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本文利用声电匹配和聚焦声透镜技术,研制出1.15MHz高灵敏度,高分辨率空气超声传感器,设计了单片机信号采集,处理,控制软硬件系统和纠偏执行机构,首次实现扫描式,固定式超声传感器二维自动跟踪,跟踪精神模纵向均达到了0.5mm。 相似文献
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介绍了电压比较法的工作原理,并在此基础上提出了一种新的电弧传感焊缝横向位置偏差提取算法。利用该算法可提取出较为准确、可靠的横向位置偏差量。 相似文献
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埋弧焊图像法焊缝自动跟踪传感系统 总被引:6,自引:0,他引:6
结合采用埋弧焊进行容器类焊接结构制造过程中的工艺特点及工况,设计了一种将微型半导体激光发生器、微型摄像机及具有滤光功能的光学系统三者集成一体的焊缝视觉传感器。该传感器结构简洁、紧凑、使用方便灵活,图像采集与处理系统具有处理速度高(100ms)、实时性强,界面显示直观、简洁、工艺可示性等特点。 相似文献
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建立了弧焊机器人视觉传感焊缝跟踪系统,重点研究了跟踪路径提取算法和焊缝跟踪的实现策略。采用传感器引导机器人运动的控制方式,为克服前视距离的影响,提取的焊缝跟踪点信息在跟踪过程中不是立刻被使用的,而是存储在循环队列结构中,要等到焊枪到达该点附近时才能用到。计算出的机器人驱动向量使焊枪向焊缝的中心点方向调整,并按照给定的步长运动,使其始终沿焊缝方向向前运动,实现沿焊缝的自主跟踪。结果表明,通过对焊枪位置及绕焊枪旋转角度的调节,实现了S形曲线焊缝的实际跟踪,跟踪过程平稳、精确。 相似文献
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用声发射传感器的焊缝跟踪控制研究 总被引:6,自引:3,他引:6
基于缝隙对声发射波传播有影响的现象,作者研制成一种利用声发射-微处理器控制的焊缝跟踪系统。本文叙述了缝隙对声发射波传播的影响和焊缝跟踪控制装置的设计。试验表明这种焊缝跟踪控制装置是灵敏的,它能克服偏差,正确跟踪直焊缝和曲线焊缝。 相似文献
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无辅助光源图像法TIG焊焊缝跟踪传感系统 总被引:6,自引:1,他引:6
焊接过程中焊炬自动跟踪焊缝对保证焊接质量 ,提高自动化程度有着极其重要的实际意义。焊缝自动跟踪技术的关键是焊缝位置的传感方法 ,本文在深入研究TIG焊电弧发光行为的基础上 ,结合实际的焊接工况 ,建立了一套利用电弧弧光检测焊缝位置的图像传感系统。该系统在硬件方面解决了图像采集与焊接电流的同步以及图像品质的提高等问题 ,在计算机软件方面解决了阈值与图像品质相匹配以及焊缝位置的提取等问题。生产实际应用结果表明 ,该系统在检测精度、处理速度、稳定性、可靠性及实际工况的适应性等方面完全满足高质量焊缝对焊接过程自动对中的要求。 相似文献
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用于电弧焊接的跟踪传感器(上) 总被引:1,自引:0,他引:1
本文系统地、全面地论述了用于电弧焊接跟踪的机械、电磁感应、光学、CCD视觉、超声、电弧传感器的原理、应用及其发展。为电弧焊的自动跟踪技术提供参考。 相似文献
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Tandem gas metal arc welding (T-GMAW) process shows a high deposition rate that up to three times of the single electrode GMAW,so the welding speed could be significantly increased in this process.However,the majority of this process applications are based on the pre-programmed robotic welding,which does not allow them to track the seam real-time during welding.Rotating arc sensor,sensing the seam position by detecting the changing of welding currents,has been widely adopted in the automatic robot welding process.It is proposed in this paper to integrate the rotating arc sensor with a trailing torch to develop a new approach of rotating arc lead tandem gas metal arc welding (RLT-GMAW) process.The characteristics of the welding currents in the proposed new welding process were firstly studied,and then a self-turning fuzzy control seam tracking strategy was developed for the mobile robot automatic welding.The experimental results showed that the proposed RLT-GMAW process had an excellent seam tracking performance and high welding deposition rate.Even if there were some electromagnetic interactions between the two arcs,the deviation of the welding seam could also be reflected by the fluctuation of the welding currents on the leading arc once the correct welding parameters were selected.Based on the detected deviation,the welding tracking experiments showed that the proposed self-turning fuzzy controller had a good performance for the RLT-GMA W process seam tracking. 相似文献
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The electron beam is an excellent welding tool.During years this powerful beam guarantees high performance welds in automotive,aviation and other industries.Due to its excellent parallel seam quality this welding tool is often used for well-prepared gapless joints.Powerful fixtures have to guarantee the well-defined positioning of the work piece.However,tolerances in the work piece or the loading mechanism can cause misalignments.High quality welds frequently do not allow those misalignments.Consequently operators have to take care that the beam is proper positioned before welding.With joint tracking systems it is possible to automate those manual manipulations.The production gets more independent on adjustments by the operator.CCD cameras or electrodes for backscattered electrons for joint tracking systems need directly access to the joint.In many applications the fixture is in between the work piece and the measuring device.The joint cannot be automatically detected.Furthermore the positioning of the electrodes for backscattered electrons gives a major impact to the quality of the measurement.It becomes mandatory to integrate the joint detection into the fixture.The usage of backscattered electrons for seam tracking requests the integration of electrodes into the fixture.The fast beam deflection for electron beams opens a wide range of opportunities.Electron optical viewing improves the visualization of the work piece.Multi pool applications or surface modifications can increase the production capacity or achieve better product performance.Joint tracking can be performed offline or online.The free programmable environment allows combining tasks to match the production demands.Examples will be used to illustrate individual applications. 相似文献
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通过对现有电弧传感器的扫描信号进行深入研究,提出了一种摆动旋转电弧传感器,在分析其信号特点的基础上,推导出焊枪空间姿态与弧长变化之间的数学关系,建立了该电弧传感器的弧长数学模型.考虑到焊接电弧信号的特点与复杂性,采用了Gabor小波滤波器来消除信号中的噪声干扰,并对滤波后的采样数据进行了特征向量提取,降低了数据的维度,根据欧式距离的原理设计了焊枪姿态分类器,采用模型参数的最速下降法对焊枪的空间姿态进行了实时识别.结果表明,摆动旋转电弧传感器的焊枪空间姿态识别算法简单、获取信息量大,为提高焊缝跟踪的精度提供了理论依据. 相似文献