Abstract: A control system uses a modeled steam turbine megawatt (power) change attributed to a gas turbine demand change (i.e., a steam turbine to gas turbine transfer function) within a conventional closed loop feedback control scheme to perform control of a combined cycle power plant. This control system implements a form of internal model control and provides better unit megawatt (power) set-point tracking and disturbance variable rejection for overall more robust control, and thus operates to optimize the gas turbine operation of the combined cycle power plant in a manner that provides cost savings over time.

Abstract: A measurement terminals include: a sensor that measures pipe vibration in a pipe; a measurement information acquisition unit that acquires measurement position information and measurement time information; a transmitter that transmits the pipe vibration, the measurement position information and the measurement time information to an analyzer; a receiver that receives an analysis result from the analyzer; and an output unit that outputs the analysis result from the analyzer.

Abstract: A leak detection device is provided which comprises: in order to suppress effects of extraneous vibration and improve accuracy of leak detection, a first detection unit (6) which detects vibration in a first direction and output a first signal S1 representing a magnitude of the vibration in the first direction, the first detection unit (6) being installed to a pipe (2) in which fluid (5) flows; a second detection unit (7) which detects vibration in a second direction different from the first direction and output a second signal S2 representing a magnitude of the vibration in the second direction, the second detection unit (7) being installed to the pipe (2); and a signal processing unit (10) which performs an arithmetic operation processing using the first signal S1 and the second signal S2.

Abstract: An abnormality diagnosis device introduces a pressure into a reference-pressure detecting portion by utilizing a pressure introducing portion to detect a reference pressure correlative to a reference orifice, detects a purge-valve closed pressure that is a pressure in an evaporation system of when a pressure is introduced into the evaporation system by the pressure introducing portion after the purge valve is controlled to be closed, and detects a purge-valve open pressure that is a pressure in the evaporation system of when a pressure is introduced into the evaporation system by the pressure introducing portion after the purge valve is controlled to be open. The abnormality diagnosis device determines whether a leakage abnormality of the evaporation system and a fixed open abnormality are generated, based on a magnitude relation between the reference pressure, the purge-valve closed pressure, and the purge-valve open pressure.

Abstract: A fire hydrant water leak and theft detection system is connected to a dry barrel fire hydrant. The detector is connected to the upper barrel portion of the fire hydrant below the nozzle assembly and includes a pair of electrodes. A signal is generated when water in the upper barrel portion closes an electrical circuit between the two electrodes due to the conductivity of the water between the electrodes. The detection system sends a signal to a network system upon detection of water in the barrel portion and relays to remote monitoring locations.

Abstract: The present invention discloses a method of cumulative helium mass spectrometric combination test by using argon gas as gross-leak tracer gas, and specifically gives the procedure for this gross-leak and fine-leak combination test, comprising steps and methods of selecting helium-argon prefilling method or helium-argon pressuring method, fixed or flexible scheme and the criterion RAr0max for argon measured leak rate of gross-leak test according to the rigour grade THemin, cavity volume, leak rate of surficially absorbed helium and argon and the history of the test of a component under test; designing time for pressuring of helium-argon pressuring method, the maximum test-waiting time of fine-leak test and the criterion for helium measured leak rate, helium-argon prefilling and helium-argon pressuring, removing absorbed helium and argon gas, gross-leak test, fine-leak test and complementally testing bigger gross leak, which enhances the sensitivity of gross-leak test, lengthens the maximum test-waiting time of

Abstract: A method of storage tank monitoring including calculating liquid inventory within the storage tank. Real-time parameters associated with evaporative loss of a liquid stored within the storage tank are determined to produce input data. The real-time parameters include at least one condition within the storage tank and at least one environmental condition. Evaporative loss is automatically calculated with an inventory calculation algorithm using the input data and at least one known physical property of the liquid in the storage tank.

