Method for determining direction of travel of a wave front and apparatus therefor

摘要

Direction of travel from a wave front in a pipeline is determined with two pressure sensors spaced relatively near to each other so that the site from which the wave front emanated is not located therebetween. For each sensor, a determination is made as to whether a detected signal has exceeded a negative or a positive threshold. In addition, the sensor outputs are subtracted from each other to determine which sensor detected the wave front first. Combining the resulting signals yields information on the nature of the wave front and its direction of travel.