An Acoustic System for Pipeline Profile Measurement

1983 ◽  
Vol 105 (4) ◽  
pp. 475-479
Author(s):  
H. Van Calcar
Keyword(s):  
Measurement Technique ◽  
Measurement System ◽  
Performance Enhancement ◽  
Three Dimensional ◽  
Profile Measurement ◽  
Baseline Measurement ◽  
Acoustic System ◽  
Position Measurement ◽  
Long Baseline ◽  
Hardware Configuration

This paper presents an acoustic position measurement system used for precise three-dimensional flowline profile measurement. The system measures several points along the flowline using the long-baseline measurement technique and augments this measurement with depth telemetry repeaters to maintain elevation accuracy throughout the changing installation geometry. The paper discusses both the measurement system and the performance enhancement features. The paper concludes with a discussion of the hardware configuration and the accuracy that can be expected when the technique is extended into deeper operating areas.

Instantaneous Measurement of 3D Profiles by Projecting Coded Grating

2005 ◽  
Vol 295-296 ◽  
pp. 495-500
Author(s):  
A.L. Tian ◽  
B. Li ◽  
M.T. Huang ◽  
Zhuang De Jiang
Keyword(s):  
Data Processing ◽  
Measurement System ◽  
Moving Objects ◽  
Three Dimensional ◽  
Profile Measurement ◽  
3D Measurement ◽  
Human Face ◽  
Measuring Range ◽  
Data Processing Software ◽  
Processing Software

A three-dimensional profile measurement system based on a projection coded grating technique is presented. The system uses a designing and decoding technique for grey coded gratings. The coded grating has black, white and grey stripes. The period triples a conventional grating. It greatly increases the height measuring range without any decrease in stripe separation. The shape of object can be obtained from only one grating image. The system is suitable for instantaneous measurement of moving objects including human face. The technique proposed permits rapid 3D measurement and no moving parts are involved in the system. The hardware is relatively simple. Special data processing software is developed. Results of a practical example confirm the effectiveness of the proposed method.

Dynamic Analysis of Head Movements by Means of a Three-Dimensional Position Measurement System

1990 ◽  
pp. 143-148
Author(s):  
Yoshimasa Watanabe ◽  
Hiroshi Ohtsuki ◽  
Hideki Okayama ◽  
Haruto Konishi ◽  
Yoshinobu Fujiwara ◽  
...  
Keyword(s):  
Dynamic Analysis ◽  
Measurement System ◽  
Three Dimensional ◽  
Head Movements ◽  
Position Measurement

Three Dimensional Measurement System for the Dynamic Deformation of Aero-engine Blade Profile

2020 ◽  
Vol 29 (07n08) ◽  
pp. 2040014
Author(s):  
Yongchao Wei ◽  
Chunyan Deng ◽  
Xingkun Wu ◽  
Liangzhong Ao
Keyword(s):  
Measurement System ◽  
High Speed ◽  
Technical Problem ◽  
Three Dimensional ◽  
Dynamic Measurement ◽  
Profile Measurement ◽  
Profile Information ◽  
Aero Engine ◽  
Phase Calibration ◽  
And Performance

In order to solve the technical problem of three-dimensional profile measurement of aero-engine blades with high speed rotation, an optical dynamic measurement system for aero-engine blades was developed. Firstly, the system is calibrated by the algorithm of spatial truncation phase calibration to establish the index between truncation phase and spatial coordinates. During the measurement, the deformation map of the rotating measured blade is obtained by synchronous projection and snapshot. By using the fast Fourier algorithm, the truncation phase is obtained, and then the profile information of blade can be obtained through the truncation phase and spatial coordinate index. Through the design and construction of the blade simulation platform and dynamic measurement experiment system, the three-dimensional profile data of the blade at different rotating speeds are obtained, compared and analyzed, and then the overall profile deformation law is discovered, which verifies the effectiveness and feasibility of the algorithm. The system can obtain the dynamic profile information of the whole blade completely, and provide innovative technical means for blade design verification and performance analysis.

Error compensation for three-dimensional profile measurement system

2015 ◽  
Vol 8 (4) ◽  
pp. 402-412 ◽  
Author(s):  
Xu Ye ◽  
Haobo Cheng ◽  
Zhichao Dong ◽  
Hon-Yuen Tam
Keyword(s):  
Measurement System ◽  
Error Compensation ◽  
Three Dimensional ◽  
Profile Measurement
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