37results about How to "Same test conditions" patented technology

The fast detection device for microwave ceramics includes an opening parallel plate resonant cavity with step motor, a SCM, a driver for motor, a VNA, and a computer. This invention can detect target dielectric properties with no harm and high precision.

The invention discloses a detection system for air tightness of a valve. The system comprises a water tank, a water tank bracket, upper and lower pneumatic cylinders, a manipulator bracket, a plurality of manipulators and a manipulator transmission mechanism, wherein a water channel, a water inlet cylinder and a plurality of valve clamping fixtures are arranged in the water tank; the valve clamping fixtures are connected with the water inlet cylinder; the water tank bracket is fixedly arranged on the upper side of the water tank; the upper and lower pneumatic cylinders are arranged on the water tank bracket; the manipulator bracket is connected with piston rods of the upper and lower pneumatic cylinders; the manipulators are ranged on the manipulator bracket; each manipulator comprises a main shaft, a manipulator cylinder, a manipulator clamp and two clamping arms; the main shafts are provided with transmission gears; the manipulator cylinders are connected with the main shafts; the manipulator clamps are fixedly connected with the manipulator cylinders; the clamping arms are hinged in the manipulator clamps; one end of each clamping arm is hinged to the piston rod of the manipulator cylinder through a connecting arm respectively; the manipulator transmission mechanism comprises a transmission cylinder and a rack which is fixedly connected to the transmission cylinder; each transmission gear is engaged with the rack. The system can realize that the opening angle of a to-be-tested valve at each station is consistent to guarantee consistent testing condition of each to-be-tested valve and further achieve a more accurate test result.

The invention provides material biological compost degradability detection evaluation equipment and a material biological compost degradability detection evaluation method. The equipment comprises an air supply and purification system, an air flow control system, a compost reaction system, a temperature control system and a CO2 absorption system which are arranged in sequence, wherein the air supply and purification system comprises an air compressor, a suck-back preventing bottle, an air purification bottle, a pressure maintaining valve, a pressure regulating valve and an electromagnetic valve, connected in sequence; the air flow control system comprises a flow control device; the compost reaction system comprises a humidification bottle and a compost reaction bottle; the CO2 absorption system comprises a condensation bottle and a CO2 absorption bottle. The equipment and the method have the benefits that inorganic carbon dissolved in the CO2 absorption bottle can be detected periodically through a potentiometric titration method to be taken as the accumulated CO2 emission capacity generated by the compost reaction bottle, and the method is simple and accurate.

The invention relates to an SCR denitration catalyst evaluation device, which can evaluate the performance of an SCR denitration catalyst under real conditions. The basic flue gas of the evaluation device is generated by a gas boiler or a fuel boiler. The evaluation device is provided with a gas distribution system and a flue gas mixing device, which can evenly add NO, NH3, SO2, O2, and H2O into the basic flue gas. A two section type pre-heater is provided and is capable of preheating the flue gas to a temperature of 200-550 DEG C. A reactor is arranged after a secondary pre-heater and is composed of 2 to 4 serially connected reaction pipes. The size of the inner cross section of each reaction pipe is 50*50-150*150 mm, and the length of each reaction pipe is 500 to 1500 mm. The work temperature is 200 to 450 DEG C. The evaluation device is provided with a sampling pipeline, which is used to carry out online analysis on the concentrations of components in the flue gas. One end of the sampling pipeline is connected to the sampling ports in the front and rear part of each reaction pipe through switch valves and the other end is connected to an online analysis system. A programmable logic controller is adopted, by controlling a human-computer interaction interface in a computer, a functional element is controlled, and all operation parameters and analysis results are recorded in real time by using database software.

The invention relates to a device and a method for measuring the bursting temperature of pellet cores, which belong to the technical field of performance test of iron ore pellets. The device comprises a cup, a combustion chamber, a hanging basket, mass flow controllers and a computer, wherein the bottom of the cup is connected with the lower part of the combustion chamber through a U-shaped insulating tube, the upside of the cup is fixed with two supporting seats, the hanging basket is hung in the cup by a steel pole, a thermocouple is inserted from the side wall of the cup and is connected with the computer through a data wire, the upside of the combustion chamber is provided with a combustion nozzle and a combustion-supporting air inlet which are connected with a gas tank and an air blower respectively through a gas pipeline and a combustion-supporting air pipeline, and each gas pipeline is provided with the mass flow controller. The device and the method have the advantages that the test efficiency is high, a plurality of samples are tested in the same cup at the same time, and the test conditions are in accordance with the analysis of test results; and besides, the test device uses the mass flow controllers and the computer for automatic control, so that the control accuracy of the test temperature and the gas flow is improved.

