Abstract: A method for patterning a recording medium selectively thermally couples a recording medium and a heat source to alter a chemical composition of the recording medium. An apparatus for patterning a recording medium has a heat source for generating and directing an incident thermal wave to a recording medium so as to alter a chemical composition of the recording medium, and a controller for coordinating a mutual position of the incident thermal wave and the recording medium for inducing a direct thermal coupling between the recording medium and the heat source.
Type:
Application
Filed:
January 3, 2002
Publication date:
July 3, 2003
Inventors:
Ernesto E. Marinero, Hemantha K. Wickramasinghe
Abstract: A method for testing a material block prior to forming the material block into one or more optical components for use with a sub-micron lithographic, high power, narrow bandwidth laser system having high wavelength stability includes the step of selecting a block of material having appropriate characteristic optical properties for the source laser system being used. The next step is to test the material block for absorption performance. Then, if the block exhibits a sufficient absorption performance, then one of more optical components such as one or more prisms, etalons, and/or windows, etc. are formed from the material block. Finally, the optical components formed from the block are inserted into a wavelength selection module of the resonator of the laser to participate in producing a high power, narrow bandwidth laser beam which may be used in sub-micron photolithographic applications.
Abstract: A temperature sensing apparatus comprises a temperature sensor, a current measuring device and temperature detection circuit. The temperature sensor contains a thermal resistor that is disposed near a motor and outputs voltages acting to the thermal resistor. The current measuring device measures quantity of current that is applied to the motor. The temperature detection circuit detects temperature of the motor according to the output voltages from the temperature sensor. And, the temperature detection circuit judges whether a predetermined quantity of current is applied to the motor during a predetermined time. When the predetermined quantity of current is applied to the motor during the predetermined time, the temperature detection circuit compares a temperature detected by the current measuring device with a predetermined temperature. When the detected temperature is lower than the predetermined temperature, the temperature detection circuit decides a wire of the thermal resistor breaks.
Abstract: A method for determining oxidation in turbine buckets allows for conditional based maintenance of the turbine buckets. The method includes measuring a temperature of a turbine bucket and comparing the measured temperature to a temperature of a reference turbine bucket to determine the condition of the bucket. The method provides useful temperature data to determine if the turbine should be stopped and the bucket serviced. This method may be used in place of interval based maintenance to increase bucket life, reduce bucket failure, and increase turbine operating time.
Abstract: A method that utilizes a dispersion-shifted fiber having compound compositions with different temperature coefficients in core to simultaneously measure the distributed strain and temperature based on Brillouin frequency shift is disclosed. The present method includes the steps of obtaining mean two peak frequencies in a multi-peak Brillouin spectrum of the dispersion-shifted fiber, determining a temperature change according to the formula of a Brillouin frequency shift of the peak relating to strain and temperature conditions of the fiber, and determining a strain change through the formula. In a 3682-m sensing length of Large-Effective-Area NZ-DS fiber, a temperature resolution of 5° C., a strain resolution of 60 &mgr;&egr; and a spatial resolution of 2 m are achieve simultaneously.
Type:
Application
Filed:
April 9, 2002
Publication date:
June 5, 2003
Inventors:
Sien Chi, Chien-Chung Lee, Po-Wen Chiang
Abstract: The present invention is a method of judging whether a substrate is accurately placed at a predetermined position when placing the substrate at the predetermined position on a plate to perform heat treatment or cooling treatment therefor.
The present invention has the step of measuring temperature of the plate at least from a first point of time to a second point of time during which the plate temperature changes, after placing the substrate at the plate, the step of calculating a temperature integrated area I determined by a range enclosed the measured temperature curve changing in time sequence and a set temperature of the plate, and the step of comparing the calculated temperature integrated area I with threshold values of a temperature integrated area set in advance.
Abstract: A system for detecting the level of fluid in a fluid containing vessel. The system includes a device for applying energy to a selected location on the vessel. A sensor in proximity to the location detects the energy level at the location during first and second intervals. A memory device stores data representative of the energy detected by the sensor at each interval, and a logic circuit compares the amount of energy of the first interval to that of the second. Data corresponding to the level of fluid in the vessel may be displayed locally or signaled to remote data receiving and display devices, as appropriate.
