Molten pool temperature field detection method for removing influence of electric arc light
A detection method and temperature field technology, applied in radiation pyrometry, optical radiation measurement, measuring devices, etc., can solve the problems of low precision, inability to remove the influence of arc light, and affect the detection accuracy of molten pool temperature field, etc., to achieve the elimination of The effect of the influence of the arc light
Inactive Publication Date: 2018-08-14
NANJING UNIV OF SCI & TECH
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Problems solved by technology
During the welding manufacturing process, the existence of arc light will seriously affect the detection accuracy of the molten pool temperature field
The existing radiation thermometers can only measure the point temperature of the molten pool, and cannot remove the influence of arc light, so the accuracy is not high
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[0013] combine figure 1 , a kind of melting pool temperature field detection method that removes arc light influence of the present invention adopts full-field molten pool temperature field detection system, and this system comprises spectroscope, two optical filters, two CCD cameras and computer; Spectroscope It is used to divide the incident light into two identical outputs, the filter is used to select the light of a specific band to pass through, the CCD camera is used to image the molten pool under the selected specific band, and the computer is used to process the image output by the CCD camera. The temperature field of the molten pool is calculated; there are two filters, and the band of the filter is selected to avoid the spectral line band emitted by the welding wire composition and the shielding gas during the welding process; the CCD cameras are two identical black and white CCDs camera. The detection method specifically includes the following steps:
[0014] Step...
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The invention discloses a molten pool temperature field detection method for removing the influence of electric arc light. The method includes that firstly, a set of full-view-field molten pool temperature field detection system is designed based on a colorimetric temperature measurement method, and a calculation formula of the molten pool temperature field is deduced; and then the influence of the electric arc light on the detection of the molten pool temperature field is analyzed; and finally, the molten pool temperature field detection method for removing the influence of the electric arc light is provided. According to the method, the influence of the electric arc light can be removed, and the high-precision molten pool temperature field distribution condition can be obtained, and themethod has important significance for further improving the welding quality.
Description
technical field [0001] The invention relates to a method for detecting the temperature field of a molten pool, in particular to a method for detecting the temperature field of a molten pool that removes the influence of arc light. Background technique [0002] In the welding manufacturing process, there are strong physical processes of energy, momentum and mass transfer in the molten pool, resulting in physical phenomena such as heat transfer, convection and mass transfer. The temperature field distribution of the molten pool directly affects the external quality of welding manufacturing. Therefore, the theoretical and experimental research on the temperature field of the molten pool has direct guiding significance for the development of remanufacturing technologies such as welding processing. [0003] In recent years, non-contact radiation temperature measurement has been developed rapidly. Radiation temperature measurement technology mainly uses the radiance information ...
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Inventor 柏连发陆骏余荣伟赵壮韩静张毅
Owner NANJING UNIV OF SCI & TECH