The invention discloses a device and a method for indirectly testing the performance of a fire detection tube. A medium capable of generating high pressure gas is filled in a gas bottle of the device; one end of the tested fire detection tube is connected with the outlet of a pressure regulating valve, and the other end of the tested fire detection tube is sealed by an end connector; a test section at the center of the fire detection tube is fixed on a fixed plate; a cover plate is arranged on a test box; the fixed plate is positioned on the test box; a part of the fire detection tube on the fixed plate is soaked into the liquid medium; a timer is arranged on the lateral surface of the test box below the fixed plate; a heat source is arranged at one side of the test box and is completely soaked into the liquid medium; and a temperature testing element is arranged on the test box and is arranged in the liquid medium. The invention realizes the purpose of conveniently and accurately regulating the test pressure; when the fire detection tube is broken, gas can overflow out of the liquid medium and can not pollute the liquid medium; the indirect method which uses the liquid medium for simulating the heating environment in the working process of the fire detection tube has the advantages of high control accuracy of test temperature, simple structure, safe operation and low cost; and the device can be used as standard equipment to be popularized and used.

The invention provides a determination method applicable to the purification effect of a passive air purification product on TVOC. The method includes the steps of: S1. preparing a TVOC contamination liquid; S2. maintaining consistent test conditions to a test chamber and a blank chamber, and putting a to-be-tested sample in the test chamber; S3. adding the TVOC contamination liquid prepared by S1 at an equal amount to the test chamber and the blank chamber; S4. acquiring the initial concentration of TVOC in the two experimental chambers, and after a period of reaction, acquiring the terminate concentration of TVOC in the two experimental chambers respectively; and S5. conducting test analysis and calculating the natural attenuation rate of the blank chamber and the purification efficiency of the to-be-tested sample on TVOC pollutants. The method provided by the invention uses the experimental chambers special for air purification detection, can effectively prevent the leakage of TVOC pollutants, also reduces the experimental operation error and shortens the whole test cycle, and significantly improves the test accuracy and result repeatability, and can be used for identification and evaluation of the purification performance of a passive air purification product on TVOC pollutants.

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 belongs to an insect feeding device, and particularly discloses an adult plutellaxylostella feeding bottle. The feeding bottle comprises a feeding bottle body and a plug, wherein openings are formed in the two ends of the feeding bottle body, the plug is arranged in the opening in one end, the other end of the feeding bottle body is sealed with a preservative film I and a preservative film II, the preservative film I is located on the inner side, the preservative film II is located on the outer side, the preservative film I is provided with multiple holes, and multiple vegetable leaves are arranged between the preservative film I and the preservative film II; the plug comprises a bottle body, a bottle cap and a KT plate, and distilled water is arranged in the bottle body. By the adoption of the feeding bottle, continuous and stable supply of water is guaranteed, and shooting of eggs on the main egg laying surface is more convenient.

The invention provides a multi-channel inertial navigation test system, and relates to the technical field of inertial navigation tests. The system comprises a processor, and an input / output module and a storage module which are electrically connected with the processor, wherein the input / output module is used for being connected with inertial navigation equipment, the processor is used for achieving interactive communication with the inertial navigation equipment through the input / output module and conducting logic processing on input data, and the storage module is used for storing test programs, test data and test results. The system can effectively shorten the respective test time of multiple sets of systems, can ensure that the test conditions of each set of system are completely consistent, can support various types of hardware interfaces, and has certain universality.

The invention discloses a dye-sensitized solar open cell assembly test clamp which is characterized in that a polytetrafluoroethylene tube is fixed on a cuboid base; the polytetrafluoroethylene tube is filled with an upper cylinder, a lower cylinder and a spring positioned between the upper cylinder and the lower cylinder; the lower cylinder near the cuboid base is fixed to the outer tube of the polytetrafluoroethylene tube by a fixing screw; the upper cylinder near the top end of the cuboid base passes through the outer tube wall of the polytetrafluoroethylene tube to be connected with a button; a locking member is arranged on the upper end of the polytetrafluoroethylene tube; a diaphragm is arranged on the locking member; and the diaphragm is provided with a liquid inlet pipe and an exhaust pipe. The dye-sensitized solar open cell assembly test clamp has the advantage that a solar cell can be firmly clamped during test through simple cooperation of the spring, the cylindrical core and the locking member so as to ensure the stability of the test environment.

