Automated Surface Profiling of Drywall Surface for Sanding

2011 ◽  
Author(s):  
Dony Cherian Alex ◽  
Saeed Behzadipour ◽  
Mohamed Al-Hussein
Keyword(s):  
Surface Profiling

Experiments with a scanning tunneling microscope (STM) mounted in a scanning electron microscope (SEM)

1986 ◽  
Vol 44 ◽  
pp. 636-639
Author(s):  
Oliver C. Wells ◽  
Mark E. Welland
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Mechanical Stability ◽  
Tunneling Current ◽  
Feedback System ◽  
Scanning Tunneling ◽  
Surface Profiling ◽  
Close Proximity ◽  
Metal Tip ◽  
Scanning Electron

Scanning tunneling microscopes (STM) exist in two versions. In both of these, a pointed metal tip is scanned in close proximity to the specimen surface by means of three piezos. The distance of the tip from the sample is controlled by a feedback system to give a constant tunneling current between the tip and the sample. In the low-end STM, the system has a mechanical stability and a noise level to give a vertical resolution of between 0.1 nm and 1.0 nm. The atomic resolution STM can show individual atoms on the surface of the specimen.A low-end STM has been put into the specimen chamber of a scanning electron microscope (SEM). The first objective was to investigate technological problems such as surface profiling. The second objective was for exploratory studies. This second objective has already been achieved by showing that the STM can be used to study trapping sites in SiO2.

scholarly journals Flexible and Transparent Polymer-Based Optical Humidity Sensor

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3674
Author(s):  
Katerina Lazarova ◽  
Silvia Bozhilova ◽  
Sijka Ivanova ◽  
Darinka Christova ◽  
Tsvetanka Babeva
Keyword(s):  
Humidity Sensor ◽  
Amphiphilic Copolymer ◽  
Poly Vinyl Alcohol ◽  
Optical Monitoring ◽  
Optical Contrast ◽  
Successful Development ◽  
Flexible Sensor ◽  
Surface Profiling ◽  
Humidity Range ◽  
Different Levels

Thin spin-coated polymer films of amphiphilic copolymer obtained by partial acetalization of poly (vinyl alcohol) are used as humidity-sensitive media. They are deposited on polymer substrate (PET) in order to obtain a flexible humidity sensor. Pre-metallization of substrate is implemented for increasing the optical contrast of the sensor, thus improving the sensitivity. The morphology of the sensors is studied by surface profiling, while the transparency of the sensor is controlled by transmittance measurements. The sensing behavior is evaluated through monitoring of transmittance values at different levels of relative humidity gradually changing in the range 5–95% and the influence of up to 1000 bending deformations is estimated by determining the hysteresis and sensitivity of the flexible sensor after each set of deformations. The successful development of a flexible sensor for optical monitoring of humidity in a wide humidity range is demonstrated and discussed.

Properties of Al Films Depend on Substrate Temperature by DC Magnetron Sputter Deposition

2013 ◽  
Vol 662 ◽  
pp. 413-416
Author(s):  
Yi Shen ◽  
Ruo He Yao
Keyword(s):  
Grain Size ◽  
Film Thickness ◽  
Substrate Temperature ◽  
Sheet Resistance ◽  
Cross Section ◽  
Sputter Deposition ◽  
Surface Profiling ◽  
Magnetron Sputter Deposition ◽  
Magnetron Sputter ◽  
Substrate Temperatures

Al films were prepared by DC magnetron sputter deposition at different substrate temperatures. The sheet resistance of the films was measured by four point probe sheet resistance meter, and the film thickness, which was obtained by surface profiling system. The surface and cross-section morphology of the films was observed by AFM and FESEM. As a result, the resistivity of the films decreases obviously as the substrate temperature increases gradually. The higher substrate temperature is, the rougher the films surface is and the larger the grain size is.

