acoustic measuring pipe

acoustic measuring pipe

US6003376A - Acoustic system for measuring the location ...

An acoustic method and apparatus for measuring the horizontal surface location and depth of any type of underground pipe or conduit, including nonmetallic or nonconductive pipe, such as sewer, gas, and water pipes, which cannot be detected with electromagnetic locators.

Acoustic resonance - Wikipedia

Acoustic resonance is an important consideration for instrument builders, as most acoustic instruments use resonators, such as the strings and body of a violin, the length of tube in a flute, and the shape of a drum membrane. Acoustic resonance is also important for hearing.Vibrating string·

WO2003040718A1 - Fluid density measurement in pipes …

The method of claim 10 wherein said measuring steps (a) and (b) comprise measuring a propagation velocity of a one-dimensional acoustic pressure wave traveling along said pipe. 13. The method of claim 10 wherein said step of measuring said first and said second effective system sound speeds comprises measuring a strain of the pipe.

A novel sensor for measuring the acoustic pressure in ...

The proposed sensor is a promising alternative to a conventional hydrophone for measuring the acoustic pressure in a buried water pipe, although some considerable development work is required before it could be used in the field.[PDF]

Acoustic Sensor for Pipeline Monitoring Revised

We also explored a novel approach for measuring flow ofgas inside a pipe using an acoustic technique.This used a simple hollow piezoelectric cylinder to produce a …[PDF]

Acoustic Systems for the Measurement of Streamflow

measuring devices. Acoustic velocity meter (AVM) devel­ opment for the measurement of streamflow is an off­ shoot of pipeline flowmeter development. Abstract The acoustic velocity meter (AVM), also referred to as an ultrasonic flowmeter, has been an operational tool for the measurement of streamflow since 1965.[PDF]

Electronic-Acoustic Instruments for Measuring Pipe …

The acoustic r adiator and receiver can be str ucturally combined. An acoustic pulse , produced by the generator 1 and the radi-ator 3, on command from the control unit 6, propagates along the pipe and is reflected from the open end, radiating part of

Soundproofing and Noise Control | Acoustical Solutions

Acoustical Solutions is a supplier of acoustic panels, soundproofing, sound blocking and noise control solutions for use in all types of applications.

Acoustic system for measuring the location and depth of ...

Dec 21, 1999· An acoustic method and apparatus for measuring the horizontal surface location and depth of any type of underground pipe or conduit, including nonmetallic or nonconductive pipe, such as sewer, gas, and water pipes, which cannot be detected with electromagnetic locators.Authors: Alan A Burns · Gary A Hayter · Stephanie A Griffin · Joseph W MarescaAffiliation: Americorps Vista

Measuring particle concentration in multiphase pipe flow ...

A technique that is an extension of an earlier approach for marine sediments is presented for determining the acoustic attenuation and backscattering coefficients of suspensions of particles of arbitrary materials of general engineering interest. It is necessary to know these coefficients (published values of which exist for quartz sand only) in order to implement an ultrasonic dual-frequency ...

Measuring particle concentration in multiphase pipe flow ...

A technique that is an extension of an earlier approach for marine sediments is presented for determining the acoustic attenuation and backscattering coefficients of suspensions of particles of arbitrary materials of general engineering interest. It is necessary to know these coefficients (published values of which exist for quartz sand only) in order to implement an ultrasonic dual-frequency ...

Measuring the Level of Liquid in a Partially-Filled Pipe ...

Measuring the Level of Liquid in a Partially-Filled Pipe Via the Ultrasonic Pulse-Echo Method Using Acoustic Modeling Abstract: A method for measuring the level of liquid in horizontally oriented pipes was designed, developed and tested.

Acoustics and noise insulation - expert acoustic advice.

Measuring = knowing Acoustic measurement at location. We assess the noise problem in your company during an acoustic investigation. Our acoustic specialist provides a targeted advice on the possible solutions. You receive a complete, specific quotation including assembly.

ePulse® Pipeline Leak Detection & Assessment | Echologics

By measuring the stiffness using this acoustic method, the average structural wall thickness can be calculated. ... When determining which pipe condition assessment technology to use, stakeholders need to consider a number of factors, including cost, convenience and accuracy. ... Echologics’ ePulse® acoustic condition assessment technology ...