Abstract: An apparatus and method for evaluating thermal barrier coating material on a surface of a part or component that is subjected to transient heat/thermal cycles. A pulsed laser heating apparatus that preferably uses lenses and optical fiber focusing components simulates conditions of brief heating on the test specimen. In the method of the invention, the temporal shape, spatial distribution, and total energy of the laser pulse are designed to produce a spot of uniform illumination and heat absorption on the test specimen that closely approximates the thermal loading that the specimen is expected to receive during use. The test specimen is then examined for thermally induced changes.
Type:
Grant
Filed:
November 15, 2000
Date of Patent:
May 27, 2003
Assignee:
The United States of America as represented by the Secretary
of the Army
Abstract: A piezo-resistive thermal detection apparatus for detecting the temperature of fluid inside a cavity device, such as the temperature of ink inside an inkjet print head. The apparatus includes a detection region and a plurality of piezo-resistive devices. The detection region is disposed on the inkjet print head in the form of a rectangle and made of a semiconductor material. The piezo-resistive devices are disposed on centers of each side of the detection region, wherein stresses produced by deformation of the piezo-resistive devices are exerted on the piezo-resistive devices. When the temperature of the ink rises, the surface of the inkjet print head is heated and expands, resulting in the deformation of the thermal detection apparatus. The piezo-resistive devices experience large amounts of stress due to the deformation of the thermal detection apparatus and thus the resistances of the piezo-resistive devices change.
Abstract: A method of detecting fire ignition sources includes using an electronic temperature sensor to probe potential ignition sites. The fire hazards for the sites are determined based on at least one of measurements of temperatures at or near the site, measurements of rate of temperature rise at or near the site, and measurements of temperature gradients at or near the site. Apparatus for performing the method is also described.
Abstract: A method, software, and system determines temperature of a physical medium using remote measurements. One example of a physical medium is a cloud. A receiver receives at least one first received signal from an interaction of at least one first transmitted electromagnetic signal with the physical medium. A processing system then determines the at least one first received signal information based on the at least one first received signal. The processing system then determines the temperature of the physical medium based on the at least one first received signal information.
Type:
Grant
Filed:
August 24, 2000
Date of Patent:
March 25, 2003
Assignee:
University Corporation for Atmospheric Research
Abstract: One aspect of the present invention is a system of fabricating a barrier wall between the testing and tester volumes of an environmental test chamber. This aspect may use a plurality of pallets adapted to receive a device under test and a testing apparatus, a framework adapted to receive a plurality of pallets, and a plurality of insulation bricks associated with the plurality of pallets. The insulation bricks may be adapted such that they can cooperate to form an insulating barrier between the device under test and the testing apparatus.
Type:
Grant
Filed:
August 1, 2000
Date of Patent:
March 4, 2003
Assignee:
Pemstar, Inc.
Inventors:
Donald L. Wanek, Loren L. Swanson, Richard L. Sands, Mark Troutman, James A. Melville
Abstract: An apparatus for measuring thermomechanical properties of a photo-sensitive material sample during exposure of the sample material to a light source includes a sample holder having a sample support positionable in a sample holding area of the sample holder for holding the photo-sensitive material sample, a probe disposable relative to the sample support for measuring the thermomechanical properties of the photo-sensitive material sample, a temperature control unit having a cavity for receiving the sample holder and for maintaining the sample holder within a selectively-controlled temperature range, and an illuminating assembly operatively arranged for directing a light signal onto the sample holder for illuminating the photo-sensitive material held on the sample holder.
Type:
Grant
Filed:
October 19, 1999
Date of Patent:
January 28, 2003
Assignee:
Agere Systems Inc.
Inventors:
Nicholas James Levinos, Stephen Reid Popielarski
Abstract: Thermal image data of at least a region of a face of a person is provided. The thermal image data is transformed to blood flow rate data which includes a slope representative of the change of blood flow rate over time. The slope is compared to a slope threshold to determine a physiological state of the person. For example, it may be determined whether the person is deceptive or non-deceptive, e.g., deceptive with respect to an elicited response from the person.
Abstract: Thermal image data of at least a region of a face of a person is provided. The thermal image data is transformed to blood flow rate data and may be used to determine whether the person is deceptive or non-deceptive based on the blood flow rate data, e.g., deceptive with respect to an elicited response from the person.
