Identification of moisture content in coal sample by using Ultrasonic NDT

Coal is an extremely complex material and exhibits a wide range of physical and chemical properties. The rapidly expanding use of coal made it necessary to devise acceptable methods for coal analysis with the goal of correlating composition and properties with behavior. As a part of the multifaceted program of coal evaluation, new methods are continually being developed and the already accepted methods may need regular modification to increase the accuracy of the technique as well as the precision of the results. The use of ultrasonic testing for material characterization not only play a important role in quality assurance during in-manufacture inspection but also can serve as a powerful tool for life prediction technology during in-service inspection, residual life assessment and plant life extension. The measurement of ultrasonic parameters has been used for determining material properties for many years, but with the advent of modern signal processing techniques it is possible to extract significantly more information from ultrasonic signals. In this paper an attempt is made to characterize the Moisture content in Coal Sample by ultrasonic Non destructive techniques by measuring various NDT parameters of Coal Sample such as, ultrasonic velocity, attenuation, etc.