1205 results about "Resistance test" patented technology

The invention relates to a planting method of Chinese trichosanthes, belonging to the technical field of plantation and comprising the steps of: variety breeding, seedling reproduction, transplanting, field management, disease and pest control, harvesting and processing, wherein the variety breeding step includes the sub-steps of the tests in different production places, amplification and verification tests, resistance test, field pest investigation and trichosanthes nematode control; the seedling reproduction step includes the sub-steps of seed reproduction and root reproduction; the transplanting step includes the sub-steps of land selection and preparation, ridging, reproduction and planting, planting method implementation and field management; the land selection and preparation step includes the sub-steps of detection on chemical characteristic of soil, basic fertilizer application and disinfection; the reproduction and planting step includes the sub-steps of seed bud selection, rood cutting and breeding, planting and shed putting up; the planting method implementation step includes the sub-steps of planning density control and staminiferous plant matching; the filed management step includes the sub-steps of intertillagement and weeding, top application, shed putting up, pruning and cold prevention, in particular to intertillagement and weeding, root airing, intercrop, earthing, vine supporting and racking, top application, pruning, flower and fruit protection, chemical control and foliage application; and the disease and pest control step includes the sub-steps of control of diseases and pest and control method implementation.

The present invention provides a cutter rock-breaking mechanism which is applied in the technical field of the cutter experiment and an abrasion resistant tester thereof. The abrasion resistant tester comprises a hydraulic cylinder, a structural frame, a bearing plate, a cutter support, a disc-shaped hob and a rotation worktable. When the cutter rock-breaking mechanism and the abrasion resistant tester work, the disc-shaped hob is connected with the cutter support through a bolt. The cutter support is jointed and fixed on the bearing plate through the bolts. The hydraulic cylinder exerts a certain load to impact the disc-shaped hob to the rock sample on the worktable and generate a certain penetration. Afterwards the worktable is rotated through a power system to execute cutting test to the rock passively. The cutter rock-breaking mechanism and the abrasion resistant tester execute cutting with a single cutter to do the abrasion resistance test of the cutter. The bearing plate is provided with a groove. The regulation to the cutter space and the phase angle is realized through the variation of the jointing position of the cutter support on the bearing plate. The regulation to the inner deflection angle of the cutter is realized by changing the cutter supports with different angles. The positioning and rotation of the rock are realized through the rotating worktable. The designing of the device is novel and scientific. The knife angle, phase angle and inner deflection angle which affect larger to the rock breaking and abrasion of cutter are researched. The device settles the problem that two hob cutters simultaneously cut the rock.

This invention relates to one friction loss process analogue and test device, which comprises rotation disc, rotation drive device, steel ball and pressure device and test sample resistance test circuit, wherein, the test resistance value test circuit is composed of power, resistance, sample and amplification circuit, photoelectrical isolation circuit, A/D conversion circuit and computer, wherein, the rotation drive device and rotation disc down end are connected; the steel ball top end is fixed on pressure device with one output end fixed on steel ball with other output end connected to rotation disc; two input ends of collection and amplification circuit are fixed on steel balls and rotation disc.

Disclosed is a halogen-free, flame retardant thermoplastic resin composition based on polypropylene and one or more thermoplastic elastomers with an organic nitrogen- and/or phosphorus-based intumescent flame retardant comprising a piperazine component. The composition is processed easily to make a wire and cable sheath exhibiting a balance of high flame retardancy, good flexibility, high wet electrical resistance and excellent heat deformation properties, and which passes the VW-I flame retardancy test, the UL1581 heat deformation test at 150° C. and the wet electrical resistance test, and also exhibits good tensile and flexibility properties. Also disclosed is a wire and cable sheath made from the composition.

The invention relates to the field of electrical equipment detection, in particular to a full-performance detecting system of a magnetic latching relay and a detecting method of the full-performance detecting system of the magnetic latching relay. The detecting system comprises a main control panel, an auxiliary control panel and a resistive load box, wherein the auxiliary control panel is communicated with the main control panel through a network port, the auxiliary control panel controls the resistive load box to work by controlling an air switch, and the main control panel is connected with the magnetic latching relay. An ongoing full-performance test of the magnetic latching relay comprises an initial operation voltage, a returned value voltage test, an operation time test, a four probe method and high current method coil resistance test, a contact temperature-rise test, a mechanical life test, an electrical endurance test and an overload test. The full-performance detecting system is simple in wiring, capable of automatically finishing an electrical performance test, a safety performance test and a service life test without manual intervention, comprehensive in test items, and simple in test process.

