91 results about "Heat pulse" patented technology

The invention discloses a method for converting a waste wind power blade composite material into silicon carbide, which comprises the following steps: mixing waste wind power blade composite material powder with a conductive agent to obtain a mixture, the waste wind power blade composite material comprising a silicon element and a carbon element; and performing flash Joule heat treatment on the mixture to obtain the silicon carbide. According to the method, the waste wind power blade composite material powder does not need to be subjected to any pretreatment such as pyrolysis, the waste wind power blade composite material can be converted into the silicon carbide with the high additional value only through one-step flash Joule heat treatment in the presence of the conductive agent, and the process steps are simple; and meanwhile, the flash Joule heat treatment is an electric heating pulse rapid high-temperature treatment mode, so that the time consumption is very short, and the method is energy-saving, efficient and environment-friendly.

The invention provides a method for automatically monitoring the humidity of a corrugated board on line, and belongs to the technical field of corrugated board production. Uniform thermal pulses are applied to the surface of the corrugated board through a thermal infrared imaging device in combination with a thermal pulse excitation system, and high-resolution thermal response images are collected in real time. The system calculates thermal diffusivity and thermal attenuation characteristics based on an unsteady state heat conduction equation, generates a temperature distribution matrix, extracts a humidity characteristic spectrum by using a heat and humidity two-parameter neural network model, and establishes a corresponding relation between temperature and water content. Carrying out region segmentation through the humidity characteristic spectrum, identifying a humidity abnormal region, calculating a deviation value, and triggering an alarm when the deviation value exceeds a preset threshold value. The technical problem that in the prior art, corrugated board humidity detection mainly depends on manual sampling and special instruments, and real-time online monitoring on a production line cannot be achieved is solved.

The invention discloses a vacuum brazing quality detection method for a heat dissipation structure and related equipment, and the method comprises the steps: obtaining heat flux density distribution data of the heat dissipation structure, and dividing the heat dissipation structure into different functional regions according to a thermal efficiency index; differential thermal pulses are applied to the heat dissipation structure in the vacuum brazing process, and thermal pulse response data and technological process monitoring data are obtained; calculating a thermal response characteristic parameter, comparing the thermal response characteristic parameter with a preset parameter range, identifying an abnormal state and generating a process adjustment instruction; performing time-space synchronization processing on the thermal response characteristic parameters and technological process monitoring data, and determining defect types, positions and severity; and performing a thermal load test to obtain heat conduction characteristic data, and quantitatively evaluating the structural integrity and the heat conduction performance of the brazed joint surface. According to the method, the defects of the internal joint surface can be detected in real time in the vacuum brazing process, the heat dissipation performance is accurately evaluated, and the limitation of a traditional detection method in coping with a complex geometric structure is solved.

The invention discloses a grinding wheel wear degree identification method and device based on adaptive neural fuzzy reasoning. The method comprises the steps that a grinding temperature signal, grinding force and the surface quality of a workpiece are obtained; determining the abrasion stage of the grinding wheel according to the surface quality, the grinding force and the grinding temperature; extracting the total number of thermal pulses in the grinding temperature signal as the number of dynamic effective abrasive particles; a grinding wheel surface topography graph is obtained, abrasive dust and abrasive particle abrasion in the grinding wheel surface topography graph are recognized and distinguished through an HSV segmentation method, the area rate is calculated, and the abrasive dust proportion and the abrasive particle abrasion proportion are obtained; and the abrasive dust proportion, the abrasive particle abrasion proportion and the dynamic effective abrasive particle number serve as input, the abrasion stage serves as output, the self-adaptive neural fuzzy inference system is trained, and the trained self-adaptive neural fuzzy inference system is obtained for abrasion degree recognition. According to the method, the abrasion condition of the grinding wheel can be accurately and conveniently judged by utilizing the self-adaptive neural fuzzy reasoning technology and synthesizing the multi-dimensional characteristic signals in the grinding process.

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 relates to the technical field of safety management, in particular to a safety management method and system for a heat supply pipe network, and the method comprises the following steps: applying heat pulse to a key section of the heat supply pipe network, monitoring propagation, collecting temperature, pressure and flow data, analyzing delay, temperature change and pressure fluctuation, determining a propagation path, evaluating transmission efficiency, and adjusting heat distribution. And monitoring the area temperature in real time, evaluating the safety risk, sending an adjustment instruction, updating the management and control priority, and generating a feedback result of the pipe network state after scheduling. According to the invention, by capturing the dynamic change of heat transmission, the heat transmission path and efficiency can be evaluated in real time, the heat distribution of the pipe network can be optimized, the temperature data of the pipe network area can be analyzed in real time, the risk area can be identified and the risk can be evaluated, the key area can be preferentially managed and controlled, and the flexibility and response speed of the pipe network to the change can be improved; and the possibility of failure occurrence is reduced, and the stability and safety of heat supply are ensured.

