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31results about How to "Controllable test conditions" patented technology

Three-directional static and dynamic loading model test platform for deep water foundations of bridges

ActiveCN103510551ASolve the technical problem of vertical loading influenceSmall sizeFoundation testingHorizontal forceTower
The invention discloses a three-directional static and dynamic loading model test platform for deep water foundations of bridges. The three-directional static and dynamic loading model test platform comprises a test foundation trench, a vertical loading system, a horizontal bi-directional loading system and a water level simulating system. The test foundation trench is used for arrangement of foundation soil, water and models. The vertical loading system used for applying vertical static and dynamic action on the models is installed at the top of the test foundation trench, the horizontal bi-directional loading system used for applying two or more horizontal static and dynamic actions on each model is installed on the upper portion of the inner side wall of the test foundation trench, and the water level simulating system used for water feeding and draining and test water level control in the test foundation trench is installed on the bottom and the outer side of the outer side wall of the test foundation trench. Test and research on the models of bridge deep water foundations such grouped piles, sink shafts, caissons and compound foundations and bridge towers (piles) under three-directional static and dynamic actions such as the vertical static and dynamic action and the horizontal bi-directional static and dynamic action can be carried out by the test platform, and the test platform solves problems about simulation of static and dynamic mutual action of the foundation soil-water-bridge deep water foundation-bridge tower (pile) under the combined working conditions of vertical force, horizontal force, bending moment, torque and the like.
Owner:CCCC HIGHWAY BRIDNAT ENG RES CENT

Ship intelligent control system test platform with virtual and real fusion

The invention relates to a ship intelligent control system test platform with virtual and real fusion. The ship intelligent control system test platform with virtual and real fusion comprises a real navigation database, a real-time simulation system for generating a numerical twinning fused traffic scene according to data in the real navigation database, a ship simulation system for simulating a ship in the test scene, and a tested intelligent control system for controlling and simulating the ship according to the data provided by the ship simulation system. The experimental environment constructed by the ship intelligent control system test platform with virtual and real fusion disclosed by the invention comes from real data collection, which ensures the validity of the test; and the based object experimental ship and experimental process are still based on numerical simulation, which reduces the risk and cost of the test; that is, the experimental object ship is based on numerical simulation, and the experimental scene completely comes from the perception fusion of the real world.
Owner:南京智慧水运科技有限公司

Micro-surfacing mixture noise indoor-test method

The invention discloses a micro-surfacing mixture noise indoor-test method which relates to a micro-surfacing mixture noise test method, aiming at solving the problems in the prior art that micro-surfacing road noise is difficulty tested, evaluated and estimated with effectiveness before the construction, and the selection of micro-surfacing mixture gradation is not benefited. The test method mainly comprises the following steps of: 1, selecting a lab; 2, preparing a micro-surfacing mixture test piece; 3, mounting the test piece; 4, selecting and mounting a sound level meter; 5, pretreating the test piece, checking a wear tube before test, replacing the wear tube and then starting the test if the wear tube is severely worn, starting a wet wheel abrader in order to avoid instability in operation when the instrument is started, so that the wear head rotates for 10 seconds and stops, and slightly brushing worn floating particles which float on the surface of the test piece; 6, performing data acquisition, and testing an equivalent sound level value of the average noise level; and 6, checking the data validity. The method is used for testing and evaluating the micro-surfacing mixture noise.
Owner:HARBIN INST OF TECH

Preparation method and application of uniform-size graphene quantum dots

The invention provides a preparation method and application of uniform-size graphene quantum dots. The method adopts a strategy from top to bottom; oxidized graphene is used as raw materials; an ultrasonic auxiliary hydrothermal method is used; the ultrasonic mechanical stress is used for assisting the high oxidation effect of nitric acid for cutting carbon-carbon bonds; then, high-temperature heat treatment is performed to prepare a pure graphene quantum dot material with the uniformly distributed size. The method process is simple; the conditions are mild; the prepared graphene quantum dotshave good purity degree, small particle diameter and uniformly distributed size. Used as an electrode material of an energy storage device, the prepared graphene quantum dot material shows excellent electrical conductivity, high specific capacity, excellent rate performance, fast ion adsorption and transmission rate and long cycle service life; good application potential is realized in the field of energy storage devices.
Owner:QINGDAO UNIV OF SCI & TECH

