297results about How to "The test data is reliable" patented technology

The invention provides a multifunctional vacuum friction and wear testing machine, which not only can simulate special environmental atmospheres such as vacuum, radiation and corrosion, but also can conduct tribology tests in a relatively wide speed and load range by using various contact manners (ball-disc and pin-disc). The multifunctional vacuum friction and wear testing machine mainly comprises a vacuum system, a friction and wear system, a power transmission system, a control system, and the like, wherein the friction and wear system comprises a lever structure (22) used for fixing a test sample fixture (20) and capable of freely rotating in a horizontal direction and a vertical direction; the lever structure (22) comprises a cantilever beam (18) and a vertical arm (23) which are arranged in a perpendicular manner; the cantilever beam (18) is connected with the vertical arm (23) through a two degree of freedom bearing structure (17); positions of the cantilever beam (18) and the vertical arm (23) can be adjusted in the horizontal direction and the vertical direction through the control of a manipulator (15) and a hand wheel structure (13), so that the test sample fixture (20) can accurately move within two degrees of freedom; and a temperature sensor (2) and a pressure sensor (3) are mounted on the test sample fixture (20), so as to detect/monitor friction coefficients and temperature variations during the tribology tests.

The invention discloses an LTE technology based vehicle-road communication testing platform and a testing method. The platform comprises an eNodeB base station, an LTE core network, an application server cluster, a network management server, vehicle-mounted testing units and a road field testing lane, wherein the LTE core network, the application server cluster and the network management server are connected mutually; a convergence exchanger is connected with the eNodeB base station; the whole road field testing lane is covered with wireless signals of the eNodeB base station; high-definition cameras are mounted on the road field testing lane and connected with a video monitor server; and the vehicle-mounted testing units exchange information with the eNodeB base station. According to the testing platform and the testing method, the 4th generation mobile communication technology LTE is introduced into an ITS (intelligent transportation system) vehicle-road communication system, the vehicle-road communication testing platform and the testing method for the true environment are provided and used for performing quantitative evaluation on kernel parameters in the vehicle-road information interaction process, and a brand new solution and a verification platform are provided for vehicle-road communication application of vehicle remote monitoring, traffic information publish, wideband data transmission between a vehicle and a road and the like.

The invention pertains to airplane fatigue and damage-tolerance testing technologies, and relates to a damage-tolerance testing method for the whole wing spar of an airplane. The method comprises the steps of: (I) choosing a part with large load from the whole wing spar for serving as a testing part examining segment, (II) producing two same testing parts according to the examining segment, (III) reserving an interval of 20 to 30mm between the two back-to-back testing parts which are respectively provided with a coating in the upper part and the lower part (the coating is connected with an upper spar edge strip and a lower spar edge strip to form a case segment), (IV) fixing the root of the testing case segment completing assembly on a load-bearing wall, (V) exerting concentrated load at one end of the testing parts to simulate the bending moment of the spar at the testing segment and the shearing force of a web, without considering the influence of the shearing flow of the coating and (VI) using a finite element method to conduct damage tolerance analysis on the testing parts and comparing testing results. The method solves the difficulty that the crack expansion and remaining strength of the present airplane whole wing spar structure lack theoretical evidence; and the design of the testing parts adopts a method of simultaneously conducting tests to the two back-to-back testing parts, thereby eliminating the distortion of a single spar.

The invention provides a sensing finger pressure tester of an outdoor high voltage isolator. A flexible diaphragm pressure sensor, a moving contact simulating adjustor and a measuring display form an integral device. The moving contact simulating adjustor comprises a handle, a tubular handle body, an on position indicating slider, a moving contact width adjusting screw nut, a sliding block, a sliding chute, a limit baffle, etc. The invention has the advantages of small volume, light weight, reasonable structure, and reliable test data. The invention can be used as the sensing finger pressure tester of the high voltage isolator arranged newly or inspected and pretested. The invention mainly aims at the high voltage isolators with different voltage classes and rated current specifications, such as GW4, GW5, GW7, GW31, GW25, GW27, GW33, GW43, GW26, etc., is in particular suitable for using during the on-site work high above the ground.

