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激光板厚测量系统中,需要动态调节系统中传感器的位置,以适应被测板材表面位置的变化。采用步进电机驱动的差动微位移机构动态地调节系统中传感器位置,实现保证板厚测量有效性和扩展系统的测量范围的目的。应用表明,差动微位移机构能够方便地实现传感器位置的控制,系统的位置调节精度达到0.0025mm。 相似文献
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胡晓东 《组合机床与自动化加工技术》2012,(12)
为实现对螺纹量规大径、小径、中径、螺距、牙型角(牙型半角)等螺纹参数的快速检测,全面反应螺纹实际情况,并提高检测质量、减少检测成本,设计了一种基于激光三角法的螺纹量规非接触式自动检测系统的检测方法.着重研究了该系统基于激光三角检测原理的非接触式检测螺纹量规各参数的设计思路、工作原理和实现方法等内容.设计了由三坐标测量机为位移模块、数控转台为旋转模块、激光位移传感器为检测模块以及控制装置数控处理、控制、评价模块等组成的检测系统,并给出了螺纹主要参数的算法以及数据采集、处理等手段.研制了相应的专用检测软件,进行了相应的实验研究.实验结果表明,该系统能全面反应出螺纹量规实际情况,测试精度高、检测成本低、工作效率高. 相似文献
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介绍一种零件表面粗糙度的激光在线测量系统,该系统基于激光三角测量系统,用无衍射激光光束作光源,用高精度的CCD摄像机作位移传感器,通过计算机进行数据处理得到表面粗糙度值。以车削表面为例,用触针法测得的表面粗糙度值和用该系统测得的表面粗糙度值相近,说明实现表面粗糙度在线检测是可能的,该测量方法具有测量速度快和能够显示被测表面的具体形貌等优点。 相似文献
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为了提高时栅转台控制系统的位置检测精度,提出了一种以卡尔曼滤波和PI控制融合的控制方法,并在此基础上设计了高精度伺服控制系统。该方法利用卡尔曼滤波预测实现PI控制器的参数预测自适应整定,控制系统以则采用以电流环作为内环、位置环为外环的双闭环控制结构和时栅传感器为转台位移反馈部件,同时,以ARM(LPC2124)为控制核心,结合电源电路、SP3232串口通信等硬件电路实现卡尔曼滤波和PI控制相融合的控制方法。经实验测试,设计的时栅转台伺服系统具有运动稳定可靠性,位置检测精度在-0.8″~1.2″范围内, 满足高精度时栅转台控制系统的精度要求。 相似文献
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建立了MH00005-E00机器人的D-H坐标系及运动学模型,在Matlab环境下编写了机器人逆运动学方程求解代码,并对提取的涡轮叶片特征点进行了特定算法的数据处理,实现了机器人末端装载的激光位移传感器始终与叶片型面垂直且数据的坐标姿态在激光位移传感器指定的测量范围内。编写了机器人能够识别的JOB文件代码,在Moto Sim EG环境下搭建了涡轮叶片检测平台,通过导入JOB文件,实现了涡轮叶片的检测,并分析了检测结果。 相似文献
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提出了一种用时序驱动光敏元构成匀速扫描坐标系的方法,实现了将被测物体空间位移的测量转换为对时间差的测量。根据时栅相对运动双坐标系的转换原理,将线阵CCD的光敏元视为匀速扫描坐标系,两个空间上并排,时序上互相错开的线阵CCD为静止坐标系,则同一被测对象在两个CCD上输出电信号的时间差的变化量与扫描速度的乘积,即为所测位移的大小,并可以判断位移的方向。用雷尼绍激光干涉仪对所研制的CCD时栅传感器进行校准,在有效测量范围(600.05 mm)内,经过修正后的测量误差控制在±2 μm以内,实现了在光学领域应用时间测量空间的思想。 相似文献
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Seokbae Son Hyunpung Park Kwan H. Lee 《International Journal of Machine Tools and Manufacture》2002,42(8)
Recently, laser scanners have been used more often for inspection and reverse engineering in industry, such as for motors, electronic products, dies and molds. However, due to the lack of efficient scanning software, laser scanners are usually manually operated. Therefore, the tasks that involve inspection and reverse engineering processes are very expensive. In this research, we propose an automated measuring system for parts having a freeform surface. In order to automate a measuring process, appropriate hardware system as well as software modules are required. The hardware system consists of a laser scanning device and setup fixtures that can provide proper location and orientation for the part to be measured. The software modules generate optimal scan plans so that the scanning operation can be performed accordingly. In the scan planning step, various scanning parameters are considered in the generation of optimal scan paths, such as the view angle, depth of field, the length of the stripe, and occlusion. In the scanning step, the generated scan plans are downloaded to the industrial laser scanner and the point data are captured automatically. The measured point data sets are registered automatically and the quality of point data is evaluated by checking the difference between the CAD model and the measured data. To demonstrate an automated measuring system, a motorized rotary table with two degrees of freedom and a CNC-type laser scanner with four degrees of freedom are used. 相似文献
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Geometric and quasi-static thermal error compensation for a laser digitizer equipped coordinate measuring machine 总被引:7,自引:0,他引:7
