Plasma jet velocity monitoring method and device

A plasma and jet velocity technology, applied in the field of plasma jet, can solve the problems of high construction cost of system equipment, complex plasma jet velocity measurement process, etc., to reduce construction cost, improve calculation accuracy and accurate confirmation. Effect
CN110677968AActive Publication Date: 2020-01-10INST OF MECHANICS - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF MECHANICS - CHINESE ACAD OF SCI
Publication Date
2020-01-10

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Abstract

The invention relates to a plasma jet velocity monitoring method and device. The method comprises the following steps: capturing a plurality of light patterns of laminar plasma, and determining the jet boundary of a plasma jet through the light-emitting boundary of the light patterns based on the positive correlation between the output power and the concentration of the plasma; determining the jetlength of the laminar plasma based on the axial jet boundary of the plasma jet from the jet outlet to the jet end; and calculating the average jet velocity of the plasma according to the jet length of the laminar plasma, and establishing a relation between the jet length of the laminar plasma and the arc current under the condition that different preset arc current jet velocities are kept unchanged. The method has the effects that the plasma jet velocity measurement process is simplified and the construction cost of the measurement system equipment is reduced.
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Description

technical field

[0001] The invention relates to the technical field of measuring plasma jets, in particular to a monitoring method and equipment for plasma jet velocity. Background technique

[0002] At present, plasma spraying is widely used in aerospace, navigation, machinery manufacturing, electronic parts manufacturing and other industrial fields for the formation of coatings for the production of various functional materials required for heat resistance, wear resistance, and corrosion resistance. For example, DC arc plasma is used Plasma spraying methods such as bulk spraying have been the key technology for material spray coating. In DC arc plasma applications, the process material is injected into the plasma laminar jet in the form of particulate powder or gas and is heated and accelerated. Therefore, real-time monitoring of the velocity of the plasma jet is an integral part of process control. Conventional plasma jet velocity measurement process is complex and the ...

Claims

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