81 results about "Characterization test" patented technology

Apparatus and methods are provided for analyzing surface characteristics of a test object using broadband scanning interferometry. Test objects amenable to these apparatus and methods include but are not limited to semiconductor wafers, semiconductor devices, metallic surfaces, and the like. An interferometry system is used to obtain an interferometry signal and related to data embodied in the signal representative of the test object surface. This signal and/or data is used to construct an n-dimensional function that includes an independent frequency variable and an independent time variable, and/or an n-dimensional function that includes an independent scale variable and an independent time variable, and/or a multi-domain function. These functions are compared with various models to obtain a best match that is then used to characterize the test object surface.

A laser system using ultrashort laser pulses is provided. In another aspect of the present invention, the system includes a laser, pulse shaper and detection device. A further aspect of the present invention employs a femtosecond laser and a spectrometer. Still another aspect of the present invention uses a laser beam pulse, a pulse shaper and a SHG crystal. In yet another aspect of the present invention, a multiphoton intrapulse interference phase scan system and method characterize the spectral phase of femtosecond laser pulses. Fiber optic communication systems, photodynamic therapy and pulse characterization tests use the laser system with additional aspects of the present invention.

A multimode network analyzer (VNA) and the method of using the same are disclosed. The VNA includes a signal input port that receives a test signal, an LO signal generator, a mixer, an IF filter and a processor. The LO signal generator generates a mixer LO signal from a mixer input test signal, the LO signal generator having first and second modes. The mixer LO signal is substantially a first periodic signal in the first mode and a second periodic signal having a plurality of harmonically related tones in the second mode. The mode that is currently operative is determined by a mixer control signal. The mixer is driven by the LO signal and has an output that is filtered by the IF filter to generate an IF signal. The processor analyzes the IF signal to determine a parameter characterizing the test signal and outputs that parameter.

A solar panel includes a wireless tag affixed to the solar panel where the wireless tag includes a wireless communication interface, a memory, and an auxiliary communication port. The memory of the wireless tag is configured to store at least panel-specific data of the solar panel where the panel-specific data includes at least current-voltage characteristics of the solar panel. The data is stored onto the memory of the wireless tag through the auxiliary communication port and the stored data is accessible through the wireless communication interface of the wireless tag. In another embodiment, a method for storing panel-specific data in a solar panel includes placing the solar panel with a wireless tag affixed thereto in a solar panel characterization chamber to perform characterization test and storing panel-specific data of the solar panel, including at least current-voltage characteristics of the solar panel, in the memory of the wireless tag.

The present invention provides a flexible on-chip testing circuit and methodology for measuring I/O characterization of multiple I/O structures. The testing circuit includes a register bank, a central processing controller (CPC), a character slew module, a delay characterization module, and a character frequency module. The register bank stores multiple instructions, and measurement results. The CPC fetches the instructions from the register bank. The CPC includes various primary and secondary state machines for interpreting the fetched instructions for execution. Depending on the input instruction the CPC applies stimulus to the IUT and the output of the IUT is used by the Local characterization modules (CHARMODULE) to extract the desired characterization parameters such as the character slew module which measures a voltage rise/fall time either for a single voltage IUT or a multi-voltage IUT. The Test Methodology for STIOBISC consists of an automated ATE pattern generation from verification test benches and automated result processing by converting the ATE data logs into the final readable format, thereby considerably reducing the test setup and output processing time. The testing circuit can operate in multiple modes for selecting one of these modules.

The invention relates to a fiber composite thin plate nonlinear vibration characterization test method based on vibration measurement with laser, First, the inherent frequency and modal shape of a fiber composite thin plate needs to be obtained accurately. Then, a nonlinear vibration characterization test is carried out according to a test idea of from a time domain to a frequency domain and thento a time-frequency domain. The specific steps are as follows: testing inherent frequency of each order of the fiber composite thin plate; testing the modal shape of each order of the fiber compositethin plate according to the inherent frequency; carrying out a harmonic distortion nonlinear characterization test; carrying out a nonlinear time-varying damping characterization test; carrying out ahard/soft rigidity nonlinear characterization test; carrying out a characterization test of amplitude dependent on nonlinear damping; carrying out a nonlinear jump characterization test; carrying outan ultraharmonic/subharmonic resonance nonlinear characterization test; and carrying out an internal resonance nonlinear characterization test. The method provided by the invention can obtain variousnonlinear vibration characterization of the fiber composite thin plate through one-time testing, a test result is relatively accurate, the test efficiency is improved, and an important reference is provided for establishing a method system for a nonlinear vibration test of a composite structure of this type.

The optical transfer function of imaging optics is carried out with a plurality of tilted edges with respect to the edge-response detection line. The effect of the tilt is to stretch out the edge response so that fine details can be detected even operating at a spatial frequency below the Nyquist limit of the detector. The use of multiple targets, each corresponding to a sub-region of the field of view of the optics being tested, enables the simultaneous characterization of the full field of view of the test optics with a single measurement without the use of a magnifying objective. The result is a rapid measurement and a simpler apparatus suitable for high-throughput testing. A pair of tilted edges can be used in a target to also determine the sagittal and tangential OTFs (as well as that of any other arbitrary cross-section). All of these data are acquired with a single measurement.

