Abstract: An apparatus used in the production of glass, and a process for minimizing the inclusion of platinum group metal particulate into molten glass during glass production are provided, the apparatus comprising a first conduit formed of a platinum group metal, the first conduit comprising a top wall portion, a side wall portion, an outer surface, and a length, and a heat sink formed of a platinum group metal and affixed continuosly to the outer surface and extending longitudinally along at least part of the length of the first conduit proximate the top wall portion for the dissipation of heat therefrom, wherein the inner volume has a maximum temperature, T(max inside top wall), and the inner surface proximate the heat sink has a lower temperature, T(min inside top wall), and wherein platinum group metal particulate formed during the production process will deposit on the inner surface area of the top wall portion not in contact with the molten glass.

Abstract: Manufactured apparel products are provided which are made entirely on a circular knitting machine having needles on its dial. Such products include socks having patterns of the links-links type with a cut yarn central motif of the ribbed type with cut yarn central motif and of the interrupted and resumed ribbed type with or without cut yarn central motif. Methods of making such products are also provided.

Abstract: The present invention relates to a washing device. The washing device comprises: a case; a tub supported by the case, the tub having a laundry entrance hole for taking laundry in or out in a front portion thereof and an external-air inflow hole for introducing external air therethrough; an external-air inflow tube passing through the case and connected to the external-air inflow hole so as to guide the external air outside the case into the external-air inflow hole; a drum having a laundry entrance hole corresponding to the laundry entrance hole of the tub, the drum being rotatably installed within the tub; a shaft connected to a rear portion of the drum; a bearing housing rotatably supporting the shaft; and a suspension assembly for decreasing the vibration of the drum and of a driving part comprising a motor for rotating the shaft.

Abstract: A pressure steam treatment apparatus according to the invention includes a pressure steam treatment chamber and labyrinth sealing chambers. The labyrinth sealing chambers are respectively arranged on a fiber bundle inlet and on a fiber bundle outlet of the steam treatment apparatus, having a running path of the fiber bundle in a horizontal direction and having plural labyrinth nozzles on top and bottom of the running path. The difference between a maximum value and a minimum value of the distance in the perpendicular direction of the top and bottom side labyrinth nozzles, of a pair of opposing labyrinth nozzles is 0.5 mm or smaller when the ambient temperature of the labyrinth sealing chamber is 140° C. This structure ensures that the energy cost can be reduced, the deformation of the apparatus and also, the raise of fuzz on the fiber bundle and fiber bundle breakage can be prevented at the same time.

Abstract: Security tag includes a housing and a movable locking element. A latch within the housing is resiliently biased toward the movable locking element and movable responsive to a magnetic field between a locked position and an unlocked position. A guide structure is arranged to constrain movement of the latch. The latch and the guide structure are cooperatively arranged to ensure an engagement that will disrupt a motion trajectory of the latch occurring when the housing is subjected to a physical impact. Consequently, the latch is selectively inhibited from moving fully from the locked position to the unlocked position when the housing is subjected to the physical impact.

Abstract: A locking system for a storage compartment of a storage container is provided, the locking system including a latching mechanism and a locking mechanism. When the locking mechanism is in a locked position, the latching mechanism is prevented from unlatching and opening the compartment. When the locking mechanism is in its unlocked position, the latching mechanism is allowed to be unlatched and the compartment to be moved to its open position. The key code used with the locking mechanism may be the same or different than the key code used with the locking system of another storage compartment of the storage container.

Abstract: An outer handle device is provided in which a cylinder lock placed adjacent to an opposite end portion of an outer handle and operatively connected with a latch mechanism is attached to an outer panel, the outer handle having one end portion pivotally supported by the panel. The device includes a base member sandwiched between an outer surface of the panel and the cylinder lock and a bracket which sandwiches the panel between the bracket and the base member, and is fastened to the cylinder lock. In a temporarily mounted state where the base member and the bracket are held by the panel by engagement of the bracket with the base member, the cylinder lock can be inserted from the outer side of the panel into the base member and the bracket.

Abstract: The present invention relates to novel mixtures based on sulfur-crosslinked triglyceride, a process for their preparation, and their use as fertilizers, in particular for promoting the growth of plants which require sulfur.

