63 results about "Heat pulse" patented technology

The invention discloses a pet wearable vital sign monitoring method based on a flexible sensor, which comprises the following steps: constructing a flexible multi-mode sensing interface, embedding a sensing layer into a fitting layer and fixing the sensing layer at the neck or chest position of a pet; a low-power thermal pulse is output to detect the contact characteristic, and a stable fitting interface is formed; multi-mode signals are collected and synchronously corrected, and filtering and baseline processing are executed to obtain a processed signal set; multi-modal features are extracted, a physical tensor is constructed, and vital sign parameters are calculated; body temperature, heart rate and respiratory rhythm components are extracted, a rhythm resonance curve is generated, and target configuration parameters are determined; sampling and communication are adjusted according to the target configuration, and an alarm is triggered and uploaded to a remote terminal when abnormity occurs. According to the pet vital sign monitoring system, high-precision, low-power-consumption and long-term stable monitoring of pet vital signs is realized by constructing a flexible multi-mode sensing interface and combining a physical consistency driven time sequence reasoning and rhythm energy scheduling mechanism.

The invention belongs to the technical field of environment monitoring, and discloses an underground water environment monitoring system, which comprises a monitoring well body; the packers can be remotely controlled and are arranged in the depth direction of the monitoring well body; the optical fiber array can invert the seepage velocity field of the stratum around the well by applying controlled thermal pulse and monitoring temperature response; the robot flying shuttle can move in the well, and an in-situ chemical analysis module or a geophysical imaging module can be carried on the robot flying shuttle; the artificial intelligence model runs on the remote cloud platform; the artificial intelligence model can fuse multi-source data, takes a seepage field obtained by active detection and a stratum structure obtained by imaging as physical constraints, and can autonomously dispatch a robot shuttle to execute minute-level in-situ chemical diagnosis or scan inter-well strata. According to the invention, the leap from passive observation to active intelligent exploration is realized, and the monitoring precision and timeliness are significantly improved.

The invention provides a battery thermal runaway early warning method for head-mounted children twitch monitoring equipment. The battery thermal runaway early warning method comprises the following steps: acquiring real-time temperature data, current / voltage data and inertial motion data; a thermal pulse feature vector and a thermal-electric-dynamic coupling feature vector are obtained through calculation from the data; processing the thermal pulse feature vector and the thermal-electric-dynamic coupling feature vector through a variable-temperature pulse prediction neural network, and outputting a thermal runaway probability; setting three levels of thermal runaway risk early warning levels in combination with the thermal runaway probability and the key thermal parameters, and executing a corresponding hierarchical response control strategy according to the thermal runaway risk early warning levels; the method focuses on a lightweight deployment environment of wearable equipment, a closed-loop system of pulse feature extraction, thermal-dynamic coupling modeling, deep neural prediction and hierarchical linkage response is constructed by fusing temperature, electrical and inertial multi-mode sensing data, and the thermal mutation recognition and response capability of the head-mounted equipment under a continuous wearing condition is remarkably improved.

Circuits and methods that enable stacking of phase change material (PCM) switches and that accommodate variations in the resistance of the resistive heater(s) of such switches. Stacking is enabled by providing isolation switches for the resistive heater(s) in a PCM switch to reduce parasitic capacitance caused by the proximity of the resistive heater(s) to the PCM region of a PCM switch. Variations in the resistance of the resistive heater(s) of a PCM switch are mitigated or eliminated by sensing the actual resistance of the resistive heater(s) and then determining a suitable adjusted electrical pulse profile for the resistive heater(s) that generates a precise thermal pulse to the PCM region, thereby reliably achieving a desired switch state while extending the life of the resistive heater(s) and the phase-change material.

Systems may include a hot solution supply and a cold solution supply utilizing flow controllers, temperature control units, valve systems, various temperature and pressure sensors, an inspection zone and recirculation systems. A method for thermal management and thermal impulse testing may include configuring a hot and cold solution system and monitoring temperature profiles in each system and alternating the flow of the hot and cold cycles then monitoring the components tested in the inspection zone.

