137results about How to "The test effect is accurate" patented technology

The invention provides a speed change pressure flow field control method applicable to an intermittent transonic speed wind tunnel, and relates to the technical field of aerospace industry wind tunnel tests. The speed change pressure flow field control method applicable to the intermittent transonic speed wind tunnel solves the problem that a traditional flow field control method can not meet the requirements of flutter tests. The technical scheme includes: enabling total pressure and main ejector pressure to rise to first stage set value in a given rate after a wind tunnel starts ramming; controlling a mach number to reach set target value in a flow field regulating procedure; controlling a main pressure regulating valve and a main air discharge valve so as to enable the total pressure of the wind tunnel and the main ejector pressure to reach respective target value in a change total pressure regulating procedure; and controlling the current main ejector pressure to gradually drop to set shutdown main ejector pressure and controlling the current wind tunnel total pressure to gradually drop to set wind tunnel total pressure value when the wind tunnel is shut down. The speed change pressure flow field control method applicable to the intermittent transonic speed wind tunnel can meet the requirements of the flutter tests for intermittent transonic speed wind tunnel flow field control, has rapid, accurate and reliable test effects, and furthermore is high in total pressure control and mach number control accuracy.

The invention relates to multi-direction stiffness test device and method for fabric. The device disclosed by the invention comprises a box-shaped fabric sunken table, a pressure exerting component and an image taking device. The method disclosed by the invention comprises the following steps: ironing to-be-tested fabric and cutting into specified size; putting a sample at the upper end of the sunken table; adjusting and fixing the shooting angle and focus distance of a digital camera at the periphery of the sunken table and above the sunken table; lightly putting a weight at the position of the circle center of the sample at constant speed; shooting the sunken fabric from the upper part by using a digital camera of which the focus distance and the angle are adjusted after the weight is placed for schedule time; respectively shooting the sunken and deformed fabric from different angles by using the digital cameras at the periphery of the sunken table; leading the pictures of the shot fabric in five directions into auto CAD software; inquiring the image distance and the area function, and carrying out extraction of the stiffness index. The index reflecting the stiffness of the fabric is obtained by image treatment, and the method and the device have the advantages of being simple and convenient, accurate in test result and the like.

The invention provides a stimulation information compilation method for testing a cognitive competence value. The stimulation information compilation method at least comprises: selecting at least one stimulation information with test efficiency of the sample personnel conforming to the normal distribution; setting at least one reasonable sequence according to the efficiency and cognition dimension of the at least one stimulation information so as to be used for the test personnel to select according to individual favorite; dynamically compiling lie detection stimulation information and / or reverse stimulation information so as to test the reliability of the test personnel according to the physiological information and / or psychological state of the test personnel; comparing a test score of the test personnel and the score of the effective sample personnel on the normal distribution model so as to confirm the distribution situation of each cognition dimension of the test personnel. The stimulation information with high efficiency is reasonably selected according to the normal distribution model, and the lie detection stimulation information and guide stimulation information are dynamically compiled according to the variation of the physiological state and psychological state of the test personnel, so that real cognitive competence value data of the test personnel can be acquired.

The invention relates to a fiber type vibration sensing and measuring system, especially to a notch type fiber vibration sensing system based on a cantilever structure. The system mainly comprises a support structure, an elastic cantilever beam, a test mass block, a fixed fiber beam, a connecting fiber, a notch type grating, a variable optical attenuator, a balancing photo detector, an electronic spectrum analyzer and a polarization controller. The test mass block is applied to the tail end of the cantilever beam, and can detect the vibration amplitude and acceleration signals. A test module is driven in an optical driving manner, an acceleration generates relative displacement change of the cantilever beam, and the relative displacement change is converted to change of optical signals. According to the intention, the optical signal change is detected and converted to the acceleration and vibration amplitude of a measuring carrier, the structure is simple, the technical cost is low, and the system is not limited by a vibration direction of an object, and has practical application values.

