72results about How to "Improve trial quality" patented technology

The invention discloses an insulating rod testing device, comprising a main support and an auxiliary support which are arranged side by side. The main support and the auxiliary support are respectively equipped with an electroconductive main fixed cross arm and an electroconductive auxiliary fixed cross arm; an active cross arm and a negative cross arm which can be correspondingly locked and connected with the main fixed cross arm and the auxiliary fixed cross arm are respectively arranged above the main fixed cross arm and the auxiliary fixed cross arm; elastic winding electroconductive mechanisms which can elastically wind the periphery of an insulating rod are respectively electrically connected between the active cross arm and the main fixed cross arm and between the negative active cross arm and the auxiliary fixed cross arm. The main support and the auxiliary support are equipped with corresponding slides; sliding poles are inserted in the slides; locking bolts which are used for locking the sliding poles in the slides are arranged at the side walls of the slides; and scale which indicates the length of the sliding poles is arranged at the sliding poles. The insulating rod testing device adopting the structure has the advantages of reasonable structure, high winding speed, high testing efficiency, reliable winding clamping force and high testing quality, thereby being beneficial for improving test efficiency and reliability.

A portable rock structure surface direct shearing tester effectively solves the problems of bulkiness, long test time, large cost, long working period and difficulty in operation of apparatuses, adopts the lever principle to avoid adoption of a hydraulic device, and adopts rocks as a main test target. The tester has the advantages of realization of direct shearing test of a rock structure surface, simplicity, easiness in implementation, convenience in operation, short test cycle and low cost. The tester comprises a platform, a loading rate protection device, a shearing rate loader, a sensor fixing rack, a normal displacement sensor, a line, a normal displacement sensor line, a shearing strain sensor, a load sensor line, a pressurization crossbeam, a force transmission plate, a shearing box, a shearing box upper disc, a shearing box lower disc, a rock sample, a rock sample upper disc, a rock sample lower disc, a structure surface, rollers, a load sensor, a rear butting seat, a lever adjusting shaft, a balance weight, a lever part, a counterweight, a hook, a support, a shearing displacement sensor, a force transmission rack, a collecting system, a collecting device and a pinhole.

The invention relates to the field of unit testing of high voltage transformer products, in particular to a performance testing method for the voltage transformer. The performance testing method for the voltage transformer is characterized in that a frequency modulation voltage-controlled power source is used as a testing power source and a frequency-modulated and voltage-controlled voltage signal is output, the requirements for the exciting voltage of a secondary winding of a tested voltage transformer are met through voltage rising of an exciting transformer, the induction voltage of the first winding of the tested voltage transformer is collected by a voltage sampler, and monitoring is conducted on the output voltage, the frequency and the output currents of the frequency-modulation voltage-controlled power source and high-voltage feedback of the voltage transformer. Compared with the prior art, the performance testing method for the voltage transformer has the advantages that a third harmonic generation power source large in size is replaced, conveying cost of testing equipment is reduced, testing quality is improved, voltage waveform is improved, and disturbance of higher harmonics is avoided. During the testing process, the no-load voltage ratio and excitation characteristic testing can be achieved under the power frequency conditions, and the voltage transformer is multifunctional. Over-voltage protection can be set, and the safety of the tested voltage transformer can be ensured. Equipment is low in weight and convenient to carry.

The invention provides a 10 kv high-voltage circuit breaker electrical test wiring platform based on a six-axis mechanical arm. The equipment is mainly composed of a test system platform, the six-axismechanical arm, a front end clamping jaw, an automatic short circuit module, a cable positioning module, a winding and unwinding module and the like. The test system platform is used for installing test modules such as the six-axis mechanical arm, the automatic short circuit module, the cable positioning module and the winding and unwinding module. The six-axis mechanical arm is mainly used for realizing operation and plugging of a cable; the front end clamping jaw is mainly used for grabbing a cable; the automatic short circuit device is mainly used for realizing connection between a test cable and a circuit breaker in a test process, and simultaneously meeting short circuit requirements between ports of a high-voltage end and between ports of a low-voltage end in the test process. The test cable positioning module is mainly used for placing a test cable and realizing accurate positioning of the test cable; the winding and unwinding module mainly realizes automatic winding and unwinding of the test cables in the test process, and ensures that the test cables are not intertwined.

