352 results about "Ice melting" patented technology

The invention relates to the technical field of electrical digital data processing, and discloses a train ice melting simulation optimization method of an electromagnetic thermal coupling model fused with a deep learning method, which comprises the following steps of: inputting a geometric representation tensor and a physical working condition parameter vector containing an electromagnetic excitation frequency and a reference environment temperature into a feature mapping neural network; outputting a dual-channel space source item tensor containing basic heat source power density and a heat source to temperature change sensitivity distribution matrix through nonlinear convolution operation; constructing a heat conduction discrete numerical value evolution operator configured with an active item linear correction interface; time stepping operation is executed according to the heat conduction time scale, a basic heat source is corrected in real time through the Hadamard product of a sensitivity distribution matrix and temperature deviation, and an operator is substituted for solution. On the premise that electromagnetic-thermal nonlinear coupling characteristics are reserved, decoupling of the time scale is achieved, and the calculation efficiency in high-frequency physical field simulation is effectively improved.

The invention relates to a tunnel portal road ice condensation model generation method based on artificial intelligence. According to the method, a multi-dimensional sensor network is deployed at a tunnel portal to collect environment and road surface data in real time, a characteristic variable set of quantitative humidity trap effects such as temperature gradient and humidity gradient is constructed, and then a dynamically weighted environment association graph structure is established according to the spatial position of a sensor; a graph neural network model is trained by using the graph structure to capture the spatial conduction rule and time evolution characteristics of microclimate parameters, and finally probability distribution output by the model is converted into a road freezing model, so that accurate positioning of a tunnel portal freezing high-risk area is realized, the spatial blind area of a traditional uniform distribution model is overcome, and the construction efficiency is improved. The early warning reliability is obviously improved, and a scientific basis is provided for accurate scheduling of ice melting resources.

The invention discloses a mobile contact network direct-current ice melting method, which comprises the following steps that: a monitoring vehicle and an ice melting vehicle are marshaled and run to a designated place, the two vehicles are de-marshaled, the ice melting vehicle is parked to the designated place, and the monitoring vehicle continues to run towards an ice melting section. The ice melting vehicle starts to electrically connect the wire clamp for construction after the contact network is subjected to electricity testing and grounding, and at the moment, the monitoring vehicle collects environment working conditions and icing state information in the ice melting section. And after construction of the electric connecting wire clamp and acquisition of monitoring information are completed, the monitoring vehicle sends an optimal ice melting current value to the ice melting vehicle, and the ice melting vehicle outputs an actual ice melting current after judging that the ice melting vehicle works normally. In the ice melting process, the monitoring vehicle reciprocates in the ice melting section, the icing degree of the contact network is monitored, and when it is monitored that icing disappears, an ice melting stopping instruction is sent to the ice melting vehicle. After ice melting is finished, the contact network is subjected to electricity testing and grounding at the ice melting vehicle, then the electric connecting wire clamp is removed, and the monitoring vehicle runs towards the ice melting vehicle. The technical problems that an existing overhead line system electric heating ice melting device is poor in mobility and low in utilization rate can be solved.

The invention relates to the technical field of external insulating materials for power equipment, in particular to silicone rubber, a preparation method thereof and application of the silicone rubber in a composite insulator. The silicone rubber is prepared from the following raw materials in parts by weight: 100 parts of methyl vinyl silicone rubber raw rubber, 5-20 parts of hydrophobic silicon dioxide aerogel powder, 3-15 parts of conductive and heat-conducting filler, 10-30 parts of modified aluminum hydroxide, 15-35 parts of fumed silica, 1-3 parts of a silane coupling agent and 2-5 parts of a structuring control agent, 1-4 parts by weight of a low surface energy auxiliary agent, and 0.5-2 parts by weight of a vulcanizing agent. The silicone rubber provided by the invention integrates long-acting hydrophobic anti-icing, active low-power-consumption ice melting and excellent arc ablation resistance, has long-term stability, and is especially suitable for high-voltage insulators in severe environments such as heavy ice areas and heavy dirty areas.

