Flow-rate measurement assembly according to the differential-pressure measurement principle
First Claim
1. A flow-rate measurement assembly for measuring a flow rate of a medium through a measurement pipe, said measurement pipe comprising:
- at least one differential-pressure producer located in the measurement pipe, which differential-pressure producer brings about a reduction of a cross-sectional area through which the medium flows inside the measurement pipe in the region of said differential-pressure producer and thus a drop in the media pressure dependent upon the dimensions of said differential-pressure producer and upon the flow rate;
said measurement assembly comprising;
a differential-pressure measurement transducer for detecting a difference between a high-pressure-side media pressure and a low-pressure-side media pressure and for providing a differential-pressure measurement signal, which depends upon the difference between the high-pressure-side media pressure and the low-pressure-side media pressure, wherein the difference between the high-pressure-side media pressure and the low-pressure-side media pressure is a measure for the flow rate of the medium;
a high-pressure line, which is connected to a high-pressure inlet of said differential-pressure measurement transducer in order to apply the high-pressure-side media pressure to said differential-pressure measurement transducer,a low-pressure line, which is connected to a low-pressure inlet of said differential-pressure measurement transducer in order to apply the low-pressure-side media pressure to said differential-pressure measurement transducer; and
an evaluating unit for evaluating the differential-pressure measurement signal, wherein;
said evaluating unit is designed to;
determine a relationship between the differential-pressure measurement signal and a characteristic parameter of a noise or of a fluctuation in the differential-pressure measurement signal,judge the determination of a monotonically decreasing relationship between the differential-pressure measurement signal and the characteristic parameter to be an indication of a clogged high-pressure line; and
judge the determination of a monotonically increasing relationship between the differential-pressure measurement signal and the characteristic parameter, the monotonically increasing relationship of which is significantly stronger than the monotonically increasing relationship of an unclogged flow-rate measurement assembly, as an indication of a clogged low-pressure line.
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Accused Products
Abstract
A flow-rate measurement assembly for measuring a flow rate of a medium through a measurement pipe, comprising at least one differential-pressure producer, and comprising a differential-pressure measurement transducer for providing a differential-pressure measurement signal, which depends upon the difference between the high-pressure-side media pressure and the low-pressure-side media pressure. The difference is a measure of the flow rate of the medium. The evaluating unit is designed to determine a relationship between the differential-pressure measurement signal and a characteristic parameter of a fluctuation of the differential-pressure measurement signal, to judge the determination of a monotonically decreasing relationship between the differential-pressure measurement signal and the characteristic parameter to be an indication of a clogged high-pressure line, and to judge the determination of a monotonically increasing relationship between the differential-pressure measurement signal and the characteristic parameter, the monotonically increasing relationship of which is significantly stronger than the monotonically increasing relationship of an unclogged flow-rate measurement assembly, as an indication of a clogged low-pressure line.
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Citations
4 Claims
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1. A flow-rate measurement assembly for measuring a flow rate of a medium through a measurement pipe, said measurement pipe comprising:
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at least one differential-pressure producer located in the measurement pipe, which differential-pressure producer brings about a reduction of a cross-sectional area through which the medium flows inside the measurement pipe in the region of said differential-pressure producer and thus a drop in the media pressure dependent upon the dimensions of said differential-pressure producer and upon the flow rate; said measurement assembly comprising; a differential-pressure measurement transducer for detecting a difference between a high-pressure-side media pressure and a low-pressure-side media pressure and for providing a differential-pressure measurement signal, which depends upon the difference between the high-pressure-side media pressure and the low-pressure-side media pressure, wherein the difference between the high-pressure-side media pressure and the low-pressure-side media pressure is a measure for the flow rate of the medium; a high-pressure line, which is connected to a high-pressure inlet of said differential-pressure measurement transducer in order to apply the high-pressure-side media pressure to said differential-pressure measurement transducer, a low-pressure line, which is connected to a low-pressure inlet of said differential-pressure measurement transducer in order to apply the low-pressure-side media pressure to said differential-pressure measurement transducer; and an evaluating unit for evaluating the differential-pressure measurement signal, wherein; said evaluating unit is designed to; determine a relationship between the differential-pressure measurement signal and a characteristic parameter of a noise or of a fluctuation in the differential-pressure measurement signal, judge the determination of a monotonically decreasing relationship between the differential-pressure measurement signal and the characteristic parameter to be an indication of a clogged high-pressure line; and judge the determination of a monotonically increasing relationship between the differential-pressure measurement signal and the characteristic parameter, the monotonically increasing relationship of which is significantly stronger than the monotonically increasing relationship of an unclogged flow-rate measurement assembly, as an indication of a clogged low-pressure line. - View Dependent Claims (2, 3)
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4. A method for monitoring a flow-rate measurement assembly, comprising the method steps of:
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at least temporarily detecting a time curve of the differential-pressure measurement signal and a characteristic parameter of a noise or a fluctuation in the differential-pressure measurement signal; determining a relationship between the differential-pressure measurement signal and a characteristic parameter of a noise or a fluctuation in the differential-pressure measurement signal, wherein the determination of a monotonically decreasing relationship between the differential-pressure measurement signal and the characteristic parameter is to be judged as an indication of a clogged high-pressure line; and the determination of a monotonically increasing relationship between the differential-pressure measurement signal and the characteristic parameter, the monotonically increasing relationship of which is significantly stronger than the monotonically increasing relationship of an unclogged flow-rate measurement assembly, is to be judged as an indication of a clogged low-pressure line.
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Specification