Method for determining density of a medium in a tank of a hybrid tank measurement system
AssigneeEndress + Hauser GmbH + Co. KG
InventorBjörn Bellmann
Life of this patent
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Abstract
The application discloses a method for determining density of a medium in a tank of a hybrid tank measurement system having at least two pressure sensors for determining pressure measurement values, wherein the pressure sensors are specified for mutually differing pressure measuring ranges each having an absolute measurement error, and wherein the method includes: registering at least one pressure measurement value with the two pressure sensors; forming a pressure difference magnitude from the registered pressure measurement values; comparing the pressure difference magnitude with a threshold value; and determining the density of the medium based on the comparing of the difference values with the threshold value.
Claims11
A method for determining a density of a medium in a tank, comprising:
- providing a hybrid tank measurement system having at least a first pressure sensor and a second pressure sensor having mutually differing pressure measuring ranges, the first pressure sensor having a first absolute measurement error and the second pressure sensor having a second absolute measurement error;
- registering a first pressure value using the first pressure sensor and a second pressure value using the second pressure sensor;
- calculating a pressure difference magnitude from the difference between the first pressure value and the second pressure value;
- comparing the pressure difference magnitude with a threshold value;
- and
- determining the density of the medium based on the comparing of the pressure difference magnitude with the threshold value.
A hybrid tank measurement system, comprising:
- a first pressure sensor having a first measure range;
- a second pressure sensor having a second measuring range, wherein the first measuring range and the second measuring range partially overlap;
- a level-measuring device;
- a temperature sensor;
- and
- a processor embodied to configure and to control the first pressure sensor, the second pressure sensor, the level measuring device, and the temperature sensor, the processor further configured to:
- register a first pressure value using the first pressure sensor;
- register a second pressure value using the second pressure sensor;
- calculate a pressure difference magnitude from the difference between the first pressure value and the second pressure value;
- compare the pressure difference magnitude with a threshold value;
- and
- determine the density of the medium based on the comparing of the pressure difference magnitude with the threshold value.
Dependencies are inferred from the claim text.