scholarly journals Calibration method of a laser beam based on discrete point interpolation for 3D precision measurement

2020 ◽  
Vol 28 (19) ◽  
pp. 27588
Author(s):  
Jiehu Kang ◽  
Bin Wu ◽  
Zefeng Sun ◽  
Jiang Wang
Keyword(s):  
Laser Beam ◽  
Precision Measurement ◽  
Calibration Method ◽  
Discrete Point ◽  
Point Interpolation

scholarly journals A Normal Sensor Calibration Method Based on an Extended Kalman Filter for Robotic Drilling

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3485 ◽  
Author(s):  
Dongdong Chen ◽  
Peijiang Yuan ◽  
Tianmiao Wang ◽  
Ying Cai ◽  
Haiyang Tang
Keyword(s):  
Kalman Filter ◽  
Laser Beam ◽  
Extended Kalman Filter ◽  
Zero Point ◽  
Calibration Method ◽  
Sensor Calibration ◽  
Beam Direction ◽  
Displacement Sensors ◽  
Robotic Drilling ◽  
Drilling System

To enhance the perpendicularity accuracy in the robotic drilling system, a normal sensor calibration method is proposed to identify the errors of the zero point and laser beam direction of laser displacement sensors simultaneously. The procedure of normal adjustment of the robotic drilling system is introduced firstly. Next the measurement model of the zero point and laser beam direction on a datum plane is constructed based on the principle of the distance measurement for laser displacement sensors. An extended Kalman filter algorithm is used to identify the sensor errors. Then the surface normal measurement and attitude adjustments are presented to ensure that the axis of the drill bit coincides with the normal at drilling point. Finally, simulations are conducted to study the performance of the proposed calibration method and experiments are carried out on a robotic drilling system. The simulation and experimental results show that the perpendicularity of the hole is within 0.2°. They also demonstrate that the proposed calibration method has high accuracy of parameter identification and lays a basis for high-precision perpendicularity accuracy of drilling in the robotic drilling system.

Automatic Calibration Method and System of Laser Beam Orientation Based on Deflection and Translation of Optical Paths

2016 ◽  
Vol 36 (7) ◽  
pp. 0722003
Author(s):  
陈志峰 Chen Zhifeng ◽  
黎达宇 Li Dayu ◽  
吴卓麒 Wu Zhuoqi ◽  
钟永贤 Zhong Yongxian ◽  
谢龙豪 Xie Longhao ◽  
...  
Keyword(s):  
Laser Beam ◽  
Calibration Method ◽  
Automatic Calibration ◽  
Beam Orientation ◽  
Optical Paths

A new flexible laser beam profiler for the inspection of train wheels

2020 ◽  
pp. 095440972092200
Author(s):  
M Torabi ◽  
SM Mousavi G ◽  
D Younesian
Keyword(s):  
Laser Beam ◽  
Point Cloud ◽  
Three Dimensional ◽  
Point Clouds ◽  
Calibration Method ◽  
The Other ◽  
Geometrical Parameters ◽  
Prototype System ◽  
Perpendicular Plane ◽  
Wheel Profile

In this paper, a flexible laser beam profiler is proposed to easily measure the profile of a train wheel for railway inspection. It only requires two laser beams (together and in parallel) to obtain two three-dimensional point-clouds based on the laser triangulation principle. Either the laser beam profiler or the wheel can be freely moved. The motion need not be known. The wheel profile will be obtained in two steps. First, the wheel axis position and orientation are obtained by minimizing the distance between one of the point-clouds and the other translated point-cloud, and translation is defined as a rotation of any point on the point-cloud around the wheel axis until it lies on the other point-cloud's laser plane. In the second step, the wheel profile is extracted by selecting one of the point-clouds and rotating it about the wheel axis and by finding the intersection of rotating points and a perpendicular plane, the perpendicular plane is defined as any arbitrary plane which passes through the wheel axis. This method is useful particularly for obtaining geometrical parameters of a wheel such as flange height, flange slope and flange thickness. In order to commission the proposed method, a prototype system was designed and manufactured. The performance of the system, evaluated in different circumstances, shows a measurement error of up to 2%. Compared with classical methods utilizing a caliper or those which use expensive equipment or additional parts such as reference guides, the proposed method is easy to use and flexible. Also, a novel calibration method is utilized to calibrate the system accurately and freely.