Abstract: In a temperature controlling apparatus for controlling temperature by using a temperature sensor, a defect state of the temperature sensor is sensed by sensing a change of specific resistance of the temperature sensor. A temperature value of the temperature sensor is detected at each unit time during exchanging of a chemical solution or stopping of a process in a chamber of the semiconductor fabricating process. A lowest temperature among the detected temperature values and a reference temperature predetermined to sense the change of the specific resistance of the temperature sensor, are compared with each other. When the lowest temperature deviates from the reference temperature, a defect of the temperature sensor is confirmed and a message indicative of a defect state and an alarm are generated.
Type:
Application
Filed:
July 10, 2002
Publication date:
January 16, 2003
Inventors:
Ki-Hwan Park, Jong-Sub Hwang, Jeong-Hwan Kim
Abstract: A system and method for evaluating the thermal bond between a heat-producing device and a heat-absorbing apparatus. The heat-producing device may be a CPU, such as an INTEL PENTIUM microprocessor, and the heat-absorbing apparatus may be a heat sink. The two may be joined with a heat-conducting substance such as thermal grease or adhesive. In one exemplary embodiment, the heat-producing device is operated at a first power level, a first temperature measurement is then taken, the device is operated at a second power level, and then a second temperature measurement is then taken. The thermal resistance is then calculated, which may involve subtracting the second temperature from the first, and may involve dividing by the power level. The first power level may be full power, and the second power level may be near zero.
Abstract: A method for providing a thermal analysis of an assembly having a first component with an attached friction material controllably engaged with a second component. The method includes the steps of determining an initial interface temperature of the first and second components, determining a heat flux split as a function of the initial interface temperature, determining a first net heat flux into the first component and a second net heat flux into the second component as a function of the heat flux split, and determining a first and a second real interface temperature of the respective first and second components as a function of the respective first and second net heat fluxes.
Type:
Application
Filed:
April 10, 2001
Publication date:
December 19, 2002
Inventors:
Wayne M. Ferrell, Ganesh R. Iyer, Ramesh Sugavanam
Abstract: A thermal manikin has a closed perforated rigid frame covered by a breathable fabric extending over the frame and forming arms and legs. Water passages and a pump inside the manikin direct water around the manikin to simulate natural blood flow. The manikin is provided with a controller and sensor for measuring conditions inside and outside the manikin that enables simultaneous determination of Clo (thermal resistance of clothing placed on the manikin) and Im (the permeability index of the clothing).
Abstract: A system and method for evaluating the thermal bond between a heat-producing device and a heat-absorbing apparatus. The heat-producing device may be a CPU, such as an INTEL PENTIUM microprocessor, and the heat-absorbing apparatus may be a heat sink. The two may be joined with a heat-conducting substance such as thermal grease or adhesive. In one exemplary embodiment, the heat-producing device is operated at a first power level, a first temperature measurement is then taken, the device is operated at a second power level, and then a second temperature measurement is then taken. The thermal resistance is then calculated, which may involve subtracting the second temperature from the first, and may involve dividing by the power level. The first power level may be full power, and the second power level may be near zero.
Abstract: A method and apparatus for measuring and characterizing microscopic thermoelectric material samples using scanning microscopes. The method relies on concurrent thermal and electrical measurements using scanning thermal probes, and extends the applicability of scanning thermal microscopes (SThMs) to the characterization of thermoelectric materials. The probe makes use of two thermocouples to measure voltages at the tip and base of a cone tip of the probe. From these voltages, and from a voltage measured across the sample material, the Seebeck coefficient, thermal conductivity and resistance of the sample material can be accurately determined.
Type:
Grant
Filed:
August 18, 2000
Date of Patent:
November 26, 2002
Assignee:
International Business Machines Corporation
Abstract: An improved method for simulating an oxidative aging of an asphalt sample comprises accumulating a number of samples from the asphalt load under test. The samples are initially heated by convection and microwave units to a common temperature. Subsequently, the samples are incrementally, as heated in a “ramp” control heating, from 27° C. to 147° C. over a 60-minute period. Subsequently, the samples are microwave heated for three successive 60-minute periods and one 30-minute period under a pressure of 440 psi. Upon pressure release, a subsequent short convection heating and subsequent degassing, a resulting aged residue is presented which is equivalent to residue provided by known conventional tests but at a reduced time period.
