191results about How to "Improve testing capabilities" patented technology

The invention provides a high-density printed circuit board (PCB) test machine comprising a material platform, PCB clamping sampling mechanisms, an automatic material feeding and discharging device, a test clamp and a central controller. Due to the combination of the operation of the automatic material feeding and discharging device and the control of the alignment of the PCB clamping sampling mechanisms and the test clamp, the PCB can be tested automatically, and the PCB test capacity, precision and efficiency of the high-density PCB test machine can be greatly improved. The invention also provides a high-density PCB test method based on the high-density PCB test machine. Due to the unified material loading and the combination of the two PCB clamping sampling mechanisms, the two PCB clamping sampling mechanisms can collect the images of the PCBs thereon at the same time and feed back the collected images of the PCBS to the central controller to test the alignment of the two PCB clamping sampling mechanisms and the test clamp. Due to the timely material unloading and the material reloading after the test of two PCB clamping sampling mechanisms and the test clamp, the standby time of the test clamp is shorted to the maximum extent, the whole test process is standardized, and the test efficiency is ensured.

The invention relates to a corrosion test device with a field in-situ electrochemical test function in a natural sea area environment, belonging to the technical field of electrochemical corrosion tests. The main structure of the corrosion test device comprises a reference electrode lead wire, an auxiliary electrode lead wire, an auxiliary electrode, a reference electrode, a probe shell, a samplesealing structure shell, a sealing ring, a pressure spring, a fastening bolt, a sample and a sample lead wire, wherein an electrochemical test probe and a sample sealing structure are designed into split type structures; the electrochemical test probe consists of the reference electrode, the reference electrode lead wire, the auxiliary electrode and the probe shell and is rotated to the sample sealing structure through screw threads positioned at the front of the probe shell; the sample sealing structure shell is processed by and made of plastic and nylon or other non-metal materials; and thesample or the researched electrode is hermetically fixed by the O-shaped sealing ring and sealing stuffing. The invention has simple and reliable structural principle, convenient use and operation andgood test accuracy.

The invention discloses a multi-mode operating free piston shock tunnel which comprises a tunnel body, a distributed vacuum system, an air supply system and a track supporting system, wherein the tunnel body comprises a driving mechanism, a shock tube section, a single-film capsule mechanism, a spray tube and a test tube section; the distributed vacuum system is capable of vacuumizing the drivingmechanism, the shock tube section and the test tube section; the air supply system supplies air to the driving mechanism and a shock tube section; and the tunnel body is sequentially and coaxially connected with the shock tube section, the single-film capsule mechanism, the spray tube and the test tube section in a sealed manner. By taking equipment of free piston high-enthalpy shock tunnel as thebasis, by virtue of rapid replacement, connection of various components and match of a three-use main capsule mechanism, the tunnel has test abilities of two states, namely a conventional a low-enthalpy shock tunnel and a long-term medium-enthalpy shock tunnel, the application range of the tunnel performance and the test ability are improved, and the operating cost is reduced.

The invention discloses a small-range high lift-drag ratio force-measuring balance applied to a low-density wind tunnel. The small-range high lift-drag ratio force-measuring balance comprises a main balance body; and a model connection end, a first combined measuring component, an axial force measuring component, a rolling moment measuring component, a second combined measuring component and a fulcrum bar are arranged at the main balance body successively. According to the invention, the axial force measuring component and the rolling moment measuring component are arranged in the middle of the balance measuring component and the combined measuring components are arranged at the two ends symmetrically so as to reduce the interference on the axial component and rolling torque component by the large normal and pitching torque loads, thereby measuring the rest of four components except the axial force and the rolling torque. On the basis of the designed load and appearance dimension of the small-range high lift-drag ratio force-measuring balance, the force measuring testing requirement of the low-density wind tunnel with the large lift force and complex appearance model is met and thetesting capacity of the low-density wind tunnel is improved effectively. Meanwhile, the anti-interference capability of the axial force measurement precision is enhanced; and the rolling torque sensitivity and measurement accuracy are improved.