The invention relates to the technical field of ice prevention and disaster reduction of high-voltage power transmission lines, and discloses a cascaded direct-current ice melting system of a high-voltage power transmission line, a control method and a device. The method comprises the following steps: inputting a test signal to the cascaded direct-current deicing system, and detecting the voltage and current of each node; calculating line impedance distribution based on the voltage and current of each node, and constructing a line equivalent model; calculating the minimum ice melting current based on the ice thickness monitoring data and the weather data, and calculating the output current of each ice melting device based on the minimum ice melting current and the line equivalent model; monitoring circulating current between systems, and calculating virtual compensation voltage based on the circulating current; and adjusting the output voltage of each ice melting device based on the virtual compensation voltage. The ice melting success rate, the safety of the system and the service life of the system can be improved.

A miniature ice melting device for a high-voltage line comprises an ice melting body, a span string crossing part, an anchor section crossing part, a power source and power supply module, an electric energy obtaining module and a deicing driving module, and is used for obtaining electric energy from a contact line of a railway contact network through the electric energy obtaining module and providing the electric energy for ice melting work of the ice melting body. The deicing driving module and the power supply and power supply module are used for pushing the high-voltage line miniature ice melting device to advance on a contact network, the span string crossing is used for passing through a contact network dropper and a positioner, and the anchor section crossing is used for enabling the high-voltage line miniature ice melting device to smoothly pass through a contact network anchor section joint. The miniature ice melting device for the high-voltage line can continuously deice in a reciprocating manner for a long time in an electric split phase, and meanwhile, the anchor section can move to a catenary bracket led out from a non-working branch of the catenary in advance when a motor train unit or an electric locomotive passes through, so that the influence of deicing equipment on normal operation of the train is avoided, and the working efficiency is improved. The miniature ice melting device for the high-voltage line can save a large amount of manpower and material resources for deicing, and meanwhile, the miniature ice melting device for the high-voltage line can also be used for deicing on other high-voltage lines through simple transformation.

The invention relates to the technical field of road maintenance equipment, in particular to a viaduct ice and snow active identification and removal method and equipment based on deep learning, and aims to realize high-precision and low-delay identification of ice at the bottom of a bridge by replacing a standard convolutional layer in a YOLOv8 backbone network with a GSConv module and constructing a lightweight target detection model; by means of the identified and output position coordinates and size information, the infrared heating plate is guided to be accurately aligned with the root of the ice hanging part, heating parameters are dynamically adjusted, and the ice hanging part naturally falls off after being heated; falling ice blocks enter an ice melting box with a heating layer at the bottom through a collecting tank and a conveying pipeline, are instantly melted into water and are discharged through a drainage pipe, and a closed-loop clearing process without ice storage is formed. Manual intervention is not needed, the bridge body is prevented from being damaged by mechanical impact, the overturning risk of equipment caused by ice storage is eliminated, and the safety, efficiency and automation level of deicing operation are remarkably improved.

This invention discloses a winter de-icing blanket for highways and its application method, belonging to the field of road maintenance technology. The de-icing blanket comprises a flexible, rollable blanket body, with a waterproof layer, a heating layer, and a moisture-absorbing and heat-storing layer layered sequentially from top to bottom. The moisture-absorbing and heat-storing layer has both heat-storing and water-absorbing structures, simultaneously storing heat and absorbing moisture generated during ice melting. In use, the de-icing blanket is laid on the ice surface; after being powered on, the heating layer generates heat, which melts the ice and absorbs the melted water. The heat-storing structure helps maintain the temperature. After use, it can be dried at high temperature for storage and reuse. This invention integrates de-icing, water absorption, and heat storage functions, offering high de-icing efficiency, environmental friendliness, and ease of storage and transportation, making it suitable for winter road de-icing operations.

