Non-Contact Optical Length Measurement System for Industrial Applications

1980 ◽  
Vol 13 (7) ◽  
pp. 583-588
Author(s):  
M. Rioux ◽  
J. Domcy
Keyword(s):  
Measurement System ◽  
Industrial Applications ◽  
Length Measurement ◽  
Optical Length

Investigation of particulate systems using optical pathlength spectroscopy

2000 ◽  
Vol 627 ◽  
Author(s):  
Gabriel Popescu ◽  
Aristide Dogariu
Keyword(s):  
Path Length ◽  
Random Media ◽  
Michelson Interferometer ◽  
Industrial Process ◽  
Optical Path Length ◽  
Industrial Applications ◽  
Optical Path ◽  
Interference Signal ◽  
Optical Length ◽  
Reference Mirror

ABSTRACTIn many industrial applications involving granular media, knowledge about the structural transformations suffered during the industrial process is desirable. Optical techniques are noninvasive, fast, and versatile tools for monitoring such transformations. We have recently introduced optical path-length spectroscopy as a new technique for random media investigation. The principle of the method is to use a partially coherent source in a Michelson interferometer, where the fields from a reference mirror and the sample are combined to obtain an interference signal. When the system under investigation is a multiple-scattering medium, by tuning the optical length of the reference arm, the optical path-length probability density of light backscattered from the sample is obtained. This distribution carries information about the structural details of the medium. In the present paper, we apply the technique of optical path-length spectroscopy to investigate inhomogeneous distributions of particulate dielectrics such as ceramics and powders. The experiments are performed on suspensions of systems with different solid loads, as well as on powders and suspensions of particles with different sizes. We show that the methodology is highly sensitive to changes in volume concentration and particle size and, therefore, it can be successfully used for real-time monitoring. In addition, the technique is fiber optic-based and has all the advantages associated with the inherent versatility.

scholarly journals An automated length measurement system for tilapia fish based on image processing technique

2021 ◽  
Vol 1088 (1) ◽  
pp. 012049
Author(s):  
Nor Salwa Damanhuri ◽  
Mohammad Faiz Mohammad Zamri ◽  
Nor Azlan Othman ◽  
Sarah Addyani Shamsuddin ◽  
Belinda Chong Chiew Meng ◽  
...  
Keyword(s):  
Image Processing ◽  
Measurement System ◽  
Processing Technique ◽  
Length Measurement ◽  
Image Processing Technique

Highly sensitive optical length measurement by using a microwave photonic filter with multi-passband

2019 ◽  
Vol 66 (13) ◽  
pp. 1450-1456
Author(s):  
Jianghai Wo ◽  
Jin Zhang ◽  
Tao Wang ◽  
Pengfei Du ◽  
Anle Wang ◽  
...  
Keyword(s):  
Length Measurement ◽  
Optical Length ◽  
Microwave Photonic ◽  
Highly Sensitive

scholarly journals Sub-Nanometer Length Measurement System Using a fs-comb

2011 ◽  
Vol 39 (11) ◽  
pp. 842-846
Author(s):  
Mariko KAJIMA ◽  
Kaoru MINOSHIMA
Keyword(s):  
Measurement System ◽  
Length Measurement

Development of Mass and Length Measurement System on Conveyor Belt

2006 ◽  
Author(s):  
Akihiro Watanabe ◽  
Takanori Yamazaki ◽  
Hideo Ohnishi ◽  
Masaaki Kobayashi ◽  
Shigeru Kurosu
Keyword(s):  
Measurement System ◽  
Conveyor Belt ◽  
Length Measurement

Performance of a Continuously Traversing 2-Camera Non-Contact Optical Strain Sensor for In-Plant Assessment of Prestressed Concrete Railroad Crosstie Transfer Length

2016 ◽  
Author(s):  
B. Terry Beck ◽  
Aaron A. Robertson ◽  
Robert J. Peterman ◽  
Chih-Hang John Wu
Keyword(s):  
Measurement System ◽  
Prestressed Concrete ◽  
Strain Measurement ◽  
Production Quality ◽  
Step Change ◽  
Surface Strain ◽  
Length Measurement ◽  
Transfer Length ◽  
Measurement Systems ◽  
New System

