Abstract: The application relates to a sensor using a gold layer (3) with embedded nanodiamonds (2) on which surface plasmon resonance (SPR) is used to detect target molecules (5).

Abstract: A test head for testing a workpiece has an ultrasonic transducer configuration with a plurality of ultrasonic transducers. The test head further contains a carrier matched to a surface contour of the workpiece, a damping layer arranged on the carrier, and a flexible conductor foil configuration, which is arranged on the damping layer and has a number of electrically separated conductor tracks which corresponds to the number of transducer elements. The transducer elements are arranged on the conductor tracks alongside one another in at least one row, and in each case are electrically contact-connected to one of the conductor tracks.

Abstract: A test head for testing a workpiece has an ultrasonic transducer configuration with a plurality of ultrasonic transducers. The test head further contains a carrier matched to a surface contour of the workpiece, a damping layer arranged on the carrier, and a flexible conductor foil configuration, which is arranged on the damping layer and has a number of electrically separated conductor tracks which corresponds to the number of transducer elements. The transducer elements are arranged on the conductor tracks alongside one another in at least one row, and in each case are electrically contact-connected to one of the conductor tracks.

Abstract: The invention is a method using ultrasound for non-destructive examination of a test body, whereby ultrasonic waves are coupled into the test body with one ultrasonic transducer or a multiplicity of ultrasonic transducers and the ultrasonic waves reflected inside the test body are received by a multiplicity of ultrasonic transducers and converted into ultrasonic signals. The ultrasonic signals detected in the single measurement periods are individually stored and are accessible for off-line evaluation after termination of the measurements. Application of corresponding reconstruction algorithms permits subsequent synthetization of any desired ultrasonic coupling-in angles and focussing into the volume region of the test body from the stored ultrasonic signals without requiring any additional ultrasonic measurements.

Abstract: In a method and device for ultrasonic testing of a workpiece, a multiplicity of ultrasonic testing pulses are launched into the workpiece from a test surface thereof. At least two ultrasonic testing pulses are launched into the workpiece to be tested at launching points that are spaced apart from one another by a test step width measured along the test surface. A single measured value (?) assigned to a local point located in the workpiece is calculated on the basis of the received signals assigned to the at least two ultrasonic testing pulses.

Abstract: A method performs ultrasound testing of a test body having a hole extending in an axial direction. The method include disposing a test head within the hole. The test head extends in the axial direction and has sensor rings which are at a distance from one another and are disposed one behind the other in the axial direction. The sensor rings have a plurality of ultrasound transducers which are at a distance from one another. The ultrasound transducers disposed in a segment of each of the sensor rings extend in a circumferential direction of a respective sensor ring on at least a subsection of a circumference of the respective sensor ring. An ultrasound test pulse is injected into the test body. Measured values of first and second echo signals are evaluated to determine at least one of a location or an orientation of a fault in the test body.

Abstract: The invention relates to a method for the non-destructive examination of a test body by means of ultrasound, whereby ultrasound waves are injected into the test body by means of one or more ultrasound transducers and ultrasound waves reflected inside the test body are received by a plurality of ultrasound transducers and are converted to ultrasound signals. The ultrasound signals are detected in individual measurement intervals and are stored individually and are accessible to offline evaluation after termination of the measurements. The inventive method allows to subsequently synthesize any acoustic irradiation angle and focusing in the physically possible volume range of the test body from the stored ultrasound signals by using corresponding reconstruction algorithms, thereby eliminating the need for additional ultrasound measurements.

Abstract: A method for an imaging ultrasonic inspection of a three-dimensional workpiece, in which ultrasonic waves are coupled into the workpiece with at least one ultrasonic transducer and ultrasonic waves reflected within the workpiece are received by ultrasonic transducers and converted into ultrasonic signals forming the basis of the non-destructive imaging ultrasonic inspection.

Abstract: A device is disclosed for material testing on a test object having at least electrically conducting and ferromagnetic material parts. The test object has at least one technical surface on which at least one electromagnetic ultrasonic transducer (EMUS) is rolled. The at least one transducer includes at least one permanent magnet or an electromagnet and at least one eddy current coil. The at least one eddy current coil has at least one electrical strip conductor which is disposed at or parallel to a surface area of a rolling member which can be rolled on the technical surface of the test object, with the surface area rolling along with the rolling member during rolling.

