Measuring system

A measuring system, especially a measuring system for measuring at least one measured variable, x, of a fluid (FL1) flowing in a pipeline, which measuring system comprises:

• a measuring- and operating electronics (ME), especially one formed by means of a microprocessor and/or a digital signal processor;
• as well as a transducer apparatus electrically coupled with the measuring- and operating electronics (ME),
• wherein the transducer apparatus (MT) includes:
• a first tube (11) having a lumen (11′) surrounded by a wall, especially a metal wall, and extending from an inlet side, first end (11a) to an outlet side, second end (11b), especially an at least sectionally bent and/or at least sectionally straight, first tube which is adapted to be flowed through by a fluid, starting from the inlet side, first end and proceeding toward the outlet side, second end, and, during that, to be caused to vibrate,
• a second tube (12) having a lumen (12′) surrounded by a wall, especially a metal wall and extending from an inlet side, first end (12a) to an outlet side, second end (12b), especially an at least sectionally bent and/or at least sectionally straight second tube and/or a second tube constructed equally to the first tube (11) and/or arranged parallel to the first tube (11), which second tube is adapted, especially simultaneously with the first tube, to be flowed through by a fluid, starting from the inlet side, first end and proceeding toward the outlet side, second end, and, during that, especially simultaneously with and/or opposite-equally to, the first tube, to be caused to vibrate,
• an electromechanical-exciter mechanism formed by means of at least one, especially electrodynamic, oscillation exciter (41) for exciting and maintaining mechanical oscillations of both the first as well as also the second tube about associated static resting positions, especially mechanical oscillations of each of the tubes about imaginary first, and second, oscillation axes imaginarily connecting first and second ends thereof,
• a sensor arrangement (S) formed by means of at least a first, especially electrodynamic, oscillation sensor (51) for registering mechanical oscillations, especially inlet end, mechanical oscillations, of at least one of the tubes (11, 12),
• a first temperature sensor (71) coupled mechanically and thermally conductively with the wall of the first tube,
• which is positioned closer to the first end (11a) of the first tube (11) than to the second end (11b) of the first tube (11), and
• which is adapted to register a first measuring point temperature (41), namely a temperature of the wall of the first tube at a first temperature measuring point formed by means of the temperature sensor (71), and to convert such into a first temperature measurement signal (θ1), namely a first electrical measurement signal representing the first measuring point temperature (ϑ1), especially a first electrical measurement signal having an electrical signal voltage dependent on the first measuring point temperature and/or an electrical signal current dependent on the first measuring point temperature, as well as
• a second temperature sensor (72) coupled mechanically and thermally conductively with the wall of the first tube (11),
• which is positioned closer to the second end (11b) of the first tube (11) than to the first end (11a) of the first tube (11), and
• which is adapted to register a second measuring point temperature (ϑ2), namely a temperature of the wall of the first tube at a second temperature measuring point formed by means of the second temperature sensor (72) and to convert such into a second temperature measurement signal, namely a second electrical measurement signal (θ2) representing the second measuring point temperature (ϑ2), especially a second electrical measurement signal having an electrical signal voltage dependent on the second measuring point temperature and/or an electrical signal current dependent on the second measuring point temperature;
• and
• wherein the measuring- and operating electronics (ME) is adapted, with application of both the first temperature measurement signal (θ1) as well as also the second temperature measurement signal (θ2), to generate a transducer temperature measured value, which represents a transducer apparatus temperature, which deviates both from the first measuring point temperature (ϑ1) as well as also from the second measuring point temperature (ϑ2), in such a manner that a magnitude of the transducer temperature measured value is greater than a magnitude of the first measuring point temperature (ϑ1) and less than a magnitude of the second measuring point temperature (ϑ2), especially corresponds to an arithmetic average value of the first and second measuring point temperatures (ϑ1, ϑ2) and/or a weighted average of the first and second measuring point temperatures (ϑ1, ϑ2).