Ultrasonic flow-measuring method
First Claim
1. An ultrasonic flow-measuring method, whereby the flow rate of a flowing medium through a line is determined by measuring the runtime of an ultrasonic signal that travels from a first ultrasonic transducer to at least one other ultrasonic transducer, comprising the steps ofmeasuring the runtime of the ultrasonic signal as it traverses m-times in immediately consecutive passes a predefined path in the flowing medium over a predefined path length and at a predefined angle relative to the direction of flow;
- measuring the runtime of the ultrasonic signal as it traverses n-times in immediately consecutive passes a predefined path in the flowing medium over a predefined path length and at a predefined angle relative to the direction of flow, where m and n are mutually different integers, and determining the dead time of the ultrasonic flow-measuring process on the basis of the measured runtimes.
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Abstract
An ultrasonic flow-measuring method determines the flow rate of a medium flowing through a line is determined by measuring the runtime of an ultrasonic signal that travels from a first ultrasonic transducer to at least one other ultrasonic transducer. The runtime of the ultrasonic signal as it makes m passes in immediate succession through a predefined path over a predefined path length and at a predefined angle relative to the flow direction is measured, and the runtime of the ultrasonic signal as it makes n passes in immediate succession through the predefined path over the predefined path length at the predefined angle relative to the flow direction is measured, with m and n being mutually different integers, and the dead time of the ultrasonic flow-measuring process is determined on the basis of the measured runtimes. This ultrasonic flow-measuring method permits real-time compensation for the dead time during the actual measuring process, the result being highly accurate measurements.
45 Citations
10 Claims
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1. An ultrasonic flow-measuring method, whereby the flow rate of a flowing medium through a line is determined by measuring the runtime of an ultrasonic signal that travels from a first ultrasonic transducer to at least one other ultrasonic transducer, comprising the steps of
measuring the runtime of the ultrasonic signal as it traverses m-times in immediately consecutive passes a predefined path in the flowing medium over a predefined path length and at a predefined angle relative to the direction of flow; -
measuring the runtime of the ultrasonic signal as it traverses n-times in immediately consecutive passes a predefined path in the flowing medium over a predefined path length and at a predefined angle relative to the direction of flow, where m and n are mutually different integers, and determining the dead time of the ultrasonic flow-measuring process on the basis of the measured runtimes. - View Dependent Claims (2, 3, 4, 5)
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6. An ultrasonic flow-measuring method, whereby the flow rate of a flowing medium through a line is determined by measuring the runtime of an ultrasonic signal that travels from a first ultrasonic transducer to at least one other ultrasonic transducer, comprising the steps of
measuring the runtime of the ultrasonic signal as it traverses m-times in immediately consecutive passes a predefined path in the flowing medium over a predefined path length and at a predefined angle relative to the direction of flow; -
measuring the runtime of the ultrasonic signal as it traverses n-times in immediately consecutive passes a predefined path in the flowing medium over a predefined path length and at a predefined angle relative to the direction of flow, where m and n are mutually different integers, and calculating the dead time td of the ultrasonic flow-measuring process on the basis of the measured runtimes using the formula where tm is the runtime of the ultrasonic signal in an immediate succession of m passes through the predefined path of the predefined length at the predefined angle relative to the flow direction and tn is the runtime of the ultrasonic signal in an immediate succession of n passes through the predefined path of the predefined length at the predefined angle relative to the flow direction. - View Dependent Claims (7, 8, 9, 10)
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Specification