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.

The invention discloses a highly-integrated miniature intelligent fuse module and a preparation process thereof, and the process comprises the steps: carrying out the high-frequency electromagnetic disturbance detection of a fusing element and a temperature sensor interface region, obtaining an electromagnetic response fingerprint, and determining an interface defect suspected point distribution diagram; micro-pulse thermal excitation is applied to the fuse element, a thermal pulse propagation process and sensor response are captured, and an interface thermal resistance distribution diagram is generated; carrying out acoustic microscopic analysis on the thermal resistance abnormal region to generate an interface defect fine classification graph; performing an electric-thermal transient response collaborative test on the fuse module to obtain a performance parameter test result; and performing targeted accelerated aging treatment on different types of interface defect samples, periodically detecting in the aging process, and determining a quality grade and a reliability prediction result. According to the method, the defects of the interface area of the intelligent fuse module are recognized and represented, the incidence relation between defect characteristics and function influences is established, the long-term reliability of products is effectively evaluated, and the quality control level of the products is remarkably improved.

The invention discloses a device and method for drying lump ore through thermal pulses. The device comprises a waste gas header pipe, a regulating valve, an induced draft fan, an air inlet header pipe and a stock bin which are sequentially connected. A plurality of single-layer branch pipes are connected in parallel to the tail end of the air inlet header pipe; the single-layer branch pipe is connected with a plurality of headers in parallel, and a plurality of spray pipes are connected between the headers and the stock bin; and a stop valve is arranged at the air inlet of each collecting pipe. The switching valve is utilized, only part of the collecting pipes are opened, on the premise that the total air inlet amount is not changed, the smoke flow of the air outlet is increased, the drying effect can be guaranteed, and energy waste is avoided. The opening degree of the regulating valve is controlled to be increased and then decreased, and the purpose of reducing energy consumption is achieved. Two or more groups of radial spray pipes are arranged in a combined and staggered manner and a pulse type flue gas spraying manner is adopted, so that the gas inlet position in a material layer is periodically changed in a pulse manner, the same amount of hot flue gas is introduced into more flue gas introduction points, the flue gas circulation area is larger, more ore particles are covered, and the drying efficiency is higher.

The invention discloses a welding quality detection method for a precise heat dissipation tooth-shaped plate, and the method comprises the steps: determining a heat flow feature point on the tooth-shaped plate, and applying a thermal pulse sequence to obtain dynamic thermal response data; performing space-time decomposition on the thermal response data to generate thermal disturbance response fingerprints; applying a preset phase thermal pulse source according to the thermal disturbance response fingerprint to obtain thermal wave interference field data and generate a thermal wave interference defect map; periodic thermal excitation is applied according to the thermal wave interference defect map, a thermal attenuation time constant is obtained, and a resonance thermal attenuation spectrum and a spectrum consistency spatial distribution map are generated; and calculating a thermal defect severity index according to the spectral consistency spatial distribution map and the thermal wave interference defect map, and generating a welding quality evaluation result. According to the technical scheme, direct correlation between the welding quality and the heat dissipation performance can be established through thermal wave interference and thermal resonance analysis, the welding defect which affects the heat conduction efficiency but does not cause obvious structural failure is effectively recognized, and accurate evaluation of the welding quality is achieved.

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.

The utility model discloses a thermal pulse probe for accurately measuring the evaporation capacity of biological crust soil, and belongs to the field of soil measuring equipment. The probe comprises a probe handle, and a plurality of heating needles and temperature sensing needles which are vertically fixed on the probe handle and are distributed in n layers, the first layer comprises three temperature sensing needles which are vertically arranged at equal intervals from top to bottom; the second layer to the nth layer take the heating needle as the center, two temperature sensing needles are arranged on the two horizontal sides respectively, the heating needles of the second layer to the nth layer are vertically arranged on one line, and the vertical distances between the heating needles of all the layers are the same; the distances between the three temperature sensing needles in the first layer and the heating needles in the second layer are the same. According to the utility model, the obvious correlation between the soil thermal capacity and the moisture is utilized, the change of the moisture content is calculated by accurately measuring the soil thermal capacity, and the evaporation capacity of the soil covered by the biological crust is obtained. The device has the advantages of quick response, high sensitivity and small disturbance to soil when being used for measuring the soil moisture change, and is suitable for measuring the evaporation capacity of biological crust.