The invention discloses injecting equipment and an environment simulation system based on the injecting equipment, wherein the injecting equipment and the environment simulation system are used for the direct connection test of a novel stamping engine. According to the technical scheme of the invention, the equipment and the system solve the problems in the prior art that an existing test environment simulation system cannot simulate the air inflow condition and meet the requirement on the injecting capacity, and is low in injecting efficiency and large in investment scale. The injecting equipment comprises a plurality of steam injecting units arranged on the gas collecting pipe of the simulation system. Each steam injecting unit comprises a high-flow steam generator and a set of two-stage steam injection pumps, wherein the set of two-stage steam injection pumps is formed through the serial connection of a first steam injection pump and a second steam injection pump. The output end of the high-flow steam generator is respectively connected with the first steam injection pump and the second steam injection pump. The first steam injection pump is connected with the gas collecting pipe through a steam injection pipe. A first steam injection and isolation valve is arranged between the first steam injection pump and the gas collecting pipe. A second steam injection and isolation valve is arranged between the first steam injection pump and the second steam injection pump.

The invention relates to a state adjustment method for performance testing of a multi-stage compressor with a high total pressure ratio. On the basis of combined and coordinated adjustment of four physical parameters including a compressor rotating speed, a compressor adjustable stationary guide blade angle, a tester intake throttle valve opening degree, and a tester exhaust throttle valve openingdegree, the test working state of the compressor is controlled. The working state of the compressor is controlled to be in a region near of blocking points of all equal-rotating-speed working lines to carry out speed increasing and decreasing. On the condition of multi-row stationary guide blade single adjustment, successive adjustment from back to front in a rotating speed increasing state and successive adjustment from front to back in a rotating speed decreasing state are carried out, so that the need of in-stage matching rule optimal adjustment of the compressor at a non-designing rotating speed is met. According to the invention, with reasonable utilization of the flow resistance effect of the tester intake throttle valve of the compressor, the power consumption of the compressor isreduced at the intake throttle valve; and because of combined matched adjustment with the tester exhaust throttle valve, real-time precise control of the working state of the compressor is realized.

The invention discloses a transonic wind tunnel test supporting device, an installation method and application thereof, and aims to solve the problems that the test result is partially distorted, certain potential risk is present and the accuracy of test data is influenced when an aircraft carries out wind tunnel test by adopting an existing concave bent supporting mechanism. In the device, the existing concave bent supporting structure is improved, so that the test result is more accurate; meanwhile, the bearing mode is changed into tension-compression bearing, so that the longitudinal bearing area, rigidity and strength are improved, and model vibration in test is reduced. Under the coordination of a linear supporting rod and a wind tunnel curved knife, the device can realize continuous variable attack angle test, the attack angle variation range is enlarged, and the test efficiency is greatly improved. The device is reasonable in design and simple in structure, can effectively improve the accuracy of data and the efficiency of test and reduce vibration in test, and has a good application prospect.

The invention discloses a water turbine speed regulator embedded control object model simulation method. A water turbine model, a generator model and a fault diagnosis module are embedded in a water turbine speed regulator; through acquiring basic parameters of an actual controlled water turbine and a generator set, the water turbine model and the generator model are respectively abstracted into Laplace transfer function expressions; differential discrete transformation of the Laplace transfer function expressions is carried out for program calculation, water turbine guide vane relay feedbackis acquired to input to the water turbine model, output of the water turbine model is inputted to the generator model, the generator rotation speed and the active power output are calculated; the generator rotation speed and an active power signal are fed back to an actual speed regulator cabinet, and rotation speed and power closed loop control on a speed regulation system is realized. The methodis advantaged in that the method is independent from external simulation equipment, the simulation test and fault diagnosis of the speed regulation system can be realized through utilizing self resources of the speed regulator, and factory test integrity of the speed regulator equipment is improved.

The invention discloses a converter transformer double side voltage applying partial discharge testing device and a testing method thereof. The testing device is composed of a variable-frequency power supply P1, an exciting transformer T1, an exciting transformer T2, a compensation reactor L1, a compensator reactor L2, capacitive voltage dividers C1-C6, a partial discharge detector, a grounding terminal block Em and current transformers CT1-CT4. The invention provides a converter transformer double side voltage applying partial discharge testing method for the first time, and establishes a converter transformer double side voltage applying partial discharge test wiring method and converter transformer double side voltage applying partial discharge test procedures. Compared with a traditional partial discharge method, the testing method disclosed by the invention greatly improves test effects and the test efficiency. The converter transformer double side voltage applying partial discharge testing device and the testing method thereof have popularization values through experimental verification, and provide valuable guidance and reference for exploring a transformer partial discharge testing method.