The invention provides a nuclear power station check valve testing device which is used for a safety injection line check valve seal test, and the device comprises an upstream line, a downstream line, a high pressure introduction component and a pressure detecting piece. The invention also comprises a nuclear power station check valve test method, the pressure of a circuit residual heat removal system is introduced to a check valve line through the high pressure introduction component, the purpose of realizing check valve line pressure introduction without turning on a low pressure safety injection pump is achieved, and the test risk is greatly reduced; the pressure detecting piece is utilized to replace the instrument in the prior art, a high pressure instrument hose is adopted to connect with a pressure meter, the mounting position of the pressure meter is more flexible, so that the readability of the instrument is improved, and the reading error is reduced.

The invention discloses a six-component ring type wind tunnel balance. The balance comprises a balance resistance measuring section, one side of the balance resistance measuring section is provided with a balance cantilever connecting section used for connecting a force measuring model or part; a balance fixed connection section is arranged on the other side of the balance resistance measurement section, a balance front measurement section used for measuring force is arranged between the balance resistance measurement section and the balance cantilever connection section, and a balance rear measurement section used for measuring force is arranged between the balance resistance measurement section and the balance fixed connection section. According to the invention, the limitation of a traditional rod-type wind tunnel balance structure is broken through; a four-face symmetrical structure is adopted, the stress deformation symmetry is good, the anti-interference capacity is high, the bending moment bearing capacity and the temperature characteristic are high, deformation is smaller, the strength is higher, the measurement accuracy is higher under the same output condition, the wind tunnel test quality can be improved, and the engineering application value is high.

The invention discloses a method for evaluating the risk of a clinical test, and the method comprises the steps: dividing collected data into two types, i.e., key data related to the safety of a subject and data quality data, and carrying out the risk evaluation of a hospital where the clinical test participates. According to the method of the invention, various clinical test data can be combinedand then subjected to risk quantification to obtain clinical test safety risk sub-item index data, data quality risk sub-item index data and risk index data of clinical test participation hospitals, and human resources are allocated and monitored according to clinical test risk levels to accurately enter the clinical test participation hospitals. And on the basis of the specific safety risk sub-item index data and the data quality risk sub-item index data, the risk degree of each formed data index is monitored, corresponding monitoring work is executed to achieve the purpose of controlling theclinical test in real time, the rights and interests of the testee are maintained, and the clinical test quality is improved.

The invention discloses a C-band network transceiving system based on time division duplex, and relates to the technical field of communication. The system comprises an airborne end telemetering and remote control unit, wherein the airborne end telemetering and remote control unit comprises an airborne end C-band broadband network transceiver and an airborne end C-band power amplifier, and has thefunctions of network access, network quitting, parameter setting and state detection; and a ground base station type telemetry and telecontrol unit which is composed of a ground end C-band broadbandnetwork transceiver and a base station type C-band power amplifier, and has data transmission functions of TDD duplex data transmission, state detection and parameter setting. The design scheme of theairborne telemetry and telecontrol unit and the ground base station type telemetry and telecontrol unit solves the problem of air-ground real-time high-speed data transmission. Flight inspection shows that the cross-linking relation between the system and the original aircraft equipment is correct, the normal work of the original aircraft equipment is not influenced, the system function is normal, the performance index meets the design requirement, and a solid foundation is laid for the deepening application of subsequent flight data.

The invention is suitable for the technical field of wind tunnel tests, and provides an air inlet channel test simulation device and simulation method, the air inlet channel test simulation device comprises a model support assembly, a model support rod, a model, a flow simulator, a simulator support assembly and a flexible air suction pipe, and the model support assembly is connected with the peripheral part of the model through the model support rod; one end of the flexible air suction pipe is connected with an air outlet of the model, and the other end of the flexible air suction pipe is connected with an air inlet of the flow simulator; the flow simulator is supported on the simulator supporting assembly, and the simulator supporting assembly can be adjusted in a self-adaptive mode along with adjustment of the model supporting assembly. According to the invention, the test data quality and the test efficiency can be improved.

