The results of the simulation show that the shape of the weld pool is typically oval.
计算结果表明：钛合金电子束焊接时，熔池呈典型的卵形分布。
Based on these fuzzy control forms, weld pool width is easily controlled by adjusting welding current.
以焊接电流为控制量，可以根据此控制作用表对焊缝熔宽进行实时控制。
The foundation of the future research of weld pool image processing and weld bead control was established.
为进一步进行熔池图像处理和焊缝成型控制的研究奠定了基础。
The passive visual sensing method was successfully applied to detect the image of weld pool in CO2 welding.
应用被动式视觉传感方法进行CO2焊焊接熔池的形状检测。
A mathematical model has been established for fluid flow and heat transfer in weld pool with a deformed surface.
建立了熔池表面存在变形的流场与热场的数学模型。
A fast algorithm of image processing was designed for extracting the shape parameters of the weld pool in real time.
设计了快速图像处理算法，满足在实际焊接过程中提取熔池形状参数的要求。
An approach is proposed that this deviation can be obtained by using the weld pool image centroid and a Kalman filter.
为此提出一种利用熔池图像质心和卡尔曼滤波来间接获取电弧与焊缝偏差的方法。
An image detect system with near infrared CCD for monitoring the copper weld pool on the surface of steel was established.
建立了一个近红外CCD熔池动态信息的图像检测系统，用于钢表面铜熔池视觉信息的检测。
A three-dimensional numerical analysis model of fluid flow and heat transfer in pulsed current TIG weld pool is developed.
对运动电弧作用下脉冲tIG焊接熔池流场与热场动态变化过程建立了三维数学模型。
By analysis of the establishing process of the keyhole weld pool, the regularities of the welding parameters are obtained.
通过穿孔过程分解研究，揭示出焊接工艺参数在小孔稳定建立过程中的影响规律。
Finally, the fluid flow of the weld pool was taken into account by increasing the heat conduction coefficient at elevated temperature.
最后采用增大热传导系数的方法，考虑了熔池内流体流动对整个温度场的影响。
A 3-d transient numerical model for TIG welding stainless steel has been developed to simulate full-penetrated weld pool dynamic behavior.
利用建立的三维tIG焊接熔池瞬时行为数值分析模型，对移动热源作用下不锈钢薄板全熔透时熔池动态行为进行了数值分析。
This paper studied the effects of weld pool surface deformation on welding arc behavior characters basing on unified arc pool mathematical model.
在电弧与熔池统一模型的基础上研究熔池上表面变形对电弧行为特征的影响。
The calculated results of current density and heat flux on flat weld pool surface using model established in this paper are agreed with experiment.
用本模型计算出的平坦熔池表面电流密度和热流密度的分布与试验结果显示了很好的一致性。
An image detect system with near infrared CCD (charge coupled devices) for monitoring the copper weld pool on the surface of steel was established.
建立了一个近红外CCD熔池动态信息的图像检测系统，用于钢表面铜熔池视觉信息的检测。
TIG welding experiments show that the predictions of the model have a good agreement with the experimental observation with respect to weld pool shape.
焊接工艺试验表明，根据该模型计算的焊缝成形与试验测试结果吻合程度良好。
This paper has simulated the driving force of solidification crack of stainless steels, namely the, stress strain field in the trail of molten weld pool.
对不锈钢凝固裂纹的驱动力即熔池尾部应变场进行了模拟。
And the effect of SPreading fusion of active flux on weld pool depth and arc phenomenon in A-TIG welding is also studied with properly experimental method.
采取适当的试验方法研究A-TIG焊活性剂对电弧现象及活性剂涂敷量对焊接熔深增加的作用。
The investigation of the relationships between weld pool shape parameters and welding process parameters may be beneficial to the quality control of CO2 welding.
在大量工艺实验的基础上，本文进一步研究了熔地形状参数与焊接规范参数之间的关系，从而为CO_2焊接质量控制奠定了基础。
This article illuminates the nitrogen behavior in the welding arc zone and weld pool respectively so as to control the content of solid solution nitrogen effectively.
对熔焊时电弧区、熔池区的氮行为进行了分析，以实现焊缝固溶氮含量的有效控制。
Passive visual sensing method is the major method for sensing welding process, the principle of which is to capture weld pool image by the illumination of electric arc.
被动式视觉传感方法是焊接过程传感的一种主要方法，其主要原理是利用电弧光照射熔池表面获得熔池图像。
The surface tension, arc blow force and electromagnetic force work positive to improve the penetration, and the buoyancy can increase the width in the middle of weld pool.
表面张力、电弧吹力和电磁搅拌力均有利于获得较大的熔深，浮力有利于增加焊缝中间部位的宽度。
The calculating formulas of top and bottom pool-surface deformation in TIG full-penetration weld pool is developed based on principles of fluid mechanics and variation calculus.
根据流体力学理论和变分法原理，推导出了熔透情况下TIG焊接熔池上表面和下表面变形的方程。
The result of weld pool detecting indicated that the disturbance from arc could be effectively reduced by the composite filter system, and the high quality of images were received.
图像检测实验结果表明，该复合滤光系统有效地消除了弧光干扰，获得了高质量的熔池图像。
With the captured images of the weld pool, the shape parameters of the weld pool can be calculated using image processing algorithm, for fulfill the requirement of real time control.
利用获得的焊接熔池图像，采用一定的熔池图像处理算法可以计算出熔池形状的特征参数，以满足过程建模和实时控制的要求。
The qualitative analysis is carried out on the behavior of the partial penetrated weld pool with welding current changing from pulsed peak value to base value during pulsed TIG welding.
对脉冲TIG焊未熔透型熔池在脉冲峰-基转换期间熔池三维形态变化行为进行了定性的分析，并从力和能量角度建立了未熔透熔池液面形态的数学模型。
The qualitative analysis is carried out on the behavior of the partial penetrated weld pool with welding current changing from pulsed peak value to base value during pulsed TIG welding.
对脉冲TIG焊未熔透型熔池在脉冲峰-基转换期间熔池三维形态变化行为进行了定性的分析，并从力和能量角度建立了未熔透熔池液面形态的数学模型。
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