81 results about "Extremes temperature" patented technology

The invention discloses a football high and low temperature aging detection device, and relates to the technical field of football detection, the football high and low temperature aging detection device comprises a bottom plate, the upper side of the bottom plate is fixedly connected with a detection box body and a fixing frame, the upper side of the bottom plate is provided with a detection unit, and the detection unit is used for simulating an impact and extreme temperature composite environment. A base is fixedly connected to the middle of the upper side of the bottom plate, a football body is arranged on the upper side of the base, a hydraulic cylinder is fixedly connected to the upper side of the fixing frame, and a pressing plate is fixedly connected to the output end of the lower side of the hydraulic cylinder. According to the football high and low temperature aging detection device, through cooperation of the bottom plate, the detection box body, the base and the pressing plate, a football can be stably limited, through linkage of a sliding hole, a movable plate, a connecting rod, impact blocks and a cam, the impact blocks on the left side and the right side are driven by a motor to repeatedly impact the football, and composite environment simulation of the impact effect and the extreme temperature is achieved; the detection condition is closer to the actual football use scene, and the authenticity of the detection result is improved.

The embodiment of the invention discloses a chip temperature control method, device and equipment and a medium, and relates to the technical field of chip testing. The method comprises the following steps: acquiring a temperature fluctuation standard deviation and an error change rate of a to-be-tested chip based on an acquired temperature of the to-be-tested chip; matching a target weighting coefficient combination in a preset fuzzy rule base according to the temperature fluctuation standard deviation and the error change rate; determining a dynamic PID control parameter based on the target weighting coefficient combination and a preset basic PID parameter; and adjusting the power output of the temperature control module by adopting a preset PID control algorithm according to the dynamic PID control parameters so as to control the temperature of the chip. According to the invention, under the condition that only local heating or cooling is carried out on the chip, severe temperature fluctuation of the chip caused by dynamic load change can be effectively handled, and rapid, stable and high-precision control of the chip temperature is realized, so that strict requirements of extreme temperature testing are met.

The invention discloses an automobile part accelerated life test method and system, and the method comprises the steps: setting an extreme temperature cycle: setting a cycle of keeping a low temperature of-40 DEG C for 30 minutes and keeping a high temperature of 180 DEG C for 30 minutes, and setting a temperature change rate of 15 DEG C / min; a multi-physics field coupling test: in an extreme temperature cycle process, synchronously carrying out a resistance test, a withstand voltage test, a turn-to-turn insulation test, a vibration test, a humidity test and a salt spray test, and comprehensively evaluating the electrical, mechanical and environmental adaptability of the parts; multi-scale numerical simulation: establishing material-level, part-level and system-level coupling models, and predicting life distribution of parts; and data-driven optimization: based on historical test data and a numerical simulation result, establishing an acceleration model, dynamically adjusting a temperature cycle parameter and a stress level, and realizing maximization of test efficiency. Based on extreme temperature circulation (-40 DEG C / 30 minutes to 180 DEG C / 30 minutes) and multi-physical field coupling strengthening stress testing, the test time is shortened by 70% or above, and the evaluation error is smaller than or equal to + / -5%.

The invention discloses an intelligent regional refrigeration adjusting system and method based on multi-mode sensing, relates to the technical field of refrigerated cabinets, and aims to solve the problem that a traditional refrigeration device only conducts passive adjustment through pressure and temperature and cannot sense material decay in the early stage. The system comprises a pressure / temperature acquisition module, a state sensing module (a color recognition unit and a smell recognition unit), a grading decision module and a cold supply adjusting module, and material states are divided into L0-L3 four levels; according to the method, multi-modal data are synchronously obtained through a depolarization method, color / smell change indexes are obtained after processing, state grades are judged, customized cold supply instructions (such as L1 cooling and wind speed increasing and L3 limit refrigeration and isolation) and early warning instructions are generated in combination with pressure and temperature, and the instructions are independent in different areas.

