Micro-differential pressure measuring device for detecting airflow of pipeline

A technology for detecting pipes and measuring devices, applied in the field of detection, can solve the problems of high cost, poor repeatability, unstable airflow in exhaust pipes, etc., and achieve the effects of simple structure, high measurement accuracy and sensitivity

Inactive Publication Date: 2015-05-20
SHAANXI JOIN CREATE SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The air flow in the exhaust pipe of chemical experiments is unstable, and it is often necessary to detect the micro-differential pressure in it. The differential pressure sensor currently used is relatively expensive and has poor repeatability.

Method used

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  • Micro-differential pressure measuring device for detecting airflow of pipeline

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Embodiment Construction

[0010] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0011] Such as figure 1 As shown, a differential pressure measurement device for detecting pipeline airflow includes a U-shaped tube 1 loaded with a magnetic liquid 2, one end of the U-shaped tube 1 is wound with a first inner coil 11, and the first inner coil 11 is wound outside The first outer coil 12 coaxial with it, the other end of the U-shaped pipe 1 is wound with a second inner coil 21, the second inner coil 21 is wound with a second outer coil 22 coaxial with it, the first inner coil 11 and the second inner coil 11 The two inner coils 21 are connected in series to the AC input end, and the first outer coil 12 and the second outer coil 22 are reversely connected in series to serve as data output ends.

[0012] Principle of the present invention is:

[0013] Assuming that the turns of the first inner coil 11 and the second inner coil 21 ...

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Abstract

The invention discloses a micro-differential pressure measuring device for detecting airflow of a pipeline, which comprises a U-shaped pipe carrying magnetic liquid. One end of the U-shaped pipe is wound with a first inner coil; the first inner coil is externally wound with a coaxial and equilong first outer coil; the other end of the U-shaped pipe is wound with a second inner coil; the second inner coil is externally wound with a coaxial and equilong second outer coil; the first inner coil and the second inner coil are serially connected with an AC input end; and the first outer coil and the second outer coil are in series-opposing connection and then serve as a data output end. Micro-differential pressure measurement in the pipeline can be realized by using a simple structure, the measurement precision and sensitivity are high, and the device can be used repeatedly for a long time.

Description

[0001] technical field [0002] The invention belongs to the technical field of detection, in particular to a micro-differential pressure measuring device for detecting pipeline airflow. Background technique [0003] The airflow in the exhaust pipe of chemical experiments is unstable, and it is often necessary to detect the micro-differential pressure in it. The differential pressure sensor currently used is relatively expensive and has poor repeatability. Contents of the invention [0004] In order to overcome the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a micro-differential pressure measuring device for detecting pipeline airflow, which uses magnetic liquid to generate an induced magnetic field, and performs measurement according to the change of coil mutual inductance when the liquid flows. [0005] In order to achieve the above object, the technical scheme adopted in the present invention is: [0006] A different...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L13/04
Inventor 不公告发明人
Owner SHAANXI JOIN CREATE SCI & TECH
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