A Robot Calibration Method Based on Virtual Closed Kinematic Chain

2010 ◽  
Vol 139-141 ◽  
pp. 2162-2167
Author(s):  
Tian Qin Wang ◽  
Chang Liu ◽  
Zhen Pu Zhang ◽  
Da Cheng Wang
Keyword(s):  
Genetic Algorithm ◽  
Laser Beam ◽  
Kinematic Chain ◽  
Calibration Method ◽  
Kinematic Parameters ◽  
Robot Calibration ◽  
Straight Line ◽  
Simulating Analysis ◽  
The Absolute ◽  
Calibration Approach

This paper offers a robot calibration approach based on the virtual closed kinematic chain so that the absolute location accuracy of a robot can be improved. The calibration approach suggests that laser beam can be mounted on the robot’s end so as to form a virtual closed kinematic chain in the interest of enlarging the pose errors to proper extent, in this way straight line equations in space can be acquired when the robot positions are changed continuously, in the end the robots’ kinematic parameters can be figured out by genetic algorithm while measurement can be totally avoided in the calibration. Calibrating practices, simulating analysis and experiments on robots show that the approach can improve the absolute calibrating accuracy effectively.

Calibration Method for Spatial Pose of Laser Beam with High-Accuracy

2019 ◽  
Vol 39 (8) ◽  
pp. 0812002
Author(s):  
段晓登 Duan Xiaodeng ◽  
吴斌 Wu Bin ◽  
康杰虎 Kang Jiehu
Keyword(s):  
Laser Beam ◽  
Calibration Method ◽  
High Accuracy

Analysis of the Influence Factors on High Precision Measurement of Laser Beam Parameter Based on Camera

2018 ◽  
Vol 55 (7) ◽  
pp. 071401
Author(s):  
肖青 Xiao Qing ◽  
刘侠 Liu Xia ◽  
邓剑钦 Deng Jianqin ◽  
姚建铨 Yao Jianquan ◽  
张大鹏 Zhang Dapeng ◽  
...  
Keyword(s):  
Laser Beam ◽  
High Precision ◽  
Precision Measurement ◽  
Influence Factors ◽  
Beam Parameter ◽  
High Precision Measurement

A calibration method for spatial pose of a laser beam

2019 ◽  
Vol 30 (11) ◽  
pp. 115010 ◽  
Author(s):  
Bin Wu ◽  
Xiaodeng Duan ◽  
Jiehu Kang
Keyword(s):  
Laser Beam ◽  
Calibration Method

Quantitative Infrared Spectroscopy of Interstitial Oxygen in Silicon Wafers Using Multivariate Calibration

1993 ◽  
Vol 47 (12) ◽  
pp. 2102-2107 ◽  
Author(s):  
J. H. Linn ◽  
K. L. Hanley
Keyword(s):  
Infrared Spectroscopy ◽  
Precision Measurement ◽  
Multivariate Calibration ◽  
Calibration Method ◽  
Silicon Wafers ◽  
Interstitial Oxygen ◽  
Measurement Capability ◽  
Wide Range ◽  
Single Calibration

A PLS multivariate calibration method is used to create a reliable means for the determination of the interstitial oxygen content in silicon wafers. The multivariate calibration, derived from silicon standards with various backside treatments, provides similar precision measurement capability when compared to peak area calibration curves established from individual backside treatments. In this case, the significant advantage of the multivariate calibration is that a single calibration can yield interstitial oxygen results that correlate favorably with vendor values over a wide range (20 to 40 ppma), regardless of the backside condition of the wafers.

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