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Measuring device of oxide in metal tube based on bipolar magnetic probe

A measuring device and metal tube technology, applied in the direction of measuring devices, using electric devices, using electromagnetic means, etc., can solve the problems that monopolar magnetic probes are easily affected by magnetic saturation, the measurement results are not intuitive enough, and the measurement range is small. Achieve the effects of intuitive reading, rapid detection and easy observation

Inactive Publication Date: 2010-06-30
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Problems solved by technology

[0004] However, the above-mentioned measuring device has its disadvantages, that is, because the monopole magnetic probe is easily affected by the magnetic saturation phenomenon, it is easy to cause misjudgment
Moreover, displaying the measurement results in the form of a curve is not intuitive enough; in addition, the measurement range is small, only 0-75 degrees, which is greatly affected by the measurement position

Method used

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  • Measuring device of oxide in metal tube based on bipolar magnetic probe
  • Measuring device of oxide in metal tube based on bipolar magnetic probe
  • Measuring device of oxide in metal tube based on bipolar magnetic probe

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Embodiment Construction

[0015] From figure 1 and figure 2 It can be seen that the metal tube oxide measuring device based on the bipolar magnetic probe for measuring the bulk weight of the oxide in the austenitic stainless steel tube of the present invention includes a magnetic probe and a detection instrument connected by wires, and the magnetic probe It is a bipolar magnetic probe. Its structure is a plastic package casing 1 and a horseshoe-shaped permanent magnet 4 with N and S poles exposed from the casing. A magnetic induction coil 5 is wound on the horseshoe-shaped permanent magnet 4. The detection instrument converts the change of magnetic flux into electromotive force by using the law of electromagnetic induction To measure, adopt light-emitting diode display screen 6 to display readings.

[0016] During detection: clamp the N and S bipolars of the horseshoe-shaped permanent magnet 4 on the outer wall of the tested tube 3, and magnetize the oxide 2 in the tested tube 3 through the magnetic ...

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Abstract

The invention relates to a measuring device of oxide in a metal tube based on a bipolar magnetic probe and the measuring device is used to measure the stacking weight of oxide in an austenite stainless steel tube. The measuring device comprises a magnetic probe and a detecting instrument which are connected by a wire, wherein the magnetic probe is the bipolar magnetic probe and comprises a packaging shell and a U-shaped permanent magnet of which two poles are exposed out of the shell, a magnetic induction coil which is connected with the detecting instrument is wound on the U-shaped permanent magnet; and the detecting instrument is used to display read numbers by switching and adopting light-emitting diodes. The device adopts the bipolar magnetic probe and the magnetic induction coil to receive signals and is not easy to influence by the magnetic saturation phenomenon so that the detection is faster and more accurate; the probe has simple structure, small volume and flexible operation, the measurement range is up to 0-180 degrees; and the light-emitting diodes are used for display, and the read numbers are more intuitive and clearer and are easy to observe.

Description

technical field [0001] The invention relates to a magnetic non-destructive oxide detection device for measuring the accumulation weight of oxides in austenitic stainless steel pipes. Background technique [0002] Currently, known measuring devices for measuring oxides in austenitic stainless steel pipes generally include a unipolar magnetic probe, a magnetic field sensitive element and a detection instrument. The unipolar magnetic probe is in contact with the austenitic stainless steel tube, and the signal measured by the magnetic field sensitive element is transmitted to the display screen to display the characteristic simulation curve of oxide accumulation in the tube, and the accumulation height of oxide is obtained by calculation. [0003] Publication No. CN101122639A disclosed in the Chinese Patent Gazette is a Chinese invention patent application titled "Magnetic Non-destructive Measuring Device for Internal Oxide in Austenitic Stainless Steel Pipe", which includes a p...

Claims

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Application Information

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IPC IPC(8): G01B7/02
Inventor 窦洪林介东李鹏云
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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