The present invention relates to the technical field of peroxide raw material quality monitoring, and discloses an intelligent peroxide raw material quality control system. The system comprises: a differential heat flow sensing unit for continuously measuring the temperature gradient between the raw material barrel wall and the ambient air; a posture sensing unit for monitoring the physical motion state; an edge processing unit for performing a time-series integration of the temperature gradient when the raw material barrel is stationary to calculate a degradation degree value, and triggering an early warning when a threshold is exceeded. The present invention achieves continuous quantitative tracking of the peroxide raw material degradation process, avoiding the limitations of traditional discrete detection, ensuring measurement authenticity through the dual mechanisms of motion state recognition and signal filtering, and ensuring long-term monitoring reliability in combination with self-heating pulse calibration technology, thereby providing a new process monitoring method for chemical storage safety.

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 discloses a method for determining a thermal pulse moisture probe calibration formula under any heating power, and aims to solve the problems that a complete test needs to be carried out under each heating power, the workload is large and the time consumption is long in the traditional calibration, three different heating powers Q are randomly selected, a Tt-w calibration test is carried out under the three heating powers, and the thermal pulse moisture probe calibration formula under any heating power is determined. According to the method, a Tt-Q linear relation is established, a corresponding Tt value under the target heating power is calculated in combination with a calibration formula, finally, a Tt-w empirical model is predicted through fitting, calibration formula coefficients A, B and C are obtained, a Tt-w calibration formula under the target power is obtained, and the calibration formula can be rapidly determined without independent calibration for each power. According to the method, the calibration efficiency of the thermal pulse moisture probe can be effectively improved, the test cost is remarkably reduced, the calibration precision is ensured, and the method has the advantages of simplicity, convenience, high efficiency and reliability and has good accuracy and practicability.

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.

A method for maintaining the thermal stability of a laser device, a laser device power source system, and a laser device. The method comprises: acquiring the current light-emission frequency of a light-emission pulse signal of a laser device (S202); and in response to the current light-emission frequency being less than a preset frequency threshold value, generating a preheating pulse train signal before the light-emission pulse signal is generated, wherein the total power generated by the laser device under the drive of the preheating pulse train signal and the light-emission pulse signal is kept within a preset thermal stability power interval (S204). By using the method, the thermal lensing effect of a laser device crystal can be overcome, thereby improving the thermal stability of a laser device.

The invention provides a probe deflection correction method and device for a trunk liquid flow heat pulse probe. The method comprises the following steps: determining xylem volume heat capacity through tree water content and dry material density obtained through real-time measurement; under the condition that it is judged that the liquid flow speed is within the preset speed interval, in the time range from the heat pulse closing moment to the first preset moment, nonlinear fitting is conducted on the change rule of the temperature difference of the upstream probe along with time and the change rule of the temperature difference of the downstream probe along with time, and the heat conductivity is obtained; dividing the thermal conductivity by the xylem volume thermal capacity to obtain a thermal diffusion coefficient; on the basis of a heat convection conduction equation, calculating according to the heat conductivity and the heat diffusion coefficient to obtain an upstream probe actual distance and a downstream probe actual distance; compared with an interval correction method based on a single probe benchmark in the prior art which is unstable in different deflection scenes, solution of the actual interval of the probes is not affected by the deflection scenes, stability of correction is guaranteed, and accuracy is high.

To alleviate constraint on the design of a recording element substrate.SOLUTION: A recording element substrate includes: a nozzle for discharging liquid; an energy generation part for generating energy for discharging the liquid from the nozzle; a latch input terminal 305 for inputting a latch signal; a data input terminal 306 for inputting a data signal for controlling a driving state of the energy generation part; a heat pulse generation circuit 313 for generating a heat pulse signal for determining a driving timing of the energy generation part; a latch circuit 311 to which the data signal is transferred from the data input terminal 306, and that inputs the data signal at a timing when the latch signal is input; a driving element 315 to which the heat pulse signal and the data signal are transferred, and that outputs a driving signal for determining the driving state of the energy generation part, by a logic product of the heat pulse signal and the data signal; and a delay circuit 312 for delaying the latch signal and inputting the delayed latch signal to the latch circuit 311.SELECTED DRAWING: Figure 3

The invention relates to a laser thermal stability maintaining method, a laser power supply system and a laser. The method comprises the following steps: acquiring the current light emitting frequency of a light emitting pulse signal of a laser; in response to the fact that the current light emitting frequency is smaller than a preset frequency threshold value, a preheating pulse string signal is generated before the light emitting pulse signal is generated; wherein the total power generated by the laser under the driving of the preheating pulse string signal and the light-emitting pulse signal is maintained within a preset thermal stable power interval. The method can overcome the thermal penetration effect of the laser crystal and improve the thermal stability of the laser.

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.