The invention discloses a hypersonic aircraft thermal protection material ground simulation test system and method. In a ground test process, a laser is used for heating a test piece, simulated airflow is loaded on the surface of the test piece, and an external force is loaded on the test piece through an electronic universal testing machine. Therefore, the material mechanical properties of the hypersonic aircraft thermal protection material in a real environment are simulated and evaluated, and finally, the thermal protection properties of the hypersonic aircraft material and the structure are inspected. The method has the characteristics of simple equipment, low test cost, high heating rate, high test temperature and wide application range.

The invention discloses a time reference redundancy signal intelligent testing system and method of a time synchronization device. The time reference redundancy signal intelligent testing system comprises a GPS / Beidou satellite antenna receiver, a manger for operating a testing and analyzing management program, a time frequency standard source connected with the manager through a communication link for realizing program control, and a time scale impulse testing device, and an IRIG-B (Inter-Range Instrumentation Group) code testing device. The time reference redundancy signal intelligent testing system is characterized by being provided with an intelligent time frequency signal switcher, the program control of the manager is realized through a testing and analyzing management program operating in the manager, program control switching is carried out by the intelligent time frequency signal switcher, and the intelligent time frequency signal switcher is used for testing the time reference redundancy signal switching function. Under the condition of no need of manual intervention, the function and the performance of outside reference signal switching of the time synchronization device are simply and effectively intelligently tested, the complex service function and the performance testing intelligent level of the time synchronization device are reliably improved, the performance is more accurately tested, the testing efficiency is higher, and the testing time is greatly shortened.

The invention discloses an electric energy meter seal performance testing device, which comprises a mother board replacement component 1, a fixed mother board 2, a mother board transplanting component 3 and a testing component 4. The improvement of the electric energy meter seal performance testing device is characterized in that the testing device is arranged in a stereoscopic framework formed by columns which are vertically placed and lining plates which are connected with the columns and are horizontally placed; a bottom board of the mother board transplanting component 3 is arranged on a lining plate at the middle part; supporting columns are arranged at the bottom part of the mother board transplanting component 3; the fixed mother board 2 is arranged above the mother board transplanting component 3 and is connected through a linear guide rail 24 which simultaneously penetrates through the mother board replacement component 1; the testing component 4 is arranged in parallel behind the mother board transplanting component 3. The electric energy meter seal performance testing device provided by the invention has the advantages of simple structure, convenience in installation and low manufacturing cost, and can be widely applied to scientific research institutes and industrial detection departs.

An evaluating method and measuring device for the uniformity of spray holes of an oil sprayer involve the evaluating method for the uniformity of the spray holes of the oil sprayer ("evaluating method" for short) and the measuring device for the uniformity of the spray holes of the oil sprayer ("measuring device" for short). An inlet air heating and pressurizing system and an exhaust air cooling system are connected to two side faces of a high temperature and high pressure device body of the measuring device correspondingly, a computer is connected with a synchronous control system which controls an oil supply system and a high speed camera, a 45-degree plane reflective mirror is located under the high temperature and high pressure device body, and the center of the 45-degree plane reflective mirror and the central axis of the high speed camera are located in the same horizontal plane. The evaluating method includes the steps of initializing the measuring device and the synchronous control system, setting various parameters, triggering the high speed camera and the oil sprayer, obtaining and processing images, and then obtaining test data of working consistency and durability of the spray holes. The evaluating method and measuring device for the uniformity of the spray holes of the oil sprayer can accurately simulate practical work of an engine, obtain accurate measurement data and are high in applicability.

The invention relates to a module for separating a different-mode signal and a common-mode signal. The module comprises a first transmission-line transformer. The two ends of a first transmission-line transformer primary coil are connected with the firing line output terminal and the null line output terminal of a line impedance stabilizing network respectively, the first transmission-line transformer primary coil is connected between the firing line output terminal and the null line output terminal, a center tap is arranged in the middle of the primary coil, the center tap is grounded through a first resistor, the center cap is connected with a common-mode signal output terminal, the firing line output terminal is further connected with one end of the input end of a second transmission-line transformer, the corresponding output end of the second transmission-line transformer is connected with a different-mode signal output terminal through a second resistor, the null line output terminal is further connected with the other end of the input end of the second transmission-line transformer, and the corresponding output end the second transmission-line transformer is grounded. The module has the advantages of being simple in circuit structure, good in common-mode rejection ratio and different-mode rejection ratio, precise in test effect, small in size, light in weight and the like.

