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| Number | Title | Issue Date |
| 8011227 | Detection of ingress of water in an intermediate layer using acoustic resonance technology An apparatus and a method for determining a moisture ingress in an insulating layer surrounding a pipe, the insulating layer being surrounded by a tubular jacket. The apparatus includes an acoustic transducer in communication with an exciter adapted to provide a bri... | 09/06/2011 |
| 7810378 | Monitoring of leakage in wastewater force mains and other pipes carrying fluid under pressure A method of detecting leakage in a force main involves placing at least two spaced sensors on the force main. Liquid is pumped through the pipe by means of a pump. The pump is shut down for an interval of time, and during the period following pump shutdown while neg... | 10/12/2010 |
| 7788967 | Method and apparatus for leak detection Methods and apparatuses are disclosed for detecting small leaks in double wall containers using enhanced tracer dispersal and detection techniques. More specifically, economical, substantially closed leak detection apparatuses, methods and systems are disclosed that... | 09/07/2010 |
| 7730768 | System and method for controlling emission of acoustic energy for detecting leaks in vehicles A system for detecting leaks in vehicles comprises memory, a plurality of transducers, at least one sensor, an input device, and logic. The memory stores a plurality of transmit profiles. The transducers are disposed in a vehicle and configured to emit acoustic ener... | 06/08/2010 |
| 7540183 | Methodology of monitoring a device to ascertain gas leakage therefrom Provided is a method of monitoring a device to ascertain leakage of the gas there from. An area in the vicinity of the gas is illuminated with ultraviolet light, thereby causing the gas or its residue to fluoresce. A gas sensor is exposed to the gas whereby it gener... | 06/02/2009 |
| 7401500 | Positive displacement pump monitor A positive displacement pump monitor. The monitor includes a sensor coupled to a housing of a pump for obtaining acoustic data therefrom. A proximity switch may be simultaneously used to keep real time timing information relative to the cycling of the pump. A data p... | 07/22/2008 |
| 7331215 | Deployment of equipment into fluid containers and conduits Apparatus for deploying equipment in a fluid container or fluid conduit comprises a fluid housing having an outlet aperture, the fluid housing being adapted to be secured to the container or conduit such that the outlet aperture is in fluid communication with an ape... | 02/19/2008 |
| 7266992 | Remote pipeline acoustic inspection A pipe inspection apparatus comprising an acoustic source (3) for location at a first position in a pipe or pipe network, one or more acoustic or pressure detectors (4) for location at one or more positions in the pipe or pipe network, means for record... | 09/11/2007 |
| 7051577 | Multi-functional leak detection instrument along with sensor mounting assembly and methodology utilizing the same A leak detection instrument may comprise a housing, a gas sensor supported relative to the housing, an AE sensor for generating a sound detection input signal upon exposure to gas leakage, processing circuitry for producing output signals, and an output device. The ... | 05/30/2006 |
| 7007545 | Method and measurement probe for the performance of measurements in water supply systems Measuring elements for the output of measured quantities in respect of the flow, namely the flow quantity and direction, the water pressure and the flow noise are integrated in a measurement probe (1) for water supply networks (13), whereby all these m... | 03/07/2006 |
| 6983642 | System and method for automatically judging the sealing effectiveness of a sealed compartment An improved and non-destructive test method and system utilizes ultrasound wave energy to automatically judge the sealing effectiveness of a sealed compartment such as the cabin of a motor vehicle or aircraft. An ultrasonic transmitter generates ultrasound energy of... | 01/10/2006 |
| 6804992 | System and method for processing ultrasonic signals A system and method for eliminating confusion associated with checking valves, wherein additional test points are added to the measurement of a valve for ensuring the verification of the actual sources of leaks or turbulence. A base line measurement for the valve is... | 10/19/2004 |
| 6789411 | Detecting leaks in pipes An apparatus for permanently or semi-permanently fitting to an underground water pipe 15,16 for detecting leaks therein, comprises a hydrophone 26 mounted to acoustically monitor water flowing along the pipe 15,16 and means 29 for analyzi... | 09/14/2004 |