Abstract: Technical solutions are described for forecasting leaks in a pipeline network. An example method includes identifying a subsystem in the pipeline network that includes a first station. The method also includes accessing historical temporal sensor measurements of the stations. The method also includes generating a prediction model for the first station that predicts a pressure measurement at the first station based on the historical temporal sensor measurements at each station in the subsystem. The method also includes predicting a series of pressure measurements at the first station based on the historical temporal sensor measurements. The method also includes determining a series of deviations between the series of pressure measurements and historical pressure measurements of the first station and identifying a threshold value from the series of deviations, where a pressure measurement at the first station above or below the threshold value is indicative of a leak in the subsystem.

Abstract: The invention provides a passive fluidics circuit for directing different fluids to a common volume, such as a reaction chamber or flow cell, without intermixing or cross contamination. The direction and rate of flow through junctions, nodes and passages of the fluidics circuit are controlled by the states of upstream valves (e.g. opened or closed), differential fluid pressures at circuit inlets or upstream reservoirs, flow path resistances, and the like. Free diffusion or leakage of fluids from unselected inlets into the common outlet or other inlets at junctions or nodes is prevented by the flow of the selected inlet fluid, a portion of which sweeps by the inlets of unselected fluids and exits the fluidics circuit by waste ports, thereby creating a barrier against undesired intermixing with the outlet flow through leakage or diffusion. The invention is particularly advantageous in apparatus for performing sensitive multistep reactions, such as pH-based DNA sequencing reactions.

Abstract: A method and apparatus for estimating a wave velocity of negative pressure wave in a fluid transportation pipeline. The method including: receiving a plurality of pressure signals from a plurality of sensors; determining time differences produced by the negative pressure wave reaching the adjacent sensors based on the received pressure signals; determining a wave source sensor segment where a wave source of the negative pressure wave is located; and estimating the wave velocities of the negative pressure wave in a non-wave source sensor segment and the wave source sensor segment.

Abstract: A component of a well system can be tested by pressurizing the component of the well system a test pressure via two supply lines connected to the component of the well system, e.g. a choke line and a kill line. Then, a first of the two supply lines can be isolated from the second supply line and the component of the well system. The change in pressure can be measured in the first supply line and the change in pressure can be independently measured in the second supply line and the component of the well system. The change in pressure of the first supply line can be subtracted from the change in pressure of the second supply line and the component. Then, the change in pressure for the component can be analyzed to determine if the component of the well system is maintaining pressure integrity, i.e. leaking or not leaking.

Abstract: The internal state of a tube system is detected and monitored by coupling multiple inspection modules to the tube system. Each inspection module injects a signal into the tube system and detects reflections of the signals. The distance between the module and the fault causing a reflection is determined by analyzing the timing between the transmitted signal and detected reflection, along with a known propagation speed of the signals. The location of faults is determined by comparing the distance calculations from two or more inspection modules. Monitoring can be performed over time to identify the development or changes of faults. Monitoring can be done while tube system is active without disrupting the flow of material through the active tube system.

Abstract: A valve assembly may be configured to perform a valve proving test as part of an operational cycle of a combustion appliance coupled to the valve assembly. The valve assembly may include a valve body having a fluid path, first and second valve sealing members translatable between an opened position and a closed position, and one or more pressure sensors in fluid communication with an intermediate volume of the fluid path between the first and second valve sealing members. A valve controller may be in communication with the pressure sensor and may monitor a measure related to a pressure change rate in the intermediate volume. The valve controller may then output a signal if the measure related to a pressure change rate in the intermediate volume meets and/or exceeds a threshold value.

Abstract: A method for detecting a leak in a fluid conducting conduit is disclosed. Inlet and outlet flowrates are measured for calculating a time derivative of average temperature of the fluid flowing in the fluid conducting conduit. A predicted difference in flowrate between a flowrate of fluid in the fluid conducting conduit adjacent the inlet and a flowrate of fluid in the fluid conducting conduit adjacent the outlet is calculated based on the calculated time derivative of the average temperature of the fluid flowing in the fluid conducting conduit. The predicted difference in flowrate is compared to a difference between the measured inlet flowrate and the measured outlet flowrate to determine whether a leak exists in the fluid conducting conduit.