A flow disrupter is configured for use in a valve. These configurations are well-suited for applications that subject the valve to extreme temperature gradients that can cause convective flow to develop in their elongate structure and, in turn, increase thermal heat loss and disrupt operator processes. The proposed design introduces obstacles into the elongate structure. These obstacles may create transient seals that inhibit convective flow. In one implementation, this feature may reduce heat loss because it creates localized, smaller circulation zones within the elongate structure.

The invention discloses a method and device for predicting an extreme temperature and a storage medium, and relates to the technical field of air temperature prediction. The method comprises the following steps: acquiring a historical temperature average field, a historical temperature flat field and historical circulation factor observation values corresponding to a plurality of target circulation factors; determining a plurality of target space modes, an abnormal temperature evolution sequence and a corresponding abnormal temperature prediction sequence according to the historical temperature distance flat field; determining predictable effective duration according to the abnormal temperature evolution sequence and the corresponding abnormal temperature prediction sequence; determining a target modal weight coefficient corresponding to each target space modal according to the predictable effective duration; determining a predicted extreme temperature range flat field of the temperature region to be measured according to the historical circulation factor observation value and the target modal weight coefficient; and superposing the predicted extreme temperature distance flat field and the historical temperature average field to obtain an extreme temperature prediction result. According to the invention, the problem of low prediction accuracy of the extreme temperature in the prior art can be solved.

The invention relates to the technical field of shear thickening intelligent protection system control, in particular to a stable regulation and control method for the performance of a shear thickening intelligent protection system at an extreme temperature, which realizes breakthrough through three technical innovations: firstly, temperature subareas (low temperature, medium temperature and high temperature) and impact grading (light, medium and heavy) are preset in the first step; an accurate regulation and control reference is provided for different working conditions; 2, acquiring impact load, temperature and protection performance data (thickening amplitude and recovery time) in real time through a pressure sensor, a temperature sensor and a viscosity sensor (claim 3) adaptive to extreme temperature, and accurately judging the category of a'temperature-load 'working condition; 3, dynamically correcting a threshold value (claim 5) in combination with real-time performance feedback based on a working condition judgment result in the step 3, reducing the threshold value by 5-10% when the thickening amplitude is insufficient, and increasing the threshold value by 5-10% when the thickening amplitude is excessive; the method has the beneficial effects that the response threshold adaptation error can be greatly reduced under various extreme temperature working conditions, and the thickening response time is remarkably shortened.

The application provides a control method and device of an air conditioner and electronic equipment, the method comprising: controlling the air conditioner to start and run in an initial state; acquiring a current indoor temperature of a space where the air conditioner is located when the air conditioner runs for a first preset time period; judging whether the current indoor temperature and a target temperature are equal; determining a preset temperature change rate according to the first acquired current indoor temperature, the target temperature and a first target time when it is judged that the current indoor temperature and the target temperature are equal, the first target time being a time when the first acquired current indoor temperature reaches the target temperature; determining a target working frequency of a compressor according to the preset temperature change rate, and controlling the air conditioner to run according to the target working frequency when the air conditioner runs again. The problem that the extreme temperature of sudden cooling or sudden heating occurs in the indoor space when the air conditioner runs in the prior art, reducing the user experience, is solved.

The application provides a UAV charging generator set stable voltage output method and system under extreme temperature, relates to the technical field of generator set stable voltage output, and comprises the following steps: collecting environmental temperature data and synchronously establishing operation state data; after time sequence mapping, an external temperature disturbance response sequence is established; according to the external temperature disturbance response sequence and local temperature response data, the transmission path and response time difference of environmental temperature disturbance to each functional unit are analyzed, a temperature influence propagation time delay model is established; the temperature lag response characteristics and thermal attenuation characteristics of each functional unit are output, a thermal inertia window is established; a thermal state evolution trend is predicted, the thermal inertia window and the thermal state evolution trend are used to perform control collaborative adjustment of the generator set, and a dynamic stable voltage control strategy is established. Through the application, dynamic analysis and collaborative stable voltage control of environmental temperature disturbance are realized, and the technical effects of improving the stable voltage output stability and operation reliability of the generator set are achieved.

