RU2008115465A - MEASURING ELECTRONICS AND METHODS FOR INSPECTION DIAGNOSTICS FOR FLOW METER - Google Patents

Abstract

1. Measuring electronics (20) for the flow meter (5), measuring electronics (20) contains an interface (201) for receiving an oscillatory response signal from the flow meter (5), moreover, the oscillatory response signal contains a response signal to the vibration of the flow meter (5) by a substantially constant resonant frequency, and a data processing system (203) associated with the interface (201), moreover, the measuring electronics (20) further comprises:! a data processing system (203) configured to receive an oscillatory response signal from an interface (201), determine a frequency (ω0) of an oscillatory response signal, determine a voltage (V) of a response signal and an excitation current (I) of an oscillatory response signal, measure a characteristic (ζ) attenuation of the flow meter (5) and determining the stiffness parameter (K) from the frequency (ω0), voltage (V) of the response signal, excitation current (I) and attenuation characteristic (ζ). ! 2. Measuring electronics (20) according to claim 1, in which the measurement of the attenuation characteristic (ζ) further comprises providing the oscillatory response of the flow meter (5) with the possibility of attenuation up to a predetermined base of the oscillation reference. ! 3. Measuring electronics (20) according to claim 1, in which the data processing system (203) is further configured to measure the attenuation characteristic (ζ) by removing the excitation of the flow meter (5) and allowing the vibrational response of the flow meter (5) to attenuate up to a predetermined reference base oscillations along with the measurement of the attenuation characteristics. ! 4. Measuring electronics (20) according to claim 1, in which the stiffness parameter (K) is K = (I · BLPO · BLDR · ω0) / 2ζV. ! 5. The way to determine

Claims (56)