Accurate knowledge of transfer length has been shown to be crucial to the goal of maintaining continuous production quality in the modern manufacture of prestressed concrete railroad ties. Traditional manual laboratory methods, such as the conventional Whittemore method which requires the use of embedded reference points, are clearly not suitable for production operation or for use in reliable production quality-control. This paper presents the results of another advance in the development of automated transfer length measurement systems for practical in-plant operation. The new device offers a significant improvement over the previously successful automated Laser-Speckle Imaging (LSI) system developed by the authors. The earlier automated LSI strain measurement system has been modified to provide significantly improved optical resolution of longitudinal surface strain, with the ability to resolve longitudinal prestressed concrete crosstie surface strain without time-consuming special surface preparation. More importantly, the new system is also capable of making measurements of strain in a real-time “on-the-fly” manner over the entire distance range of interest on the tie associated with transfer length development. It features both a “jog” mode of operation, similar to its predecessor in which measurements of longitudinal surface strain are automatically captured in arbitrary spatial increments over the entire range of the computer-controlled traverse, and an “on-the-fly” mode in which measurements of longitudinal surface strain are captured without the need for stopping at each measurement location. This latter mode offers the potential of a much faster capture of the strain profile and should prove to be very beneficial for field testing and in-plant diagnostic applications. The performance of this new system is first demonstrated using a new calibrated step-wise uniform strain field setup which has been developed specifically for verification of this and other automated transfer length measurement systems. This verification system produces a calibrated step change in surface deflection, effectively subjecting the automated strain measurement system to an ideal step change in longitudinal strain for a given gauge length. In addition, the new automated system is demonstrated by conducting measurements of longitudinal surface strain on prestressed concrete crossties in a manufacturing plant. For this latter experimental in-plant testing, strain measurements using the new system are also compared directly with those from the recently introduced 6-camera transfer length measurement system, as well as with the traditional Whittemore gauge measurements. The agreement between these independent measurement systems is remarkable, and it is shown to even be possible to discern differences in strain profile and associated transfer length between adjacent crossties within a given casting bed. This new automated and high-resolution device should provide a very convenient and fast diagnostic tool for the manufacturer to quickly identify the need to modify production (e.g., concrete mix) if transfer length specifications fall out of desired range.

scholarly journals Development of a Low-Cost Vibration Measurement System for Industrial Applications

Machines ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 12 ◽  
Author(s):  
Adrian Villarroel ◽  
Grover Zurita ◽  
Romeo Velarde
Keyword(s):  
Data Storage ◽  
Measurement System ◽  
Low Cost ◽  
Industrial Applications ◽  
Vibration Measurement ◽  
Signal Frequency ◽  
Research Approach ◽  
Validation Process ◽  
Vibration Measurements ◽  
New Guidelines

Vibration-Based Condition Monitoring (VBCM) provides essential data to perform Condition-Based Maintenance for efficient, optimal, reliable, and safe industrial machinery operation. However, equipment required to perform VBCM is often relatively expensive. In this paper, a low-cost vibration measurement system based on a microcontroller platform is presented. The FRDM K64F development board was selected as the most suitable for fulfilling the system requirements. The industrial environment is highly contaminated by noise (electromagnetic, combustion, airborne, sound borne, and mechanical noise). Developing a proper antialiasing filter to reduce industrial noise is a real challenge. In order to validate the developed system, evaluations of frequency response and phase noise were carried out. Additionally, vibration measurements were recorded in the industry under different running conditions and machine configurations. Data were collected simultaneously using a standard reference system and the low-cost vibration measurement system. Results were processed using Fast Fourier Transform and Welch’s method. Finally, a low-cost vibration measurement system was successfully created. The validation process demonstrates the robustness, reliability, and accuracy of this research approach. Results confirm a correlation between signal frequency spectrum obtained using both measurement systems. We also introduce new guidelines for practical data storage, communications, and validation process for vibration measurements.

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