27 results about "Thermal cycle test" patented technology

The embodiment of the invention provides a satellite test control method and device, control equipment and a test box. The method comprises the following steps: setting a satellite in a test box in a normal pressure state, and determining a target temperature based on a temperature change rate of a satellite component in the test box in a process of operating the test box in advance; and then, in the process of controlling the test box to operate at the target temperature, obtaining operation data of the satellite in the test box, and obtaining a test result of the satellite. A normal-pressure thermal cycle test is provided, more equipment is not needed to maintain a vacuum environment for satellite test, and the cost of satellite test is reduced; under the normal pressure condition, the satellite can be tested conveniently and quickly, the satellite testing period is shortened, and the satellite testing time cost is reduced.

This utility model relates to a water-cooling testing device, disclosing a passive water-cooled plate and a water-cooling testing device for passive thermal cycling testing of IGBT devices. It includes a passive water-cooled plate body, which comprises a water-cooled plate flow channel layer and a water-cooled plate heating layer. The flow channel layer of the water-cooled plate has a first guide cavity and a second guide cavity. An S-shaped first guide plate unit is placed in the first guide cavity, and an S-shaped second guide plate unit is placed in the second guide cavity. This utility model forms two independent but interconnected circulation loops by setting the S-shaped guide plate units. This design increases the water channel length, prolongs the contact time between the coolant and the hot and cold plates, and improves heat exchange efficiency. At the same time, the S-shaped structure makes the coolant distribution more uniform inside the hot and cold plates, effectively avoiding the problem of localized overheating.

The invention provides a multi-temperature-field automatic thermal cycle test device and a test method thereof. The multi-temperature-field automatic thermal cycle test device comprises an automatic material conveying unit, a high-temperature environment field unit, a low-temperature environment field unit, a room-temperature environment field unit, an electrical control unit and an outer frame platform unit, the automatic material conveying unit comprises a lifting storage rack, a lifting operation mechanical arm and a rotating main shaft; the high-temperature environment field unit comprises a high-temperature environment box body which can be opened and closed, and an electric heating element is mounted in the high-temperature environment box body; the low-temperature environment field unit comprises a low-temperature environment box body which can be opened and closed, and a liquid nitrogen refrigerating device is mounted in the low-temperature environment box body; the room temperature environment field unit comprises a room temperature field fan. A plurality of temperature fields are adopted, a refrigerating medium is used for achieving rapid cooling at the low temperature, a heating wire is used for achieving rapid heating at the normal temperature in the air environment and at the high temperature, the multiple temperature fields are provided at the same time or different temperature fields can be rapidly switched, and thermal cycle test research under large-range temperature changes can be carried out.

A copper-ceramic bonded body obtained by bonding a copper member having a Cu content of 99.96% by mass or more and a ceramic member, the copper-ceramic bonded body having a Cu content of 99.96% by mass or more, after a thermal cycle test in which 3000 cycles are performed as one cycle by holding the copper member at-65 DEG C for 5 minutes and holding the copper member at 150 DEG C for 5 minutes in a liquid bath, the copper-ceramic bonded body having a Cu content of 99.96% by mass or more and a ceramic member having a Cu content of 99.96% by mass or more. The average crystal grain size in a cross section in the thickness direction of the copper member is 100 [mu] m or less.

The invention discloses an in-situ thermogravimetric and corrosion thermal cycle testing device, which relates to the technical field of thermal cycle testing devices, and comprises a base, a reaction tube, a placement table and a heating movable furnace, the reaction tube is horizontally arranged, and the axial direction of the reaction tube is parallel to the length extension direction of the base; the object placing table is positioned in the reaction tube and is used for fixing a sample to be tested. The heating movable furnace is arranged on the base in a sliding mode in the axial direction of the reaction tube, the heating movable furnace can enclose or be separated from the reaction tube when sliding in a reciprocating mode, the heating movable furnace is provided with a heating wire, and when the heating movable furnace enclose the reaction tube, the heating wire can heat a sample in the reaction tube. According to the invention, the reaction tube is horizontally arranged, and the heating movable furnace slides along the axial direction of the reaction tube to enclose or separate from the reaction tube, so that a test mode that a sample is static and a temperature field is movable is realized; the position of the sample is always fixed, the switching between the high-temperature heating area and the cooling area is completed only by sliding and heating the movable furnace, and the sample testing precision is high.