The invention discloses a method for producing a vehicle-used stabilizer bar with high corrosion resistance, which relates to the processing technology field of metal parts, in particular to a production process of an automotive stabilizer bar. The production process comprises the following steps: blanking, bending, forging, drilling and reaming, boring, quenching and tempering, correcting, rotoblasting, phosphating, surface plastic-spraying and finally pressing into a bushing. Through the process, the corrosion resistance of the surface of the stabilizer bar is effectively improved and the service life is also prolonged. After the corrosion resistance test of 150 hours is carried out according to the method in QC/T484-1999, the spread of unilateral corrosion along the cutting does not exceed 2 mm and the check result shows that the unilateral corrosion is 1.3 mm.

The invention belongs to the technical field of ship manufacturing, and specially relates to a method for a ship ice-breaking test in real water area. The method comprises the steps that (1), two water areas are formed in a planned test area on the river surface, wherein the length and the width of each water area are 50 m and 10 m correspondingly, and a laboratory containing test equipment and testers is built; (2), two cable towing mechanisms are fixed to one end of an ice tunnel correspondingly, a ship module is adjusted to a marked ballast waterline at the other end, and arrangement, connection and debugging of the test equipment are conducted; and (3), the cable towing mechanisms tow the ship module to move at a constant speed, and open-water resistance and the like of the ship module in still water are measured. The method is applied to resistance tests of the ship module in a level ice zone and a broken ice zone, a self-propulsion test of the ship module and the like, and can accurately measure parameters, such as total resistance, resistance components, sinkage, trim, propeller thrust and torque and main motor power, of the ship module when the ship module sails in the ice zones.

The invention discloses a detection device and a detection method for a station-dedicated DC power system insulation monitoring device. The detection device comprises a DC power unit, an auxiliary DC power unit, and an AC power unit, wherein the DC power unit comprises a first rectifying voltage-regulating module SDC1 and a DC busbar KM1; the auxiliary DC power unit comprises a second rectifying voltage-regulating module SDC2 and an auxiliary DC busbar KM2; the AC power unit comprises an AC voltage regulator T1 and a change-over switch S2; the detection device further comprises a ground insulation testing unit, and a waveform measuring and recording, AC jump and control protection circuit. The detection device has the benefits as follows: mutual jump alarm test, ring network alarm test, AC jump alarm test, balanced bridge AC superimposition resistance test, insulation resistance monitoring, grounding line selection correctness test and other function and performance detection or tests and verifications for the station-dedicated DC power system insulation monitoring device are realized, so as to prevent the improper DC power supply insulation monitoring device from influencing the safe production of a power system.

A secondary battery testing system comprises a single chip control module, a testing state control module, a data collecting module, a reference voltage module, a charging-discharging module, an inner resistance testing module and an environment temperature testing module. An outputting end of the single chip control module is connected to an inputting end of the testing state control module; the single chip control module is connected to the data collecting module in bidirectional way via data lines and connected to the environment temperature testing module in bidirectional way; outputting ends of the reference voltage module are respectively connected to the inputting end of the testing state control module and the inputting end of the data collecting module; the outputting ends of the testing state control module are respectively connected to the inputting end of the charging-discharging module and the inputting end of the inner resistance testing module; the outputting end of the charging-discharging module and the outputting end of the inner resistance testing module are respectively connected with the inputting end of the data collecting module. The invention can significantly enhance the detctjion accuracy and precision of the battery; the work is stable and reliable with inner resistance testing function, monitoring the inner resistance change of the secondary battery in the discharging process and providing the inner resistance parameter for the selection and match of the secondary battery.

