455 results about "Test article" patented technology

Disclosed herein is a thermoplastic composition comprising a combination of: a polysiloxane-polycarbonate copolymer and a poly(aliphatic ester)-polycarbonate copolymer comprising soft block ester units of the formula (8a):

wherein m is 4 to 18, wherein the thermoplastic composition has a melt volume rate of 14 cc/10 min to 22 cc/10 min at 300° C. and under a load of 1.2 Kg and a dwell time of 6 minutes, according to ASTM D1238-04, wherein an article molded from the thermoplastic composition and having a thickness of 3.2 mm has a percent transmittance of greater than 85% according to ASTM D1003-00, and wherein 100% of a set of five test articles each having a thickness of 3.2 mm and molded from the thermoplastic composition exhibit ductile fracture at −40° C. when measured for notched Izod Impact according to ASTM D256-04. An article comprising the thermoplastic composition is also disclosed.

A monitoring system for monitoring a test article includes a scanning system and a computer system. The test article may be positioned within a fluid tunnel. The scanning system may be configured to scan the test article and record positional data of at least one point on an article surface of the test article. The computer system is in communication with the scanning system for receiving the positional data and being operative to determine at least one of the following: a position of the test article, an attitude of the test article, and deformation of the article surface.

A thermoplastic composition is disclosed, comprising: a polymer component comprising a polyestercarbonate copolymer comprising ester units and carbonate units; a polycarbonate copolymer comprising branched carbonate units and carbonate units; and 0.01 to 10 wt. %, based on the total weight of the polymer component, of a polymeric compound comprising at least two epoxy groups, wherein the polymeric compound has a weight average molecular weight of 1,500 to 18,000; wherein a test article having a thickness of 3.2 mm and molded from the thermoplastic composition retains more ductility after aging at 134° C. and 100% humidity for 48 hours than an article having a thickness of 3.2 mm and molded from the same thermoplastic composition without the polymeric compound comprising at least two epoxy groups, each measured in accordance with ASTM D3763-02.

The invention provides a high-speed rotor blade flying-off test device, comprising a driving system, a vacuum anti-explosion system, a lubrication cooling system and a monitoring and control system. A driving motor is connected with a rotor test article through a transitional transmission mechanism, the vacuum anti-explosion system includes a vacuum chamber, the vacuum chamber is internally provided with a flying-loss protective cover, and a rotor rotation space and a blade flying-loss protective space are formed in the flying-loss protective cover, and are separated through a buffering separator plate. The buffering separator plate is arranged inside the flying-loss protective cover inside the vacuum chamber, after a blade on the rotor test article flies off, the blade stays in the blade flying-loss protective space, thus the blade that flies off does not collide with the rotating rotor test article, so that a test can be guaranteed to be carried out normally, at the same time, safety of test personnel and test equipment can be also effectively guaranteed, so as to ensure rotation safety of an engine rotor, and a technological means of an important empirical basis is provided for engine design finalizing.

A stereoscopic three-dimensional optical metrology system and method accurately measure the location of physical features on a test article in a manner that is fast and robust to surface contour discontinuities. Disclosed embodiments may image a test article from two or more perspectives through a substantially transparent fiducial plate bearing a fiducial marking; camera viewing angles and apparent relative distances between a feature on a test article and one or more fiducials may enable accurate calculation of feature position.

The invention provides an on-site steady-state accuracy verification system for an electronic current transformer and a verification method thereof. The method comprises the following steps: a, the electronic current transformer is connected with a standard current transformer in series, and primary testing current is applied to the standard current transformer and a to-be-tested electronic current transformer through a current riser; b, a secondary current signal of the standard current transformer becomes digital quantity after analog-to-digital conversion, and then the digital quantity is transmitted to an analysis processing unit of the on-site steady-state accuracy verification system for the electronic current transformer; c, the digital quantity output by the electronic current transformer is connected with the mainframe of the on-site steady-state accuracy verification system for the electronic current transformer through an Ethernet cable after photoelectric conversion; and d, the analysis processing unit performs analysis processing to the digital quantity of the standard voltage signal collected by the on-site steady-state accuracy verification system for the electronic current transformer and the digital quantity output by the electronic current transformer to obtain the verification value of the to-be-tested article. The method can realize the on-site steady state verification of the electronic current transformer and has the advantages of high verification accuracy, high speed and high efficiency.

An eddy current testing probe has a flexible substrate adapted to face to a surface of a test article, a plurality of coils which are fixed to the flexible substrate and energized one of which is capable of being changed sequentially, a pressing member for pressing the substrate toward the test article, an elastic member arranged between the substrate and the pressing member, and a movement limiting member for limiting a movement of the pressing member toward the test article.

The invention discloses a fiber reinforced polyurethane modified polyisocyanurate composite material and a preparation method thereof. It is characterized in that it is composed of a fiber mat and a polyisocyanate-containing polyurethane composition poured on the fiber mat, foamed and cured. Among the components of the polyurethane composition, The weight of the polyurethane composite material includes 75%-96% of combined polyalcohol and 1%-3% of foaming agent. The invention adopts polyol as the main raw material and water as the foaming agent, so that the composite material has good fluidity while having excellent characteristics, and can be demolded quickly; the molecular hydroxyl number is between 2 and 4, Polyols with a hydroxyl value between 300 and 700 can reduce the viscosity of the composite material and improve fluidity. The use of small molecular polyols can reduce the viscosity of the composite material, improve fluidity, and increase the initial strength of the product, which can be quickly released from the mold. .

The invention provides a visual experiment device for melting of a nuclear reactor fuel rod and a method. The visual experiment device comprises a high-temperature melting furnace provided with a plurality of transparent windows, wherein a test article is vertically arranged in the high-temperature melting furnace; rhenium-molybdenum electrodes are arranged at the upper end and the lower end of the test article respectively and connected with copper electrodes penetrating the side wall of the high-temperature melting furnace; the test article comprises the fuel rod; a tungsten-rhenium heatingrod is arranged in the fuel rod; a cooling water circulation system used for cooling the high-temperature melting furnace is arranged outside the high-temperature melting furnace. By means of the cooling water circulation system for the high-temperature melting furnace, the temperature of the outer side of the furnace body is kept in safe limits, an external high-speed camera can work normally, and a core melting process under a severe accident of a reactor can be simulated realistically. Obtained experiment data can provide verification for the traditional numerical simulation method, and uncertainty of the existing severe accident analyzing procedure is reduced.

The invention relates to a method for measuring the electric capacity and the dielectric loss of a capacitance type voltage transformer, comprising the following steps of: disassembling primary and secondary lead wires of a tested article, and connecting a secondary winding of the tested article to the ground in a short circuit way by a fuse wire; disassembling a lower-voltage terminal X point ofa compensation reactor of the tested article and an end shield to connect to the ground, wherein the end shield and the X point are both suspended in midair; connecting a measuring ground point of a full-automatic digital electrical bridge AI-6000 E to the ground; connecting a high-voltage line and a measuring line to the full-automatic digital electrical bridge AI-6000 E; switching on a main power switch, then switching on an inner high-voltage permitting switch, selecting positive connection wire, inner standard, frequency conversion and testing voltage 10 kV, and finally pressing a starting/pausing key to carry out measurement for more than 1 second; and after the measurement is finished, pressing an up arrow key and a down arrow key to look up data. The invention can effectively reduce measurement errors and is beneficial to objectively and accurately analyzing and evaluating the insulating conditions of equipment.

A non-destructive testing system includes a test article interface and a reference article interface. The test article interface includes a connector to couple to a metal component of an article under test (AUT) and a connector to couple to a carbon fiber composite component of the AUT. The reference article interface includes a connector to couple to a metal component of a reference article (REF) and a connector to couple to a carbon fiber composite component of the REF. The system also includes sensors to generate signals based on voltage and current thermoelectrically induced between the test article interface and the reference article interface, where the current and the voltage are based on a temperature difference between the AUT and the REF. The system also includes a processor to generate, based on the signals, an output indicating whether the AUT is expected to pass a lightning strike test.

