44 results about "Test double" patented technology

The invention relates to a method for testing double segments Zinc oxide arrester insulation state, which belongs to the field of power supply establishment test technology. According to the invention, the first grounded ammeter is connected in series with Zinc oxide arrester lower segment, the middle connecting part between the two segments is connected with direct current high voltage test instrument and the second ammeter, pressurizing from the middle connecting part of the two arrester, at first observating the first ammeter, adjusting for obtaining the leak current valve of the arrester; then adjusting the direct current high voltage test instrument, reading current valves of the first ammeter and the second ammeter, obtaining the leak current valve of the upper segment of the arrester from the difference of the two readings. The method of the invention can avoid removing high voltage down-lead, without ascent, reduce the labour intensity and working danger, at the same time avoid the bother of wire change in test, and improve working efficiency. In addition, because the middle segment wire of the double segments Zinc oxide arrester is lower than the top of the upper segment, it is safe and simple to test wire with a certain included angle.

The invention discloses a vibration fault diagnosis method for a doubly-fed wind turbine. The method comprises the steps: extracting the fault characteristics of the bearing by performing spectrum andenvelope spectrum analysis on the vibration data, and determining whether the vibration fault is caused by a mechanical fault if the vibration fault of a tested double-fed wind turbine occurs; determining whether a three-phase unbalance occurs by extracting a voltage and current signal during the operation of the turbine stator, and determining whether the vibration fault is caused by an electrical fault; performing dielectric loss factor and capacitance measurement on the stator windings to determine whether the three-phase unbalance is caused by an insulation degradation if the electrical fault occurs; and stopping the turbine and performing a shock waveform test to determine the fault phase of the insulation degradation of the tested turbine stator if the insulation degradation occurs.The method comprehensively diagnose the vibration fault by combining the vibration signal with the electrical signal, so that the defects and deficiencies of the single monitoring signal are overcome, the accuracy of the diagnosis result is improved, the diagnosis of the phase of the insulation fault of the stator can be realized, and the difficulty of the repairing and maintaining the wind turbine can be reduced.

The invention relates to a method for testing double-direction torque of an eddy current dynamometer. In the method, a pull pressure sensor with a strain chip type structure is subjected to stressing calibration through analog-to-digital conversion to generate the double-direction torque according to different positive and negative voltages generated by the tensile force and the pressure of the pull pressure sensor, and the rotation direction of a prime motor is determined through positive and negative torque voltages according to a forward zero point, forward fullness, a reverse zero point and reverse fullness of the calibration, so that respective calibration data is called without any improvement on mechanical structures; the test method is simple and practical and is extremely high incost performance; in a test for measuring the torque of a motor or an engine, the problem that measurement accuracy is drifted due to incapability of zeroing of a mechanical position generated by applying double-direction force to a swing body measured by the eddy current dynamometer during torque direction variation of an S-shaped pull pressure sensor in the prior art is solved; and when new energy source power racks such as the motor and the like are tested, the positive and negative rotation of the motor can be automatically determined according to measured different positive and negative torque, so that measurement accuracy and testing efficiency are effectively improved.

A method for testing a double-kernel browser comprises the steps that a preset URL address is input into a location bar of the browser through an automatic testing tool based on a UI; according to webpage information and preset selection logic which correspond to the URL address, a kernel is selected by the browser so that the webpage information corresponding to the URL address can be displayed; the currently-used kernel of the browser is obtained by the browser through a preset standard control and kernel information is displayed through the standard control; the kernel information displayed by the standard control on the browser is obtained through the automatic testing tool based on the UI; the obtained kernel information is compared with preset expected kernel information corresponding to the URL address, so that a log is generated. The invention further provides a system for testing the double-kernel browser. According to the method and system for testing the double-kernel browser, the invisible logic is displayed through the standard control on the UI so that the current kernel can be judged by the automatic testing tool based on the UI according to the attribute of the standard control, an automatic test can be conducted, the testing time can be shortened, and the testing efficiency can be improved.

