scholarly journals Uji Kinerja Surface Scanner 3D Menggunakan Sensor VL53L0X dan Mikrokontroler ATMEGA8535

2019 ◽  
Vol 11 (1) ◽  
pp. 1-8
Author(s):  
Putut Son Maria ◽  
Elva Susianti
Keyword(s):  
Vertical Axis ◽  
Digital Data ◽  
Processing Unit ◽  
Rotary Table ◽  
Sensor Surface ◽  
Displacement Method ◽  
3D Scanner ◽  
3 Dimensional ◽  
Motor Controller ◽  
Point To Point

Digital data recording of the geometry of 3-dimensional objects require a 3D scanner tool which are mostly using an imagery sensor. However there is hardly used information of scanned result, named color. Imagery sensor requires high spesification processing unit as capable as a personal computer for data acquisition processing. This research aims to build a 3D surface scanner using a time of flight laser ranging sensor and to develop its simple function to become more valuable device. Using point to point displacement method, the sensor measures the distance between the outermost point of the object and the sensor surface perpendicularly, once when one measurement is done then the object to be rotated along with the rotary table. The prototype was built using the VL53L0X sensor and ATMEGA8535 microcontroller as a motor controller for rotary table and vertical axis. Scanned data is sent from the microcontroller to the computer to be visualized in real time. The results show that the VL53L0X sensor is suitable for scanning convex objects but it is not capable to handle objects with multiple cavities.

scholarly journals Integrating layer by layer manufacturing for the realization of polymer complex geometries with scanning devices: re-building by digital data

2021 ◽  
Author(s):  
Carlo Bruni ◽  
Luciano Greco ◽  
Tommaso Mancia ◽  
Massimiliano Pieralisi
Keyword(s):  
Original Data ◽  
Digital Data ◽  
Complex Geometries ◽  
Polymer Complex ◽  
Layer By Layer ◽  
Input File ◽  
3D Scanner ◽  
Photo Polymerization ◽  
Layer Manufacturing ◽  
Computer Aided

The additive manufacturing technique represents a way to realize components or prototypes without the use of conventional tools.The research presented aims at proposing a methodology based on the use of three different techniques that are the poly-jet 3D using UV photo-polymerization, the FDM of polyamide materials and the FDM of PLA materials. The original data were used at the beginning with the first technique in order to detect the shape and the geometry by a 3D SCANNER. The objective was the re-building of a model shape made using a procedure in which the input file characteristics were updated starting from those got by the scanning device in order to respect the original requirements defined in the computer aided environment. It was found that the physical re-building of an object is depending the characteristics of the input file that needs to be digitally processed in order to get the desired shape and geometry. In that way also FDM using PLA and polyamide materials can be utilized to get components or prototypes from scanned digital data. The results are reported in details.

Three-Dimensional Accuracy Evaluation of Two Additive Manufacturing Processes in the Production of Dental Models

2017 ◽  
Vol 752 ◽  
pp. 119-125 ◽  
Author(s):  
Alexandru Victor Burde ◽  
Cristina Gasparik ◽  
Sorana Baciu ◽  
Marius Manole ◽  
Diana Dudea ◽  
...  
Keyword(s):  
Rapid Prototyping ◽  
Fused Deposition Modeling ◽  
Three Dimensional ◽  
Digital Data ◽  
Accuracy Evaluation ◽  
Cad Model ◽  
3D Scanner ◽  
Fused Deposition ◽  
3D Printers ◽  
Dental Models

In the current orthodontic and prosthodontics practice, study models made of plaster are being used to provide a three-dimensional view of the patient’s occlusion and allow the clinician to analyze, diagnose, or monitor anomalies. With the introduction of intraoral and extra oral digital impressions, it is now possible to obtain digital study models of the patients’ dental arches. Digital models can be obtained in a physical hardcopy via 3D printing or rapid prototyping. Although, professional 3D printers require a high initial set-up cost, low cost 3D printers can provide similar quality products. The aim of this study is to investigate the accuracy of physical dental models reconstructed from digital data by two rapid prototyping techniques. For this purpose twenty mandibular and maxillary conventional plaster models from randomly chosen subjects were selected and served as the gold standard. The casts were digitized using a 3D scanner and .stl surface models were acquired; the virtual model was adjusted for reconstruction using dedicated software, thus obtaining the CAD model of the casts. The CAD models were reconstructed using a 3D fused deposition modeling (FDM) printer, a RepRap FDM printer and an inverted stereolithography printer. The reconstructed models were digitized using a laboratory 3D scanner and the resulting Mesh datasets were compared with the CAD model using inspection software. The mean systematic differences for the 3D comparison of the reconstructed models were 0.207 mm for the stereolithography models, 0.156 mm for the FDM models, and 0.128 mm for the RepRap models. Although a technology proved the ability to manufacture a dental model with accentuated morphology, the results demonstrate that replicas of plaster casts are influenced by problems linked to the size of the detail to be reproduced, which is often similar to or finer than the fabrication layer.