Provided is a dynamic detection method for simulating angular contact ball bearings in a meteorological satellite scanning mechanism. A detection process is achieved through four groups of test unit assemblies and magnetic fluid seal transmission assemblies in a detection device, paired angular contact ball bearings, namely a first angular contact ball bearing and a second angular contact ball bearing, are assembled in the four test unit assemblies, a molecular pump and a mechanical pump in the detection device can provide a high vacuum degree of 10-5Pa, the environment temperature is controlled to be within the range from the normal temperature to 50 DEG C, a servo motor provides continuous rotation and reciprocating swinging for the four groups of test unit assemblies, a computer monitoring program sends parameter request commands of the swinging speed, the swinging angle and the rotating speed of the servo motor in the detection process, meanwhile real-time detection is carried out by the computer monitoring program on the four groups of paired angular contact ball bearings in the four groups of test unit assemblies according to set detection contents in advance, and scientific, real and reliable monitoring bases are provided for evaluation of dynamic simulation performance or the service life of the angular contact ball bearings in a meteorological satellite.

The invention discloses a transition profile calculation method for a variable cross-section shape high-speed wind tunnel test section. According to the transition profile calculation method, a cubiccurve, a bicubic curve and a quintic curve are adopted to design a transition profile; through computer numerical simulation, speed distribution cloud charts of rectangular section test section inletsof transition profiles of the cubic curve, the bicubic curve and the quintic curve are obtained respectively, whether a test section flow field meets high-speed wind tunnel test requirements or not is evaluated, curves which do not meet the requirements are excluded, and curves which meet the requirements are reserved; and machining process evaluation is carried out on the curves meeting the requirements, and the cubic curve is determined as the molded line of the transition profile. The transition profile calculation method is suitable for transforming an existing high-speed wind tunnel, expands the test field of the existing high-speed wind tunnel, and has high adaptability and high application value.

The invention belongs to the technical field of ramjet engine tests, and in particular relates to a vacuumizing system and a vacuumizing method for a vacuum cabin of a ramjet engine. The system comprises a vapor source, a vapor distributer, a first-stage ejection device, a second-stage ejection device, a muffling tower and a switch valve, wherein the first-stage ejection device and the second-stage ejection device are connected in series; a vapor inlet of the first-stage ejection device communicates with the vapor distributor through the switch valve; a vapor inlet of the second-stage ejection device communicates with the vapor distributor; a vapor outlet of the second-stage ejection device communicates with the external environment through the muffling tower; a vacuumizing inlet of the first-stage ejection device communicates with the vacuum cabin to be vacuumized; and the vapor distributor is connected with the vapor source. The system and the method, provided by the invention, have the advantages of large working range and high vacuumizing ability.

The invention discloses a megawatt level mechanical total power sealed gear test-bed which solves problems that investment is large, energy consumption is serious, assembling and use requirements are influenced as a position of a structure is fixed when a performance and a service life of a megawatt level speed reducer are tested by using a conventional electric power sealed gear test-bed. An input end of a primary test speed reducer is connected with an input sensor; an input end of a secondary test speed reducer is connected with an output sensor; at least one pair of right angle gear boxes are connected in series between the input sensor and the output sensor; a mechanical loader is arranged between the two right angle gear boxes; the right angle gear boxes are connected with the mechanical loader through a transmission shaft; and an input end of any one of the right angle gear boxes is connected with a motor. Through a reasonable design, thereby overcoming the problems that the conventional electric power sealed gear test-bed has larger investment and serious energy consumption; power for driving the motor is reduced to be about 1/10 that of an original power; cost is reduced, and at the same time, a test effect is improved; and the test-bed has the advantages of simple structure and convenience in operation.

