Method of checking the presence of a pipeline connection between two end points
First Claim
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1. A method of checking the existence of a connection between two end points of a pipeline, said method comprising:
- producing acoustic signals at one end point with a transmitter in the pipeline, the frequency of the acoustic signals being above the frequency of ambient noises and below an upper limit which results from the formula f=c/2d, in which f is the frequency, c the acoustic velocity of the material in the tube (gas, fluid), and d the inside diameter of the pipeline;
converting the acoustic signals into an electrical signal by an acoustic sensor at the other end point; and
comparing the electrical signal with a threshold value;
wherein;
the presence of a pipeline connection is indicated when said electrical signal exceeds said threshold value.
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Abstract
The presence of pipeline connections can be checked by the transmitting of acoustic signals from a transmitter to an acoustic sensor within the pipe. This method is used in particular in the manufacture of cigarettes.
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11 Claims
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1. A method of checking the existence of a connection between two end points of a pipeline, said method comprising:
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producing acoustic signals at one end point with a transmitter in the pipeline, the frequency of the acoustic signals being above the frequency of ambient noises and below an upper limit which results from the formula f=c/2d, in which f is the frequency, c the acoustic velocity of the material in the tube (gas, fluid), and d the inside diameter of the pipeline; converting the acoustic signals into an electrical signal by an acoustic sensor at the other end point; and comparing the electrical signal with a threshold value;
wherein;the presence of a pipeline connection is indicated when said electrical signal exceeds said threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification