15 results about "Oscillation test" patented technology

The invention discloses a broadband oscillation test system and test method for a converter, and relates to the technical field of electrical equipment testing, and the system comprises an equipment configuration and access module, a test mode switching module, a test operation and data acquisition module, a data automatic analysis module and a test report generation module. By constructing a closed hardware test loop, the comprehensiveness of the broadband oscillation test of the converter is improved, in a data analysis link, a broadband oscillation characteristic frequency identification formula is introduced, a time domain signal is converted into a frequency domain signal through fast Fourier transform, the broadband oscillation characteristic frequency is obtained, and meanwhile, through an oscillation amplitude normalization formula, the frequency domain signal is converted into the frequency domain signal to obtain the broadband oscillation characteristic frequency. According to the method, the oscillation amplitude after normalization is obtained, the dimensional difference under different working conditions is eliminated, in addition, a system impedance matching degree formula and a stability comprehensive evaluation index formula quantify the stability from the aspect of impedance matching and multi-parameter comprehensive evaluation, and the whole process from feature extraction to risk evaluation is covered.

The invention discloses an online evaluation method and system for an oscillation monitoring algorithm, and the method comprises the steps: obtaining diversified oscillation test cases, and marking the oscillation characteristics of each case; the method comprises the following steps: configuring a test plant station in an actually running power system, adopting a high-precision sending mechanism by the test plant station, generating an analog data message consistent with a time mark and a format of an actual PMU message according to an oscillation test case, and sending the analog data message to a message bus; and performing oscillation detection on the analog data message received by the message bus by applying an oscillation monitoring algorithm, and comparing an oscillation detection result with the oscillation characteristics of the corresponding oscillation test case to obtain an evaluation result of the oscillation monitoring algorithm. The method can truly reflect the performance of the oscillation monitoring algorithm in an actual environment without influencing the actual operation of a power grid, improves the accuracy and reliability of the algorithm, has the advantages of high authenticity, high reliability and comprehensive coverage, and is suitable for online evaluation and optimization of the oscillation monitoring algorithm of the power system.

The utility model discloses a terminal anti -swing test seat, including upper insulating seat, lower insulating seat and conductive terminal structure, the upper end surface of lower insulating seat is provided with the accommodation groove, the conductive terminal structure includes the action terminal and static terminal of setting in the accommodation groove, the one end of action terminal and static terminal elastic abutment, the lower end of upper insulating seat is provided with the anti -swing structure, and the anti -swing structure is used for action terminal horizontal limit, the bottom of accommodation groove is provided with terminal action groove, in the utility model, through setting the anti -swing structure in the lower end of upper insulating seat, can be in horizontal direction to action terminal horizontal limit, reduce the horizontal deviation of action terminal, thereby reduce the influence of the assembly precision of action terminal to its deformation amount in the test state, avoid action terminal after the probe insertion of test probe and cause the excessive deformation and lead to the original state of being unable to restore.

The application discloses an analysis system and method based on first principle and quantum oscillation test, and the analysis system comprises a data input module, a preprocessing module, an operation module and an output module, wherein the operation module comprises an extreme value orbit visualization unit used for visualizing the position of an extreme value orbit in a Fermi surface, an extreme value curve visualization unit used for outputting a frequency change diagram of the corresponding extreme value orbit in a calculation process, and a Fermi surface selected area calculation unit used for effectively improving the calculation efficiency for a complex Fermi surface. The application can quickly and accurately screen and determine the quantum oscillation frequency and effective mass information of relevant materials based on the marching cubes, slice-to-slice orbit matching in SKEAF and hdbscan algorithm, and further determine the Fermi surface characteristics of the materials, which has important significance for the research on the electronic structure and physical properties of quantum materials.

A simulation mechanism for heaving oscillation test of a large-sized aircraft, belonging to the field of aircraft tests, comprises a turntable base, a large-sized aircraft, a support unit, a motion unit and a fixing unit. The large-sized aircraft is installed on the support unit, and the support unit can adjust the angle change of the angle of attack of the large-sized aircraft. A hole is formed in the middle of the turntable base. The upper end of the motion unit passes through the hole and is fixedly connected to the support unit. The fixing unit is located below the turntable base and is fixedly connected to the lower plane of the turntable base. The motion unit is connected to the fixing unit and can move in the vertical direction, driving the large-sized aircraft to perform heaving motion along the direction perpendicular to the oncoming flow of the wind tunnel. This mechanism can increase the size of the low-speed dynamic derivative heaving oscillation test model to the order of 3-4 m, realizing a leapfrog improvement in the test Reynolds number simulation ability, and providing more real and stable data for the development process of large aircraft.