1. Measuring electronics (20) for the flow meter (5), measuring electronics (20) contains an interface (201) for receiving an oscillatory response signal from the flow meter (5), moreover, the oscillatory response signal contains a response signal to the vibration of the flow meter (5) by a substantially constant resonant frequency, and a data processing system (203) associated with the interface (201), moreover, the measuring electronics (20) further comprises: a data processing system (203) configured to receive an oscillatory response signal from an interface (201), determine a frequency (ω ₀ ) of an oscillatory response signal, determine a voltage (V) of a response signal and a drive current (I) of an oscillatory response signal, measure a characteristic (ζ ) attenuation of the flow meter (5) and determining the stiffness parameter (K) from the frequency (ω ₀ ), voltage (V) of the response signal, excitation current (I) and attenuation characteristic (ζ). 2. Measuring electronics (20) according to claim 1, in which the measurement of the attenuation characteristic (ζ) further comprises providing the oscillatory response of the flow meter (5) with the possibility of attenuation up to a predetermined base of the oscillation reference. 3. Measuring electronics (20) according to claim 1, in which the data processing system (203) is further configured to measure the attenuation characteristic (ζ) by removing the excitation of the flow meter (5) and allowing the vibrational response of the flow meter (5) to attenuate up to a predetermined reference base oscillations along with the measurement of the attenuation characteristics. 4. Measuring electronics (20) according to claim 1, in which the stiffness parameter (K) is K = (I · BL _PO · BL _DR · ω ₀ ) / 2ζV. 5. A method for determining a stiffness parameter (K) of a flowmeter stiffness, the method comprises the steps of: receiving an oscillatory response signal from the flowmeter, the oscillating response signal comprising a response signal to the vibration of the flowmeter at a substantially resonant frequency, and determining the frequency (ω ₀ ) of the oscillatory response signal moreover, the method further comprises the steps of: determine the voltage (V) of the response signal and the current (I) of the excitation of the oscillatory response signal; measuring the attenuation characteristic (ζ) of the flow meter; and the stiffness parameter (K) is determined from the frequency (ω ₀ ), voltage (V) of the response signal, excitation current (I), and attenuation characteristic (ζ). 6. The method according to claim 5, in which the measurement of the attenuation characteristic (ζ) further comprises the step of allowing the oscillatory response of the flow meter (5) to attenuate up to a predetermined base of the oscillation reference. 7. The method according to claim 5, in which the measurement of the characteristic (ζ) attenuation further comprises the step of: remove the excitation of the flow meter; and provide the oscillatory response of the flowmeter with the ability to attenuate up to a predetermined base of the oscillation reference along with the attenuation characteristic being measured. 8. The method according to claim 5, in which the stiffness parameter (K) is K = (I · BL _PO · BL _DR · ω ₀ ) / 2ζV. 9. A method for determining a change (ΔK) in stiffness in a flowmeter, the method comprises the steps of: receiving an oscillatory response signal from the flowmeter, the vibrational response signal containing a response signal to the vibration of the flowmeter at a substantially resonant frequency, and determining the frequency (ω ₀ ) an oscillatory response signal, moreover, the method further comprises the steps of: determine the voltage (V) of the response signal and the current (I) of the excitation of the oscillatory response signal; measuring the attenuation characteristic (ζ) of the flow meter; determining the stiffness parameter (K) by the frequency (ω ₀ ), voltage (V) of the response signal, excitation current (I) and attenuation characteristics (ζ); receive a second oscillatory response signal from the flow meter at the second time moment t ₂ ; generating a second stiffness characteristic (K ₂ ) by a second oscillatory response signal; comparing a second stiffness characteristic (K ₂ ) with a stiffness parameter (K); and a change in stiffness (ΔK) is recorded if the second stiffness characteristic (K ₂ ) differs from the stiffness parameter (K) by more than a predetermined tolerance. 10. The method according to claim 9, further comprising registering a change (ΔK) in stiffness if the second stiffness characteristic (K ₂ ) differs from the stiffness parameter (K) by more than a predetermined stiffness tolerance. 11. The method according to claim 9, further comprising the step of quantifying the change (ΔK) of stiffness from comparison. 12. The method according to claim 9, in which the measurement of the attenuation characteristic (ζ) further comprises the step of allowing the oscillatory response of the flowmeter to attenuate up to a predetermined base of oscillation reference. 13. The method according to claim 9, in which the measurement of the characteristic (ζ) attenuation further comprises the steps of: remove the excitation of the flow meter; and provide the oscillatory response of the flowmeter with the ability to attenuate up to a predetermined base of the oscillation reference along with the attenuation characteristic being measured. 14. The method according to claim 9, in which the stiffness parameter (K) is K = (I · BL _PO · BL _DR · ω ₀ ) / 2ζV. 15. The method according to claim 9, in which the formation of the second characteristic (K ₂ ) stiffness from the second oscillatory response signal comprises the step of forming a second characteristic (K ₂ ) stiffness from the second frequency, the second voltage of the response signal, the second excitation current and the second damping characteristic. 16. Measuring electronics (20) for the flow meter (5), measuring electronics (20) comprises an interface (201) for receiving three or more vibrational response signals from the flowmeter (5), moreover, three or more vibrational response signals include a response signal essentially the fundamental frequency and two or more non-fundamental frequency response signals, and a data processing system (203) connected to the interface (201), moreover, the measuring electronics (20) further comprises: a data processing system (203) that is configured to receive three or more vibrational response signals from the interface (201), generate an amplitude-frequency characteristic minus three or more vibrational response signals in the pole, and determine at least a parameter (K ) stiffness according to the amplitude-frequency characteristics minus the pole. 17. Measuring electronics (20) according to clause 16, in which the data processing system (203) is further configured to determine damping parameter (C) from the amplitude-frequency characteristic minus the pole. 18. Measuring electronics (20) according to clause 16, in which the data processing system (203) is further configured to determine the mass parameter (M) from the amplitude-frequency characteristic minus the pole. 19. Measuring electronics (20) according to clause 16, in which the data processing system (203) is further configured to calculate the pole (λ), the left deduction (R _L ) and the right deduction (R _R ) from the amplitude-frequency characteristic minus the pole. 20. Measuring electronics (20) according to clause 16, in which three or more oscillatory response signals contain at least one tone above the response of the fundamental frequency and at least one tone below the response of the fundamental frequency. 21. Measuring electronics (20) according to clause 16, in which three or more oscillatory response signals contain at least two tones above the response of the fundamental frequency and at least two tones below the response of the fundamental frequency. 22. Measuring electronics (20) according to clause 16, in which the amplitude-frequency characteristic minus the pole contains the amplitude-frequency characteristic minus the first-order pole. 23. Measuring electronics (20) according to clause 16, in which the amplitude-frequency characteristic minus the pole contains the amplitude-frequency characteristic minus the first-order pole, which is