The application discloses a low-temperature starting method and a control system of a fuel cell. The fuel cell comprises a stack. The low-temperature starting method of the fuel cell comprises the following steps: injecting an alternating disturbance signal into the stack when the fuel cell is in a low-temperature state; obtaining impedance information of the stack at multiple characteristic frequencies during the process of injecting the alternating disturbance signal into the stack; obtaining pulse parameters according to the impedance information of the stack at the characteristic frequencies; injecting a heating pulse into the stack according to the pulse parameters; obtaining a current temperature of the fuel cell after injecting the heating pulse into the stack; returning to the step of injecting the alternating disturbance signal into the stack when the fuel cell is in the low-temperature state when the temperature is lower than a preset temperature; and starting the fuel cell when the temperature is greater than or equal to the preset temperature. The method can overcome the inherent defects of local measurement and hysteresis of a temperature sensor, reduce the risks of membrane perforation and catalyst dissolution caused by local overheating, and significantly improve the energy efficiency and safety of low-temperature starting.

This invention discloses a method, system, device, and medium for early warning of hydrogen sulfide concentration based on sedimentary layer metabolic thermal deviation, belonging to the field of sedimentary layer gas monitoring technology. The method includes: sequentially applying a first thermal micro-perturbation and a second thermal micro-perturbation to the physical center of the interface to construct a nonlinear instability coefficient and record the critical deceleration determination time; latching a reference state in response to the physical center of the interface meeting preset evolution conditions and recording the interface structure triggering time; constructing a biological amplification factor based on the reference state by applying isoparametric thermal pulses to determine activity-enhanced interface erosion; applying controlled hydrodynamic pulses to diagnose the reservoir driving type using gradient peak migration characteristics; and outputting a graded early warning based on the reservoir driving type when the causal leading time sequence conditions are met. This invention eliminates pore structure interference through dual-amplitude thermal micro-perturbations, distinguishes the causes of interface erosion through self-referenced causal discrimination, and adaptively identifies the reservoir driving mechanism through dynamic thermal diffusion reference cycle number, thus achieving advanced graded early warning.

The invention discloses an ALD deposition method and an ALD deposition system for a passive film, and the ALD deposition method for the passive film comprises the following steps: S1, chip loading and transmission, S2, preheating, S3, TMA pulse, S4, O3 pulse, S5, loop iteration and film thickness control, and S6, chip taking. S7, raw material gas protection: when a gas pipeline and a gas supply port of the plasma deposition furnace are tightened, sealing is performed through a leakage-proof system, leaked gas is adsorbed into a waste gas recovery box to be stored, and raw material supply is stopped during leakage; and S8, purging maintenance is carried out. The anti-leakage system is arranged to seal the gas pipeline and the gas supply port of the plasma deposition furnace, and meanwhile, leaked gas is recycled, so that the harm of leakage is eliminated, and the safety is improved.

The invention belongs to the technical field of battery temperature control, and discloses a wide-temperature-range intelligent temperature compensation control system and method for an ultralow-temperature power battery. Acquiring operation state data; based on the operation state data, injecting identification current perturbation, and collecting and obtaining equivalent internal resistance spectrum characteristic parameters of the power battery pack in each sampling period; according to the equivalent internal resistance spectrum characteristic parameters and the dynamic electricity rental surface temperature and the environment temperature in the operation state data, a wide-temperature-zone temperature compensation factor and a dynamic power release coefficient are calculated; based on the wide-temperature-range temperature compensation factor and the dynamic power release coefficient, generating a time-sharing power distribution instruction and a self-heating pulse control instruction for each single battery; and according to the time-sharing power distribution instruction and the self-heating pulse control instruction, a switch matrix and a power conversion unit of an internal battery cluster are rented through dynamic electricity, and transient electronic temperature compensation and power output control are executed.

