A Length Measuring Method Based on Accelerometer

In recent years, industry of the pipeline has developed flourishing[1]. Pipeline leak detection methods positions accuracy can reach the distance between two welds adjacent. Positioning between the magnitude can be used to ascertain the leak point accuracy, which is an important area. Complicated environment in the ocean floor are obstacles to have the aid of other equipment. This article introduces a method which can measure the distance between two welds using a triaxial accelerometer aim at this circumstance. It integrates the components of the triaxial accelerometer to deduce the one-to-one correspondence relationship during the sphere inner detector rolling along in the pipe. According to this theory it introduces a method which multiply circumference of the ball by the cycle number to measure the distance. After laboratory and field experiments it indicates feasibility and the admissible error which is about 2%. It is of great significance on the submarine and land pipeline leak detection application.