The invention discloses a device for improving the test ability of a power capacitor. The device comprises a base; a conveying groove is formed in the middle of the upper end of the base; multiple conveying rollers are arranged in the conveying groove and are rotationally connected onto the inner wall of the conveying groove through rotating shafts; a device cavity is formed in the base; worms arearranged at the upper end of the base, penetrate through the side wall of the base and extend into the device cavity; one end of each worm is rotationally connected onto the inner wall of the devicecavity; a rotating wheel is arranged at the other end of each worm; worm gears are arranged in the device cavity; one end of each worm gear is rotationally connected onto the side wall of the device cavity; a cylinder is arranged at the end, far away from the inner wall of the device cavity, of each worm gear; and a strip-shaped groove is formed in the inner wall of the conveying groove. The device is reasonable in structural design and easy to operate, the labor intensity of a worker is effectively reduced, the working efficiency is improved, and meanwhile, the test ability of the power capacitor is improved.

The invention relates to a subsonic-transonic flow field ejection operating method for a transient type subsonic-transonic-supersonic wind tunnel. The method has the advantages that the subsonic-transonic flow field ejection operating manner is created on the basis of the structural features of the transient type wind tunnel to effectively lower load under the inspiration of supersonic flow field stamping ejection operation manner; the subsonic-transonic-supersonic wind tunnel usually comprises a main pressure regulating valve system, a stamping ejector system and an increment ejector system, and accordingly a blowing test has various combined operating manners; the subsonic-transonic flow field ejection operating manner is creatively used, the load can be lowered evidently, model and scale safety can be guaranteed during the subsonic-transonic blowing test and especially 0.8-1.2 high-mach-number tests, the test can be completed smoothly, and the test capacity of the wind tunnel is expanded greatly.

The invention discloses a chicken whole blood simple, convenient and quick DNA extraction method which comprises the following steps of after adding chicken whole blood in an anticoagulant, adding a mixture in lysate for mixing, putting a mixture in a water solution boiler with the temperature being 56-60 DEG C for 20-30min, adding a separating medium in a product, putting a mixture in the water solution boiler with the temperature being 70-80 DEG C for 20-30min for centrifugation, taking a supernate, transferring the supernate into another EP pipe, adding a precipitated solution, performing centrifugation, reserving precipitates, adding a washing solution, and performing uniform mixing and centrifugation; and carefully discarding the supernate, collecting the precipitates, drying the precipitates at the room temperature, and adding a TB buffer liquid to obtain a chicken DNA extracting solution. By adopting the chicken whole blood simple, convenient and quick DNA extraction method provided by the invention, the purity and the integrity of extracted DNA can both reach test requirements, and the concentration and the purity are superior to that of DNA extracted by an existing kit. Bycombining with application on a chicken molecular breeding aspect, proved that the method is an environment-friendly DNA extraction method with low cost and simple operation.

The invention discloses a flexible loading system for an underground pressure three dimensional physical simulation test platform, which comprises a pressure supply device and a model; the invention is characterized in that a liquid-filled bark pocket is arranged between the pressure supply device and the model, as well as pressure provided by the pressure supply device acts on the surface of the model by the liquid-filled bark pocket. The invention mainly has the advantages: in the loading process, load is forced on the surface of the model by the lower part of the liquid-filled bark pocket to cause the model to be uniformly pressed, thereby, the negative influence on a whole experiment caused by rigid loading in the prior art can be overcome, and the test effect is beneficial to being enhanced. In addition, a corresponding flow meter is arranged on a pipeline of a liquid supply system to lay a foundation for surface subsidence estimation and prediction.

The invention relates to an electric loading multifunctional test bench for a power-dividing hydraulic mechanical composite transmission system and an application thereof, wherein the test bench comprises a mechanical part and a control part. An electric loading multifunctional test bench for a power-dividing hydraulic mechanical composite transmission system provided by the invention can realizethe performance test of the hydraulic transmission unit of the hydraulic mechanical composite transmission system, the transmission performance of the hydraulic transmission unit of the hydraulic mechanical composite transmission system is tested by simulating the actual driving condition and working condition of the applied vehicle, one-stage and multi-stage performance test of the hydraulic mechanical composite transmission hydraulic transmission unit, proportion test of mechanical and hydraulic power flow of the composite transmission system and automatic optimization distribution ratio ofmechanical and hydraulic power flow can be realized, and the optimal combination distribution scheme of mechanical and hydraulic power flow is finally realized according to the matching characteristiccurve of the engine, which provides power performance optimization of vehicles for the hydraulic mechanical composite transmission system put into production in the future.