A device and method for high speed metamagnetic resistive switching provides a metamagnetic phase transitioning (MPT) portion formed on a substrate between terminals. The MPT portion is tuned for temperature-responsive transitions between magnetic phases through a transition phase. The phases are delineated by phase boundaries each traversed at different critical temperatures depending on direction of traversal. The critical temperatures of each phase boundary are mutually offset by a hysteretic shift. The MPT portion is boosted across one phase boundary responsive to thermal actuation pulsed in a first direction to reach or exceed both critical temperatures of that phase boundary in the first direction, and boosted across the other phase boundary responsive to thermal actuation pulsed in a second direction to reach or exceed both critical temperatures of that phase boundary in the second direction. The electrical conduction path is thereby adjusted in resistivity for switching between ON and OFF states.

The present application relates to the technical field of dynamic positioning of steel material local heating cutting, and discloses a steel material cutting positioning system, which comprises a cutting energy source numerical control controller and a thermal signal sensing base station which moves integrally with a workpiece, wherein the actual thermal diffusivity of the workpiece is self-calibrated through double-point inquiry before cutting, and in the cutting, the thermal pulse emitted by the energy source is responded by the base station and the real position is solved through three-side measurement to generate a coordinate offset value to correct the subsequent path in real time, the present application directly establishes the measurement reference on the workpiece body, so that the physical drift and deformation of the workpiece caused by local heating are converted from a continuous cumulative positioning error source into a background condition which is real-time surveyed and internally eliminated in each position solving, thereby solving the problem of dynamic disconnection of the coordinate system.

The invention discloses an air conditioner control method for airport zone control, particularly relates to the technical field of terminal air conditioner ventilation control, and aims to solve the problem that comfort and energy consumption are difficult to consider due to synchronous imbalance of heat and humidity loads caused by passenger flow pulse and external meteorological disturbance. Passenger flow behaviors and meteorological disturbance are jointly projected to a unified space basis, synchronous perception of an air conditioner and a ventilation adjustment object is achieved, two parameters of thermal impulsion and humidity hysteresis amplitude are introduced on the basis, and the homonymy of thermal and humidity disturbance is described through included angle cosine, so that adjustment logic pays attention to the change degree and is also sensitive to impact collaboration, and the overall performance of the air conditioner and the ventilation adjustment object is improved. Adjustment priority screening is completed before an adjustment strategy is generated, and resources are prevented from being dispersed in a non-key area; a subsequent adjustment result acts on a prediction kernel weight through heat and humidity deviation feedback of a breathing area, continuous transition from sensing to decision making to correction is achieved, and adaptability and adjustment efficiency under sudden passenger flow change and meteorological disturbance are improved.

The invention relates to the technical field of ultrasonic testing, in particular to a nondestructive testing method and device for inclusions in a titanium alloy bar. The method comprises the following steps: synchronously acquiring ultrasonic A scanning signals before and after multi-moment thermal imaging and thermal excitation by applying thermal pulse excitation; calculating a delay cooling factor based on the pixel temperature time sequence change, determining a hot spot existence rate in combination with the spatial distribution of the delay cooling factor in a multi-direction neighborhood, and screening a thermal abnormal region; in the region, a peak redundancy coefficient is determined by using time sequence volatility of ultrasonic signal amplitude, A scanning waveforms before and after thermal excitation are analyzed through window sliding cross-correlation to obtain a distortion degree, the two are fused to obtain an ultrasonic abnormal degree, and whether inclusions exist or not is judged according to the ultrasonic abnormal degree. According to the method, ultrasonic scattering noise caused by a titanium alloy coarse grain structure is effectively avoided, and the reliability of tiny inclusion detection is improved.

The present application relates to the field of screw detection equipment, specifically is a kind of bulking machine screw detection equipment, including base, and for limiting screw and driving its rotation drive assembly, base is provided with the detection mechanism for detecting the outer diameter of screw, heating mechanism for the local shaft section of screw is radiated heating, friction mechanism for simulating the physical contact and friction of the material of simulation accumulation screw, the temperature gradient in the actual working condition of the present application is simulated using two heating covers;Through several grinding blocks, simulate the physical contact and friction heat of screw in actual working condition, while using the periodic contact of grinding block when screw rotates, simulate the transient radial heat pulse of screw when working;Finally, use range finder to monitor screw in real time, by detecting the expansion degree, jumping condition and bending condition of screw, the thermal expansion performance of screw under simulated actual working condition is comprehensively judged, so that the detection result is closer to the real working condition.

