Abstract: A method and device are disclosed for evaluating received signals acquired during non-destructive ultrasonic testing of a test body, wherein ultrasound waves are generated inside the test body with an electromagnetic ultrasonic transducer acting as an ultrasound transmitter and ultrasound waves which propagate within the test body are converted into received signals with an electromagnetic ultrasonic transducer acting as an ultrasound receiver. The received signals are evaluated for the purpose of examining the test body.

Abstract: A method and device are disclosed for evaluating received signals acquired during non-destructive ultrasonic testing of a test body, wherein ultrasound waves are generated inside the test body with an electromagnetic ultrasonic transducer acting as an ultrasound transmitter and ultrasound waves which propagate within the test body are converted into received signals with an electromagnetic ultrasonic transducer acting as an ultrasound receiver. The received signals are evaluated for the purpose of examining the test body.

Abstract: Disclosed is an electromagnetic ultrasonic probe for coupling-media-free generation and reception of ultrasonic waves in the form of linearly polarized transverse waves in a workpiece (5), and from a workpiece (5), having a unit which generates the ultrasonic waves inside the workpiece (5) and which is provided with a transmission coil arrangement (7), to which a high-frequency voltage can be applied to generate a high-frequency magnetic field, and a premagnetizing unit (V) to generate a quasi-static magnetic field superimposed on the high-frequency magnetic field in the workpiece (5), and an ultrasonic waves reception unit providing a reception coil arrangement (8), with the transmission coil arrangement (7) and the reception coil arrangement (8) being disposed torus-shaped at least on one partially toroidally designed magnetic core (6), which is provided with two front ends (11) which can be turned to face the workpiece (5) and via which the high-frequency magnetic fields can be coupled into, respectively c

Abstract: Device for restricting or controlling and regulating the movement of remote-controlled parts, more particularly parts of a vehicle bodywork as well as a process for operating the device. The device and process can be used with particular advantage as a collision protection for window winders, sunroofs, doors or flaps, more particularly in connection with electrical displacement devices for motor vehicles. The device is characterized by an actuator and a sensor which are mounted on a cohesive uninterrupted transmission path which is a constituent part of the closing surface area of the remote-controlled part and/or of the fixed part interacting therewith. The arrangement is selected so that a part of the energy supplied by actuator is converted into acoustic surface waves which can scatter over the transmission path and can be received by the sensor.

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.