Iad Gesellschaft Für Informatik, Automatisierung Und Datenverarbeitung Mbh

Gerd Bumiller

Hermann Hampel

Ulrich Berold

Christoph Reck

Christoph Dipl-Ing Reck

A measurement device, which communicates data to at least one system, and which has the capability of identifying measurement data returned by the system via the data communication as its own, and the capability to rule out manipulation of measurement values without use of a public or non-personal key. The measurement device includes at least an encryption and/or signature encoder that supplies information including a validity and reliability identifier for inspecting the integrity of the data, and compiles said information into a current data set and transfers it to at least said communication interface for transfer, and at least an encryption and/or signature decoder that inspects data sets returned via the communication interface using one or more keys in memory for integrity of data content and identification of the measurement device and, upon successful inspection of this data, supplies said data for further processing, evaluating or displaying.

Measurement device, particularly energy counter and method for recognition of manipulations

A device and method for secondary radar signal reception with quasi-dynamic or dynamic sectoring of a space to be monitored. The device includes at least one antenna assembly including antenna elements for the reception of transmitted secondary radar signals, a signal processing unit connected via a connection point to the antenna elements for the joint processing of received antenna signals, outputs associated with a couple matrix in the signal processing unit and individual receivers. The couple matrix includes adjustable coefficients for sectoring of the space to be monitored and for performing a superposition of the antenna signals using a multiplicative-additive combination of the received antenna signals. In the case of dynamic sectoring of the space, each receiver receives for each receipt telegram another weighted superposition of the antenna signals with certain couple coefficients, and in the case of quasi-dynamic sectoring the adjustable coefficients are fixed over a longer time period.

Device for receiving secondary radio signals with quasi-dynamic or dynamic sectoring of the space to be monitored and corresponding method

The various designs of capacitive or inductive coupling/decoupling fitted on cables in a medium voltage network are known, the inductive coupling circuits constantly inducing current in the sheath of the electric cable. The invention aims at obtaining ranges of capacitive coupling/decoupling for an inductive coupling circuit. Therefore, an inductive coupling unit comprising a ring enclosing the sheathed electric cable and a coil, coupled to said ring by induction and connected to a transmission and reception device, is designed such that, upon transmission the current of the message signal is directly induced in the conductor and, upon receptions only the conductor current is evaluated. In a first embodiment, a by-pass, located downstream of the inductive coupling unit and upstream of the defined surface, is connected to the sheath and to ground or to the compensation potential. In a second embodiment, a by-pass connected to the sheath and to the ground or to the compensating potential has a conduction path passing back through the ring core. The invention concerns telecommunication systems in current distribution electrical networks.

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Furth/Vach, Germany

Gerd Bumiller