567 results about "Core temperature" patented technology

A combination of a patient core temperature sensor and the dual-wavelength optical sensors in an ear probe or a body surface probe improves performance and allows for accurate computation of various vital signs from the photo-plethysmographic signal, such as arterial blood oxygenation (pulse oximetry), blood pressure, and others. A core body temperature is measured by two sensors, where the first contact sensor positioned on a resilient ear plug and the second sensor is on the external portion of the probe. The ear plug changes it's geometry after being inserted into an ear canal and compress both the first temperature sensor and the optical assembly against ear canal walls. The second temperature sensor provides a reference signal to a heater that is warmed up close to the body core temperature. The heater is connected to a common heat equalizer for the temperature sensor and the pulse oximeter. Temperature of the heat equalizer enhances the tissue perfusion to improve the optical sensors response. A pilot light is conducted to the ear canal via a contact illuminator, while a light transparent ear plug conducts the reflected lights back to the light detector.

A method and apparatus for controlling power consumption of a facility, building or simply a collection of one or more devices, by load shedding when power consumption is above, or is predicted to be above, a preselected setpoint, but only if electrical power on the spot market cannot be purchased at or below a preselected price. The apparatus and method of the invention optimizes power usage by taking advantage of the buying of electricity as a commodity on the spot market. As a further aspect of the invention, in the situation of a supermarket for example, which refrigerates food products, artificial product core temperature sensors or direct insertion product sensors can be used to continuously monitor the refrigerated temperature of perishable products. A controller would constantly monitor these temperatures to allow a precise load shedding routine to be implemented.

A packer or bridge plug uses a sealing element made from a shape memory polymer (SMP). The packer element receives heat or other stimulus to soften the SMP while the element is compressed and retained. While so retained, the heat or other stimulus is removed to allow the SMP to get stiff so that it effectively seals a surrounding tubular. High expansion rates are possible as the softness of the material under thermal input allows it to be reshaped to the surrounding tubular or to the surrounding open hole from a smaller size during run in and to effectively retain a sealed configuration after getting stiff on reduction in its core temperature while longitudinally compressed. The SMP or equivalent material whose modulus is changeable can be covered on the outside, the inside or both with an elastic material that protects the SMP and enhances the seal in the wellbore and against the mandrel.

Systems and methods for accurate temperature modification of a patient, or selected regions thereof, including inducing hypothermia. The temperature modification is accomplished using an in-dwelling heat exchange catheter within which a fluid heat exchange medium circulates. A heat exchange cassette attached to the circulatory flow lines of the catheter, the heat exchange cassette being sized to engage a cavity within a control unit. A temperature measurement scheme for obtaining body core temperature is provided, including methods of obtaining and analyzing temperature data to provide feedback to the control unit for use in controlling the heating and cooling of the heat exchange medium so as to heat or cool a patient to a desired target temperature.

An approach to noninvasively, remotely and accurately detect core body temperature in a warm-blooded subject, human or animal, via thermal imaging. Preferred features such as the use of in-frame temperature references, specific anatomical target regions and a physiological heat transfer model help the present invention to overcome pitfalls inherent with existing thermal imaging techniques applied to physiological screening applications. This invention provides the ability to noninvasively, remotely and rapidly screen for diseases or conditions that are characterized by changes in core body temperature. One human application of this invention is the remote screening for severe acute respiratory syndrome (SARS), since fever is a common, early symptom. Other diseases and conditions that affect the core body temperature of humans or animals may also be noninvasively and remotely detected with this invention.

A temperature sensing device including at least a first contact type temperature sensing element determines body core temperature of a warm blooded animal or human based on an estimated skin temperature of the patient which is computed based on temperature measurements obtained by the first sensing element.

The electrical measuring apparatus (17) and temperature sensing apparatus minimises the number of connections required for each contact (30, 31) of a battery (18). The present invention measures the core temperature of the battery (18) which is useful in monitoring the health of the battery (18). The apparatus comprises first connection means to connect to the first contact (30) of the battery (18) and second connection means to connect to the second contact (31) of the battery (18). The apparatus includes a thermistor (36) which connects in series with one lead (32) of the connecting means. Accordingly, the apparatus does not require the temperature sensor (36) to be independently connected to the battery (18).

A method of determining a temperature of a patient includes measuring a first temperature of the patient with a temperature device without contacting the patient with the device, and measuring a second temperature of the patient by contacting a measurement site of the patient with the device. The method also includes determining a temperature value indicative of a core temperature of the patient based on the first and second temperatures.

