1661 results about "Aging test" patented technology

The invention provides an integrated testing device used in local discharge detection for oil immersion power transformer paper oil insulation electric heating ageing study, comprising an electric heating ageing oven, a test object electrode system and a high-voltage alternating current power supply system. The test object electrode system is arranged in the electric heating ageing oven and connected with the high-voltage alternating current power supply system. The testing device also comprises a local discharge signal acquisition system which comprises a local discharge signal transducer, a signal transmission cable and a data acquisition processing device. The input end of the signal transducer is connected with the test object electrode system, the output end is connected with the data acquisition processing device through the signal transmission cable; the testing device can acquire the local discharge parameter in the electric heating ageing process of paper oil insulation, provides data for the electric heating ageing study and can further realize the on-line monitoring of transformer paper oil insulation electric heating ageing state on the basis of the study.

The invention discloses an insulating cable residual service life comprehensive evaluation method based on physical, chemical and electric properties. An insulating cable is an XLPE (Cross Linked Polyethylene) insulating cable. The method comprises a partial discharging amount test, a gradual layer voltage-resisting test, a thermal aging test and an activating energy test; an insulating state of an XLPE insulating cable sample is obtained according to a partial discharging amount calculated by he partial discharging amount test; a residual service life numerical value range of the XLPE insulating cable sample is obtained according to testing results of the gradual layer voltage-resisting test, the thermal aging test and the activating energy test. The method can integrate a plurality of indexes of cable aging evaluation, and combines macroscopic and microscopic change conditions, so that the residual service life data of the cable is completely analyzed in the three aspects of physical performances, chemical performances and electric performances, and the method has important guiding meanings on line modification and power grid planning.

The invention relates to a transformer oil-paper insulation electricity-heating unite ageing test device which comprises a sealing cavity and a test device body located in the sealing cavity. The test device body of the transformer oil-paper insulation electricity-heating unite ageing test device comprises a high voltage electrode, a low voltage electrode and an insulation paper sample, the insulation paper sample of the test device body is located between the high voltage electrode and the low voltage electrode, and electric ageing conditions of an oil-paper insulation test are controlled by controlling the voltage exerted to the insulation paper sample; the transformer oil-paper insulation electricity-heating unite ageing test device further comprises a heating device, and heat aging conditions of the oil-paper insulation test are controlled by controlling the heating temperature of the heating device; the transformer oil-paper insulation electricity-heating unite ageing test device further comprises a partial discharge detecting device, and high-frequency partial discharge detecting and low-frequency partial discharge detecting are achieved. By means of the transformer oil-paper insulation electricity-heating unite ageing test device, multi-state detection and fault diagnosis of a transformer can be achieved, an oil sample and gas in the sealing cavity after the aging test are directly taken out under the condition that the sealing cavity is not opened, the reliability of experimental analysis results is high, and the device is easy and convenient to operate, and the problem that an existing test device is low in reliability of the experimental analysis results and inconvenient to operate is solved.

The invention discloses an electrical-thermal aging test device of cable accessories under high voltage and high current. The electrical-thermal aging test device is characterized by comprising the following four functional parts: a high-voltage generation unit (1), a test loop unit (2), a high-current generation unit (3) and a signal measurement unit (4). The high-voltage generation unit (1) is connected with the test loop unit (2) so as to introduce the high voltage to a test loop; the test loop unit (2) passes through the high-current generation unit (3) to form a magnetic field couple and generate the high current, and when the aging test is performed, the high-voltage generation unit and the high-current generation unit work at the same time to realize the purpose of applying the high voltage and the high current in the test loop unit; and the signal measurement unit (4) is installed in the test loop unit (2), so that the isolation aging state detection of the cable accessories can be realized through collecting the electrical characteristic parameters which are used for detecting the partial discharge of the sample cable accessories.