The invention discloses an aluminum alloy cable accessory conductor material with high thermal cycle performance and a preparation method thereof, and relates to the technical field of aluminum alloy conductor materials. The conductor material comprises the following components in percentage by mass: 0.5-1.5% of Si, 0.05-0.15% of Mg, 0.07-0.08% of Fe, 0.05-0.1% of Cu and the balance of Al and inevitable impurities, wherein the mass ratio of Si to Mg is controlled to be (10-30): 1; through component optimization and process innovation, the relation between the conductivity and the thermal cycle performance of a conductor material is effectively balanced, the thermal cycle performance of the material is remarkably improved, the use requirement of a power transmission conductor in a specific environment is met, and in 1000 times of thermal cycle tests carried out according to the GB / T 9327-2008 standard, the excellent resistance stability is shown, and the thermal cycle performance of the conductor material is greatly improved. The resistance ratio variation D is less than or equal to 0.10, the average dispersion beta is less than or equal to 0.25, and the conductivity is more than or equal to 62% IACS, so that the composite material is particularly suitable for cable connection fittings with strict requirements on long-term electrical connection stability.

A copper-ceramic bonded body (10) obtained by bonding a copper member (12, 13) having a Cu content of 99.96 mass% or more and a ceramic member (11), the copper-ceramic bonded body (10) being obtained by observing a cross-section in the thickness direction of the copper member after a thermal cycle test in which 3000 cycles are performed as one cycle by holding the copper member (12, 13) at-65 DEG C for 5 minutes and holding the copper member (12, 13) at 150 DEG C for 5 minutes in a liquid tank. The ratio (C / D) of the ratio (C) at which the KAM value in a measurement field of view disposed centered on the triple point of the grain boundary is 0.25 DEG or less to the ratio (D) at which the KAM value in the crystal grains is 0.25 DEG or less is within the range of 0.93-1.05.

The invention particularly relates to a polyimide flexible composite film for spaceflight and a preparation method of the polyimide flexible composite film. The polyimide flexible composite film for spaceflight comprises an optical function layer, a supporting layer, a bonding layer and a reinforcing layer which are sequentially stacked. According to the invention, through the design and preparation process of the four-layer structure composite film, the product weight reduction is realized, the weight is reduced compared with the existing product, and the launch cost of a spacecraft can be reduced; the heat control performance is good, the solar absorption ratio of an aluminized surface is low, the hemispherical emissivity is low, the alpha s / epsilon h ratio is small, and the heat control characteristic is superior to that of a traditional aluminized film; an ultra-thin structure design is adopted, and the thickness is smaller than that of existing similar products; by introducing the silicon dioxide protective layer, the tolerance of the aluminum layer to atomic oxygen is improved, the service life of the material in a space environment is prolonged, the optical performance change is small after a thermal cycle test, and the material has good environmental adaptability; meanwhile, certain electromagnetic shielding capability is achieved, and the aerospace application requirement can be met.

This utility model relates to a water-cooled testing device, disclosing a testing system for a water-cooled plate used in passive thermal cycling testing of IGBT devices. The system includes a water-cooled plate with a heating unit and a cooling unit. The key feature is the inclusion of a main control unit. The heating unit heats the water and sends signals to the main control unit, while the cooling unit cools the water and sends signals to the main control unit. The main control unit processes the received signals and feeds back control signals to the cooling and heating units. This utility model's testing system can simultaneously evaluate the heating and cooling performance of the water-cooled plate in a single test, improving testing efficiency. Through independent dual over-temperature detection technology, it achieves safety protection and rapid over-temperature cutoff for the testing platform, thereby improving testing accuracy and safety and shortening the testing cycle.

