92 results about "Heat flux sensor" patented technology

The invention provides a small-sized long-time heat flow measurement sensor and a measurement method suitable for two inverse problem algorithms. The small-sized long-time heat flow measurement sensor and the measurement method are used for measuring heat flow by using a calibration integral equation method and a space propulsion method. The sensor comprises a shell, a heat insulation material, a heat conduction material, a first thermocouple and a second thermocouple, the shell is of a cylindrical structure with an opening in one end, a cylindrical heat conduction material which is coaxially arranged is arranged in the shell, the first thermocouple and the second thermocouple are arranged between the heat conduction material and the shell, and the collecting ends of the first thermocouple and the second thermocouple are embedded into the heat conduction material; and other areas between the heat conduction material and the shell are filled with a heat insulation material. The sensor is compact in structure and small in size, and can be embedded in a material for measurement. And meanwhile, the sensor has relatively high precision and stability, can accurately output a prediction solution of a measuring point in short-time or long-time measurement, and has a relatively large application range and practicability.

The invention concerns a wearable device configured to be positioned on a user's wrist and comprising: - a case back configured to be at least partially in contact with the user's wrist, - a heat flux sensor (322), configured to measure a heat flux coming from the user's wrist, and - an optical sensor (310) comprising at least one light emission assembly (312) to emit light and at least one light reception assembly (314) to receive light from the light emission assembly (312). Positions of the at least one light emission assembly (312) and the at least one light reception assembly (314) form a geometrical shape (GS) on the case back (210), as projected orthogonally on the case back (210). The heat flux sensor (322) is arranged within the geometrical shape (GS), as projected orthogonally on the case back (210).

The utility model aims to provide the testing device based on the arm model heat flow, which is low in cost, can meet uv-level voltage testing requirements, can realize voltage testing of a plurality of channels, and can improve the testing efficiency. The device comprises an arm model, a heat flux sensor, a temperature sensor, an operational amplifier, an instrumentation amplifier, an analog-to-digital converter and a main control board, the heat flux sensor and the temperature sensor are both mounted on the surface of the arm model, the temperature sensor is mounted on the surface of a product, the temperature sensor is connected with the main control board, and the operational amplifier is connected with the main control board. The heat flux sensor is connected with the input end of the operational amplifier, the operational amplifier increases input impedance, the output end of the operational amplifier is connected with the input end of the instrument amplifier and amplifies and converts signals into differential analog signals, the output end of the instrument amplifier is connected with the 24-bit analog-to-digital converter, and the analog-to-digital converter is connected into an external upper computer through the main control board. The device is applied to the technical field of heat flux testing.

The invention discloses a chromium-doped indium oxide-based high-temperature heat flux sensor and a preparation method thereof, a screen printing technology is adopted, a slurry formula and printing process parameters are optimized, a thermopile structure is accurately formed on a high-temperature-resistant ceramic substrate, and then a thermopile and a thermal resistance layer are subjected to step-by-step high-temperature sintering treatment, so that the chromium-doped indium oxide-based high-temperature heat flux sensor is obtained. And firm combination between the thin film and the substrate and densification of a microstructure are ensured. The finally prepared sensor has excellent high-temperature oxidation resistance and long-term working stability, is stable and reliable in thermoelectric output signal, meets the strict requirements of aerospace, energy power and other fields on high-temperature heat flow measurement, is suitable for heat flow monitoring in high-temperature combustion environments, high-speed pneumatic heating and other scenes, and has wide application prospects. And a reliable test means is provided for design and performance evaluation of the thermal protection system in an extreme environment.

A wearable device configured to be positioned on a user's wrist, includes a case back configured to be at least partially in contact with the user's wrist, a heat flux sensor, configured to measure a heat flux coming from the user's wrist, and an optical sensor including at least one light emission assembly to emit light and at least one light reception assembly to receive light from the light emission assembly. Positions of each of the at least one light emission assembly and each of the at least one light reception assembly form a geometrical shape on the case back, as projected orthogonally on the case back. The heat flux sensor is arranged within the geometrical shape, as projected orthogonally on the case back.