The invention discloses a conductive silver paste for microelectronic packaging, which contains the following components in parts by mass: 10-12 parts of liquid epoxy resins, 9-10 parts of diluents, 10-13 parts of spherical silver powder, 50-57 parts of platy silver powder, 0.5-1.5 parts of latent curing agents, 0.2-0.8 part of curing promoter, 1-2 parts of coupling agents, 0.5-1 part of conductive promoters, 0.5-1 part of aging resister and 1.5-2.3 parts of toughening agents. The body resistivity of the conductive silver paste prepared by the invention reaches 10-5 omega.cm, the shear strength is greater than 9MPa, and the conductive silver paste has stable contact resistance; and after low-temperature circulation, high-temperature humidity aging tests and other aging tests, the shear strength, the impact-resistant toughness and the contact resistance change are all less than 18%. The prepared conductive silver paste is suitable for microelectronic packaging and has the advantages of stable contact resistance and strong impact resistance.

The invention discloses a high temperature resistant flexible low-smoke zero-halogen flame-retardant polyolefin compound. The material formula thereof consists of the following materials: an ethylene-vinyl acetate copolymer, a propylene-ethylene copolymer, an interfacial compatilizer, a flame retardant, an antioxidant silane coupling agent and a lubricant, wherein, the Shore A hardness of the ethylene-vinyl acetate copolymer is less than 75, the weight content of the vinyl acetate in the raw material monomer is 30 percent to 70 percent, the Shore A hardness of the propylene-ethylene copolymer is less than 90, and the Shore A hardness of the interfacial compatilizer is less than 80. The invention can meet the high temperature resistant conditions of an aging test (135 DEG C 168h), and has the advantage of low cost.

The embodiment of the invention discloses a total power aging test circuit for a current transformer or a frequency transformer. The total power aging test circuit comprises a filter reactor, a boosting transformer and a direct-current power supply, wherein the direct-current power supply is communicated with two ends of a bus capacitor; the input end of the boosting transformer is communicated with the output end of a three-phase inverter through the filter reactor, and the output end of the boosting transformer is communicated with the input end of the three-phase inverter. The total power aging test circuit also comprises an aging test module arranged in a controller and an aging test triggering unit arranged on human interface device. The aging test triggering unit is used for controlling the running state of the aging test module, and the aging test module is used for controlling the current transformer or the frequency transformer for an aging test. The total power aging test circuit can effectively reduce the energy consumption in the aging test process, simplifies the structure of a test system, and reduces the maintenance cost of the system.

A gate-on voltage / LED driving voltage generator includes an inductor boosting an input voltage through a PWM voltage and the input voltage, a diode and capacitor rectifying the boosted voltage, a first output terminal outputting the rectified voltage to supply an LED driving voltage to an LED, and a second output terminal supplying the rectified voltage to a gate driving circuit. Further, an aging test apparatus of an LCD device, which includes a high LED driving voltage generator in an HVS power board, and an HVI power board, may selectively perform an aging test according to a backlight unit of the LCD. Further, a DC-DC converter having the gate-on voltage / LED driving voltage generator, and the LCD including the DC-DC converter are provided.

This invention is an ageing testing system, which is electrically connected with plane display panel and is used for ageing testing plane display panel. The system at least comprises a signal generator used to generate a power signal and first control signal; at least one signal adjusting circuit which is electrically connected with signal generator to turn first control signal into second control signal for outputting according to a testing condition; at least one boosted circuit which is electrically connected with signal adjusting circuit and used to boost power signal and second control signal level and driving ability and then by boosting voltage to realize the power signal driven plane display panel and second control signal and take ageing testing of plane display panel.

The invention relates to an aging test method and an aging test device under the multi-field coupling of humidity, heat and force. The method is used for testing polymer materials and test specimens produced by composite materials of the polymer materials, and the test is based on the dynamic monitoring to the tensile creep compliance of the materials under the multi-field coupling of the humidity, the heat and the force. The device is based on a standard humid and hot environmental box controlled by a microcomputer, a test specimen clamping and loading mechanism is arranged in a box of the device, and an electronic extensometer and a laser extensometer are arranged to form a double displacement sensor and are connected to the microcomputer through an acquisition device after the data acquisition. The method and the device have the advantages of accurate and convenient test and low cost, and are suitable for the research of viscous-elastic mechanical properties and aging performances under the operation of polymers and composite materials of the polymers.

