Unlock instant, AI-driven research and patent intelligence for your innovation.

Ultrasonic flowmeter

An ultrasonic and flowmeter technology, applied in the field of ultrasonic flow detection, can solve problems such as difficult installation and large measurement errors

Active Publication Date: 2020-07-07
上海迅音科技有限公司
View PDF11 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an ultrasonic flowmeter to solve the problems of difficulty in installing ultrasonic flowmeters in small-diameter pipelines and large measurement errors in the prior art

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ultrasonic flowmeter
  • Ultrasonic flowmeter
  • Ultrasonic flowmeter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] As mentioned in the background technology, the existing ultrasonic flowmeters are difficult to install in small-diameter pipelines, and during the measurement process, the acoustic path of ultrasonic waves in the pipeline is relatively short, and the difference in propagation time or phase of ultrasonic waves in the upstream and downstream directions The difference is not large, resulting in insufficient system resolution and large measurement errors. In view of this, the present embodiment provides an ultrasonic flowmeter, which is especially suitable for measuring the liquid flow in small-diameter pipelines. figure 1 It is a schematic structural diagram of an ultrasonic flowmeter provided in this embodiment, please refer to figure 1 , the ultrasonic flowmeter includes an ultrasonic sensor, a fluid pipeline, an ultrasonic flow measurement circuit and a software system (not shown in the figure), the fluid pipeline is coupled to the ultrasonic sensor, and the ultrasonic ...

Embodiment 2

[0050] The difference from Embodiment 1 is that in the ultrasonic flowmeter in this embodiment, the fluid pipeline is processed separately, and the pipeline main body 22 and the waveguide structure 21 are processed separately and connected by mechanical compression. Forming, or ultrasonic welding forming or connecting and forming by bonding.

[0051] Specifically, such as image 3 As shown, the two waveguide structures 21 are processed into two solid cylindrical structures, and their inner diameters are slightly larger than the outer diameter of the pipeline main body 22, and then the two are tightly connected. Specifically, the The pipeline main body 22 and the waveguide structure 21 can be compressed mechanically, or adhesive, grease or high-viscosity materials can be used for adhesive connection and molding, so as to ensure the smoothness of the connection between the two. Tightness and easy processing.

Embodiment 3

[0053] The difference from Embodiment 2 is that in the ultrasonic flowmeter of this embodiment, the fluid pipeline is divided into at least two parts and processed separately, and two parts include a waveguide structure 21 and a part of pipeline main body 22 .

[0054] Specifically, see Figure 4 , for the convenience of processing, the fluid pipeline 22 and the waveguide structure 21 are divided into three parts for processing, two of which include a waveguide structure 21 and a part of the pipeline body 22, and the other part only includes a part of the pipeline body 22, Then they are tightly connected together in turn, and the connection method is not specifically limited, and mechanical methods, or bonding, or welding can be used.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an ultrasonic flowmeter, which comprises two ultrasonic transducers, a fluid pipeline, an ultrasonic flow measurement circuit and a software system, wherein the fluid pipeline comprises a pipeline main body and two wave guide structures, the pipeline main body is in a straight pipe shape, the two wave guide structures are arranged on the periphery of the pipeline main body at a certain interval, the opposite end faces of the two wave guide structures are two coupling interfaces, and the two ultrasonic transducers are in coupling connection with the fluid pipeline on thetwo coupling interfaces respectively. According to the invention, ultrasonic waves emitted by one ultrasonic transducer are diffused into a liquid to be measured in the pipeline main body through thewave guide structure, the ultrasonic waves effectively enter the liquid to be measured and can be transmitted in the pipeline main body so as to be received by the other ultrasonic transducer, so thatthe acoustic path of ultrasonic waves is lengthened. The straight pipe-shaped design of the pipeline main body can reduce the pressure loss, the ultrasonic wave conveying efficiency of the liquid tobe measured is improved, the measurement error is reduced, and the flow measurement of the liquid in the small-diameter pipeline is facilitated.

Description

technical field [0001] The invention relates to the technical field of ultrasonic flow detection, in particular to an ultrasonic flowmeter. Background technique [0002] Ultrasonic flowmeters usually use the piezoelectric effect of piezoelectric materials, and use an appropriate transmitting circuit to add electrical energy to the piezoelectric element of the transmitting transducer to generate ultrasonic vibrations. Ultrasonic waves are injected into the fluid pipeline from a certain direction, then received by the receiving transducer, and converted into electrical energy by piezoelectric elements for detection. According to the principle of signal detection, ultrasonic flowmeters mainly use two types of time difference method and Doppler method. The Doppler method uses the principle of acoustic Doppler to determine the fluid flow rate by measuring the ultrasonic Doppler frequency shift scattered by the scattering body in the inhomogeneous fluid. It is suitable for the me...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01F1/66G01F15/18
CPCG01F1/667G01F15/185
Inventor 沈西琳张宇明
Owner 上海迅音科技有限公司