Peak movement detection method of an equally spaced fringe for precise position measurement

2002 ◽  
Vol 41 (2) ◽  
pp. 428 ◽  
Author(s):  
Jong Hoon Yi
Keyword(s):  
Detection Method ◽  
Movement Detection ◽  
Position Measurement ◽  
Precise Position

3D calibration for micro-manipulation with precise position measurement

2001 ◽  
Vol 1 (2) ◽  
pp. 117-130 ◽  
Author(s):  
Akiko Kawaji ◽  
Toshio Fukuda ◽  
Fumihito Arai
Keyword(s):  
Position Measurement ◽  
Precise Position

A Precise Position Measurement System of Roll-to-Roll Printing Using Burst Alignment Patterns

2018 ◽  
Author(s):  
Taehyeong Kim ◽  
Dongho Oh ◽  
Youngjin Kim ◽  
Jihyeon Kim ◽  
Byeongcheol Lee
Keyword(s):  
Measurement System ◽  
High Speed ◽  
Printed Electronics ◽  
High Volume ◽  
Measurement Range ◽  
Generation Process ◽  
Position Measurement ◽  
Process Technology ◽  
Precise Position ◽  
Roll To Roll

Printed electronics is a next-generation process technology that is suitable for high speed and high volume production and can make electronic devices and circuits on flexible materials. To commercialize printed electronics, it is necessary to improve the alignment precision of printing. In order to improve the alignment precision of the roll-to-roll process, accurate measurement of the web position is required. Therefore, in the previous research of this paper, we proposed a measurement system of the moving direction and the lateral movement using an encoder. However, in the previous study, the direction of error control had to be set according to the measurement position of the encoder, and the measurement range was so narrow. In this paper, we propose a measurement system that can detect the direction of error and increase the effective measurement range using the burst alignment pattern that generates the burst signal. Applying it to roll-to-roll printing position measurement systems, measurements can be performed with greatly improved efficiency and measurement range.

scholarly journals Efficient Movement Compensation and Detection Algorithm using Blob Detection and Modified Kalman Filter

2020 ◽  
Vol 9 (5) ◽  
pp. 1187-1193
Keyword(s):  
Kalman Filter ◽  
Video Sequence ◽  
Detection Method ◽  
Detection Algorithm ◽  
Movement Detection ◽  
Blob Detection ◽  
Modified Kalman Filter ◽  
Filtering Technique ◽  
Movement Compensation ◽  
Time Required

In various real time applications such as security and surveillance etc., detection of movement from video sequence is commonly used. In such applications, time required to detect the movement and its accuracy is very crucial. In this paper, an efficient motion compensation and detection algorithm using Blob detection and modified Kalman filter techniques is proposed. The method is mainly based on Kalman filtering technique which is modified to compensate and detect the unwanted movement caused by the camera. Also the shadow effect caused by the variation in the intensity of light and object is removed using thresholding technique. Accuracy of movement detection is improved by implementing the blob detection method. The experimental results obtained from the developed algorithm is compared with few methods existing in the literature for validation.

A precise position measurement system of roll-to-roll printing using burst alignment patterns

2019 ◽  
Vol 26 (1) ◽  
pp. 231-238
Author(s):  
Taehyeong Kim ◽  
Youngjin Kim ◽  
Jihyeon Kim ◽  
Byeongcheol Lee ◽  
Jimin Park ◽  
...  
Keyword(s):  
Measurement System ◽  
Position Measurement ◽  
Precise Position ◽  
Roll To Roll

Nonlinear eye movement detection method for drowsiness studies

1996 ◽  
Vol 43 (3) ◽  
pp. 227-242 ◽  
Author(s):  
Alpo Värri ◽  
Kari Hirvonen ◽  
Veikko Häkkinen ◽  
Joel Hasan ◽  
Pekka Loula
Keyword(s):  
Eye Movement ◽  
Detection Method ◽  
Movement Detection

Research on Precision Construction Measurement of Curved Surface Steel Structure Project