The invention discloses silver paste used for a grapheme touch screen, and a preparation method thereof. The silver paste is prepared from flake-like silver powder, spherical silver powder, inorganic electric conduction additive, organic carrier, accessory ingredient and diluent of residual percentage by weight. The preparation method comprises the following steps of: firstly, preparing the organic carrier; adding the flake-like silver powder, the spherical silver powder, the inorganic electric conduction additive, the accessory ingredient and the diluent into the organic carrier; fully and evenly mixing; finally, grinding by a three-roller machine, and carrying out vacuum defoaming. The silver paste disclosed by the invention has the advantages of good overall performance, convenience in printing, good adhesion property, good bending resistance, good weather resistance, good stability and good electrical conductivity and insulating oil performance and can pass a long-time high-temperature high-moisture aging test and thermal shock tests for more than hundred times, and the requirement on the conductive silver paste by the grapheme touch screen can be satisfied.

The invention provides a device and a method for testing normal-temperature and high-temperature compression stress relaxation of rubber. The device mainly comprises an upper plate, a lower plate, a limiter, a pressure sensor, a pressure head and a flange. The upper plate is fixed to the lower plate through the limiter. The pressure sensor is fixed at a center position of the upper plate and is located between the upper plate and the lower plate. The pressure head is fixed at another end of the pressure sensor. A rubber sample is fixed at a center position of the lower plate by the flange and contacts with the pressure head. The method comprises the following steps of preparing an appropriate rubber sample, assembling the device, fixing exactly the appropriate rubber sample at the center of the lower plate, contacting the appropriate rubber sample with the pressure head, removing the flange, putting the device into an aging test box for an experiment, and after the experiment is finished, determining compression stress relaxation coefficients of the appropriate rubber sample. Through the device and the method, normal-temperature and high-temperature compression stress relaxation tests are realized; real-time monitoring of compression stress variation is realized; and the accuracy, the repeatability and the reproducibility of a life prediction result are guaranteed.

The invention discloses an ageing test system, which comprises an ageing test box, a test module, a data processing module and a system control module, wherein the test module is used for testing function and / or direct current and / or alternating current parameters of components to be subjected to an ageing test; the data processing module is used for processing test data obtained by the test module; the system control module is used for sending out various control signals to control completion of the ageing test; and the ageing test box is internally provided with at least one adaptive plate for placing the components to be subjected to the ageing test, and the at least one adaptive plate, the test module, the data processing module and the system control module are connected via interfaces. The ageing test system in the invention solves the problem of the inaccurate screening result of a semiconductor component due to the limited test functions in the existing ageing test system.

The invention provides an electronic load module of a power supply aging test and a power supply aging test system. The electronic load module of the power supply aging test provides an intelligent electronic load module controlled by an MCU (Microprogrammed Control Unit). According to the power supply aging test system, a plurality of electronic load modules of the power supply aging test are uniformly managed, displayed and stored by adopting an upper computer, so that the system is the intelligent power supply aging test system.

The invention provides a novel anti-skidding coating for a deck, which is composed of the following components in parts by weight: 30-45 parts of latex, 2-5 parts of film forming accessory ingredient, 15-25 parts of titanium pigment, 5-20 parts of filler, 0.2-1.0 part of wetting dispersant, 5-15 parts of anti-skidding agent, 0.1-0.5 part of de-foaming agent, 0.5-1.0 part of age inhibitor, 0.5-2.0 parts of thickening agent, 0.5-1.0 part of anti-mildew corrosion-protection agent, and 10-25 parts of water. The coating of the invention has very high wearing resistance and anti-skidding degree; the formed coat has good adhesive ability, wearing resistance, weather resistance, light-proof aging resistance, seawater resistance and salt mist resistance, wherein the artificial weathering aging test (ultraviolet UVB-313 resistance) is 4000 h, and the wearing resistance (1000g / 1000r) is not more than 30mg; the coating is applied to the corrosion prevention of the decks and the iron surfaces of the sea apparatus of boats and ocean platforms, wherein the decks and the iron surfaces require to have weather resistance, anti-skidding property, wearing resistance, and seawater corrosion resistance. The preparation method of the anti-skidding coating for the deck is simple in technology, low in cost and is performed without special apparatus.