The system comprises a test assembly and a regulation and control assembly used for regulating the test environment, the test assembly comprises a test box body, a box cover and a time control light source mechanism, a connecting shaft is arranged in the box body in the axis direction, the connecting shaft is of a hollow structure, and the connecting shaft is connected with the test box body through a connecting rod. A plurality of partition plates are arranged on the connecting shaft at intervals in the circumferential direction, the partition plates divide the interior of the box body into at least two test cavities, the test cavity is formed between any two partition plates, the free ends of the partition plates abut against the inner wall of the box body, the test box body is divided into a plurality of parts through the partition plates, and therefore the test conditions are the same; reliable single test comparison is facilitated, accurate test data can be obtained, test time and resource investment can be greatly saved, multiple illumination intensity areas are provided, a light sensing area is more reasonable, a light sensing path is appropriate, an experiment result is more reliable, and large scientific research test and scientific value is achieved.

The invention discloses a coating wear-resistant and impact-resistant comprehensive performance evaluation device and method. The evaluation device comprises a bottom plate; a soil test box which is arranged on the bottom plate, and is used for being filled with simulation test soil; a rotating device which is arranged on the bottom plate and comprises a driving system and a rotating system, wherein the driving system provides power for the rotating system; a lifting device which is arranged on the bottom plate and is used for lifting the rotating system of the rotating device; and at least two multi-specification coating samples which are mounted on the rotating system of the rotating device, extend into the soil test box and can perform autorotation and planetary motion along with the rotation of the rotating system. According to the coating wear-resistant and impact-resistant comprehensive performance evaluation device and method, actual working conditions can be simulated more accurately, and the surface coating performance of the agricultural machinery buried part can be evaluated.

The invention discloses a device for measuring the expansion rate of an oil well cement test block and belongs to the technical field of cement preparation. The device comprises a base, stand columns and a clamping arm, the lower ends of the stand columns are connected with the base, and the upper ends of the stand columns are connected with the clamping arm; the device is characterized by further comprising a thermotank and a temperature controller, the thermotank is fixed to the base, the inner wall of the thermotank is connected with a heating tube, the outer wall of the thermotank is connected with an insulating layer, the inner wall of the thermotank is connected with a thermocouple, the temperature controller is electrically connected with the thermocouple and the heating tube, the clamping arm is connected with a dial gauge, a downward-recessed seat is fixed to the bottom wall of the interior of the thermotank, an upward-recessed seat is fixed to the top wall, the upward-recessed seat penetrates through the top wall of the thermotank and is connected with the dial gauge, and a standard bar is inlaid between the downward-recessed seat and the upward-recessed seat. By means of the device, the expansion rate of the oil well cement test block can be measured under different environment temperatures, objective data reference is provided for oil well cement under site construction, and the device has the advantages of being high in measurement precision and accuracy.

Some sample of relevant food is estimated by some professionals with their sensory organ or tested through conventional physical and chemical analysis to establish correlative data base. Some other sample is determined with sensor array through carrying the smell of the food to the sensor array reaction chamber via carrier gas, amplifying and filtering the signal from the sensor array, A / D conversion in A / D converter and data processing in computer. The result of computer processing is related with those in the established data base and one knowledge library is obtained through learning for the determination of truth and quality of tested sample. The said method is fast and simple, needs no pre-treatment of the sample and organic solvent extraction, and has the artificial intelligent identification to unknown sample. The present invention facilitates the physical and chemical analysis of food products.