Abstract: A fertilizer is obtained from defluorinated phosphate rock, previously treated in an acidic medium, with the particularity of being almost entirely available and assimilable, ensuring that phosphorus is kept soluble in the soil substrate so that it can be entirely assimilated by plants. It responds to the following reaction: HnPO4Xm+SO4?2?HnPO4?m+SO4?2+NH4+H2O, which at a density of from 1.25 to 1.30, and pH 1.8-2.6, becomes almost entirely available to and assimilable by plants, and remains soluble in the soil stratum. The process developed for yielding the liquid phosphate fertilizer solution is disclosed.

Abstract: A substantially recrystallized extrusion may include from about 0.7 to about 1.3 wt % silicon, up to about 0.50 wt % iron, from about 0.03 to about 0.2 wt % copper, up to about 0.5 wt % manganese, from about 0.6 to about 1.2 wt % magnesium, up to about 0.05 wt % chromium, up to about 0.2 wt % zinc, up to about 0.10 wt % titanium and the balance consisting essentially of aluminum and incidental elements and impurities. The disclosed alloy may be homogenized at a temperature above 1030° F. (554.4 ° C.) and have a recrystallized grain structure. Extrusions made from the disclosed alloys and having a wall thickness ranging from about 0.050 to about 0.500 inches (1.5-˜12.5 mm) provides a tensile yield strength of greater than 42 ksi (290 MPa).

Abstract: The invention relates to a method for producing tailored sheet-metal strips, in which at least one sheet-metal strip having a substantially planar surface is integrally connected along its longitudinal edge to at least one further web-shaped semifinished product made of metal, wherein the at least one further web-shaped semifinished product differs from the at least one sheet-metal strip in terms of at least one of its properties, and wherein the at least one sheet-metal strip and the at least one further web-shaped semifinished product are fed continuously to at least one joining station, characterized in that a web-shaped semifinished product having a three-dimensional structure, a hollow profile and/or a multiplicity of recesses and/or holes in succession along its longitudinal edge is used as the at least one further web-shaped semifinished product which is fed to the joining station. An apparatus for carrying out the method is furthermore claimed.

Abstract: Disclosed is a hot-pressing apparatus capable of quenching a workpiece at a sufficient cooling rate. A hot-pressing apparatus includes a lower die and an upper die. The hot-pressing apparatus causes the dies to press a workpiece, and at the same time, to keep the forming surfaces thereof in contact with the workpiece to cool the workpiece. Depression parts are formed in parts of the lower die which faces external corners of the upper die, and parts of the upper die which faces external corners of the lower die. The water-feed channel and the lower water-feed device, and the water-feed channel and the upper water-feed device are provided to feed cooling water to spaces between the workpiece and the dies.

Abstract: An electrically heating device is provided with a pair of clamp units serving as electrodes for energization and applying tension to a workpiece to be heated clamped between the clamp units by moving the clamp units in the direction in which the clamp units separate from each other during energization heating. The clamp units each include a facing surface inclined with respect to the moving direction of the clamp units and form, by the facing surface, a preform including an inclined surface inclined with respect to the plane direction of the workpiece in a clamping portion clamped between the clamp units in the workpiece.

Abstract: A press brake includes a first guide rail on one side, a second guide rail on another side, an ATC device and a first measurement portion movable on the first guide rail, and a second measurement portion movable on the second guide rail. The first and second measurement portions measure a bent angle of a workpiece. The second guide rail is different from the first guide rail in their cross-sectional shapes. The first measurement portion includes a main unit having a sensor, and a first coupling portion coupling the main unit with the first guide rail. The second measurement portion includes the main unit, and a second coupling portion different from the first coupling portion coupling the main unit with the second guide rail. The ATC device and the measurement portions can be made coexistent and the main units of the measurement portions can be made identical to each other.

Abstract: A method of using a hydraulically driven pressing device for pressing a fitting on a tube is provided. The pressing device includes a piston and a cylinder for acting on pressing jaws. A piston shaft is connected to rollers. The pressing device can be used to carry out pressing operations requiring different levels of pressing power, by using an adjustable stop which is provided in the direction of displacement of the piston in order to achieve different end positions for the piston during the piston return stroke.

Abstract: Embodiments of the subject invention are directed to a method and apparatus for measuring torque applied during installation of a helical pile. Specific embodiments relate to a helical pile installation torque measuring and monitoring system for use during helical pile installation. In a specific embodiment, a load cell pin, or torque pin, is incorporated into the drive head and equipment attachment to measure the direct forces, or torque, that is being applied by the drive head as the helical pile is rotated into the ground. The direct forces, or torque, are relayed to a data capturing device, which records the data and, optionally, displays one or more of the following: the forces, the torque created by the forces, the inclination angle of installation, and the downward, or longitudinal, force applied to advance the helical pile.

Abstract: A device for classifying strain gauges includes a holder capable of receiving strain gauges and capable of being rotated by a rotating device, the holder being connected to the rotating device by a linking device; and a heater capable of heating the holder and arranged about the mounting, the linking device including a cooling device capable of limiting the heating of the rotating device.

Abstract: A fluid flow system (300) is provided. The fluid flow system (300) includes a pipeline (302) with a flowing fluid. The fluid flow system (300) further includes a first vibrating meter (5) including a first sensor assembly (10) located within the pipeline (302) and configured to determine one or more flow characteristics, including a first flow rate. A second vibrating meter (5?) including a second sensor assembly (10?) located within the pipeline (302) is provided that is in fluid communication with the first sensor assembly (10) and configured to determine one or more flow characteristics, including a second flow rate. The fluid flow system (300) further includes a system controller (310) in electrical communication with the first and second vibrating meters (5, 5?). The system controller (310) is configured to receive the first and second flow rates and determine a differential flow rate based on the first and second flow rates.

Abstract: A system for performing a flash separation of a reservoir fluid includes a sample chamber configured to hold the reservoir fluid and a flash apparatus in fluid communication with the sample chamber. The flash apparatus includes a microfluidic device configured to flash the reservoir fluid in fluid communication with the sample chamber, and a separation chamber configured to separate the flashed reservoir fluid into a liquid phase and a gaseous phase in fluid communication with the microfluidic device. The system further includes a gas receptacle configured to store the gaseous phase. A method for performing a flash separation of a reservoir fluid includes providing a reservoir fluid to a microfluidic device, urging the reservoir fluid through the microfluidic device such that the reservoir fluid is lashed within the microfluidic device, and separating a liquid phase and a gaseous phase from the flashed reservoir fluid.

Abstract: Cavity enhanced absorption spectroscopy systems and methods for detecting trace gases using a resonance optical cavity, which contains a gas mixture to be analyzed, and a laser coupled to the cavity by optical feedback. The cavity has any of a variety of configurations with two or more mirrors, including for example a linear cavity, a v-shaped cavity and a ring optical cavity. The cavity will have multiple cavity resonant modes, or a comb of frequencies spaced apart, as determined by the parameters of the cavity, including the length of the cavity, as is well known. Systems and methods herein also allow for optimization of the cavity modes excited during a scan and/or the repetition rate.

Abstract: A virtual impactor includes a jet nozzle that jets, from a jet outlet, a gas that contains particles, an opposing nozzle that is disposed with a specific separation distance from the jet nozzle and draws in, as a secondary flow, from a vacuum inlet at one end portion, a portion of the gas that is jetted from the jet nozzle, and a variable mechanism that varies at least one of a width of the jet outlet, the specific distance, and a width of the vacuum inlet.

Abstract: A method and system for evaluating a fluid in a machine entails periodically evaluating a permittivity of the fluid and based on periodically evaluating the permittivity of the fluid, observing a change in the permittivity of the fluid. Based on the observed change in the permittivity of the fluid, it is determined whether the fluid is exhausted or contaminated.

Abstract: A leak detection device has a test chamber which, for evacuation, is connected to an evacuation pump device. Moreover, the test chamber is connected by a test gas line to a test gas pump device. The test gas pump device is connected, at its main inlet, to a test gas detector, such that a detection of test gas can take place using the counter-current principle. A valve device is arranged in the test gas line. This valve device has a test gas chamber for temporary storage of test gas removed from the test chamber.

Abstract: The present invention provides a system and method for a milk measuring device for measuring the acoustic properties, such as acoustic damping and sound velocity in milk, in order to determine milk properties. The sound velocity in milk depends on temperature and composition. By carrying out, for example by means of a piezo element, a reference measurement on vibrations that have been directed by a second piezo element into a wire or the like of known material, which wire is strung in the measuring chamber which is filled with the milk to be tested, the milk temperature can be derived, so that other milk properties, in particular the fat/protein composition, can be determined in a more reliable manner.