The present application relates to the technical field of fluid measurement, and discloses a rock fracture seepage velocity detection method and system based on optical fiber sensing, which comprises the following steps: constructing a sensing detection network based on optical fibers and auxiliary heat sources of a sensing monitoring network; injecting a thermal pulse into rock fractures based on the sensing detection network to obtain a thermal disturbance field; exciting the rock fractures based on the thermal disturbance field; demodulating sensing optical fiber signals to obtain multi-physical field coupling response data; jointly analyzing the multi-physical field coupling response data based on a multi-physical field coupling forward model to obtain seepage characteristic strain components; performing velocity inversion on the seepage characteristic strain components based on the spatial distribution of the multi-physical field coupling forward model to obtain fracture seepage velocity; and performing difference integration on the fracture seepage velocity to generate seepage velocity distribution monitoring results of the rock fractures.

A transistor including a thermoelectric dielectric layer between a channel material and a gate electrode. The thermoelectric layer may have a crystal configuration that can be changed by applying a thermal pulse. Different crystal configurations have different polarizations, which results in different dielectric constants. The crystal configuration may be varied during operation using the heating element to convert a single device between two different threshold voltages.

The invention relates to the field of screw detection equipment, in particular to bulking machine screw detection equipment which comprises a base and a driving assembly used for limiting a screw and driving the screw to rotate. The base is provided with a detection mechanism used for detecting the outer diameter of the screw, a heating mechanism used for conducting radiation heating on the local shaft section of the screw and a friction mechanism used for simulating physical contact and friction of stacked materials to the screw. Two heating covers are adopted for simulating the temperature gradient of the screw in the actual working condition; physical contact and friction heat generation of the screw in an actual working condition are simulated through a plurality of grinding blocks, and transient radial heat pulses of the screw during working are simulated by utilizing periodic contact between the screw and the grinding blocks during rotation; and finally, monitoring the screw rod in real time by using a range finder, and comprehensively judging the thermal expansion performance of the screw rod under the simulated actual working condition by detecting the expansion degree, the jumping condition and the bending condition of the screw rod, so that the detection result is closer to the real working state.

Transistors that incorporate a pyroelectric dielectric layer between the channel material and the gate electrode. This pyroelectric layer can have a crystal configuration that can be changed by applying a heat pulse. Different crystal configurations exhibit different degrees of polarization, resulting in different dielectric constants. The crystal configuration can be changed during operation using a heating element, thereby switching a single device between two different threshold voltages.

The invention relates to the technical field of traditional Chinese medicine evaporation control, in particular to an online detection system for a traditional Chinese medicine production process. According to the system, the temperature of an inlet of a heater in a concentration tank and the temperature of a liquid medicine body are monitored in real time, the form and characteristics of temperature fluctuation at the monitoring moment are analyzed, and a heating pulse set and a standard pulse set are extracted; constructing an evaluation matrix based on heat conduction time constraint, solving global optimal matching, screening a heat transfer pulse pair set, calculating a pulse broadening ratio, and synthesizing a heat transfer resistance index; and further inverting the solute concentration boiling point value based on the deviation between the actually measured temperature and the heat transfer resistance index. Therefore, the system carries out dual threshold judgment of concentration standard reaching and rheological safety, and decides the evaporation state and production safety control in real time. Through thermodynamic closed-loop regulation and control, the problem that the temperature measurement is mismatched with the real concentration under the high-viscosity working condition is solved, and the accuracy of traditional Chinese medicine concentration end point detection and the production safety are improved.