Abstract: A leak detection system and method are characterized by scanning a surface of a vacuum package, generating a contour signal corresponding with the contour of the scanned surface, and comparing the contour signal with a stored contour signal of a similar package which is known to be free of leaks. The system includes a sensor such as a scanning device which scans a surface of the package and generates the contour signal. A signal processor connected with the scanning device processes the signal to generate a profile of the package surface. This profile is compared with a stored profile corresponding to a normal configuration for the package surface. When the scanned profile deviates from the stored profile, a leak within the scanned package is indicated.

Abstract: A method checks the gas tightness of a fuel cell system which has a fuel cell and a container for storing hydrogen gas. The container is connected to the fuel cell via a line along which a pressure sensor is arranged to measure a pressure of hydrogen gas flowing to the fuel cell. A quantity of hydrogen gas flowing to the fuel cell is calculated by a quantity/pressure relationship which describes a relationship between the pressure and the quantity of hydrogen gas. A current which is generated by the fuel cell is measured and a quantity of hydrogen gas which has been converted into electricity by the fuel cell is calculated by a quantity/current relationship which describes a relationship between the current generated by the fuel cell and the quantity of burnt hydrogen gas. The calculated quantities of hydrogen gas are compared with one another.

Abstract: A method of modeling a segment of a pipeline transporting a product comprising defining within the segment a plurality of discrete cells, each disposed between knots, preparing a system of equations relating the conservations of mass, momentum and energy for each cell along with equations for the liquid phase flow area of cells with tight, slack and minimum area flow modes, providing data relating to the product and the location and elevation of the cells, sensing a plurality of conditions within known cells, solving the system of equations, initiating a re-stepping process by re-assessing the flow modes of each cell and re-setting flow modes for cells with unstable flow modes, and re-solving the system of equations using stable flow modes. An embodiment of the method includes excepting one or more cells from the re-stepping portion where a recurrent pattern of flow mode change is detected.

Abstract: An apparatus and method of assessing a narrowing in a fluid filled tube having a fluid flow pressure wave having a backward-originating pressure component and a forward-originating pressure component without taking a flow velocity measurement, comprising: taking pressure measurements in the tube; separating the pressure components into the backward-originating pressure component and the forward-originating pressure component; identifying a time window when the differential of flow velocity (dU) is minimal or absent; and deriving the backward and forward pressure components for pressure measurements taken in at least the time window.

Abstract: A flow rate measuring device simplifies calculation, reduces memory required for calculation, absorbs variations due to manual operation and, depending on the state of ignition, improves the accuracy of appliance identification by extracting features of appliances. The flow rate measuring device includes: a difference value conversion unit that converts into codes difference values of the flow rate measured at constant time intervals by an ultrasonic flowmeter; an appliance feature extraction unit creates an appliance feature code string indicating a feature of each appliance by, for example, making comparison and judgment using a third last code, a second last code, a last code and a current code of the codes obtained at constant time intervals, and by performing code deletion; and an identification unit performs appliance identification by comparing the appliance feature code string with an appliance inherent feature code string indicating the feature code string inherent in each appliance.

Abstract: A method of diagnosing a fault in a common rail fuel system having a proportional-integral-derivative (PID) controller includes determining a first integral output corresponding to a first fuel flow condition and a first rail pressure setting. The method includes comparing the first integral output with a threshold integral output and determining a second integral output corresponding to a second fuel flow condition and the first rail pressure setting, when the first integral output is greater than the threshold integral output. The method includes determining a third integral output corresponding to the first fuel flow condition and a second rail pressure setting, when the first integral output is greater than the threshold integral output. The method includes identifying a failure in at least one of a flow control valve arrangement and a pressure relief valve of the common rail fuel system based on the first, second, and the third integral outputs.

Abstract: The present invention provides a gas shutoff device that prevents tampering procurement of gas or tamper due to stealing of the gas shutoff device.