Abstract: The invention relates to a method and a device for registering the presence of an ophthalmic moulding consisting of a biocompatible polymeric material, especially an ophthalmic lens, particularly a contact lens, in a package. The invention solves the problem through the use of an IR camera. Packages containing a moulding, especially a contact lens, have a change in their temperature distribution compared with a package without a contact lens. By evaluating the temperature difference, it is possible to determine whether or not there is a contact lens in a package. In particular, by using the detecting method according to the invention, one can determine whether there is a contact lens in the package directly after the filling procedure.
Abstract: A method and apparatus for measuring and characterizing microscopic thermoelectric material samples using scanning microscopes. The method relies on concurrent thermal and electrical measurements using scanning thermal probes, and extends the applicability of scanning thermal microscopes (SThMs) to the characterization of thermoelectric materials. The probe makes use of two thermocouples to measure voltages at the tip and base of a cone tip of the probe. From these voltages, and from a voltage measured across the sample material, the Seebeck coefficient, thermal conductivity and resistance of the sample material can be accurately determined.
Type:
Grant
Filed:
August 18, 2000
Date of Patent:
October 22, 2002
Assignee:
International Business Machines Corporation
Abstract: The method determines the fuel concentration in fluidic fuels for fuel cells, and in particular the alcohol concentration in an alcohol/water mixture for fuel cells operated with the mixture, such as direct methanol fuel cells. The alcohol/water mixture is passed through a heating section at a constant flow rate, a known quantity of heat is supplied to the mixture, the temperature difference between the entry and exit of the heating section is measured and the alcohol concentration is determined therefrom.
Type:
Application
Filed:
April 11, 2002
Publication date:
October 17, 2002
Inventors:
Manfred Baldauf, Waltraud Lager, Walter Preidel
Abstract: Chemical agent warfare materials and their simulant liquids are identified on terrestrial surfaces at a distance by recognizing the contaminant's infrared fingerprint spectrum brought out in thermal luminescence (TL). Suspect surfaces are irradiated with microwave light that is absorbed into the surface and, subsequently, TL is released by the surface. An optics receiver collects the released TL radiant light, and a data acquisition system searches this TL radiant flux for the contaminant's fingerprint infrared spectrum. A decision on the presence or absence of any-of-N contaminants is done by a neural network system that acts as a filter through real-time pattern recognition of the contaminant's unique infrared absorption or emission spectra.
Type:
Grant
Filed:
April 11, 2000
Date of Patent:
October 15, 2002
Assignee:
The United States of America as represented by the Secretary
of the Army
Inventors:
Arthur H. Carrieri, Irving F. Barditch, David J. Owens, Erik S. Roese, Pascal I. Lim, Michael V. Talbard
Abstract: A calorimeter that measures heat release rates of very small samples (on the order of one to 10 milligrams) without the need to separately and simultaneously measure the mass loss rate of the sample and the heat of combustion of the fuel gases produced during the fuel generation process. The sample is thermally decomposed in a small volume pyrolysis chamber. The resulting fuel gases are immedediately swept by an inert gas stream from the pyrolysis chamber into a combustion furnace in a plug-like flow. This plug flow substantially synchronizes the emerging fuel gases with the mass loss rate of the sample. Oxygen is metered into the fuel gas stream just before it enters the combustion furnace where the fuel gases are completely oxidized. The effluent from the furnace is analyzed to determine the amount of oxygen consumed per unit time and the heat release rate is computed without the need to separately measure the mass loss rate of the sample.
Type:
Grant
Filed:
December 22, 2000
Date of Patent:
October 15, 2002
Assignee:
The United States of America as represented by the Secretary
of Transportation
Abstract: The present invention provides a method and apparatus of using optical temperature measurement as an in-situ monitoring of etch rate. First of all, a plasma etching process is performed in a plasma etcher having a vacuum chamber. Then, an optical multi-channel analyzer (OMA) monitors a series of emission lines of a certain plasma species emitted from the vacuum chamber during the plasma etching process. Then, based on the intensity distribution of the emission lines detected, a computer computes and generates an optical temperature. Finally, the computer generates a relevant ER based on the optical temperature. The emission lines are emitted due to the transitions between different energy states of a certain plasma species. These transitions may be between different electronic energy states, vibrational energy states, or rotational energy states, whereas the plasma species may be any one of the reactants in the plasma chamber such as CO, CO2, CF, CF2, SiF, C2, HF, etc.