The invention relates to the technical field of automotive chassis tests, and in particular relates to a heavy chassis dynamometer road resistance simulation control system and method. The system comprises a first control module, a second control module, a first detection module and a second detection module; the first detection module is used for detecting the rotation speed and the torque of a first motor; the first control module is used for computing an overall loaded control quantity, also used for computing a difference between the overall loaded control quantity and the torque of a second motor, and thus acquiring an actual loaded control quantity, and also used for putting the difference between the actual loaded control quantity and the torque of the first motor into a closed loopPID control algorithm to acquire a control output quantity, and controlling the torque of the first motor; and the second control algorithm is also used for controlling the second motor and the firstmotor to keep consistent rotation speed. According to the heavy chassis dynamometer road resistance simulation control system and method provided by the invention, the problem that the existing dynamometer road resistance simulation capacity cannot meet experimental requirements of the heavy automobile can be solved.

The invention relates to the technical field of radar countermeasure, and discloses a data processing method of radar countermeasure equipment test decision evaluation based on a rule engine. Throughadoption of flow chart graphical modeling of radar countermeasure equipment test data processing, a flow modeling method of directed graph element representation, XML definition and modular modeling,as well as the processes of flow analysis, process decomposition, graphical modeling and parameter configuration, custom design of a logical structure of the data processing flow of radar countermeasure equipment test is realized, that is, a radar countermeasure equipment test decision evaluation system is developed by the decomposition of the test data processing flow, structured modeling of thedata processing rule, resolution and execution of the data processing rule based on the rule engine, and analysis of a test evaluation result based on a process data class. The resolution and execution of the data processing rule for radar countermeasure equipment test are realized. The method can quickly judge the action of countermeasure and quickly evaluate the test result, and is of great practical significance for improving the test efficiency and test capability.

The invention discloses a reciprocating leaching experimental device and an experimental method. The device comprises an experimental platform deck, a leaching device and a monitoring device, whereinthe leaching device comprises a leaching column, a filtrate mechanism, an air supply mechanism and an overturning mechanism; the monitoring device comprises a master controller, an overturning counting device and a timing unit, a first air pressure measuring unit and a second air pressure measuring unit; the experimental method comprises the following steps: I, preparation of the leaching experiment; II, assembling and adjusting of the leaching experimental device; III, multiple reciprocating leaching experiments and data finishing; and IV, finishing and cleaning of the reciprocating leachingexperiment. The device is reasonable in design, achieves reciprocating leaching of multiple media, reduces the consumption of the leaching liquid, can simulate the leaching experiments in various conditions, acquire the target element total amount difference and the leaching rate after the leaching test or the change condition of the medium adsorption rate, improves the leaching experimental efficiency and precision, and is high in practicality.

The invention relates to a waterproof method for seams of a high-water-pressure small-section shield tunnel. The waterproof method comprises the following steps: arranging a seam waterproof structure at a ring seam of a tube piece; determining seam waterproof designed pressure P0; determining maximum open amount of the seam of the tube piece and maximum staggered joint amount and closed compression force of the tube piece; setting a hole pattern structure, hole size, hole number and hole arrangement of an elastic sealing gasket and the section size of the elastic sealing gasket; carrying out waterproof performance test of the seam of the tube piece, and testing whether sealing and waterproofness of the seam meet requirements or not; if sealing and waterproofness of the seam meet the requirements, finishing waterproofness of the seam; and if sealing and waterproofness of the seam do not meet requirements, and returning to adjust parameters of the elastic sealing gasket. By the waterproof method, the problems that in the prior art, the design is inaccurate, the basis is not enough, and the schedule of the process cannot be followed up can be solved, and series of problems of material selection is lack of guidance, delivery-receiving acceptance of the project is not facilitated and the like are also solved.