37 results about "Nondestructive assay" patented technology

Non-destructive analysis is carried out by irradiating an object with X-rays, for example, so that the X-rays from the object are incident on an analyzer crystal. The analyzer crystal can be of a transmission-type or a reflection-type. A pre-crystal device is used to make the radiation monochromated and parallelized. Atomic lattice planes of the pre-crystal device are approximately parallel with the atomic lattice planes of the analyzer crystal so as to use the angular analysis capability of the analyzer crystal. The thickness of the analyzer crystal is fixed. For example, for a transmission-type analyzer crystal, the thickness is such that irradiation with monochromatic parallel X-rays in the absence of the object results in a condition in which either one of (a) X-rays along a forward diffraction direction and (b) X-rays along a diffraction direction obtained by dynamical diffraction by the transmission type analyzer crystal have an intensity of nearly zero as compared to the intensity of the other with respect to the monochromatic parallel X-rays. At least one or both of an X-ray dark-field image and an X-ray bright-field are obtained.

A method and system for the non-destructive analysis of medical devices uses a confocal Raman microscope and other non-destructive analytical tools to assess the spatial distribution of components of an object such as the distribution of an active pharmaceutical ingredient (API) within a polymer matrix. In a preferred embodiment, confocal Raman spectroscopy was used to differentiate each component found in the sirolimus-eluting coronary stent. The unique spectral features identified for each component were then used to develop three separate calibration curves to describe the solid phase distribution found on drug-polymer coated stents. The calibration curves were obtained by analyzing confocal Raman spectral depth profiles from a set of 16 unique formulations of drug-polymer coatings sprayed onto stents and planar substrates.

The electromagnetic acoustic transducer (EMAT) transducer disclosed herein is useful for the non-destructive analysis of objects. The transducer comprises a core having a winding and a coil disposed between the core and the object to be analyzed. One transducer can be used as a transmitter and another transducer as a receiver. Then selectively switching static magnetic field in either transmitter or receiver and processing data with and without static magnetic field allows for eliminating artifacts due to parasitic coupling between the transmitter / receiver pair. The switching of the static magnetic field can be implemented either by using electromagnet or a pair of permanent magnets where magnetization of one permanent magnet is reversed to provide cancellation of the static magnetic field.

A system and method for non-destructively determining the grain orientation of a crystalline material using x-ray diffraction techniques to non-destructively analyze material and, more particularly, to a system and method for determining the grain orientation of an underlying crystalline material covered by an overlying polycrystalline material. Further, the system and method relate to the use of x-ray diffraction to non-destructively characterize parts and components to determine whether to accept or reject those components or parts for use in application.

Method for fabricating and inspecting small holes in a material are disclosed. The method includes directing light onto the material and through the holes formed in the material, and then collecting the light passing through the holes in the material onto a detector. The methods further include analyzing the light for properties of the holes, and modifying the process based these detected properties.

A method and system are provided for chip testing. The method includes ascertaining a baseline for a functioning chip with no stress history by performing a non-destructive test procedure on the functioning chip. The method further includes repeating the test procedure on a chip under test using a threshold derived from the baseline as a reference point to determine a stress history of the chip under test. The test procedure includes ordering each of a plurality of functional patterns by a respective minimum operating period corresponding thereto, ranking each pattern based on at least one preceding available pattern to provide a plurality of pattern ranks, and calculating a sum by summing the pattern ranks. The sum calculated by the ascertaining step is designated as the baseline, and the sum calculated by the repeating step is compared to the threshold to determine the stress history of the chip under test.

The invention relates to a BP-neural-network-based non-destructive determination method for characteristics of a steel corrosion product. The method comprises the following steps: (1) preparing pure-phase alpha-FeOOH and gamma-FeOOH; (2) preparing five or more samples of the mixtures prepared from alpha-FeOOH and gamma-FeOOH at different ratios; (3) manufacturing a working electrode used for electrochemical test; (4) mounting a three-electrode system comprising the working electrode, a counter electrode and a reference electrode, charging the working electrode with a constant current and detecting potential signals to obtain a chronopotentiometry V-T curve I; (5) drawing a standard curve to obtain two parameters Etau / 2 and Qtau; and (6) determining a chronopotentiometry V-T curve II for a rusted sample, comparing the chronopotentiometry V-T curve II with the standard curve to obtain the rust layer characteristics of the rusted sample. By virtue of the method, the in-situ detection of the characteristics of the corrosion product is carried out without breaking the rust layers; the dependence on large-scale analysis and test instruments is avoided; the method can be applied to on-site detection of the corrosion product, research on the protection performance of the rust layers and research on the influence factors of atmospheric corrosion.

The invention discloses a normal atmosphere chemical ionization source for surface desorption of a velocitron. A capillary and a spray point arranged in the capillary constitute a reagent ion generation system. When the reagent admitted through the capillary is sprayed out from one end of the capillary, the reagent is ionized to generate ions of the reagent due to the corona discharge of a discharge electrode; the reagent ions impact specimens inside a specimen disc to ionize the specimens, and the specimen ions are admitted into the velocitron inlet capillary to be used for detection. The ionization source disclosed by the invention is equipped with a moving interface, which can be connected with common velocitrons, such as LCQ, LTQ, TSQ and so on, so that the ionization source can be upgraded and become more powerful. The invention achieves quick and sensitive measurement of complicated basal body specimens by adopting the surface desorption atmospheric pressure chemical ionization mass-spectrometric technique under the condition that sample pretreatment is not required. In addition, the invention is applicable for real-time on-line non-destructive analysis in situ during industrial or environmental course. The ion source is joined with related velocitrons, and can achieve different detection modes, such as cation detection, anion detection, free radical ion detection and soon, according to the properties of specimens.