Unmanned vehicle test platform

InactiveCN108844752AMake up for the shortcomings of limited actual traffic environment scenesControllable test conditionsVehicle testingRoad surfaceTest platform
An unmanned vehicle in the development process requires a large number of experiments to verify whether the intelligent decision-making level has reached the conditions of completely autonomous driving. An unmanned vehicle test platform is used for providing simulation test scenes for the unmanned vehicle. The unmanned vehicle test platform comprises a main control computer, a projector, a motionsimulation platform, a motion simulation platform controller, the unmanned vehicle and a switch, wherein the motion simulation platform controller is connected with the motion simulation platform, theunmanned vehicle is arranged on the motion simulation platform, the main control computer is used for coordinating normal operation of all the parts of the platform, functions include generating simulation traffic scenes, communicating with the unmanned vehicle through the switch, transmitting the gesture information to the motion simulation platform controller and recording test data in the testprocess, and the projector is used for projecting the simulation traffic scenes generated by the main control computer onto a screen. The unmanned vehicle test platform is advantaged in that virtualtraffic scenes are used instead of the traditional actual road test environment, test conditions are controllable, and the emergency handling ability of the unmanned vehicle can be tested.
Owner:魏振元 +1

Test device used for testing resistance reduction performance of antifouling coating

InactiveCN104034507AEasy to operateEasy to control test conditionsHydrodynamic testingElectric machineryTorque sensor
The invention discloses a test device used for testing resistance reduction performance of an antifouling coating. The device comprises three units, respectively a resistance test box, a navigation simulation test device and a software control system. The resistance test box comprises a load bearing, a connecting shaft, a sample loading device, a torque sensor and a test tank; the connecting shaft is sequentially provided with a motor, a connector A, a torque sensor, a connector B, a load bearing and a sample loading device from the top bottom; the test tank is located below the connecting shaft; and the navigation simulation test device is composed of a plurality of independent navigation simulation test boxes, each independent navigation simulation test box is internally provided with a motor rotation drive, and the navigation simulation test box is internally provided with sea water. Through controlling changes and frequencies of factors such as the flow speed and the temperature, different turbulence states are formed, resistance changes of the energy-saving resistance-reduction coating in ship navigation simulation state can be tested, and the resistance-reduction effects of the coating can be evaluated.
Owner:725TH RES INST OF CHINA SHIPBUILDING INDAL CORP

Efficient identification method for drought resistance ability of alfalfa varieties

The invention discloses an efficient identification method for the drought resistance ability of alfalfa varieties. The method comprises the following steps: carrying out polyethylene glycol PEG-6,000-simulated drought stress treatment; measuring physiological indexes with the most sensitive change and sensitive thresholds of the alfalfa varieties with different drought resistance levels when responding to different stress intensity; building sensitive physiological index groups and sensitive threshold index systems corresponding to the drought resistance levels of the alfalfa varieties; and dividing to-be-identified alfalfa varieties into high drought resistance, medium drought resistance and low drought resistance. According to the identification method, when the drought stress is simulated by different concentration of PEG-6,000, the sensitive physiological index groups and the sensitive threshold index systems corresponding to the drought resistance levels are built on the basis of physiological indexes which are closely related to the alfalfa varieties with different drought resistance levels and the sensitive thresholds as identification bases, and the drought resistance ability of the alfalfa is graded, so that the comprehensive evaluation result of the drought resistance of the alfalfa is improved, the method has good operability and reliability, identification of the drought resistance can be completed in a laboratory, the conditions are easy to control and the cost is low.
Owner:GANSU AGRI UNIV

Ground mechanical characteristic and parameter test bench of mountain caterpillar tractor

The invention discloses a ground mechanical characteristic and parameter test bench of a mountain caterpillar tractor. The test bench is composed of a mechanical system, a camera system, and a data acquisition and analysis system. The mechanical system consists of a hydraulic power console, a hydraulic cylinder, a soil tank and soil. The camera system includes an endoscope console and an industrial endoscope. The data acquisition and analysis system includes two dynamic signal test analyzers, a synchronous clock signal generator, a single-layer pressure sensor network, a multi-layer pressure sensor network and an upper computer. The ground mechanical characteristic and parameter test bench can be applied to the traction attachment testing of the mountain caterpillar tractor on the slope condition; and the real-time collection, real-time storage, real-time display, and real-time analysis of the mechanical performance index and related data of the tractor on the slope condition can be realized. Therefore, the test bench having high practicability has the great promotion and application value.
Owner:NORTHWEST A & F UNIV