The invention provides a self-closed calibration method for eliminating short-term burst interference signals, and aims to provide a method capable of effectively eliminating influences of short-term burst interference, ensuring accurate and reliable amplitude and phase test data and improving the calibration success rate of a phased array antenna in a short-term burst interference environment. The self-closed calibration method is implemented according to technical scheme that a calibration receiver performs down-conversion on signals returned by a tested antenna, sends generated intermediate-frequency signals to a calibration signal processing unit, calculates an amplitude value and a signal-to-noise ratio (SNR) of the tested signals according to in-phase component and quadrature component sampling values acquired by sampling and digital quadrature demodulation, compares the SNR with a preset judgment threshold SNRth to judge whether the signal-to-noise ratio of the tested signals meets requirements or not, and obtains amplitude and phase test data until required amplitude and phase tests of N states are completed; and then amplitude and phase distribution of the feed is calculated according to the obtained amplitude and phase test data, evaluation is performed by applying a calibration result, and whether a convergence requirement is met or not is judged.

The invention relates to a sectional wave load testing model for an air cushion vehicle. The model comprises an air cushion vehicle model body, and is characterized in that the air cushion vehicle model body has a sectional structure, and consists of six modules, wherein a gap is formed between every two adjacent modules; the modules are fixedly connected through measurement beams.

The invention discloses a liquid flow metering device which is composed of a water storage circulating device, a surge tank, a flow adjusting device, a weighing device and the like.The water storage circulating device comprises a water storage pond with a water storage pond water inlet pipe and a water storage pond water outlet pipe, a variable frequency motor and a water suction pump.The flow adjusting device comprises a first main pipeline, a second main pipeline, a third main pipeline, a fourth main pipeline, a first branch pipeline and a second branch pipeline.The weighing device comprises a first large container, a low-self-weight weighing device, a second large container, a low-self-weight weighing device, a third large container and a low-self-weight weighing device which are sequentially connected in series.The whole device is designed and manufactured strictly according to relevant national verification regulations, design requirements and manufacturing standards.The accuracy and reliability of quantity value transfer can be guaranteed better, and complex labor and shutdown waiting in the process of dismounting and mounting during standard meter verification are omitted.

The invention discloses a radio frequency identification system test board. The test board comprises an upper computer, a PLC controller, a conveyer, an antenna revolving table and an antenna rotary table, wherein the conveyer is used for transmitting a radio frequency tag; the antenna revolving table is used for adjusting the directions of a transmitting antenna and a receiving antenna; the conveyor is driven by a variable frequency motor; the antenna revolving table is arranged above a conveyer belt of the conveyor; a brake motor is connected with a rotary table transverse shaft through a two-stage speed reducer and is used for adjusting the pitch angle of the antenna; a servo motor is in transmission connection with the antenna rotary table through a driving mechanism which is used for driving a first antenna turntable and a second turntable to rotate synchronously and reversely, and is used for adjusting the azimuth angles of the transmitting antenna and the receiving antenna; the transmitting antenna and the receiving antenna are connected with the upper computer through a measuring device; and control ends of the variable frequency motor, the brake motor and the servo motor are connected with the output end of the PLC controller. The test board can simulate a practical application scene to perform a comprehensive test on the radio frequency tag and has high automatic degree.

The invention discloses an unmanned vehicle traffic light automatic perception capability test system and test method. A test management center, a test road, roadside test equipment and traffic lightsare set; a vehicle-mounted intelligent terminal is installed on a test vehicle; a roadside traffic signal control device controls the operation of traffic signals in real time, and sends the currenttraffic light signal status to the vehicle and the test management center in the test scene; and reference lines sensing starting and ending of the test are set in the test scene area; the roadside test equipment or the test management center are utilized to compare the actual states of the traffic lights and the traffic signal perception result data to evaluate the automatic sensing ability of the unmanned traffic lights, so that the real traffic environment can be simulated. The test results can more accurately evaluate the automatic sensing ability of unmanned vehicle traffic lights. The test system and method are safer than actual road tests. Compared with virtual simulation test, the environment in the invention is closer to the actual traffic environment, and the test data is more realistic and reliable.