A distributed ice melting device topological structure suitable for an ultra-high voltage power transmission line comprises a plurality of ice melting sub-modules arranged in a distributed mode, and each ice melting sub-module comprises a single-turn coupling transformer, a metal oxide voltage limiter, a bypass switch, a filter, an H-bridge current converter and a direct-current capacitor. A primary winding of the single-turn coupling transformer is directly formed by split sub-conductors of the ultra-high voltage power transmission line, and a secondary winding of the single-turn coupling transformer is electrically connected with other parts of the ice melting sub-modules, so that the ice melting sub-modules are connected in series on the split sub-conductors of the power transmission line in a distributed manner; the H-bridge current converter is electrically connected with the direct-current capacitor, and the direct-current capacitor provides smooth direct-current voltage for the H-bridge current converter; the filter is connected in series with the H-bridge current converter, the bypass switch is connected in parallel with the H-bridge current converter, and the metal oxide voltage limiter is connected in parallel with the line side output end of the ice melting sub-module; and the ice melting sub-modules adjust the current of the corresponding split sub-conductors by changing the equivalent impedance of the ice melting sub-modules, so that accurate ice melting of the ice-coated split sub-conductors is realized, and the overall current and the transmission power of the power transmission line are kept unchanged. The technical problem to be solved by the invention is to provide the distributed ice melting device topological structure suitable for the ultra-high voltage power transmission line, and the technical problem that the existing ice melting technology cannot realize accurate ice melting and non-power-cut operation on an ice coating section on the ultra-high voltage power transmission line is solved. And normal transmission of the line is affected due to overlarge capacity demand, line overcurrent or incapability of three-phase synchronous ice melting.

The application discloses a metro flywheel energy storage system with a direct current ice melting function, which comprises a medium voltage looped network, a contact network, a running rail and positive and negative bus lines, and further comprises a metro rectification module and a flywheel energy storage module; the metro rectification module is connected with the positive and negative bus lines; the positive bus line is connected with the contact network, and the negative bus line is connected with the running rail; the flywheel energy storage module is connected with the positive bus line, the negative bus line and the running rail respectively; the flywheel energy storage module is further connected with the contact network through a circuit breaker QF, and the contact network and the running rail are connected through a remote short-circuit switch K3. The application further discloses an ice melting and energy storage method using the metro flywheel energy storage system with the direct current ice melting function. The application has both the direct current ice melting function and the flywheel energy storage charging and discharging function, the two functions are time-multiplexed through switch control, efficient utilization of the equipment is realized, and the performance-price ratio is improved.

The utility model relates to the technical field of ice making, and solves the problems that when ice blocks are not used up, the ice blocks are melted in an ice making assembly, and the melted water is not collected by a worker, so that water resources are wasted. The ice making assembly comprises a storage frame, a sliding groove is formed in the storage frame, a sealing plate is slidably connected into the sliding groove, a placement frame is clamped into the storage frame, connecting plates are fixedly installed on the two sides of the surface of the placement frame, and a collecting assembly is arranged at the bottoms of the connecting plates. A water tank is fixedly installed on one side of the surface of the storage frame, a guide pipe is arranged on one side of the top of the water tank, an ice maker used for making ice is arranged at one end of the guide pipe, the ice maker is fixedly installed on the back of the storage frame, and the collecting assembly comprises a collecting frame fixedly installed on the surface of the connecting plate; a water pump is fixedly installed on one side of the surface of the collecting frame, and a flow guide pipe is fixedly installed at the output end of the water pump.

The invention relates to the technical field of electric power meteorological disaster prediction, and particularly provides a power grid extreme freezing rain quantitative short-term and temporary early warning method and device, and the method comprises the steps: taking the meteorological element data, topographic feature data and freezing rain cumulative prediction amount of a region as the input of a pre-trained physical constraint deep learning model; obtaining a freezing rain accumulated correction output by a pre-trained physical constraint deep learning model; determining a freezing rain cumulative forecast quantity of the region based on the freezing rain cumulative correction quantity; and performing power grid extreme freezing rain quantitative short-term and temporary early warning on the region based on the freezing rain accumulated forecast quantity of the region. According to the technical scheme provided by the invention, the early warning precision and response efficiency of the power grid under the extreme freezing rain condition can be remarkably improved, and a scientific decision basis is provided for power system safety scheduling, emergency ice melting and equipment risk management and control.

