Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Mechanical measurement system
Patent
1997-04-09
1999-10-12
Wachsman, Hal Dodge
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Mechanical measurement system
702 45, 702 50, 702114, 702138, 3645281, 36452817, 36452836, 303 3, 303 15, 303 33, 701 70, B60T 1366
Patent
active
059666749
ABSTRACT:
Method and apparatus for providing a filtered signal which indicates of a flow of fluid to a fluid pressure communication conduit, the flow being dependent upon the pressure of fluid in a chamber. The pressure in the chamber is controlled by one or more pressure adjusting valves. The invention provides for receiving into a data processing module one or more valve signals indicating open states of the pressure adjusting valve or valves, and also a flowrate signal from a flowrate sensor, which represents the real instantaneous flowrate, and it is this signal which needs to be filtered to remove transients. The invention provides for choosing between a first processing mode and a second processing mode for the flowrate signal. The first processing mode is used when the second processing mode is not in effect, and when neither of the valve signals indicates an open valve. The second processing mode is activated a valve signal indicates an open valve. The second processing mode, when activated, proceeds according to a predetermined procedure and then returns to the first processing mode after no valve signal indicates an open valve. The signal is processed by either the first processing mode or the second processing mode, depending on whether valve signals have been received, and provides the filtered signal as an output to equipment external to the data processing module.
REFERENCES:
patent: 3957314 (1976-05-01), Falke
patent: 5286096 (1994-02-01), Ferri et al.
patent: 5796637 (1998-08-01), Glew et al.
Bailey Gary
Crawford Charles
Dimsa Robert D.
Ferri Vincent
Wachsman Hal Dodge
Westinghouse Air Brake Company
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