[Object] To provide a Peltier element with an ultra-low thermal resistance heat flux sensor that is capable of detecting heat flow passing through the Peltier element at high speed and has negligible thermal resistance.[Solving Means] It has a structure in which an anomalous Nernst heat flux sensor 20 is formed directly on one or both of an upper part and a lower part of an insulating board that forms a Peltier element 10. The present invention is favorably characterized in that each fine line (22a) of a thermoelectric generator is formed of a magnetic material having residual magnetization even in absence of an external magnetic field and is magnetized in a direction orthogonal to a length direction of the fine line, and each fine line (23a) of a connector is formed of a ferromagnetic material that is magnetized in a direction opposite to a direction in which each fine line (22a) is magnetized, a magnetic material having a Nernst coefficient with an opposite sign to that of each fine line (22a), or a non-magnetic material.

A heat flux sensor device (100) comprising a semiconductor substrate layer (104) and a cap layer (102) that has a substrate-facing side (106) and a reception side (108). The cap layer (102) is bonded on the substrate-facing side (106) to the substrate layer (104), and the substrate layer (104) and the cap layer (102) together defining a first cavity (116). A first thermal sensor element (120, 122) is disposed within the first cavity (116) and configured to translate thermal energy proportional to a temperature difference between the cap layer (102) and the substrate layer (104) into first electrical energy. Signal processing circuitry is provided operably coupled to the first thermal sensor element (120, 122) and configured to use the first electrical energy generated by the first thermal sensor element (120, 122) to measure a heat flux flowing from the cap layer (102) to the substrate layer (104). The first cavity (116) is opaque to infrared electromagnetic radiation incident from the reception side (108) of the cap layer (102).

The invention relates to the technical field of thermoelectric effect and heat flux density detection, and discloses an atomic layer thermopile heat flux sensor with water cooling and preparation and assembly methods, the heat flux sensor comprises a sensor chip and a cooling assembly, the bottom layer of the sensor chip is a substrate layer with the 001 crystal face beveled by 15 degrees, and the bottom layer of the sensor chip is a substrate layer with the 001 crystal face beveled by 15 degrees. A layered heat flow sensitive film on the substrate is a YBa2Cu3O7-delta film grown through pulse laser deposition, and double-layer metal electrodes are prepared at the two ends of the surface of the YBa2Cu3O7-delta film; and the cooling assembly is used for carrying out water cooling on the sensor chip and packaging the sensor chip. According to the invention, a YBa2Cu3O7-delta thin film with a large inclination angle is prepared on a single crystal lanthanum aluminate LaAlO3 substrate which is beveled by 15 degrees; the high-temperature-resistant Ni / Pt and Ni / W double-layer electrode is prepared on the surface of the YBa2Cu3O7-delta thin film, annealing is carried out, the contact strength of the YBa2Cu3O7-delta thin film and an electrode material is improved, the contact resistance is reduced, and the electric signal strength is improved; the cooling assembly improves the stability of the device in a large-heat-flow and long-time working scene.

The invention relates to the technical field of material testing, in particular to a material ablation test system and method, and the system comprises an oxygen supply subsystem, an acetylene supply subsystem, a combustor measurement and control subsystem, a sample measurement and control subsystem, a test platform and control equipment; wherein the test platform is provided with a first slide rail, a scale belt, a sample storage box and a sample collection box in the sample measurement and control subsystem, a positioning slide block in the combustor measurement and control subsystem, and a sample clamping seat in the sample measurement and control subsystem, which are respectively connected with the first slide rail in a sliding manner; an oxyacetylene premixing chamber, a distance measuring and temperature measuring instrument and an oxyacetylene combustion nozzle in the combustor measurement and control subsystem are arranged on a positioning sliding block, an oxygen supply subsystem and an acetylene supply subsystem are respectively connected with the oxyacetylene premixing chamber, and a temperature sensor and a heat flow sensor in the sample measurement and control subsystem are respectively connected with a sample clamping seat; according to the invention, the accuracy of the material ablation test result is improved.