The invention discloses a speed-measuring function test platform for a vehicle-mounted system for measuring the speed based on a speed sensor. A test object is the speed-measuring function of the vehicle-mounted system for measuring the speed based on the speed sensor; speed sensor or acceleration sensor information which is calculated through the set model is input into the vehicle-mounted system; and testing of the speed-measuring algorithm function of the vehicle-mounted system can be achieved for testing personnel on a software view. The testing platform is capable of acquiring acceleration information which is close to that of a real vehicle as much as possible by vehicle stress analysis without complicated speed-measuring filtering and slipping judgment algorithms, and simulating the vehicle slipping scene through dynamic slip rate control, so that the input signal of the vehicle-mounted system is relatively close to that of the real vehicle, and a relatively accurate test effect is achieved.

The invention discloses an impact test device, and relates to the technical field of impact tests. The impact test device comprises an accommodation box, a bracket, a machine frame, a release component and a baffle plate component, wherein the bracket is arranged at the bottom of the accommodation box, and is used for supporting a piece to be tested; the machine frame is perpendicularly fixed above the accommodation box; the release component is arranged on the machine frame, and is used for fixing and releasing an impact block, and the piece to be tested can be hit when the impact blocks falls; the baffle plate component is arranged in the accommodation box, and comprises two groups of movable plates capable of rotating and closing to prevent the piece to be tested from being hit again bythe rebounding impact block. According to the impact test device, the problem of secondary impact of an impact test is solved, and the impact test device is accurate in impact point and high in testefficiency, and has an accurate test effect.

The invention discloses an underwater robot propeller thrust testing device which comprises a motor holder, a linear guide rail in horizontal arrangement and a supporting frame for supporting the linear guide rail. A first slider is arranged on the linear guide rail in a matched manner, and the motor holder is connected with the first slider through a connection frame and suspended above the linear guide rail through the connection frame; the testing device further comprises a spring arranged between the first slider and the supporting frame and used for resisting movement of the motor holder,and a strain recording device for recording deformation of the spring is arranged on the supporting frame. A force is directly applied to the spring through displacement of the slider, so that transmission process is simplified; motor thrust of an underwater robot can be tested through deformation of the spring, impact of various factors probably existing in the process is eliminated, and the testing device is more accurate in testing effect and simpler in principle and can be applied in various environments with instable water flow.

The invention discloses a comprehensive intelligent time frequency testing system and a testing method. The system comprises a GPS (global positioning system) / Big Dipper antenna receiver, a management machine, a time frequency standard source and time standard pulse testing equipment, standard frequency testing equipment, IRIG (inter range instrumentation group) -B timing code testing equipment, a NTP / SNTP (network time protocol / simple network time protocol) message testing equipment and a PTP (precision time synchronization protocol) message testing equipment. The management machine is provided with a database and is used for running a testing and analyzing management program. The time frequency standard source is used for connecting the management machine through a communication link to realize program control. An intelligent time frequency signal switcher is provided, and the program control of the management machine is realized through the testing and analyzing management program; moreover, the switch of the program control is carried out by the intelligent time frequency signal switcher for carrying out a comprehensive intelligent time frequency test. The intelligent comprehensive test to the tested time synchronous equipment can be effectively and easily carried out with no need of manual intervention, so that the intelligentization, the standardization and the systematization levels of the tests of the complicated service function and performace of the time synchronous equipment are practically improved, the test performance is more correct, the testing efficiency is higher, and the testing time is greatly shortened.

The invention relates to the technical field of testing, and provides a CAN bus test system and a CAN bus test method based on a UDS. An ECU to be tested is connected to PCAN hardware through a CAN bus, the ECU to be tested is connected to an external testing device through the PCAN hardware in a USB mode, the ECU to be tested is started, and the working performance of the ECU to be tested is tested through the external testing device. In this way, the use of high-cost German Vector software in cooperation with a canoe hardware test system can be avoided, the test cost is effectively reduced,the test effect is accurate, the success rate is high, the test system is simple to erect, the operation is convenient and easy to understand, meanwhile, the same test function as that of the German Vector software matched canoe hardware test system can be realized, and the working performance of a product is ensured.