This invention belongs to the field of dehumidification equipment technology and discloses a precise temperature control system for a variable frequency dehumidifier with dual-mode temperature and humidity coordination. Through deep collaboration between the dual-mode decision module and the temperature and humidity calibration module, it dynamically switches between dehumidification-priority and temperature-priority modes based on a fuzzy PID fusion algorithm. Adjustment weights are allocated in real time according to temperature and humidity deviations. Combined with dew point temperature modeling and complementary correction technology, it achieves synchronous and precise control of both parameters. A multi-sensor layout covers key locations, coupled with an adaptive self-calibration mechanism and data preprocessing function, ensuring the accuracy and stability of the collected data and adapting to various extreme temperature and humidity conditions. During mode switching, collaborative commands link various execution modules, avoiding humidity rebound after cooling shutdown or dehumidification failure during temperature control. The variable frequency speed control module uses an adaptive fuzzy PID algorithm with multi-input fusion to dynamically optimize speed parameters. Combined with a dynamic frequency step size adjustment mechanism, it achieves rapid response to large deviations and precise fine-tuning for small deviations.

The invention relates to a step-in type double-box body test box and a control method thereof. A gate lifting device is fixed in the middle of double box bodies; a channel is arranged between the double-box body and the gate lifting device; a moving platform is arranged in the channel; a servo dragging device is movably connected below the mobile platform; the servo dragging device drags the moving platform to any side of the double box bodies in the channel; the gate lifting device descends the heat insulation door, heat insulation is carried out on the double box bodies, the double box bodies are subjected to a temperature shock environment test, and the driving mechanism is isolated outside an extreme temperature and humidity environment. Through the layout design, the equipment structure is compact, and functional areas are clearly divided. The left cabin body and the right cabin body are consistent in structure and performance, box body shells are made of high-strength and good-heat-insulation-performance materials, heat transfer is effectively reduced, and the stability of the temperature in the cabin bodies is guaranteed. An air duct system is arranged in the cabin body, so that the temperature uniformity is ensured.

This invention provides an active heating method and system for a two-dimensional turntable servo mechanism, belonging to the field of laser communication technology. The method includes acquiring the feedback temperature and motor torque of the azimuth or pitch axis; when the motor torque is zero and the difference between the feedback temperature and the preset temperature is outside the preset temperature range, heating is performed by determining a first heating power based on the first d-axis current and the electrical control angle; when the motor torque is not zero and the difference between the feedback temperature and the preset temperature is outside the preset temperature range, heating is performed by determining a second heating power based on the second d-axis current and the q-axis current, until the temperature difference returns to the preset range and heating stops. This invention utilizes the heat generated by the motor's own current to replace external heating devices, achieving uniform heating from within, effectively reducing deformation and frictional torque fluctuations in key moving parts caused by temperature gradients, and improving the turning table's pointing accuracy and thermal stability under extreme temperature changes.

The invention discloses a thermal deformation pre-compensation method for a coreless superconducting cyclotron, and the method comprises the following steps: building a coreless high-temperature superconducting coil three-dimensional model which comprises a plurality of coils with different shapes and positions in the coreless high-temperature superconducting coil; carrying out a complete cooling process from 300K to 20K, and calculating form and position thermal deformation deviations of coils with different shapes and different positions in the model; pre-compensation calculation of the model is conducted through the form and position thermal deformation deviation; according to the pre-compensation amount at the low temperature of 20 K, the pre-compensation amount at the temperature of 300 K is reversely deduced, and the pre-compensation amount comprises a radial amplification coefficient and an axial amplification parameter; and iteration is repeated until the error between the 300K model with the pre-compensation amount and the design target is smaller than the error range. According to the method, the problems that in the prior art, the capability of accurately predicting the deformation behavior of the coil in the extreme temperature change process before the manufacturing stage is lacked, the positive design of pre-compensation cannot be actively carried out, and the basis of quantitative design is lacked are solved.