System and method for measuring comprehensive radiation absorption coefficient of surface of building material

The invention discloses a system for measuring the comprehensive radiation absorption coefficient of the surface of a building material. The system comprises a thermal insulation box, a solar total radiation sensor, an anemometer, a small automatic weather station, a thermocouple temperature sensor, an air temperature sensor, a water temperature sensor and a building materials test piece. The building material test piece and the thermal insulation box form a closed box, and the water temperature sensor is arranged in the box; the thermocouple temperature sensor is arranged on the surface of the building material test piece; the air temperature sensor is arranged in a test environment; the solar total radiation sensor and the anemometer are arranged nearby the building material test piece;the total solar radiation sensor is used for detecting the total solar radiation quantity; the anemometer is used for detecting the speed of wind flowing through the outer surface of the building material test piece; and the small automatic weather station is used for collecting and storing data in real time. The comprehensive radiation absorption coefficient is directly measured in a natural environment in order to well simulate the radiant heat behavior of an actual engineering structure material in a service environment.
Owner:SOUTH CHINA UNIV OF TECH

Building material surface radiation absorption coefficient calculation method considering long and short wave difference

The invention discloses a building material surface radiation absorption coefficient calculation method considering long and short wave difference, which comprises the following steps: S1, putting a building material test piece wrapped by a thermal insulation box in a surrounding open and unshielded natural environment, and establishing a thermal boundary equilibrium equation when only the upper surface of the building material test piece is in contact with the surrounding environment; s2, recording related data; s3, selecting a certain time period in the time section of continuous heating or continuous cooling of the building material test piece, and calculating the thermal change quantity Qs, the convective heat exchange quantity Qc and the thermal radiation quantity Isr of the building material test piece; s4, in a natural environment which is cloudy and rain-free at night and is open and free of shielding, the quantity of direct solar radiation and scattered solar radiation is zero, and the long-wave radiation absorption coefficient of the outer surface of the building material test block is calculated through a transformation formula; and S5, selecting system heat exchange in a certain time period in a natural environment which is sunny in the daytime and is open and unshielded in the surrounding, recording related data, and calculating the short-wave radiation absorption coefficient of the building material test piece.
Owner:SOUTH CHINA UNIV OF TECH

Metal hose flow characteristic testing device and method

The invention relates to a metal hose flow characteristic testing device and method. Each of front and back pressure difference current stabilizing tubes of the device is communicated with the two ends of multiple parallel pressure difference testing pipes, the back pressure difference current stabilizing tube is connected to a pressure stabilizing water tank, an outlet of the pressure stabilizingwater tank is connected to multiple parallel flow testing pipes, and each flow testing pipe comprises front and back flow current stabilizing tubes; a heating device is installed in the pressure stabling water tank, and forms cooling circulation together with a cooling set; the signal output end of each of an upper pressure sensor, a lower temperature sensor, a pressure difference sensor and a flowmeter is connected with the controlled ends of a pressure regulator valve, the heating device and the cooling set via a control unit; a pressure difference and flow selected control output end of the control unit end is connected to the controlled end of a pressure difference selected control valve and a flow selected control valve; and the control unit includes an intelligent device and a display device. Thus, influence of temperature instability on flow resistance can be avoided, the proper control selective pipe can be selected automatically, an accurate test structure is obtained, and the working efficiency is improved.
Owner:AEROSUN CORP

Stability index test platform of mountain crawler tractor

The invention discloses a stability index test platform of a mountain crawler tractor. The test platform is composed of a mechanical system, an image collection system, a light supplementing system, and a data acquisition and analysis system. The mechanical system consists of a hydraulic power console, a hydraulic cylinder, a soil tank and soil. The image collection system includes a camera console and an industrial camera group. The light supplementing system is a high light lamp group. The data acquisition and analysis system includes a dynamic signal test analyzer, a synchronous clock signal generator, a pressure sensor network, and an upper computer. According to the invention, the test platform can be applied to stability testing of a mountain crawler tractor on the slope working condition; and the real-time collection, real-time storage, real-time display, and real-time analysis of the mechanical performance index and related data of the tractor on the slope condition can be realized. Therefore, the stability index test platform having high practicability has the great promotion and application value.
Owner:NORTHWEST A & F UNIV