The invention relates to the field of friction test devices, and concretely relates to a friction wear test machine. The friction wear test machine comprises a frame, and a rotating shaft and a lifting shaft which are coaxially arranged on the frame along a vertical direction, the rotating shaft is driven by a rotation driving device arranged on the frame to rotate, the lower end of the rotating shaft is connected with a cutter sample clamp for fixing a cutter sample through a movable interface, the lifting shaft is driven by a lifting driving device arranged on the frame to lift, an elastic connecting piece is arranged between the lifting shaft and the lifting driving device, and a substrate sample clamp for fixing a substrate sample is arranged at the upper end of the lifting shaft. Thefriction wear test machine can accurately control a pressure between the cutter sample and the substrate sample and overcome bounce of the cutter sample and the substrate sample, caused by poor processing precision, and can easily carry out friction wear test in multiple forms.

The invention discloses a method for dynamically testing embedded system software which comprises a tested program to be dynamically tested. The method comprises the following steps: setting a test module for dynamically testing the tested program in the tested program; and calling the test module in the running process of the tested program so as to implement the dynamic test on the tested program. The method implements automatic dynamic test on the software without a special hardware test platform by embedding the test module into the tested program and automatically calling the test module to dynamically test the tested program in the running process of the tested program.

The invention discloses a performance test system and test method for an explosion suppression and explosion resistance mining device. The performance test system is characterized by comprising a test steel pipe (6) capable of being pumped to negative pressure, and a detection and ignition unit and a test and gas supply unit (13) are arranged on the pipe wall of the test steel pipe (6); an explosion suppression and explosion resistance device is fixed at the middle part of the test steel pipe (6); a sensor group (5) used for triggering the explosion suppression and explosion resistance device is mounted in a pipeline between the detection and ignition unit and the explosion suppression and explosion resistance device, and a plurality of flame sensors (14) are mounted on the pipe wall between the test and gas supply unit (13) and the explosion suppression and explosion resistance device; a controller which is connected with the detection and ignition unit, the test and gas supply unit (13), the sensor group (5) and the flame sensors (14) and controls the components to work is arranged. The performance test system can simulate the real negative-pressure environment in an extraction pipeline, so that the test concentration is arbitrarily set, and the performance test system is strong in universality.

The invention relates to a Raman spectrum probe extending device for detecting a deeper solid sample. The Raman spectrum probe extending device comprises an inner tube, a reflecting mirror, a window protective casing, a taper and a focusing lens, wherein a window is formed in the side wall of the inner tube; the reflecting mirror is located in the inner tube; the window protective casing sleeves the inner tube; the taper is arranged at the front end of the inner tube; the focusing lens is arranged at the rear end of the inner tube. Compared with the prior art, the Raman spectrum probe extending device disclosed by the invention has the advantages that convenience in operation is realized, i.e., the probe extending device can be directly inserted into the middle part of a sample bag to acquire Raman spectrum information of the sample; the structure is simple; an optical system consists of the quartz glass window, the reflecting mirror and the focusing lens; a spectrum signal of the sample can be directly reflected into a detector; measurement efficiency is high; after the probe extending device is connected with a Raman spectrum system, the whole spectrum acquisition and matching identification process can be finished in a short time.

The invention relates to the technical field of mechanical property test of metallic materials, specifically to a sample, a fixture and a method for a metallic material single-axis creep resistance test. The main points of the technical scheme are as follows: the sample comprises a test part and clamped parts which are formed integrally with the two ends of the test part; the connections between the test part and the clamped parts are surrounded by bosses; the test part, the clamped parts and the bosses coincide in central axes, of which diameters of cross sections are gradually increased; andthreads in threaded connections with a test fixture are formed on the clamped parts. The fixture fixes the clamped parts. When the tensile creep resistance of the sample is tested, the test result ismore accurate because the threaded connection and fixation help clamp better, and make the possibility to slide small and when the pressure creep resistance of the sample is tested, the threaded connections also play a great role in fixing. The bosses make the clamping and connections stabler, and also play a role in centre alignments, which also results in a more accurate test result. The invention realizes that the pressure creep resistance and the tensile creep resistance of the sample are sequentially tested by a same instrument and the tests are highly efficient.

