862results about How to "Accurate temperature measurement" patented technology

Embodiments of the present invention provide an irrigated ablation electrode assembly for use with an irrigated catheter device comprises at least one passageway for a fluid with an outlet disposed at an external surface of the electrode assembly; a permanent magnet; a shield separating the permanent magnet from the at least one passageway and from an exterior, the shield being substantially less oxidizable than the permanent magnet; and an electrode having an external electrode surface. A catheter guidance control and imaging system drives the permanent magnet to guide and control the catheter tip. In specific embodiments, the irrigation fluid flow paths through the electrode assembly are thermally insulated from the electrode and temperature sensor. The irrigation fluid is directed at target areas where coagulation is more likely to occur. One or more monitoring electrodes are provided for mapping or other monitoring functions.

A device for measuring parameters of medical fluids having a measurement chamber through which the fluid to be measured passes. The chamber is sealed on one side by a flexible membrane, and it also has a measurement plate that has a peripheral seal on its outer edge and is in contact with the flexible membrane. At least one sensor for measuring a parameter of the medical fluid is mounted on the measurement plate, and the measurement plate has a continuous inlet leading to the flexible membrane so that a vacuum can be established between the measurement plate and the flexible membrane.

Disclosed is a preferred mold design for producing plastic, molded preforms, which may be blow-molded into a container of a final, desired shape. A preferred mold includes a temperature control system for maintaining the preform mold at a desired temperature. The temperature control system can pass fluid through channels within the preform mold to cool plastic that is injected into the preform mold. In some arrangements, a mold comprises a neck finish mold, the neck finish mold comprising high heat transfer material positioned to transfer heat away from melt within a mold cavity of the mold.

The present invention relates to a sensor or the like having a structure that enables accurate temperature measurement in a wide temperature range including a low-temperature region and is suitable for independently and accurately determining temperature variations and strains appearing in an object to be measured. The sensor comprises a laser light source, a sensor section that has a plurality of waveguides transmitting a laser light from the laser light source therethrough, a detecting section, and an analyzing section. The detecting section detects a plurality of Brillouin spectra obtained from the sensor section. The analyzing section determines at least one measurement value of a temperature in the sensor section and a strain generated in the sensor section, based on fluctuations of parameters defining the respective detected Brillouin spectra. In particular, the sensor section has a structure such that the variation of the Brillouin spectrum in response to a disturbance differs between the waveguides. Thus, by simultaneously monitoring the Brillouin spectra that varying a different manner in a plurality of waveguides, it is possible not only to measure accurately the temperature in a wide temperature range including a low-temperature region, but also to make distinction between the strain and temperature.

A vortex flow pickup serves for measuring mass flow, volume flow or flow velocity of a fluid which is flowing in a measuring tube having a tube wall, and has a temperature sensor arranged in such a way that the vortex flow pickup may also be used together with those fluids which corrode the temperature sensor. A bluff body which produces vortices, and consequently pressure fluctuations, is arranged in the measuring tube. A vortex sensor responding to these pressure fluctuations is fitted downstream of the bluff body in a bore of the tube wall of the measuring tube. The vortex sensor comprises a diaphragm which covers the bore and on which a sensor vane protruding into the fluid is fastened. The temperature sensor is fixed on the bottom of a blind hole of the sensor vane. On the side of the diaphragm lying opposite the sensor vane, a sensor element is fastened. The temperature sensor may alternatively be arranged in a longitudinal bore of the bluff body.

A sensor strip comprises an electrode substrate, an electrode set, on the electrode substrate, and a heat conducting layer, on the electrode substrate opposite the electrode set. A sensor instrument for use with this sensor strip comprises a temperature sensor, at a side of a gap for accepting the sensor strip, opposite electrical contacts. The invention provides an accurate determination of the temperature of a sample.

A temperature sensor circuit and system providing accurate readings using a temperature diode whose ideality factor may fall within a determined range. In one set of embodiments a change in diode junction voltage (ΔV_BE) proportional to the temperature of the diode is captured and provided to an ADC, which may perform required signal conditioning functions on ΔV_BE, and provide a numeric value output corresponding to the temperature of the diode. Errors in the measured temperature that might result from using diodes with ideality factors that differ from an expected ideality factor may be eliminated by programming the system to account for differing ideality factors. The gain of the temperature sensor may be matched to the ideality factor of the temperature diode by using an accurate, highly temperature stable reference voltage of the ADC to set the gain of the temperature measurement system. The reference voltage may have a trim capability to change the gain setting voltage by a digital address comprising a determined number of bits, with the programmable range for the reference voltage corresponding to a determined range of ideality factors.

A nonvolatile memory is accessed by a memory control circuit and stores temperature information indicating a temperature measured by a temperature sensor. A power supply control circuit supplies a first power supply voltage to the temperature sensor in response to a request for temperature measurement received via an antenna, and supplies a second power supply voltage to the nonvolatile memory and the memory control circuit after the temperature sensor measures the temperature. While the temperature sensor is measuring the temperature, the nonvolatile memory and the memory control circuit do not operate and thus do not generate heat. Therefore, the temperature sensor can accurately measure the temperature without being influenced from the heat generation caused by the operation of circuits in an RFID transponder.

The embodiment of the invention discloses a method for measuring the temperature of a target object by using a thermal infrared imager. The method comprises the following steps: calibrating the thermal infrared imager by using black bodies to obtain a temperature-gray level curve of the thermal infrared imager; calculating the tweak parameter of an infrared image by using the gray values of images obtained at different shutter temperatures and black body temperatures of the thermal infrared imager; correcting the infrared image of the target object by using the tweak parameter; performing deformation correction on the infrared image; determining the temperature value of the target object according to the gray value of each pixel point of the corrected infrared image and the temperature-gray level curve. According to the method, the influences of environmental factors on infrared temperature measurement are reduced greatly via the correction, and the temperature of a measured object can be measured accurately.