The invention discloses a device for hydro-mechanical characteristic test sampling and harmful gas cutting efficiency test. The device for the hydro-mechanical characteristic test sampling and the harmful gas cutting efficiency test comprises a compressed air source, a gas storage tank, gas flowmeters, stop valves, a safety valve and a simulated gas source. The compressed air source is connected in parallel with the first gas flowmeter via the gas storage tank and is connected with six function-I test rooms and (n-1) function-II test rooms via a plurality of first stop valves; connectors are formed at the bottoms of the function-I test rooms and (n-1) function-II test rooms to be connected with the simulated gas source via one third stop valve after respectively being connected in parallelvia n second stop valves; connectors are respectively formed on the left sides of the function-I test rooms and (n-1) function-II test rooms to be connected to one safety valve via one second gas flowmeter; and connectors are respectively formed at the tops of the (n-1) function-II test rooms to be connected with one fourth stop valve. The device is simple and convenient in design, flexible to operate and good in integrality and can provide help for hydro-mechanical characteristic timeliness test sampling and landfill gas cutting timeliness test research of superstratum soil mass of a landfill.

The invention provides a novel AC-DC series-parallel capacitor durability test jig circuit. The novel AC-DC series-parallel capacitor durability test jig circuit comprises a first DC-DC and AC-DC assembly module, a second DC-DC and AC-DC assembly module, a DC circuit control module, an AC circuit control module and a capacitor assembly module to be tested. On the basis of a series-parallel connection mode, direct-current voltage and high-frequency alternating current are applied to a capacitor and the design standard of the capacitor is verified by applying the direct-current voltage and the high-frequency alternating current and utilizing the working principle of direct current blocking and alternating current passing of the capacitor, so that a series connection mode is adopted for an alternating-current loop, and alternating-current voltage is applied to the two ends of the series-connected capacitor; the alternating current passing through each capacitor is ensured to be equal; and a direct-current loop adopts a parallel connection mode, direct-current bias voltage is applied to each capacitor to be tested through the direct-current and alternating-current blocking assembly module, and it is guaranteed that direct-current voltage on each capacitor to be tested is equal.

The application discloses a membrane electrode performance test system. The membrane electrode performance test system comprises a load, a positive pole end plate, a negative pole end plate, a test electric pile and performance test equipment; the test electric pile internally comprises at least two membrane electrodes, and in the test electric pile, the membrane electrodes and bipolar plates arealternatively arranged; the positive pole end plate and the negative pole end plate are respectively connected with the bipolar plates positioned at both ends of the test electric pile, and the positive pole end plate and the negative pole end plate are connected by the load in the test system; and the performance test equipment is connected with the membrane electrodes in the test electric pile so as to test performance of the membrane electrodes in the test electric pile. The mode of alternatively arranging the membrane electrodes and the bipolar plates in the test electric pile can ensure that a stress condition of each membrane electrode in the test electric pile is basically consistent so as to ensure that test conditions of each membrane electrode are basically consistent and a performance comparison result of each membrane electrode is more reliable and accurate; and when the membrane electrodes in the test electric pile are tested, performance of various membrane electrodes canbe tested for once, so that efficiency of testing the performance of the membrane electrodes is improved.

The invention relates to a testing device and method of bending resistance of fiber materials by adopting a double-end clamping three-bending method. The testing device comprises an upper clamp holder, a lower clamp holder and a counter weight, wherein the upper clamp holder and the lower clamp holder are provided with jaws and used for clamping the upper end and the lower end of a specimen separately, and the counter weight is fixed to the lower end of the specimen and enables the specimen to bear the initial tension to straighten under the action of gravity. The lower clamp holder is drivenby a driving mechanism to move up and down, and during the upward movement of the lower clamp holder, the specimen clamped between the upper clamp holder and the lower clamp holder to form a three-bending shape. The upper clamp holder is connected with a force sensor. The testing device is simple in structure and convenient to operate, the testing method using the device greatly improves the accuracy of testing results, the testing efficiency and the possibility of practical popularization and application, and the problem of testing the bending resistance of the fiber materials is solved successfully.

The invention discloses an adjacent continuous tunnel group ventilation experiment device and a manufacture method. The experiment device comprises a left line upstream main tunnel, a left line downstream main tunnel, a right line upper stream main tunnel and a right line downstream main tunnel, wherein the four sections of main tunnels are bidirectional two-hole adjacent continuous tunnels whichare divided into left lines and right lines, and the middle parts of the four main tunnels are adjacent opening sections. According to the experiment device, four sections of main tunnels are combined, a longitudinal distance between each upstream tunnel and each downstream tunnel as well as a lateral distance between each left line tunnel and each right line tunnel can be regulated at will, so that an influence on tunnel group ventilation and pollution discharge by an adjacent tunnel interval, a tunnel group lateral distance, a tunnel temperature as well as a traffic flow and a speed in the tunnel is evaluated in the same tunnel ventilation experiment device, so that the manufacture cost of a model is saved, a manufacture period is shortened, in addition, an evaluation error is greatly lowered, and the accuracy of an evaluation result is guaranteed.

