88results about How to "The test method is accurate" patented technology

The invention relates to a super-precision trans-scale in-situ nanometer indentation marking test system which integrates driving, loading, detecting and micro-nanometer dynamic performance tests, super-precision marking processing and in-situ observation into a whole. The system mainly comprises an objective table, a regulation mechanism, a detection unit, a precise pressed-into driving unit, a detection unit of load signals and displacement signals and a high-resolution digital microscopic imaging system, wherein the objective table is precisely positioned along the directions of the X axis and the Y axis; the regulation mechanism and the precise pressed-into driving unit are in the direction of the Z axis and are assembled on a base; the high-resolution digital microscopic imaging system is used for observing the deforming and damaging conditions of the material in the storing and testing process; the objective table as well as the regulation mechanism and the precise pressed-into driving unit in the direction of the Z axis are assembled on a base; the high-resolution digital microscopic imaging system is arranged on the objective table; a precise dynamic sensor detecting the pressure of a diamond tool head pressed into a material and a sensor I detecting the precise displacement of the objective table in the directions of the X axis and the Y axis are arranged on the objective table; and a sensor II used for detecting the precise displacement of a diamond tool head in the direction of the Z axis of pressed-into depth is arranged on the base by a support I.

The invention relates to a micron-nano scale in-situ nano indentation and scratching test system which integrates driving, precise loading and signal detection, micron-nano scale mechanics performance testing, ultraprecise scratching processing and high resolution in-situ observing as one. The system is mainly composed of a precise positioning platform at X-axis and Y-axis directions, a precise linear positioning platform at Z-axis direction, a precise indentation driving unit, a load signal and displacement signal detection unit and a high resolution digital microscopic imaging system for observing and storing material deformation and damage conditions in the test process. The precise positioning platform at the X-axis and Y-axis directions is assembled on a base, the precise linear positioning platform at the Z-axis direction is assembled on a side plate, the precise indentation driving unit, a precise mechanical sensor for detecting the indentation material pressure of a diamond tool head and a precise displacement sensor for detecting the indentation depth of the diamond tool head to along the Z-axis direction are assembled on the precise linear positioning platform at the Z-axis direction, and the high resolution digital microscopic imaging system is assembled on a beam.

The invention relates to an analog device for on-line monitoring of dissolving gas in transformer oil and a detection method thereof. The analog device comprises a hydraulic circulatory system, a fuel tank temperature control system and a gas collection detection system; the hydraulic circulatory system comprises a fuel tank and an oil pump which connected through a circulation pipeline, a gas inlet port is arranged on the circulation pipeline, and a flow control valve is also provided; the fuel tank temperature control system comprises a heating pipe and a temperature sensor arranged in the fuel tank, a temperature controller respectively connected with the heating pipe and the temperature sensor; the gas collection detection system comprises at least one group of a gate valve, an air chamber and a gas detector which are connected through the pipeline in order, the gate valve is connected with the fuel tank through the pipeline, an oil gas separating membrane is arranged between the gate valve and the air chamber, and the analog device detects oil gas separating effects by changing difficult conditions to screen the optimal condition. Compared with the prior art, the analog device has the advantages of simple structure, convenient operation, and accurate simulation result.

The invention relates to a steel solidus-liquidus temperature measurement method, and belongs to the technical field of metal material detection. The specific method comprises sample preparation, equipment calibration, experiment testing, and result analysis so as to complete the measurement. The results show that: an extrapolated onset temperature is consistent with a thermodynamic equilibrium temperature, such that a temperature corresponding to an extrapolated onset point of the first endothermic peak on a differential thermal curve during sample heating melting is judged as a liquidus temperature TL, and a temperature corresponding to an extrapolated onset point of the first exothermic peak on a differential thermal curve during sample cooling solidification is judged as a solidus temperature Ts. The measurement method has advantages of rapidness, accuracy, high automation degree, and good reproducibility.

The invention aims at providing an electric heating tube testing device and method. The electric heating tube testing device and method are used for comprehensively and reliably testing the safety performance of electric heating tubes. The electric heating tube testing device comprises a metal testing barrel with a movable barrel cover. The upper portion of the testing barrel is connected with a liquid inlet pipe and an air exhaust pipe. The liquid inlet pipe is provided with a liquid inlet valve. The air exhaust pipe is provided with an air exhaust valve. The lower portion of the testing barrel is provided with a liquid outlet pipe and an air inlet pipe. The liquid outlet pipe is provided with a liquid outlet valve. The air inlet pipe is provided with an air inlet valve. The testing barrel is connected with an air pressure gauge, a hydraulic pressure gauge and a temperature gauge through pipelines. The barrel body of the testing barrel is connected with an earth terminal through a wire. The testing barrel is provided with a testing terminal communicated with the interior and the exterior of the testing barrel. The electric heating tube testing device is applicable to testing of various electric heating tubes, the electric heating tube testing method is convenient to implement, reliable and reliable, and factory testing of the electric heating tubes can be achieved.

