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Metering method of fluid meter

A measurement method and technology of a meter, which are applied in the measurement of flow/mass flow, liquid/fluid solid measurement, and measurement devices, etc., can solve the problems of low measurement accuracy, and achieve the effect of improving measurement accuracy and measurement stability.

Active Publication Date: 2021-04-16
SUZHOU DONGJIAN INTELLIGENT TECH
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AI Technical Summary

Problems solved by technology

Ultrasonic fluid meter is an instrument that uses the principle of ultrasonic time difference to measure fluid flow velocity and flow calculation. However, the measurement accuracy of existing ultrasonic fluid meters is low, and its measurement accuracy is usually above 1L / h, which cannot realize ultra-small flow rate. measure

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  • Metering method of fluid meter

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0028] Such as figure 1 As shown, this embodiment discloses a measurement method for a fluid meter. The fluid meter includes a metering tube, and the metering tube is connected with an ultrasonic transducer group for sending and receiving ultrasonic waves. For example, the ultrasonic transducer group includes two ultra- energy transducer, the metering method includes the following steps:

[0029] 1) Use the ultrasonic transducer group to collect the downstream propagation time and countercurrent propagation time of the ultrasonic wave in the fluid inside the metering tube;

[0030] 2) The travel time difference is obtained by making a difference between the upstream travel time a...

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Abstract

The invention discloses a metering method of a fluid meter. The metering method comprises the following steps of: using an ultrasonic transducer set for collecting downstream propagation time and upstream propagation time of ultrasonic waves in fluid in a metering pipe; subtracting the downstream propagation time from the upstream propagation time to obtain a propagation time difference; judging whether the propagation time difference meets the following conditions: the fluid flow stability distinguishing value is greater than the propagation time difference and less than or equal to the theoretical maximum value; if yes, calculating instantaneous flow according to the propagation time difference and the corrected propagation speed of the ultrasonic waves in the fluid in the metering tube, and performing compensation correction on the calculated instantaneous flow to obtain flow data; and performing optimization weighting processing on the flow data meeting the corresponding conditions to obtain optimal flow values, and finally accumulating and summing the multiple optimal flow values to obtain a total accumulated flow value. According to the invention, the metering precision of the fluid meter is improved, so that the meter can effectively meter ultra-small flow.

Description

technical field [0001] The invention relates to the technical field of fluid metering, in particular to a metering method for a fluid meter. Background technique [0002] The fluid meter is a device used to measure the fluid flow, which is divided into mechanical, electromagnetic and ultrasonic fluid meters. In view of the characteristics of the ultrasonic fluid meter with small pressure loss and not easily affected by the measured water quality, the ultrasonic fluid meter can be widely used. Ultrasonic fluid meter is an instrument that uses the principle of ultrasonic time difference to measure fluid flow velocity and flow calculation. However, the measurement accuracy of existing ultrasonic fluid meters is low, and its measurement accuracy is usually above 1L / h, which cannot realize ultra-small flow rate. Do the metering. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a measurement method for a fluid meter, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/66G01F15/02G01F25/00
CPCY02A20/00
Inventor 张家明李道汉夏木勇
Owner SUZHOU DONGJIAN INTELLIGENT TECH
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