Abstract: This disclosure relates generally to valves, and more particularly, to gas valve assemblies. In one example, a valve leakage test may be performed on a valve assembly including a valve body with a first valve and a second valve, where the valves may be positioned across a fluid path in the valve body with an intermediate volume between the valves. A pressure sensor may be in fluid communication with the intermediate volume and may sense a measure that is related to the pressure in the intermediate volume. The pressure sensor may communicate with a controller to determine a measure that is related to a pressure change in the intermediate volume and compare the measure that is related to a pressure change to a first and/or second threshold value. The controller may output a signal if the measure meets and/or exceeds the first and/or second threshold value.

Abstract: Systems and methods for detecting leaks in a fluid distribution network are provided. In one embodiment, the method includes calculating value of non-revenue fluid. Further, the method includes receiving data corresponding to pressure from pressure sensors in the fluid distribution network and receiving data corresponding to flow from flow sensors in the fluid distribution network. Furthermore, the method includes estimating pressure values at the pressure sensors and estimating flow values at the flow sensors. The received data and estimated values of respective sensors for corresponding time periods are compared. Existence of leak in the fluid distribution network is detected if the value of non-revenue fluid is non-zero. One or more leak spots are located, if a leak is detected, by solving an optimization problem.

Abstract: A method for monitoring water consumption. A set of locations in a fluid transport system in a structure is monitored for sounds generated by a fluid flowing at an endpoint of the fluid transport system. Current acoustic data is generated for the sounds detected from monitoring the set of locations. The current acoustic data is compared with historical acoustic data to form a difference. A determination is made as to whether the difference exceeds a threshold. An action is performed in response to determining that the difference exceeds the threshold.

Abstract: A method for autonomous testing of traveling valve assembly leakage and standing valve leakage for an oil or gas rod pumped well installation, and for autonomous adjustment of one or more pump operation characteristics based upon the autonomous test results. Traveling valve assembly leakage testing includes autonomous stopping and holding of the polished rod during an upstroke, autonomous determination of a rate of change in the polished rod load, and autonomous determination of a traveling valve leakage factor. Standing valve leakage testing includes autonomous stopping and holding of the polished rod stationary during a down stroke after weight transfer, autonomous determination of a rate of change in the polished rod load, and autonomous determination of a standing valve leakage factor.

Abstract: Methods for measuring the leakage rate of a downhole pump using either measured axial load information from the drive rod string or using measured production data. The invention is for methods of applying the leakage rate to a downhole dynamometer card, for a reciprocating rod pump, for determining well production.

Abstract: A method includes receiving a result of a benchmark leak detection test for a pressure system and determining whether the result indicates that a leak is present in the pressure system. In response to the result of the benchmark leak detection test indicating that a leak is not present in the pressure system, the method includes performing a subsequent leak detection test for the pressure system, comparing a result of the subsequent leak detection test to the result of the benchmark leak detection test, and determining, based on the comparison, whether the subsequent leak detection test indicates that a leak is not present in the pressure system. A time to determine whether a leak is not present based on the comparison is less than a time to determine whether a leak is not present based on the benchmark leak detection test.

Abstract: A method for estimating a location of a leak (x) in a pipe (1). A liquid of a known density is fed into the pipe at a first inlet pressure (P1). When the liquid achieves a substantially steady flow rate, the flow rate passing into the pipeline is recorded. This step is repeated at a second, different, inlet pressure (P2). Using this data, an estimate of the leak location (x) and the area of the leak is calculated by simultaneously solving an expression which is based on relating the frictional energy losses of the liquid travelling through the pipeline (1) to the pressure in the pipeline at the leak (Pleak) and the flow rate of liquid from the leak.

