Method for determining a pressure in a pressure measurement cell and a measurement cell assembly
US12287254B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 18, 2020 |
| Grant date | Apr 29, 2025 |
| Priority date | — |
| Expiry date | Jun 30, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L21/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a method and to a measurement cell assembly for determining a pressure in a pressure cell (2) are given, wherein the method consists in that a measurement signal (x) is determined, which is at least proportional to a measured pressure in the pressure cell (2), and in that the measurement signal (x) is filtered by means of a first filter unit (10) having a low-pass characteristic in order to produce an output signal (y), wherein the low-pass characteristics of the first filter unit (10) is defined by means of a first damping factor (α1). The method is characterized in that an input difference (x_diff), which results from a difference between the output signal (y) and the measurement signal (x), is filtered by means of a second filter unit (20) having a low-pass characteristic to determine an output difference, wherein the low-pass characteristic of the second filter unit (20) is defined by means of a second damping factor (α2), and in that the first damping factor (α1) of the first filter unit (10) is determined on the basis of the output difference of the second filter unit (20).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.