The invention discloses a salt mist scratch test device which is used for scratching a sample by using a cutter. The salt mist scratch test device comprises a base platform, a sample holding device arranged on the base platform and used for holding a sample, a cutter holding device used for holding the cutter, a cutter installing frame arranged on the base platform, a first driving mechanism used for driving the cutter installing frame to translate relative to the base platform along the horizontal direction and a second driving mechanism used for driving the cutter holding device to rotate in a vertical plane relative to the cutter installing frame, wherein the cutter holding device is arranged on the cutter installing frame, and the cutter installing frame can be vertically adjusted so that the cutter is vertically arranged relative to the sample. The salt mist scratch test device is simple in structure, convenient and simple in scratching and capable of meeting the scratching requirement of salt mist tests, effectively improving the testing efficiency and quality and avoiding hurting an operator in a scratching process.

The invention discloses a method for calculating the consistency of the test data and the analytical data of a test piece. The method comprises the following steps: step 1, selecting a test point on the test piece, performing a static test on the test piece under a preset load condition and obtain the test data of the test point; step 2, obtaining the calculated analytical data of the test piece under the preset load condition; step 3, obtaining a position relation of the test point in the step 1 to the test piece in the step 2, and establishing a corresponding relation table of the test point in the step 1 and the test piece in the step 2; and step 4, drawing a correlation curve chart of calculation and testing by calculating the correlation coefficient, mean-square deviation, relative deviation value and the like of the test data and the analytical data. A structural static analysis method provided by the invention realizes comparative calculation of the test measurement result and the structural analysis result of the test piece, contributes to the improvement of the quality of structural analysis and testing, and provides reference data for structural design.

The invention belongs to the technical field of electric power transmission and transformation equipment detection, and particularly relates to a voltage application lead and a cable head holder for withstand voltage test of high-voltage electrical equipment. A lead clamp bolt at the lower end of the lead clamp is in internal thread connection with a detection device at the upper end of a leakage current self-detection device, a detection device bolt at the lower end of the leakage current self-detection device is in internal thread connection with a supporting bar at the upper end of a telescopic insulation supporting bar, internal threads of the lower portion of a supporting rod at the lower end of the telescopic insulation supporting bar is in screwed connection with a base plate bolt of a magnetic base plate, and the magnetic base plate is fixedly sucked to a casing of the equipment. The lead and the holder for withstand voltage test of high-voltage electrical equipment solve the problems that failure of voltage application and damage to equipment due to the fact that the voltage application end discharges to the ground or is grounded due to improper fixing of leads and cable heads in the withstand voltage test are solved, and the working efficiency and safe reliability of the withstand voltage test are improved.

The invention discloses a decoding system of a biss-c protocol based on an FPGA, and belongs to the technical field of inertial navigation systems. The system comprises a BISS-C encoder used for providing a position request and clock information for an absolute encoder, providing position acquisition data synchronized with a clock signal after the clock signal is received, and providing the position acquisition data to a data acquisition module; the data acquisition module, which is used for receiving slo position data of a turntable and navigation data of an inertial system; an encoding module, which is used for encoding according to the position data and the navigation data received by the data acquisition module to obtain encoded data; and a decoding module, which is used for decoding the encoded data received from the encoding module to obtain decoded data. The system has important significance for improving the test quality of an inertial navigation system.

A quartz lamp heater flexible structure comprises a flexible connection tool (12) and a movable fastening tool (15), the flexible connection tool (12) has a long strip shape, and a long strip-like chute (13) is arranged at a center line along a length direction. The movable fastening tool (15) comprises a fastening member (16) and a fastening head (17), the fastening head (17) is installed in the chute (13) via the fastening member (16) on the tail undersurface and slides in the chute (13), and the head of the fastening head (17) tightly clamps one end of a quartz burner. The quartz burner is fixed between two flexible connection tools (12) via the movable fastening tools (15) located on different flexible connection tools (12), and the flexible connection tool (12) is connected with and fixed to a heater support (7). According to the present invention, the problem that a heater is difficult to arranged on a miniature special-shaped test piece is solved, the heating uniformity of a plurality of heated surfaces of different appearance test pieces is improved effectively, the test quality is improved, and the test cost and the test cycle are reduced.