The application provides a tilting and rolling test device and a control method of the tilting and rolling test device. The tilting and rolling test device is used for providing a rolling platform for a ship model fixed on the tilting and rolling test device to simulate the rocking of a ship under the action of sea waves. The tilting and rolling test device comprises a controller, a base, a hydraulic actuator assembly and a rolling support. The base is fixed on the ground or a pre-buried base. The base and the rolling support are rotationally connected. The hydraulic actuator assembly comprises a hydraulic oil circuit system and an actuator driven by the hydraulic oil circuit system. The hydraulic oil circuit system is controlled by the controller, and the actuator is fixedly connected with the rolling support. The hydraulic oil circuit system is used for driving the actuator to move in a horizontal direction under the control of the controller, and driving the rolling support to tilt or roll through the actuator. The tilting and rolling test device and the control method of the tilting and rolling test device can accurately simulate the rocking of a ship to guide the design of the ship.

The invention provides dust collector floor brush swing testing equipment and a using method thereof, and relates to the technical field of dust collector floor brush swing testing. The device comprises a supporting frame and detection equipment, the upper end of the detection equipment is fixedly connected with a display, the side surface of the supporting frame is fixedly connected with a swing table, the inner side surface of the supporting frame is provided with a movable plate, and the lower side surface, close to the swing table, of the movable plate is fixedly connected with a supporting rod; the supporting rod is rotationally connected to the inner side surface of the supporting frame. When an arc-shaped plate in the swinging device moves through the radian of the arc-shaped plate, an adjusting block gradually gets away from the joint of a rolling brush head and a first connecting block, so that a second spring pulls a connecting roller, and the action of pulling the rolling brush head during manual use is simulated; and the adjusting device is arranged to provide pressure for the connecting roller to simulate the action of manually pushing the rolling brush head for testing, so that the testing accuracy is improved, and more real and reliable data are provided.

The invention belongs to the technical field of clinical examination, particularly relates to a medical clinical examination oscillation reaction device, and provides the following scheme aiming at the problems that an existing oscillation reaction device only has one oscillation mode and a single oscillation mode, cannot meet the examination use requirements of different drugs and is inconvenient to fix examination oscillation test tubes with different sizes. The power distribution base comprises a power distribution base body, four ground feet are arranged at the bottom of the power distribution base body, heat dissipation holes are formed in the outer side of the power distribution base body, and a vibration bin is arranged at the top of the power distribution base body. The test oscillation test tube is fixed in an inflation mode, the test oscillation test tube fixing device can adapt to test oscillation test tubes of different sizes, the test oscillation test tube can be oscillated left and right and can also be oscillated in a rotating mode, or the test oscillation test tube and the test oscillation test tube can be oscillated at the same time in different medicine oscillation modes, and the clinical examination use requirements of different medicines can be met; the inspection oscillation test tube fixing plate can be conveniently detached and cleaned.

The present invention belongs to the field of clinical testing technology, and in particular to a medical clinical testing oscillation reaction device. In view of the problem that the existing oscillation reaction device has only one oscillation mode, the single oscillation mode cannot meet the use requirements of different drug tests, and it is inconvenient to fix test oscillation test tubes of different sizes, the following scheme is proposed, which includes: a power distribution base, the bottom of the power distribution base is provided with four feet, the outer side of the power distribution base is provided with heat dissipation holes, and the top of the power distribution base is provided with an oscillation bin. The present invention adopts an inflatable method to fix the test oscillation test tube, which can adapt to test oscillation test tubes of different sizes. Not only can the test oscillation test tube be oscillated left and right, but also rotationally oscillated, or both can be oscillated at the same time. Different drug oscillation modes can meet the use requirements of clinical tests of different drugs, and the test oscillation test tube fixing plate can be easily disassembled and cleaned.

The utility model discloses a kind of experimental constant-temperature oscillation test tube fixing frame, it is related to experimental equipment technical field, including: two clamps one, for parallel arrangement, its upper and lower are uniformly provided with notched; clamp two, between two described clamps one, it is elastically slidably arranged, it is also provided with described notched on it, the notched on the clamp one and the notched lateral wall on the clamp two form test tube clamping area;The test tube in this scheme is placed, will not directly fall into the bottom of clamping area, can be first fallen on step, after transverse moving clamp two, can make test tube reach the bottom, by twice operation, reduce the speed of test tube falling, avoid test tube because of rapid falling and the violent collision of clamping area bottom, effectively protect test tube from being damaged, only need to insert test tube into the notched of clamp one in upper side during use, it is simple and quick to operate.