The invention relates to a method for the on-line detection of coagulation bath concentration in the production of polyacrylonitrile strands for carbon fibers, which comprises the following steps: 1) preparing a dimethyl sulfoxide standard solution; 2) manufacturing a standard curve equation; 3) connecting devices; 4) carrying out on-line detection; and 5) calculating the concentration. The invention solves the technical problems that the existing coagulation bath concentration detecting method is time-consuming, the detection result is inaccurate and the on-line detection can not be realized. Besides, the invention is beneficial to improving the timeliness, the dynamic nature and the accuracy of the concentration control of dimethyl sulfoxide in the coagulation bath. The detecting method is fast, accurate and visual, and is suitable for automatic production.

The invention discloses a method for measuring bacitracin and the content of the preparation thereof by the turbidity method, and the method contains the following steps: the preparation of standard solution, the preparation of test solution, the preparation of test organism suspension, the content measurement, etc. The antibiotics-microbial test and multi-dose turbidity method of the invention are adopted for measuring the bacitracin and the content of the preparation thereof, thus the test method is accurate and effective and has low cost, and test results can truly reflect antibacterial activity of the bacitracin and the preparation thereof; the method has stronger practicality and operability in the production and the quality control of the drug and the preparation thereof.

The invention belongs to the technical field of water environment chemical analysis, and particularly relates to a local coulomb method for measuring biochemically degradable organic matters in a water body. According to the method, uniquely a fastest voltage reduction point is selected as a cut-off point for collecting a voltage; the cut-off point is easy to find, and the measurement time can begreatly shortened, so that the operation efficiency is improved; by means of the local coulomb method of the cut-off point selection method, the linear correlation between the value of oxygen consumption BOMQ1 in a measurement result and the concentration of a GGA standard solution for culture of electricigens is better, the more scientific, reasonable and accurate test method is provided for measuring the biochemically degradable organic matters in the water body by utilizing a microbial fuel cell, and new idea and direction are provided for scientific control of water environment pollution;and the method has great popularization values and wide application prospects.

The present invention discloses an extraction method for of a threshold voltage of MOSFET on the basis of a drain control generation current. The extraction method provided by the invention comprise: a channel inversion layer is located in the inversion state through adoption of fixation of large gate voltage VG, and at the same time a drain voltage VD is scanned to obtain a curve of a drain control generation current IDC; and when the drain voltage VD is increased up to allow a channel at the edge of the drain end to start the occurrence of exhaustion, the IDC curve is beginning to rapidly increase and turns up a peak, and the point of abrupt change is just a difference of a gate voltage and the drain voltage with respect to a critical point or a turning point inverting up to exhaustion, namely the threshold voltage VT. An accurate, simple and fast test method of MOSFET is provided by the invention. Because the curve presents an abrupt change, the drain voltage point with respect to the turning point inverting up to exhaustion may be easier observed, so that the man-made observation error may be avoided; the operation of obtaining a threshold voltage is simple; and the measurement is fast, and a direct current test is only needed.

The invention relates to a method for rapidly evaluating the performance of a reverse osmosis antisludging agent by determining the pH value of a solution, comprising the following steps of: (1) adding a CaCl2 solution the concentration of which is C1 and the volume of which is V1 and an antisludging agent the dosage of which is W to a container; (2) making the container airtight at constant temperature under stirring, then dropwise adding a NaHCO3 solution the concentration of which is C2 and the volume of which is V2 and marking as the first time; (3) recording the pH value of the solution after t min, simultaneously dropwise adding the NaHCO3 solution the concentration of which is C2 and the volume of which is V2 and marking as the second time; (4) repeating the step (3) until the pH value of the solution falls, wherein the adding time of the NaHCO3 solution sums to n, and recording the pH value of the solution when the NaHCO3 solution is added for the (n-1) time and the volume (n-1)V2 of the accumulatively consumed NaHCO3 solution; and (5) working out the supersaturation S of CaCO3 in the solution when the NaHCO3 solution is added for the (n-1) time, and judging the performance of the antisludging agent according to the S magnitude. The method is rapid and accurate, has simple test condition and is easy to operate.

The invention belongs to the technical field of titanium dioxide performance testing, and discloses a method for rapidly testing weather resistance of titanium dioxide and application. The method comprises the following steps of (1) uniformly mixing materials for preparing a test sample wafer, wherein the material formula comprises the following components in parts by weight: 100 parts of polyvinyl chloride resins, 5-10 parts of titanium dioxide, 3-10 parts of lead salt stabilizers, 2-8 parts of chlorinated polyethylene, 1-3 parts of plasticizers, 3-20 parts of calcium carbonate, 1-3 parts of ACR-401 and 0.1-1 part of paraffin; (2) processing a mixture obtained in the step (1) into a sample wafer by adopting an extruder; (3) cutting the mixture obtained in the step (2) into a test sample wafer, and testing color values L0, a0 and b0; (4) sealing the test sample wafer in water, isolating air and carrying out sun exposure for 2-48 hours, and testing color values L1, a1 and b1; and (5) computing a color difference before and after the sun exposure, and judging the weather resistance of the titanium dioxide. According to the method, the weather resistance of the titanium dioxide can be rapidly, efficiently and accurately detected.