The invention discloses a single-pivot double row rolling bearing supporting type rotor comprehensive performance experiment device comprising a variable frequency motor, an experiment main shaft, two bearing pedestals, a loading bracket, double rows of rolling bearings, an axial loading device and a radial loading device. The two bearing pedestals and the variable frequency motor are installed on an experiment table pedestal. The experiment main shaft is supported on the two bearing pedestals and connected with the variable frequency motor. The axial loading device and the radial loading device are arranged between the two bearing pedestals. The experiment main shaft is provided with the double rows of rolling bearings which are installed in a bearing sleeve. The bearing sleeve is installed on the experiment table pedestal. A temperature sensor and an acceleration vibration sensor are installed on the bearing sleeve. Axial loading and radial loading are performed on the double rows of rolling bearings by the axial loading device and the radial loading device so that axial and radial loads can be accurately applied to the tested double rows of rolling bearings simultaneously. The single-pivot double row rolling bearing supporting type rotor comprehensive performance experiment device can be used for simulating comprehensive performance of engine main shaft bearings under the complicated conditions of high temperature and high DN value.

This invention relates to a method for testing double ends in the translay protection of a transmission line including: 1, a protection device transfers the sample values of three-phase current and three-phase voltage, 2, the device computes the theta of the double side voltage based on their sample values when the voltages of both sides are larger than the designed threshold, 3, one side shifts theta of the AC voltage sent by the opposite, then the voltage phases applied by the two-side test instruments are equal, therefore, a unified voltage phase primary standard is set up for the AC output of the instruments, 4, the protection device takes the voltage phasor phase of the two sides as the primary standard of the current phase to adjust the current phase, and a relay protection device can rectify the phase between the voltage and current of its side to carry out the test for protecting both ends, 5, triggering the two-end test.

The invention discloses an in-loop test system and method of impedance hardware of a double-fed blower fan. The system comprises an electric and electronic real-time simulation platform; the electric and electronic real-time simulation platform establishes a real-time digital simulation model including an electrical network, a small signal voltage source for impedance test, a shafting of a wind turbine generator system, a motor and a main circuit, a protective circuit and filtering branches of a current transformer; the real-time digital simulation model is made real-time and then downloaded into a simulator of the electric and electronic real-time simulation platform; and a controller of the to-be-tested double-fed blower fan is connected with the real-time digital simulation model via an input and output interface of the simulator. According to the invention, in-loop test for the impedance hardware of the double-fed blower fan can be realized flexibly and simply, engineering practicality is approached, and a test result is more accurate.

The invention provides a single-hole observation device and method for double layers of underground water levels of a karst mountainous area, and belongs to the technical field of water conservancy and hydropower engineering. The above device comprises an inner pipe, a casing pipe and a sealing component, wherein the casing pipe is clung to the hole inner wall of the broken rock mass section of aborehole hole; the inner wall of the casing pipe and the outer wall of the inner pipe are arranged at intervals; the inner pipe comprises an upper end and a lower end, wherein the lower end of the inner pipe extends out of the casing pipe and enters to be below the lowest water level of the lower layer; and the sealing component is sheathed to the inner pipe. The above method is combined with theabove device, and before the above device is installed, a stepped hole is drilled in advance. When the above device and the above method detect double layers of underground water levels, the amount ofboreholes is reduced, a purpose of accurately testing double layers of stable underground water levels of the karst mountainous area is achieved, drilling cost is saved, meanwhile, time for investigation work is saved, and the device and the method have good economic benefits.

The invention discloses a double-motor cutting-part loading test device of a roller-type coal mining machine, which belongs to the technical field of a coal mining machine, and the double-motor cutting-part loading test device comprises a tested double-motor cutting part, a connecting lug supporting frame, a planet head supporting frame, a test connecting sleeve, a universal coupler and a torque loading device, one end of the tested double-motor cutting part is connected with the connecting lug supporting frame, the other end is connected with a second planet heat supporting frame, the test connecting sleeve is installed between a first planet head supporting frame and the second planet head supporting frame, the torque loading device is connected with the universal coupler, and a single-motor cutting part is installed between the connecting lug supporting frame and the planet head supporting frame. The double-motor cutting-part loading test device has beneficial effects that the single-motor cutting part is used for substituting the double-motor cutting part to be connected with the torque loading device, and only one set of torque loading device and one corresponding universal coupler are needed, so that the structure is simple, the test cost is effectively reduced, the test installation time can be shortened, the working efficiency can be improved, and an ideal test effect can be achieved.

