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134results about How to "The test results are accurate" patented technology

Test device and test method for testing kinetic shear characteristics between pipe piles and grouting soil bodies

The invention discloses a test device and a test method for testing kinetic shear characteristics between pipe piles and grouting soil bodies. The test device comprises a vibration platform, a pipe pile model test box, a loading mechanism and a monitoring system, wherein the pipe pile model test box comprises a steel bottom plate, stacked steel frames, a limiting mechanism, pipe piles arranged in the steel frames, and a sandy oil body; guide chutes are formed between the steel frames; balls are arranged on the guide chutes; hard soil is spread on the steel bottom plate; the part between the pipe piles and the sandy oil body is filled with cement paste; sealing films are arranged on the inner walls of the steel frames; and the monitoring system comprises a displacement sensor, a strain rosette group arranged on the outer surfaces of the pipe piles, and a pressure box arranged in the sandy oil body. According to the device and the method disclosed by the invention, the box wall boundary influence can be well eliminated, the problem that a scale effect and a test model similarity ratio relationship are difficult to determine is solved, the test results are accurate, reasonable and reliable, and reliable basic data is provided for theoretical analysis and engineering practice.
Owner:GUANGZHOU INSTITUTE OF BUILDING SCIENCE CO LTD +1

Test system of mobile phone antenna

The invention discloses a test system of a mobile phone antenna. The test system comprises a test rotary table, a loudspeaker antenna, an integrative tester, a frequency spectrum tester, a signal distributor, a radiofrequency signal attenuator, a data acquisition apparatus and a display. The test rotary table and the loudspeaker antenna are positioned in a microwave darkroom. The integrative tester, the frequency spectrum tester, the signal distributor, the radiofrequency signal attenuator, the data acquisition apparatus and the display are positioned outside the microwave darkroom. A mobile phone is placed on the test rotary table and is connected with the signal distributor. The loudspeaker antenna and the integrative tester are connected with the frequency spectrum tester. The integrative tester is connected with the display through the data collector, and is connected with the signal distributor through the radiofrequency signal attenuator. The signal distributor is connected with the frequency spectrum tester. According to the invention, through forming a set of closed loop test system with the loudspeaker antenna, the integrative tester, the frequency spectrum tester, the radiofrequency signal attenuator and the signal distributor, influence of signal attenuation and radiation on a test is reduced, and a test result is accurate.
Owner:HUIZHOU TCL MOBILE COMM CO LTD

Fault location method for vibration and noise abnormality of GIS combined electrical appliance in substation

The invention discloses a fault location method for vibration and noise abnormality of a GIS combined electrical appliance in a substation. A GIS combined electrical appliance, a vibration test analyzer and a noise test analyzer are arranged. The GIS combined electrical appliance includes a circuit breaker, a bus, a disconnecting switch, a voltage transformer, a current transformer, and a lightning arrester. The invention provides a method for testing the vibration and noise of the GIS combined electrical appliance in a substation, thereby realizing accurate and comprehensive test result and providing the systematic and scientific test results for the production, debugging, operation and maintenance personnel. A method for vibration and noise fault analysis and location is also put forwardby combining the test method, so that the vibration and noise faults can be analyzed according to the test results to find out coherence of the key factors causing the problems and thus the fault location is realized. The fault location method has the high innovation; the blank in the field related with the vibration and noise of the current GIS combined electrical equipment is filed; and the safe and stable operation of the 110-kV substation equipment is guaranteed effectively and the high-efficiency maintenance is realized.
Owner:国网山东省电力公司昌乐县供电公司 +1

Method and device for determining refrigerant quantity of refrigerating system

ActiveCN107504732AThe test results are accurateLow costRefrigeration safety arrangementSystem requirementsElectronic expansion valve
The invention discloses a method for determining refrigerant quantity of a refrigerating system. The method comprises the following steps: 1, pre-storing a correspondence table of opening degree data of a specific electronic expansion valve and the temperature of a winding in the refrigerating system, and meanwhile, pre-storing a relation table of air exhausting temperature and winding temperature in the refrigerating system; 2, picking an opening degree of the special electronic expansion valve, and determining whether the air exhausting temperature is within the preset range, and entering step 3 if the air exhausting temperature is within the preset range; and 3, determining whether the motor winding temperature is within the preset range; if so, determining that refrigerants meet the system requirement; and if not so, determining that the refrigerants are insufficient, and prompting that the refrigerants are insufficient by the system. The invention also discloses a device for determining the refrigerant quantity of the refrigerating system. With the adoption of the method and the device, the fault determining is replaced by the refrigerating system refrigerant quantity determining; and the method and the device are of practical significance on repair and the system reliability improvement.
Owner:SICHUAN CHANGHONG ELECTRIC CO LTD