A method for designing and assembling a high performance catalyst bed gas generator for use in decomposing propellants, particularly hydrogen peroxide propellants, for use in target, space, and on-orbit propulsion systems and low-emission terrestrial power and gas generation. The gas generator utilizes a sectioned catalyst bed system, and incorporates a robust, high temperature mixed in metal oxide catalyst. The gas generator requires no special preheat apparatus or special sequencing to meet start-up requirements, enabling a fast overall response time. The high performance catalyst bed gas generator system has consistently demonstrated high decomposition efficiency, extremely low decomposition roughness, and long operating life on multiple test articles.

An automobile test bench comprises a portal frame, at least one group of actuator, a clamp mechanism and a supporting mechanism which supports the structure of the whole test bench, the clamp mechanism is respectively connected with the actuator and the supporting mechanism and used for fixing a test article, the actuator is movably installed on the portal frame and comprises a sliding mechanism, an actuating cylinder and spherical hinges, wherein the sliding mechanism is installed on a beam of the portal frame, the spherical hinges are arranged at the upper and lower ends of the actuating cylinder, the sliding mechanism is connected with the actuating cylinder through the upper end spherical hinge, and the clamp mechanism is connected with the actuating cylinder through the lower end spherical hinge. The actuator is connected through the gapless spherical hinges, the problem of resonance vibration caused by fit clearance is eliminated, moreover, the actuating cylinder is capable of moving, convenience of the installation of the test article is increased, and working efficiency is improved.

Methods are described for the use of conformable eddy-current sensors and sensor arrays for characterizing residual stresses and applied loads in materials. In addition, for magnetizable materials such as steels, these methods can be used to determine carbide content and to inspect for grinding burn damage. The sensor arrays can be mounted inside or scanned across the inner surface of test articles and hollow fasteners to monitor stress distributions. A technique for placing eddy-current coils around magnetizable fasteners for load distribution monitoring is also disclosed.

The invention relates to a classifier for automatically testing wafers, which comprises a feeding box, a receiving box and an empty box arranged at the front end of a stand. The feeding box is used for placing wafers to be tested, the receiving box is used for placing the tested wafers with different levels, while the empty box can receive an empty charging tray at the feeding box or an empty charging tray needing to supplement the receiving box. In addition, a test device is arranged at the back end of the stand, and is provided with a tester and a probe capable of lifting; two transfer devices capable of moving between a transportation area and the test device transfer the wafers to be tested alternately to the test device to test, and transfer the wafers after being tested to the transportation area; and a pick-and-place device is used for picking the wafers to be tested on the feeding box and placing the wafers on the two transfer devices, and picking and placing the tested wafers on the two transfer devices to the receiving boxes with different levels respectively according to the test result. Therefore, the classifier can ensure quality of the tested articles and effectively promote working convenience and usage benefit of productivity.

The invention discloses a machine reading comprehension method based on multi-task joint training, and a computer storage medium. The machine reading comprehension method comprises a model construction and training stage and a test stage, wherein the model construction and training stage comprises the following steps: 1, constructing a training set; 2, establishing a machine reading comprehensionmodel which comprises a coding layer, an attention matching layer and a decoding layer; 3, dividing the training set into W sub-sample sets according to the number of samples, and training the machinereading comprehension model by using the W sub-sample sets to obtain W machine reading comprehension models; and the testing stage comprises the steps: cutting off a to-be-tested article, inputting the processed article and questions into the trained W machine reading comprehension models, obtaining W predicted answer starting positions, W predicted answer ending positions and W corresponding distribution probabilities, and calculating the average value to serve as the starting position, the ending position and the corresponding distribution probabilities of a final answer. The machine reading comprehension method can solve the problems that an existing machine reading comprehension method is low in Chinese text accuracy and the like.