Measurement system and method for building material surface convective heat exchange coefficient

The invention discloses a measurement system for a building material surface convective heat exchange coefficient. The measurement system consists of a thermal insulation box, industrial fan, an anemometer, a small automatic weather station, thermocouple temperature sensors, an air temperature sensor, a water temperature sensor and a building material test piece. Thermal insulation box and the building material test piece compose an enclosed box; the water temperature sensor is disposed in the thermal insulation box; the thermocouple temperature sensors are disposed on the surface of the building material test piece; the air temperature sensor is arranged in an external environment; and the thermocouple temperature sensors, the air temperature sensor, the water temperature sensor and the anemometer are all connected to the small automatic weather station for real-time acquisition and storage of test data. Based on the theory of heat transfer, the measurement system and method providedby the invention can achieve efficient, simple and accurate measurement of the convective heat exchange coefficient between a building material and the external environment, also take the heat absorption and heat release processes into account, can better simulate the thermal behavior of an actual engineering structural material in a service environment, and have good application prospects.
Owner:SOUTH CHINA UNIV OF TECH

An indoor test device and method for simulating car driving on road noise at micro-surface

The invention discloses a device and a method for testing noise indoors by means of simulating driving of an automobile on a micro-surfacing road surface, and relates to a testing device and a testing method, in particular to the device and method for testing the noise indoors by means of simulating the driving of the automobile on the micro-surfacing road surface. The invention aims to solve the problems that a lot of manpower and material resources are necessarily consumed, and a measurement structure is affected by difficultly-controlled factors, such as wind speed, background noise, traffic flow and the like in a certain degree during the process of testing the noise of the micro-surfacing road surface outdoors. The device comprises a pedestal, a circular runway, a testing wheel, a transverse shaft, a vertical shaft, a driving shaft, a lifting vertical shaft rotary knob, a driven gear, a driving gear, a hinged column base and an engine, wherein the circular runway is arranged on the upper surface of the pedestal; the engine is arranged in the pedestal; the lower end of the driving shaft is arranged at the middle part of the inner bottom surface of the pedestal through the hinged column base; the driven gear is arranged on the driving shaft in a sheathing manner. The device and the method disclosed by the invention are applied to testing of the noise of the micro-surfacing road surface.
Owner:HARBIN INST OF TECH

System and method for measuring surface convective heat transfer coefficient of building materials

The invention discloses a measurement system for a building material surface convective heat exchange coefficient. The measurement system consists of a thermal insulation box, industrial fan, an anemometer, a small automatic weather station, thermocouple temperature sensors, an air temperature sensor, a water temperature sensor and a building material test piece. Thermal insulation box and the building material test piece compose an enclosed box; the water temperature sensor is disposed in the thermal insulation box; the thermocouple temperature sensors are disposed on the surface of the building material test piece; the air temperature sensor is arranged in an external environment; and the thermocouple temperature sensors, the air temperature sensor, the water temperature sensor and the anemometer are all connected to the small automatic weather station for real-time acquisition and storage of test data. Based on the theory of heat transfer, the measurement system and method providedby the invention can achieve efficient, simple and accurate measurement of the convective heat exchange coefficient between a building material and the external environment, also take the heat absorption and heat release processes into account, can better simulate the thermal behavior of an actual engineering structural material in a service environment, and have good application prospects.
Owner:SOUTH CHINA UNIV OF TECH

A three-way static and dynamic loading model test platform for bridge deep water foundation