Method and device for testing characteristics of thin film transistor on array substrate

InactiveCN102456592AAvoid time stress effectsThe test results are accurateSemiconductor/solid-state device testing/measurementStatic indicating devicesThin-film-transistor liquid-crystal displayLiquid-crystal display
The invention discloses a method and a device for testing the characteristics of a thin film transistor on an array substrate, and relates to the field of liquid crystal displays. The method and the device aim to improve the accuracy of test results. The method for testing the characteristics of the thin film transistor on the array substrate comprises the following steps of: determining the period of a gate test voltage signal and a drain-source test voltage signal which correspond to the characteristic to be tested of the thin film transistor and signal amplitude in each period, wherein both the gate test voltage signal and the drain-source test voltage signal are alternating current voltage signals; applying the gate test voltage signal to the gate of the thin film transistor, and applying the drain-source test voltage signal between the source and drain of the thin film transistor; and acquiring an output signal, which corresponds to the characteristic to be tested, of the thin film transistor. The method and the device can be used for the design verification and quality verification processes of a thin film transistor liquid crystal display.
Owner:BEIJING BOE OPTOELECTRONCIS TECH CO LTD

Test apparatus and test method of stiffness of glass fiber mat and cloth

The invention relates to a test apparatus and test method of the stiffness of a glass fiber mat and cloth. The test apparatus comprises a pedestal, a support, an up-and-down movement platform, a sample stage and a slide rail. The test method comprises the following steps: 1, cutting the glass fiber mat and cloth to be tested according to a prescribed dimension to form a sample to be tested, and carrying out standardized pretreatment on the sample to be tested; 2, tiling the pretreated sample to be tested on the sample stage, pushing the sample to be tested to forward move for a certain distance, and upward moving the up-and-down movement platform to make the upper surface of a horizontal scale just touch the falling edge of the sample to be tested; and 3, measuring the horizontal distance of the sample to be tested through the horizontal scale, measuring the falling distance of the sample to be tested through a height scale, and calculating the stiffness coefficient of the glass fiber mat and cloth sample to be tested, which is a ratio of the horizontal distance of the sample to be tested to the falling distance of the sample to be tested. The test method has the advantages of simple and effective process, scientific test principle and high test precision, and the test apparatus has the advantages of simplicity, durability, accurate test effect, convenience, and high practicality.
Owner:JUSHI GRP CO

Grid access simulation test system for inverter

InactiveCN105182796AThe test results are accurateOvercoming modeling inaccuraciesData processing applicationsSimulator controlReal-time simulationPower grid
The invention relates to a grid access simulation test technology for an inverter, and discloses a grid access simulation test system for an inverter. The grid access simulation test system for an inverter comprises a host computer simulation subsystem, a digital simulation subsystem, a physical simulation subsystem, an inverter and an interface subsystem, wherein the host computer simulation subsystem is connected with the digital simulation subsystem; the digital simulation subsystem is connected with the inverter through the interface subsystem; the inverter is also connected with the physical simulation subsystem; the host computer simulation subsystem is used for monitoring an on-line monitoring simulation test process; the digital simulation subsystem is used for performing digital real time simulation of a power grid according to a power grid model; the physical simulation subsystem is used for performing physical simulation of power generation equipment according to a model for the power generation equipment; and the interface subsystem is used for performing power conversion of interactive signals between the digital simulation subsystem and the inverter. Therefore, the inverter can be tested more comprehensively, and at the same time the test environment gets closer to the actual environment and the test result is more accurate.
Owner:POWER GRID TECH RES CENT CHINA SOUTHERN POWER GRID +2

Single-crack rock equivalent effective stress coefficient testing device and testing method

The invention relates to a single-crack rock equivalent effective stress coefficient testing device and testing method. a triaxial pressure chamber of the testing device is provided with a testing cavity; an axial loading cylinder of an axial pressure loading mechanism is arranged on the top of the triaxial pressure chamber; the internal of the axial loading cylinder communicates with an axial pressure servo pump; the telescoping end of the axial loading cylinder enters the testing cavity; a confining pressure servo pump of a confining pressure loading mechanism communicates with the testing cavity; an upper pressure head and a lower pressure head are vertically arranged in the testing cavity in an opposite manner; the upper pressure head is arranged right under the telescoping end of theaxial loading cylinder and provided with an upper fluid pressure pipeline; the lower pressure head is fixedly arranged at the bottom of the testing cavity and provided with a lower fluid pressure pipeline; the upper and lower fluid pressure pipelines communicate with a fluid pressure servo pump; and a to-be-tested rock having a single crack is placed between the upper pressure head and the lower pressure head. Thus, testing results can be more accurate.
Owner:INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI

Disposable soft connecting band collection container and anti-freezing vacuum blood taking needle of bleeding opening

The invention belongs to the technical field of medical instruments, and relates to a disposable soft connecting band collection container and an anti-freezing vacuum blood taking needle of a bleeding opening. The disposable soft connecting band collection container is formed in the following mode that: a biological product anticoagulant coating layer is arranged on an inner cavity wall of a circular connector; one end of the connector is provided with a blood taking plastic duct; a vacuum valve is placed on the plastic duct; the other end of the plastic duct is provided with the circular connector; the inner cavity wall of the circular connector is provided with the biological product anticoagulant coating layer; one end of the connector is provided with a venous blood taking needle, while the other end is provided with a blood collection sample bottle needle; the blood collection sample bottle needle is connected with a blood collection sample bottle cap; the blood collection sample bottle cap is connected with a rubber plug; the rubber plug is connected with a blood collection sample bottle; and one side on the blood collection sample bottle close to the blood collection sample bottle cap is provided with a secondary bleeding opening. The disposable soft connecting band collection container and the anti-freezing vacuum blood taking needle of the bleeding opening can ensure that a blood sample generates no cruor and hemolysis so as to ensure the accuracy of the test result. The blood dosage during the test can be controlled flexibly so as to ensure repeated tests at any time or the addition of new testing items.
Owner:天津百新生物技术研发有限公司

Oil level monitoring and warning device for oil conservator special for transformer

The invention relates to an oil level monitoring and warning device for an oil conservator special for a transformer. The oil level monitoring and warning device is mainly characterized by comprising a light source emitter, a light source receiver, a photovoltaic conversion unit and a warning unit, wherein the light source emitter and the light source receiver are arranged in the oil conservator special for the transformer, the photovoltaic conversion unit is connected with the light source receiver, and the warning unit is connected with the photovoltaic conversion unit; the light source emitter is installed on the inner wall of the oil conservator and located above the oil level in the oil conservator; the light source receiver is installed on the inner wall, opposite to the light source emitter, of the oil conservator and located below the oil level in the oil conservator; the light source emitter irradiates a light beam of an emitting point to the light source receiver on the other side of the oil conservator at a certain angle. The oil level monitoring and warning device is reasonable in design; according to the refraction principle of light on an interface between gas and oil in the transformer, the oil level of the oil conservator in the transformer is reflected; meanwhile, according to the photovoltaic conversion principle, optical signals are converted into electric signals, and then the electric signals are output, so that the warning function is achieved; the oil level monitoring and warning device has the advantages of being safe and reliable in detection, accurate in testing result, easy and convenient to operate, high in anti-interference capacity and the like.
Owner:STATE GRID CORP OF CHINA +1

System and method for automatically and quantitatively analyzing coal rock ray plate fracture

The invention discloses a system and a method for automatically and quantitatively analyzing a coal rock ray plate fracture, relates to the technical field of development of coal energy sources and aims at providing a system and a method for automatically and quantitatively analyzing the coal rock ray plate fracture which is simple to operate, quick in analysis and accurate in test result. The system comprises a microscope automatic platform control system and a microscopic image analyzing system. The method comprises the steps of connecting the microscope automatic platform control system and the microscopic image analyzing system to a fluorescence microscope; adjusting the fluorescence microscope; setting calibration; panoramically scanning and collecting images; setting image parameters and performing statistical processing and analysis on the coal rock ray plate fracture. According to the system and the method for automatically and quantitatively analyzing the coal rock ray plate fracture, the microscope automatic platform control system and the microscopic image analyzing system are connected to the fluorescence microscope, so that the testing results are more accurate; the situation of recounting the fracture is avoided. The method is simple to operate and quick in analysis, manual time consumption is reduced, analysis projects are increased, personal errors are eliminated and the test results are abundant and accurate.
Owner:CHINA UNIV OF GEOSCIENCES (BEIJING)

Method and device for precisely measuring volume of volume metering pipe

InactiveCN104132706AThe test results are accurateWide range of choicesContainer/cavity capacity measurementPistonInjector
The invention discloses a method and a device for precisely measuring volume of a volume metering pipe. A step motor of the device is in rigid connection with a piston of an injector through a lead screw, the injector is provided with a motor initial-position optocoupler, and an outlet of the injector is connected with a second electromagnetic valve. The second electromagnetic valve is connected with a reagent barrel and one end of a first T-shaped joint, the other end of the first T-shaped joint is connected with the volume metering pipe, a straight-angle end of the first T-shaped joint is connected with an inlet end of a first electromagnetic valve, and an outlet end of the first electromagnetic valve is connected with an air filter; a first liquid-level detection optocoupler and a second liquid-level detection optocoupler are arranged at the top end and the bottom end of the volume metering pipe respectively, the bottom end of the volume metering pipe is connected with a public end of a third electromagnetic valve, the third electromagnetic valve is connected with a second T-shaped joint and connected with a high-level end of a negative-pressure chamber, a low-level end of the negative-pressure chamber is connected with a liquid pump, the liquid pump is connected with the second T-shaped joint, and the second T-shaped joint is connected with a waste liquid barrel. By the method and the device for precisely measuring volume, precise and reliable measurement can be realized.
Owner:SHENZHEN DYMIND BIOTECH

