An automatic alignment technique for multiple rangefinders

2008 ◽  
Author(s):  
Kenta Fujiwara ◽  
Koichiro Yamauchi ◽  
Yukio Sato
Keyword(s):  
Automatic Alignment ◽  
Alignment Technique

Automatic alignment technique for suspended coil in Joule balance

Metrologia ◽  
2021 ◽  
Author(s):  
Yang Bai ◽  
Dawei Wang ◽  
Zhengkun Li ◽  
Yunfeng Lu ◽  
Pengcheng Hu ◽  
...  
Keyword(s):  
Automatic Alignment ◽  
Alignment Technique

Automatic Alignment Technique For X-Ray Lithography Using Moire Signals In Reflection

1986 ◽  
Author(s):  
Yoshiyuki Uchida ◽  
Masato Furukawa ◽  
Kazuhiro Hane ◽  
Shuzo Hattori
Keyword(s):  
X Ray ◽  
Automatic Alignment ◽  
Alignment Technique

Automatic Alignment Technique For Cryogenically Cooled Interferometers

1983 ◽  
Author(s):  
Ralph H. Haycock ◽  
Brent Bartschi ◽  
Hoa Nguyen
Keyword(s):  
Automatic Alignment ◽  
Alignment Technique

Computer-Controlled Hrem Alignment Using Automated Diffractogram Analysis

1990 ◽  
Vol 48 (1) ◽  
pp. 532-533
Author(s):  
G.Y. Fan ◽  
O.L. Krivanek
Keyword(s):  
Electron Microscope ◽  
High Resolution ◽  
The Other ◽  
Full Information ◽  
Resolution Electron ◽  
Skilled Operator ◽  
Automatic Alignment ◽  
High Resolution Electron Microscope ◽  
Computer Controlled ◽  
Recorded Image

Full alignment of a high resolution electron microscope (HREM) requires five parameters to be optimized: the illumination angle (beam tilt) x and y, defocus, and astigmatism magnitude and orientation. Because neither voltage nor current centering lead to the correct illumination angle, all the adjustments must be done on the basis of observing contrast changes in a recorded image. The full alignment can be carried out by a computer which is connected to a suitable image pick-up device and is able to control the microscope, sometimes with greater precision and speed than even a skilled operator can achieve. Two approaches to computer-controlled (automatic) alignment have been investigated. The first is based on measuring the dependence of the overall contrast in the image of a thin amorphous specimen on the relevant parameters, the other on measuring the image shift. Here we report on our progress in developing a new method, which makes use of the full information contained in a computed diffractogram.

scholarly journals Convolutional neural network as a tool for automatic alignment of electron optical beam shaping devices

2021 ◽  
Vol 27 (S1) ◽  
pp. 822-824
Author(s):  
Enzo Rotunno ◽  
Amir Tavabi ◽  
Paolo Rosi ◽  
Stefano Frabboni ◽  
Peter Tiemeijer ◽  
...  
Keyword(s):  
Neural Network ◽  
Convolutional Neural Network ◽  
Beam Shaping ◽  
Optical Beam ◽  
Automatic Alignment

Optimising the Transfer Alignment of Weapon INS

2003 ◽  
Vol 56 (2) ◽  
pp. 323-335 ◽  
Author(s):  
Paul D. Groves
Keyword(s):  
Inertial Sensor ◽  
Integrated Navigation ◽  
Velocity Measurements ◽  
Transfer Alignment ◽  
Navigation Solution ◽  
Alignment Technique ◽  
Alignment Process ◽  
Using Data ◽  
Design Options ◽  
Better Than

Transfer alignment is the process of initialising and calibrating a weapon INS using data from the host aircraft's navigation system. To determine which transfer alignment technique performs best, different design options have been assessed, supported by simulation work. The dependence of transfer alignment performance on environmental factors, such as manoeuvres, alignment duration, lever arm and inertial sensor quality has also been studied. ‘Rapid’ alignment, using attitude as well as velocity measurements was found to perform better than ‘conventional’ techniques using only velocity. Innovative developments include the estimation of additional acceleration and gyro states and estimation of force dependent relative orientation, which has enabled robust alignment using wing rock manoeuvres, which do not require the pilot to change trajectory. Transfer alignment has been verified in real-time by flight trials on a Tornado aircraft. In addition, techniques have been developed to prevent transients in the aircraft integrated navigation solution following GPS re-acquisition after an outage of several minutes from disrupting the transfer alignment process.

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