The invention belongs to the technical field of monitoring of tunnels, and specifically relates to a surrounding rock pressure-frost heaving force monitoring system for a tunnel in a cold region and a mounting structure of the monitoring system. The system comprises a plurality of sensor modules which are arranged on a testing section to measure real-time data, a plurality of data acquiring modules which are arranged on each testing section to acquire the data of the sensor modules, data processing module for collecting and processing the data acquired by the data acquiring modules, a central control module for controlling the working states of the data acquiring modules and the data processing modules, and a data display module for displaying the data acquired by the data acquiring modules; the data acquiring modules are respectively connected with the sensor modules and the data processing module; the data processing module is respectively connected with the central control module and the data display module. The monitoring system has the advantages that the gradations are distinct, all testing sections are connected in parallel for working, and the damage of some testing section does not influence the work on other testing sections, so that the practicability is high; in addition, the testing data are complete and reliable, the data processing is simple and clear, the data continuity is high, and therefore, the analysis can be conveniently carried out.

The invention relates to a performance and efficacy testing platform of a heat exchanger. The platform comprises a heat source part, a vapor source part, first and second mixers, an air source part, a shell-and-tube heat exchanger, first and second separators, a shell-and-tube type double-tube heat exchanger testing assembly, a condensation heat exchanger, a boiling heat exchanger, first and second water cooling devices and a steam condenser. The platform can test heat transfer properties and fluid flowing resistances of the shell-and-tube type heat exchanger, the double-tube heat exchangers, the condensation heat exchanger and the boiling heat exchanger respectively, does not occupy much space, reduces the production cost, satisfies practical measurement requirements and has good application and development prospects, and test data is stable and reliable.

The invention discloses a complicated stable sound field sound pressure testing device relating to an acoustic testing device. The testing device comprises a driving mechanism I used for driving the whole device to move, an acoustic probe array elevating and rotating driving mechanism II, an acoustic probe array telescopic driving mechanism III, an acoustic probe array IV, an acoustic probe array testing channel correcting driving mechanism V, a sound source reference position measuring column VI, and a point sound source standard sound wave generator VII. The complicated stable sound field sound pressure testing device is advantageous in that the testing device is small and light; the installation and the debugging of the testing device are relatively simple; during the measurement, the labor force and the material force can be greatly reduced, and the labor intensity can be reduced, and in addition, the precision of the measurement data can be increased, and at the same time, the testing device is especially suitable for the on-site operation of the large-scale complicated stable sound field.

The invention discloses an explosion impulse testing device, system and method. Explosion impulse parameters are converted into slider speed increments which are easy to measure and can reflect an explosion impulse process, the magnitude of the specific impulse of an explosion wave transmission process after explosion can be effectively measured, the test error is small, the accuracy is high, andreliable data can be provided for shock wave damage effect evaluation.

The invention discloses a shore/beach sediment release simulation experiment device and a shore/beach sediment simulation experiment method. The shore/beach sediment release simulation experiment device comprises a wave generating device, a measuring device and a water level fluctuating device, wherein the water level fluctuating device comprises a slope variable water channel the slope of which can be regulated, and a lifting barrel which is connected with the slope variable water channel by virtue of a water outlet pipe and can be lifted in height; the wave generating device is arranged in the slope variable water channel, and comprises a rotating disc sliding groove formed vertical to the bottom of the slope variable water channel, a rotating disc which is arranged on the rotating disc sliding groove in a sliding manner and can rotate, and a floating body connected with the rotating disc. A mud groove is formed in the slope variable water channel. Water is injected in the lifting barrel and the water level fluctuation time and the fluctuation period in the slope variable water channel and the water level fluctuation are controlled, the rotating disc is rotated to continuously generate wave, so that the bottom permeability of bottom mud in a natural state and the fluctuation characteristic close to the natural water level can be restored, and the problem of experiment research of bottom mud pollution release under a hydrodynamic action that a lake shore is periodically flooded and repeatedly scoured by water can be simulated.