Abstract: An off-board vehicle fuel containment tester that utilizes a vacuum/pressure pump to change the pressure in the vehicle's fuel handling and containment system. A microprocessor is programmed to control the vacuum/pressure pump system and through the reading produced by a pressure transducer will determine, by the pressure changes occurring in the containment system, if a leak is present and the size of the leak. Once a leak is determined to be present, a gas analyzer that can detect carbon monoxide and hydrocarbons is used to find the point of leakage in the vehicle containment system.

Abstract: Meter electronics (20) for quantifying a fluid being transferred is provided. The meter electronics (20) includes an interface (201) configured to communicate with a flowmeter assembly of a vibratory flowmeter and receive a vibrational response and a processing system (203) coupled to the interface (201). The processing system (203) is configured to measure a mass flow and a density for a predetermined time portion of the fluid transfer, determine if the fluid transfer is non-aerated during the predetermined time portion, if the predetermined time portion is non-aerated then add a mass-density product to an accumulated mass-density product and add the mass flow to an accumulated mass flow, and determine a non-aerated mass-weighted density for the fluid transfer by dividing the accumulated mass-density product by the accumulated mass flow.

Abstract: Techniques for leak detection are described. A leak detection module may include a plurality of wires comprising one or more collection points. The leak detection module may further include a capacitor configured to store a charge for powering the module during a power-off state and a plurality of switches to be controlled by a processor. The processor may initiate a predetermined switching sequence when a power-off state has been detected. During the switching sequence, leak detection data may be collected at the one or more collection points. The collected leak detection data may be stored in a set of registers. The leak detection module may transmit the stored leak detection data. Other embodiments are described and claimed.

Abstract: A method for helium mass spectrometric fine-leak test is based on quantitative determination of maximum test-waiting time, which gives a method for quantitative determination of the maximum test-waiting time for fine-leak test during a helium mass spectrometric test process of the sealability, and gives a method for determining the criterion for measured leak rate by taking the minimum helium gas exchange time constant, i.e., a rigour grade ?Hemin, of an acceptable sealed electronic component as a basic criterion for helium mass spectrometric fine-leak test. Based on the inventive method for quantitative determination of the maximum test-waiting time, for most of the cavity volume ranges, the maximum test-waiting time that is determined accurately may be much longer than 1 hour or 0.5 hour as determined qualitatively by the existing related standards.

Abstract: A leak detection system includes a pressure system that requires leak and/or pressure testing. A pressure sensor coupled to the pressure system senses a first pressure at time0, after which fluid pumping system provides a selected volume of test fluid to the pressure system. The pressure sensor senses a test pressure at time1 and at selected intervals ‘n’ to time(n+1) and transmits a signal reflect of the pressures at each time to a general purpose computer for recording and storage on a computer readable medium. An operating program is configured to calculate a leak detection value, which is a function of a ratio of the first pressure at time0 and the test pressure at time1; the test pressure at time1 and the test pressure at time2; and so on to a test pressure at the time and the test pressure at the time(n?1). A graphical output is configured to display the leak detection value as a function of time.

Abstract: A method for determining the size of a leak in the liquid-containing tank device of a vehicle, in particular of a motor vehicle, the liquid influencing the pressure in the tank device by evaporation, with the following steps: generating a first pressure as a reference pressure in the tank device at a first instant, detecting a first pressure characteristic up to a second instant, generating a second pressure at a third instant, the first pressure and the second pressure being chosen to be different, detecting a second pressure characteristic up to the fourth instant, determining the pressure gradient of the first pressure characteristic at the second instant and of the pressure gradient of the second pressure characteristic at the third instant, determining the first pressure difference of the pressure at the second instant from the reference pressure, determining the second pressure difference of the pressure at the third instant from the reference pressure, computing the size of the leak depending on the de

Abstract: A method for verifying whether a technician is accurately monitoring one or more Leak Detection And Repair (LDAR) components. The method includes receiving a request to display an assignment. The assignment lists one or more LDAR components to be monitored in one or more areas. The assignment also lists one or more artificial LDAR components that do not exist in the areas. After receiving the request to display the assignment, the method includes displaying the assignment and receiving information regarding one of the artificial LDAR components.