Principles of Computer Numerical Control Applied to Small Research Animal Surgical Procedures

2018 ◽  
Author(s):  
Matthew Rynes ◽  
Leila Ghanbari ◽  
Jay Jia Hu ◽  
Daniel Sousa Schulman ◽  
Gregory Johnson ◽  
...  
Keyword(s):  
Numerical Control ◽  
Cnc Milling ◽  
Surface Profiling ◽  
Cnc Milling Machine ◽  
Milling Operations ◽  
Tissue Removal ◽  
Removal Processes ◽  
Cranial Implants ◽  
Tools And Techniques

The tools and techniques available for systems neuroscientists for neural recording and stimulation during behavior have become plentiful in the last decade. The tools for implementing these techniques in vivo, however, have not advanced respectively. The use of these techniques requires the removal of sections of skull tissue without damaging the underlying tissue, which is a very delicate procedure requiring significant training. Automating a part of the tissue removal processes would potentially enable more precise procedures to be performed, and it could democratize these procedres for widespread adoption by neuroscience lab groups. Here, we describe the ‘Craniobot’, a microsurgery platform that combines automated skull surface profiling with a computer numerical controlled (CNC) milling machine to perform a variety of microsurgical procedures in mice. Surface profiling by the Craniobot has micrometer precision, and the surface profiling information can be used to perform milling operations with relatively quick, allowing high throughput. We have used the Craniobot to perform skull thinning, small to large craniotomies, as well as drilling pilot holes for anchoring cranial implants. The Craniobot is implemented using open source and customizable machining practices and can be built with of the shelf parts for under $1000.

Displacement measurement and surface profiling using semi-insulating photoconductive semiconductors and linearly frequency-ramped lasers

1999 ◽  
Vol 75 (10) ◽  
pp. 1374-1376 ◽  
Author(s):  
Feng Jin ◽  
Jacob B. Khurgin ◽  
Suhdir Trivedi ◽  
Chen-Chia Wang ◽  
Esam Gad
Keyword(s):  
Displacement Measurement ◽  
Surface Profiling

Heat Transfer Between Liquid Film Formed on the Inclined Dimpled Surface and Ambient Air

2011 ◽  
Author(s):  
Vitalii Dubrovskii ◽  
Aleksei Podvysotskii ◽  
Aleksandr Shraiber ◽  
Yaroslav Chudnovsky ◽  
Aleksandr Kozlov
Keyword(s):  
Heat Transfer ◽  
Liquid Film ◽  
Ambient Air ◽  
Engineering Practice ◽  
Transfer Enhancement ◽  
Design Modification ◽  
Surface Profiling ◽  
Minimal Design ◽  
Flow Turbulence ◽  
Surface Increase

Heat transfer enhancement area attracts the close attention of the researchers and engineers worldwide for the last decades. The most popular techniques nowadays to enhance heat transfer from the surface is to extend it with the fins, studs, etc. or to profile it with the elements of artificial roughness, winglets, dimples, etc. Those types of surface enhancement allow improving the thermal efficiency of the heat transfer equipment with minimal design modification and without significant capital expenses. One of the interesting and promising techniques of the surface profiling is the formation on the surface the arrangement of spherical dimples, which generate intensive vortex structure near the surface, increase flow turbulence and, as a result, enhance heat and mass transfer between a profiled surface and a liquid (or gas) flowing over it [1–3]. In this connection, it is interesting to establish whether surface profiling will also enhance the heat transfer intensity between a liquid film on such a surface and ambient air. Unfortunately, authors were not able to find any publications on this subject in the open domain. At the same time, the investigation of this process could be of great interest for the engineering practice, in particular, for the cooling towers advancement. In the present work, the authors discuss some experimental results obtained for the different profile parameters and flow regimes.

scholarly journals Computer-automated shadow moiré method and applications for 3D surface profiling

2021 ◽  
Author(s):  
Rui Zhao
Keyword(s):  
Least Square ◽  
Automated System ◽  
Image Subtraction ◽  
Full Field ◽  
Surface Profiling ◽  
Shadow Moire ◽  
Shadow Moiré ◽  
3D Surface ◽  
Measurement Resolution ◽  
Moire Method

Among numerous methods for 3D surface profiling, classic shadow moiré method has been kept as the most popular one due to its full-field feature and low cost. This thesis focuses on a computer-vision shadow moiré method with a scope to improve the measurement resolution, accuracy and efficiency. The computer automation is basically realized through the introduction of a phase-shifting technique that is incorporated with a new multi-grid least-square unwrapping algorithm. The method is enhanced by implementing a few additional image processing techniques. These techniques, when implemented, result in improved measurement accuracy and enable easy applications to irregularly shaped surfaces. The study also proposes a new, automated system calibration approach that is based on a real-time image subtraction. A data normalization process is studied to resolve possible confusions in the presentation of the original data. The verification test results show that the modified shadow moiré technique has achieved the initial goal, in that the measurement resolution now reaches a few percentage of the fringe sensititivity.

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