scholarly journals Data driven design: An investigation into the fit between the individuality of people and the uniformity of mass manufactured items

2021 ◽  
Author(s):  
◽  
Alex Svend Christensen
Keyword(s):  
3D Printing ◽  
3D Scanning ◽  
Digital Data ◽  
Human Form ◽  
3 Dimensional ◽  
Manufacturing Efficiency ◽  
3D Printed ◽  
Body Shapes ◽  
The Individual ◽  
Motorcycle Rider

<p>Due to the economic advantage of mass manufacturing technology humans have designed a world of products built for the average body size and shape. This conformity of diverse body shapes to fixed 3 dimensional forms raises the question for this research; how can 3D scanning and additive manufacturing (AM) create a personal fit between an individual’s body and a product?  This question challenges a tool driven standardised approach to manufacture by exploring the interface between a person and a mass produced product, in this case a motorcycle rider and a motorcycle. By taking advantage of digital data and the tool-less build process of 3D printing, every object produced can be different, tailoring it to the customer’s individual aesthetic or physical fit.  This investigation into the space between the motorcycle and the human has produced a custom 3D printed seat designed for and inspired by the unique physicality of the individual rider. The following methods are employed. 3D scanning is used to obtain the geometry of the human form and motorcycle, 3D modelling and 3D printing to generate and evaluate ideas and concepts, and a pressure measurement system to evaluate the riders comfort and fit.  This new relationship between body and object, rarely seen in mass produced products, questions the way we design and make products with consideration towards digital personalisation and manufacturing efficiency.</p>

scholarly journals Designing a Nasal Prosthesis using CAD-RP Technology

2012 ◽  
Vol 2 (3) ◽  
pp. 108-112
Author(s):  
R Vanitha ◽  
K Ramkumar ◽  
G Rajtilak ◽  
V Rajasekar
Keyword(s):  
Digital Data ◽  
3D Image ◽  
3 Dimensional ◽  
Digital Database ◽  
Nasal Prosthesis ◽  
Nasal Defect ◽  
Patient Reported ◽  
Defect Area ◽  
Computer Aided ◽  
Data Files

ABSTRACT A 37-year-old female patient reported to the hospital with a nasal defect due to carcinoma. She was previously restored with nasal prostheses, but was not satisfied with its cosmetic appeal. A computerized tomographic (CT) scan of the defect area was made and converted into 3- dimensional (3D) digital data using dedicated medical imaging software. From the 3D image, measurements of the defect were calculated and compared with various nasal fossa measurements available in the digital database. A 3D nose model which had measurements that closely matched the defect area was extracted and superimposed on the defect area and margins adjusted. The data files were then sent for rapid prototyping (RP). A RP model was fabricated which was duplicated in wax and processed. The final result was a nasal prosthesis that conformed well to the patients’ face and was also esthetically acceptable. The main advantage of computer-aided designing (CAD)-RP is that it allows trying various nasal forms on the patients face within few hours. This saves chair time, eliminates the impression step and provides patient and dentist an option of variety. How to cite this article Vanitha R, Ramkumar K, Rajtilak G, Rajasekar V. Designing a Nasal Prosthesis using CAD-RP Technology. Int J Prosthodont Restor Dent 2012;2(3):108-112.

A New Readout System for LC Resonant Sensors

2014 ◽  
Vol 609-610 ◽  
pp. 957-963
Author(s):  
Bing Er Ge ◽  
Ting Liang ◽  
Ying Ping Hong ◽  
Chen Li ◽  
Wei Wang ◽  
...  
Keyword(s):  
Output Voltage ◽  
Experimental System ◽  
Digital Data ◽  
Measurement Unit ◽  
Processing Unit ◽  
Post Processing ◽  
Readout System ◽  
Resonant Sensor ◽  
Inductively Coupled ◽  
Resonance Frequencies

A new readout system based on LC resonant sensor is presented. The readout system consists of a reader coil inductively coupled to the LC resonant sensor, a measurement unit, and a PC post processing unit. The measurement unit generates an output voltage representing the sensor resonance, converts the output voltage to numerical form, and saves the converted digital data. The PC post processing unit processes the digital data and calculates the sensor's resonance frequency. The readout system enables wireless interrogation and its accuracy is exemplified by an experimental system. The experimental system can detect the resonant frequency of sensor automatically and effectively. The experimental results are presented for different sensor resonance frequencies with various sensor capacitance values and show good agreement with the theoretical results. The entire design is simple, easy to use, and widely applicable for applications where the coupling distance between sensor and reader coil is variable.

