An error compensation method of laser displacement sensor in the inclined surface measurement

2015 ◽  
Author(s):  
Feng Li ◽  
Zhongxing Xiong ◽  
Bin Li
Keyword(s):  
Error Compensation ◽  
Compensation Method ◽  
Displacement Sensor ◽  
Surface Measurement ◽  
Laser Displacement Sensor ◽  
Inclined Surface

Study on the symmetrical laser displacement sensor for the road surface measurement

2010 ◽  
Author(s):  
Hongxun Song ◽  
Ronggui Ma ◽  
Yi Zhang ◽  
Hui Ding ◽  
Ning Zhang
Keyword(s):  
Road Surface ◽  
Displacement Sensor ◽  
Surface Measurement ◽  
Laser Displacement Sensor ◽  
The Road

Research on high-precision laser displacement sensor-based error compensation model

2015 ◽  
Author(s):  
Zhifeng Zhang ◽  
Yusheng Zhai ◽  
Zhan Su ◽  
Lin Qiao ◽  
Yiming Tang ◽  
...  
Keyword(s):  
High Precision ◽  
Error Compensation ◽  
Displacement Sensor ◽  
Laser Displacement Sensor ◽  
Compensation Model

Development of On-Machine Measurement System Utilizing Line Laser Displacement Sensor

2011 ◽  
Vol 5 (5) ◽  
pp. 708-714 ◽  
Author(s):  
Go Abe ◽  
◽  
Masatoshi Aritoshi ◽  
Tomoki Tomita ◽  
Keiichi Shirase ◽  
...  
Keyword(s):  
Machine Tool ◽  
Precision Measurement ◽  
Error Compensation ◽  
Point Method ◽  
Displacement Sensor ◽  
Precision Machining ◽  
Laser Displacement Sensor ◽  
Cnc Machine ◽  
Machining Error ◽  
Measurement Device

Demand for precision machining of dies and molds with complex shapes has been increasing. Though high performance CNC machine tools are widely utilized for precision machining, machining error compensation is still necessary to meet accuracy requirements. For precision measurement, a workpiece must usually be unloaded from a CNC machine tool. Then, the workpiece is measured by a precision measurement device, such as 3D CMM. After the machining error is clarified according to the measurements taken, the workpiece must be re-clamped for the necessary error compensation machining. This error compensation machining is costly and time consuming, and it requires a highly skilled machinists. The re-clamping of the workpiece also causes positioning errors. Therefore, demands for on-machinemeasurement have been increasing. In this paper, an on-machine measurement device that consists of a line laser displacement sensor is developed. This measurement device, attached to the spindle head of a machine tool with magnetic clamps, has special features, such as noncontact, multi-point, high-speed measurement capabilities. Additionally, a sequential multi-point method, an extension of the two-point method, is applied for shape measurement accuracy.

Application of laser displacement sensor to free-form surface measurement

2015 ◽  
Vol 23 (7) ◽  
pp. 1939-1947 ◽  
Author(s):  
李兵 LI Bing ◽  
孙彬 SUN Bin ◽  
陈磊 CHEN Lei ◽  
魏翔 WEI Xiang
Keyword(s):  
Displacement Sensor ◽  
Surface Measurement ◽  
Free Form ◽  
Laser Displacement Sensor ◽  
Free Form Surface

Turning Dynamics: Part 1 — Experimental Analysis

2012 ◽  
Author(s):  
Eric B. Halfmann ◽  
C. Steve Suh ◽  
N. P. Hung
Keyword(s):  
Instantaneous Frequency ◽  
Period Doubling ◽  
Displacement Sensor ◽  
Laser Displacement Sensor ◽  
Turning Process ◽  
Time Frequency ◽  
Spectral Components ◽  
Tool Vibrations ◽  
Exact Moment ◽  
The Stability

The workpiece and tool vibrations in a lathe are experimentally studied to establish improved understanding of cutting dynamics that would support efforts in exceeding the current limits of the turning process. A Keyence laser displacement sensor is employed to monitor the workpiece and tool vibrations during chatter-free and chatter cutting. A procedure is developed that utilizes instantaneous frequency (IF) to identify the modes related to measurement noise and those innate of the cutting process. Instantaneous frequency is shown to thoroughly characterize the underlying turning dynamics and identify the exact moment in time when chatter fully developed. That IF provides the needed resolution for identifying the onset of chatter suggests that the stability of the process should be monitored in the time-frequency domain to effectively detect and characterize machining instability. It is determined that for the cutting tests performed chatters of the workpiece and tool are associated with the changing of the spectral components and more specifically period-doubling bifurcation. The analysis presented provides a view of the underlying dynamics of the lathe process which has not been experimentally observed before.

Vibration Test of Titanium Alloy Pipes

2012 ◽  
Vol 184-185 ◽  
pp. 701-706
Author(s):  
Ming Xing Qiu ◽  
Chuang Shao ◽  
Yong Zhou ◽  
Li Hua Yue
Keyword(s):  
Titanium Alloy ◽  
Failure Criteria ◽  
Fatigue Tests ◽  
Test Method ◽  
Displacement Sensor ◽  
Laser Displacement Sensor ◽  
New Findings ◽  
Vibration Fatigue ◽  
Welded Pipe ◽  
Test Result

In order to determine the fatigue limits of two kinds of titanium alloy pipes connected by welding and rolling, fatigue tests were carried out by the Aero-Criterion which gives vibration fatigue test method and failure criteria. A laser-displacement-sensor was used at the free end and a strain-gauge at the root of the pipe specimen. The test result shows that the fatigue limit of the welded pipe is higher than the rolled one. In the end some new findings are listed according to the test.

In-Process Visualisation for Deformation Monitoring and Analysis of Sheet Metal Forming Processes

2013 ◽  
Vol 677 ◽  
pp. 384-387 ◽  
Author(s):  
Wai Kei Ricky Kot ◽  
Luen Chow Chan
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Deep Drawing ◽  
Metal Forming ◽  
Deformation Process ◽  
Deformation Monitoring ◽  
Displacement Sensor ◽  
Laser Displacement Sensor ◽  
Profile Data ◽  
Profile Change

In this paper, a visualisation system will be discussed that can be used to capture the deformation profile of the sheet blank during sheet metal forming processes, such as deep drawing and shape forming. The visualisation system utilizes a 2D laser displacement sensor for deformation profile acquisition. The sensor is embedded in the die and the laser propagates through the die to detect the profile change of the specimen concealed in the die during operation. The captured profile data will be collected, manipulated and transferred to a monitor for display via a controller. This visualisation of the deformation profile will provide engineers and researchers with an intuitive means of analysing and diagnosing the deformation process during sheet metal forming.

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