Other

Heimo Denk

Werner Moser

Peter Mantsch

Peter Claassen

The device comprises an evaluation unit and at least one transducer for feeding the electric signal to this unit on the occurrence of a characteristic event and the evaluation unit comprises a recognition unit sensing the occurence of the characteristic event. To permit determination of the trigger point characterizing the occurrence of the characteristic event also in the case of heavily noise-contaminated measuring signals the evaluation unit is provided with one or several comparators in addition to the recognition unit, whose thresholds are spaced out over a certain range of levels, and--depending on whether the transducer signal has reached the threshold of the recognition unit--by using the information contained in the evaluation unit, which is influenced by the sequence of the comparator responses according to the signal shape delivered by the transducer, for determination of the trigger point characterizing the occurence of the characteristic event, in a manner predetermined in the evaluation unit.

Device for determining a trigger point on an electric signal with given

A partitioning circuit will partition into subintervals the time interval between two signals delivered by a recognition circuit, and will activate a gate circuit during one of these intervals which has been predetermined. In addition to the recognition circuit, the sequence of signals from a sensor responding to the occurrence of an at least approximately periodic event, is fed to a comparator circuit which will transmit a pulse to the gate circuit each time a certain signal level has been exceeded. If the gate is active, this pulse will be available for further processing.

Device for generating an electric trigger pulse

An apparatus is disclosed, for measuring the angular position of a shaft of a machine at the occurrence of an event originating from the operation of the machine, relative to a reference position of the shaft. The apparatus comprises a first sensor responsive to the reference position of the shaft (signal II) and a second sensor which, on the occurrence of the event, produces an output pulse and which produces a number of interference pulses in the periods between production of the output pulses (signal I). A comparator (4) having a threshold value which is capable of being exceeded both by the required pulses and the interference pulses, and a recognition circuit (3,6) which is adapted to recognize output pulses produced on the occurrence of the event, are arranged to control an evaluation circuit such as a counter (10). The evaluation circuit ascertains, e.g. by counting angular increment marker pulses (signal III), the angle through which the shaft rotates between the time when the threshold of the comparator (4) was last exceeded prior to triggering of the recognition circuit by the required event, and the time when the shaft reaches the reference position.

Apparatus for measuring the angular position of a shaft

A measuring device for measuring the angle of rotation of a machine shaft between a reference angular position of the shaft and the angular position at the instant of the occurring of a phenomenon caused by the operation of the machine.

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Feldbach, Austria

Heimo Denk