The invention discloses a fault on-line repairing method for satellite power supply and distribution test system, which can fast repair the fault of power supply and distribution test equipments on line in thermal tests, aging tests and other tests in which the satellite needs continuous powering up. The internal components of the power supply and distribution test equipments are encapsulated in the plug-in or guide-way form, and simultaneously modular structure designing method is adopted to lead a magnetic latching relay can be fast replaced when in fault; the digital quantity output and input adopt dual redundant configuration, and the analog quantity output signals are displayed by a measurement display unit; the solar cell array simulator output is directly loaded on the satellite via independent interface; a flow backward resisting diode is connected in series between a voltage stabilization source power supply positive line, and an analog quantity outgoing line is connected with a protective resistor in series to prevent the on-satellite products from being influenced by cable plugging when the satellite is powered up; on the basis of satellite-ground synergic design, the redundant resources can be started by fast replacing the faulted modules one faults occur to the equipments to realize equipment on-line repairing.

The invention provides a transformer oil-paper insulation frequency domain dielectric loss integral reduction method under different temperature. An oil-paper insulation moisture and aging test product is prepared, and the characteristic quantity-frequency domain dielectric loss integral of the dielectric loss cumulative value of a certain frequency domain section of the oil-paper insulation test product under five different temperature is measured by using an insulation diagnostic instrument IDAX-300; the maximum value of the dielectric loss integral area of the oil-paper insulation moisture and aging test product at the 0.1-10Hz frequency band is acquired, and the maximum value of the dielectric loss integral area acts as a characteristic parameter; and fitting of the measurement temperature and the maximum value of the frequency domain dielectric loss integral area is performed through the least square method so that an expression of the frequency domain dielectric loss integral and aging and wetting under different temperature is acquired. Conversion of the frequency domain dielectric loss integral characteristic quantity under different temperature can be effectively performed so that accurate analysis of the test result of the transformer oil-paper insulation system frequency domain dielectric loss integral under different environmental temperature can be realized, and the influence of the measurement temperature on the transformer insulation state assessment through the frequency domain dielectric loss integral characteristic quantity can be eliminated.

The invention discloses a predicting method of large-size NEPE propellant loading storage life, which includes following steps: (1) performing constant-stress load single-temperature acceleration test, which includes operations of making an NEPE propellant acceleration aging test sample under constant-stress load and performing a single-temperature-stress level temperature acceleration life test; (2) researching the performance change law during an NEPE propellant loading aging process; (3) determining a failure model of the NEPE propellant loading; and (4) carrying out acceleration life tests at different temperatures and under different pressures to predict the large-size NEPE propellant loading storage life. In the method, by means of loading pressure to simulate the self weight on a large-size NEPE propellant during storage, the performance change law of the NEPE propellant under a temperature-pressure double-stress effect. In addition, with tensile strength as a failure parameter, the method of evaluating the NEPE propellant loading storage life is disclosed.

The present invention provides an aging test device of an arrester. The aging test device of the arrester comprises a pedestal, and the pedestal is provided with a rail; the rail is provided with a placement table, power-on detection devices are arranged at two ends of the placement table, and the power-on detection devices, driven by clamping cylinders arranged at the back side of the power-on detection devices, are subjected to clamp; a temperature detection device is arranged above the rail, a lifting cylinder is disposed at the upper end of the temperature detection device, and the lifting cylinder drives the temperature detection device to close the arrester after the power-on detection devices are electrified for a while. An arrester is disposed on a placement table on a rail, power-on detection devices are configured to perform aging detection of the arrester, and a temperature detection device is configured to perform heat degree detection of the arrester after power on, so that the detection efficiency is improved; and the arrester is only needed to be disposed on the placement table to perform aging detection, so that the labor is saved and the work efficiency is improved.

The invention provides a test device and a test method for testing building structural adhesive bonding tensile stress relaxation. The test device comprises a fixed support, a tensioning device, a test piece, a fixture and a digital dynamometer, wherein the test piece is detachably mounted on the fixture and receives the tensile force from tensioning device through the fixture. The test method comprises the steps as follows: the cured test piece is assembled on the test device; a turnbuckle of the tensioning device is rotated to adjust the force applied to the test piece; the test device is entirely placed on an outdoor natural exposure field or selectively placed in a manual ageing chamber, so that the tensile stress under the corresponding ageing condition can be measured; the tensile stress after ageing is compared with the tensile stress before ageing, so that the tensile stress relaxation coefficient can be obtained. By the aid of the test device and the test method, building structural adhesive bonding tensile stress relaxation after various ageing tests can be tested, changes of the tensile stress can be monitored in real time, and a means is provided for evaluation of the bonding ageing durability and prediction of the service life of a building structural adhesive.