This application discloses a connector and a probe card for connecting a probe tip to a PCB board. The connector includes a connector body and a dielectric receiving tube disposed on the connector body. The dielectric receiving tube contains a dielectric medium with a specific heat capacity of not less than 1 KJ / (Kg·℃). This increased specific heat capacity of the connector improves thermal stability and reduces the impact of thermal disturbances on the PCB board from the probe tip side. On the one hand, when the system comes into contact with a heat source (or cold source), the temperature of the connector changes slowly, resulting in a relatively mild impact on the structure. On the other hand, when the system temperature reaches a steady state, it can smooth out disturbances caused by repeated contact and separation between the probe card and the wafer under test during the testing process. Ultimately, this helps to reduce or avoid thermal displacement and thermal deformation between components (such as between the connector and the probe tip), ensuring that the probe and chip pins correspond one-to-one under extreme temperature conditions (high and low temperatures) without misalignment.

The utility model provides an electric freight vehicle with temperature adjusting equipment, the temperature adjusting equipment comprises a compressor, an evaporator and a condenser which are connected through a refrigerant pipeline, and also comprises a PTC (Positive Temperature Coefficient) device, a warm air core and a pump which are connected through a coolant pipeline, the compressor is a compressor with single refrigerating capacity of more than 10KW, and the evaporator is a single compressor with single refrigerating capacity of more than 10KW. The evaporators comprise the first evaporator and the second evaporator, the first evaporator is in straight-through connection with the compressor and the condenser, the second evaporator is connected with the compressor and the condenser through an electromagnetic valve, and the electromagnetic valve is arranged in the mode that refrigerants only pass through the first evaporator or simultaneously pass through the first evaporator and the second evaporator in a controlled mode. The first evaporator and the second evaporator are arranged in a cab of the electric freight vehicle. According to the electric freight vehicle provided by the utility model, the temperature can be quickly adjusted under the extreme temperature condition.

The invention discloses a multistage thermoelectric refrigeration system temperature control method based on an optimal current ratio, and belongs to the technical field of control and adjustment. According to the method, under the condition of extreme temperature change of a space environment, the optimal current ratio of the multistage thermoelectric refrigerating unit is provided for the multistage thermoelectric refrigerating system by considering multiple index requirements such as the accuracy and the stability of temperature control and the refrigerating performance of the system, and the parameter is used as a constraint condition of temperature control, so that the optimal current ratio of the multistage thermoelectric refrigerating unit is obtained. The refrigeration performance of the refrigeration system is optimized; and on this basis, variables such as a current change interval and a current ratio error are introduced, decoupling control among the multi-stage thermoelectric refrigerating units is realized, PID control and fuzzy adjustment are performed on the upper-layer thermoelectric refrigerating unit and the lower-layer thermoelectric refrigerating unit respectively, and the high-precision and high-stability temperature control requirements under extreme environment temperature changes are met.

The invention relates to a testing device and method, and the testing device is used for testing a sample, and comprises a temperature control box, a clamping assembly, a stress loading assembly, and a testing assembly. A temperature control cavity is formed in the temperature control box; the clamping assembly is arranged in the temperature control cavity and is used for clamping a sample; the stress loading assembly is arranged in the temperature control cavity and can reciprocate relative to the temperature control cavity; the stress loading assembly partially extends out of the temperature control box and is used for clamping the other end of the sample; the testing assembly is arranged outside the temperature control box, the testing assembly is connected with the part, extending out of the temperature control box, of the stress loading assembly, and the testing assembly can measure the force borne by the stress loading assembly. The clamping assembly and the stress loading assembly are matched to simulate the internal stress of the material in practical application, and the defect that stress loading does not exist in a traditional body material test is overcome; the partial stress loading assembly and the test assembly are arranged outside the temperature control box, so that the influence of extreme temperature in the temperature control cavity on measured data can be avoided.