Embodiments may include a method to estimate motion data based on test image data sets. The method may include receiving a training data set comprising a plurality of training data elements. Each element may include an image data set and a motion data set. The method may include training a machine learning model using the training data set, resulting in identifying one or more parameters of a function in the machine learning model based on correspondences between the image data sets and the motion data sets. The method may further include receiving a test image data set. The test image data set may include intensities of pixels in a deep-tissue image. The method may include using the trained machine learning model and the test image data set to generate output data for the test image data set. The output data may characterize motion represented in the test image data set.

Methods to detect and characterize a defect in a fiber preform residing in a molding cavity for liquid composite molding (e.g. resin transfer molding) to make a composite component or structure. The defect may result from fiber preform misplacement in the molding cavity, accidental inclusions, preform density variations, and/or distortion of the preform. Gas pressures at multiple locations on a mold wall are measured during gas flow through the mold cavity containing the fiber preform. Normalized or measured pressures are analyzed by discriminant analysis to detect and characterize any defect in the tested fiber preform.

An apparatus for estimating a duration of a test of a device under test to be performed by a test device, the apparatus including an input unit adapted for receiving test information indicative of the test to be performed, and a processing unit adapted to estimate the duration of the test of the device under test performed by the test device based on the received test information and based on a model characterizing the test.

The invention discloses a surface modification method for a spark plasma sintering type amorphous alloy coating. The surface modification method includes the steps of S1, adopting a spark plasma sintering furnace and sintering amorphous powder through an instantaneous high-temperature field generated by the pulse energy, the discharge pulse pressure and the joule heat to obtain a sintered amorphous alloy coating sample; and S2, carrying out laser re-melting on the obtained amorphous alloy coating sample through a laser welding machine to obtain the final amorphous alloy coating. Characterization tests are carried out on the obtained sample and include the steps that XRD characterization is carried out on the sample before and after laser re-melting; the surface appearance of the re-molten sample is observed through a stereoscopic microscope; the surface hardness of the sample after re-melting is measured through a micro-hardness tester; and the microscopic structure of the cross section of the sample is observed through a scanning electron microscope. According to the method, the spark plasma sintering technology and the laser re-melting technology are combined, the amorphous alloy coating surface with higher hardness and strength and better abrasive resistance can be obtained, and therefore the service life of work-pieces can be prolonged.

Disclosed are methods and apparatus for characterizing board test coverage. In one method, potentially defective properties are enumerated for a board, without regard for how the potentially defective properties might be tested. For each potentially defective property enumerated, a property score is generated. Each property score is indicative of whether a test suite tests for a potentially defective property. Property scores are then combined to characterize board test coverage for the test suite.

A test stand for characterization of a tunable mass damper may include (a) a support base including a stop member, (b) a test plate coupled to the support base, with the test plate configured to move relative to the support base and to fixedly carry a tunable mass damper, (c) a spring coupled to the support base and the test plate, (d) a lever configured to be releasably coupled to the test plate and to move the test plate relative to the support base against the urging of the spring, and (e) a latch mechanism configured to release the test plate from the lever when the test plate is at a predetermined position relative to the support base. The motion of the test plate, after the test plate has been released by the latch mechanism, may be halted by the stop member of the support base.

A method and system includes a first substrate and a second substrate, each substrate comprising a predetermined baseline transmittance value at a predetermine wavelength of light, processing regions on the first substrate by combinatorially varying at least one of materials, process conditions, unit processes, and process sequences associated with the graphene production, performing a first characterization test on the processed regions on the first substrate to generate first results, processing regions on a second substrate in a combinatorial manner by varying at least one of materials, process conditions, unit processes, and process sequences associated with the graphene production based on the first results of the first characterization test, performing a second characterization test on the processed regions on the second substrate to generate second results, and determining whether at least one of the first substrate and the second substrate meet a predetermined quality threshold based on the second results.

The invention relates to the technical field of an in-situ physical property test and discloses an in-situ physical property test system and a sample mounting method. According to the in-situ physicalproperty test system provided by the invention, vacuum equipment is connected with vacuum sample preparation equipment; in the vacuum equipment, a sample is placed into a vacuum test cavity and the vacuum test cavity is sealed; a vacuum test part is connected with an insertion rod assembly; the insertion rod assembly is in sealed connection with a rapid sample injection chamber; the rapid sampleinjection chamber and a dilution refrigerator are communicated through adoption of an insertion plate valve; and the insertion rod assembly is controlled to act, thereby pushing the vacuum test part into the dilution refrigerator for a sample test. Accuracy when the in-situ physical property test system is used for characterizing a physical property is ensured. A physical property characterizationrequirement under all extreme conditions related to the dilution refrigerator are satisfied. The problem that according to a characterization test depending on the dilution refrigerator, a sample loading and unloading process is exposed to air is solved. An original high-intensity magnetic field and ultra low temperature environment of the dilution refrigerator is completely reserved.