The invention discloses a double-electric-layer capacitive flexible pressure sensor with an enhanced inclined structure and a manufacturing method. The sensor comprises an inclined microstructure electrode and an electrolyte layer formed by combining a polymer with an ionic liquid. The manufacturing method comprises that an inclined groove imprinting mold is prepared, the inclined microstructure electrode is prepared by a nano imprinting and sputtering deposition method, a working counter electrode and the solid electrolyte are prepared, and the inclined microstructure electrode, the working counter electrode and the solid electrolyte are assembled; and after that the sensor is connected to a capacitance test system, ions in electrolyte layer and electrons in an external circuit are gathered in the contact interface between the inclined microstructure electrode and the electrolyte layer under the voltage effect to form a tested double-electric-layer capacitor, the capacitance is proportional to the area of the interface between the electrolyte layer and the inclined microstructure electrode, the contact area is increased after that the sensor bears a force, and further the capacitance is increased. The sensor has a wide measurement range, and is extremely sensitive within a large pressure range.

Electrical testing system which is mainly used for testing double-sided printed board (DSB) (having terminals which are electrically connected with each other are separately provided on the two sides, respectively) is provided. The system includes a test board which is electrically contacted with the PCB, a test fixture which supports the test board and the PCB, testing probes which output an electrical signal, and a sensor which receives the electrical signal through the PCB and the test board. When the PCB is mounted on the test board, the electrical signal outputted from the testing probes sequentially is transmitted to the test board through the PCB, and based upon whether the sensor receives the electrical signal to thereby determine whether the terminals on the PCB corresponding to the testing probes are under the open circuit or the short circuit condition.

The invention relates to a thermal deformation-discordant single-rotor double-thrust bearing axial force testing method. The method includes the following steps that: a strain electrical measurement technology-based single-rotor double-thrust bearing secondary measurement engine refitting and assembly process is put forward; a two-test temperature deformation uncoordinated amount analysis method is established; a two-test double-thrust bearing total axial force test data analysis method is established; and according to test results, a double-thrust bearing axial force equally-shared assembly process is established. Two thrust bearings both bear an axial force of a rotor; in operation, under the axial force of the rotor, the axial force borne by the bearing II is converted, and the axial force borne by the bearing I is increased compared with an assembly state, and an increase value is affected by the axial clearance of the bearing II, the axial stiffness of the bearing I, and the deformation difference of the rotor and a stator under working temperature; and the rest of the axial force is borne by the bearing II. With the testing method of the invention adopted, thermal deformation-discordance-affected single-rotor double-thrust bearing axial force testing can be carried out directly, and testing is simple, and testing results are accurate and reliable.

The invention provides a mechanical property multidirectional testing fixture of a double faced adhesive tape. The mechanical property multidirectional testing fixture of the double faced adhesive tape comprises two modules which are respectively bonded with both faces of the double faced adhesive tape so as to carry out stress testing, wherein each module is provided with a bonding face and stressed connecting parts; multiple stressed connecting parts are arranged in each module; when the bonding faces of the two modules are respectively bonded with both faces of a tested double faced adhesive tape, the stress direction of each stressed connecting part of one module is respectively opposite to the stress direction of each stressed connecting part of the other module. The mechanical property multidirectional testing fixture of the double faced adhesive tape, provided by the invention, is convenient for carrying out multidirectional mechanical testing and capable of freely and conveniently switching tested medium materials without replacing the fixture.

The invention discloses an aircraft thrust section dynamic seal testing device and testing method, and solves the problems of high transportation cost, long consumed time and difficulty in overwater arrangement of measurement and control devices in aircraft thrust section dynamic seal testing. Testing double shafts replace a thrust shaft of an aircraft thrust section, the aircraft thrust section is assembled by a box frame (1), the seal state of the aircraft thrust section is really simulated, the aircraft thrust section (17) with an aircraft thrust section testing seal cover (18) is lifted in a pressure reactor (27) filled with water (28), an internal shaft driving motor (26) and an external shaft driving motor (25) are started after the pressure reactor (27) is sealed, dynamic seal of an internal shaft sealing ring (31) and an external shaft sealing ring (30) is tested, and then seal of a top end static sealing ring (22) of the aircraft thrust section (17) is tested. Assembly automation is high, and time and labor are saved.

