Sensor unit with safety system

Details Sensor unit with safety system Sensor unit with safety system

2007-11-30

2010-02-23

Deberadinis, Robert L. (Department: 2836)

Electrical transmission or interconnection systems

Personnel safety or limit control features

Reexamination Certificate

active

07667354

ABSTRACT:
A sensor unit is disclosed with a safety system for use with a signal generator, where at least one evaluation unit is provided for evaluating a signal from a sensor and for producing a first trigger signal based on the signal. In at least one embodiment, a more compact and less expensive version of a sensor unit is provided, which operates reliably under high safety demands. In at least one embodiment, this is achieved by a safety system which has a checking unit for checking the operation of the evaluation unit using a test signal. The test signal is processed by the evaluation unit in the same way as the signal from the sensor. The two-channel output is provided on the basis of a conclusiveness check in the checking unit.

REFERENCES:
patent: 5363303 (1994-11-01), Kaneko et al.
patent: 5513878 (1996-05-01), Ueda et al.
patent: 7439638 (2008-10-01), Lamarche et al.
patent: 42 44 262 (1993-07-01), None
patent: 103 45 819 (2005-04-01), None
patent: 0691244 (2000-03-01), None
patent: 0 968 567 (2001-07-01), None
patent: WO 02 42123 (2002-05-01), None

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