This invention discloses a smart meter durability testing device, belonging to the field of meter testing technology. It includes a test stand, on which a simulation test unit, a tightening variable control unit, and a data observation unit for detecting test results are installed. This invention uses high and low temperature testing, damp heat cycling testing, and salt spray corrosion testing modules in the simulation test unit to simultaneously simulate multiple extreme environments, accurately assessing the durability of the meter under complex operating conditions. Through a magnetically controlled connector combined with a tightening motor, the tightening stroke and pressure of the terminal screws can be precisely controlled, thereby exploring the impact of different tightening forces on the durability of the smart meter's terminals. A digital display power monitor synchronously records power consumption with the smart meter, directly comparing the test data with the actual value to quickly identify metering deviations. A camera periodically captures data from the display screen, tracking the meter's performance changes at different test stages and accurately locating the time point of failure.

The present application belongs to the technical field of seal manufacturing and inspection, and particularly relates to a manufacturing and inspection method of a double-cone type metal seal ring for a nuclear reactor. The manufacturing and inspection method of the double-cone type metal seal ring for the nuclear reactor comprises the following steps: S110, preparing a plate material of a predetermined size; S120, turning a front end face; S130, turning a back end face; S210, performing hardness, air tightness, water pressure and thermal cycle test detection on the manufactured double-cone type metal seal ring. Through the improvement of the manufacturing process and the evaluation standards of the hardness, air tightness, water pressure and thermal cycle test, the performance of the double-cone type metal seal ring can be effectively verified, the frequent replacement due to the quality problems of the double-cone type metal seal ring can be avoided, and the production efficiency of the nuclear power plant is improved.

The invention discloses an infrared transmission performance real-time monitoring and evaluation method based on temperature field reconstruction, and relates to the field of temperature field measurement, and the method comprises the steps: building a fluid-solid coupling simulation model of a flexible cold cabin and low-temperature nitrogen in the flexible cold cabin, and verifying and optimizing the simulation model through a low-temperature thermal cycle test; calculating temperature values and pressure values under different working conditions by utilizing the simulation model, and taking the temperature values and the pressure values as a sample library; a neural network prediction model based on the simulation model is constructed and trained; acquiring a temperature value and a pressure value outside an infrared beam transmission range, and predicting the temperature value in the infrared beam transmission range by using the model; and calculating an infrared light transmission evaluation index by using the prediction data, and displaying the temperature value and the evaluation index in real time. Temperature field distribution in the light beam is obtained by establishing internal and external temperature field data of the light beam under different working conditions and using the neural network model to reconstruct the temperature field, and the method can be widely applied to a test system for obtaining a large amount of point location data through a small number of sensors.

[PROBLEM]The present invention provides a resin composition suitable for forming an optical member including an optical waveguide that has a low refractive index and exhibits no cracking in a heat cycle test. Further provided are an optical waveguide comprising a cured product of the resin composition, an opto-electric hybrid board comprising the optical waveguide, and a device comprising the opto-electric hybrid board. [SOLUTION]The resin composition for forming an optical member comprises (a) a siloxane polymer having an unsaturated bond-containing group, (b) surface-modified silica nanoparticles, (c) a photopolymerization initiator, and (d) a polyfunctional thiol compound.

A turbine blade and related methods are disclosed. The blade includes: an airfoil body having a radially outermost surface with respect to a turbine rotor; a bond coat on the radially outermost surface; and an outermost abrasive layer, the outermost abrasive layer being on the bond coat. The outermost abrasive layer may include a gradient oxide ceramic layer or a gradient cermet layer. In any case, the outermost abrasive layer is vacuum heat treated to harden the layer, resulting in increased friction and improved clearance between blade tips, resulting in smaller tip voids and lower leakage compared to conventional systems. The heat treated abrasive layer also resists oxidation at higher temperatures (e.g., greater than 1090 DEG C (about 2000 DEG F)) caused by increasingly using higher temperature fuels (such as hydrogen). Vacuum heat treatment also results in an improvement in thermal cycle testing.

