Abstract: A method of determining a corrected measured flow rate is provided. The method includes measuring a flow rate with a first flow meter, measuring a flow rate with a second flow meter, the second flow meter being fluidly coupled to the first flow meter in series, and correcting the measured flow rate of the first flow meter with the measured flow rate of the second flow meter.

Abstract: A meter electronics (100) for two or more meter assemblies (10a, 10b). The meter electronics (100) includes a processor (110) and one or more signal processors (120) communicatively coupled to the processor (110). The one or more signal processors (120) are configured to communicatively couple to a first meter assembly (10a) and a second meter assembly (10b). Accordingly, only one meter electronics can be employed to control the two or more meter assemblies, which may reduce the costs associated with employing two meter electronics.

Abstract: A method for temperature compensation of a signal in a vibratory meter is provided. The method includes obtaining one or more signals from a meter assembly in the vibratory meter, providing the one or more signals to a meter electronics of the vibratory meter, and compensating the one or more signals with a signal parameter offset, wherein the signal parameter offset is based on a temperature of the meter electronics.

Abstract: A method of determining a corrected measured flow rate is provided. The method includes measuring a flow rate with a first flow meter, measuring a flow rate with a second flow meter, the second flow meter being fluidly coupled to the first flow meter in series, and correcting the measured flow rate of the first flow meter with the measured flow rate of the second flow meter.

Abstract: A meter electronics (100) for two or more meter assemblies (10a, 10b). The meter electronics (100) includes a processor (110) and one or more signal processors (120) communicatively coupled to the processor (110). The one or more signal processors (120) are configured to communicatively couple to a first meter assembly (10a) and a second meter assembly (10b). Accordingly, only one meter electronics can be employed to control the two or more meter assemblies, which may reduce the costs associated with employing two meter electronics.

Abstract: A method for temperature compensation of a signal in a vibratory meter is provided. The method includes obtaining one or more signals from a meter assembly in the vibratory meter, providing the one or more signals to a meter electronics of the vibratory meter, and compensating the one or more signals with a signal parameter offset, wherein the signal parameter offset is based on a temperature of the meter electronics.

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.

Abstract: A flow device is provided. The flow device includes at least one conduit (20) and a pick-off (30) providing a pick-off signal (35) for measuring motion of the at least one conduit (20). The flow device also includes a drive (40) that receives a first signal (55) for vibrating the at least one conduit (20) at a resonance frequency and that receives a second signal (56) for vibrating the at least one conduit at a frequency that is different than the resonance frequency. One or more electronics (50) is provided. The one or more electronics (50) generates the first and second signals (55, 56), receives the pick-off signal (35) from the pick-off (30), and measures changes in a time shift between the second signal (56) frequency applied by the drive (40) and the second signal (56) frequency detected by the pick-off (30).

Abstract: Meter electronics (20) and methods for detecting a flow anomaly in a flow material flowing through a flow meter (5) are provided. The meter electronics (20) includes an interface (201) for receiving a vibrational response of the flow material, with the vibrational response including at least a first sensor signal and a second sensor signal, and a processing system (203) in communication with the interface (201). The processing system (203) is configured to receive the vibrational response from the interface (201), generate a ninety degree phase shift from the first sensor signal and generate at least one flow characteristic using at least the first sensor signal and the ninety degree phase shift, compare the at least one flow characteristic to at least one anomaly profile, detect a shift in the vibrational response if the at least one flow characteristic falls within the anomaly profile, and indicate an anomaly condition as a result of the detecting.

Abstract: The present invention relates to flow devices that measure a characteristic of a flowing substance and methods for operating flow devices. In one embodiment, a drive (40) is provided that receives a first signal (55) for vibrating at least one conduit (20) at a resonance frequency and a second signal (56) for vibrating the at least one conduit (20) at a frequency that is different than the resonance frequency. In another embodiment, a drive (140) is provided that alternates between receiving a drive signal (155) to vibrate at least one conduit (120) at a resonance frequency and providing a pick-off signal (145) for measuring motion of the at least one conduit (120). In another embodiment, one or more electronics (50, 150) are provided that determine a mode of vibration of at least one conduit (20, 120) and compare the determined mode of vibration to one or more reference modes of vibration to determine whether a substance is flowing within the at least one conduit (20, 120).

Abstract: Meter electronics (20) and methods for detecting a flow anomaly in a flow material flowing through a flow meter (5) are provided. The meter electronics (20) includes an interface (201) for receiving a vibrational response of the flow material, with the vibrational response including at least a first sensor signal and a second sensor signal, and a processing system (203) in communication with the interface (201). The processing system (203) is configured to receive the vibrational response from the interface (201), generate a ninety degree phase shift from the first sensor signal and generate at least one flow characteristic using at least the first sensor signal and the ninety degree phase shift, compare the at least one flow characteristic to at least one anomaly profile, detect a shift in the vibrational response if the at least one flow characteristic falls within the anomaly profile, and indicate an anomaly condition as a result of the detecting.

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.

Abstract: A system for initializing parameters in a drive circuit. This invention applies initial drive signals to a drive circuit which causes said flow tube to vibrate. The configuration of the flow tube is then determined from pick-off signals received from pick-off sensors associated with the flow tube. Parameters for generation of said drive signals are then set based upon the configuration of said flow tube.

Abstract: A system for initializing parameters in a drive circuit. This invention applies initial drive signals to a drive circuit which causes said flow tube to vibrate. The configuration of the flow tube is then determined from pick-off signals received from pick-off sensors associated with the flow tube. Parameters for generation of said drive signals are then set based upon the configuration of said flow tube.

Abstract: A communication system uses the current waveform of an electricity distribution network as a carrier, the signal being present as current pulses around four predetermined zero crossings. The current waveform is sampled around the voltage zero crossings to obtain a time-ordered set of waveform values. The ordered waveform values for each bit are examined to determine if the values fall within preset criteria indicative of a stable carrier. When the ordered waveform values for a particular bit all fall within the preset criteria, that particular bit is identified as a good bit. When at least some of the ordered waveform values for a particular bit fall outside the preset criteria, that particular bit is labelled as suspect. The ordered values of each suspect bit and of adjacent bits are tested to determine whether four successive values meets the preset stability criteria, and whether the four successive values indicating a stable carrier include at least two succesive values from the suspect bit.