ActiveCN103510551BSolve the technical problem of vertical loading influenceSmall sizeFoundation testingHorizontal forceEngineering
The invention discloses a three-directional static and dynamic loading model test platform for deep water foundations of bridges. The three-directional static and dynamic loading model test platform comprises a test foundation trench, a vertical loading system, a horizontal bi-directional loading system and a water level simulating system. The test foundation trench is used for arrangement of foundation soil, water and models. The vertical loading system used for applying vertical static and dynamic action on the models is installed at the top of the test foundation trench, the horizontal bi-directional loading system used for applying two or more horizontal static and dynamic actions on each model is installed on the upper portion of the inner side wall of the test foundation trench, and the water level simulating system used for water feeding and draining and test water level control in the test foundation trench is installed on the bottom and the outer side of the outer side wall of the test foundation trench. Test and research on the models of bridge deep water foundations such grouped piles, sink shafts, caissons and compound foundations and bridge towers (piles) under three-directional static and dynamic actions such as the vertical static and dynamic action and the horizontal bi-directional static and dynamic action can be carried out by the test platform, and the test platform solves problems about simulation of static and dynamic mutual action of the foundation soil-water-bridge deep water foundation-bridge tower (pile) under the combined working conditions of vertical force, horizontal force, bending moment, torque and the like.
Owner:CCCC HIGHWAY BRIDNAT ENG RES CENT

An insulation performance test device for EMU roof insulators in complex environments

ActiveCN109307828BGuaranteed safe operationSmall variation in insulation propertiesTesting dielectric strengthSpeed testUltraviolet
An insulation performance test device for EMU roof insulators in a complex environment. There are four chambers from left to right: the stable chamber, the low-speed test chamber, the high-speed test chamber and the expansion chamber, and the left side of the stable chamber and the aerosol generator The nozzles of the low-speed test chamber are connected to each other, and the upper part is provided with a funnel; there are roof insulators in the low-speed test chamber, and the upper end of the roof insulator is connected to a high-voltage power supply; the upper surface of the inner wall of the low-speed test chamber is equipped with an ultraviolet There is a glass observation window at the top; a negative pressure fan and an anemometer are installed at the right end of the expansion chamber. The test environment is close to the actual operating environment of the roof insulator, and the test results are more accurate and reliable. At the same time, it can also test and analyze the relationship between various environmental factors and the insulation performance of the roof insulator. So as to provide a more reliable and accurate test basis for the design, manufacture and maintenance of the roof insulator, and better ensure the safe operation of the train.
Owner:SOUTHWEST JIAOTONG UNIV

Test platform for mountain crawler tractor stability and indexes thereof

The invention discloses a test platform for mountain crawler tractor stability and indexes thereof. The test platform consists of a mechanical system, a camera system and a data acquisition and analysis system. The mechanical system includes hydraulic power control platform, a hydraulic cylinder, a soil trough and soil; the camera system includes a high speed camera, an endoscope control platformand an industrial endoscope; the data acquisition and analysis system includes a dynamic signal test analyzer, a synchronous clock signal generator, a single-layer pressure sensor network and an upperposition computer. The test platform for mountain crawler tractor stability and indexes thereof can be used for the stability test of a mountain crawler tractor under sloping field working conditions; mechanical performance indexes and related data of the tractor under the sloping field working conditions can be collected, stored, displayed and analyzed in real time; the test platform is strong in practicality and high in promotion and application value.
Owner:NORTHWEST A & F UNIV

A method for determining the acute and chronic toxicity of drugs to hornet mites

The invention discloses a method for measuring acute and chronic toxicity of a drug against varroa jacobsoni. The method comprises the following steps: gently spraying the to-be-measured liquid onto the surfaces of healthy bee larvae; transferring the bee larvae from the inside of a larva culture plate into a bee pupa culture cup with the liquid-infiltrated filter paper piece at the bottom; collecting the to-be-measured varroa jacobsoni; introducing a varroa jacobsoni into the bee pupa culture cups of each treatment group and control group, and sealing the cup rims of the bee pupa culture cups with ventilated transparent films to prevent the introduced varroa jacobsoni from escaping the bee pupa culture cups; putting the bee pupa culture cups into an incubator for culturing, wherein the temperature is 34.5 DEG C, and the relative humidity is 75%; counting the deaths of varroa jacobsoni 48h or 72h later, calculating the death rate and analyzing the acute toxicity of the drug against varroa jacobsoni; or continuously recording the survival conditions of the varroa jacobsoni every day, counting the survival time of each varroa jacobsoni, and analyzing the chronic toxicity of the drug against varroa jacobsoni. The method disclosed by the invention has the advantages of controllable experiment conditions, high survival rate of the varroa jacobsoni, long survival time and accurate and credible result.
Owner:BEE RES INST CHINESE ACAD OF AGRI SCI

