V-shaped channel zero drift elimination method

A sound channel, zero-drift technology, applied in the direction of instruments, measuring devices, measuring flow/mass flow, etc., can solve the problems of measurement accuracy drop, ultrasonic propagation time delay, affecting fluid flow velocity measurement, etc., to eliminate calculation accuracy The effect of the impact, flow rate and flow data is accurate and accurate detection

Active Publication Date: 2022-04-01
德闻仪器仪表(上海)有限公司
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Problems solved by technology

[0002] Ultrasonic flowmeters are widely used in pipelines to measure gas, water and other fluids. Ultrasonic flowmeters use the time-of-flight method to measure the flow velocity of fluids. Due to the problem of zero drift in their internal circuits, ultrasonic waves propagate in the sound channel when used. Time includes a delay, which affects the flow rate measurement of the fluid, resulting in a decrease in its measurement accuracy
In the prior art, the delay can only be measured when the fluid flow rate is 0, but in practical applications, the condition of the fluid flow rate being 0 cannot be met, and thus cannot be applied to the actual ultrasonic flowmeter

Method used

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Embodiment Construction

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0038] The method for eliminating zero drift of the V-shaped sound channel in this embodiment is realized by using the following ultrasonic flowmeter.

[0039] like figure 1 As shown, the ultrasonic flowmeter specifically includes a first ultrasonic transducer SEN1 arranged on the wall surface of the flow channel, and a second ultrasonic transducer SEN1 arranged at intervals along the fluid flow direction on the flow channel relative to the wall surface of the first ultrasonic transducer SEN1 The ultrasonic transducer SEN2 and the third ultrasonic transducer SEN3, wherein the second ultrasonic transducer SEN2, the first ultrasonic transducer SEN1, and the third ultrasonic transducer SEN3 are arranged in sequence along the flow direction of the channel, and the second ultrasonic transducer The transducer SEN2 and the third ultrasonic transduce...

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Abstract

The invention relates to a method for eliminating zero drift of a V-shaped sound channel. The ultrasonic flowmeter includes three ultrasonic transducers arranged in a triangle, and the second ultrasonic transducer and the third ultrasonic transducer are opposite to the first ultrasonic transducer. The energy devices are arranged symmetrically. Get Ta, get Tb, calculate the time difference in the process; get Tc, get Td, calculate the time difference in the process; according to and calculate the zero drift time of the ultrasonic flowmeter, the ultrasonic flowmeter eliminates the zero drift time to calculate The fluid flow velocity V in the flow channel, and then calculate the flow rate in the flow channel according to V and the cross-sectional area of ​​the flow channel. The zero drift elimination method of the V-shaped sound channel in the present invention can calculate the zero drift time data and eliminate the zero drift time to realize the calculation of the flow velocity and the flow rate in the flow channel, and the calculated data is more accurate.

Description

technical field [0001] The invention relates to a method for eliminating zero drift of a V-shaped sound channel. Background technique [0002] Ultrasonic flowmeters are widely used in pipelines to measure gas, water and other fluids. Ultrasonic flowmeters use the time-of-flight method to measure the flow velocity of fluids. Due to the problem of zero drift in their internal circuits, ultrasonic waves propagate in the sound channel when used. Time includes delay, which affects the flow rate measurement of the fluid, which in turn leads to a decrease in the accuracy of its measurement. In the prior art, the time delay can only be measured when the fluid flow rate is 0, but in practical applications, the condition of the fluid flow rate being 0 cannot be met, and thus cannot be applied to an actual ultrasonic flowmeter. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a V-shaped channel zero drift elimination method...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F1/667G01F25/00
CPCG01F1/66G01F25/10
Inventor 张宴槐杨鸣金思远白璐毛佳敏李金泓赵文华邹燕妮叶晨曦
Owner 德闻仪器仪表(上海)有限公司
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