The present application relates to a kind of ion polymer-based thermoelectric pile heat flux sensor device, the thermoelectric pile heat flux sensor includes in turn: first protective layer, first connecting circuit, thermal resistance layer, thermoelectric element, second connecting circuit and second protective layer, wherein the thermoelectric element is embedded in the thermal resistance layer and is made of ion conductor with free ion as main carrier. Since ion conductor has huge thermoelectric potential, only a few pairs of ion thermoelectric column need to be integrated to obtain the required thermoelectric voltage with the required sensitivity.

The invention belongs to the technical field of intelligent manufacturing and industrial automation, and discloses a lithium electric lifting appliance battery life cycle management and digital twin system and parameter self-adaption method. The system comprises a battery state sensing module, an electrolyte phase change feature extraction module, a parameter adaptive remapping engine, a digital twin model synchronization module and a state-of-charge dynamic calibration module. Through integration of a micro heat flux sensor and current ripple detection, direct physical quantity measurement of the electrolyte phase change process is realized, and the limitation that a traditional method depends on terminal voltage indirect estimation is broken through; a parameter dynamic remapping mechanism based on phase change characteristic signal triggering is constructed, and SoC calibration response time is greatly shortened from tens of minutes of a traditional method.

The present invention discloses a thin-film heat flux sensor based on temperature measurement using a two-color thermosensitive phosphorescent coating, which mainly solves technical problems such as low sensitivity and poor environmental adaptability of existing heat flux sensors. The heat flux sensor includes an excitation light source, a bundled optical fiber, a heat flux probe, a photoelectric detection unit, and a signal acquisition unit. The excitation light enters the heat flux probe through the bundled optical fiber, and after passing through a collecting lens and a coating substrate, it irradiates the two-color thermosensitive phosphorescent coating, thereby prompting the two-color thermosensitive phosphorescent coating to emit a phosphorescent signal; at the same time, the light-absorbing coating causes a temperature change due to the absorption of heat flux, and transmits this temperature to the two-color thermosensitive phosphorescent coating. The spectrum of the phosphorescent signal changes due to the change in the temperature of the two-color thermosensitive phosphorescent coating, and then the light signal returns to the photoelectric detection unit, which converts the light signal into an electrical signal, which is then collected by the signal acquisition unit, thereby achieving heat flux measurement.

Provided is a technique capable of quickly controlling the temperature of a substrate or a substrate support. The substrate support includes: a susceptor including a flow path for a temperature control medium to flow; a support portion disposed on the susceptor, the support portion including a front surface that supports a substrate and a back surface; and a heat flux sensor disposed on the back surface of the support portion.

The application discloses a sheet type integrated platinum film heat flow sensor for a hypersonic shock tunnel, which comprises a glass substrate in a sheet shape, a plurality of platinum thin film lines arranged on the surface of the glass substrate along the width direction of the glass substrate, and silver paste contacts corresponding to the platinum thin film lines arranged on the side edges of the glass substrate and electrically connected with the platinum thin film lines, wherein the end of the silver paste contact away from the platinum thin film line is used for welding a lead wire. The sheet type integrated platinum thin film line resistance sensor has the characteristics of high frequency response of a two-millimeter-diameter thin film sensor. After the thickness of the glass substrate as a sensor bearing substrate is reduced, the sensor can be applied to a particularly thin part of an aircraft for heat measurement, and a measurement point with a gradient range is formed on the glass substrate, so that the aerodynamic heat of the aircraft surface with a certain gradient can be measured.