Abstract: A hydrostatic pressure testing system for hydrostatic pressure testing of pipe or other vessels. A control center may include a computer program that monitors, records, and controls the system during testing. A test fluid assembly may include a fill conduit capable of providing a test fluid to an inlet section of a vessel to be tested in response to a command from the computer program. A pressure-release safety assembly may have a vent conduit in fluid communication between an outlet section of the vessel and a safety valve. The safety valve may be in fluid communication with a bleed tank for storing an outlet flow of test fluid from the vessel. The safety valve is actuated to relieve fluid pressure in the vessel in response to a selective condition. A method of using the system to conduct hydrostatic pressure testing is also described.

Abstract: A method for detecting a leak in an intake tract of an internal combustion engine involves operating the engine at two operating points and comparing a deviation of measured mass flows from expected mass flows at the first and at the second operating points.

Abstract: Generally described herein are devices, methods and systems related to detecting a leak present in a gastric banding system for the treatment of obesity. For example, a leak detector may include a syringe, a leak sensing unit and a needle, and may measure a pressure decay within a gastric banding system after the needle penetrates the patient's skin and is inserted into an access port connected to the gastric band of the gastric banding system. The pressure decay may be interpreted to determine if a leak is present in the gastric banding system.

Abstract: A method to model a complex system of pipes. The model takes into account the physical processes in a tree-type piping system and provides for an accurate modeling of a real world tree-type piping system. In a preferred embodiment, a computer program is provided for analyzing models of dry pipe systems. The computer program includes a user interface and a computational engine. The user interface allows a model of a dry pipe system to be defined and the computational engine determines a liquid flow time through the model of the dry pipe system. The computational engine provides a verification of the liquid flow time in a model of a referential dry pipe system within 20% of an actual liquid flow time in the referential dry pipe system.

Abstract: A leak detector for detecting and locating leaks in a water supply pipe of plastics, the leak detector comprising a first sensor at a first position arranged to detect a leak signal travelling along a pipe, a second sensor arranged to detect a leak signal travelling along the pipe at a second position spaced from the first position, and a processing device adapted to receive the signals from the first sensor and the second sensor. The processing device may be adapted to determine the velocity of the signals from characteristics of the leak signals. The processing device is adapted to use the velocity and distance between the first sensor and the second sensor to determine the location of a leak. The characteristics may be the relationship between the phase and frequency of the leak signals.

Abstract: A device is provided for monitoring the integrity of a flow circuit in fluid communication with a receptacle. The flow circuit includes a pumping device for transferring fluid through the flow circuit. The device operates according to a monitoring method in which a pressure signal is received from a pressure sensor, the pressure signal being indicative of fluid pressure in the receptacle or the flow circuit. The pressure signal is then processed for detection of a beating signal. The beating signal manifests itself as an amplitude modulation of the pressure signal and is formed by interference between pressure waves generated by a pulse generator associated with the receptacle and pressure waves generated by the pumping device. The integrity of the flow circuit is determined based at least partly on the presence or absence of the beating signal. The device and the flow circuit may be part of an apparatus for extracorporeal blood treatment, and the method may be implemented as a computer program product.

Abstract: Technologies for detecting leaks in a fluid distribution system are described herein. Historical leak detection information is received from a sensor in the fluid distribution system and collected in a database. A baseline is determined from the historical leak information. Current leak detection information is then received from the sensor and the probability of a leak in the fluid distribution system is determined based on a difference between the current leak detection information and the baseline.

Abstract: A signal unit, system and method for leak detection and location in a membrane using varying signals with a low density sensor array.

