scholarly journals Force Measuring System for High-Precision Surface Characterization under Extreme Conditions

10.5772/62386 ◽  
2016 ◽  
Author(s):  
Roman Nevshupa ◽  
Marcello Conte
Keyword(s):  
High Precision ◽  
Surface Characterization ◽  
Measuring System ◽  
Extreme Conditions

Research on the High Precision Laser Line Scanning Measuring System

2007 ◽  
Vol 339 ◽  
pp. 131-135 ◽  
Author(s):  
Jian Jun Ding ◽  
Zhuang De Jiang ◽  
Bing Li ◽  
Jun Jie Guo
Keyword(s):  
High Precision ◽  
Laser Scanning ◽  
Laser Line ◽  
Measuring System ◽  
Surface Measurement ◽  
Iteration Algorithm ◽  
Reconstruction Method ◽  
Loop Feedback ◽  
Axis Position ◽  
Line Scanning

Rapid reverse technology is one of the key technologies with which the enterprises develop new product and occupy the market rapidly. How to realize the reverse measurement and CAD geometry reconstruction rapidly and accurately is always the most important focus for the researchers. Based on the laser scanning technology, the realization principle of the laser line scanning measuring system is presented and the approaches to improve the precision are also analysed in the paper. The self-adaptation adjustment of the probe position can move the light knife image to the optimal imaging area of the CCD according to the calibration result, which will ensure the measurement precision of the CCD image. With the inner velocity loop and outer position loop feedback control, the simple axis position precision of the mechanical system can be controlled within 5um. In order to pick up the points of the light knife centre rationally and exactly, the reconstruction-disperse iteration algorithm is put forward. After processed by different iteration times, the optimal points can be obtained. The reconstruction method of curve and surface based on NURBS is also given. The paper presents the application and realization of the system at last, which realizes the curve and surface measurement with high precision.

Design of a Constant Probing Force System for Profilometer

2014 ◽  
Vol 511-512 ◽  
pp. 301-306
Author(s):  
Shou Bin Liu ◽  
Zhan Ping Li
Keyword(s):  
High Precision ◽  
Voice Coil Motor ◽  
Experimental Results ◽  
Measuring System ◽  
Core Component ◽  
Force System ◽  
The Core ◽  
Displacement Measurements

The core component of profilometer is a stylus displacement measuring system, whose resolution reaches nanoscale. Since the stylus tip is very small, a variation on probing force has a great impact on the results of high-precision displacement measurements. In this paper, a special flat rectangular voice coil motor is designed to realize a constant probing force for the stylus displacement measuring system. Experimental results show the probing force can be adjusted from 5mg to 1000mg and the resolution can reach 5mg.

Development of a noncontact liquid level measuring system using image processing

1998 ◽  
Vol 37 (12) ◽  
pp. 381-387 ◽  
Author(s):  
Yoichi Takagi ◽  
Akio Tsujikawa ◽  
Masao Takato ◽  
Takeshi Saito ◽  
Motoko Kaida
Keyword(s):  
Image Processing ◽  
High Precision ◽  
Inflection Point ◽  
Liquid Surface ◽  
Metal Strip ◽  
Liquid Level ◽  
Alcoholic Beverages ◽  
Measuring System ◽  
Single Image ◽  
Monitor Screen

This paper describes how the authors developed a liquid level measuring system designed to directly analyze images of liquid surfaces. This measuring system is based on the principle that the contour of the image of a slanted metal strip placed in a liquid shows an inflection point on the liquid interface. This liquid level measuring system using image processing is useful in automatically measuring the levels of water, oil, liquefied gases, and alcoholic beverages. Among the features of this measuring system are: (1) it is of the noncontact type, so that there is no need to install a sensor or other high-precision devices close to the liquid to be measured; (2) it can be installed in a way not affected by the liquid; (3) the scale and the liquid surface can be analyzed on an image basis directly, so that periodic recalibration is unnecessary; (4) deviations in measurements can be easily detected by visually checking the monitor screen; (5) images from more than one camera can be processed with a single image processor to reduce total costs.

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