System and method for measuring when fluid has stopped flowing within a line
First Claim
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1. A method for determining when a first fluid having a pressure has stopped flowing within a line, the method comprising:
- applying a time varying amount of energy to a second fluid separated from the first fluid by a membrane;
measuring a pressure of the second fluid in response to the applied energy; and
determining whether the first fluid has stopped flowing based at least on the pressure of the second fluid.
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Abstract
A method and system for determining when a fluid has stopped flowing within a line. The pressure variation in a second fluid, separated from the first by a pumping membrane, is measured in response to energy applied in a time-varying manner to the second fluid. From the response of the second fluid to the applied energy, it is determined whether the first fluid has stopped flowing.
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Citations
8 Claims
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1. A method for determining when a first fluid having a pressure has stopped flowing within a line, the method comprising:
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applying a time varying amount of energy to a second fluid separated from the first fluid by a membrane; measuring a pressure of the second fluid in response to the applied energy; and determining whether the first fluid has stopped flowing based at least on the pressure of the second fluid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification