Device for the determination or monitoring of a physical or chemical process parameter
AssigneeEndress + Hauser GmbH + Co. KG
InventorsAlexander Muller, Christoph Rompf
Life of this patent
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Abstract
The invention relates to a device for the determination or monitoring of a physical or chemical process parameter of a medium with a sensor, a first regulation/analytical unit and a second regulation/analytical unit, whereby each regulation/analytical unit comprises several components. According to the invention, at least one component of each of the first regulation/analytical unit and the second regulation/analytical unit has a redundant and diverse embodiment.
Claims11
1-10. (canceled)
The apparatus for determining and/or monitoring a physical or chemical, process parameter of a medium, comprising:
- a sensor;
- a first control/evaluation unit;
- and
- a second control/evaluation unit;
- wherein each control/evaluation unit has multiple components, with at least one component of the first and second control/evaluation units being embodied redundantly and diversely.
The apparatus as claimed in claim 10, further comprising:
- a first microprocessor assigned to said first control/evaluation unit;
- a second microprocessor assigned to said second control/evaluation unit, wherein:
- said two microprocessors are of different types.
The apparatus as claimed in claim 10, further comprising:
- a first microprocessor assigned to said first control/evaluation unit;
- a second microprocessor assigned to said second control/evaluation unit, wherein:
- said two microprocessors come from different sources.
The apparatus as claimed in claim 10, wherein:
- software stored in said microprocessors comes from different manufacturers.
The apparatus as claimed in claim 10, wherein:
- the process parameter is one of:
- fill level, foam formation, flow rate, density, viscosity, pressure, conductivity, and chemical composition of the medium.
The apparatus as claimed in claim 10, wherein:
- said sensor is a sensor for determining and/or monitoring one of:
- the fill level of a medium in a container, and for determining the density of a medium in the container.
The apparatus as claimed in claim 10, wherein:
- said two control/evaluation units detect the reaching of the predetermined fill level as soon as a predetermined change in frequency occurs, or, said two control/evaluation units determine the density of the medium on the basis of the oscillation frequency of said oscillatable unit.
Dependencies are inferred from the claim text.