Abstract: The invention relates to a device for measuring and processing an input signal (To) of at least two decades, comprising: an electron multiplier (4) that has an exponential gain on the basis of the power supply voltage (Vm) thereof and which receives said input signal (To); a power supply (5) that provides the power supply voltage (Vm) of said multiplier (4); a control circuit (6) of the power supply (5), the gain (10) and shift (11) parameters of which are adjustable and define an output signal range while varying the exponential gain of said multiplier (4); a logarithmic compression amplifier (T), the output of which is received as an input of the control circuit (6) so as to vary the exponential gain of the electron multiplier (4), in a continuous manner over the dynamic range of a measurement, on the basis of the output signal (IoG) of the electron multiplier (4), and forming the output signal (Vout) of said device; a measuring and calculating means for predetermining the value of the exponent (b) for the

Abstract: A vapor management system (10) includes a fuel tank (12), a canister (14), a pressure control valve (16) between the tank and canister and defining a high pressure side (34) and a low pressure side (32), a vacuum source (18), a purge valve (19) between the canister and vacuum source, a leak detection valve (20) connected with the canister and including a processor (30). A pressure sensor (24) and a temperature sensor (26) are disposed in a fuel vapor cavity of the fuel tank, with signals from the sensors being received by the processor. Based on an absolute temperature measured by the temperature sensor, the processor compares a predicted pressure in the fuel tank to the measured absolute pressure, and identifies a leak on the high pressure side if the predicted pressure is outside a tolerance range, while maintaining pressure in the fuel tank.

Abstract: An abnormal discharge alarm device is applied in a steam trap. The steam trap is installed in a pipeline of a steam system. The abnormal discharge alarm device includes a power generation component and a control circuit. The power generation component receives a fluid discharged from the steam trap and generates a self-generated electric power. The control circuit receives and detects the self-generated electric power to obtain a detection result. The control circuit sends an alarm signal when the detection result is greater than a predetermined threshold value. In addition, the abnormal discharge alarm device may further include a monitoring unit. The control circuit transmits the detection result to the monitoring unit. The monitoring unit obtains an updated threshold value according to accumulated detection results, and determines whether to send an alarm after comparing the updated threshold value with a real-time detection result.

Abstract: A fuel leakage detection system for an underground fuel piping system having fuel service pits installed at locations along the piping. Each pit has a pressure sensor and a reference electrode positioned external to the pit assembly for continuous and automatic monitoring of fuel pressure and pipe-to-soil potential measurements of an impressed current cathodic protection (ICCP), and each pit assembly includes a processor and a transceiver. The system provides simultaneous and synchronized pressure and ICCP potential measurements which are transmitted over a wireless network to a control station that performs accurate location of a leakage point in the underground piping and can detect pressure loss during fueling operations which produce strong pressure transients that normally mask detection of pressure loss in the fuel piping, and can determine a leak in the piping and its location by analyzing the pipe-to-soil potentials taken on the fuel piping and pressure losses occurring between transients.

Abstract: A leak detection system is provided for detecting a leak in a fuel line. A controller determines the presence of a leak in the fuel line based on an analysis of data obtained from individual leak tests performed on the fuel line, the individual leak tests may span one or more fuel delivery events.

Abstract: The invention provides a system for leak detection of a fluid in a pipe network. The system includes flow meters, and vibration detectors adapted to be attached to a pipe at a location in the pipe network. A processor analyzes signals generated by the flow meters and vibration detectors to identify the presence of one or more leaks in the pipe network. The invention also provides a method for detecting and localizing leaks in a pipeline network, and a device comprising a flow meter integral with a vibration detector for use in the system of the invention.

Abstract: In one aspect, the invention relates to a system for monitoring a fluid dispensing system having a storage tank and a piping system having a maximum output flow rate threshold. The system includes a dispenser configured to dispense fluid from the fluid dispensing system during a dispensing time interval, a metering device in fluid communication with piping system, the metering device configured to measure a plurality of sample flow rates over time in response to fluid passing through the metering device, a gauge for measuring a volume of fluid dispensed from the storage tank during the dispensing time interval and a processor for executing a monitoring application which generates an alert within a substantially real-time period in response to an event of interest, the monitoring application comparing the maximum output flow rate threshold to the plurality of sample flow rates over time to generate the alert when one of the sample flow rates exceeds the maximum output flow rate threshold.