A fiber optic temperature sensor (10) and system employ optical (fiber 34) and a fiber Bragg grating (36) using non-silica materials that can withstand temperature ranges extending well above the silica-imposed limit of 1,100 degrees C. The system measures the wavelength shift of light reflected from the fiber Bragg grating (36) and converts it into a temperature value. Specific optical fibers include sapphire, which can be used at temperatures approaching 1,800 degrees C., and yttria-stabilized zirconia (YSZ), which can be used at temperature in excess of 2,300 degrees C. One specific grating employs alternating layers of YSZ, with the percentage of yttria varying in the alternating layers to achieve the desired difference of refractive index, and another grating employs alternating layers of alumina and zirconia.

According to an aspect of the present invention, there is provided a sintered electroconductive oxide containing a perovskite phase of perovskite-type crystal structure represented by the composition formula: M1_aM2_bM3_cAl_dCr_eO_f where M1 is at least one of elements of group 3A other than La; M2 is at least one of elements of group 2A; M3 is at least one of elements of groups 4A, 5A, 6A, 7A and 8 other than Cr; and a, b, c, d, e and f satisfy the following conditional expressions:

0.600≦a≦1.000;

0≦b≦0.400;

0.150≦c<0.600;

0.400≦d≦0.800;

0<e≦0.050;

0<e/(c+e)≧0.18; and

2.80≦f≦3.30.

With the use of this conductive oxide sintered body, it becomes possible to carry out proper temperature measurements over the temperature range from a low temperature of −40° C. to a high temperature of 900° C. or higher.

The invention discloses a heating roller heating method and a heating roller. The heating roller is heated in an oil, steam, electric or electromagnetic heating manner, and is characterized in that the heating roller has an interlayer structure, a thermally-conductive liquid medium is filled in the interlayer of the heating roller for homogenizing the temperature of the heating roller; and the outer surface of the heating roller is heated in a heat conduction manner through the thermally-conductive liquid medium in the interlayer of the heating roller. The heating roller structure comprises a heating roller with the interface structure, and the thermally-conductive liquid medium in the interface of the heating roller for homogenizing the temperature of the heating roller. The thermally-conductive liquid medium can be heat conducting oil, molten metal such as potassium and sodium, pure water, ethanol-like substance, etc.

An air cleaner is provided in an all terrain vehicle in order to improve the control performance for effecting optimal combustion in an engine by accurately measuring the temperature of air introduced into the engine. The air cleaner includes an air cleaner case disposed behind an engine, a throttle valve disposed between the engine and the air cleaner case, and connecting tube for connecting the air cleaner case and the throttle valve with each other. A temperature sensor is disposed in either a front or rear face of the air cleaner case. Optionally, the temperature sensor is disposed in the connecting tube.

The invention relates to a method for detecting the flow speed and the flow direction of groundwater by using the temperature as a tracer and a measuring device. The invention adopts a linear heat source, voltage is exerted on the linear heat source so that the linear heat source can generate the heat, a plurality of temperature probes are arranged on the same circumference around the heat source at equal intervals, the values and the time of the temperature received by each probe are different under the effect of the water flow, the temperature received by the probes at the downstream of the heat source is higher than that received by the probes at the upstream of the heat source, the values of the received temperature are used for judging the flow direction of the groundwater, the value of the flow speed of the groundwater is relevant with the time of temperature change received by the probes, and the value of the flow speed of the groundwater is calculated through the time duration from the electrification initiation to the measured temperature change.

A method and an apparatus utilized for thermal processing of substrates during semiconductor manufacturing. The method includes heating the substrate to a predetermined temperature using a heating assembly, cooling the substrate to the predetermined temperature using a cooling assembly located such that a thermal conductance region is provided between the heating and cooling assemblies, and adjusting a thermal conductance of the thermal conductance region to aid in heating and cooling of the substrate. The apparatus includes a heating assembly, a cooling assembly located such that a thermal conductance region is provided between the heating and cooling assemblies, and a structure or configuration for adjusting a thermal conductance of the thermal conductance region.

The invention relates to a fiber grating temperature sensor which comprises a probe and a demodulating system connected with the probe, wherein the probe comprises a needle head and a handle which are connected together. The fiber grating temperature sensor is characterized in that the needle head is an austenitic stainless steel round bar with a needle point, the center of the bottom surface at one end of the austenitic stainless steel round bar is provided with a blind hole, and the blind hole extends close to the other end of the austenitic stainless steel round bar; and a fiber bragg grating is arranged in the blind hole. The invention is mainly used for manufacturing fiber grating temperature sensors for microwave thermotherapy of bone tumors.

A heat treatment apparatus for performing prescribed heat treatment to a subject (W) to be treated is provided with a processing chamber in which air can be exhausted; a mounting table arranged in the processing chamber, for placing on an upper plane the subject to be treated; a plurality of thermoelectric conversion elements arranged on an upper part of the mounting table; a light transmitting window for covering a ceiling portion of the processing chamber airtight; and a gas introduction unit for introducing a required gas into the processing chamber. A heating unit which includes a plurality of heating light sources including a semiconductor light emitting element for emitting heating light to the subject to be treated, is provided above the light transmitting window. Thus, heating efficiency is improved and temperature can be increased and reduced at a higher speed for the subject to be treated.