An emerging trend in dimensional inspection of manufactured parts is the use of coordinate measuring machines (CMMs) equipped with non-contact laser digitizers instead of traditional contact probes. Error mapping is generally proprietary to the CMM controller, and the accuracy of such a combined system is limited by the lack of integrated CMM/laser digitizer error compensation. This paper reports progress towards achieving such a system.Geometric error compensation measurements are made on a test machine at 20, 25 and 30 °C. Performance of the system was tested by measuring a special optically coated sphere ballbar artifact. The scan coordinates, the CMM axis scale positions and temperature were recorded simultaneously in real time. The CMM error compensation data was then used to post process the laser digitizer coordinates to obtain improved global part coordinates.Inclusion of the error compensation terms is shown to reduce the dispersion of results by 65 to 80%. 相似文献
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《CIRP Annals》1987,36(1):395-398
A laser interferometric system for measuring arbitrary angles has been developed. The system comprises a two-stage precise rotary table, an adjustable optical polygon, a laser interferometer for measuring constant angles, a frequency optically six-multiplied differential laser Interferometer for measuring small angles, and a CCD-microcomputer-based interferometric signal processing system. The Interference phenomena occuring in the cases of different constant angles with differently oriented incident beams, the method of angle tracking and the method of determining the equivalent parameters of the laser interferometer for measuring small angles are discussed in this paper.Experiments show that this system gives an accuracy better than 0.3 arcseconds in measuring arbitrary angles ranging from 0 to 360 degrees. High accuracy, self-calibration ability, new measuring principles, convenience in use, and low cost are the distinguishing features of this system. 相似文献
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为实现对导轨型面的快速自动化测量,研究一种基于激光三角位移传感器测距的检测方法,提出离散性测量滚动直线导轨副导轨型面精度的测量方法。该方法通过激光三角位移传感器扫描直线导轨各个截面轮廓,设计相应算法对截面轮廓数据进行处理,并分析补偿测量过程中产生的误差,计算导轨截面轮廓滚道的圆心坐标和半径,以此取得直线导轨滚道半径、滚道中心轴线间的距离及滚道中心轴线相对导轨基准面的平行度。最后设计了标准圆棒的测量试验和直线导轨横截面测量试验,对比分析测量结果,验证直线导轨型面精度检测方案的可行性和稳定性。 相似文献
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Radial error measuring device based on auto-collimation for miniature ultra-high-speed spindles 总被引:1,自引:0,他引:1
Kengo Fujimaki Kimiyuki Mitsui 《International Journal of Machine Tools and Manufacture》2007,47(11):1677-1685
This study has developed a radial error measuring device for miniature ultra-high-speed spindles because it is very difficult to measure the radial error motion of miniature ultra-high-speed spindles by the conventional measurement method using capacitive-type displacement sensors. The authors have proposed an optical measurement method based on auto-collimation, which evaluates the radial error motion according to the movements of a laser beam reflected from a target sphere attached to the spindle end. This optical measurement method is suitable for radial error measurements of miniature ultra-high-speed spindles because of its applicability to a small target sphere, high-speed response and minor susceptibility to electric noise. In this paper, the measurement principle, and basic characteristics of the optical measurement method in addition to an approximate analysis are shown. The radial error motion of a miniature ultra-high-speed spindle with a steel ball 1 mm in diameter are measured by an optical measuring device designed and manufactured to implement the proposed method. The measurement results show that the optical measuring device is able to measure the radial error motion of ultra-high-speed spindles with a maximum rotational speed of 200 krpm. 相似文献
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用CCD图像传感器测量杨氏弹性模量的研究 总被引:1,自引:0,他引:1
对传统的镜尺法测量杨氏弹性模量进行了改进,用高灵敏度电荷耦合器件(CCD)图像传感器取代传统的依靠人眼从望远镜读数获取激光位移数据,实现了过程自动化,消除了测量过程中人为因素的影响。试验测得杨氏弹性模量的相对误差仅为0.88%,大大提高了测量精度。 相似文献
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采用高功率横流CO2激光器,以铁基和镍基合金粉末为熔覆材料,用同步送粉法在灰铸铁基体材料上进行激光熔覆试验,并对熔覆层组织和性能进行比较分析。结果表明,激光熔覆镍基时覆层内的组织较铁基合金熔覆层组织均匀细致;熔覆镍基和铁基粉末合金层与基体结合紧密成冶金结合;结合区的组织晶粒细小,合金碳化物含量高,其硬度也最高。用正交试验法分析激光功率、扫描速度、熔覆层数对熔覆效果、表面硬度的影响规律,获得激光熔覆层表面硬度显著提高;对表面硬度影响最大的因素是扫描速度,其次是激光功率,熔覆层数则影响不大。熔覆Fe35合金粉末综合优化参数为扫描速度300mm/min、激光功率4.0kW、熔覆二层。熔覆Ni20A合金粉末优化参数为扫描速度400mm/min、激光功率4.0kW。 相似文献