The invention discloses a device for dynamically testing fabric quality. The device comprises a frame, clamps are arranged on two sidewalls of the frame, two brackets are arranged between two sidewalls of the frame, and the top of each bracket is rotatably connected with a cam; the lower part of the cam is rotatably connected with the bracket through a wheel shaft, one end of the wheel shaft extends to outside of the bracket and bonded with a transmission wheel; a motor is arranged on the frame between two brackets, a driving wheel is bonded on the output shaft of the motor, and the driving wheel is in transmission connection with two transmission wheels through transmission belts; the motor drives two cams to synchronously swing by controlling the forward rotation and reverse rotation through a cam swing control device. By simulating the use on the fabric by the hip, the elbows and the knees when the human body wears the fabric, the fabric performance and the sewing quality conditionof the fabric and the sewed fabric under the tension, the torsion, the friction and like coupling dynamics effects are synchronously detected. The invention further discloses a method for dynamicallytesting the fabric quality by adopting the device.

The invention belongs to the technical field of power distribution tests, and particularly relates to a comprehensive test device and method for a primary power distribution device, the comprehensive test device comprises a control unit, a power supply unit and a load unit, and the control unit comprises a KVM assembly, a test host and an interface conditioning box which are in communication connection in sequence; the interface conditioning box is electrically connected with a signal interface box used for providing a signal acquisition interface and a power switching device used for supporting common loading of a plurality of channels, and the output end of the power switching device is electrically connected with a power interface box used for providing a power supply/load interface. According to the invention, functions and performance of a tested product can be comprehensively tested, whether each test item is qualified or not can be rapidly judged, the test mode is efficient and accurate, the safety and reliability of use of a primary power distribution device are better guaranteed, the direct installation of a fault product is avoided, the system test efficiency and quality of aircraft assembly are improved, and the aircraft accident rate is reduced.

The invention relates to a split type micro extensometer for measuring tensile deformation of a small in-situ tension tester and belongs to the technical field of precise sensors and precise instruments. Fixing clips are close to the side surface of a sample, clamping clips are fixedly connected with the fixing clips through rotary shafts, the clamping clips provided with cutting edges clamp the sample and are tightened with the fixing clips through rubber bands, and a capacitive displacement sensor and a measuring plate fixing rack are connected with the fixing clips through screws. The wholeextensometer is very compact in size due to adoption of tiny sensing elements and can be applied to micro tension samples with 8-20 mm long gauge length sections, and the gauge length sections of thesamples cannot be shielded and in-situ imaging of the samples in the experiment process is not affected by the aid of the split type structure. The extensometer has the advantages as follows: the extensometer is compact in structure, small in size, high in precision and particularly applicable to deformation measurement of in-situ tension tests for material micro-mechanical properties under a scanning electron microscope.

The invention relates to a transformer on-load switch testing system and method. The system comprises an upper computer and a lower computer. The upper computer comprises a test interface module, a query module, a storage module, a data processing module, and an upper computer USB module. The lower computer comprises an ARM processor, a lower computer USB module, a power supply module, a memory, an LCD display, a keyboard, a signal processing circuit, a sensor access module, a synchronous dynamic random access memory, and a NorFlash. According to the method, the tests of the upper computer and the lower computer are employed, the lower computer can communicate with the upper computer through the lower computer USB module, the upper computer and the lower computer carry out analysis processing and displaying on a signal so as to judge the performance of a high voltage switch, and the normal operation of a grid is protected. The transformer on-load switch testing system and method have the advantages of a reasonable conception and simple and fast testing, through the simultaneous comparison of a DC waveform and an AC wave form and mutual reference, a more accurate testing result is given, and the testing result is more comprehensive.

The invention provides an efficient flame-retardant master batch for high-density polyethylene. The efficient flame-retardant master batch is prepared from components through a double-screw extruder,and the components comprise, by weight, 28-34 parts of a powdery polyolefin elastomer, 65-70 parts of a compound flame retardant, 0.5-1 part of an auxiliary agent and 0.5-1 part of a coupling agent; the coupling agent is an aluminate coupling agent; and the auxiliary agent is an antioxidant. According to the efficient flame-retardant master batch for the high-density polyethylene, the flame retardant adopted in the formula is a compound flame retardant of decabromodiphenyl ethane and antimonous oxide, the bromine-antimony ratio is 1: 1.055, and the proportion is accurate and reasonable; and all the components in the formula have a synergistic effect, so that a very good flame-retardant effect can be achieved under the condition of a very small addition amount. The efficient flame-retardantmaster batch is applied to spinning and film blowing production of HDPE materials under the condition of hardly influencing mechanical properties; and the preparation method is simple, the used equipment is a common water brace twin-screw extruder with very wide applicability, and large-scale production is easy to realize.