The present application relates to the technical field of ventilation pipe, in particular to an assembled composite ventilation pipe for large factory building, which comprises a transverse ventilation pipe, an adapter pipe, a longitudinal ventilation pipe and a wall, a water collecting box is arranged at the bottom of the transverse ventilation pipe outside the wall, the water collecting box is used for collecting ice water from the inner wall of the longitudinal ventilation pipe to prevent the ice water from flowing back to the inside of the transverse ventilation pipe, a water guiding mechanism is movably arranged in the water collecting box, the water guiding mechanism supports the ice water during the water collecting stage and releases the ice water when the liquid level in the water collecting box reaches a preset weight. The melted ice water is collected by the water collecting box, which prevents the ice water from staying in the transverse ventilation pipe and affecting the exhaust. Moreover, the gravity of the collected ice water drives the water guiding plate and the adjusting plate to move downward synchronously, and the guide plate rotates outward to guide the hot air flow to blow against the inner wall of the longitudinal ventilation pipe, which improves the ice melting effect and increases the pressure in the transverse ventilation pipe to improve the discharge speed of the ice water on the water guiding plate.

The invention discloses an opencast coal mine coal spontaneous combustion incubation period prediction method suitable for a negative temperature condition, and relates to the technical field of coal spontaneous combustion prediction. The method comprises the following steps: firstly, carrying out an oxygen adsorption dynamic experiment on a to-be-detected coal sample at a constant temperature of-20 to 100 DEG C to obtain a low-temperature oxygen adsorption rate constant and establishing a function relationship between the low-temperature oxygen adsorption rate constant and the temperature; secondly, calculating ice melting latent heat according to the ice content in the coal sample to be detected, and introducing the ice melting latent heat as a key energy loss item into the heat-mass transfer model of the coal pile; further, establishing a coal pile energy balance equation comprehensively considering oxidation heat release, ice melting latent heat consumption and a heat dissipation process; and finally, solving the equation through a numerical method, and calculating the time required by the coal pile from the initial negative temperature rise to the critical spontaneous combustion temperature so as to obtain the accurate coal spontaneous combustion latency. The method is particularly suitable for mines in cold regions, surface mines and winter coal storage yards.

The invention discloses a micro-terrain power transmission line ice melting calculation method considering solar radiation, relates to the technical field of electric engineering power transmission, and solves the problem that a natural heat source of solar radiation cannot be fully considered and accurately utilized when the ice melting problem of a power transmission line is evaluated in the prior art. View field analysis, a shielding coefficient and a line posture correction coefficient are introduced, the actual solar radiation amount received by the power transmission line in the complex mountain area micro-terrain environment is calculated, resource waste or potential safety hazards caused by evaluation deviation are avoided, and the ice coating ablation accuracy is improved by accurately quantifying the ablation effect of the solar radiation on the ice coating. A natural ice melting strategy is provided for operation and maintenance of a power grid, so that dependence on a high-energy-consumption active ice melting technology is reduced, and economical efficiency of ice melting of the power transmission line is improved. In addition, the method can generate a temperature space distribution diagram along the direction of the line, and provides high-precision scientific guidance for routing inspection of the power transmission line, making of an ice melting strategy, planning and design of the line and safe operation and maintenance.

The application discloses a control method of a power distribution line ice melting device, which adopts the power distribution line ice melting device to melt ice, and the ice melting device comprises a parallel side converter, a series side converter, an energy storage capacitor, a parallel side transformer and a series side transformer, the energy storage capacitor is connected between the parallel side converter and the series side converter, the parallel side converter is a three-phase converter, absorbs active power of a fundamental frequency from the power distribution network through the parallel side transformer, the series side converter is a single-phase converter, generates non-fundamental wave current, and injects the non-fundamental wave current into a first end of a line to be melted through a neutral point of the series side transformer to generate Joule heat in the line to be melted to melt ice without power-off operation. Compared with the traditional method, the application can effectively reduce the interference on the power grid, reduce the ice melting cost, and improve the stability and reliability of the system.

