Abstract: A method for assuring safety during firing exercises with live ammunition by mobile skirmish participants (11, 11?) practicing under combat conditions in an enclosed practice range (10) that is monitored from a monitoring center (14), to protect all participants (11, 11?) from being shot by firing participants (11). The instantaneous positions of the participants (11, 11?) are continuously determined, and transmitted to a monitoring center (14) wherein the transmitted positions and movement regions derived therefrom for all participants (11, 11?), and the positions of stationary objects (13) that are present, are used to calculate current, authorized firing sectors (38) for the firing participants (11) and are individually transmitted to the firing participants (11). For each firing participant (11), the instantaneous weapon setting (39) is compared to the assigned firing sectors (38), and firing authorization is only given if the instantaneous weapon setting (39) lies within these firing sectors (38).

Abstract: A system for measuring unevenness formed by grooves and/or long waves in a surface of an object by using a measuring platform. The system moves the object and the measuring platform relative to each other and projects from the measuring platform a light streak that extends in a direction of the movement onto a surface of the object at a fixed projection angle that is tilted relative to a surface normal of the surface. The light streak is reproduced on a planar, position-sensitive photo receiver with a plurality of successive instantaneous exposures of the photo receiver, where the photo receiver is fixedly arranged on the measuring platform with a recording angle that is tilted relative to the fixed projection angle. The system records the surface along the direction of the movement with a plurality of continuous light-streak images and determines a surface profile of the surface along the direction of the movement from deformations in the plurality of the light-streak images.

Abstract: A method of producing a composite ultrasonic transducer having transducer elements comprising piezoelectric ceramic, with the elements being dispersed in plastic and radiating essentially in the longitudinal direction. To reduce production costs, in several method steps, a plurality of flat ceramic bodies (20) having a plurality of parallel, slot-like openings (21) that are closed on all sides are inserted into a casting mold (25), and the casting mold (25) is filled with plastic (26). After hardening, the resulting ingot (28) is unmolded, and, on the unmolded ingot (28), the ceramic material (26) on the end surfaces away from one another and extending transversely to the longitudinal direction of the openings (21) is removed to the point that the plastic material (26) imbedded in the openings (21) is exposed at the end surfaces (211).

Abstract: A matching amplifier for an induction probe which detects low-frequency alternating magnetic fields of floating bodies propagating in water. The matching amplifier has an isolating amplifier and a frequency response-determining network, with the network being provided with a frequency pass region having a band-pass characteristic and an integrating response in the band pass for the purpose of canceling the decorrelation of the measuring values emitted by the induction probe, with the integrating response being matched to compensate for the decorrelation of the measuring signal of the induction probe generated by the differentiating effect of the induction probe.

Abstract: The device for simulating longitudinal and transverse accelerations on a vehicle compartment has a first motion level for longitudinal displacement of the compartment and, placed on top of the former, a second motion level for transverse displacement of the compartment. To simplify the construction in the interests of low production costs and to allow large mechanical loads to be applied while keeping the height of the assembly low, a pair of bogies configured at a fixed longitudinal distance from one another can run in each level on the appropriate one of two parallel tracks. Each track of the mutually perpendicular pairs is at least in the front and rear track regions uniformly ascending. The second motion level directly accommodates the vehicle compartment.

Abstract: A probe for the detection of alternating magnetic fields has a highly permeable probe core (10) and a measuring winding (11) surrounding the probe core, with the measuring winding being put together of several coils (111, 112, 113) which are connected in series. In order to produce a probe which is suitable for the detection of extremely low-frequency alternating magnetic fields from a minimum distance commonly required for the detection of floating bodies that emit such alternating fields, the probe core (10) is put together from flat strips (16) of amorphous or microcrystalline magnetizable material with insulating strips (17) disposed in-between. The coils of the measuring winding (11) are configured as self-supporting coils, preferably as self-bonding wire coils, and surround the probe core (10) with almost no clearance.

Abstract: A drag antenna for a sonar system for detecting and/or locating sources of sound in water includes at least two acoustically sensitive lines positioned side-by-side and laterally spaced apart during a trailing operation. The lines are secured to each other at the leading ends and at the trailing ends by respective connecting element in order to lower the production costs for the drag antenna and to achieve a sufficiently constant lateral spacing between the acoustically sensitive lines.

Abstract: An electro-acoustical transducer arrangement for underwater antennas comprised of a plurality of hydrophones (10) which are arranged at equal distances in a linear array, and are to be disposed vertically above each other on a support. For reasons of a simplified assembly along with good receiving properties, the hydrophones (10), together with a reflector (11) disposed behind them in the direction of incoming sound, are embedded in an acoustically transparent rigid cast enclosure (20) of an elastomer, preferably polyurethane, which can be worked in a casting process. The connecting lines (12) of the hydrophones (10) of the enclosure 20 are combined in a common plug (13), which is accessible on a front end of the rigid cast enclosure (20). The rigid cast enclosure (20) is provided with devices for fastening the enclosure to the support.

Abstract: A method is provided for measuring the acoustic backscatter property of the floor of a body of water in which an acoustic multibeam echosounder employed on a ship is used to measure the sonic backscattered from a narrow transmission target strip on the sea floor that extends essentially vertically beneath the center of the transmitting antenna, transversely to the travel direction of the ship and which is successively exposed to sonic pulses by the transmitting apparatus. The measured backscatter is converted into sonic backscatter values allocated to receiving strips (115) of the multibeam echosounder. Calibration curves are constructed for all floor elements along the course line of the ship by echosounder measurements during a calibrating operation following a 90.degree. pivot of the echosounder around the vertical axis of the ship.