The invention specifically relates to an antistatic abrasion-resistant UV coating and a preparation method thereof, and belongs to the field of materials. The antistatic abrasion-resistant UV coating comprises the following components in percentage by mass: 5 to 35 percent of multifunctional polyurethane acrylate, 15 to 45 percent of epoxy acrylate, 10 to 40 percent of reactive diluent, 2 to 12 percent of photoinitiator, 0.5 to 3 percent of other additives, 5 to 25 percent of conductive nano-attapulgite powder, and 0.05 to 0.5 percent of silane coupling agent. The coating of the invention has an appearance of white liquid or light yellow liquid; the surface resistance of a coat prepared by the coating of the invention is 4.8*10<6> to 6.5*10 <8> ohms; the 100-revolution weight loss in the Taber abrasion resistance test is 0.0045 to 0.0075 gram; and the surface hardness is more than or equal to 3 H; and the coating does not change after dipping in 5 percent sodium hydroxide for 24 hours. The antistatic abrasion-resistant UV coating of the invention has the advantages of simple preparation, low cost, convenient use, good effect and wide application prospect.

The invention belongs to the technical field of aero-turbine engines, particularly relates to an air inlet flow field distortion simulation device used for aero-turbine engine tests, and particularly relates to an adjustable fan-shaped plate flow field distortion simulator. The distortion simulator is applied to an engine air inlet distortion resistance test and an engine surge test. Compared with the exiting distortion simulator, the device has the following advantages that the adjustable distortion simulator adopts the adjustable fan-shaped plate mode according to the use requirements of a turbofan engine, and the angle of the fan-shaped plate is adjustable. The structural form is domestically used for the first time; the state of distortion simulation is changed through mechanical transmission, and the structural form and the sealing performance of the device are better than those of other forms of adjustable simulators; and the test efficiency is high, and multiple engine air inlet distribution state tests can be completed in one test so that the test cost can be effectively reduced.

The invention provides a resistance testing device for a cable-towed ship model. The resistance testing device comprises a power part, a towing cable, a fixing part and a measuring and controlling part, wherein the power part comprises a support frame arranged on a dock pond wall, a motor, a rotating speed and torque measuring instrument and a driving wheel; the motor is connected with the rotating speed and torque measuring instrument through a primary shaft coupling; the rotating speed and torque measuring instrument is connected with the driving wheel through a secondary shaft coupling; the fixing part comprises a fixing frame and a driven wheel arranged on the fixing frame; the fixing frame is arranged on an end wall of a tow truck; the towing cable is wound on the driving wheel and the driven wheel respectively, so that towing of the ship model is realized; and the measuring and controlling part comprises a motor controller which is connected with the motor, a data acquisition unit which is connected with the rotating speed and torque measuring instrument, and a control computer. The resistance testing device has the characteristics of convenience in using and operating, easiness in producing, disassembling, assembling and maintaining, and the like, is suitable for ship model towing water ponds and various towing water grooves, and can be applied to ship model resistance testing of general engineering properties and ship resistance teaching experiments.

The invention relates to a prawn low dissolved oxygen resistance family selection method, and belongs to the technical field of prawn stress-resistance trait selection. The method comprises the steps of base population establishing; F1 generation family establishing; same pool culturing; low dissolved oxygen resistance testing; F2 generation family establishing; continuous generation selecting, wherein different sources of parent prawns are selected to establish a full/half-slib family through directional mating, common environmental breeding is performed, 94 h low dissolved oxygen stress is performed, parent selecting and remaining are performed according to the low dissolved oxygen resistance test result and the growth measure result, after four generations of continuous selection, the family of distant genetic relationship is selected from the families with excellent growth performance and strong low dissolved oxygen resistance performance, the male and female prawns which are big in individual, strong in vigor and normal in gonad development are selected to serve as parent to breed as good varieties. According to the method, the problem occurring in prawn high-density culturing that the prawns are dead caused by the fact that the prawn growth is influenced by low dissolved oxygen is solved, and the development of the prawn high-density culture industry is greatly promoted.

The present invention is detection equipment based on electric leakage imprinting resistance and electric corrosion wear resistance of electric insulating material, and is suitable for the electric leakage imprinting resistance test of electric insulating material. The detection equipment includes test transformer inside a casing, stepped motor on the fixing rack, driving gear on the shaft of the stepped motor and meshed driven gear, lead screw mounted to the driven gear and connected liquid pushing board and liquid pushing unit, limiting resistor, and tested sampler holder in the position corresponding to the liquid pushing unit. The limiting resistor is connected to the test transformer and the upper electrode on the tested sample holder, and the lower electrode of the tested sampler holder is grounded. During operation, the motor rotates the driving gear and the driven gear and pushes the liquid pushing board to move downwards for dropping the corrosive liquid to the tested sample.