Measuring particle concentration in multiphase pipe flow ...

To demonstrate the efficacy of the given method for the determination of the acoustic coefficients K h and ξ h, a series of measurements were completed in the pipe-flow loop to observe the settling behavior of flowing suspensions.

Industrial Insulation Products

pipe • thermal • removable blanket • solar • acoustic • heat cable Certified by the National Institute for the Uniform Licensing of Power Engineers Thermal/Pipe Insulation, -300º to +2300ºF

CiDRA Holdings LLC • Intellectual Property

Piezocable based sensor for measuring unsteady pressures inside a pipe: 7,322,245: 01/29/08: Apparatus and method for measuring a fluid flowing in a pipe using acoustic pressures: 7,322,251: 01/29/08: Method and apparatus for measuring a parameter of a high temperature fluid within a pipe using an array of piezoelectric based flow sensors ...

The acoustic ranger, a new instrument for tube and pipe ...

Blockages may be detected in pipes by sending acoustic signals down the pipe and measuring the echo from the blockage. This presents a fast and efficient way of determining the presence of a ...[PDF]

Acoustic impedance measurements—correction for …

When a sound wave enters a pipe from a pipe of smaller diameter, localized modes are generated close to the inlet wall in the larger pipe. The effect in the smaller duct can be neglected here, since the injected acoustic flow is assumed to be constant across its whole area in impedance measuring devices.Published in: Journal of the Acoustical Society of America · 2005Authors: Neville H Fletcher · John Smith · Alex Z Tarnopolsky · Joe WolfeAbout: Geometry · Acoustic resonance · Acoustic impedance · Focused Impedance Measure…

US Patent for Acoustic pipe length measuring apparatus ...

patents.justia› Distance Or Direction FindingAn acoustic pipe length measuring apparatus for measuring the length of a pipe-like member in accordance with the time between the emission of a pulse-like sound wave from a speaker at one end thereof and the collection of sound waves reflected at the other end thereof, by a microphone, and a sonic velocity, in which data of a sonic velocity at a reference temperature of a gas present in the ...

Acoustic impedance - Wikipedia

Acoustic impedance and specific acoustic impedance are measures of the opposition that a system presents to the acoustic flow resulting of an acoustic pressure applied to the system. The SI unit of acoustic impedance is the pascal second per cubic metre (Pa·s/m 3) or the rayl per square metre (rayl/m 2), while that of specific acoustic impedance is the pascal second per metre (Pa·s/m) or the ...Mathematical definitions·

Acoustic pipe length measuring apparatus - Free Patents …

Mar 16, 1993· 4. An acoustic pipe length measuring apparatus as set forth in claim 1, wherein a display unit for indicating the length to the pipe-like member obtained by said calculating means is provided. 5. An acoustic pipe length measuring apparatus as set forth in claim 1, where said reference temperature is 0° C. 6.Published in: Journal of the Acoustical Society of America · 1993Authors: Nakamura Hiroshi · Itoh Takanori · Natori MasakiAffiliation: Tokyo Gas

What is acoustic impedance? - University of New South Wales

The specific acoustic impedance z is a ratio of acoustic pressure to specific flow, which is the same as flow per unit area, or flow velocity. In all cases, 'acoustic' refers to the oscillating component. With this proviso, we can say that acoustic impedance Z = pressure/flow and specific acoustic impedance z = pressure/velocity.

Electronic-Acoustic Instruments for Measuring Pipe …

Block diagrams of electronic-acoustic instruments for measuring pipe lengths when there is only access from one end are considered. The principle of operation is based on determining the time taken for an acoustic pulse to propagate along the pipe, on being reflected from the open end.Published in: Measurement Techniques · 2002Authors: I Yu Zhiganov · B V Skvortsov · S G Sinnikov

Get In Touch24/7 Support

ADD : XICHENG SCIENCE & TECHNOLOGY BUILDING HIGH-TECH DEVELOPMENT ZONE, ZHENGZHOU, CHINA

TEL : 0086-371-86151827

FAX : 0086-371-86011881