The invention provides a power distribution network power supply recovery method considering node importance and recovery dependence. The method comprises the following steps: 1) obtaining fault information of a power distribution network in real time; 2) comprehensively evaluating the importance weight of each node by adopting a comprehensive weight method combining an analytic hierarchy process and an entropy weight method; 3) using a reverse breadth-first search algorithm from the fault points to identify a repair dependency relationship among the fault points, and determining an upstream fault set which needs to be repaired firstly when any fault point is repaired; 4) quantifying the reduction amount of the ice melting device deployed before the disaster on the fault recovery time, and correcting the fault recovery time of each fault point in the fault set; 5) constructing a repair sequence optimization model with the goal of minimizing the total weighted load loss amount; 6) solving the repair sequence optimization model by the scheduling control center by adopting an improved genetic algorithm, and generating an optimal sequence for fault repair; and 7) dynamically adjusting the optimal sequence of fault repair.

The invention discloses a high-voltage power ice-melting overhead line, and relates to the technical field of cables, a protective ice-melting assembly is mounted on the outer side of an inner wire, air outlet pipes uniformly penetrate through the outer side of an outer heating box, a silicon rubber ring is adhered to the interior of the outer heating box, a spiral heat conduction layer wraps the outer side of a middle insulating layer, and air holes are uniformly formed in the outer side of the spiral heat conduction layer. A spiral heat conduction layer is arranged on the outer side of the outer heating box, a heating wire is wound in a gap of the spiral heat conduction layer, the outer side of the spiral heat conduction layer is coated with an outer insulation layer, the outer side of the outer insulation layer is coated with a protective film, and an auxiliary deicing assembly is installed on the outer side of the protective film. When the internal air pressure is increased, the deformation grooves are pushed to bulge towards the outer side, under the dual effects of heating melting and inner side extrusion, an ice layer on the outer side of the cable is easier to crack and break away from the outer side of the overhead line, deicing is accelerated, the deicing efficiency is higher, and the mode needs less heat and consumes less energy.

The utility model discloses an ice storage air-conditioning system which comprises a refrigeration host (1), a freezing pump (2), an ice melting pump (3), a heat exchanger (6), an ice storage device (7), an electric valve V1 (4) and an electric valve V2 (5), and is characterized in that an inlet of the refrigeration host (1) is connected with an outlet of the freezing pump (2); an outlet of the refrigeration host (1) is divided into two paths through a branch pipeline, one path is connected with an inlet of the V2 electric valve (5), and the other path is connected with a port A of the ice storage device (7); and an inlet of the freezing pump (2) is connected with a primary side outlet of the heat exchanger (6), an inlet of the ice melting pump (3) and an outlet of the V1 electric valve (4). By optimizing the pipeline layout and arranging the independent ice melting pump, five operation working condition modes of ice-making cold storage, ice melting cold supply, refrigeration cold supply, combined cold supply and ice-making and cold supply can be achieved only through two electric valves. The system structure is simplified, energy consumption and control complexity are reduced, and the system is suitable for commercial and industrial buildings and has remarkable economical efficiency and popularization value.

The utility model relates to food production equipment technical field, concretely relates to a kind of coconut milk ice block feeding material device, including tank, stirring motor and support, tank and stirring motor are all fixed on support, tank is located above stirring motor, a shearing assembly is equipped in tank, shearing assembly connects stirring motor;Tank has hot water inlet, feeding port, discharge port and cleaning port, several are all communicated with the inner chamber of tank, hot water inlet, feeding port and cleaning port are all set in the top of tank, discharge port is set in the bottom of tank.The utility model realizes the ice feeding and ice melting device of integrated structure, both solves the problem of traditional ice crusher production cleaning, reduces the risk of microbial overproof, and also simplifies production procedure, improves production efficiency.

