The Study On Storage Tank Bottom Testing Technology

In recent decades, with the development of economy of China, the demanding for energy is also high growth. Especially in oil resources, China has become the world's second importing country after the U S A. In order to deal with the international price fluctuation and oil-producing areas of the war, China has started to build their own national petroleum reserve. Large storage tank is the main way of oil storage at present in China. Its security is a very serious problem. Including many countries, the large oil tanks have serviced for more than 10years. Storage tank bottom plate is the easiest corrosion leakage. Once it happens to spill, that will cause severe disaster and environmental pollution. So the detection instrument which is used in service of storage tank bottom.On petroleum storage tank bottom material characteristics, the paper creatively proposes a new way which uses multi-channel ultrasonic testing equipment to detect the storage tank bottom. It do the research of ultrasonic detection system, automatic walk caterpillar car, ultrasound three-point system, explosion-proof information transmission, ultrasonic signal high-speed data sampling system and data processing. Designed to the above all systems, and completed the simulation and production of ultrasound launch circuit, amplitude limit circuit, variable gain amplifier circuit, bandpass filter circuit. And do a lot of experiments about ultrasound, and propose the way how to judge defects. Do research in the wavelet analysis theory. Do wavelet de-noising processing of ultrasonic echo signal with wavelet toolbox main menu of MATLAB. An ideal ultrasound signal is obtainedWith the ultrasonic test system, it detect the thickness of CSK-1 of 25mm, 91mm, 100mm. The ability of ultrasonic test system is detected by recognition thickness. Do some experiments It used to detect the flaw of ?1 .5mm and 6mm deep of CSK-1. Through some experiments, the ultrasonic detection system is able to detect steel plate. And it can detect the bottom of oil storage tank and own good application value.