Safety device
AssigneeSick AG
InventorsVictor Kok Heng Phay, Adrian Schwarz
Life of this patent
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Abstract
The present invention relates to a safety device for securing a machine having a sensor that is configured to detect the presence of an object in a monitored zone and to output a detection signal when an object is located in the monitored zone and having an evaluation unit that is configured to receive the detection signal from the senor and to generate an output signal in dependence on the detection signal. Provision is made in accordance with the invention that the evaluation unit is adapted furthermore to generate the output signal in dependence on at least one additional criterion.
Claims11
A safety device for securing a machine, the safety device comprising:
- a sensor that is adapted to detect the presence of an object in a monitored zone and to output a detection signal when an object is located in the monitored zone;
- and
- an evaluation unit that is adapted to receive the detection signal from the sensor and to generate an output signal in dependence on the detection signal,
- wherein the evaluation unit is adapted furthermore to generate the output signal in dependence on at least one additional criterion, wherein the evaluation unit is adapted to generate and store at least one data pattern that
- i) represents a temporal progression of the detection signal and/or of the additional criterion for a regular operation of the machine;
- and/or
- ii) that represents a temporal progression of the detection signal and/or of the additional criterion for an operation of the machine on a presence of non-permitted operating conditions,
- with the output signal being generated on the basis of a comparison of an instantaneous temporal progression of the detection signal and/or of the additional criterion with the stored data pattern.
Dependencies are inferred from the claim text.