The present application relates to a kind of embedded film thermocouple array heat flow sensor for slab continuous casting crystallizer and on-line monitoring method, belong to continuous casting process detection technical field.Sensor includes flexible insulating substrate, thin film thermocouple array being arranged on the surface of flexible insulating substrate, lead electrode being connected with thin film thermocouple array, and protective packaging layer for covering thin film thermocouple array.Monitoring method includes, calibrating sensor is embedded in crystallizer copper plate hot face, real-time acquisition potential signal output by each subunit of thin film thermocouple array;Local heat flow density at each thermocouple subunit is calculated, and the instantaneous heat flow distribution cloud picture of crystallizer copper plate surface is reconstructed by interpolation method;When local heat flow density exceeds preset threshold or heat flow fluctuation amplitude exceeds set range, prewarning signal is sent.The present application realizes the in-situ, direct measurement of crystallizer hot face heat flow, response speed is fast, can realize transient heat flow measurement and the fine measurement of local heat flow distribution.

The present invention discloses a flexible deformable heat flux sensor, comprising a flexible substrate, a pin group is arranged at one end of the flexible substrate, a metal measuring point group is arranged on the surface of the flexible substrate away from the pin group, the pin group is electrically connected to the metal measuring point group through a wire arranged in the flexible substrate; wherein two adjacent pins in the pin group are connected in series with a metal measuring point in the metal measuring point group through a wire, and its preparation device comprises an injection molding mold and a wire clamping assembly arranged on one side of the injection molding mold; a cavity is arranged inside the injection molding mold, and a metal measuring point molding seat is arranged near the end of the cavity away from the wire clamping assembly; ports for injecting material into the cavity are arranged at the top and bottom of the injection molding mold; and the wire clamping assembly is used to clamp the wire placed in the cavity. The present invention solves the problem of measuring the surface heat flux rate of complex surface models. The heat flux sensor has a flexible substrate, which not only makes the installation of the sensor more convenient, and the measuring end face and the model surface completely overlap, but also increases the density of the measuring points, and more clearly obtains the heat flux distribution of the model surface.

To provide a wheel bearing device capable of early detecting signs of abnormality occurring in a wheel bearing.SOLUTION: A wheel bearing device 1a comprises a fixing member 120, a rotary member 121 rotatable relative to the fixing member 120, a rolling element 5 arranged between the fixing member 120 and the rotary member 121, a heat flux sensor 60, and a sensor case 70. The sensor case 70 is inserted into a through hole 13 provided in one of the fixing member 120 and the rotary member 121. The heat flux sensor 60 is attached to the sensor case 70.SELECTED DRAWING: Figure 4

The present disclosure provides a core temperature sensing assembly for measuring a core temperature of an object when positioned on a surface of the object. The sensing assembly uses a heat flux sens

An electronic device may include a housing and an ambient temperature sensor in the housing. The ambient temperature sensor may include a temperature sensor, a heat flux sensor, and a heat source. The heat source may heat the heat flux sensor, and an ambient temperature may be determined based on measurements from the temperature sensor and the heat flux sensor. If additional temperature sensors and / or heat flux sensors are included in the ambient temperature sensor, the ambient temperature may be determined directly based on heat flux and temperature differences between the sensors. Alternatively, the heat flux sensor may measure a rise in heat flux, and control circuitry may fit a convection coefficient to the rise in the heat flux. The ambient temperature may then be determined based on the convection coefficient. Instead of heating the heat flux sensor, the heat flux sensor may be cooled to determine the ambient temperature.

