Pressure sensor with a compensation unit and method for compensation
AssigneeVEGA Grieshaber KG
InventorGünter Kech
Life of this patent
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Abstract
The invention relates to a pressure sensor and related method for the compensation of a pressure, wherein the pressure sensor has a pressure measuring cell, with a housing and an electronic sensor system and an electronic evaluation system disposed within the housing, as well as at least one first temperature sensor for measuring a first temperature and a second temperature sensor for measuring a second temperature, wherein the pressure sensor has a compensation unit connected to the at least two temperature sensors, and wherein the compensation unit determines a compensation for the pressure taking into account at least the first temperature and the second temperature.
Claims8
A pressure sensor comprising:
- a pressure measuring cell and with a housing and an electronic sensor system and an electronic evaluation system disposed within the housing, wherein the pressure sensor has at least one first temperature sensor for measuring a first temperature and a second temperature sensor for measuring a second temperature, wherein the temperature sensors are disposed at different positions along an axial direction of the housing and are at different distances from a process fluid or medium, wherein the pressure sensor has a compensation unit connected to the at least two temperature sensors, and wherein the compensation unit is designed for determining a compensation taking into account at least the first temperature and the second temperature, wherein the pressure sensor has an input unit for inputting a piece of input information regarding:
- an installation position of the pressure sensor on a container,
- a medium to be subjected to a measurement, and/or
- a type of container,
- wherein the compensation unit is connected to the input unit, wherein the compensation unit is designed for determining the compensation of different temperatures and different thermally-induced deformations of the pressure sensor, thermal input dependent of the medium and its state of aggregation and/or temperature distribution influenced by the type and material of the container.
A method for compensation, using a pressure sensor comprising a compensation unit, such method comprising the following steps:
- 1. determining at least one first temperature with a first temperature sensor and a second temperature with a second temperature sensor;
- 2. supplying the at least one first temperature and the second temperature to the compensation unit;
- and
- 3. determining a compensation with the compensation unit, such compensation taking into account at least the first temperature and the second temperature;
- wherein the compensation unit is supplied with a piece of input information about:
- an installation position of the pressure sensor on a container,
- a medium to be subjected to a measurement,
- a type of container, and/or
- a material of the container,
- and the determination of the compensation of different temperatures and different thermally-induced deformations of the pressure sensor, thermal input dependent of the medium and its state of aggregation and/or temperature distribution influenced by the type and material of the container is also carried out.
Dependencies are inferred from the claim text.