The application discloses a preparation process of high-quality medium-manganese steel stamping parts and belongs to the field of advanced steel materials. The application utilizes the particularity of different energy fields to avoid the problems of surface oxidation and difficult-to-ensure size precision caused by traditional heat fields by coupling a low-temperature heat field, a pulse electric field and a pressure field, and finally develops high-precision high-performance medium-manganese steel stamping parts. The specific steps of the application comprise the following steps: (1) low-temperature preheating treatment: low-temperature heating of warm-rolled medium-manganese steel; (2) pulse current rapid heating: heating of the plate by high pulse current density; (3) hot stamping: hot stamping of the medium-manganese steel by a stress field coupled pulse electric field; (4) pressure maintaining and cooling: pressure maintaining of the stamping part, taking out of the stamping part and air cooling to room temperature. The medium-manganese steel stamping part obtained by the process has a tensile strength of more than 1600 MPa and an elongation of 20%, and has small surface oxidation, small springback and high size precision.

A phase-change material switch may include a first interconnect-level dielectric, a heat spreader formed within the first interconnect-level dielectric, a second interconnect-level dielectric formed over the heat spreader, a phase change material element formed in or over the second interconnect-level dielectric, a first electrode and a second electrode in electrically conductive contact with the phase change material element, and a heating element coupled to the phase change material element and configured to supply a heat pulse to the phase change material element. The heat spreader may be located proximate to a first one of the phase change material element and the heating element, and the heat spreader may be smaller than the phase change material element. The heat spreader may be form using materials and processes similar to those used to form electrical interconnects, but unlike electrical interconnects, the heat spreader may be electrically isolated from electrical interconnects.

This invention relates to the field of semiconductor heat dissipation control technology, specifically a silicon carbide multilevel converter control method and system based on embedded microchannel heat dissipation. The method includes: calculating the thermal wake coupling potential index of each SiC power transistor under the current power level based on an embedded flow path thermal wake coupling risk assessment strategy; dynamically evaluating the local thermal boundaries of all power modules in the multilevel system based on the thermal wake coupling potential index to obtain a first set of thermally hazardous module modes; obtaining real-time fluctuation tracking data involving fluid transport characteristics to construct an electro-current coupling analysis model; outputting the heat dissipation uniformity of each power module based on this model; outputting the deviation ratio of module thermal aging; and performing carrier phase shift compensation control on the carrier scheduling sequence of the multilevel converter based on the deviation ratio. This invention solves the problem in the prior art of being unable to perceive the physical delay of the thermal pulse generated by the upstream switching transistor propagating in the microchannel.

The embodiment of the application provides a determination method of a heating pulse and a printing chip. The gray value of a pixel point is converted into a binary value, the binary value comprises a first effective bit and a second effective bit, a first heating pulse with the same pulse width is matched for each bit of the first effective bit, and a second heating pulse is matched for each bit in the second effective bit, so that the highest pulse width can be reduced, the current pressure can be reduced, and the number of excessive pulses can be avoided, and the printing speed is improved.

The present application relates to terephthalic acid hydrorefining catalyst preparation technical field, specifically to a kind of preparation and application of supported palladium catalyst of plasma cooperation.This application overcomes the problems that active component of supported palladium catalyst is easy to agglomerate, poor in anti-poisoning ability and metal is easy to peel off and deactivate under high temperature environment.By liquid plasma, surface energy excitation is carried out on non-carbon carrier, and nano-defects with quantum trap effect are constructed;Then, using polyethyleneimine or phytic acid and other bifunctional organic ligand chelate palladium precursor solution, combined with ultrafast joule heat pulse flash process, ligand is induced to carbonize in situ on metal surface;Finally, assisted by plasma directional crystal face induced reduction;The dispersion of active center is effectively improved, the space confinement and shape selection shielding of active site are realized, the metal loss rate and the residual amount of carboxybenzaldehyde are reduced, and the anti-poisoning performance and service life of the catalyst under industrial conditions are enhanced.