A kind of temperature measurement and control device for detecting space charge in extreme temperature environment pilot sample, comprising: original voltage signal measurement loop and sample temperature detection control loop characterized by space charge.This application only uses the original voltage signal characterized by space charge obtained by space charge-acoustic wave-voltage transformation under the excitation of polarization electric field and electric pulse superposition, based on the time delay of peak value in original voltage signal caused by the change of propagation speed of corresponding acoustic wave in different temperature ground electrode after the interface charge of sample / ground electrode, directly determines the actual temperature of sample, so as to realize the direct and accurate measurement of sample temperature without setting temperature sensor of electric signal and optical signal, finally, according to the comparison between actual temperature and set temperature, control the output of cold and hot output source, realize the accurate temperature control of sample.

The invention discloses a heating control joystick with intelligent temperature control and energy saving functions and a temperature control method. The heating control joystick is suitable for aviation aircrafts in extreme temperature environments. A temperature sensor, a heater and a multi-layer heat insulation and conduction structure are arranged in the operating rod, and self-adaptive temperature adjustment and efficient heating can be achieved. The MCU controls a low-power-consumption mode, energy-saving operation of equipment at a proper temperature is ensured, the self-checking module and the RS422 interface can carry out fault remote monitoring and diagnosis, and the safety and the use efficiency are improved.

The invention relates to a constant temperature control method and device for an optical crystal and a laser, and the control method comprises the following steps: S1, collecting the temperatures of at least two different positions of the optical crystal in real time, so as to obtain at least two actually measured temperature values reflecting the internal thermal state of the crystal; s2, acquiring at least one external disturbance parameter influencing the temperature of the optical crystal in real time; s3, based on the at least two actually measured temperature values, the external disturbance parameters and a preset target temperature, a control quantity is calculated through a compound control algorithm; and S4, according to the control quantity, driving a bidirectional temperature control actuator with heating and active refrigeration capabilities to adjust the temperature of the optical crystal. By constructing a double-point feedback-multi-mode feed-forward-bidirectional execution composite control architecture, the internal thermal gradient of the crystal is sensed in real time by utilizing double-point temperature measurement; various thermal disturbances are accurately counteracted in combination with feedforward compensation of laser power and environment temperature, and an actuator for active heating and rapid semiconductor refrigeration is integrated to realize millisecond-level bidirectional temperature control, so that the crystal steady-state temperature control precision is improved to + / -0.01 DEG C, the temperature stabilization time is remarkably shortened when the laser power suddenly changes, the anti-disturbance capability of the system is enhanced, and the service life of the system is prolonged. The crystal can keep extreme temperature stability for a long time under various working conditions, and finally the performance of the optical crystal and the long-term stability of the output power of a laser are greatly improved.

The utility model discloses a motor test load simulation device which comprises a supporting mechanism, a load tester and a motor body, the upper end of the supporting mechanism is provided with a heat preservation mechanism, the lower end of the supporting mechanism is provided with a temperature adjusting mechanism matched with the heat preservation mechanism, and the supporting mechanism comprises a detection table and a motor fixing frame. The motor body is fixedly installed on the motor fixing frame, an air inlet and an air outlet are formed in the position, close to the motor fixing frame, of the upper end face of the detection table, the heat preservation mechanism comprises a heat preservation cover and fixing bolts, and the heat preservation cover is arranged at the upper end of the motor body in a sleeving mode and rotationally connected with the detection table and fixed to the motor fixing frame through the fixing bolts. The temperature adjusting mechanism comprises a sealing box, an electric heating wire fan and a refrigerator. The motor test load simulation device has the advantages of rapid heating and cooling, uniform and stable temperature and convenient operation, and solves the problem that the motor test load simulation device cannot simulate an extreme temperature environment.