The utility model provides a novel air intake manifold structure, including air intake manifold, the lateral wall of air intake manifold is connected with the air intake branch pipe of multiple and intercommunication, the one end of air intake manifold is the opening of air throttle body connection, the liquid pool chamber that sets up downward away from the opening of air intake manifold, the inner wall of air intake manifold is seted up with the strip shape water inlet hole of liquid pool chamber intercommunication along its length direction, air intake manifold has the electric heating cover, the bottom of liquid pool chamber is seted up with the drain hole of not being stopped by electric heating cover, the outer wall of liquid pool chamber is provided with the dust screen cover of covering drain hole. The utility model discloses, adopt the design of automatic ice melting and automatic drainage, can effectively prevent the icing in air intake manifold, avoid because icing influence engine's inflation efficiency and power output.

The invention relates to the technical field of power system safety protection, and particularly provides a power grid transmission line ice melting thickness prediction method and device based on numerical simulation. Comprising the following steps: substituting numerical values of ice melting influence parameters of the power grid transmission line into a pre-constructed convective heat transfer coefficient calculation formula, and calculating a convective heat transfer coefficient of the power grid transmission line; determining the ice melting thickness of the power grid power transmission line based on the convective heat transfer coefficient of the power grid power transmission line; wherein the pre-constructed convective heat transfer coefficient calculation formula is obtained in a numerical simulation mode. According to the technical scheme provided by the invention, quantitative and accurate prediction of the ice melting thickness under the dynamic meteorological condition can be realized.

The invention relates to an on-line ice preventing / melting method for a railway overhead line system powered by a star-delta transformer. The method comprises the following steps that the star-delta transformer is transformed; calculating corresponding required phase differences under different ice melting current values; the phase difference is used for judging the required transformer ice melting gear K at the moment; selecting a proper number of windings according to the K value in the third step; adjusting the number of turns of the corresponding winding of the transformer according to the winding turn value in the fourth step; and switching on the isolation switch of the partition post to melt ice. The method has the beneficial effects that the phase shifting function of the adjusted transformer is utilized, so that the traction power supply system forms circulating current to melt ice, normal operation of a train in extremely cold weather such as freezing rain is ensured, and large-area train shutdown caused by icing of a contact network is avoided.

The invention relates to the field of power grid maintenance, in particular to a wind power current collection line ice melting device and an ice melting method thereof. The device comprises a mechanical active deicing mechanism and a movable ice melting mechanism, the movable ice melting mechanism is arranged on one cable of a wind power current collection circuit, at least two wind-resistant mechanisms are arranged on the movable ice melting mechanism through a rotating elevator, and each wind-resistant mechanism comprises a rotating assembly, a telescopic assembly and a limiting assembly. The limiting assembly is arranged on the adjacent cables, the limiting assembly is connected with one end of the telescopic assembly, the telescopic assembly is installed on the rotating assembly, meanwhile, the invention discloses an ice melting method based on the device, the movable ice melting mechanism is provided with the two wind-resistant mechanisms through the rotating elevator, and the two wind-resistant mechanisms are connected with the other two cables; and the wind resistance is improved. And meanwhile, the position of the movable ice melting mechanism is replaced through the two wind-resistant mechanisms and the rotary elevator.

This invention belongs to the field of heat exchanger technology, specifically relating to a double-layered counter-current flow channel functional heat exchange module and heat exchanger. The heat exchange medium flow channels of this invention are arranged in a sequentially stacked structure of a first main flow channel, a first auxiliary flow channel, a second auxiliary flow channel, and a second main flow channel. The first main flow channel and the first auxiliary flow channel are interconnected to form an upper heat source cavity, and the second main flow channel and the second auxiliary flow channel are interconnected to form a lower heat source cavity. Within the same heat source cavity layer, the flow area of ​​the main flow channel is larger than that of the auxiliary flow channel, and the main flow channel and the auxiliary flow channel intersect each other, so that the intersection points form interconnected points. Along the stacking direction of the flow channels, the second auxiliary flow channel is adjacent to the first main flow channel, and the second main flow channel is adjacent to the first auxiliary flow channel, with a gap between the upper heat source cavity and the lower heat source cavity. This invention ensures the self-cleaning function of the icing area through the combined action of "mixed ice melting" and "heat exchange ice melting".