Abstract: A viscometer assembly includes a first plate with a rail configured to constrain fluid thereon between its edges by surface tension. A second opposing plate has a surface spaced from the rail by a predefined gap of constraining fluid to the rail by surface tension when the rail is inclined and gravity pulls the fluid along the rail. The kinematic viscosity of the fluid is determined as a function of the predetermined gap and the time it takes the fluid to flow along the rail.

Abstract: The present invention pertains to a biological sample measurement device, which is intended to be easier to use. To achieve this object, the present invention comprises a main body case (1) having a sensor insertion opening into which a sensor for measuring biological samples is inserted, a connection terminal (20) provided within the main body case (1) behind the sensor insertion opening, (5) and a shutter 7 that is provided within the main body case (1) between the sensor insertion opening (5) and the connection terminal (20) and that opens and closes the sensor insertion opening (5). This configuration makes the device easy to use.

Abstract: An evaluating apparatus includes a FP preparing part that prepares a target FP configured by peaks, retention time points and UV spectra thereof detected from a 3D chromatogram of a multicomponent drug that is an evaluation target at a specific wavelength.

Abstract: An apparatus for detecting particles in a fluid is provided including a substrate, a plurality of channel through holes extending through the substrate, wherein the channel through holes are configured to carry the fluid, a plurality of circuits monolithically integrated with the substrate, wherein each circuit of the plurality of circuitries is arranged adjacent a respectively assigned channel through hole, each circuit including a detection electrode and an control circuit coupled to the detection electrode and configured to control access to the detection electrode, wherein each detection electrode is positioned relative to the respectively assigned channel through hole such at least one electrical property of the fluid flowing through the channel through hole can be detected.

Abstract: Apparatus for physically analyzing soil includes a sample changer for receiving at least two soil-sample holders, and having an element for placing each sample holder and sample thereof in a measurement area, in turns, according to a cycle repeated over time, the apparatus including: elements for measuring the size of the samples; elements for measuring the potential of the samples containing water; and elements for measuring the weight of the samples, wherein all of the measuring elements are grouped together in the measurement area so as to be simultaneously used implemented for a given sample when the latter is placed in the measurement area. The shrinkage curve and water potential curve, obtained from the measurements, represent the change, over time, in the status of the water and structure of the soil sample during the drying thereof, and can be used to determine the hydrostructural characteristics of the soil.

Abstract: Methods of testing brittle particulate materials are described. In a preferred embodiment, a method includes characterizing the particle disintegration or breakage after a sample of brittle particle material is treated with a fluid or chemical. The particle disintegration may be characterized with visual observation. Imaging, or particle size measurement methods. In, another preferred embodiment, a method includes crushing 100-200 particles of a brittle particulate material for statistical analysis of its mechanical property. Un yet another preferred embodiment, a method includes analyzing the results of single particle crush of a brittle particulate material with Weibull distribution and using the product of the Weibull modulus and characteristic property as a unified measure of the mechanical property of the brittle particulate material.

Abstract: Provided are a device and a method which determine a threshold value for detecting abnormality in a working path in which the cutting condition changes momentarily to thereby enable abnormality determination. Cutting force that becomes an abnormality determination value and threshold value information are previously calculated by cutting simulation, and a threshold value with which a comparison is to be made is determined from the position coordinates of a working machine which have been acquired during cutting and the measurement result of cutting force to thereby enable abnormality determination.

Abstract: A sensor device for detecting at least one flow property of a fluid medium, in particular for detecting the air flow in the intake tract or the charge air tract of an internal combustion engine is provided. The sensor device has a sensor housing, which has an electronics chamber, an electronic module being situated at least partially in this electronics chamber. The electronic module has at least one support profile and at least one circuit carrier connected to the support profile. The circuit carrier carries at least one evaluation circuit. The sensor device is characterized in that electronic components are situated on the circuit carrier, on both a top side and a bottom side, and the support profile has a cavern which accommodates at least one electronic component situated on a bottom side of the circuit carrier.

Abstract: A fuel measurement system for measuring a fuel consumption amount of an engine, intended to reduce a measurement error of a Coriolis flowmeter to thereby improve measurement accuracy and reproducibility of a fuel consumption amount. The system includes: a Coriolis flowmeter provided on a fuel supply path for supplying a fuel to the engine to measure a flow rate of the fuel in the fuel supply path; and a temperature control mechanism provided in an upstream side of the Coriolis flowmeter on the fuel supply path to control a temperature of the fuel flowing into the Coriolis flowmeter.