Thermally-stimulated current tester

The invention relates to a thermally-stimulated current tester, which comprises a vacuum chamber, a micro galvanometer and a temperature control device, wherein the vacuum chamber comprises an upper electrode capable of being adjusted up and down, a lower electrode with a sample reservoir, a liquid nitrogen container and a heater; the sample reservoir is arranged above the lower electrode; the liquid nitrogen container is arranged at the periphery of the lower electrode; the heater is arranged in the center inside the lower electrode; the lower electrode is arranged on an insulated seat; the upper electrode and the lower electrode are connected to the micro galvanometer; a temperature sensor is arranged at the sample reservoir; and the heater and the temperature sensor are respectively connected to the temperature control device. The thermally-stimulated current tester is high in sensitivity and accurate in test result, effectively solves the problem that a self-assembled device cannot meet search and test requirements and the like of new materials, perfects experimental methods and measures of a thermally-stimulated current technology and has wide application prospects in the fields of researches on dielectric materials, insulation materials, semiconductor photoelectric materials and electret materials and measurement of micro-current.
Owner:HANGZHOU DIANZI UNIV

Fragile material tension and torsion test method and test auxiliary device

ActiveCN104535435AAvoid breakingThe test results are accurateMaterial strength using steady torsional forcesEngineeringThreaded rod
The invention discloses an auxiliary device and a method of fragile material tension and torsion test. The auxiliary device comprises a clamping protective sleeve and a protective sleeve centering device. The clamping protective sleeve is a cylindrical sleeve. the protective sleeve centering device comprises a support frame, an upper centering block, a threaded rod and a handle. The support frame comprises a pedestal and a column erected on the pedestal. A threaded hole penetrating the upper centering block is disposed on the upper centering block; the threaded rod passes through the threaded hole on the upper centering block, and also passes through a threaded hole on the column of the support frame. The handle is mounted at the upper end part of the threaded rod. A V-shaped long groove is disposed on the upper surface of the pedestal of the support frame and extends across the upper surface of the pedestal, and a V-shaped long groove is disposed at a corresponding position on the lower surface of the upper centering block. The auxiliary device and the test method effectively prevent a tension and torsion sample made of a fragile material from directly contacting antiskid teeth of a chuck of a testing machine, and thus prevent the sample from being crushed by the antiskid teeth. The device is simple in structure; the test method is easy to perform; no additional reconstruction of the testing machine is needed; and the cost is low.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Clearance fluid-loss test method based on oil-well pump performance testing device

The invention discloses a clearance fluid-loss test method based on an oil-well pump performance testing device. The clearance fluid-loss test method based on the oil-well pump performance testing device includes that (a), an oil-well pump without installation of a plunger assembly is flatwise placed on a support; (b), a group of cylindrical steel ejecting rods capable of limiting the plunger assembly to be positioned at a test position is installed in a pump cylinder; (c), the plunger assembly matched with the pump cylinder is installed; (d), a pressure test joint is screwed up tightly on a pump cylinder coupling hoop; (e), a low-pressure liquid charging pump is started to charge the pump cylinder until the pump cylinder is full of diesel oil, and meanwhile the plunger assembly is also delivered to the positions of the ejecting rods by the diesel oil in a pressurized mode; (f), the low-pressure liquid charging pump is shut down, a high-pressure test pump is started, the diesel oil is continued to be filled into the pump cylinder, and meanwhile, the rising situation of a gauge hand of a pressure gauge is closely watched; and (g), when the gauge hand rises to a fluid-loss test pressure and the quantity of the diesel oil leaked from an outlet of the lower end of the pump cylinder is stable, a measuring pot is used to receive the leaked and lost diesel oil for a minute, and the quantity of the diesel oil in the measuring pot is measured. The clearance fluid-loss test method based on the oil-well pump performance testing device can be used for measuring the clearance fluid-loss quantity of the oil-well pump, and is accurate in test result, simple in test steps, speedy in test, and reduced in test cost.
Owner:欧阳才伟
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