摘要:
A system and method to inspect flaws associated with a part. The system includes a first image capturing device configured to capture a first set of images of the part and a computer operably associated with first image capturing device and configured to receive and analyze the first set of images. The method includes treating the part with a magnetic particle and fluorescent penetrant processing, capturing a first set of images of an outer surface of the part with the first image capturing device, and identifying a part defect with an algorithm associated with the computer.
摘要:
A magnetic property determination apparatus that detects a magnetic property of each magnetic material included in a paper sheet transported through a transport path and determines the magnetic materials. The magnetic property determination apparatus includes a magnetic detection unit that generates on the transport path a bias magnetic field having a magnetic field direction inclined to a transport surface of the paper sheet by a specific angle and detects the magnetic charge of the magnetic materials by detecting variation of the bias magnetic field; and a magnetization unit that is arranged upstream of the magnetic detection unit in the transport direction and magnetizes the magnetic materials by generating on the transport path a magnetization magnetic field having a magnetic field direction oriented in a direction different from the direction of the bias magnetic field. At a position at which the magnetic detection unit detects the magnetism, the magnetic materials are in a state in which the magnetic materials are magnetized in mutually different magnetization directions according to coercive force thereof.
摘要:
Identification, quantification and characterization of biological micro- and nano-systems is enabled by magnetically spinning these natural, non-magnetic systems with the aid of induced magnetization. Biofriendly magnetic micro- and nano-labels enable magnetorotation in extremely weak electromagnetic fields. The spinning of these micromotors can be observed by a simple, CD-like, optical tracking system. The spinning frequency response enables real-time monitoring of single (cancer) cell morphology, with sub-microscopic resolution, yielding previously undeterminable information. Likewise, it enables super-low detection limits for any (cancer) biomarker.
摘要:
The invention relates to apparatus monitoring test media used in or applicable to magnetic testing, said apparatus comprising a test element fitted with an artificial defect and a test medium feed and a test return as well as a magnetic field generator, further a magnetic field adjustment unit to adjust the magnetic field strength acting on the test element and/or the artificial defect, being adjustable at different magnetic field intensities to check the test medium, and to a corresponding method.
摘要:
The invention relates to a manual lamp, especially for optical crack testing according to the magnetic powder testing and dye penetration method. Said manual lamp comprises at least one LED having an emission wavelength located in the UVA range as an illuminating means.
摘要:
A field strength indicator for a magnetic particle inspection process is used to determine field strength and direction sufficient to identify real flaws in a test piece. The field strength indicator is a substantially flat shim having at least one series of artificial flaws formed therein by electric discharge machining. The artificial flaws have a geometry which render them compatible with real flaws and thus enable the magnetic field strength and direction to be properly set for conducting a magnetic particle inspection procedure. The surface containing the artifical flaws must be covered with a thin inert and non-magnetic coating for proper operation.
摘要:
A process and device for detecting and evaluating surface cracks in workpieces wherein a picture is produced of the surface of the workpiece by means of a video camera and said picture is digitized and is processed by means of a computer to produce a binary picture of any cracks present and a sorting report is triggered when a preselected threshold level is exceeded. In order to obtain a sorting signal that is independent of the absolute brightness of the original picture a blurred background picture is derived from the original picture levels that have been converted to digitized grey shade levels and subtracted from the original picture, the difference picture formed in this way giving the crack representation. A dynamic threshold level for the sorting signal is determined by comparing the grey shade distribution of the original or the difference picture with at least one previously evaluated or difference picture and a binary picture is produced from the original or the difference picture and the grey shade threshold, and picture elements with their gray shades exceeding the set threshold are indicated as defects. The surface of the workpiece may be pre-treated by the magnetic powder or dye penetration process and/or contrast intensifying means.
摘要:
Method and apparatus for inspecting weld seams by means of particles of magnetizable material which align themselves in a magnetic field in a manner characteristic of faults the particles are suspended at the start of a test in a first liquid Fl.sub.1, the particles being freely mobile in the suspension and no viscosity change of the suspension taking place. Thereafter a substance is added to the suspension which effects a change of state, the particles aligned in the magnetic field thereby being fixed in their position.
摘要:
A flux scanner head generates a unidirectional magnetic field external to the head adjacent a scanning surface thereof. Workpieces to be subjected to magnetic particle inspection may be successively passed through, held in, or otherwise associated with, the unidirectional field at different angles to achieve magnetization along multiple axes, without physical or electrical contact with the workpiece. The scanner head is usable with both residual and continuous methods of magnetic particle inspection, and as either a hand-held or fixed-mount system. The scanner head itself incorporates a coil having a plurality of turns with a ferromagnetic core separating such turns so as to intensify and direct outward and external to the surface of the scanner head the magnetic field generated by current flow through the coil.
摘要:
A aqueous system for testing magnetizable articles is provided by a master based slurry of magnetic particles including a corrosion inhibitor, surface tension adjusting agent, an antifoam agent, a viscosity adjustment element, and a buffering element to assist in the corrosion resistance.