Marine Innovations
In extending its adherence to delivering cost-efficient and safety driven technologies, DNV has introduced a new means of quickly and accurately determining steel thickness can speed ship surveys. It is especially valuable in inspecting old and corroded steelwork. Present-day methods, based on ultrasonic thickness measurements, are said to have dubious reliability on heavily corroded plates, and for large vessels are also considered too slow. The basic technological challenge was to transmit 100 percent of the signal energy through corroded steel plates, and receive and interpret the reflected signal to give an accurate thickness measurement. The basic principles of the new measuring method (half-wave resonance) have been known for 40 years.
New Steel-Thickness Measurement Promises Faster Surveys
Based on half-wave resonance measurements, a new means of quickly and accurately determining steel thickness can speed ship surveys. It is especially valuable in inspecting old and corroded steelwork. The new DNV system, launched at Nor-Shipping '99 is unique. Present-day methods, based on ultrasonic thickness measurements, are not reliable on heavily corroded plates, and for large vessels are also considered too slow. The basic technological challenge was to transmit 100 percent of the signal energy through corroded steel plates, and receive and interpret the reflected signal to give an accurate thickness measurement. The basic principles of the new measuring method (half-wave resonance) have been known for 40 years.
New Steel-Thickness Measurement Promises Faster Surveys
Based on half-wave resonance measurements, a quick, accurate means of determining steel thickness can speed ship surveys. It is especially valuable in inspecting old and corroded steelwork. Present-day methods, based on ultrasonic thickness measurements, are not reliable on heavily corroded plates, and for large vessels are also considered too slow. A new Det Norske Veritas (DNV) system addresses the technological challenge of transmitting 100 percent of the signal energy through corroded steel plates, and receiving and interpreting the reflected signal to give an accurate thickness measurement. The basic principles of the new measuring method (half-wave resonance) have been known for 40 years.