Abstract: A method and system for predicting the end of life of a packed resin or dry chemical bed in a gas scrubber including providing a plurality of thermocouples spacedly disposed in the packed bed, the thermocouples being operatively coupled to a processor, monitoring the motion of an exothermic wavefront through the packed resin or dry chemical bed by periodically sampling the thermocouples and computing a time at which the exothermic wavefront will have traversed the packed resin or dry chemical bed, the computed time being the end of life of the packed resin or dry chemical bed.
Type:
Grant
Filed:
January 7, 2000
Date of Patent:
September 17, 2002
Assignee:
C&M Inc.
Inventors:
Kye-Jin Lim, Gwon Sagong, Daniel K. Weber
Abstract: A method for determining oxidation in turbine buckets allows for conditional based maintenance of the turbine buckets. The method includes measuring a temperature of a turbine bucket and comparing the measured temperature to a temperature of a reference turbine bucket to determine the condition of the bucket. The method provides useful temperature data to determine if the turbine should be stopped and the bucket serviced. This method may be used in place of interval based maintenance to increase bucket life, reduce bucket failure, and increase turbine operating time.
Abstract: A method and apparatus are provided for detecting and monitoring micro-volumetric enthalpic changes caused by molecular reactions. Micro-machining techniques are used to create very small thermally isolated masses incorporating temperature-sensitive circuitry. The thermally isolated masses are provided with a molecular layer or coating, and the temperature-sensitive circuitry provides an indication when the molecules of the coating are involved in an enthalpic reaction. The thermally isolated masses may be provided singly or in arrays and, in the latter case, the molecular coatings may differ to provide qualitative and/or quantitative assays of a substance.
Type:
Grant
Filed:
September 14, 1999
Date of Patent:
August 20, 2002
Assignee:
U T Battelle, LLC
Inventors:
Mitchel J. Doktycz, Charles L. Britton, Jr., Stephen F. Smith, Patrick I. Oden, William L. Bryan, James A. Moore, Thomas G. Thundat, Robert J. Warmack
Abstract: A foam detector apparatus has a detector probe for detecting the presence of foam in a test sample, with the probe held above the test sample surface and indicating foaming when foam rises from the test sample surface and contacts the detector probe. The probe has a low thermal mass measuring surface for detecting contact with foam, with the measuring surface heated to a temperature above the tempering temperature of the test sample. When the liquid portion of the foam contacts the heated measuring surface, the temperature of the low thermal mass surface quickly drops to the tempering temperature of the sample, thereby indicating foam.
Abstract: This invention will provide a method of determining nondestructively, the purity or composition of an unknown material sample, such as, for example a sample of gold or silver of unknown purity. Their forms can be a: casting, bullion, coupon or disc (a coin), as well as some jewelry, such as gold or silver rings with signet surfaces. The test specimens are such that their areal dimensions are large compared to their thicknesses, thus qualifying as ‘slabs’. In order to detect a particular adulterant the method may require a dual-test procedure: The first is an application of a pulse of constant heat (or cold) and the second, if necessary, is an application of constant temperature. Furthermore, during the time the conditions are applied the slopes of the time-varying temperature patterns can be determined, the decay curves, after such conditions are removed, and their slopes can also be realized. Such information will provide a further check on the authenticity of the test item.
Abstract: Making a polymer-clad optical fiber comprising a step of determining at a plurality of temperatures the delamination resistance of the polymer coating from fiber. The delamination resistance at ambient temperature can be compared with a predetermined target value for delamination resistance in use. The delamination resistance at elevated temperature can be compared with a predetermined lower target value for ease of strippability. Coated optical fiber having delamination resistances outside the predetermined ranges will typically be rejected.
Type:
Grant
Filed:
October 15, 1999
Date of Patent:
August 6, 2002
Assignee:
Fitel USA Corp.
Inventors:
Valerie Jeanne Kuck, Peter Gerald Simpkins, Hakan Tornqvist
Abstract: A method of manufacturing a display device comprising an air-tight envelope and at least a glass part (3) which forms part of said air-tight envelope, is characterized in that the glass part (3) is warmed up, during a first time period, at a first temperature (T1), whereafter the glass part is immersed, during a second time period, in a fluid (32) at a second temperature (T2), said second temperature being lower than the first temperature (T2<T1). Preferably, 25°≦T1−T2≦85°, and, in particular, T1−T2≈50°. Preferably, 50° C.≦T1≦100° C., and, in particular, T1≈65° C. Preferably, the glass part is a display window (3) or a cone portion of a display window, and the fluid is water (32).