Abstract: A method and apparatus are provided for displaying an accumulated fuel usage to a driver of a rental vehicle, such as a rental truck. The rental vehicle has a fuel usage meter that incudes a digital display for displaying fuel consumption of a rental vehicle to a rental customer. The customer is instructed to reset the accumulated fuel consumption display to zero when the customer takes possession of the vehicle and is instructed to read the accumulated fuel consumption display before returning the vehicle to determine an amount of fuel consumed during the rental of the vehicle. The meter retains the accumulated fuel consumption when the engine is turned off, when the meter is uncoupled from the data bus of the vehicle, and when vehicle power is disconnected from meter.

Abstract: A simulated gas supply apparatus includes a raw gas source group including a plurality of raw gas sources, a plurality of flow controller groups, each of which includes a plurality of flow controllers, a flow control system including the flow controller groups, a primary supply pipe for supplying a simulated gas to an evaluation device, a primary exhaust pipe for exhausting the simulated gas, a switching valve system including a plurality of switching valves so as to switch the simulated gas flow between the primary supply pipe and the primary exhaust pipe, and a controlling unit that controls the flow control system and the switching valve system.

Abstract: The present invention involves using mechanized strategies to fabricate test samples as well as strategies for selecting sample substrates. These strategies significantly reduce the effort and the variabilities associated with making test samples and testing hair fixative compositions. The technology allows simple, rapid, inexpensive evaluation of hair fixative compositions in a way that generates consistent, reliable data. The quality of the data is high enough to facilitate easier qualitative and quantitative comparisons among compositions under investigation. In preferred modes of practice, the present invention provides a simple way to screen new polymer systems and other developmental products. Additionally, this invention can be used to generate more meaningful comparative data for customer and personal care industry presentations.

Abstract: A measurement system including a container including an element moveable within an internal volume of the container. A sensor wirelessly measures the position of the element within the container and transmits the measured position information. Also included is an information system capable of reading the position information from the sensor.

Abstract: A method for pressure testing a well system includes: pressurizing testing fluid within a closeable chamber of a well system; determining a leak within the closeable chamber using real time pressure and temperature measurements of the volume of testing fluid within the closeable chamber; and determining the pathway of the leak using real time pressure and temperature measurements of a volume of fluid that is disposed adjacent to the closeable chamber.

Abstract: Devices and methods for borehole seismic investigation. The devices can include a first sensor for acquiring data relating to a microseismic event, a second sensor for detecting the start of a microseismic event and a command module for activating the first sensor to transmit data when the second sensor detects the start of the microseismic event. The methods can include activating a first sensor to transmit data relating to a microseismic event when a second sensor detects the start of the microseismic event. The method can also include deactivating the first sensor, or stopping data transmission substantially when the microseismic event ends.

Abstract: The invention provides a fibre cloth inspecting method for inspecting a fibre cloth regarding sparse density, filament break, various kinds of mark, fabric runs, break, weaving validation, and dyeing uniformity. The method includes following steps: scanning the fibre cloth by a scanning light beam; retrieving a light pattern generated by the scanning; generating an inspecting result information according to the light pattern in relation to the fibre cloth; and analyzing the fibre cloth regarding sparse density, filament break, various kinds of mark, fabric runs, break, weaving validation, and dyeing uniformity according to the inspecting result information.

Abstract: A system for monitoring a power transmission line of a power grid, including a first comprehensive sensor (402, 502) disposed at the intermediate position of a power transmission line between two towers including an altimeter, a first acceleration sensor, a temperature and humidity sensor and a rainfall sensor; a second comprehensive sensor (404, 504) disposed at the cable connector of the power transmission line including a leakage current sensor, a tension sensor and a wind speed and direction sensor; and a second acceleration sensor (406, 506) disposed at the intermediate position of the power transmission line between the cable connector of the power transmission line and the first comprehensive sensor (402, 502). A method for monitoring a power transmission line of a power grid, including a step of monitoring the sag condition, wind yaw angle, motion and position tracking, flutter conditions, breeze vibration level, fatigue life and icing situation of a power transmission line.

Abstract: The purpose of the invention is to supply an apparatus and method for measuring the three-dimensional velocity and void fraction in gas-liquid two-phase flows. It mainly includes a measuring probe (1), four pressure sensors (18), three electrodes (3), a back-flushing system (19), a pressure-based electrode couple selection system (14), and a data acquisition and analysis system (28).

