Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Mechanical measurement system
Reexamination Certificate
2003-06-05
2004-07-27
Nghiem, Michael (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Mechanical measurement system
C705S026640
Reexamination Certificate
active
06768950
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to Coriolis mass flowmeters. More particularly, this invention relates to a computer system for receiving customer orders of Coriolis flowmeters. Still more particularly, this invention relates to a system executed by a server which a customer may access from a remote system and input desired flow parameters and be given choices of Coriolis mass flowmeters to select from to order.
Problem
A Coriolis mass flowmeter measures mass flow and other information of materials flowing through a conduit in the flowmeter. Exemplary Coriolis flowmeters are disclosed in U.S. Pat. No. 4,109,524 of Aug. 29, 1978, U.S. Pat. No. 4,491,025 of Jan. 1, 1985, and U.S. Pat. No. Re. 31,450 of Feb. 11, 1982, all to J. E. Smith et al. These flowmeters have one or more conduits of straight or curved configuration. Each conduit configuration has a set of natural vibration modes, which may be of a simple bending, torsional or coupled type. Each conduit is driven to oscillate at resonance in one of these natural modes. Material flows into the flowmeter from a connected pipeline on the inlet side of the flowmeter, is directed through the conduit or conduits, and exits the flowmeter through the outlet side of the flowmeter. The material flowing through the pipeline may be gas, liquid, solid, and any combination of these three. The natural vibration modes of the vibrating, material filled system are defined in part by the combined mass of the conduits and the material flowing within the conduits.
When there is no flow through the flowmeter, all points along the conduit oscillate due to an applied driver force with identical phase or small initial fixed phase offset. As material begins to flow, Coriolis forces cause each point along the conduit to have a different phase. The phase on the inlet side of the conduit lags the driver, while the phase on the outlet side of the conduit leads the driver. Pick-off sensors on the conduit(s) produce sinusoidal signals representative of the motion of the conduit(s). Signals output from the pick-off sensors are processed to determine the phase difference between the pick-off sensors. The phase difference between two pick-off sensor signals is proportional to the mass flow rate of material through the conduit(s).
There are many different models of Coriolis flowmeters. Micro Motion Inc. of Boulder, Colo., markets many types of Coriolis flowmeters. It is a problem for a user to determine a proper model of Coriolis flowmeter to be used in measuring mass flow rates through a pipeline.
In order to determine the flowmeter model of the proper size and parameters for a pipeline, flow stream parameters for the pipeline must be known. Flow stream parameters include material flow rate, material density, material viscosity, material temperature, and material operating pressure. From these flow stream parameters, parameters for a flowmeter to insert into the pipeline can be determined. Flowmeter parameters include meter accuracy, pressure loss, and material velocity. The flowmeter parameters and flow stream parameters are used to determine the models of flowmeters that can be used to measure mass flow rate in the pipeline.
It is common to use software programs executed by a computer to determine the proper model. However, this requires that meter selection and sizing occur on premises where the computer executing the software resides. Heretofore, there has been no way for a user to log onto a computer to remotely access sizing software and order a desired flowmeter without the intervention of a human operator.
Solution
The above and other problems are solved and an advance in the art is made by a remote sizing and ordering system for a Coriolis flowmeter in accordance with this invention. The present invention allows a user to log in via a network connection. The network connection may either be via a modem, via Internet, via intranet, or any other network connection. The user may then order a flowmeter that fits specification for the pipeline into which the flowmeter is to be inserted. This allows the user to order at any time of day and from anywhere in the world.
In accordance with this invention, a method is provided for remote ordering and configuring of a flowmeter. For the method, a server connects to a computer used by a user that is remotely located from the server. The computer communicates with the server over a network, such as the Internet. The server receives input flow stream parameters from the computer. The server determines flowmeter parameters from the input flow stream parameters. The server determines whether one of the flowmeters is suitable for the flowmeter parameters. The server transmits information on the flowmeters to the computer over the network. The computer displays the flowmeter information to the user. The server receives a selection of one of the flowmeters by the user. The server receives the selection from the computer over the network. The server transmits an order for the selected flowmeter.
The server may transmit a display to the remote computer of configuration options. The user then selects the configuration options and transmits the selected options to the server. The server receives the configuration options from the user. Some of the configuration options include a process connection type, the process connection size, a power supply type which may include either Alternating Current (AC) or Direct Current (DC), and whether to have a local display.
The server may receive the following input flow stream parameters; a flow rate of material, a density of material, a viscosity of material, a temperature of material, and a material operating pressure. The server calculates the following flowmeter parameters from the input flow stream parameters; meter accuracy, pressure loss and fluid velocity.
After the user has configured a flowmeter, the flowmeter configuration may be stored in an electronic shopping cart. The customer then places an order for a flowmeter from configured flowmeters in the shopping cart. The server generates a message and transmits the order to a manufacturing department that produces and ships the flowmeter to the customer.
REFERENCES:
patent: 5687100 (1997-11-01), Butler et al.
patent: 6282518 (2001-08-01), Farrell et al.
patent: 6343517 (2002-02-01), Van Cleve et al.
patent: 6487507 (2002-11-01), Mansfield et al.
patent: 6606570 (2003-08-01), Bugarin et al.
patent: WO/00/46706 (2000-08-01), None
patent: WO/ 02/23425 (2002-03-01), None
Bugarin John R.
Mackin, III James F.
Duft Setter Ollila & Bornsen LLC
Micro Motion Inc.
Nghiem Michael
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