An embodiment of the invention provides a device for wire comprehensive factor aging test. The device comprises the following parts: an aging test box for mandrels of carbon fiber composite core wire specimens with different types, wires and different test conditions, and the different test requirements are realized by changing many actors as follows: solar radiation simulation intensity, artificial rainfall level, dry degree, high humidity state, salt spray concentration and period of hot and cold recycling; a horizontal tensile machine for passing through the aging test box to strain the carbon fiber composite core wire specimens, in order to meet tension conditions of carbon fiber composite core wire specimens in the aging test box; and transformer equipment for connecting the carbon fiber composite core wire specimens through a high voltage bushing on the wall of the aging test box, in order to meet the high voltage condition for carbon fiber composite core wire specimens. The embodiment of the invention provides an aging test device suitable for a testing scheme of comprehensive factor aging performance for carbon fiber composite core wire.

The invention belongs to the technical field of semiconductor memory aging test, A semiconductor memory aging test core board is disclosed, According to the parameter configuration of the host computer, the test vectors are generated in real time, various types of test signals and test patterns are output, and the test signals are delayed and adjusted, the driving is strengthened, the waveform control is processed, and the power signals are compensated to generate more accurate power signals of the test signals. Users' customization ability and flexibility to test waveforms are improved. The test core board has a partitioned memory, which stores the real-time comparison test data in the test process, and controls and analyzes the failure DUT test process through the partitioned stored data, thus realizing the control and failure analysis of a single DUT test process in the aging test. The storage space provided by the memory such as DRAM stores each IO of each DUT long enough to enablethe DUT manufacturer to perform statistical analysis on each batch of failed DUT, thereby improving yield and improving product reliability.

The invention discloses electric insulation electric-heating aging test equipment, which comprises non-vignetting high-voltage testing transformer and at least one test box, wherein the box body of the test box is adiabatic; the inside of the test box is provided with a heating device; the top of the test box is provided with at least one high-voltage electrode connected with the high-voltage output end of the non-vignetting high-voltage testing transformer, while the lower part is provided with at least one detection terminal; and the high-voltage electrode and the detection terminal are respectively insulated from the box body of the test box. The electric insulation electric-heating aging test equipment can effectively simulate the electrical and thermal stress on electric equipment during operation, and carries out experiment on a plurality of test samples under different temperatures, voltage types and voltage grades; moreover, the test equipment obtains the data of current waveform and local discharging signal during the aging process of test samples.

The invention discloses an integrated environment test device, which comprises an industrial personal computer, an aging test box, a water storage tank and a spraying water pump, wherein an xenon lamp and a shower nozzle are arranged inside the aging test box, the shower nozzle is connected with a water outlet of the spraying water pump, a water inlet of the spraying water pump is connected with the water storage tank, and a power input end of the xenon lamp and the power input end of the spraying water pump are respectively accessed to the industrial personal computer. Multiple test factors are integrated inside one aging test box to actually simulate the working situation of an electric power device under an all-day severe environment and an extreme climate environmental condition, and evidence can be provided for the design and manufacturing of different electric power devices and composite material insulation products in the power transmission and transformation industry through the test data, so that the safe running of an electric network can be guaranteed.

The invention relates to a life prediction method based on a lithium-ion battery aging model. The method comprises the steps that (1) the capacity retention ratio of a lithium battery in a 50% SOC state after storage suspension under different temperature and the value, which changes along with storage time, of direct-current internal resistance of the battery are tested; (2) the battery in different voltage states is stored for the same time under the same temperature, and alternating-current impedance testing and direct-current internal resistance testing are performed; (3) the correlation between calendar life capacity attenuation, alternating-current internal resistance changing and direct-current internal resistance changing and temperature and voltage is analyzed, and the changing process of experimental aging data over time is described through a fitting function; and (4) the model is analyzed according to fitted data, measured effective data is fitted, and battery calendar lifeand battery internal resistance parameters in the future are effectively predicted. Through the method, a truthful life state can be inferred from an accelerated aging test, the test method is simple, advanced equipment and complicated operation are not needed, and the test cycle is greatly shortened.

