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Ultrasonic flowmeter

An ultrasonic and flowmeter technology, which is applied in the direction of fluid velocity measurement, flow/mass flow measurement, liquid/fluid solid measurement, etc., can solve the problems of high cost and difficulty in popularization and use, and achieve the goal of improving measurement resolution and accurate measurement results Effect

Inactive Publication Date: 2014-06-11
XIAN JIAOTONG UNIV JINGSHENG SCI & TECH DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the measurement of the propagation time difference is involved during the period, and the time difference is often a very small value, most of the current ultrasonic flowmeters measure it directly, requiring many precision components to match, and the cost is very high, making it difficult to popularize and use

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  • Ultrasonic flowmeter

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Embodiment Construction

[0008] The present invention will be described in more detail below in conjunction with the accompanying drawings and embodiments.

[0009] As shown in the figure, the present invention is an ultrasonic flowmeter, including ultrasonic transducer 1 and ultrasonic transducer 2 arranged obliquely along the fluid flow direction, and ultrasonic transducer 1 and ultrasonic transducer 2 are connected to the MCU. , the MCU controls the transmission and reception of ultrasonic signals, the ultrasonic transducer one is connected to the direct digital frequency synthesizer one, the ultrasonic transducer two is connected to the direct digital frequency synthesizer two, the direct digital frequency synthesizer one and the direct digital frequency synthesis The output of the second device is connected to the multiplier, the output of the multiplier is connected to the filter, the output of the filter is connected to the A / D converter, and the output of the A / D converter is connected to the M...

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Abstract

The invention relates to an ultrasonic flowmeter, which comprises an ultrasonic transducer I and an ultrasonic transducer II, wherein the ultrasonic transducer I and the ultrasonic transducer II are slantwise and oppositely arranged in the flowing direction of fluid, and are respectively connected with an MCU (micro controller unit), the MCU is used for controlling to transmit and receive an ultrasonic signal, the ultrasonic transducer I is directly connected with a digital frequency synthesizer I, the ultrasonic transducer II is directly connected with a digital frequency synthesizer II, the outputs of the ultrasonic transducer I and the ultrasonic transducer II are connected with a multiplier, the output of the multiplier is connected with a filter, the output of the filter is connected with an A / D (analog-to-digital) converter, and the output of the A / C converter is connected with the MCU. The ultrasonic flowmeter has the advantages that the signal time difference between the two ultrasonic transducers can be measured by an indirect method, the measuring result is precise, and the measuring resolution is improved.

Description

technical field [0001] The invention relates to fluid flow detection, in particular to an ultrasonic flowmeter. Background technique [0002] Ultrasonic flowmeters are used for non-contact detection of fluids. They have high measurement accuracy and long service life, and have a good effect on the detection of fluids in large-diameter pipes. However, since the measurement of the propagation time difference is involved in the period, and the time difference is often a very small value, most of the current ultrasonic flowmeters measure it directly, requiring many precision components to match, and the cost is very high, making it difficult to popularize and use. Contents of the invention [0003] In order to overcome the disadvantages of the above-mentioned prior art, the object of the present invention is to provide an ultrasonic flowmeter, which has the characteristics of simple structure and convenient use. [0004] In order to achieve the above object, the technical sch...

Claims

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Application Information

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IPC IPC(8): G01F1/66G01P5/24
Inventor 田边
Owner XIAN JIAOTONG UNIV JINGSHENG SCI & TECH DEV