Patent ID: 6889561
Filing Date: 2005-05-10
Classification: G01F

Abstract:
1. A mass flowmeter for flowing media which works on the Coriolis principle comprising, at least one straight measuring tube conveying the flowing medium, at least one oscillation generator acting on the measuring tube, at least one measurement value sensor detecting Coriolis forces and/or Coriolis oscillations based on Coriolis forces and outputting a measurement signal, a supporting tube accommodating the measuring tube, the oscillation generator and the at least one measurement value sensor, at least one first stress sensor for detecting the stress state of the measuring tube, wherein the first stress sensor comprises a length-change sensor, a correction device for correcting the measurement signal, the at least one measuring tube and the supporting tube being connected to one another at spaced-apart fixing points in a manner excluding relative axial movements and the axial spacing of said fixing points representing the oscillation length of the measuring tube, and the at least one measurement value sensor and the at least one first stress sensor being connected to the correction device, in order to feed to the correction device the measurement signal and the stress signal outputted by the at least one first stress sensor, and at least one second stress sensor detecting the stress state of the supporting tube, wherein the second stress sensor comprises a length-change sensor, said at least one second stress sensor being connected to the correction device in order to feed to the correction device the stress signal outputted by the at least one second stress sensor, so that a measurement signal can be outputted from the correction device that is corrected on the basis of the stress signal outputted by the at least one first stress sensor and the stress signal outputted by the at least one second stress sensor.