The invention discloses an oiled paper compound insulation electrical ageing test system which comprises an alternating current-direct current high voltage power supply, a high voltage capacitance-resistance divider, an oiled paper insulation sample tank, a partial discharge measuring instrument and an upper computer. The alternating current-direct current high voltage power supply is connected with the oiled paper insulation sample tank. The high voltage capacitance-resistance divider is connected with the oiled paper insulation sample tank. The partial discharge measuring instrument is connected with the oiled paper insulation sample tank, and collects partial discharge signals inside an oiled paper insulation sample. The upper computer is in two-way communication connection with the alternating current-direct current high voltage power supply and the partial discharge measuring instrument. According to the oiled paper compound insulation electrical ageing test system, alternating current-direct current compound voltage is adopted for oiled paper insulation, accurate and accelerated ageing is conducted on a solid insulation paper board, and an oiled paper insulation electrical ageing laboratory test is achieved.

The invention relates to the field of electronic test, in particular to a high-temperature aging test instrument and a constant-temperature control method thereof. In the embodiment of the invention, a temperature control module of the high-temperature aging test instrument controls the heating condition of a heater through judging whether the environment temperature of a metal box conforms to the target temperature or not, so the environment temperature of the metal box is synchronous with the target temperature, the temperature drift and the error are reduced, and in addition, the set temperature has a wide range and can be continuously regulated. In addition, the high-temperature aging test instrument is provided with a test electrification interface, so the high-temperature aging test instrument can collect and analyze the operation parameters of tested products at high temperature, and testers can more perfectly know the operation condition of the tested products in the high-temperature test.

The invention provides a method for predicting the rubber storage life on the basis of compression stress relaxation test equipment, which belongs to the technical field of rubber life prediction. Firstly, a test sample is prepared and debugged, the test equipment is installed, the test is prepared, and the ageing test is carried out, so different compression stress values are acquired; then the data is processed, MATLAB (Matrix Laboratory) software is utilized to plot the logarithm logt of ageing time through utilizing compression permanent deformation retention rate or stress relaxation retention rate, so scatter diagrams under different ageing temperatures are obtained, and the data in the diagrams is fitted by adopting the Boltzmann mathematical function; and finally, model parameters are determined, and the life is predicted. The method utilizes a pressure sensor and an external data display instrument to monitor the compression stress variation in real time, the sample does not needed to be taken out for the test and does not need to be replaced during the test process, so the temperature fluctuation is avoided, the data fluctuation factor is reduced, and the accuracy and repeatability of the life prediction result are ensured.

The invention relates to a material for a waste asphalt regeneration pavement and a preparation method of the material and belongs to the field of construction and maintenance of road engineering. For improving the property of waste asphalt and lowering the maintenance cost of the road, the invention provides a material for waste asphalt regeneration pavement and a preparation method of the material. The material for the waste asphalt regeneration pavement comprises lightweight oil, plasticized components, a modified main agent, tackifying components and a stabilizer, and the selection range and constitution of all components are specifically limited. Aging tests and low-temperature performance show that the viscoplastic performance of the regenerated asphalt and the anti-crack property and durability of the pavement can be greatly improved when the material for waste asphalt regeneration pavement is used for regeneration of the waste asphalt; therefore, the material for waste asphalt regeneration pavement has a bright application prospect.

The invention discloses a self-circulation aging test system and a test method for a frequency converter. The method comprises the following steps: constructing a test environment by an alternating-current power grid, a boosting transformer, a tested frequency converter, a grid-connected reactor and a grid-connected switch; controlling the alternating-current output end of the tested frequency converter to actively output a detection pulse train before grid-connected running through a grid-connected control module embedded into a tested frequency converter control circuit; identifying the phase sequence and phase of the current network voltage by detecting response current flowing through the grid-connected reactor; performing network voltage tracking and current vector control grid-connected output; feeding grid-connected output electric energy back to the rectification input end of the tested frequency converter through the boosting transformer; controlling the grid-connected output current amplitude to realize self-circulation full-power aging test of the frequency converter. By adopting the self-circulation aging test system and the test method, self-circulation full-power aging test of the frequency converter is realized under the hardware configuration condition of a general frequency converter product. The self-circulation aging test system and the test method have the advantages of easiness in configuration, convenience in operation, real simulation condition, energy saving and high aging efficiency.