Abstract: A flow meter regulation valve fastening structure includes a holder with one side coupled with a regulation valve by screwing. The regulation valve has a regulation shaft with a flange and a screw head located at an upper side. The screw head is coupled with an anchor member. The anchor member has a coupling plate at one end coupled on the screw head and an anchor plate at another end with two detent plates extended downwards from two sides to butt two sides of the frame edge of the holder for retaining. Thereby when the regulation valve is coupled with the holder and a pipe, the junction of the regulation valve and the holder can be prevented from generating fractures due to excessive turning forces.

Abstract: Disclosed is a method for determining the static unbalance of a body (30) provided with a locating surface (31) by means of a center-of-gravity weighing scale (10), the method including measuring the position of the locating surface (31) of the body (30) with respect to its mount by means of electric displacement sensors (16), computing from the measurement signals of the displacement sensors (16) the eccentricity of the locating surface (31) of the body (30) with respect to the reference point of the scale (10) by means of an electric evaluating circuit, weighing the body (30) and recording mass and position of the center of gravity of the body (30) with respect to the reference point of the scale (10), and computing the unbalance of the body (30) from the measurement signals of the scale (10) and the eccentricity of the locating surface (31) of the body (30) with respect to the reference point of the scale (10) by means of the evaluating circuit.

Abstract: A physical quantity detecting device includes a metal block (a holding section) having six surfaces, inclination detectors (physical quantity detectors) respectively arranged on selected three surfaces among the six surfaces, an electronic component electrically connected to the inclination detectors, and a heat insulating material (a heat-conduction reducing section) present between the metal block and the electronic component and having thermal conductivity smaller than the thermal conductivity of the metal block.

Abstract: Technologies are generally described for detecting acceleration by sensing a movement of a liquid contained in at least one liquid flow path arranged in a film-type material. An example device may be configured to detect acceleration based at least in part on an output signal from at least one strain sensor formed on at least one surface of a film layer. The film layer may include at least one liquid flow path containing a liquid and arranged in the film layer. The strain sensor may be formed on the at least one surface of the film layer in the vicinity of the least one liquid flow path, and may be configured to detect deformation on the at least one surface of the film layer.

Abstract: A device for measuring the acceleration of a moving body includes a pendulum capable of oscillating about an instantaneous center of rotation and a detection system capable of detecting an oscillation of the pendulum that is likely to result from the acceleration. The pendulum has a geometric configuration enabling it to interact with the detection system. The geometric configuration is such that the detection system only indicates an oscillation of the pendulum that exceeds a threshold oscillation value.

Abstract: A method of measuring mechanical resonance frequency using a servo driver including the steps of: having the servo driver work under a torque control mode, by applying in the servo driver a preset torque drive signal, the motor drives the mechanical components in a microvibration state; collecting actual speed signals of the motor to obtain the actual speed signal sequence of the motor; the actual speed signal sequence of the motor being passed in sequence through a certain number of band-pass filters having a fixed pass-band frequency and different center frequencies to obtain filtered speed signals; the filtered speed signal sequences output from each of the band-pass filters being changed into absolute values and then accumulated to obtain accumulation values; comparing the accumulation values obtained from the signal sequences output from the certain number of band-pass filters, and the center frequency of the band-pass filter corresponding to the largest accumulation value being the mechanical resonance

Abstract: Various systems and method for acoustic monitoring of smelting furnaces and similar devices are disclosed. Acoustic sensors (and optionally other sensors) are mounted to the furnace. Acoustic emission events generated in the furnace are analyzed to identify conditions that exceed one or more thresholds. The location of acoustic emissions may be identified and reported. Output signals may be generated in response to acoustic emissions. The location of acoustic emissions may be used to identify the location of potential failures in the furnace.

Abstract: This application relates to methods and apparatus for monitoring of conduits, especially oil or gas pipelines, as an object such as pipeline pig moves within the conduit. The method comprises monitoring at least part of a conduit (206) using a fibre optic (202) distributed acoustic sensor (204) as the object (208) passes along the conduit. The acoustic signals detected from at least one sensing location (203) as the object moves along the conduit are analysed so as to discriminate acoustic signals received at said sensing location from different locations. The method allows the contributions to the acoustic signal at a given sensing portion from different locations to be separately identified, and can allow the detection of the location of acoustic sources along the conduit even if the source is outside the section of conduit which is monitored. The method provides a method of leak detection that can extend the monitoring of the pipeline beyond the location of the optical fibre.