The invention relates to a high-frequency-response high-temperature heat flux sensor for a flight test, which is characterized in that the type of a thermocouple is selected according to the maximum value of the surface temperature of an aircraft in the flight process, a heat transfer element is of a cylindrical structure, the end part is polished and ground, and two mounting through holes are symmetrically formed in the same distance from the center line of the cylindrical structure; positive and negative electrodes of the thermocouple are processed into wires with corresponding diameters and are fixed in the two mounting through holes of the heat transfer element, and one ends of the two electrodes are flush with the end surface of the heat transfer element; the end face of the heat transfer element provided with the thermocouple is sequentially plated with a copper film and a silicon dioxide film in a magnetron sputtering mode, and the high-frequency response characteristic of the heat flow sensor is achieved. The coated heat transfer element is fixed in the high-temperature alloy packaging shell, the tail parts of the positive electrode and the negative electrode of the thermocouple are welded with the compensating leads with the same polarity, and a cavity in the tail part of the high-temperature alloy packaging shell is filled with high-temperature glue. The sensor has the advantages of being small in size, resistant to temperature and high in frequency response.

A heat flux sensor for sensing a heat flux of a target entity. The heat flux sensor comprises: a probe configured to make an electrical connection with a surface of the target entity, the probe comprising first and second probe members which each make an electrical connection with said surface, the first and second probe members defining therebetween a sensing area of said surface; a pulse generator configured to produce a periodic electric signal and supply the electric signal to the target entity via the probe; a controller configured to: determine a current of the electric signal; determine a voltage of the electric signal; determine a frequency of the electric signal; determine a measure of heat flux of said sensing area based on a change in said current, a change in said voltage and the frequency of the electric signal.

This invention relates to the field of aircraft fire resistance testing technology, and discloses a device, system, and method for acquiring the surface heat flux density of a fire-resistant test specimen. The system initialization includes: total heat flux measurement (obtaining the theoretical total heat flux value q0); actual pure radiative heat measurement (setting a glass cover around the heat flux sensor without changing its position, shielding convective heat through the glass cover, and then collecting the theoretical radiative heat flux value q1 measured by the heat flux sensor); and multiplying the pre-measured emissivity of the test specimen surface by the theoretical radiative heat flux value q1 to obtain the actual pure radiative heat flux value q. r Actual heat flux calculation: Actual convective heat value q c The actual heat flux q is obtained by subtracting the theoretical radiative heat flux q1 from the theoretical heat flux q0. a Equal to the actual pure radiative heat flux value q r and actual convective heat value q c The sum of radiative heat and convective heat is achieved through precise measurement of these two heat sources under actual aircraft fire conditions, providing high-fidelity, multi-scenario, and highly consistent thermal flow data for twin experiments.

The invention discloses a heat flux density measurement system for a closed environment, and belongs to the field of measurement of heat damage parameters in explosion fireballs of combustion damage weapons. Comprising a total heat flow density sensor, a protective baffle, a mounting plate, a sealing gasket, a mounting cylinder, a cold water pipe, a hot water pipe, a circulating booster water pump, a flowmeter, a manual ball valve, a water tank, a temperature thermocouple, a signal acquisition and control line and a signal acquisition and control system. The total heat flux sensor is subjected to effective anti-fragment protection through a protection baffle with a large front part and a small rear part, and the rear end of the total heat flux sensor is connected with a circulating water cooling system capable of being remotely controlled, so that the total heat flux sensor is effectively cooled; the long-term reliable work of the sensor under the condition of high heat flux in a combustion damaged weapon explosion fireball is ensured; the device can be conveniently installed in a container or a closed / semi-closed tunnel, can also be fixed outside a fireball, is synchronously suitable for measuring the internal / external heat flux density in the explosion fireball, and meets the thermal damage effect test requirements of combustion damaged weapons under different test conditions.

The invention relates to the field of temperature measurement and heat measurement and can be used for the remote detection of icing. A method for determining the phase transition temperature and volume of a sample of liquid includes determining and stabilizing the starting temperature of a contact surface, and subsequently cooling said surface at a constant rate while taking readings from a temperature sensor and a heat flux sensor. The transition phase temperature in the cooling step is determined on the basis of an abrupt change in the temperature of the crystallizing sample. The crystallization end point is determined on the basis of a change in the heat flux. The contact surface is then heated to its starting temperature with readings being taken from the temperature sensor and the heat flux sensor, and the phase transition temperature in the step of heating the crystallized sample is determined on the basis of a change in the slope of the temperature-time curve at the point when the sample stops melting. The mass of the sample is determined on the basis of the heat flux-time curve. The result is more accurate measurement of both the phase transition temperature and the quantitative characteristics of the sample.