The technology described herein is directed towards a reconfigurable intelligent surface (metasurface) design and implementation in which phase change (chalcogenide) material is (e.g., monolithically) integrated in each unit cell of the reconfigurable intelligent surface. The conductive or nonconductive states of the phase change (chalcogenide) material can be individually controlled (thermally-pulsed) per unit cell, which determines the phase of the unit cell based on the unit cell's conductive or nonconductive phase change material until subsequently pulsed, without needing continuous applied power. For example, with three phase change elements per unit cell, eight different state combinations can be controllably achieved, whereby dynamic reconfiguration of the reconfigurable intelligent surface to a given phase profile can be used to beamform a reflected beam in one shape and direction, and then to a different phase profile that changes the unit cells' states to beamform another reflected beam in another shape and / or direction.

Methods and apparatuses for manipulating the temperature of a surface are provided. Devices of the present disclosure may include a thermal adjustment apparatus, such as a controller in electrical communication with one or more thermoelectric materials, placed adjacent to the surface of skin. The device may generate a series of thermal pulses at the surface, for providing an enhanced thermal sensation for a user. The thermal pulses may be characterized by temperature reversibility, where each pulse includes an initial temperature adjustment, followed by a return temperature adjustment, over a short period of time (e.g., less than 120 seconds). The average rate of temperature change upon initiation and upon return may be between about 0.100 / sec and about 1 OOC / sec. In some cases, the average rate of the initial temperature adjustment is greater in magnitude than the average rate of the return temperature adjustment.

This invention relates to the field of semiconductor heat dissipation control technology, specifically a silicon carbide multilevel converter control method and system based on embedded microchannel heat dissipation. The method includes: calculating the thermal wake coupling potential index of each SiC power transistor under the current power level based on an embedded flow path thermal wake coupling risk assessment strategy; dynamically evaluating the local thermal boundaries of all power modules in the multilevel system based on the thermal wake coupling potential index to obtain a first set of thermally hazardous module modes; obtaining real-time fluctuation tracking data involving fluid transport characteristics to construct an electro-current coupling analysis model; outputting the heat dissipation uniformity of each power module based on this model; outputting the deviation ratio of module thermal aging; and performing carrier phase shift compensation control on the carrier scheduling sequence of the multilevel converter based on the deviation ratio. This invention solves the problem in the prior art of being unable to perceive the physical delay of the thermal pulse generated by the upstream switching transistor propagating in the microchannel.

The invention discloses an artificial board surface mildew-proof intelligent detection method based on machine vision, and relates to the technical field of visual detection, and the method specifically comprises the following steps: obtaining a white board flat field, a dark field and a calibration checkerboard reference frame, and synchronously collecting an ultraviolet gating fluorescence frame, a laser speckle frame column and a micro thermal pulse response frame sequence to form a multi-channel frame column package; laser speckle frame columns in the multi-channel frame column package are used for overlapping pixel brightness changes in the time sequence, an activity prompt graph is generated, and an activity band limiting area is extracted; and performing early window and late window comparison on the ultraviolet gating fluorescence frame in the limited area of the activity band, only retaining metabolic reaction sensitive bright spots in the activity band, and generating a metabolic trace graph. According to the method, an activity prompt graph and an activity band are generated according to a time sequence of laser speckles, follow-up processing is limited in a micro-dynamic salient region, and static interference such as wood grains and coatings is inhibited priori; the ultraviolet early / late window contrast is carried out in the activity band, only metabolic sensitive bright spots are reserved, and the detectability of early weak signals is improved.

The invention provides a head-mounted aircraft complete coating damage visualization system, which belongs to the field of stealth airplanes and comprises a cluster type uniform heating system, a head-mounted visualization system and a narrow area small heating detection component. The cluster type uniform heating system is used for carrying out cluster heating on a large-area area on the surface of an aircraft and providing a heat source for coating damage detection; the head-mounted visualization system comprises a binocular infrared imaging mirror which is used for collecting a temperature change image sequence of the airplane surface after thermal pulse excitation and realizing rapid detection and visual presentation of a large-area surface coating; the small heating detection component (hereinafter referred to as a small component) for a narrow area is used for rapid detection of corners and narrow areas of an aircraft so as to realize comprehensive and rapid detection of the whole aircraft. The aircraft stealth coating damage detection efficiency and accuracy can be improved, and the rapid inspection requirement before an aircraft task is met.