Abstract: An inspecting device for a thermal module for cooling a CPU of a computer to decide whether the module can work properly is disclosed. The device includes a computer stored with preset data. A measuring unit has a heater generating heat with a predetermined temperature. A converter electrically connects the heater with the computer and converts an analogous signal corresponding to the temperature of the heater to a digital signal which is sent to the computer. A force generating mechanism is provided on the measuring unit which can generate a pressing force toward the heater. When the heater is contact with a heat-generating component contact part of the thermal module and the force generating mechanism is activated to press the part against the heater, the computer compares the data stored therein and the signal received from the converter to determine whether the thermal module can attain its required performance.
Abstract: A test apparatus to determine the trip setting of a bimetallic element of a thermal tripping mechanism of the circuit breaker. The apparatus comprising a conveyance configured to receive and move the circuit breaker. A radio frequency induction heater positioned below the conveyance and including an induction coil operatively connected to the induction heater, wherein the induction coil is located below the bimetallic element of the thermal tripping mechanism of the circuit breaker. The radio frequency induction heater may operate with a frequency of 250 KHz to 750 KHz. The test apparatus can also include a mechanical ejection apparatus configured to remove the circuit breaker from the conveyance if the circuit breaker did not meet predetermined criteria and an electrical test apparatus configured to test the circuit breaker if the circuit breaker met predetermined criteria.
Abstract: A method of operating a probe-based instrument comprises placing a probe of the probe-based instrument in an operative state in which the probe interacts with a heated sample, measuring a parameter of probe operation indicative of a characteristic of the heated sample, and during the measuring step, maintaining interaction between the probe and the heated sample that is substantially free of influences caused by condensation on the probe. The maintaining step includes heating the probe to a temperature at which the measured parameter of probe operation is substantially free of influences caused by condensation on the probe. Heating the probe reduces or eliminates the formation of condensation on the probe from water or materials that have evaporated from the heated sample. The invention is especially useful in connection with atomic force microscopes and other probe-based instruments.
Abstract: The invention relates to a method of determining the qualitative composition of soil organic matter (SOM) of mineral soils using thermogravimetry, i.e., by subjecting a soil sample of constant weight to thermogravimetric analysis in the usual way and forming the quotient of the overall weight loss of the sample during heating from 200° C. to 450° C. and the overall weight loss of the sample during heating from 95° C. to 190° C. The method is straightforward and cost-effective, providing reliable figures for all mineral soils, regardless of region, climatic zone, or type of utilization.
Abstract: A test wafer for use in wafer temperature prediction is prepared. The test wafer includes: first semiconductor layer formed in a crystalline state; second semiconductor layer formed in an amorphous state on the first semiconductor layer; and light absorption film formed over the second semiconductor layer. Next, the test wafer is loaded into a lamp heating system and then irradiating the test wafer with a light emitted from the lamp, thereby heating the second semiconductor layer through the light absorption film. Thereafter, a recovery rate, at which a part of the second semiconductor layer recovers from the amorphous state to the crystalline state at the interface with the first semiconductor layer, is calculated. Then, a temperature of the test wafer that has been irradiated with the light is measured according to a relationship between the recovery rate and a temperature corresponding to the recovery rate.
Abstract: A cloud condensation nucleus spectrometer having a streamwise segmented condensation nucleus growth column. The condensation nucleus growth column includes alternating hot and cold temperature-maintaining segments arranged next to one another. The temperature difference between adjacent hot and cold temperature-maintaining segments increases from the input opening to an output opening of the condensation nucleus growth column to produce a supersaturation distribution that increases from the input to the output opening.
Type:
Application
Filed:
November 20, 2001
Publication date:
April 25, 2002
Applicant:
California Institute of Technology, a California corporation
Inventors:
Richard C. Flagan, Patrick Yung-Shie Chuang
Abstract: A method is provided for detecting the spalling off of a significant portion of buildup of alkali and/or metal from the refractory lining of a metallurgical furnace. The method includes monitoring the rate of change of temperature of the refractory lining at a plurality of spaced locations and determining when the rate of change of temperature at a predetermined number of such locations exceeds a first threshold level that a significant portion of buildup has spalled off. The invention is particularly applicable to blast furnaces and permits the addition of heat to be made to the molten metal in the furnace before the spalled off portion descends through the furnace shaft and reaches the molten metal.