The invention discloses a method for measuring the length of an interference area of a transonic wind tunnel support system. According to the measuring method, Mach number distribution of the centralaxis of a transonic wind tunnel test section is measured through an axial static pressure detection tube and compared with a flow calibration result; and the Mach number deviation 0.005 at the same position is taken as a reference, and when the Mach number deviation at the same position exceeds 0.005, it is considered that the position is interfered by the support system, and the distance S from the current position to the outlet of the transonic wind tunnel test section is measured, wherein S is the length of the interference area. The measuring device used in the measuring method is simple and reliable in structure, convenient to operate and good in repeatability, has high adaptability and high application value, and has important significance in improving the transonic wind tunnel testquality and optimizing the design of a model supporting mechanism.

The invention discloses an intelligent testing device for a 10kV high-voltage circuit breaker, which comprises a server background, a system comprehensive control coordination module, an automatic wiring control module, a controllable and adjustable power supply module and a special test module, and is characterized in that the server background is in bidirectional connection with the system comprehensive control coordination module, the system comprehensive control coordination module is respectively in bidirectional connection with the automatic wiring control module, the controllable and adjustable power supply module and the special test module, the automatic wiring control module is in unidirectional connection with the special test module, and the controllable and adjustable power supply module is in unidirectional connection with the special test module. The high-voltage test of the 10kV high-voltage circuit breaker is realized by adopting an automatic control technology, the traditional manual test process is replaced, and the risk of misoperation accidents in the traditional manual high-voltage test process can be effectively avoided.

The invention relates to an induction withstand voltage testing method for a voltage transformer via a relay protection tester, and belongs to the field of power system test. The method is characterized by comprising the following steps of 1) test preparation; 2) wiring inspection; 3) withstand voltage induction; and 4) inspection of the insulation performance of the voltage transformer, and recovering wiring of the tested voltage transformer after it is determined that insulation of the tested voltage transformer is well. Compared with the prior art, the used relay protection tester, which iscommon and necessary for debugging of a power supply and distribution system and is light and simple, is used to replace a triple frequency generator in large size and many components or a special frequency modulation power supply and a heavy excitation transformer, so that the labor and equipment cost is reduced, and the outpour waveform and test quality are improved. The relay protection testercan set the highest output voltage, so that the safety of the tested voltage transformer can be ensued in the test process.

The invention relates to a handheld single and double grain crop experiment sowing machine and belongs to the field of agricultural machines. The machine comprises a machine frame provided with a sowing device and a sowing leg, and a control mechanism, wherein the control mechanism comprises a handle and a linkage rod hinged to the handle, the sowing leg is a round tube provided with a wedge angle, a baffle is arranged in the round tube, and sowing of the sowing device and opening and closing of the baffle in the sowing leg are achieved through lifting of the handle by means of the linkage rod; the sowing device comprises a seed storage bin and a seed falling bin separated through a partition board, the bottom output end of the seed falling bin is fixedly connected with a sowing tube, the seed storage bin is provided with a lifting mechanism and comprises two seed extraction ejector rods attached to the partition board and a lifting level on the lower portion, a through hole corresponding to the seed extraction ejector rod is formed in the end face of the partition board, a shifting piece capable of blocking the through hole is hinged to the end face of the partition board, and the lifting lever pushes the seed extraction ejector rod to eject seeds so as to enable the seeds to fall into the seed falling bin through the through hole, so that the number of seeds in each hole is accurate. By the adoption of the sowing machine, labor intensity is relieved, and working efficiency is improved greatly; due to the simple structure, manufacturing cost is low.

The invention discloses a universal quantitative pressure application system for pasting a rod type wind tunnel strain balance. The universal quantitative pressure application system is characterizedby comprising a supporting and connecting part, radial force application parts and an axial force application part; the quantitative pressure application control is used as an idea; the stable performance of an integrated frame structure is used; the influence of the temperature on the integral deformation is fully considered in material selection; the quantitative pressure application control onall weights in the process of pasting and curing the strain balance is ensured. Through the universal pressure application system, the problem that a pressure application value cannot be quantified inthe pasting process of the rod type wind tunnel strain balance is solved; meanwhile, the problems of low universality and the insufficient one-time pressure application weight of a pasting clamp aresolved; the inconvenience caused by frequently assembling and disassembling is avoided; the pasting quality and efficiency of the rod type wind tunnel strain balance are improved; meanwhile, the production cost of the pasting clamp is reduced; the quality and the benefit of wind tunnel test are favorably improved.