The invention provides a side slope three-dimensional bottom friction testing device and belongs to a testing device for simulating side slope damages. The side slope three-dimensional bottom friction testing device is composed of a side slope model, a friction device, a horizontal loading device and a basic framework, wherein the side slope model can be an entity with a plurality of steps and is packed in a rectangular box body; the friction device is arranged at the bottom of the side slope model; and the horizontal loading device is arranged at the back part of the side slope model. By utilizing the friction device at the bottom and the loading device at the back part, a shear force generated when a side slope is damaged is simulated, so that a condition that the three-dimensional side slope model is damaged under natural or manual conditions is simulated. The testing device provided by the invention is simple in structure and low in manufacture cost, can be used for clearly observing a damaging manner of the side slope, and also can be used for relatively accurately determining damage data and effect of the simulated side slope model.

The invention discloses a yarn twist contraction performance test method and device. The device comprises a base and a support. A stepping motor is installed on the support. A pneumatic clamp is connected to the lower end of the stepping motor. One end of yarn is connected to the pneumatic clamp and the other end of the yarn is connected to a tension controller. One end of the yarn is fixed through the pneumatic clamp, the other end of the yarn is not fixed and a yarn tension force is controlled only through a yarn controller so that the problem that the traditional method fixes two ends of the yarn so that yarn strength is reduced and a test result is furthermore is solved. The method and device have operation simpleness and convenience and produce an accurate test result.

The invention discloses a simulated test platform for measuring dynamic balance data. The simulated test platform comprises a motor frame. A motor is fixedly suspended at the upper end of the motor frame. The output end of the motor penetrates the upper end surface of the motor frame and is successively connected with a rigid coupling and a rotating shaft. The upper end surface of the motor frame is provided with a housing bracket which is arranged fixedly. A housing is fixed on the upper end of the housing bracket. The housing is internally provided with a bearing transmission mechanism which is connected with the rotating shaft. The upper end of the bearing transmission mechanism is connected with a simulated turntable. A magnetic rotating speed detecting rod is fixed on the side surface of the upper part. The housing is provided with a magnetic rotating speed sensor which corresponds with the magnetic rotating speed detecting rod. The upper end surface of the simulated turntable is provided with a counterweight mounting hole. The motor frame is also provided with an acceleration sensor. The simulated test platform has advantages of exquisite design and simple structure. The simulated test platform can well simulate the actual state of a tested system and supplies data support for a dynamic balancing algorithm.

The invention belongs to the technical field of soil analysis measurement and relates to a method for measuring whole vanadium in soil. The method comprises the steps of weighting and placing a soil sample into a conical bottle, adding aqua regia, heating the soil sample dry on an electric furnace with a ventilation cabinet, taking down the soil sample, cooling the soil sample, adding perchloric acid, heating again to emitting white smoke, removing nitric acid after the soil sample is in ropiness, taking down the soil sample to cool, adding diluted hydrochloric acid to dissolve, filtering with distilled water to be arranged in a measuring flask in a constant volume mode, shaking up, standing, obtaining vanadium-contained soil solution to be measured, placing the vanadium-contained soil solution into a colorimetric tube, sequentially adding a color developing agent, hydrogen dioxide solution and hydrochloric acid solution, then sequentially adding a screening agent to stand and shake up to be placed, measuring absorbance of colored complex at the 575nm wave length position with a cuvette, recording measurement results, analyzing and calculating. The method is simple in technical process, reliable in measurement principle, accurate in measurement effect and data, friendly in measurement environment, and widely suitable for measuring various kinds of vanadium-contained soil.