A passive microwave thermography apparatus uses passive microwave antennas designed for operation, for example, at WARC protected frequencies of 1.400 to 1.427 GHz and 2.690 to 2.70 GHz (for core body gradient temperature measurement) and 10.68 to 10.700 GHz or higher microwave frequency (for surface body gradient temperature measurement) and a related directional antenna or antenna array to measure microwave radiation emanating from an animal, especially, a human body. The antennae may be radially directed toward a point within or on the surface of a human body for comparison with known temperature distribution data for that point and a given ambient temperature. Each frequency band may provide a plurality of adjacent noise measuring channels for measuring microwave noise naturally emitted by the human body. The apparatus measures short-term changes in, for example, core and body surface temperatures to establish a basal metabolic rate. Changes in core body temperature may be stimulated by the administration of food or certain organic and drug-related substances or stress to induce a change in basal metabolic rate over time. These changes correlate directly with a human subject's metabolism rate at rest and under certain dietary constraints and can be used to determine courses of treatment for obesity, metabolic disease, and other disorders. The apparatus can also be used to remotely monitor patients and subjects without physical contact.

A measuring system and method for the contactless and continuous determination of the body core temperature of a person/subject preferably includes a matrix-like infrared sensor (3) that is directed toward the nose-side area of the canthus. The infrared sensor (3) is connected with an evaluating unit (5) for the evaluation of the infrared signals and the selection of the maximum in the matrix. The evaluating unit (5) is connected with a computing unit (6) for the calculation of the body core temperature from the maximum determined and for displaying via a display (7) and/or transmission of the measured signals and/or the calculated value for the body core temperature.

A hydration monitor includes a temperature sensor (20; 65) for measuring a subject's core body temperature and a processor (30). The processor is arranged to accept measurements from the temperature sensor (20; 65) and calculate a hydration level in dependence on changes in the measured core body temperature.

The present invention provides a system, method and apparatus for reducing a vehicle driver's core temperature to offset drowsiness. In one embodiment, a temperature sensor records data describing a vehicle driver core temperature and communicates the data describing the vehicle driver core temperature to a temperature regulator. The temperature regulator determines whether the vehicle driver core temperature is similar to one or more circadian temperatures associated with wakefulness. If the vehicle driver core temperature is similar to a circadian temperature associated with sleep, the temperature regulator reduces the vehicle driver core temperature. In an embodiment the temperature regulator cools a material physically contacting the venous plexuses or arteriovenous anastomoses to cool the portions of the vehicle driver's anatomy which most efficiently cool the vehicle driver.

The invention discloses a temperature compensation circuit used for an avalanche photodiode (APD), which comprises a high-precision temperature sensing module, an APD bias control unit and an APD optical detection module, wherein the high-precision temperature sensing module is used for converting a tube core temperature of the APD into an analog voltage signal, an input end of the high-precisiontemperature sensing module is connected with the APD optical detection module, and an output end of the high-precision temperature sensing module is connected with the APD bias control unit; the APD bias control unit is used for converting the voltage signal output by the high-precision temperature sensing module into a bias signal for controlling the APD; and the APD optical detection module is used for feeding back the tube core temperature and making the gain of the APD constant under the control of the bias signal, an input end of the APD optical detection module is connected with the APDbias control unit, and an output end of the APD optical detection module is connected with the high-precision temperature sensing module. The practical high-precision APD bias controlled temperature compensation circuit is designed by using the APD bias control unit consisting of high-voltage controllers and related auxiliary circuit modules, the constant gain working temperature range of the APDis between zero and 50 DEG C, and the gain control precision is higher than 0.5 percent.

A medical, electrically powered thermal cover for fitting predominantly the trunk and head of a person experiencing or potentially experiencing traumatic or cold-exposure hypothermia. The thermal cover encases all of the torso and neck, and portions of other body areas. Heating may be distinctly non-uniform, being applied to the body surface only in special regions where the body's capacity for heat uptake may be relatively high. In sum, the system may monitor deep body core temperature, direct heat to the body core where it may be most needed, and controls therapy over time to restore normothermia.

The tightly closed space of the stator consists of the stator chassis, the non-magnetic stainless steel isolated sleeve, the tightly closed end cap and the pressuring ring. The cooling loop consists of the liquid-lead groove between the stator core sections, the stator winding/ stator end winding, the stator vaporizing space and the air condenser (AC). Via the gas entering tube and the liquid returning tube, AC connects to the stator chassis to form a main cooling circle loop. The heat produced due to the consumption of the stator components transfers to the vaporization cooling media (VCM) to raise its temperature. When the temperature reaches the saturation value based on inner pressure, VCM in the capacitor vaporize and occur phase-changing decalescence, then cool down by AC and finally liquidize. The invention causes stator core temperature distributing evenly. Features are: safe and reliable, simple structure, small volume, and large power density.