The invention discloses a finite element analysis method for a composite self-thermal insulation wall. The wall is constructed by using composite self-thermal insulation building blocks, concrete and steel bars together. The method includes the steps of firstly, conducting a continuity assumption, an isotropy assumption and a uniformity assumption on the wall, and meanwhile neglecting the slippage between the steel bars in the wall and concrete; secondly, adopting an integral model to conduct modeling on the wall, and after the definition of masonry wall constitutive, concrete constitutive and steel bar constitutive, selecting a concrete damage plasticity model to conduct nonlinear finite element analysis on the wall. Compared with existing experimental calculation methods, the method can use calculation alone to obtain relevant performance data of the wall, and results can be simulated for calculation and improved before experiments, so that invalid experiments are avoided, and the experiment quality is improved.

The invention provides a method for testing flow characteristics of a control valve of a turboset in a constant power mode. The method comprises the following steps of: putting a coordination mode into a unit CCS coordination control system, and exiting an AGC automatic power generation control function and a CSS / DEH bilateral primary frequency modulation function; maintaining the unit load unchanged, continuously increasing the set bias of the main steam pressure according to a certain rate, and enabling the opening degree of the control valve to be continuously decreased along with continuous increase of the main steam pressure; and synchronously recording and acquiring related thermal parameters under multiple different load test conditions, performing normalization correction and related calculation on the original data, obtaining the flow characteristics of the control valve of the turboset, and further carrying out setting or verification operation of a steam distribution function of a DEH system of the turboset. According to the method disclosed by the invention, due to transverse comparison between different loads or repeated testing of the same load, the system error and random error in the testing process are effectively reduced, and the test efficiency and test quality are obviously improved. The method disclosed by the invention can be applied to offline setting orverification of the steam distribution function of the DEH system and can also be applied to online verification of the steam distribution function of the DEH system.

The invention provides a single seed drill special for a wheat seed selection garden, and belongs to the field of agricultural machine technology. Material quantity of the wheat seed selection garden is large and a seeding rate is low, and monoseeding is required. According the prior art, artificial sowing is used in most seed breeding units with consumed time, consumed labor and bad quality. 'A seed cabin of an automatic seed changing and supplying apparatus of a single seed drill'on an air-suction type single seed-metering device supplies seeds for the seed-metering device, seeds discharged from a discharge plate fall into a top mouth of a seed guiding device housing of an apparatus for improving seeding precision of a single seed drill, the seed-metering device is provided with a plant spacing adjusting apparatus; once the single seed drill moves forward for a certain distance, a distance recorder emits a signal to a controller, and the controller controls seed change and supply and adjusts plant spacing according to a set program. Seed change and supply and plant spacing adjustment can be realized without shutdown, sowing efficiency and sowing precision are improved, and sowing requirements of the wheat seed selection garden is satisfied.

The invention belongs to the technical field of power distribution tests, and particularly relates to a comprehensive test device and method for a primary power distribution device, the comprehensive test device comprises a control unit, a power supply unit and a load unit, and the control unit comprises a KVM assembly, a test host and an interface conditioning box which are in communication connection in sequence; the interface conditioning box is electrically connected with a signal interface box used for providing a signal acquisition interface and a power switching device used for supporting common loading of a plurality of channels, and the output end of the power switching device is electrically connected with a power interface box used for providing a power supply / load interface. According to the invention, functions and performance of a tested product can be comprehensively tested, whether each test item is qualified or not can be rapidly judged, the test mode is efficient and accurate, the safety and reliability of use of a primary power distribution device are better guaranteed, the direct installation of a fault product is avoided, the system test efficiency and quality of aircraft assembly are improved, and the aircraft accident rate is reduced.

The invention belongs to the technical field of hypersonic wind tunnel test equipment, and discloses an electric heating element for a large-flow high-temperature high-pressure high-speed gas environment and a processing method. The electric heating element adopts a clamping plate type structure and comprises a plurality of electric heating tubes arranged in parallel, an upper surface clamping plate covering the upper surfaces of the electric heating tubes, a lower surface clamping plate covering the lower surfaces of the electric heating tubes, and a protection box covering the neutral ends of the electric heating tubes. According to the machining method, an upper surface clamping plate, an electric heating pipe and a lower surface clamping plate are clamped and folded through a tool, then a pin penetrates through the upper surface clamping plate and the lower surface clamping plate, the upper surface clamping plate, the lower surface clamping plate and a protection box are welded through argon arc welding, and the electric heating element becomes a square body. The electric heating element adopts a clamping plate type structure, the strength of the electric heating element can be improved, the contact area is increased, the heat exchange efficiency is improved, and the wind tunnel test quality and efficiency are ensured. The processing method is simple and reliable, high in precision and small in deformation.

