Inline measuring device with a vibration-type measurement pickup
First Claim
1. An inline measuring device for measuring a medium flowing in a pipeline, said inline measuring device comprising:
- a vibration-type measurement pickup; and
measuring device electronics electrically coupled with said vibration-type measurement pickup, wherein;
said vibration-type measurement pickup includes at least one measuring tube vibrating during operation and communicating with the pipeline, an electromechanical exciter mechanism acting on said at least one measuring tube for producing and maintaining mechanical oscillations of said at least one measuring tube, a sensor arrangement for producing at least one oscillation measurement signal representing oscillations of said at least one measuring tube, and a measurement pickup housing housing said at least one measuring tube together with said exciter mechanism and said sensor arrangement;
said measuring device electronics monitors a static internal pressure within said measurement pickup housing and/or monitors a hermeticity of said at least one measuring tube,said measuring device electronics repeatedly determines at least one monitoring value on the basis of at least one operational parameter internally determined and/or internally measured during operation, andsaid measuring device electronics generates internally at least one alarm signal by means of said monitoring value, said alarm signal signalling a superelevated static internal pressure within said measurement pickup housing and/or said alarm signal signalling the presence of a leak in said at least one measuring tube.
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Accused Products
Abstract
An inline measuring device serves for measuring a medium, especially a gaseous and/or liquid medium, in a pipeline. It includes, a vibration-type measurement pickup and a measuring device electronics electrically coupled with the measurement pickup. The measurement pickup has at least one measuring tube vibrating during operation and communicating with the pipeline, an electromechanical, especially electrodynamic, exciter mechanism acting on the at least one measuring tube for producing and maintaining mechanical oscillations of the measuring tube, a sensor arrangement for producing at least one oscillation measurement signal representing oscillations of the measuring tube and having at least one oscillation sensor arranged on the measuring tube or in its vicinity, and a measurement pickup housing. In an inline measuring device of the invention, it is additionally provided that the measuring device electronics monitors a static internal pressure within the measurement pickup housing and/or a hermeticity of the at least one measuring tube.
41 Citations
41 Claims
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1. An inline measuring device for measuring a medium flowing in a pipeline, said inline measuring device comprising:
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a vibration-type measurement pickup; and measuring device electronics electrically coupled with said vibration-type measurement pickup, wherein; said vibration-type measurement pickup includes at least one measuring tube vibrating during operation and communicating with the pipeline, an electromechanical exciter mechanism acting on said at least one measuring tube for producing and maintaining mechanical oscillations of said at least one measuring tube, a sensor arrangement for producing at least one oscillation measurement signal representing oscillations of said at least one measuring tube, and a measurement pickup housing housing said at least one measuring tube together with said exciter mechanism and said sensor arrangement; said measuring device electronics monitors a static internal pressure within said measurement pickup housing and/or monitors a hermeticity of said at least one measuring tube, said measuring device electronics repeatedly determines at least one monitoring value on the basis of at least one operational parameter internally determined and/or internally measured during operation, and said measuring device electronics generates internally at least one alarm signal by means of said monitoring value, said alarm signal signalling a superelevated static internal pressure within said measurement pickup housing and/or said alarm signal signalling the presence of a leak in said at least one measuring tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A method for monitoring an inline measuring device for measuring a medium flowing in a pipeline, which inline measuring device includes measuring device electronics, as well as a vibration-type measurement pickup electrically coupled therewith, the measurement pickup including at least one measuring tube communicating with the pipeline and vibrating during operation, an electromechanical exciter mechanism acting on the at least one measuring tube for producing and maintaining mechanical oscillation of the measuring tube, a sensor arrangement for producing at least one oscillation measurement signal representing oscillations of the measuring tube and having at least one oscillation sensor arranged on the measuring tube or in its vicinity, and a measurement pickup housing housing the at least one measuring tube together with the exciter mechanism and the sensor arrangement, said method comprising the steps of:
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causing the medium to be measured to flow through the at least one measuring tube of the measurement pickup; causing an exciter current delivered by the measuring device electronics to flow through the exciter mechanism and causing the at least one measuring tube to vibrate, in order to produce reaction forces in the medium, which forces correspond to at least one measured variable to be registered for the medium; registering vibrations of the at least one measuring tube by means of the sensor arrangement and producing at least one oscillation measurement signal representing mechanical oscillations of the measuring tube for determining a static, internal pressure within the measurement pickup housing and/or monitoring a hermeticity of the at least one measuring tube; generating, by means of the measuring device electronics, at least one monitoring value, whose level is a function of an instantaneous static internal pressure within the measurement pickup housing and/or of a medium instantaneously surrounding the at least one measuring tube;
as well ascomparing said at least one monitoring value with a limit value, which represents a maximally allowable level of the monitoring value for the measuring tube during operation, and/or comparing said at least one monitoring value with a change limit value, which represents a maximally allowable rate of change of the monitoring value during operation. - View Dependent Claims (36, 37, 38, 39, 40, 41)
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Specification