For the detection of cracks and corrosion in pipelines an ultrasonic measuring system (pig) was developed. During the pipeline inspection there is no communication to the outside world, the accumulated data have to be stored on a mass storage device.…
This work proposes a leak detection system using sonic technology, wavelet transform and neural networks to decompose and analyze pressure signals from oil pipelines in real time. The similarity between pressure and sound signals makes it possible to…
Ultrasonic gas flowmeters (UGFM) are extensively used in petroleum, chemical, natural gas and other fields because of their distinctive measurement advantages. As the core technology of the UGFM, digital signal processing technology determines its…
Multi-rate digital signal acquisition and processing technology is a general term that refers to changing the sampling rate of the signal through extraction or interpolation. In the acquisition and processing of a variety of digital signals such as…
This paper introduces a new method of video-compress based on MPEG-4. The coding algorithm adopts 3-D wavelet transformation and Shape Coding. In hardware implement, DSP chips and FPGA chips is adopted, FPGA completes the task of multiply clock…