The invention discloses a turbine blade thermal barrier coating thermal cycle test bed and a test method. The test bed comprises a heating system, a cooling system, a sample clamp, a monitoring system and a control system. The test method comprises the following steps: step 1, mounting and initializing a to-be-tested blade; 2, performing a thermal cycle main program, wherein the thermal cycle main program comprises a heating stage, a heat preservation stage and a cooling stage; 3, intelligent monitoring and feedback are carried out, and a monitoring system generates a heat-machine coupling field distribution diagram in real time; pre-judging a crack initiation position; the dynamic load spectrum adjusting unit reduces the temperature gradient or mechanical load of the high-crack-risk area in real time according to the prediction result; step 4, performing cycle termination and data analysis, and automatically generating a temperature-strain-crack evolution correlation map after a preset cycle number is completed; and starting the self-cleaning program of the test bench, and returning the induction coil and the nozzle array to a safety position. The problem that the temperature gradient is out of control in the thermal cycle test of the thermal barrier coating on the surface of the to-be-tested blade of the complex curved surface turbine is solved.

The application provides a packaging method of an enhanced gallium nitride power semiconductor device, and belongs to the technical field of chip manufacturing. The application firstly optimizes the electrode spacing and dielectric layer parameters through three-dimensional electric field distribution simulation, then realizes efficient thermal connection of the chip and the heat dissipation substrate by using a silver sintering process, and designs a multilayer field plate structure to disperse the high electric field area. Then, a high dielectric constant resin layer and a low ion content epoxy molding compound are applied for insulation and packaging, and a siloxane modified polyimide protective layer is coated. The reliability is verified through electric field resistance tests, high acceleration life tests and thermal cycle tests, the micro-nano channel structure is formed by using a focused ion beam technology to relieve the local high electric field area, and finally, the performance and life of the device are evaluated based on an electric field distribution and reliability prediction model of a deep learning framework, so that the reliability problem of the gallium nitride power semiconductor device in a high voltage working environment is solved.

To provide a block polymer for obtaining a photosensitive resin composition that has excellent dielectric properties and resolution, and further excellent crack resistance after heat cycle testing, and a photosensitive resin composition containing the block polymer. [Solution] A block polymer comprising a polyimide block derived from a dimer structure having a specific structure, and a polyamic acid block or polyimide block having a specific structure, and characterized by having residues derived from dimer amine and / or dimer isocyanate.

The embodiment of the present application discloses a kind of methods for quickly selecting temperature rise test current, it is related to the field of power fitting temperature rise and thermal cycle test.The method obtains the test steady-state temperature rise value of reference conductor when reaching test time according to the relationship between the steady-state temperature rise value of reference conductor and the temperature rise value and time of reference conductor and test temperature rise value.According to the relationship between steady-state temperature rise value and the current value of current in power loop, the relationship between test current value, test steady-state temperature rise value, target steady-state temperature rise value of reference conductor and target current value of current in power loop when reaching target steady-state temperature rise value is obtained, and target current value is obtained.This avoids the process of continuously groping target current value by test personnel, and target current value can be obtained by the method of the present application through current with test current value and test time, which saves test time and improves test efficiency.Meanwhile, the test current value will not cause irreversible damage to power loop.

The present application relates to the field of thermal insulation coatings, and discloses a kind of building thermal insulation coatings and preparation method thereof.The coating of the present application includes water-based acrylic emulsion, hollow ceramic microbeads, nano-silica, hydrophobic silane-based adjuvant;The water-based acrylic emulsion includes isooctyl acrylate, isobornyl methacrylate, hydroxypropyl acrylate, polyethylene glycol methyl ether acrylate, glycidyl methacrylate.The heat insulation temperature difference of the coating of the present application is as high as 26.8 DEG C, and the thermal conductivity coefficient is only 0.069 W / (m·K).In the wet cold thermal cycle test, the present application does not appear blistering, peeling and cracking phenomenon after 20 cycles.

