11 results about "Thermal pulse" patented technology

The invention discloses a leakage monitoring method of a sealing connection structure for hydrogen conveying, and relates to the field of gas conveying and storage monitoring, and the method comprises the steps: S1, arranging an annular negative pressure sampling cavity to collect multi-modal data, and calculating the angle section suspiciousness; s2, applying thermal pulse and sweep frequency sound wave excitation, and collecting a response signal to generate a thermoacoustic leakage score; s3, environment compensation and multi-sensor fusion are carried out to obtain an angle section hydrogen concentration time sequence; s4, obtaining an inversion flux based on the comprehensive response and sparse-smooth inversion to realize leakage positioning; and S5, calculating a risk score and performing graded alarming according to a threshold value. Multi-point detection units are arranged in the circumferential direction of the sealing connection structure, signal fusion is adopted, full-coverage leakage monitoring and high-precision positioning of the sealing structure are achieved, emergency measures are automatically triggered in combination with risk grading, and the discovery timeliness and safety are improved.

The invention relates to the technical field of constructional engineering detection, in particular to a concrete strength detection method and system. The method comprises the following steps: placing a thermal reference block with known thermal physical characteristics in the center of a target area on the surface of to-be-detected concrete; taking the thermal reference block as a center, applying synchronous thermal pulses with the same energy to the surfaces of the concrete at the symmetrical positions on the two sides of the thermal reference block, recording the formed thermal response by using an infrared thermal imager, generating thermal response data, and forming two hot spots on the surface of the concrete; monitoring the environment temperature fluctuation by using the thermal reference block, and subtracting the quantity of the environment temperature fluctuation from the thermal response data in real time to obtain a thermal attenuation curve of the hot spots; and analyzing the isotherm contour form distortion degree of the thermal field corresponding to the thermal attenuation curve, and quantifying the isotherm contour form distortion degree as a thermal field structure polarization index. The problems of environmental interference and internal structure quantification in existing concrete strength detection are solved through a constructional engineering detection technology.

The invention discloses a wall crack detection system and method based on an image recognition technology, relates to the technical field of computer vision and image processing, and generates geometric confidence and constructs a space-time response field by applying micro-vibration excitation and thermal pulse excitation and collecting a visible light dynamic sequence and an infrared thermal response sequence. And the mutual verification gating assembly performs crack candidate region screening based on the opening and closing response and the fusion confidence coefficient of the thermal fracture channel, and forms a crack topology signature evolution sequence through topology signature generation and evolution evaluation. And the closed-loop scheduling component generates uncertainty indexes according to crack evolution characteristics, and dynamically adjusts a detection action parameter set. And updating a fusion confidence coefficient threshold value and a primitive confidence coefficient parameter threshold value through a historical topology difference set and an uncertainty index, and ensuring adaptive updating in a detection process. The system can efficiently and accurately detect wall cracks and provide traceable evolution analysis, and has high robustness and engineering application value.

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 0.1° C. / sec and about 10.0° C. / 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.

The application relates to the technical field of building engineering detection, in particular to a concrete strength detection method and system. The method comprises the following steps: placing a thermal reference block with known thermal physical properties in the center of a target area on the surface of concrete to be detected; applying synchronous thermal pulses with the same energy to the concrete surfaces on the two sides of the thermal reference block in a symmetrical position, recording the formed thermal response by using an infrared thermal imager, and generating thermal response data, wherein two thermal spots are formed on the surface of the concrete; monitoring the environmental temperature fluctuation by using the thermal reference block, subtracting the amount of the environmental temperature fluctuation from the thermal response data in real time, and obtaining the thermal decay curve of the thermal spot; analyzing the isotherm profile distortion degree of the thermal field corresponding to the thermal decay curve, and quantifying the thermal field structure polarization index. The application solves the problems of environmental interference and internal structure quantification in the existing concrete strength detection by using the building engineering detection technology.

The application discloses a flywheel post-processing thermal deformation residual stress release and return control system and method, relates to the advanced manufacturing and industrial artificial intelligence control technical field, and the steps of the method comprise the following steps: obtaining flywheel initial compressive stress and asynchronous space-time sensing data in sequence, and extracting a thermal hysteresis dislocation index, a warping misjudgment separation degree and a targeted compressive stress retention rate in parallel; the above-mentioned multi-source features are injected into a waveform optimization model to calculate a coupling degradation flow form degree, and a variable-frequency pulse heating waveform is output by combining a anti-whip bias matrix inversion; finally, the reciprocal of the flow form degree is monotonically integrated and mapped to generate a return position confidence index, so as to trigger the system to stop accurately. The application effectively avoids the structural resonance caused by high-frequency thermal pulses, avoids the indiscriminate dissipation of the preset compressive stress resisting centrifugal force, and realizes the safe release of residual stress and the size return.