The invention discloses a pile side negative friction resistance test device in frozen earth areas and an application method thereof. The device consists of a top cover, a top plate, a gauge stand, a dial indicator, a screw, a hollow pile, a settlement pole, a moisture transducer, a double-layer steel drum, a foil gauge A, a foil gauge B, a soil sample, inorganic thermal mortar, a bottom plate, medium sand, a moisturizing device, a pool, a refrigerator, a refrigerating tube, a frost heave thaw collapse meter and a temperature sensor. According to the device, the refrigerator is used for manpower refrigeration, the atmospheric temperature under various working conditions can be simulated, and the temperature and frost heave quantity of the soil sample can be accurately measured in real time by using the temperature sensor and the frost heave thaw collapse meter, so that the influence on the negative friction resistance by the frost heave quantity is avoided, and the test result is more precise.

The invention relates to an automatic detection device for a commutator. The automatic detection device for the commutator comprises a machine table, a rotating table, an inter-sheet high voltage test and high voltage resistance test device, a stop-pass gauge test device, a commutator brass hook and a groove alignment detection device, the rotating table, the inter-sheet high voltage test and high voltage resistance test device, the stop-pass gauge test device, the commutator brass hook and the groove alignment detection device are arranged on the machine table in sequence, a linear feeder is arranged on the discharging port of the rotating disc, a first mechanical arm is arranged at the discharging end of the linear feeder and is opposite to the inter-sheet high voltage test and high voltage resistance test device, a high voltage testing instrument is arranged above the inter-sheet high voltage test and high voltage resistance test device, a conveying belt is connected beside the inter-sheet high voltage test and high voltage resistance test device, a second mechanical arm is arranged at the discharging end of the conveying belt, the second mechanical arm is opposite to the stop-pass gauge test device, the commutator brass hook and the groove alignment detection device, and a third mechanical arm is arranged beside the commutator brass hook and the groove alignment detection device. Multiple detection processes are achieved on one production line, detection is fully automatic in the whole process, the labor intensity of workers is greatly lowered, cost is lowered, and product quality is stable.

The invention discloses a device for test abrasion resistance, used to test the object with irregular surface. The invention comprises a test head, a movable unit and a fixed platform, wherein an object is arranged on the fixed platform, the test head controlled by the movable unit reciprocally moves on the object, the test head is made from rigid and brittle material, the end of the test head is flat, test head has better contact with the surface of the object in the reciprocal movement. The invention also provides a relative abrasion-resistance test method. When in use and in friction, since the end of the pencil is flat and the pencil is rigid, the invention can accurately pickup test point, to contact the test point accurately, therefore, the test pressure is accurate, and the test result can represent whole effect, to accurately evaluate the plated structure art of lathe tool, and the abrasion resistance of structure of other lathe tool.

The invention relates to the technical field of lamp test devices, in particular to a lamp aging test line. The lamp aging test line comprises a machine frame, wherein conveying rails, a drive motor and a transmission mechanism are arranged on the machine frame. A tool plate is arranged on the conveying rails, sockets are arranged on the tool plate, and electric conduction strips are arranged on the lower end face of the tool plate. A first aging test area, a vibration test area and a second aging test area are sequentially arranged on the machine frame. Each aging test area comprises multiple wire collection rail assemblies. Each wire collection rail assembly comprises three electric conduction grooves and multiple sets of electric conduction wheel devices. The electric conduction wheel devices make contact with and are connected with the electric conduction strips of the tool plate passing through the portion above the electric conduction strips respectively. The tool plate is conveyed through the conveying rails and can be automatically connected with the wire collection rail assemblies in the different test areas when passing through the different test areas so that corresponding voltages can have access to the tool plate, the high voltage test, the low voltage test, the voltage prevention test, the vibration resistance test and the like can be automatically conducted on a lamp, no manual operation is required in the test process, the test efficiency is high, and the operation is safe and reliable.