The invention discloses a parametric design method for a quartz lamp heater, which belongs to the technical field of aerospace vehicle environment simulation. The invention uses constraints to express the shape characteristics of the quartz lamp heater, defines a set of parameters to control the design results, modifies the design model of the quartz lamp heater by changing the parameters, and creates design schemes of the quartz lamp heater for different test objects and test conditions . This method provides a fast and practical design method for quartz lamps for test designers specialized in structural thermal strength, and realizes the rapid design of ground thermal tests, thereby achieving the purpose of reducing test costs and improving test quality and level.

The invention discloses an automatic testing device for work cycle performance of a valve for a water spraying fire extinguishing system. The device comprises an air pump, a water boosting pump, a reservoir and a valve sample. The water boosting pump is connected with the reservoir. The right side of the valve sample is connected with the water boosting pump, and the left side is connected with awater outlet pipe. Water falls into the reservoir from the water outlet of the water outlet pipe. The top end of the valve sample is connected with a valve sample cyclic action control device. The valve sample cyclic action control device is connected with a hollow shaft torque measuring motor. The hollow shaft torque measuring motor is fixed to the lower end of a vertical telescopic shaft I. A telescopic shaft motor I is fixed to a horizontal board. The horizontal board is welded to a frame. The frame is fixed on ground. An air pump is connected with a pneumoelectric rotatable joint. The pneumoelectric rotatable joint is connected with a valve sample cyclic action control device. The automatic testing device can automatically determine whether opening or closing of the valve in an experiment is flexible and whether component damage occurs, reducing artificial interference factors, improving testing automation, improving testing quality and efficiency.

The invention relates to the technical field of pipeline joint testing devices, in particular to a device for testing the tightness of a spherical joint of a high-pressure pipeline of an automobile engine and a using method thereof. The testing device of tightness of high-pressure pipeline spherical joint of automobile engine simulates the working conditions of the high-pressure pipeline and the spherical joint of the automobile engine, in particular to the matching of a conical surface and a spherical joint on a high-pressure pipeline of an automobile engine, namely the matching of the conical surface of the rear section of the positioning through hole and the front end of the spherical joint. The testing device of tightness of high-pressure pipeline spherical joint of automobile engine has the advantages of being stable in structure and high in matching degree, providing key parameters for the design of the spherical joint of the high-pressure pipeline, improving the test efficiencyand the test quality, and ensuring the high-pressure pipeline sealing safety of the automobile engine.

The invention discloses a method for effectively improving the cut-out rate of pathological parathyroid tissue sections of experimental animals. The method comprises the following steps: euthanasia ofan experimental animal; dissection; removal of a parathyroid together with a thyroid; fixation via neutral formalin with a concentration of 10%; marking with a hematorylin solution; dehydration; paraffin embedding; slicing; and dyeing. Through comparative study of the method provided by the invention and traditional preparation methods, the novel section preparation methods increases the parathyroid cut-out rate of the animal to 100% from conventional 50 to 70%; and the method is simple, easy to master, extensively applicable to preparation of parathyroid tissue sections of experimental animals, and capable of effectively preventing the situation that the parathyroid is lost or cannot be cut out during slicing.

The invention relates to a full-automatic real-time digital simulation list-type test method. The full-automatic real-time digital simulation list-type test method comprises the following steps: (1) reading an itemConfig.xml configuration file and obtaining a to-be-tested item list; (2) finding test supergroup information where a to-be-executed test item belongs and test information of the item according to order of the item list; (3) starting a model corresponding to a test supergroup; (4) performing the test item; (5) repeating step (2) to step (5) to perform all the test items in the item list. The test item list is flexibly customized and adjusted according to different requirements, manpower is greatly saved, possibility of misoperation is reduced, and test quality is improved.