Abstract: The invention relates to a device and a method for testing the material of a test object (4) which contains at least electrically conductive and ferromagnetic material fractions and has at least one engineered surface (5), by means of at least one electromagnetic ultrasonic transducer assembly (EMUS). Said assembly comprises a permanent or electromagnetic assembly (1) comprising at least two magnetic poles (N, S) of different magnetic polarity that face the engineered surface (5), in addition to an eddy current coil (2) that is placed in close proximity to the engineered surface (5) between the two magnetic poles (N, S) in indirect or direct relation to the engineered surface (5). The invention is characterized in that the eddy current coil (2) is configured and arranged in such a way that when said coil (2) is supplied with an alternating current, free ultrasonic waves that run essentially perpendicular to the engineered surface (5) are generated and propagate inside the test object (4).

Abstract: A method for the non-destructive inspection of a test body using ultrasound is disclosed, in which at least one ultrasonic transducer couples ultrasonic waves into the test body and ultrasonic waves reflected inside the test body are received by ultrasonic transducers and converted into ultrasonic signals, which form the basis of the non-destructive inspection.

Abstract: In a method and device for ultrasonic testing of a workpiece, a multiplicity of ultrasonic testing pulses are launched into the workpiece from a test surface thereof. At least two ultrasonic testing pulses are launched into the workpiece to be tested at launching points that are spaced apart from one another by a test step width measured along the test surface. A single measured value (?) assigned to a local point located in the workpiece is calculated on the basis of the received signals assigned to the at least two ultrasonic testing pulses.

Abstract: A method for an imaging ultrasonic inspection of a three-dimensional workpiece, in which ultrasonic waves are coupled into the workpiece with at least one ultrasonic transducer and ultrasonic waves reflected within the workpiece are received by ultrasonic transducers and converted into ultrasonic signals forming the basis of the non-destructive imaging ultrasonic inspection.

Abstract: A method is described for nondestructive testing of a test body having at least one acoustically anisotropic material area using ultrasound. The method of the invention includes ascertaining or providing directionally specific sound propagation properties which describe an acoustically anisotropic material area; coupling ultrasonic waves into the acoustically anisotropic material area of the test body; receiving ultrasonic waves reflected from an interior of the test body using ultrasonic transducers; and analyzing ultrasonic signals generated by the ultrasonic transducers so that an analysis is performed which is directionally-selective on a basis of directionally-specific sound propagation properties of the anisotropic material.

Abstract: A method for the non-destructive inspection of a test body using ultrasound is disclosed, in which at least one ultrasonic transducer couples ultrasonic waves into the test body and ultrasonic waves reflected inside the test body are received by ultrasonic transducers and converted into ultrasonic signals, which form the basis of the non-destructive inspection.

Abstract: An ultrasonic test process and device intended for testing a preferably cylindrical specimen (2), such as railway wheel, which is capable of displacement along a support, such as a rail (10). The ultrasonic test device comprises at least one ultrasonic probe (14) disposed in the support (10) which emits acoustic waves in the direction of the specimen. The acoustic waves are reflected by defects in the specimen (2) and received again by a probe. The test device is designed to reliably and non-destructively test the volume and surface of the specimen (2) as it rolls over the support (10). In the process of the invention a number (m) of probes (14) are controlled so that the ultrasonic waves have a preferably horizontal polarization and are emitted into the specimen (2) at a predetermined angle (66) relative to the running surface (8) of the rail (10).

Abstract: A method for electromagnetic ultrasonic conversion includes exerting dynamic-mechanical forces upon particles of an electrically conductive material of a test sample by superimposing quasi-static magnetic and electromagnetic high-frequency fields of a transmission converter for generating ultrasonic vibrations when transmitting. Electrical fields are induced by waves arriving in the test sample resulting in vibrations of the particles of material inductively affecting the fields of a receiver converter when receiving. The excitation of the vibrations when transmitting and the induction of electrical fields when receiving are effected by Lorentz and magnetic forces as well as by magnetostriction forces if the test sample is ferromagnetic. Fill level and bubble formation are monitored in enclosures in the form of containers and pipelines for liquid, by coupling a transmission converter and a receiver converter to an enclosure wall.