Various non-invasive sensors are adapted to be placed on a surface of an object having a volume with an internal region. The internal region of the object has internal properties indicated by corresponding internal parameters and an internal temperature distribution that is a function of the internal parameters and surface thermal signals. Each non-invasive sensor includes a heat flux sensor having one or more heat flux sensor output terminals to provide a measured heat transfer signal for the surface of the object, and a temperature sensor having one or more temperature sensor output terminals to provide a measured temperature signal for the surface of the object. Systems including one or more of the sensors perform non-invasive sensing of the object including accurate and rapid determination of an internal temperature distribution of the internal region of the object as well as one or more other internal properties of the object.

The present disclosure relates to systems and methods for temperature sensing using thermopiles integrated with flexible circuits. Robust estimation of temperature both within and outside of a device can be achieved using one or more absolute temperature sensors optionally in conjunction with thermopile heat flux sensors. A thermopile temperature sensing system can measure a temperature gradient across two locations within the device to estimate absolute temperature at impractical locations for measurement using absolute temperature sensors. Using a heat flux model associated with the device, the thermopile temperature sensing system can be used to estimate a temperature associated with an object in contact with an outer surface of the device, such as a user's skin temperature. Additionally, the thermopile temperature sensing system can be used to estimate an ambient air temperature. Within the device, temperature measurements from the thermopile temperature sensors can be used to compensate sensor measurements, such as when the accuracy or reliability of a sensor varies with temperature.

The application discloses a methanol reforming hydrogen micro-reactor and a control method, relates to the technical field of hydrogen energy, and comprises a reformer body, a catalyst and a burner. The parallel U-shaped rotary segments of the application span above a plurality of parallel combustion channels. Such a layout enables the methanol steam reforming reaction to uniformly absorb heat from the entire burner plane, rather than only absorbing heat from a local heat source, greatly improving the temperature uniformity of the reactor in the vertical and horizontal directions, effectively eliminating hot spots and cold spots, and controlling the method based on a heat contribution matrix and an ideal heat flux density curve. The method realizes precise regulation and control of the heat flux density as the core index at the micro-reactor level, directly acquires the spatial heat distribution through a heat flux sensor array, dynamically adjusts the fuel supply of each combustion channel, enables the energy input to be real-time and accurate, matches the dynamic demand of the reaction process, realizes on-demand heating, and significantly improves the system thermal efficiency.

Provided is a Peltier element with an ultra-low thermal resistance heat flux sensor that is capable of detecting heat flow passing through the Peltier element at high speed and has negligible thermal resistance. It has a structure in which an anomalous Nernst heat flux sensor is formed directly on one or both of an upper part and a lower part of an insulating board that forms a Peltier element.

A calorie estimation apparatus for automatically tracking a user's consumed calories comprises; a main body having a contact site configured to be placed against a user's skin; a heat flux sensor arranged at the contact site and configured to provide a signal indicative of a signed heat transfer rate per unit area between the user's skin and the main body at the contact site; one or more auxiliary sensors each sensor configured to provide auxiliary sensor data indicative of at least one of: environmental conditions, user behaviour, or user state; and a processing unit configured to receive the signed heat transfer rate per unit area and the auxiliary sensor data, detect, based on the auxiliary-sensor data, one or more periods of caloric consumption and / or heat-affecting conditions unrelated to caloric consumption, and, in response to detecting a period of caloric consumption, determine changes in the signed heat transfer rate per unit area before, during, and after the detected period of caloric consumption, and estimate calories consumed based on the determined changes.