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Target type sensor of liquid speed

A fluid velocity and sensor technology, applied in fluid velocity measurement, velocity/acceleration/impact measurement, instruments, etc., to achieve economical, reliable and responsive effects

Inactive Publication Date: 2006-04-19
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing turbine flowmeters, target flowmeters and many other flow test devices can only measure the fluid flow in closed full pipes, but they are helpless for the measurement of fluid velocity points at any depth in pipelines, especially in partially filled pipes.

Method used

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  • Target type sensor of liquid speed
  • Target type sensor of liquid speed
  • Target type sensor of liquid speed

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0014] The structure diagram of the present invention is as figure 1 As shown, it includes a target 1, two strain gauges 2, and a target rod holder 5, wherein the target 1 includes a target surface 1A and a target rod 1B, and the target rod 1B is fixed on the target rod holder 5, and the two strain gauges 2 Stick on the upper and lower sides of the target rod 1B respectively.

[0015] In order to make the speed measured by the sensor be the speed at the center of the target surface, the outer side of the above-mentioned target rod 1B is covered with a sleeve 3, the target surface 1A is exposed at the end of the sleeve 3, and the target surface 1A is exposed at the end of the sleeve. The area of ​​the end of the barrel 3 matches the measurement range and the rigidity of the target rod 1B. Since the outer surface of the target 1 is covered with the sleeve 3, it can be ensured that the impact force of the measured fluid only acts on the area of ​​the target surface exposed from ...

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Abstract

The disclosed sensor in use for measuring speed of fluid includes target, two pieces of strain gauge and fixing seat for target pole. The target includes target face and target pole fixed on the seat. Two pieces of strain gauge are pasted on upper and lower sides of the target pole. A sleeve is sheathed on outside the target pole; and the target face is exposed on end part of the sleeve. In time of detection, acting on rectangular target face, moving liquid makes target pole generate elastic deformation. Thus, original balanced electric bridge becomes unbalanced so as to output signal of voltage. The Target type sensor of liquid speed can carry out dynamic measurement for liquid speed in any conduit (full pipe, open trench), at any depth. Features are: sensitive response, economic and reliable, available to measuring liquid speed in steady or non ¿C steady flow field.

Description

1. Technical field: [0001] The invention is a target-type fluid velocity sensor for measuring fluid velocity, which belongs to the innovative technology of sensors used in the field of test and measurement. 2. Background technology: [0002] The measurement of fluid velocity at any point in the flow field is of great significance in engineering practice. Among them, the measurement of open channels and unsteady flow is more difficult, and accurate measurement is very difficult. Although the hot wire (film) method is simple and easy to implement, due to the influence of its heat capacity, the response time is long (the hot film method is above 4 seconds), so it cannot be used for the measurement of unsteady flow. Laser Doppler method Laser measurement can obtain the flow field distribution more accurately, but it is expensive and inconvenient to use. Others such as CCD method and ultrasonic method also have the same problem. [0003] Existing turbine flowmeters, target flo...

Claims

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Application Information

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IPC IPC(8): G01P5/08G01P5/00
Inventor 孙友松潘晓涛胡建国刘易凡章争荣
Owner GUANGDONG UNIV OF TECH
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