Abstract: An instrument for determining thermophysical properties of a solid sample of uniform thickness is disclosed. The instrument comprises a furnace, an elliptical mirror outside the furnace, a light source at one focus of the elliptical mirror that is closest to the elliptical mirror, a beam guide having one end at the other focus of the elliptical mirror and the other end inside the furnace, a sample holder inside the furnace capable of holding at least two diffusivity samples with the front and back surface of a sample exposed, an indexing system for moving the sample holder so as to place samples held by the sample holder in the path of light leaving the beam guide, and an infrared detector for quantifying changes in the temperature of the back surface of a sample that is in the path of the light. Methods for determining the thermal diffusivity, specific heat capacity, thermal conductivity, coefficient of thermal expansion, density, and temperature of a sample using this instrument are also disclosed.
Abstract: An ebulliometric device measures with high precision a physical parameter of a liquid substance. It includes an ebulliometer having an elongate vessel into which a liquid substance is fed, a sensor for measuring the boiling-point temperature arranged in the upper part of the vessel, a pump allowing to spray substance in the form of liquid and vapor in the upper part of the vessel, and an assembly external to the vessel for condensing the vapor allowing to recycle the condensed vapor to the base of the vessel and at least one thermostat-controlled enclosure.
Type:
Grant
Filed:
February 8, 2000
Date of Patent:
April 2, 2002
Assignee:
Institut Francais du Petrole
Inventors:
David Vellut, Jacques Jose, Emmanuel Behar
Abstract: A method of determining contact wear in a trip unit of a circuit breaker is presented. The trip unit includes a microcontroller and associated memories. An algorithm (program) stored in a memory of the trip unit measures temperatures relative to circuit breaker contacts and cumulative energy dissipated in the breaker contacts, and utilizes them in a variety of analysis techniques within the trip unit to determine contact wear. These techniques include, by way of example, differential temperature analysis, measurement of cumulative energy dissipated in the breaker contacts, and calculated contact wear using sampled electrical currents and voltage and Ohm's law.
Abstract: This invention will provide a method of determining nondestructively, the purity or composition of an unknown material sample, such as, for example a sample of gold or silver of unknown purity. Their forms can be a: casting, bullion, coupon or disc (a coin), as well as some jewelry, such as gold or silver rings with signet surfaces. The method involves subjecting one of the large surfaces of the sample of known thickness to an elevated or a cold temperature, relative to the initial temperature of the sample, and comparing the time-varying temperature pattern during finite lengths of time at the same surface thereof, or at the opposite surface, with that of a known and identically-sized standard subjected to the equivalent conditions. The temperature of said surfaces or opposite surfaces can be monitored during the time the heat or cold pulse, or constant temperature is applied and/or after withdrawal.
Abstract: A plastic identifying apparatus, includes a heating unit, a measuring unit, and a displaying unit. The heating unit heats a plastic object. The measuring unit measures a temperature of the plastic object to generate a measurement result and outputs a result data indicating the measurement result. The displaying unit displays the result data on the plastic object.
Abstract: The present invention is a method of judging whether a substrate is accurately placed at a predetermined position when placing the substrate at the predetermined position on a plate to perform heat treatment or cooling treatment therefor.
Abstract: The invention concerns a method and device for determining the temperature stability of a water-hydrocarbon emulsion capable of phase separation by monitoring the weight variations of a gravimetric sensor part of which is immersed in said mixture. The method consists in a first step of cooling or heating the emulsion to a predetermined temperature; and a second step during which the emulsion is maintained at this temperature, the time-dependent variation curve of said weight in time enabling the determination of the solid mass collected and the separation speed into two phases by determining the slope of this curve, the stability of the emulsion being obtained by comparison with reference emulsions known to be stable.
Type:
Grant
Filed:
November 12, 1999
Date of Patent:
February 19, 2002
Assignee:
Elf Antar France
Inventors:
Yan Faure, Jean-Marie Letoffe, Philippe Schulz
Abstract: The use of TRIR as an inspection method in composite manufacture and in embedded-sensor concepts is disclosed. Detection methods using time-resolved microwave thermoreflectometry and time-resolved shearography with TRIR are also disclosed.
Type:
Application
Filed:
August 16, 2001
Publication date:
February 14, 2002
Inventors:
John C. Murphy, Jane W.M. Spicer, Robert Osiander