The invention relates to an automatic reliability test device for an electric operating mechanism of a molded case circuit breaker and a control method of the device. The device is composed of a test control cabinet and a test article cabinet. The test control cabinet comprises an industrial personal computer, a drive circuit, an electric operating mechanism condition monitoring circuit and a breaker condition monitoring circuit; the test article cabinet comprises an auxiliary power control circuit, a test article, a breaker and a load circuit, wherein the industrial personal computer is connected with the drive circuit, the electric operating mechanism condition monitoring circuit and the breaker condition monitoring circuit respectively; the drive circuit is connected with the auxiliary power control circuit, the test article and the breaker respectively; the auxiliary power control circuit is further connected with the test article; the test article is further connected with the electric operating mechanism condition monitoring circuit and the breaker respectively; and the breaker is further connected with the breaker condition monitoring circuit and the load circuit. The device is controlled by the industrial personal computer, and the reliability test of the breaker electric operating mechanism can be completed automatically and accurately.

Te invention relates to an intelligent type partial discharge-free ultrahigh voltage sine wave modulation voltage resistance device. The device comprises a frequency conversion power unit, a middle excitation boosting transformer and a serial resonant circuit which are sequentially connected in series; the frequency conversion power unit commutates and inverts 380V triphase current, obtains and outputs single-phase frequency-adjustable alternating current, and the 380V triphase current is boosted to 1kV around by the middle excitation boosting transformer; the output of the middle excitation boosting transformer is connected with the serial resonant circuit; the serial resonant circuit comprises a resonant reactor L1 and a voltage divider; a capacitor Cx of a tested article and the voltage divider are in parallel connection; a secondary end of the voltage divider is connected with a high voltage measuring meter and a protection device respectively; and the high voltage measuring meter and the protection device are connected with feedback ends of the frequency conversion power unit. The device is the intelligent type partial discharge-free ultrahigh voltage sine wave modulation voltage resistance device which has a simple and compact structure, simple operation and wide application range, can meet requirements of voltage resistance and partial discharge test of ultrahigh voltage electric equipment.

Calibrated additive manufacturing processes can be used to manufacture constructs which can include or exclude heat exchangers incorporating fractal branched conformal cooling passages for use as molds, rocket engine components, and test articles. Described herein are the manufacture and use of conformal cooling of heat exchangers made by an additive manufacturing process.

Systems and methods for analyzing structural test data are disclosed. In one embodiment, a method includes applying a sequence of loads to a test article, receiving raw test data indicative of the applied loads from at least one sensor operatively associated with the test article, receiving predicted test data indicative of the predicted loads on the test article, filtering out invalid test data, cycle counting to pair loads in the test data, performing a first fatigue damage computation based on the raw test data, performing a second fatigue damage computation based on the predicted test data, and comparing the first and second fatigue damage computations. The filtering, cycle counting, and performing of the first and second fatigue damage computations, and the comparison of the first and second fatigue damage computations, may be performed simultaneously using a spreadsheet program.

The invention discloses a current-induced-heat-type defect evaluation method used for a power equipment connecting part. The method includes the steps: selecting a tested article model aiming at a tested article, and establishing a testing circuit used for providing testing current; applying the testing current different in intensity on the tested article model through the testing circuit respectively, detecting heating temperature, corresponding to the testing current different in intensity, of a heating point of the tested article model, and calculating temperature rise relative to environmental temperature to acquire the testing current of the tested article model under each testing working condition and the temperature rise corresponding to the testing current; fitting the testing current of the tested article model under each testing working condition and the temperature rise corresponding to the testing current to acquire a fitting empirical equation between the testing current and the temperature rise; evaluating current-induced-heat-type defect of the tested article according to the fitting empirical equation. The current-induced-heat-type defect evaluation method has the advantages of accuracy and reliability in evaluation, wide application range, few needed parameters and convenience and quickness in operation.