| 6725705 | Enhanced acoustic detection of gas leaks in underground gas pipelines A method for locating gas leaks from underground gas pipelines in which a first acoustic sensor having a first signal output is positioned in ground disposed substantially above or at a distance from the underground gas pipeline. At least one second acoustic sensor ... | 04/27/2004 |
| 6684702 | Method of detection of flow duct obstruction A method for detecting an obstruction in a flow duct is provided. The method includes the steps of directing gas through at least one port of the flow duct, measuring a flow noise level of the gas directed through the at least one port, and comparing the ... | 02/03/2004 |
| 6668619 | Pattern matching for real time leak detection and location in pipelines A method and apparatus is provided for detecting and locating leaks in a pipeline. Pattern match filtering is used to reduce false alarm rate, increase sensitivity and improve leak location accuracy, while quickly detecting leaks by the acoustic signal ge... | 12/30/2003 |
| 6666070 | Method for testing the integrity of DPFs A method for inspecting the integrity of diesel exhaust filter by introducing air under pressure through one end of the structure and detecting the presence of air flow at an opposing end surface. The diesel exhaust filter is tested green.... | 12/23/2003 |
| 6647762 | Detecting leaks in pipes An apparatus for permanently or semi-permanently fitting to an underground water pipe 15, 16 for detecting leaks therein, comprises a hydrophone 26 mounted to acoustically monitor water flowing along the pipe 15, 16 and means 29 for analysing a parameter ... | 11/18/2003 |
| 6614354 | In-ground pipeline monitoring A method for monitoring an in-ground pipeline by detecting an occurrence of a contact with an in-ground pipeline via an acoustic sensor employing a first selected detection parameter and a second sensor employing a second selected detection parameter, whi... | 09/02/2003 |
| 6595059 | Noninvasive detection of corrosion, MIC, and foreign objects in fluid-filled pipes using leaky guided ultrasonic waves Ultrasonic energy in the form of guided waves is launched into the wall of a fluid-filled container. The guided wave propagates around the circumference of the container from a transmitting transducer to a receiving transducer. Part of the guide wave ener... | 07/22/2003 |
| 6595038 | Apparatus for determining the position of a signal from a pipe An apparatus for determining the position of a signal from a pipe, the apparatus comprising a first sensor capable of being coupled to the pipe for detecting a signal from the pipe, a second sensor being moveable with respect to the pipe for detecting a s... | 07/22/2003 |
| 6567006 | Monitoring vibrations in a pipeline network The invention relates to acoustic detection of leaks in a pipeline using locally-intelligent, data-adaptive monitors deployed for a period of time. Monitors are initialized by a base station. Following deployment, monitors receive vibration signals at pro... | 05/20/2003 |
| 6553809 | Method and apparatus for detecting holes in plastic containers The invention relates to a method and apparatus for monitoring the production of blow molded plastic containers. It has been discovered that by sonically monitoring the production of a plastic blow molded container, the occurrence of a hole in the wall of... | 04/29/2003 |
| 6530263 | Method and system for localizing and correlating leaks in fluid conveying conduits A system for localizing and correlating leaks in a pipeline includes a plurality of loggers for detecting and storing sound data, an interface unit removably connected to the plurality of loggers and a computer system removably connected to the interface ... | 03/11/2003 |
| 6453247 | PC multimedia-based leak detection system for water transmission and distribution pipes This invention pertains to the detection of leaks in plastic water distribution pipes by processing the sound or vibration induced in the pipe by water escaping under pressure. Acoustic leak signals are measured at two (or more) contact points with the pi... | 09/17/2002 |
| 6442999 | Leak locator for pipe systems A system and method for determining a time of occurrence of a pressure wave in a pipe provides a first sonic transducer and a second sonic transducer at each of a plurality of site locations along a pipe. Sonic waves are generated through a pipewall at a ... | 09/03/2002 |
