Patent
Method and apparatus for adaptive line enhancement in coriolis mass flow meter measurement
TLDR
In this article, an adaptive notch filter is used to enhance the signal from each corresponding sensor signal on the vibrating flow tubes, and a plurality of adaptive notch filters are cascaded to enhance each sensor signal.Abstract:
An apparatus and method for determining frequency and phase relationships of vibrating flow tubes in a Coriolis mass flow meter. Adaptive line enhancement (ALE) techniques and apparatus are used in a digital signal processing (DSP) device to accurately determine frequency and phase relationships of the vibrating flow tube and to thereby more accurately determine mass flow rate of a material flowing through the mass flow meter. In a first embodiment, an adaptive notch filter is used to enhance the signal from each corresponding sensor signal on the vibrating flow tubes. In a second embodiment, a plurality of adaptive notch filters are cascaded to enhance the signal from each corresponding sensor signal. In both embodiments, an antialiasing decimation filter associated with each sensor signal reduces the computational complexity by reducing the number of samples from a fixed frequency A/D sampling device associated with each sensor signal. Computational adjustments are performed to compensate for spectral leakage between the fixed sampling frequency and the variable fundamental frequency of the vibrating flow tubes. Despite this added computational complexity, the present invention is simpler than prior designs and provides better noise immunity due to the adaptive notch filtration. Heuristics are applied to the weight adaptation algorithms of the notch filters to improve convergence of the digital filters and to reduce the possibility of instability of the filters interfering with mass flow measurements.read more
Citations
More filters
Patent
Method and Apparatus for Providing Data Processing and Control in a Medical Communication System
TL;DR: Methods and apparatus for providing data processing and control for use in a medical communication system are provided in this article, where the authors present a set of protocols for using medical data in medical communication systems.
Patent
Displays for a medical device
Wesley Scott Harper,Annie C. Tan,Timothy C. Dunn,Mark Kent Sloan,Kenneth J. Doniger,Michael Love,Phillip Yee,Gary Alan Hayter,R. Curtis Jennewine,Glenn Howard Berman +9 more
TL;DR: In this article, the authors describe an analyte monitoring device having a user interface with a display and a plurality of actuators, including a home screen and an alert screen, which is configured to render a plurality display screens, including an alert display in place of the home screen when an alarm condition is detected.
PatentDOI
Process device diagnostics using process variable sensor signal
TL;DR: In this article, a process variable sensor (138) senses vibration noise signals (132) carried in a process fluid of the process, such as by operation of process control elements, and analyzes the isolated signal to diagnose the process and the process devices.
Patent
Method and system for providing calibration of an analyte sensor in an analyte monitoring system
TL;DR: In this paper, a method and apparatus for providing calibration of analyte sensor including applying a control signal, detecting a measured response to the control signal and determining a variance in the detected measured response, and estimating a sensor sensitivity based on the variance of the measured measured response is provided.
Patent
Correcting for two-phase flow in a digital flowmeter
Manus Henry,M.J. Fuente +1 more
TL;DR: In this article, a flowmeter with a vibratable conduit and a driver connected to the conduit that is operable to impart motion to the flowmeter is disclosed, and a controller is connected to receive the sensor signal.
References
More filters
Patent
Parallel path Coriolis mass flow rate meter
TL;DR: In this article, a flow meter for measuring the mass flow rates of fluids passed through two essentially parallel, cantilever mounted U-shaped flow tubes where, instead of the fluid serially passing through one of the U-shape flow tubes and then through the second U shape flow tube, the fluid is essentially evenly divided and half of the fluids is passed through one U shape and the other half of them are passed through the other shape.
Patent
Coriolis mass flow rate meter having a substantially increased noise immunity
TL;DR: In this paper, a Coriolis mass flow rate meter that is substantially immune to noise has been proposed, where the phase difference that occurs between real and imaginary components of the discrete Fourier transform (DFT) of both the left and right velocity sensor waveforms evaluated at the fundamental frequency at which the flow tubes vibrate is measured.
Patent
Method and apparatus for mass flow rate measurement
TL;DR: In this paper, a Coriolis flow meter equipped with sensors which measure acceleration, velocity, or position of each side leg of an oscillating U-shaped conduit through which the fluid is passed is used.
Patent
Method and structure for flow measurement
TL;DR: In this paper, a substantially "U" shaped conduit is mounted in a cantilever manner at the legs of the conduit, and sensors mounted on the conduit can measure the Coriolis force by sensing incipient movement around the axis and generating and measuring a nulling force.
Patent
A flow tube drive circuit having a bursty output for use in a coriolis meter
TL;DR: In this article, the authors present a drive circuit for providing bursts, rather than continuously alternating amounts, of energy for use in driving a flow tube (conduit) in a Coriolis meter.