The present invention provides a car start lock with alcohol test double insurance, the car start lock with alcohol test double insurance includes an alcohol tester, a starter lock, and a gear lever; Car start lock; the alcohol tester is connected with the gear lever signal arranged inside the alcohol test double insurance car start lock, and the gear lever is provided with a mechanical device for ejecting the gear lever; Start the lock cylinder of the car lock against each other. The invention of the alcohol test double-insurance car start lock performs an alcohol test on the driver. If the alcohol content in the driver's body exceeds the critical value, the start lock will be locked to prevent the car from starting. The structure is simple and easy to use; it can effectively prevent the driver from drinking The occurrence of driving ensures the safety of the car, other vehicles and pedestrians.

The invention discloses test equipment for double-camera mobile phone calibration, which comprises: a test box body, wherein an upper layer of the test box body is a test area, a lower layer of the test box body is an electric control cabinet, a display, a state display lamp and a keyboard assembly are arranged outside the test box body, and the test equipment also comprises a drawer assembly which is arranged in the test box body, and can be partially pulled out of the test box body from an opening formed in the side surface of the test box body; a placement bin which is movably arranged on the drawer assembly, and a to-be-tested mobile phone is fixed on the placement bin; a calibration test assembly which is arranged above the drawer assembly; and a lifting adjustment assembly which is vertically arranged in the test box body, wherein the top of the lifting adjustment assembly is connected with the calibration test assembly, and the lifting adjustment assembly is used for realizing vertical up-and-down movement of the calibration test assembly. The test equipment for double-camera mobile phone calibration provided by the invention not only can realize online automatic test, but also can support mobile phone equipment for testing double cameras at the same time.

The present invention belongs to the technical field of automobile components, and provides an apparatus for testing a double-clutch automatic transmission lubricating system. The apparatus comprises a base, a first platform in rotatable connection relative to the base around a first rotating shaft, and a second platform in rotatable connection relative to the first platform around a second rotating shaft, wherein the first rotating shaft and the second rotating shaft are intersected and are both fixed with the base; a driving motor and a double-clutch automatic transmission are arranged at the second platform, and a hydraulic system monitoring sensor module is connected to the double-clutch automatic transmission. The apparatus of the present invention can simulate the state of a vehicle in an actual work process through arrangement of the first platform and the second platform which are intersected, thereby saving test cost and reducing production efficiency.

The invention discloses a device for testing a double-sided solar cell. According to the device, an optical beam splitter of the fixed beam splitting ratio is arranged at the position of 45 degrees below an upper light source. When the light passes the beam splitter, a part of light transmits to directly irradiate to the surface of the cell or the component, and the other part of light enters a reflecting mirror of 45 degrees through reflection to irradiate to the back surface of the cell through three reflecting mirrors of 45 degrees. According to the method, the situation of inaccurate single side test result of the cell or the component caused by the interaction of double light sources can be effectively avoided.

The invention discloses an on-line testing device and method for the notebook-computer-motherboard-double-connecting-board function. The on-line testing device mainly comprises a testing machine table, the testing machine table comprises a first belt conveying line for conveying to-be-tested double connecting boards and a testing fixture for testing the double connecting boards on the first belt conveying line, and also comprises a positioning device arranged at the front end in the movement direction of the first belt conveying line and used for positioning the double connecting boards, and a driving mechanism for driving the first belt conveying line to move up and down is arranged below the first belt conveying line. The on-line testing device and method can directly test the double connecting boards, two motherboards can be tested at the same time at a time, the testing efficiency is improved, and meanwhile the step that a single board is put into the fixture is reduced.

The invention discloses equipment for testing double sides IV and EL of a cell. The equipment comprises a machine, a loading mechanism, a rotary transfer mechanism, a testing mechanism and an unloading mechanism, wherein the rotary transfer mechanism is fixed on the machine and comprises a four-station dividing plate and vehicles; the loading mechanism, the testing mechanism and the unloading mechanism are arranged on the machine or at the side of the machine along the rotating direction of the four-station dividing plate separately; four vehicles are connected outwards at uniform intervals along the periphery of the four-station dividing plate; the vehicles correspond to the loading mechanism, the testing mechanism and the unloading mechanism under the drive of the four-station dividing plate correspondingly; the vehicles are of a hollowed frame structure; and the testing mechanism is clamped towards the direction of the vehicles from the upper and lower sides. According to the equipment, simultaneous testing of the front and back sides of the cell can be achieved, the equipment is compact in structure, the space utilization efficiency is improved and the cost is reduced.