| 6430988 | Ultrasonic leakage inspection device of non-pressure type Leakage inspection of items, such as vessels and pipings, is performed using an ultrasonic wave under no pressure with a device of simple structure. The ultrasonic leakage inspection device according to the present invention comprises an ultrasonic wave e... | 08/13/2002 |
| 6404343 | Water leakage monitoring apparatus A water leakage detecting apparatus is capable of detecting water leakage of a water pipe precisely and at low cost. The water leakage monitoring apparatus includes vibration/electric converter for converting an acoustic vibration transmitted to a water p... | 06/11/2002 |
| 6389881 | Method and apparatus for pattern match filtering for real time acoustic pipeline leak detection and location A method and apparatus is provided for detecting and locating leaks in a pipeline. Pattern match filtering is used to reduce false alarm rate, increase sensitivity and improve leak location accuracy, while quickly detecting leaks by the acoustic signal ge... | 05/21/2002 |
| 6370943 | Process for monitoring the integrity of hollow fiber filtration modules A process is disclosed for monitoring the integrity of hollow fiber filtration modules and for detecting leaks of treated liquid through a fiber completely or partially broken. It operates continuously and in filtration mode, without production shutdown. ... | 04/16/2002 |
| 6327896 | Photo-acoustic leak detection system The present invention is a photo-acoustic leak detection system that detects whether gas is leaking from a component. The system includes multiple beams wherein one beam is not absorbed by the gas and is used as a baseline measurement, while another beam ... | 12/11/2001 |
| 6289723 | Detecting seal leaks in installed valves An apparatus is disclosed for detecting a leak in a valve and the magnitude of the leak. The valve has an upstream seal, a downstream seal and an inner cavity isolated by the seals. The apparatus comprises a mechanism for generating random pressure pulses... | 09/18/2001 |
| 6247353 | Digital ultrasonic monitoring system and method A portable digital ultrasonic monitoring system and method for use by an operator in detecting the ultrasonic waves and temperature variations produced by sources such as leaks in pipes, arcing, electrical corona and machinery defects is provided. The dig... | 06/19/2001 |
| 6244100 | Temperature compensation for automated leak detection An apparatus for detecting a leak in an isolated segment of a pipe with a known fluid: The apparatus includes a mechanism for producing a pressure pulse in the pipe. The producing mechanism is adapted for connection to the pipe. The apparatus includes a m... | 06/12/2001 |
| 6227036 | Multiple microphone photoacoustic leak detection and localization system and method A method and system for multiple microphone photoacoustic leak detection and localization. The leak detection technique uses photoacoustic sounds produced by the interaction of a carbon dioxide (CO2) laser turned to 10.6 microns and a photoactive tracer g... | 05/08/2001 |
| 6220098 | Multiple sensor ultrasonic monitoring device An ultrasonic monitoring apparatus is provided for use by an operator in detecting ultrasonic vibrations and sound waves. The ultrasonic monitoring apparatus consists of a hand held device with a sensor socket that allows a variety of different types of s... | 04/24/2001 |
| 6216539 | Equipment setup for ultrasonic monitoring An apparatus and method determines ultrasonic measurement parameters of ultrasonic measurements to be performed on a mechanical system, where the ultrasonic measurements are performed using a portable ultrasonic measurement device. The ultrasonic measurem... | 04/17/2001 |
| 6212942 | Leakage inspection method and apparatus A leakage inspection method and apparatus having a pressure wave generating means, including an air supply source, a regulator, and a solenoid valve. A pressure wave of a fluid is applied to a normal flow path of an measurement object by the pressure wave... | 04/10/2001 |
| 6138512 | Method and apparatus for determining source location of energy carried in the form of propagating waves through a conducting medium A method and apparatus for determining source location for acoustic or other waveform energy in a conducting medium. The method includes simultaneously detecting and transducing the source energy at a plurality of points in the medium into a composite sig... | 10/31/2000 |
| 6134949 | Method and apparatus for on-line detection of leaky emergency shut down or other valves A method and apparatus for on-line detection of leaky emergency shutdown or other valves in a fluid transport system having an upstream pipe, a downstream pipe and the valve connected between the upstream pipe and the downstream pipe for controlling fluid... | 10/24/2000 |