The invention relates to the field of friction test equipment, in particular to a pin disk friction tester which comprises a test bench. A friction disk and a friction pin for friction test are arranged on a table of the test bench, the friction disk is driven to rotate by a driving device arranged in the test bench, and the friction pin is connected onto an adjusting device which is fixed onto the test bench and used for adjusting the pressure and positions of the friction pin and the friction disk. The pressure between the friction disk and the friction pin can be conveniently adjusted, andbounce of the friction pin on the friction disk due to process precision can be overcome.

The invention relates to a modular servo drive unit comprehensive test platform based on bus control. The platform comprises a plurality of servo drive unit components, each servo drive unit componentin the plurality of servo drive unit components at least comprising a servo drive unit; a controller used for controlling the plurality of servo driving units corresponding to the plurality of servodriving unit assemblies; wherein the plurality of servo driving units are connected with the controller through an Ethernet automatic control EtherCAT bus. According to the invention, through an EtherCAT bus control mode, a group of multiple servo driving units are connected in series to carry out multi-machine test of a bus mode, so that a more accurate, faster and more controllable test effect is achieved, the consumption of test time is reduced, and the labor cost is reduced.

The invention discloses a method for detecting the water injection effect of coal mine impact coal bed, which detects the water injection effect of a coal mine impact coal bed through analyzing an electromagnetic radiation image which is generated by coal bed samples in the process of a compressed destructive test. The invention has the advantages of simple and scientific method and accurate test effect, which is not influenced by physical factors, and is particularly suitable for the security detection work of large-scale coal mines.

The invention relates to a tester for rapidly testing a heat-insulating property of a fabric, and belongs to the technical field of textile measurement. The tester mainly comprises two heating plates,a temperature acquisition and control module and an air flow generation module, and the two heating plates are placed on the same horizontal plane. The tester for rapidly testing the heat-insulatingproperty of the fabric is reasonable in structure and convenient to operate and use. By the tester for rapidly testing the heat-insulation property of the fabric, the heat-insulation property of the fabric can be tested rapidly, the heat-insulation index of the fabric can further be tested in an open environment, and the theoretical basis is provided for researching and evaluating heat transfer performance indexes of the fabric.

The invention provides a testing device and a testing method for a reciprocal reflective optical voltage sensing unit. The device comprises a light source, a polarizer, a polarization-maintaining circulator, an optical voltage sensing unit, an analyzer and an optical power tester, and a first port, a second port and a third port are arranged on the polarization-maintaining circulator. The method includes: setting a first testing point, a second testing point and a third testing point in the testing device; respectively performing 0-degree welding to the first testing point and the third testing point; respectively measuring optical power output by the testing device when the second testing point is subjected to 0-degree welding and 90-degree welding through the optical power tester, and testing whether performances of the optical voltage sensing unit are good or not through judging whether optical signals exist or not. By the testing device and the testing method, the performances of the optical voltage sensing unit can be effectively tested through judging whether output signals exist or not. The testing device has the advantages of simple structure, convenience in operation, accuracy in testing result and the like.

The invention provides a fuel cell water distribution piece testing device and a testing method thereof and relates to the technical field of fuel cells. The device comprises a high-pressure gas source, a pressure regulating valve, a control flow meter, a bubbling humidification tank, a heat exchanger, a circulating water pump, a sprayer, a dew point detector, a water distribution piece, a drain valve and a TVP particle size distribution instrument, wherein the high-pressure gas source is connected with the control flow meter, the control flow meter is connected with a gas inlet of the bubbling humidification tank, a gas outlet of the bubbling humidification tank is connected to the water distribution piece, a heat exchanger and a circulating water pump are connected between a circulating inlet and a circulating outlet of the bubbling humidification tank, a dew point detector and a sprayer are sequentially connected between pipelines of a water outlet and a gas outlet of the bubbling humidification tank, a liquid outlet of the water distribution piece is connected with a drain valve, and the gas outlet is connected with a TVP particle size distribution instrument. According to the high-pressure gas source, a running state of the galvanic pile can be simulated, the independent performance test can be carried out on the water distribution piece in the simulated running state of the galvanic pile, the test effect is accurate, efficiency is high, and the cost is low.