The invention discloses a control device and method for implementing optical module wavelength lock, wherein the apparatus includes: a laser tube core temperature control unit, for obtaining a feedback signal of laser build-in negative temperature coefficient thermistor, and comparing the feedback signal with a presetting signal to generate a control signal inputted to a laser build-in thermoelectric cooler; a wavelength autocontrol unit, for detecting laser output optical signal, and obtaining a wavelength deviation signal for implementing wavelength lock; a superpose unit, for superposing the wavelength deviation signal onto the presetting signal and sending to the laser tube core temperature control unit. The invention overcomes the defect of large offset of optical module output wavelength, and resolves the problem of neighboring channel signal crosstalk of the DWDM system.

A system, device and method monitoring whether a core temperature of a warm-blooded pet animal is within a normal range for the pet animal comprises a sensing assembly including (i) a skin temperature sensor positioned such that a sensing surface of the skin temperature sensor faces the animal, the skin temperature sensor configured to produce a skin temperature output, (ii) an ambient temperature sensor spaced away from the animal and configured to produce an ambient temperature output, and (iii) an accelerometer for sensing an acceleration of the pet animal and producing an acceleration output; and a processor for receiving the outputs, calculating an activity level from the acceleration data and determining whether the core temperature of the pet animal is within the normal range based on a pre-defined function relating the skin temperature T_S, the ambient temperature T_A, and the activity level of the pet animal.

To rapidly induce hypothermia to a patient, in the event the patient has a stroke, hyperthermia or some other temperature related heath problems which requires prompt action to regulate the temperature of the patient, a flat flexible structure conformable to the body of the patient is placed into contact with the patient. The structure has at least two heat transfer portions. One of heat transfer portions is positioned in contact with the body of the patient. The structure is hermetically sealed and a fluidized medium responsive to temperature change is provided in the structure between the heat transfer portions. The fluid is changeable between a liquid state and a gaseous state, when it is exposed to heat and cold. The heat absorbed by the heat transfer portion in contact with the patient is carried by the fluidized medium, as latent heat in the gas that results when the liquid is vaporized to its gaseous state, to the heat transfer portion layer not in contact with the patient, so that the latent heat in the gaseous vapor is dissipated. Upon dissipation, the gaseous vapor is condensed and the fluidized medium returns to its liquid state. The structure may be formed from a flat flexible heat pipe and may also be configured as a rib cage shaped jacket to embrace the torso of the patient. A cooling circuit or mechanism may be added to the structure to facilitate the removal of heat therefrom. The structure may also be used to raise the core temperature of a patient.

The invention relates to anhydrous bituminous products containing one or several specific additives which make it possible to substantially reduce a temperature for producing aggregate and bituminous product mixtures in such a way that it ranges from 20 to 40° C., wherein the temperature of the aggregate and the bituminous product mixture during spreading ranges from 10 to 40° C. and the temperature in the core of the aggregate and bituminous product mixtures during compacting can be raised to 50° C. without degrading the standardized properties of the bituminous product and the bituminous product and aggregate mixture and ensuring the process continuity from transport to compacting according to the state of the art. The inventive aggregate and bituminous product mixtures are particularly suitable for tightening, building and servicing road surfaces, pavements and airfield runways.

The invention provides a human body heat source recognition method and device and equipment having the device. The human body heat source recognition method comprises an image acquisition step which is used for acquiring a thermal infrared image through an infrared human sensing detector arranged in an area to be detected; and a heat source analysis step which is used for analyzing the heat source in the acquired thermal infrared image and determining the heat source as a human body heat source when the heat source characteristics in the thermal infrared image meet the preset conditions, wherein the preset conditions include that the temperature of the heat source is greater than or equal to the lower limit value of normal human body temperature and less than or equal to the upper limit value of the normal human body temperature, and the difference value of the heat source core temperature and the background temperature is greater than or equal to a preset temperature difference threshold. According to the technical scheme, the human body heat source can be accurately recognized, the human body position is monitored in real time and the recognition accuracy is high so that the position information of the human body heat source can be accurately fed back and the human body heat source area is constantly maintained to have great comfort level experience effect.