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原文传递 INSTRUMENTATION FOR SURVEYING ACOUSTIC SIGNALS IN NATURAL GAS TRANSMISSION LINES

题名：	INSTRUMENTATION FOR SURVEYING ACOUSTIC SIGNALS IN NATURAL GAS TRANSMISSION LINES
作者：	Deepak Mehra;Richard Guiler;George M. Palmer;Gary J. Morris;John L. Loth;
关键词：	03 NATURAL GAS; 24 POWER TRANSMISSION AND DISTRIBUTION; 36 MATERIALS SCIENCE ; ACOUSTIC MONITORING; ACOUSTICS; COMPUTERS; DATA ACQUISITION; FREQUENCY RANGE; NATURAL GAS; PIPELINES; PLUMBING; POWER TRANSMISSION LINES; REMOTE CONTROL; STAINLESS STEELS; TANKS; TRANSDUCERS
摘要：	In the U.S. natural gas is distributed through more than one million miles of high-pressure transmission pipelines. If all leaks and infringements could be detected quickly, it would enhance safety and U.S. energy security. Only low frequency acoustic waves appear to be detectable over distances up to 60 km where pipeline shut-off valves provide access to the inside of the pipeline. This paper describes a Portable Acoustic Monitoring Package (PAMP) developed to record and identify acoustic signals characteristic of: leaks, pump noise, valve and flow metering noise, third party infringement, manual pipeline water and gas blow-off, etc. This PAMP consists of a stainless steel 1/2 inch NPT plumbing tree rated for use on 1000 psi pipelines. Its instrumentation is designed to measure acoustic waves over the entire frequency range from zero to 16,000 Hz by means of four instruments: (1) microphone, (2) 3-inch water full range differential pressure transducer with 0.1%of range sensitivity, (3) a novel 3 inch to 100 inch water range amplifier, using an accumulator with needle valve and (4) a line-pressure transducer. The weight of the PAMP complete with all accessories is 36 pounds. This includes a remote control battery/switch box assembly on a 25-foot extension chord, a laptop data acquisition computer on a field table and a sun shield.
报告类型：	科技报告