In at least one embodiment of the present invention, a material intended for personal protective equipment is disclosed, wherein the material includes at least four different layers, the layers being: an outer first layer of a material comprising at least one polymer, which material is self-extinguishing; a second layer of a fiber material, which fiber material is self-extinguishing; a third layer being adhesive; and an inner fourth layer being a barrier laminate; wherein all at least four different layers individually are attached to layers located next to them. Furthermore, a protective suit including a material according to the present invention and the use of such a material for the production of personal protective equipment are also described. Moreover, a chemical and flash fire escape protective suit is disclosed, including a material according to the present invention, the suit meeting all of the basic requirements according to NFPA 1991, the suit having a minimum breakthrough time of at least 480 minutes for the chemicals according to NFPA 1991 when tested in accordance with EN 374-3 and ASTM F 739 with breakthrough criterion of 0.1 μg/cm²*min, the suit passing the permeation resistance test which lasts more than 180 minutes after flexing and abrasion according to NFPA 1991 and the suit passing the flame test according to ASTM F 1358 and the garment material flame test and the whole suit flash over test according to NFPA 1991 optional flash fire escape.

The invention relates to a novel fabric wrinkling device and a wrinkle resistance test method. The device comprises a wooden base, a hard hollow inner shaft, a hard sleeve and a weight, wherein the wooden base is provided with a circular bump which is matched with the hard hollow inner shaft; the hard hollow inner shaft can be sleeved on the circular bump and is compactly matched with the circular bump; and the inner diameter and height of the hard sleeved are respectively greater than the outer diameter and height of the hard hollow inner shaft. The method comprises a method of wrinkling the fabric and a method of evaluating the wrinkle resistance of the fabric. Aiming at the defect that the wrinkle resistance of the garment worn actually cannot be reflected due to the fact that the difference between wrinkling shape generated by current fabric wrinkle resistance test method and the wrinkling shape of garment worn actually, the wrinkling device which simulates the wrinkling shape of the garment worn actually and the wrinkle resistance test method are designed, so as to obtain evaluation indexes which can be used to reflect the actual wrinkle resistance of the fabric. The novel fabric wrinkling device and the wrinkle resistance test method provided by the invention have the advantages of being simple, rapid and good in simulation effect and the like.

A sole abrasion resistance testing device capable of simulating various environments comprises an experiment table base; two friction experiment devices are arranged at the front end of the experiment table base and mounted at an interval; driving motors used for controlling the movement of the experiment table base, couplers and torque sensors are mounted at two ends of the experiment table base respectively; a hydraulic pressurizing device is mounted in the middle of the experiment table base; a foot model device is connected to the output end of the hydraulic pressurizing device and arranged at the tops of the friction experiment devices. Due to up-down movement of transmission rollers in the friction experiment devices, discontinuous friction of two friction tapes on a shoe, gap between the friction tapes, and replaceability of the friction tapes, the front and back soles of the shoe are abraded by the two friction experiment devices respectively; due to the pressure control of the hydraulic stress application device, and replaceability of a foot model, the walking rules of people can be well simulated; due to torque change measurement of the torque sensors, change of friction coefficient can be obtained indirectly to reflect abrasion degree, so that the obtained data are more direct and accurate.

The invention discloses a voltage resistance test system, comprising a program control power supply model for providing a needed test voltage; a signal collection modulation module for testing the low voltage provided by the program control power supply model, measuring the leak current passing an object when the low voltage meets a preset voltage value, outputting a voltage signal corresponding to the leak current, and cutting off the circuit when the leak current is higher than a preset value; and a control module for controlling the output of the program control power supply module, receiving the low voltage received and processed by the signal collection modulation module, comparing the processed low voltage with a preset value, and receiving the voltage signal output by the signal collection modulation module and corresponding to the leak current when the processed low voltage meets the preset value. The voltage resistance test system has stable performance, improved test accuracy, automatic test parameter configuration, friendly software interface and simple operation.

The invention discloses a phase noise simulator for a broadcast communication transmitter and a phase noise resistance test method, in particular a simulator device for simulating the phase noise of the broadcast communication transmitter and a method for performing a phase noise resistance test on a communication system. The phase noise simulator for the transmitter comprises a phase noise carrier generator, wherein the phase noise carrier generator is used for generating a carrier signal which satisfies a phase noise model, and the working frequency band of the simulator is set by a controller. The phase noise resistance test method tests SNR thresholds of the communication system under a Gaussian white noise channel and under the Gaussian white noise channel after being interfered by the phase noise to obtain a threshold difference produced by the two tests as the resistance of the system to the phase noise of the model. The method and the device can test the resistance of certain communication system to the interference of the phase noise of a plurality of models in a laboratory to summarize the ability of the system in resisting the phase noise, and can compare the performances of the systems to provide a reference for the research and development of the systems.