The invention provides a test box and a test method for light absorption and heating performance of a textile. The test box and the test method can solve the problem that a device and a test method capable of reasonably evaluating the heating performance of the textile under an illumination condition do not exist at present; the test box of the invention comprises a housing with an openable door on the front side; the housing is in transparency, an electric control box is mounted on the outer wall of the rear side of the housing; an objective table is arranged in the middle of the inner bottomface of the housing in the left-right direction. The objective table is provided with objective areas which are arranged in a bilateral symmetry mode. A xenon lamp is arranged right above the objective table; the xenon lamp is installed on a lamp holder capable of stretching up and down, the lower end of the lamp holder is fixed on the inner bottom surface of the housing, infrared temperature measuring guns are symmetrically installed on the left side wall and the right side wall in the housing, each infrared temperature measuring gun is provided with a temperature display screen, and measuring heads of the two infrared temperature measuring guns are respectively aligned with the objective areas on the same side; and a power plug, a main power switch, a xenon lamp switch and an infrared temperature measuring gun switch are arranged on the electric control box.

The invention discloses a detection system for air tightness of a valve. The system comprises a water tank, a water tank bracket, upper and lower pneumatic cylinders, a manipulator bracket, a plurality of manipulators and a manipulator transmission mechanism, wherein a water channel, a water inlet cylinder and a plurality of valve clamping fixtures are arranged in the water tank; the valve clamping fixtures are connected with the water inlet cylinder; the water tank bracket is fixedly arranged on the upper side of the water tank; the upper and lower pneumatic cylinders are arranged on the water tank bracket; the manipulator bracket is connected with piston rods of the upper and lower pneumatic cylinders; the manipulators are ranged on the manipulator bracket; each manipulator comprises a main shaft, a manipulator cylinder, a manipulator clamp and two clamping arms; the main shafts are provided with transmission gears; the manipulator cylinders are connected with the main shafts; the manipulator clamps are fixedly connected with the manipulator cylinders; the clamping arms are hinged in the manipulator clamps; one end of each clamping arm is hinged to the piston rod of the manipulator cylinder through a connecting arm respectively; the manipulator transmission mechanism comprises a transmission cylinder and a rack which is fixedly connected to the transmission cylinder; each transmission gear is engaged with the rack. The system can realize that the opening angle of a to-be-tested valve at each station is consistent to guarantee consistent testing condition of each to-be-tested valve and further achieve a more accurate test result.

The invention relates to a resistance test circuit and system, and during resistance test, a plurality of to-be-tested resistors are simultaneously connected by using an expansion device, and the to-be-tested resistors are sequentially connected in series through an internal connection cable of the expansion device. Under the control of the main controller, the constant current source device generates a current signal and transmits the current signal to the expansion device, and then the current signal sequentially flows into each resistor to be measured through the expansion device. Finally, the expansion device connects the two ends of each resistor to be tested to a voltage acquisition device through a test cable, voltage signals flowing through the resistors are acquired through the voltage acquisition device, and the resistance values of the resistors to be tested can be obtained by analyzing through the ohm theorem. According to the scheme, a plurality of to-be-tested resistors can be accessed at the same time for testing by utilizing the expansion device, and current signals flowing into the to-be-tested resistors are consistent, so that the test conditions of the to-be-tested resistors are consistent while the multi-path resistor test is realized, and the test reliability is relatively high.

The invention discloses a method for detecting the oil-well cement expansion rate, and belongs to the technical field of cement preparation. The method comprises the steps of slurrying, mould filling and curing and demoulding. The method is characterized by further comprising the steps of initial measurement, age period measurement and expansion rate calculation, wherein the curing and demoulding step comprises the process that a cement test block is put into a curing box, and demoulding is conducted after curing is conducted; the initial measurement step comprises the process that the direction of the cement test block subjected to demoulding is marked, then the cement test block is put into a measuring device subjected to zero correction, and the initial length L<0> of the cement test block is measured; the age period measurement step comprises the processes that the cement test block subjected to initial measurement is put into the curing box to be cured continuously, and the length L<x> of the corresponding age period is measured after the corresponding age period is achieved; the expansion rate calculation step comprises the process that the expansion rate is calculated according to the formula shown in the description, wherein 250 represents the effective length of the cement test block. According to the method for detecting the oil-well cement expansion rate, the expansion rate of the cement test block can be tested at different environmental temperatures, the testing data error can be reduced, and the measurement precision and accuracy of the expansion rate of the cement test block can be improved.

