High Speed Frequency and Phase Estimation for Flow Meters
First Claim
1. Meter electronics (20) for processing sensor signals in a flow meter, comprising an interface (201) for receiving a first sensor signal and a second sensor signal and a processing system (203) in communication with the interface (201), with the meter electronics (20) being characterized by:
- the processing system (203) being configured to generate a ninety degree phase shift from the first sensor signal and compute a phase difference using the ninety degree phase shift.
1 Assignment
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Accused Products
Abstract
Meter electronics (20) for processing sensor signals in a flow meter and for computing mass flow rate, density or volume flow rate includes an interface (201) for receiving a first sensor signal and a second sensor signal and a processing system (203) in communication with the interface (201) and configured to generate a ninety degree phase shift from the first sensor signal with a Hilbert transform and compute a phase difference from the ninety degree phase shift, the first sensor signal and the second sensor signal. A frequency is computed from the first sensor signal and the ninety degree phase shift. A second ninety degree phase shift can be generated from the second sensor signal.
16 Citations
66 Claims
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1. Meter electronics (20) for processing sensor signals in a flow meter, comprising an interface (201) for receiving a first sensor signal and a second sensor signal and a processing system (203) in communication with the interface (201), with the meter electronics (20) being characterized by:
the processing system (203) being configured to generate a ninety degree phase shift from the first sensor signal and compute a phase difference using the ninety degree phase shift. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Meter electronics (20) for processing sensor signals in a flow meter, comprising an interface (201) for receiving a first sensor signal and a second sensor signal and a processing system (203) in communication with the interface (201), with the meter electronics (20) being characterized by:
the processing system (203) being configured to generate a first ninety degree phase shift from the first sensor signal and compute a frequency using the first ninety degree phase shift. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for processing sensor signals in a flow meter, the method comprising receiving a first sensor signal and a second sensor signal, with the method being characterized by:
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generating a ninety degree phase shift from the first sensor signal; and computing a phase difference using the ninety degree phase shift. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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27. A method for processing sensor signals in a flow meter, the method comprising receiving a first sensor signal and a second sensor signal, with the method being characterized by:
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generating a ninety degree phase shift from the first sensor signal; and computing a frequency using the ninety degree phase shift. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34)
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35. A method for processing sensor signals in a flow meter, the method comprising receiving a first sensor signal and a second sensor signal, with the method being characterized by:
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generating a ninety degree phase shift from the first sensor signal; computing a phase difference using the ninety degree phase shift; and computing a frequency using the ninety degree phase shift. - View Dependent Claims (36, 37, 38, 39, 40, 41)
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42. A method for processing sensor signals in a flow meter, the method comprising receiving a first sensor signal and a second sensor signal, with the method being characterized by:
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generating a ninety degree phase shift from the first sensor signal; computing a phase difference using the ninety degree phase shift; computing a frequency using the ninety degree phase shift; and computing one or more of a mass flow rate, a density, or a volume flow rate. - View Dependent Claims (43, 44, 45, 46, 47)
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48. A method for processing sensor signals in a flow meter, the method comprising receiving a first sensor signal and a second sensor signal, with the method being characterized by:
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generating a first ninety degree phase shift from the first sensor signal and generating a second ninety degree phase shift from the second sensor signal; and computing a frequency using one of the first ninety degree phase shift or the second ninety degree phase shift. - View Dependent Claims (49, 50, 51, 52, 53, 54)
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55. A method for processing sensor signals in a flow meter, the method comprising receiving a first sensor signal and a second sensor signal, with the method being characterized by:
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generating a first ninety degree phase shift from the first sensor signal and generating a second ninety degree phase shift from the second sensor signal; computing a frequency using one of the first ninety degree phase shift or the second ninety degree phase shift; and computing one or more of a mass flow rate, a density, or a volume flow rate. - View Dependent Claims (56, 57, 58, 59, 60, 61)
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62. A method for processing sensor signals in a flow meter, the method comprising receiving a first sensor signal and a second sensor signal, with the method being characterized by:
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generating a first ninety degree phase shift from the first sensor signal and generating a second ninety degree phase shift from the second sensor signal; computing a frequency using one of the first ninety degree phase shift or the second ninety degree phase shift; computing a phase difference using the first ninety degree phase shift and the second ninety degree phase shift; and computing one or more of a mass flow rate, a density, or a volume flow rate. - View Dependent Claims (63, 64, 65, 66)
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Specification