. 24. Measuring electronics (20) according to clause 16, in which the amplitude-frequency characteristic minus the pole contains the amplitude-frequency characteristic minus the first-order pole, which is

and at the same time, the stiffness parameter (K), the damping parameter (C) and the mass parameter (M) are determined according to the Equations M = 1 / 2jRω _d , K = (ω _n ) ² M and C = 2ζω _n M. 25. Measuring electronics (20) according to clause 16, in which the amplitude-frequency characteristic minus the pole contains the amplitude-frequency characteristic minus the second-order pole. 26. Measuring electronics (20) according to clause 16, in which the amplitude-frequency characteristic minus the pole contains the amplitude-frequency characteristic minus the second-order pole, which is

. 27. Measuring electronics (20) according to clause 16, in which the amplitude-frequency characteristic minus the pole contains the amplitude-frequency characteristic minus the second-order pole, which is

, and in this case, the stiffness parameter (K) is determined according to

, the mass parameter (M) is determined according to M = K / (ω _n ) ² , and the damping parameter (C) is determined according to

. 28. The method for determining the parameter (K) of the stiffness of the flow meter, the method comprises the steps of: receiving three or more vibrational response signals, wherein three or more vibrational response signals include a substantially fundamental frequency response signal and two or more non-fundamental frequency response signals; forming an amplitude-frequency characteristic minus three or more vibrational response signals in the pole; and determining at least stiffness parameter (K) from the amplitude-frequency characteristic minus the pole. 29. The method of claim 28, further comprising determining a damping parameter (C) from the amplitude-frequency characteristic minus the pole. 30. The method according to p. 28, further comprising the step of determining the mass parameter (M) from the amplitude-frequency characteristic minus the pole. 31. The method of claim 28, further comprising calculating a pole (λ), a left deduction (R _L ), and a right deduction (R _R ) from the amplitude-frequency characteristic with a deduction in the pole. 32. The method according to p, in which three or more oscillatory response signals contain at least one tone above the response of the fundamental frequency and at least one tone below the response of the fundamental frequency. 33. The method according to p, in which three or more oscillatory response signals contain at least two tones above the response of the fundamental frequency and at least two tones below the response of the fundamental frequency. 34. The method of claim 28, wherein the amplitude-frequency characteristic with a residue in the pole comprises an amplitude-frequency characteristic with a residue in the first-order pole. 35. The method according to p. 28, in which the amplitude-frequency characteristic minus the pole contains the amplitude-frequency characteristic minus the pole of the first order, which is

. 36. The method according to p, in which the amplitude-frequency characteristic minus the pole contains the amplitude-frequency characteristic minus the pole of the first order, which is

and at the same time, the stiffness parameter (K), the damping parameter (C) and the mass parameter (M) are determined according to the Equations M = 1 / 2jRω _d , K = (ω _n ) ² M and C = 2ζω _n M. 37. The method of claim 28, wherein the amplitude-frequency characteristic minus the pole contains the amplitude-frequency characteristic minus the second-order pole. 38. The method according to p. 28, in which the amplitude-frequency characteristic minus the pole contains the amplitude-frequency characteristic minus the second-order pole, which is

. 39. The method according to p, in which the amplitude-frequency characteristic minus the pole contains the amplitude-frequency characteristic minus the pole of the second order, which is

in this case, the stiffness parameter (K) is determined according to

, the mass parameter (M) is determined according to M = K / (ω _n ) ² , and the damping parameter (C) is determined according to