This invention relates to the field of data processing technology, specifically to a method for processing high-resolution in-situ seabed heat flux data, comprising the following steps: acquiring raw measurement data from a high-resolution seabed heat flux meter; converting the thermistor records in the raw measurement data into temperature values ​​using a tenth-order fitting method; removing interference data from the converted temperature values; selecting temperature data from all effective channels recorded during the stationary depth range of the seabed heat flux meter in seabed sediments, and calculating the average temperature gradient; estimating the in-situ thermal conductivity by fitting a thermal pulse attenuation curve; and calculating the average heat flux density based on the average temperature gradient and the in-situ thermal conductivity. This invention enables the analysis, processing, and visualization of raw data from high-resolution seabed in-situ heat flux meters.

The invention relates to the technical field of data processing, in particular to a processing method for high-resolution seabed in-situ heat flow data, which comprises the following steps of: acquiring original measurement data of a high-resolution seabed heat flow meter, and converting a thermistor record in the original measurement data into a temperature value by adopting a ten-order fitting method; interference data in the converted temperature value are removed; selecting temperature data recorded by all effective channels in a statically measured depth interval staying time period of the seabed heat flow meter in the seabed sediment, and calculating an average temperature gradient; estimating in-situ thermal conductivity through thermal pulse attenuation curve fitting; and calculating the average heat flux density according to the average temperature gradient and the in-situ heat conductivity. According to the invention, the analysis processing and visual display of the original data of the high-resolution seabed in-situ heat flow meter can be realized.

Methods and devices for manipulating the temperature of a surface are generally provided. The present disclosure relates to a device including one or more heating and / or cooling elements, or other suitable thermal adjustment apparatus(es), placed near a surface, such as the skin of a user. The device may be configured to generate one or more (optionally alternating) thermal profiles at the surface, which may include a series of thermal pulses and / or essentially continuous or semi-continuous thermal input, which may vary over time. Such thermal profiles, when suitably applied, may provide enhanced thermal sensations for a user which, in some cases, may provide the user with a more pleasurable thermal experience than would otherwise be the case without the generation of the thermal profiles. In some embodiments, an alternating thermal profile may include an average frequency, an oscillation window, and / or an average temperature, each of which may be adjustable.

The invention belongs to the technical field of material physical property testing, and discloses a concrete solidification process physical property on-line determination system, which comprises an in-situ composite detector and a measurement and control and analysis host, the host is used for applying a thermal pulse, collecting a response curve and stripping background temperature to obtain a decoupling waveform, the time domain and amplitude domain characteristic parameters are extracted from the decoupling waveform, the effectiveness of the time domain characteristic parameters is verified based on a cooperative relation model of the time domain and the amplitude domain characteristic parameters, the physical structure evolution is directly represented, hydration heat interference is decoupled, meanwhile, the cooperative relation of the time domain and amplitude domain characteristics is utilized, self-diagnosis of the effectiveness of the measurement path is achieved, and the measurement accuracy is improved. And the problem of measurement failure in a non-uniform medium is solved.

The application discloses a water quality identification system and method based on multi-component ion mobility deviation characteristics. The system adopts a three-layer architecture of a hardware perception layer, an algorithm analysis layer and a performance application layer. The hardware perception layer collects TDS, pH, EC and temperature signals in real time through a multi-parameter integrated sensor array. The algorithm analysis layer includes a binary matrix model module, a nonlinear jump detection module and a dynamic thermal transient response module. The ion component type is identified by calculating the conductivity response deviation factor D of different ion components. The critical jump point of the performance mutation of the reverse osmosis membrane is captured as the filter core life warning criterion through the concentration gradient incremental test. The water samples with similar static conductivity but different ion compositions are distinguished through the thermal pulse excitation test. The performance application layer converts the analysis results into a multi-dimensional characteristic fingerprint radar chart and a performance evaluation report. The system is also provided with an adaptive correction module, which can automatically correct the judgment criteria when deployed across regions.