Mountain crawler tractor static stability testing platform

The invention discloses a mountain crawler tractor static stability testing platform. The platform is composed of a mechanical system, a camera system and a data collection and analysis system. The mechanical system comprises a hydraulic pump station, a hydraulic cylinder, a soil groove and soil; the camera system comprises a high-speed camera, an endoscope controlling platform and an industrial endoscope; the data collection and analysis system comprises a dynamic signal testing and analysis instrument, a synchronous clock signal generator, a single-layer pressure sensor network and an uppercomputer. The testing platform can be used for a stability test under the working condition of slopes of a mountain crawler tractor, real-time collection, real-time storage, real-time display and real-time analysis can be achieved aiming at stability indexes and related data of the mountain crawler tractor under the working condition of the slopes, the practicability is strong, and the testing platform has strong popularization and application value.
Owner:NORTHWEST A & F UNIV

High-low temperature bending test device for pipe

The invention belongs to the field of pipe testing, and discloses a high-low temperature bending test device for a pipe. The device comprises a high-low temperature test box, a support frame, a lock pipe fitting and rolling wheels; the support frame is arranged in the high-low temperature test box; the lock pipe fitting is arranged on the support frame and used for fixing a pipe; and the rolling wheels are arranged on the support frame and located below the lock pipe fitting, and the rolling wheels can move in a reciprocating mode in the first direction and are used for bending or loosening the pipe stretching out of the bottom of the lock pipe fitting. The high-low temperature cycle test and the bending fatigue test are combined, the testing period is short, the real using performance of the pipe can be reflected, and meanwhile the testing device is controllable in testing condition, easy to operate and stable in testing process.
Owner:SHANGHAI CHANGYUAN ELECTRONICS MATERIAL

Mechanical property testing bench for hilly area crawler tractor

The invention discloses a mechanical property testing bench for a hilly area crawler tractor. The mechanical property testing bench consists of a mechanical system, a camera system, and a data collection and analysis system, wherein the mechanical system comprises a hydraulic power control panel, a hydraulic cylinder, a soil tank and soil; the camera system comprises a high-speed camera, an endoscope control panel and an industrial endoscope; the data collection and analysis system comprises two dynamic signal test analyzers, a synchronous clock signal generator, a single-layer pressure sensornetwork, a multi-layer pressure sensor network and an upper computer. The mechanical property testing bench for the hilly area crawler tractor has the advantages that the mechanical property testingbench can be applied to the stability test and the traction and attachment property test of the hilly area crawler tractor under the working condition of hilly area, and various mechanical property indexes and related data of the tractor under the working condition of hilly area can be collected, stored, displayed and analyzed in real time; the practicality is strong, and the popularization and popularization value is stronger.
Owner:NORTHWEST A & F UNIV

A Modeling Method for Jointly Evaluating the Bioavailability and Toxicity of Food Cadmium Accumulation in Human

The invention relates to a method for establishing a model for jointly evaluating the bioavailability and toxicity of food cadmium accumulation on the human body, comprising the following steps: (1) digestion of food samples and acquisition of measurement liquid: a. After the food samples are collected, grind them and use gastric juice and intestinal juice in sequence; b. Centrifuge the digestion mixture, collect the supernatant, and sterilize under high pressure; (2) Cultivate Caco-2 cells and 293T cells alone; (3) Combined culture of Caco-2 cells and 293T cells: The insertion tank with Caco-2 cells cultured was moved into a six-well plate with 293T cells cultured, and continued to culture for 24 hours; (4) Evaluation of cadmium bioavailability and toxicity: the food sample assay solution was placed in the Caco-2 cells of the joint culture model At the same time, add isotonic incubation solution on the 293T cell layer and continue to culture for 24 hours; in chronic toxicity test, the longest joint culture can be 10 days; (5) Index detection. The invention has the characteristics of simple operation, easy control of test conditions, less pollution, economy, accurate results, etc., and has the advantages of joint evaluation of biological effectiveness and toxicity. It is suitable for the safety evaluation of cadmium accumulation in grains, vegetables and animal foods.
Owner:HENAN UNIV OF SCI & TECH