The present application relates to the field of cold screen testing, and particularly relates to a device and method for cold screen sector cold-heat cycle testing. The device comprises a low-temperature nitrogen source, a normal-temperature nitrogen source, a mixing cavity, a metal cavity, a tail gas collection cavity and a control unit. The outlet of the low-temperature nitrogen source is provided with a low-temperature nitrogen valve, and the outlet of the normal-temperature nitrogen source is provided with a normal-temperature nitrogen valve. The low-temperature nitrogen valve is arranged at the outlet of the low-temperature nitrogen source, the normal-temperature nitrogen valve is arranged at the outlet of the normal-temperature nitrogen source, the first inlet of the mixing cavity is communicated with the outlet of the low-temperature nitrogen source, and the second inlet of the mixing cavity is communicated with the outlet of the normal-temperature nitrogen source. The normal-temperature nitrogen and the low-temperature nitrogen are fully mixed in the mixing cavity before being contacted with the cold screen sector through the cooperation of the low-temperature nitrogen valve and the normal-temperature nitrogen valve. The cooling and heating speeds can be controlled according to different testing requirements, and the cooling and heating speeds are prevented from being too fast to cause cracks in the cold screen sector.

The invention relates to the technical field of main-grid-free photovoltaic modules, in particular to main-grid-free conductive fixing glue and a preparation method of the main-grid-free photovoltaic module, and the main-grid-free conductive fixing glue comprises the following components in percentage by weight: 21%-78% of fixing glue, 10%-40% of conductive powder and 10%-40% of low-temperature soldering tin particles; wherein the melting point of the low-temperature soldering tin particles is 90-145 DEG C, and all the components are mixed to form the main-grid-free conductive fixing glue. According to the main-grid-free photovoltaic module, the main-grid-free conductive fixing glue is used for connecting an interconnection strip and a photovoltaic battery piece. The invention has the following beneficial effects: 1, good conductivity between the laminated interconnection strip and the battery grid line can be ensured without using a skin film, and the production cost is reduced; and 2, after a subsequent thermal cycle test of the assembly, pseudo soldering is not generated, no black spot exists in an EL image, and the power attenuation of the assembly is reduced.

The invention provides a thermal cycle test device and test method for an insulation board, and relates to the technical field of material test.The thermal cycle test device for the insulation board comprises a cabinet body with a test cavity and a clamp installed in the test cavity, and the clamp is used for clamping a sample and dividing the test cavity into a first cavity and a second cavity; a temperature control unit and a pressure control unit are arranged in the cabinet body, the temperature control unit firstly enables the temperature of the first chamber to be lower than the temperature of the second chamber so as to simulate a low-temperature environment in the B-type cabin in the first chamber, and then the pressure control unit enables the air pressure of the first chamber to be higher than the air pressure of the second chamber so as to simulate deformation of a sample under hydrostatic pressure in real service; meanwhile, the temperature in the first chamber and the temperature in the second chamber are detected through the first detection piece, so that the heat insulation efficiency of the insulation board under hydrostatic pressure in real service is simulated and calculated, and the authenticity of a test result is improved.

