Proceq Sa

Siemens Technologies Ag, Cerberus Division

Peter Stierli

Marco Brandestini

David Siegwart

The device for the impedance-based probing of materials described herein comprises a two-dimensional array of coils () and a measurement unit () adapted to determine, for each coil (), a parameter indicative of its impedance. A pulse generator () is able to generate current pulses in each coil (). The circuitry drives and senses the coil array through row and column lines (rp. . . rpN, cp. . . cpN, c. . . csN) in order to minimize the number of required components. The device can, in particular, be used for probing concrete.

Impedance-based measurement device with a two-dimensional array of coils

Device for determining wear in a carbon ceramic brake disk. The device includes a coil arrangement having at least one coil structured and arranged to generate a magnetic field in the brake disk and to detect an eddy current in the brake disk, and an arcuate measuring area.

Device for determining the wear of a carbon ceramic brake disk

An intrusion detector has a housing with an infrared device disposed therein, an infrared sensor, a detector window provided in the housing wall for the passage of infrared radiation from the external space onto the infrared sensor, an element for focusing the infrared radiation incident through the detector window onto the infrared sensor and having a sabotage surveillance device including an infrared transmitter and an infrared receiver. The infrared transmitter and the infrared receiver are disposed inside the housing and the detector window is substantially transparent to radiation emitted by the infrared transmitter. The sabotage surveillance of the detector takes place by measuring the proportion of the radiation reflected onto the infrared receiver from the inside of the detector window and the radiation transmitted onto the infrared receiver from the surrounding space. The detector may also contain an ancillary detector device such as an ultrasonic device with an ultrasonic transmitter and an ultrasonic receiver. The signal of the ultrasonic receiver preferably has two frequency ranges; one range which is typical of movements in the space under surveillance and the other which is typical of sabotage of the detector. A common evaluation circuit is provided for the ultrasonic section and the infrared section.

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Uerikon, Switzerland

Peter Stierli