| 摘要 |
The invention relates to a device (1) for measuring the pressure p of a fluid (3) flowing through a pipeline (2, 51), comprising at least one primary sensor (4), arranged on the outer circumference (2a, 51a) of the pipeline (2, 51), for measuring a primary physical measured variable (100) that is dependent on the pressure p, wherein the absolute value of the pressure p is obtained by setting said primary physical measured variable (100) against at least one calibrating quantity (101) and this calibrating quantity (101) relates to the geometry and/or to at least one material characteristic of the pipeline (2, 51). The device further comprises means (5) for determining the calibrating quantity (101) and also an evaluation unit (6) for determining the pressure p from the primary physical measured variable (100) in conjunction with the calibrating quantity (101), wherein the means (5) for determining the calibrating quantity (101) comprise: a measuring pipe (51), for which the calibrating quantity (101) is known and which can be fluidically connected to the pipeline (2), wherein the material and/or cross-sectional geometry of said measuring pipe differ(s) from the rest of the pipeline (2) and the primary sensor (4) is arranged on the outer circumference (51a) of the measuring pipe (51); and/or at least one calibrating sensor (52), arranged on the outer periphery (2a, 51a) of the pipeline (2) or the measuring pipe (51), said sensor being physically sensitive to the calibrating quantity (101). |