1. The name of the design product: high and low temperature liquid cooling test equipment. 2. The use of the design product: the high and low temperature liquid cooling test equipment of the design product is mainly used for simulating extreme temperature environment and rapidly and accurately controlling the temperature of the measured equipment. 3. The design points of the design product: in shape. 4. The picture or photo that can best show the design points: perspective view.

The present application relates to the technical field of temperature regulation, and particularly relates to an adaptive clothing fiber apparatus for temperature regulation. The apparatus comprises a multi-layer composite-structure fiber main body, an embedded intelligent regulation and control module, and a dynamic environment adaptation module, wherein the multi-layer composite-structure fiber main body sequentially comprises, from inside to outside, a thermally responsive layer, a deformation driving layer, a thermal conductivity enhancement layer and a protective compatibility layer, and generates deformation by means of sensing ambient temperature changes; the embedded intelligent regulation and control module implements heat conversion and intelligent control; and the dynamic environment adaptation module comprises a flexible piezoelectric sensor array, an airflow regulation and control channel and an electrostatic adsorption layer, and optimizes airflow regulation. The apparatus significantly improves the deformation response speed and temperature regulation accuracy of fibers under extreme temperature conditions, extends the endurance and service life thereof, and enhances the temperature regulation effect in complex dynamic environments.

The application provides a brake drum residual stress detection and shot blasting control parameter adaptive control method and system for an extreme temperature change environment, the method collects temperature, stress and strain data of the brake drum under extreme temperature change from room temperature to 600 DEG C through an embedded multi-source sensor array in real time; a finite element inversion algorithm of thermal-mechanical-phase change three-field coupling is used to dynamically reconstruct a three-dimensional residual stress field evolution model; based on the model, an optimal shot blasting parameter set is output through a multi-objective optimization decision model; a multi-nozzle collaborative control system is used to execute a differentiated shot blasting strategy, and adaptive processing is performed on the opening edge and the arc-shaped drum belly area of the brake drum; finally, quality parameters are detected online through a laser speckle interferometer and a microhardness tester, data is fed back to the decision model, a closed-loop control cycle is formed, and independent and continuous optimization of process parameters is realized, and the system correspondingly includes five modules of sensing detection, stress reconstruction, intelligent decision, execution control and quality feedback.

The invention discloses a vehicle temperature control method, a vehicle, a storage medium and a computer program product. The method comprises the steps that in response to a temperature adjustment control instruction, a temperature adjustment mode to be adopted in a target vehicle is determined, and the temperature adjustment mode is used for synchronously adjusting a plurality of temperature adjustment components configured in the target vehicle; and in the temperature adjusting mode, the multiple temperature adjusting components are synchronously adjusted according to the adjusting strategy corresponding to each temperature adjusting component in the multiple temperature adjusting components, a temperature adjusting result is obtained, and the temperature adjusting result is used for determining whether the internal temperature of the target vehicle is suddenly changed or not. The vehicle temperature control method solves the technical problems that a vehicle temperature control method provided in the related technology is tedious in adjusting process, low in response speed, poor in user experience and incapable of rapidly coping with extreme temperature changes.

The application discloses a method for determining the Debye temperature of a crystal material, and comprises the following steps: collecting the isobaric heat capacity data C P (T) of a crystal material in a temperature range; P (T) of the crystal material, and finding the temperature T0 corresponding to the extreme point of C P (T) by derivation; P (T) of the crystal material, and calculating the isochoric heat capacity C P (T) of the crystal material according to a thermodynamic formula; V (T) of the crystal material according to a Debye isochoric heat capacity evaluation model; V (T) of the crystal material according to the extreme temperature T0; P (T0) determined according to the extreme temperature T0 and the isochoric Debye temperature θ V (T0) of T0, and the temperature closest to the isochoric Debye temperature θ (T0) is the Debye temperature of the material. The method for determining the Debye temperature of the crystal material is simple and easy to implement, and can provide strong support for rapid evaluation and accurate design of material performance in the material research and development process.