. 40. The method according to p, optionally containing stages in which: take a second set of three or more oscillatory response signals from the flow meter at the second time moment t ₂ ; generating a second stiffness characteristic (K ₂ ) from a second set of three or more vibrational response signals; comparing a second stiffness characteristic (K ₂ ) with a stiffness parameter (K); and a change in stiffness (ΔK) is recorded if the second stiffness characteristic (K ₂ ) differs from the stiffness parameter (K) by more than a predetermined tolerance. 41. The method of claim 40, further comprising detecting a change (ΔK) in stiffness if the second stiffness characteristic (K ₂ ) differs from the stiffness parameter (K) by more than a predetermined stiffness tolerance. 42. The method according to clause 40, further comprising the step of quantifying the change (ΔK) of stiffness from a comparison of K and K ₂ . 43. A method for determining a change (ΔK) in the rigidity of a flow meter, comprising the steps of: receiving three or more vibrational response signals, wherein three or more vibrational response signals include a substantially fundamental frequency response signal and two or more non-fundamental frequency response signals; generating an amplitude-frequency characteristic minus three or more oscillatory response signals in the pole; determining at least stiffness parameter (K) from the amplitude-frequency characteristic minus the pole; take a second set of three or more oscillatory response signals from the flow meter at the second time moment t ₂ ; generating a second stiffness characteristic (K ₂ ) from a second set of three or more vibrational response signals; comparing a second stiffness characteristic (K ₂ ) with a stiffness parameter (K); and detect a change (ΔK) in stiffness if the second stiffness characteristic (K ₂ ) differs from the stiffness parameter (K) by more than a predetermined tolerance. 44. The method according to item 43, further comprising detecting a change in stiffness (ΔK) if the second stiffness characteristic (K ₂ ) differs from the stiffness parameter (K) by more than a predetermined stiffness tolerance. 45. The method according to item 43, further comprising the step of quantifying the change (ΔK) of stiffness from a comparison of K and K ₂ . 46. The method according to item 43, in which the definition further comprises determining a damping parameter (C) from the amplitude-frequency characteristic minus the pole. 47. The method according to item 43, in which the determination further comprises determining a mass parameter (M) from the amplitude-frequency characteristic minus the pole. 48. The method according to item 43, in which the definition further comprises calculating the pole (λ), the left residue (R _L ) and the right residue (R _R ) according to the amplitude-frequency characteristic with a residue in the pole. 49. The method according to item 43, in which three or more oscillatory response signals contain at least one tone above the response signal of the fundamental frequency and at least one tone below the response signal of the fundamental frequency. 50. The method according to item 43, in which three or more oscillatory response signals contain at least two tones above the response of the fundamental frequency and at least two tones below the response of the fundamental frequency. 51. The method according to item 43, in which the amplitude-frequency characteristic with deduction in the pole contains the amplitude-frequency characteristic with deduction in the pole of the first order. 52. The method of claim 43, wherein the amplitude-frequency characteristic minus the pole contains the amplitude-frequency characteristic minus the first-order pole, which is

. 53. The method according to item 43, wherein the amplitude-frequency characteristic minus the pole contains the amplitude-frequency characteristic minus the first-order pole, which is

and at the same time, the stiffness parameter (K), the damping parameter (C) and the mass parameter (M) are determined according to the Equations M = 1 / 2jRω _d , K = (ω _n ) ² M and C = 2ζω _n M. 54. The method according to item 43, in which the amplitude-frequency characteristic with deduction in the pole contains the amplitude-frequency characteristic with deduction in the pole of the second order. 55. The method according to item 43, in which the amplitude-frequency characteristic minus the pole contains the amplitude-frequency characteristic minus the second-order pole, which is

. 56. The method according to item 43, in which the amplitude-frequency characteristic minus the pole contains the amplitude-frequency characteristic minus the second-order pole, which is

wherein, the stiffness parameter (K) is determined according to

, the mass parameter (M) is determined according to M = K / (ω _n ) ² , and the damping parameter (C) is determined according to

.