Results 281 to 290 of about 153,389 (320)

Design and calibration of a three-dimensional localization system for automatic measurement of long and thin tube based on camera and laser displacement sensor

, 2019
An integrated system consisting of robot and laser scanner is considered as a promising alternative measurement device for three-dimensional tube which is long and thin.
Ruifeng Li, Jinlei Zhuang, Yunfeng Gao, Chuqing Cao, Ke Wang   +4 more
semanticscholar   +1 more source

High-dynamic angle measurement based on laser displacement sensors

Applied Optics, 2013
It is currently difficult to achieve good real-time dynamic angle measurements with high accuracy and large ranges. In this paper, a photoelectric measurement method for dynamic angles based on three laser displacement sensors (LDSs) is proposed. Offline, a dynamic angle vision measurement model is established, and the system is calibrated by using a ...
Junhua, Sun, Jie, Zhang, Zhen, Liu, Guangjun, Zhang   +3 more
openaire   +2 more sources

Lasers with optical feedback as displacement sensors

Optical Engineering, 1995
An interferometric displacement sensor with useful properties has been built based on a laser with optical feedback from light that is backscattered by a moving object. Information about the object's motion is encoded in the phase of the backscattered light, which in turn influences the phase and the amplitude of the laser via injection-locking physics.
openaire   +1 more source

Laser-speckle angular-displacement sensor: theoretical and experimental study

Applied Optics, 1998
A novel, to our knowledge, method for the measurement of angular displacement for arbitrarily shaped objects is presented in which the angular displacement is perpendicular to the optical axis. The method is based on Fourier-transforming the scattered field from a single laser beam that illuminates the target.
B, Rose, H, Imam, S G, Hanson, H T, Yura, R S, Hansen   +4 more
openaire   +2 more sources

Injection Locked Lasers as Surface Displacement Sensors

1995
In an age where engineered materials are becoming common place in the competitive world market, the manufacturer using engineered materials can not afford to waste material in the manufacturing process. The quality control techniques must become real time and on-line to reduce material waste and to reject unacceptable components before complex ...
Smith, J., Burger, C.
openaire   +2 more sources

Dual-polarization fiber grating laser displacement sensor

SPIE Proceedings, 2009
A high sensitivity displacement sensor based on a dual-polarization fiber grating laser incorporated with a cantilever beam is demonstrated. The cantilever beam transforms the displacement into a transverse force to the fiber grating laser which changes the fiber birefringence and therefore the polarization mode beat frequency of the laser.
Yang Zhang, Bai-Ou Guan
openaire   +1 more source

Bearing fault detection using laser displacement sensor

Proceedings of the 35th SICE Annual Conference. International Session Papers, 2005
This paper describes a vibration monitoring methodology for rolling element bearings based on using laser displacement sensor technology. This new method not only has feature of discontiguous measurement, but also installs laser sensor easily. It can overcome the defects that installation of accelerometer sensor is very diffculty as to old machinery or
null Yimin Shao, F. Nezu
openaire   +1 more source

Optimizing laser triangulation displacement sensor of 3D positioning and posture using COA Based BPNN

, 2020
The purpose of this paper is to propose cuckoo optimization algorithm (COA)-based back propagation neural network (BPNN) to reduce the effect of the nonlinearities presented in laser triangulation displacement sensors.
Yassine Selami, Na Lv, W. Tao, Hongwei Yang, Hui Zhao   +4 more
semanticscholar   +1 more source

Study on precision optimization method for laser displacement sensors

AOPC 2017: 3D Measurement Technology for Intelligent Manufacturing, 2017
As the development of the measuring technology, laser displacement sensors become the most commonly used ones in the field of dimensional metrology as a result of their versatility and mature technology. However, as the differences of environment conditions and the variation of measured surfaces, the measuring errors of the laser displacement sensor ...
Jianguo Fang, Liping Wang, Longxiang Bao, Bi Chao   +3 more
openaire   +1 more source

A Laser Polarimetric Sensor for Measuring Angular Displacements of Objects

Proceedings of European Meeting on Lasers and Electro-Optics CLEOE-96, 1996
One of the promising applications of laser autocollimating polarimetric sensors is measuring angular displacements of objects. For this purpose a parallel-sided plate, cut out of a birefringent crystal, and a retroreflector are mounted onto the object.
Yu. M. Klimkov, M.I. Shribak, A.P. Shkadarevich   +2 more
openaire   +2 more sources