The invention discloses a test platform for constant load control performance of an electric winch of a helicopter. The test platform comprises a test platform frame, a helicopter electric winch, a working bedplate and a reel, wherein a tension detection pulley block and a tension sensor connected with the tension detection pulley block are arranged on the test platform frame; the test platform further comprises a tension controller; a signal input end of the tension controller is connected with a signal output end of the tension sensor; the two ends of the reel are respectively connected with two bearing bases on the working bedplate; an output shaft at one end of the reel is successively connected with a magnetic powder clutch, a coupler, a speed reducer and a servo motor; the magnetic powder clutch, the coupler, the speed reducer and the servo motor are all arranged on the working bedplate; a wire rope passes through the electric winch of the helicopter and the tension detection pulley block in turn and is connected into the reel. The test platform provided by the invention has the characteristics of constant load, high loading control precision, safe and reliable structure, easiness in detaching and maintaining and capability of meeting the test demand on the loading performance of the wire rope of the electric winch of the helicopter, and can be widely applied to the field of electric winch test.

The invention discloses an RF electromagnetic field and radio immunity test system of an electric energy meter. The system comprises a tester body, a signal generator, an EMI receiver, a rotary table and antenna tower controller and an electric energy meter calibrating device, wherein the tester body is connected with the rotary table and antenna tower controller via a router, the electric energy meter calibrating device is connected to the tested electric energy meter via a filter, the rotary table and antenna tower controller is connected with a rotary table and an antenna tower, the EMI receiver is connected with an RF switch and a stop band filter, the RF switch and the stop band filter are connected with the router and the antenna simultaneously, the signal generator is connected with the RF switch, and the RF switch is connected with a power amplifier. Due to utilization of the network synchronization technology, immunity test of the RF electromagnetic field, synchronous recording of errors of the electric energy meter, multifunctional electromagnetic field test and RF interference suppression test are automatically integrated, monitoring data is collected and analyzed in real time, the operation and detection cost and the detection time are greatly reduced, and the accuracy of test data is effectively ensured.

The invention relates to a full coupled test probe for dry hole sound wave, and belongs to the field of nondestructive examination equipment manufacture of engineering. The full coupled test probe for the dry hole sound wave comprises a sound wave probe and a pressurizing water bag, wherein the top at one sealed end of the pressurizing water bag is provided with a vent hole of which the diameter is not more than 1 millimeter. An end part of the sound wave probe is provided with a connecting device; and the pressurizing water bag is sleeved outside the sound wave probe. Air in the pressurizing water bag can be directed exhausted by the vent hole; and the pressurizing water bag is filled with water at the same time to ensure internal coupling between the sound wave probe and the pressurizing water bag. The vent hole at the top of the pressurizing water bag has double uses, namely, after the air is exhausted, the vent hole continuously keeps continuous small amount of spilling water, so as to solve coupling (external coupling) between the outer wall of the pressurizing water bag and the wall of the hole. The test probe realizes full coupling of the sound wave prove, the pressurizing water bag and the wall of the hole so that the tested data are stable and reliable, and meets the requirement of rapid detection.

The invention belongs to the field of correlation techniques of flexible electronics and discloses an anti-tensile and anti-flexing performance test system for flexible electronics. The system comprises a control module, a data acquisition module and a testing module, wherein the testing module comprises two fixed mandrel units and two bent mandrel units in a sealing manner, and each fixed mandrel unit has fixing and stretching functions on the flexible electronics, has the freedom degree in the X direction and can be provided with a tension sensor; each bent mandrel unit can realize radius bending of a given mandrel, has freedom degrees in X and Y directions and can be provided with a pressure sensor and a CCD camera. Through combination of the four mandrel units, tests of constant tension, bending pressure, testing temperatures as well as flexing resistance of complicated curved surfaces such as C type, S type, G type and the like with adjustable bending radii, bending speeds and bending angles can be realized, anti-tensile performance test can be realized, and the defects that an existing device can only perform simple C type test and test data are not accurate due to non-quantitative test conditions are effectively overcome.