The invention relates to the technical field of battery safety control, in particular to a battery thermal runaway prediction method, device, equipment and medium based on temperature stratification, and the method comprises the steps: obtaining the temperature data of each designated position in a battery pack; judging whether temperature stratification occurs in the battery pack based on the temperature data; if yes, whether a single outlier type layering temperature acquisition unit exists or not is judged, abnormal points are marked to obtain first feature data, whether a group layering type layering area exists or not is judged, and data are filtered to obtain second feature data; counting the proportion of the battery pack without temperature stratification at the extreme temperature to obtain third characteristic data; and predicting the thermal runaway probability of the battery based on the three types of feature data. The method can accurately identify early temperature abnormity, improve the accuracy and reliability of thermal runaway prediction, and guarantee the safety of the battery.

The application discloses a temperature representative value determination method and system, and relates to the field of statistics, which comprises the following steps: using a cubic interpolation method to fit and replace abnormal temperature data in a year, and using Gaussian filtering to perform smoothing processing; calculating a temperature difference and using an adaptive dynamic time warping (Adaptive DTW) and a mean Euclidean distance to obtain a difference distance matrix of temperature change characteristics of different months; using a weight parameter to combine the Adaptive DTW and the Euclidean distance, calculating a comprehensive distance matrix, performing a condensed hierarchical cluster analysis on the temperature change characteristics, and obtaining a plurality of temperature change modes; determining a typical summer temperature month and a typical winter temperature month according to the plurality of temperature change modes, and obtaining a daily extreme temperature difference therefrom; using a generalized extreme value distribution model to obtain a probability distribution of the daily extreme temperature difference in different return periods; and obtaining temperature action representative values in different return periods according to the probability distribution result. The application can accurately obtain temperature action representative values.

The invention relates to the technical field of meteorology and power system crossing, and discloses a national extreme temperature event detection method and system, and the detection method comprises the steps: calculating the temperature abnormal value and standard deviation multiple of each grid point of the whole country every day, and carrying out the statistics of the proportion of abnormal grid points of the same sign; if the proportion of the same-symbol abnormal grid points is greater than or equal to a first preset value and the proportion of the grid points with the absolute value of the standard deviation multiple greater than or equal to a second preset value in the same-symbol abnormal grid points is greater than or equal to a third preset value, determining that the event is a national consistent extreme temperature event; if the ratio of the grid points with the standard deviation multiple larger than or equal to the second preset value in each grid point every day is larger than or equal to a fourth preset value, and the ratio of the grid points with the standard deviation multiple smaller than or equal to the fifth preset value in each grid point every day is larger than or equal to the fourth preset value, it is judged that a nationwide anti-phase type extreme temperature event occurs. Based on a nationwide extreme temperature event judgment rule of a dual-space coverage threshold, accurate identification of a nationwide large-scale extreme temperature event is realized.

The utility model discloses a temperature alternating and pressure pulse testing device suitable for a new energy automobile heat exchange system, and relates to the technical field of testing devices. The device comprises a supporting frame, a hot water tank is arranged on the supporting frame, a transition water tank is connected to the supporting frame, a cold water tank is connected to the supporting frame, an electric box is arranged on the supporting frame, a water pump is fixedly arranged on the upper surface of the supporting frame, and a pipeline is connected to the water pump. Through an advanced temperature and pressure control system, the device can accurately simulate extreme temperature and pressure changes in actual working conditions, so that the performance and the reliability of parts are evaluated more accurately. The device also has high flexibility and applicability, can be applied to tests of various different types of heat exchange system components, and meets the requirements of different test conditions. Meanwhile, the test efficiency can be remarkably improved through the efficient test process, and rapid research and development and quality control are supported.