through the expansion joints and the vibration acceleration of the vehicle with an instrument (photo-5). The collected data is compared with the data when healthy, and the change (difference) is analyzed to evaluate the soundness.

The JI system, uses multiple laser displacement transducers (Photo-6) to measure the amount of unevenness on the road surface in the order of 1/10000th of a second while traveling at about 80 km/h, and it is possible to accurately measure the deformed part of the expansion joints by comparing it with the timing at which vibration occurs.

*2 Generic name for systems jointly developed by NEXCO East Japan, Central Japan, West Japan, NEXCO Research Institute, and Kozo Keikaku Engineering Inc.

Japanese notation only

Easy to understand introduction of our products

Click here for details

Return to list