The invention is suitable for the technical field of direct-current ice melting, and discloses a direct-current ice melting control method, system, equipment and medium for a hybrid MMC of various lines of a transformer substation, and the method comprises the steps: obtaining an ice melting request of an outgoing line, comparing the sum of ice melting current target values of all lines with the maximum output capability of a full-bridge and half-bridge hybrid MMC direct-current ice melting system, generating an ice melting time sequence strategy; based on the ice melting request, the system is controlled to be switched from a reactive compensation mode to a direct current ice melting operation mode, direct current side voltage and current return-to-zero control is started, then the direct current reference value return-to-zero control is quitted, and ice melting is carried out on the current line; if a fault point is detected in the ice melting process, direct current side fault ride-through is executed; and if the line to be de-iced still exists, restarting the direct current reference value return-to-zero control to de-ice until no line to be de-iced exists, and switching to a reactive compensation mode. Automatic sorting and start-stop when the plurality of outgoing lines need to be de-iced are realized, and safe and stable operation of a power distribution network is ensured.

The application discloses a kind of electric testing grounding ring loosening fault monitoring method and system, specifically related to overhead line hardware mechanical connection state monitoring technical field, to solve the problem that existing method is difficult to identify early fretting wear of electric testing grounding ring connection interface from environmental interference under icing and ice melting alternating conditions;By obtaining the temperature signal and strain signal at the connection interface of aluminum wire clamp and copper grounding body, the temperature slowly varying trend component, strain slowly varying trend component and strain high frequency component are obtained by empirical mode decomposition, a temperature-strain hysteresis curve is constructed based on the temperature slowly varying trend component and strain slowly varying trend component, and the envelope area is calculated, when the envelope area is greater than the preset reference area, the rising edge steepness of local peak points in each segment of strain high frequency component and the signal energy ratio of the front and rear time periods are extracted to form statistical distribution characteristics, and the statistical distribution characteristics are matched with the pre-stored stick-slip characteristic template to determine whether fretting wear occurs at the connection interface.

The utility model relates to the technical field of snow melting devices, and discloses a snow melting device for a road, which comprises a frame body fixedly mounted on one side of a tractor; one side of the frame body is fixedly connected with a side plate; an ice melting hopper is hinged to one side of the side plate, an electric heating pipe is fixedly installed in the ice melting hopper, and the ice melting hopper is electrically connected with a diesel generator fixedly installed on the ice melting hopper. When the ice melting device is used, water is filled into the ice melting hopper, the diesel generator on one side of the ice melting hopper is started, the electric heating pipe is powered on, water in the electric heating pipe is heated, then the ice melting hopper is pulled through the tractor, continuous heat transfer ice melting operation can be conducted on an ice layer on the road surface, damage to the road surface is reduced, and the snow melting cost is reduced; the ice melting bucket and the side plate can be integrally disassembled only by screwing the first threaded rod, driving the moving block to move downwards and pushing the connecting plate, so that the sliding block moves downwards along with the connecting plate until the sliding block moves out of the base body, and the ice melting bucket and the side plate are conveniently and quickly disassembled.

The application discloses a low-temperature water production method of an air water generator. When the ambient temperature is low, the water contained in the airflow is actively controlled to freeze on a condenser, so that the water in the air is collected. When the amount of ice in the condenser reaches a set range, the compressor is turned off, and the condenser no longer has a refrigeration effect. At this time, the air inhaled from the external environment is used to exchange heat with the ice in the condenser, so that the technical purpose of accelerating ice melting is achieved. Thus, the technical purpose of using the existing air water generator to produce water in a low-temperature environment is achieved. Without changing the hardware structure of the existing air water generator, the use temperature range of the air water generator can be extended to a low-temperature environment of 0-15 DEG C. Not only is the use temperature range of the air water generator expanded, but also the use geographical range of the air water generator is expanded.