2011 ◽  
Vol 94-96 ◽  
pp. 1363-1368
Author(s):  
Deng Jie Wang ◽  
Guang Yue Wang
Keyword(s):  
Linear Equation ◽  
Steel Structure ◽  
Curved Surface ◽  
Measurement Technology ◽  
Construction Control ◽  
Construction Process ◽  
Position Measurement ◽  
Precise Position ◽  
Elevation Measurement

The positioning measurement of spatial curved surface steel structure project is a key link in construction process. How to measure position fast and precisely is an important problem concerned by steel structure project field. Taking actual project as an example, this article studied precision construction measurement technology in curved surface steel structure project, put forward resemble-leveling method elevation measurement, and naturalization lofting method which is based on spatial linear equation. This article has important guiding significance to precise position measurement of curved surface steel structure project and to construction control.

scholarly journals A 24 GHz Waveguide based Radar System using an Advanced Algorithm for I/Q Offset Cancelation

2017 ◽  
Vol 15 ◽  
pp. 249-258 ◽  
Author(s):  
Christoph Will ◽  
Sarah Linz ◽  
Sebastian Mann ◽  
Fabian Lurz ◽  
Stefan Lindner ◽  
...  
Keyword(s):  
Phase Shifter ◽  
Industrial Applications ◽  
Radar System ◽  
Guided Wave ◽  
Position Measurement ◽  
Intelligent Algorithm ◽  
Precise Position ◽  
Analog To Digital ◽  
Baseband Signal ◽  
Scale Range

Abstract. Precise position measurement with micrometer accuracy plays an important role in modern industrial applications. Herewith, a guided wave Six-Port interferometric radar system is presented. Due to limited matching and discontinuities in the radio frequency part of the system, the designers have to deal with DC offsets. The offset voltages in the baseband lead to worse relative modulation dynamics relating to the full scale range of the analog-to-digital converters and thus, considerably degrade the system performance. While common cancelation techniques try to estimate and extinguish the DC offsets directly, the proposed radar system is satisfied with equalizing both DC offsets for each of the two differential baseband signal pairs. Since the complex representation of the baseband signals is utilized for a subsequent arctangent demodulation, the proposed offset equalization implicates a centering of the in-phase and quadrature (I/Q) components of the received signal, which is sufficient to simplify the demodulation and improve the phase accuracy. Therefore, a standard Six-Port radar system is extended and a variable phase shifter plus variable attenuators are inserted at different positions. An intelligent algorithm adjusts these configurable components to achieve optimal I/Q offset cancelation.

scholarly journals Multifunctional Ground Control Points with a Wireless Network for Communication with a UAV

Sensors ◽  
2019 ◽  
Vol 19 (13) ◽  
pp. 2852 ◽  
Author(s):  
Xiongzhe Han ◽  
J. Thomasson ◽  
Yang Xiang ◽  
Hussein Gharakhani ◽  
Pappu Yadav ◽  
...  
Keyword(s):  
Wireless Network ◽  
Strong Relationship ◽  
Ground Control ◽  
Average Height ◽  
Control Points ◽  
Radiometric Calibration ◽  
Position Measurement ◽  
Precise Position ◽  
Ground Control Points ◽  
Average Reflectance

Ground control points (GCPs) are commonly used for georeferencing in remote sensing. Precise position measurement of the GCPs typically requires careful ground surveying, which is time-consuming and labor-intensive and thus excessively costly if it needs to be repeated multiple times in a season. A system of multifunctional GCPs and a wireless network for communication with an unmanned aerial vehicle (UAV) was developed to improve the speed of GCP setup and provide GCP data collection in real-time during the flight. While testing the system, a single-board computer on a fixed-wing UAV used in the study successfully recorded position data from all the GCPs during the flight. The multifunctional GCPs were also tested for use as references for calibration of reflectance and height for field objects like crops. The test of radiometric calibration resulted in an average reflectance error of 2.0% and a strong relationship (R2 = 0.99) between UAV-based estimates and ground reflectance. Furthermore, the average height difference between UAV-based height estimates and ground measurements was within 10 cm.

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