The invention provides a high-heat-consumption spacecraft normal-pressure thermal cycle test device and method. The device comprises a normal-pressure thermal cycle test box, a fluid loop system, an external heat flow simulation device and a high-power wave-absorbing pyramid, the normal-pressure thermal cycle test box is used for accommodating a high-heat-consumption spacecraft, an external heat flow simulation device and a high-power wave-absorbing pyramid; the fluid loop system is connected with the exteriors of the high-heat-consumption spacecraft and the normal-pressure thermal cycle test box, and the high-heat-consumption spacecraft is cooled through circularly flowing cooling liquid; the external heat flow simulation device is arranged opposite to the high-heat-consumption spacecraft and is used for controlling the temperature of the high-heat-consumption spacecraft; and the high-power wave-absorbing pyramid is arranged opposite to an antenna array surface of the high-heat-consumption spacecraft and is used for absorbing microwaves emitted by the antenna array surface. A thermal vacuum test is replaced by a normal-pressure thermal cycle test, so that the equivalence of test conditions is ensured, the test period is shortened, the test process is simplified, the thermal environment test efficiency of batch production of high-heat-consumption spacecrafts is improved, and the investment and operation cost of test equipment are reduced.

The application provides an assembly process of a spacecraft, and belongs to the technical field of spacecraft production and assembly. The application solves the technical problem of low efficiency of the existing assembly process of the spacecraft. The assembly process of the spacecraft comprises the following steps: cabin plate subassembly: installing and fixing functional elements on corresponding +Z cabin plates, -Z cabin plates, +X partition plates, -X partition plates, +X cabin plates, -X cabin plates, +Y cabin plates and -Y cabin plates; pre-test assembly: sequentially combining the -Z cabin plates, the +X partition plates, the -X partition plates, the +Z cabin plates, the +X cabin plates and the -X cabin plates and forming assembly through connecting pieces; normal-pressure thermal cycle test: exposing the spacecraft after the pre-test assembly to a preset high-low temperature alternating test environment for test under normal-pressure conditions; cabin sealing and assembly: assembling the +Y cabin plates and the -Y cabin plates to the spacecraft after the normal-pressure thermal cycle test through connecting pieces. The assembly process of the spacecraft can improve the efficiency while ensuring the assembly quality of the spacecraft.

In a holding device for holding an object, the flatness of the surface on which the object is placed is improved. We provide technology to enable this. [Solution] The holding device has a first surface on which the object is placed and a second surface which is the back surface of the first surface. A plate-shaped plate-like portion having a thermal expansion coefficient different from that of the material mainly forming the plate-like portion. It consists of a plate-shaped base portion, which is arranged on the second surface side of the plate-shaped portion, and the plate-shaped portion and the base portion. It comprises a joint portion that is positioned between the plate-shaped portion and the base portion and joins the plate-shaped portion, and the first The surface flatness is 40 μm or less, and the bonding occurs after a thermal cycling test at -70°C to 80°C. There is no peeling on the outer perimeter of the part.

The invention provides a thermodynamic cycle test starting protection device and method, and relates to the technical field of nuclear reactors. The dynamic pressure of the turbine blade runner and the axial force of the turbine are monitored, under the condition that the dynamic pressure and / or the axial force meet the preset conditions, the high-pressure helium is injected into the blade runner, the rotating speed of the starting all-in-one machine is increased, intervention is conducted on the pump effect under the turbine small flow condition in the starting test process of the test nuclear power unit, and the test efficiency is improved. Safety protection in the starting process of the unit is achieved, and the safety of the unit in the test process is improved.

The application provides a thermal shock and thermal shock combined test device for engine hot end components, and belongs to the technical field of engine hot end component tests, and specifically comprises a test table, a cooling liquid tank installed on the test table top, an opening at the top of the cooling liquid tank, a quartz lamp installed above the cooling liquid through a support frame, a test piece supporting mechanism installed between the quartz lamp and the bottom of the cooling liquid tank through a lifting mechanism, a lifting mechanism installed on the test table, an output end of the lifting mechanism connected to the test piece supporting mechanism, the lifting mechanism driving the test piece supporting mechanism to lower into the cooling liquid tank or to rise out of the cooling liquid tank, an air cooling mechanism installed on the test table top, an air outlet of the air cooling mechanism facing the test piece on the test piece supporting mechanism, and a temperature measuring mechanism installed on the test table and used for measuring the temperature of the test piece on the test piece supporting mechanism. Through the processing scheme, the test rigor and test efficiency are improved.