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External multi-point inductive flow sensor

A flow sensor and multi-point sensing technology, which is applied in the field of flow sensors, can solve the problems of poor versatility and large noise mixed in the output signal, and achieve the effect of simple structure, large range and high measurement sensitivity

Inactive Publication Date: 2008-10-08
杭州术通高端仪器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides an external multi-point inductive flow sensor with simple and reasonable structure, good versatility and high measurement sensitivity; it solves the technical problems in the prior art that the output signal is mixed with a large amount of noise and the versatility is not good

Method used

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  • External multi-point inductive flow sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] as attached figure 1 , 2 , 3 and 4, an external multi-point induction flow sensor includes a structural body 7 and two pairs of detection units 6 arranged on the bottom of the structural body 7, the structural body 7 is placed in the pipeline 11 wall of the sensor, Two pressure guiding holes 12 are provided on the wall of the pipeline 11, through which the detection unit 6 senses the alternating stress of the vortex generator, and the structural body 7 is placed in the wall of the sensor pipeline 11, making the sensor more versatile. The bottom surface 13 of the structural body 7 is provided with a partition 10 arranged along the fluid flow direction X, that is, along the axial direction of the pipeline 11. A pair of detection units 6 are symmetrically distributed on both sides of the partition 10. The detection unit 6 It is cylindrical, and the height of the partition 10 is the same as the diameter of the detection unit 6 . The detection unit 6 includes a housing 9, ...

Embodiment 2

[0031] as attached Figure 5 As shown, an external multi-point induction flow sensor includes a structural body 7, the bottom surface 13 of the structural body 7 is provided with a partition 10, and two pairs of detection units 6 are respectively welded in the horizontal direction on both sides of the partition 10, and the two pairs of detection units The units 6 are arranged in a row along the axial direction of the pipeline 11. There is a gap between two adjacent detection units 6. The length of the partition is greater than the total length of the four detection units, and the height of the partition is the same as the diameter of the detection unit. All the other are the same with embodiment 1.

Embodiment 3

[0033] Such as Figure 6 As shown, an external multi-point induction flow sensor includes a structural body 7, the bottom surface 13 of the structural body 7 is provided with a partition 10, and two pairs of detection units 6 are respectively welded in the vertical direction on both sides of the partition 10. The detection units 6 are arranged along the radial direction of the pipeline 11 , the length of the partition is slightly greater than the total length of the two detection units 6 , and the height of the partition is greater than twice the diameter of the detection unit 6 . All the other are the same with embodiment 1.

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Abstract

A flow rate transducer of external multipoint induction type is prepared as setting a numbers of detection units at bottom surface of structure body, setting two detection unit at the same level in parallel along direction of fluid flowing to be a pair, setting elastic membrance (EM) end of through-hole on the same pair of detection unit to be opposite, setting through-hole direction on detection unit to be as the same direction with direction of fluid-flowing, setting piezoelectric ceramic plate (PCP) with electrode plate being connected to lead wire at one side of EM, arranging gap between wall of through-hole and PCP and lacking insulation plate in said gap.

Description

technical field [0001] The invention relates to a flow sensor, in particular to an external linkage induction flow sensor which uses a differential principle to measure the alternating pressure of a vortex street. Background technique [0002] The vortex flow sensor is a new type of flow measuring instrument developed in the 1970s. They detect the fluid vibration frequency signal proportional to the volume flow rate through flow sensors with thermal, strain, capacitance, and ultrasonic detection methods. For vortex flow sensors, the anti-vibration performance is an important indicator to measure the industrial application of a vortex flowmeter. Vibration in industry is ubiquitous, such as speed pulsation and fluid oscillation in fluid turbulence, and random factors such as industrial pipeline vibration, valve opening and closing, and valve core vibration, which will cause great noise to the detected frequency signal interference. At present, the more advanced vortex flow s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F1/32
Inventor 区宇辉宋开臣张圣宾
Owner 杭州术通高端仪器有限公司
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