A metal material micro punching shear test and Brinell hardness combined measurement device comprises a testing machine, a tool die is installed on a base of the testing machine, and the tool die clamps a sample; a load sensor is installed at the output end of the testing machine and connected with a punch through a detachable connecting piece, and the punch is right opposite to a punched hole in the tool die. Position measuring devices are installed on the tool die and the punch or the base of the testing machine and the output end of the testing machine. The tool die comprises a lower boss, the lower boss is matched with an inner hole of a female die positioning sleeve, and a female die is arranged in the female die positioning sleeve and positioned through the female die positioning sleeve. An outer sleeve inner hole is matched with the outer circumference of the female die positioning sleeve; the upper boss is matched with an inner hole of the outer sleeve and detachably fixed to the outer sleeve and the lower boss through screws. The metal material micro punching shear test and Brinell hardness combined measurement device provided by the invention can improve the test precision and complete the Brinell hardness test at the same time.

The invention discloses a fixing device for an exposure test of an unmanned aerial vehicle in the natural environment. Firstly, the mounting angle of a carrier on a base is adjusted, and the carrier is enabled to be placed on the base flatly; after the carrier is placed flatly, a to-be-tested product is put in an accommodating cavity; and then, the angle of the carrier on the base is adjusted again, so that the carrier reaches the preset angle, sunlight can irradiate the to-be-tested product through an opening, and a sunlight aging test is conducted on the to-be-tested product conveniently. Meanwhile, a convection port communicating with the accommodating cavity is formed in the carrier, therefore stable convection exchange between airflow in the accommodating cavity and outside airflow is realized through the convection port in a testing process of the to-be-tested product, the humidity and temperature in the accommodating cavity are enabled to be balanced with the humidity and temperature in the environment, and test conditions of the to-be-tested product in the carrier are consistent with outdoor environment conditions, so that reliability of the exposure test is greatly improved.

The invention discloses a contrast test method for cooling effects of cooling pipes of different materials for an air cooler. According to the method, the test is performed on the same motor; all cooling pipes are arranged in a layer-to-layer tiled manner in equal distance from the end of the cooler; the cooling pipes of different materials have identical lengths, diameters and pipe wall thicknesses; when the cooling pipes are mounted, two cooling pipes are respectively taken from steel pipes, aluminum pipes and copper pipes; the quantity of the cooling pipes selected for the test each time is unequal from 1 to 15; the cooling pipes are uniformly arranged in the air cooler; and the residual kind of cooling pipes are totally arranged at the rest positions. Since the mean air outlet temperatures of air outlets of the cooling pipes are different due to different heat conductivity coefficients of the cooling pipes, the differences of actual heat dissipation abilities of the cooling pipes of different materials with different heat conductivity coefficients can be known by measuring the mean air outlet temperatures of air outlets of the cooling pipes of different materials.

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.

The fast detection device for microwave ceramics includes an opening parallel plate resonant cavity with step motor, a SCM, a driver for motor, a VNA, and a computer. This invention can detect target dielectric properties with no harm and high precision.

The invention discloses camera performance automatic test equipment and system and an operation method thereof, the camera performance automatic test equipment is used for carrying out performance test on a camera on a mobile terminal, the camera performance automatic test equipment comprises a rotary holder, a plurality of positioning devices and a mobile robot, the plurality of positioning devices are uniformly distributed on the rotary holder along the circumferential direction, the positioning device comprises an angle adjusting mechanism and a terminal clamp arranged on the angle adjusting mechanism. The angle adjusting mechanism is used for adjusting the angle of the terminal clamp so as to adjust the shooting angle of a camera of the mobile terminal; a rotary lifting mechanism is arranged at the top of the mobile robot, the rotary holder is mounted at the output end of the rotary lifting mechanism, and the rotary lifting mechanism can drive the rotary holder to rotate and lift; according to the invention, subjective and objective testing of the mobile terminal camera can be automatically carried out, testing conditions of all mobile terminals are ensured to be consistent, and testing precision and efficiency are improved.