An Indoor Soil Explosion Dust Test System

The invention discloses an indoor soil explosion dust test system, which belongs to the technical field of explosion testing. The system includes an explosion hole, an explosion subsystem, a flash X-ray subsystem, a high-speed camera subsystem, a laser transmission characteristic test subsystem and a trigger device. The explosion hole has a double-layer structure inside and outside; the explosion subsystem is set in the inner layer of the explosion hole to generate soil explosion dust; the flash X-ray subsystem can capture the dust image of the soil explosion at a specific moment in the early stage of the explosion; the high-speed camera subsystem can record The dust diffusion process of the soil explosion; the laser transmission characteristic test subsystem can collect and store the echo data of the laser in the dust environment of the soil explosion; the trigger device can realize the simultaneous triggering of each subsystem. The invention can not only record the diffusion process of the soil explosion dust, but also obtain the echo data of the laser in the soil explosion dust environment, the test environment condition is controllable, the test is safe and the cost is low.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Mountain caterpillar tractor traction adhesion performance test platform

The invention discloses a mountain caterpillar tractor traction adhesion performance test platform. The test platform is composed of a mechanical system, a camera system, a lighting system and a dataacquisition and analysis system. The mechanical system includes a hydraulic pump station, a hydraulic cylinder, a soil groove and soil; the camera system includes a camera console and industrial camera groups; the lighting system includes strong light groups; the data acquisition and analysis system includes two dynamic signal test analyzers, a USB3.0 hub, a synchronous clock signal generator, pressure sensor networks and an upper computer. The mountain caterpillar tractor traction adhesion performance test platform can be used for a traction adhesion performance test of a mountain caterpillartractor under slope working conditions and determination of correlated parameters, real-time acquisition, real-time storage, real-time display and real-time analysis of mechanical performance indexesand correlated data of the tractor under the slope working conditions can be achieved, the practicality is high, and the popularization and application value is high.
Owner:NORTHWEST A & F UNIV

A measurement system and method for comprehensive radiation absorption coefficient of building material surface

The invention discloses a system for measuring the comprehensive radiation absorption coefficient of the surface of a building material. The system comprises a thermal insulation box, a solar total radiation sensor, an anemometer, a small automatic weather station, a thermocouple temperature sensor, an air temperature sensor, a water temperature sensor and a building materials test piece. The building material test piece and the thermal insulation box form a closed box, and the water temperature sensor is arranged in the box; the thermocouple temperature sensor is arranged on the surface of the building material test piece; the air temperature sensor is arranged in a test environment; the solar total radiation sensor and the anemometer are arranged nearby the building material test piece;the total solar radiation sensor is used for detecting the total solar radiation quantity; the anemometer is used for detecting the speed of wind flowing through the outer surface of the building material test piece; and the small automatic weather station is used for collecting and storing data in real time. The comprehensive radiation absorption coefficient is directly measured in a natural environment in order to well simulate the radiant heat behavior of an actual engineering structure material in a service environment.
Owner:SOUTH CHINA UNIV OF TECH

Temperature-rise test device and method for sealed double-row angular contact ball bearings

The invention belongs to the technical field of bearing test equipment, and relates to a temperature-rise test device and method for sealed double-row angular contact ball bearings. A main body of the temperature-rise test device structurally comprises a driving motor, a driving belt wheel, a small belt wheel, a rotation speed sensor, a driving shaft, a control system, a main shaft, a sleeve, an iron sheet, a test bearing, a stress and measurement device, a locking nut, a withdrawal nut, an adapter sleeve, a body, a driving belt, a shell and a stud. The temperature-rise test method comprises the following four steps of: setting test parameters, and starting the test device; determining bearing temperature and environment temperature at initial rotation speed; measuring the bearing temperature and the environment temperature at rated rotation speed; and disassembling the bearing, and performing statistical computation on the measured temperature. The device and the method are applicable to a temperature-rise test on double-row angular contact ball bearings. A test result can be reproduced, and the consistency of test data is high; and the device is simple in structure, principle is reliable, test cost is low, the test result is accurate, test condition is easily controllable, and environmental friendliness can be achieved.
Owner:QINGDAO TAIDE AUTOMOBILE BEARING
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