The utility model discloses a horizontal oscillator for solid waste toxicity detection, and relates to the technical field of toxicity detection equipment. The device comprises a bottom frame, a driving assembly is installed on the outer wall of the right side wall of the bottom frame, a rotating shaft penetrates through the right side wall of the bottom frame to be connected with a disc in the buffering assembly, an elastic piece is installed on the outer wall of the other side of the disc, the disc is connected with an adjusting disc in the adjusting assembly through the elastic piece, and a bearing assembly is further arranged at the bottom of the inner side of the adjusting disc. The shaft end of the motor is connected with one end of the reset reed, the other end of the reset reed is connected with the fixing sleeve, and the fixing sleeve in the adjusting assembly is connected to the shaft end of the clamping rod in the clamping assembly in a sleeving mode. According to the oscillation test tube clamping device, the distance between the clamping rod and the bearing plate can be adjusted through the adjusting assembly, oscillation test tubes with different calibers are clamped and positioned, the bearing plate and the clamping rod are in contact with the outer walls of the oscillation test tubes through the rubber sleeves and the rubber plates respectively, and the effect of protecting the oscillation test tubes is achieved.

The utility model belongs to the field of rolling bearing test experiments, and particularly relates to a rolling bearing high-temperature working condition simulation and motion test experiment device which comprises a swing driving device, a main shaft supporting device, a high-temperature test device and a loading device. Swinging driving force generated by a rack and a swinging gear in the swinging driving device is transmitted to a main shaft of the main shaft supporting device through a coupler to drive the main shaft to rotate in a reciprocating mode, a tested bearing is assembled on the main shaft and synchronously rotates along with the main shaft, and the high-temperature testing device is assembled on the main shaft. The environment temperature of the tested bearing is controlled by heating the main shaft, the loading device comprises an axial loading device and a radial loading device, the axial loading device provides an axial load for the tested bearing, and the radial loading device provides a radial load for the tested bearing. The device can simulate the state of the tested bearing under the condition of non-circumferential swing, and ensures the authenticity and accuracy of the test effect.

The utility model relates to the field of vortex oscillators, in particular to an improved vortex oscillator which comprises a vortex oscillator body, a vibration clamping piece is arranged at the top of the vortex oscillator body, a plurality of fixing grooves are formed in the outer wall of the vibration clamping piece, sliding grooves are formed in the two opposite sides of each fixing groove, and sliding rods are arranged in the sliding grooves. A spring is arranged between the sliding rod and the sliding groove, a clamping plate is arranged at the opposite end of the sliding rod, and the clamping plate is in an arc shape. A reagent tube to be tested is placed between the two clamping plates in the fixing groove, the clamping plates are opened by the outer wall of the reagent tube, the sliding rod is pushed under the action of the spring to clamp the reagent tube, and then oscillation is carried out; through the cooperation of the clamping plates, the sliding rods and the springs, the reagent tubes with different calibers can be subjected to oscillation testing, and the arc-shaped clamping plates can better clamp the reagent tubes, so that the reagent tubes do not need to be held manually, and different clamping pieces do not need to be replaced.

The utility model relates to the technical field of automobile accessory detection, disclose gear shift fork oscillation test frock, including shift fork foot, flat plate and shift fork foot support, one end of shift fork foot is equipped with the crash component, the outside of shift fork foot is equipped with fixed component, the crash component includes recessed groove, recessed groove fixed connection one end at shift fork foot, the outside fixed connection of shift fork foot support has convex groove, the inside setting of convex groove is at recessed groove, fixed component includes piston connection, piston connection fixed connection one end at shift fork foot, the inside setting of piston connection has connecting rod. In the utility model, gear shift fork oscillation test frock, simulate the durability test of gearbox actual gear shifting condition, after the appearance inspection and the analysis result of cutting inspection weld after the test, prevent batch welding to be bad to flow out, prevent the automobile gear shifting failure from being recalled due to the welding problem.

This invention provides a voltage-excited method, apparatus, and system for testing the oscillation of wind turbine generators. The voltage-excited method includes: controlling a power converter in a grid-connected testing device to generate a voltage excitation signal to the wind turbine generator; acquiring generator speed vectors within the disturbance frequency range of the wind turbine generator; determining speed deviation indices at each disturbance frequency based on the generator speed vectors at each disturbance frequency; and determining the target oscillation mode frequency of the wind turbine generator based on comparisons between the speed deviation indices at each disturbance frequency and preset thresholds, and comparisons between the speed deviation indices at the corresponding previous disturbance frequency and preset thresholds. This invention can quickly and effectively identify the oscillation modes of wind turbine generators, significantly improving testing efficiency and reducing testing costs.