Patterns on the rocks: report on recent work to survey rock art sites in the Wadi al-Hayat, Fezzan

2005 ◽  
Vol 36 ◽  
pp. 121-134 ◽  
Author(s):  
T. F. Barnett
Keyword(s):  
Spatial Distribution ◽  
Laser Scanning ◽  
Cultural Landscape ◽  
Rock Art ◽  
Environmental Data ◽  
Digital Data ◽  
Distribution Model ◽  
3 Dimensional ◽  
Full Dataset ◽  
University Of Bristol

AbstractThis article reports on survey work carried out in December and January 2004/5 to identify and record rock engravings in the Wadi al-Hayat (previously called the Wadi al-Ajal). This work builds on previous surveys carried out under the aegis of the Fezzan Archaeological Project (FAP) (Barnett 2002; Barnett and Roberts 2003; Mattingly et al. 2003).During this season, systematic survey identified over 300 engraved panels which included all stylistic ‘phases’ known to be present in the wadi (Barnett in Mattingly et al. 2003). When these engravings are incorporated into the spatial distribution model derived from previous field seasons, the preliminary patterns this model describes are no longer wholly applicable. Instead, a more complex and subtle spatial distribution is indicated, in which there appears to be the interplay of several separate relationships between die engravings and die cultural landscape. To avoid misleading interpretation, detailed analysis of die rock art and integration with cultural and environmental data will be attempted only once a full dataset has been gathered on completion of the fieldwork. In the meantime, this paper describes what has been achieved this season. It presents a broad overview of the patterns of rock art distribution as they appear so far with an incomplete dataset and points die way to future fieldwork.One of the key additional aims of the fieldwork this season was to develop an appropriate recording ʿtoolkitʾ. This included piloting state-of-the-art digital technology to establish its accessibility and value in this environment. Working in collaboration with a team from the University of Bristol, die project applied surface laser scanning to capture 3-dimensional digital data from 14 separate engraved panels. This is die first time this technique has been used to record rock art in North Africa and this provided an unprecedented opportunity to explore its potential for future heritage applications.

scholarly journals A Phantom Study on Target Localization Accuracy Using Cone-Beam Computed Tomography

2008 ◽  
Vol 2 ◽  
pp. CMO.S808 ◽  
Author(s):  
Hui Yan ◽  
Liwei Zhang ◽  
Fang-Fang Yin
Keyword(s):  
Computed Tomography ◽  
Image Registration ◽  
Cone Beam Computed Tomography ◽  
Vertical Axis ◽  
Target Localization ◽  
Cone Beam ◽  
Detection Error ◽  
Localization Accuracy ◽  
3 Dimensional ◽  
Residual Errors

The purpose of this study is to evaluate the 3-dimensional target localization accuracy of cone-beam computed tomography (CBCT) using an on-board imager (OBI). An anthropomorphic pelvis phantom was used to simulate a range of offsets in the three translational directions and rotations around each of the three axes. After a translational or rotational offset was applied, a CBCT scan of the phantom was followed by image registration to detect the offsets in six degrees. The detected offsets were compared to the offset actually applied to give the detection error of the phantom position. Afterwards, the phantom was positioned by automatically moving the couch based on the detected offsets. A second CBCT scan followed by image registration was performed to give the residual error of the phantom positioning. On the average the detection errors and their standard deviations along the lateral, longitudinal and vertical axis are 0.3 ± 0.1, 0.3 ± 0.1 and 0.4 ± 0.1 mm respectively with respect to translational shifts ranging from 0 to 10 mm. The corresponding residual errors after positioning are 0.3 ± 0.1, 0.5 ± 0.1 and 0.3 ± 0.1 mm. For simulated rotational shifts ranging from 0 to 5 degrees, the average detection error and their standard deviation around lateral, longitudinal, and vertical axes are 0.1 ± 0.0, 0.2 ± 0.0, and 0.2 ± 0.0 degrees respectively. The residual errors after positioning are 0.4 ± 0.1, 0.6 ± 0.1, and 0.3 ± 0.1 mm along the lateral, longitudinal and vertical directions. These results indicate that target localization based on CBCT is capable of achieving sub-millimeter accuracy.

scholarly journals ABOUT DETERMINING THE POSITION OF THE GEOGRAPHIC MERIDIAN THREE-STAGE PENDULUM GYROCOMPASS DURING ACCELERATION OF ITS ROTOR

2014 ◽  
pp. 49-54
Author(s):  
Володимир Миколайович Федоров
Keyword(s):  
Indirect Method ◽  
Operation Mode ◽  
Vertical Axis ◽  
Processing Unit ◽  
Position Sensor ◽  
Single Measurement ◽  
Angle Sensor ◽  
Azimuthal Position ◽  
Torsion Suspension ◽  
Northerly Direction

The article considers three-stage pendulum gyrocompass ground with torsion suspension unmanaged sensor, equipped with high-precision digital angle sensor azimuthal position sensor and information processing unit. During processing of information isused an indirect method to get facts about initial deviations of dynamical systems.In the process of improving the instrument have revealed that a further increasing of accuracy due to the necessity to consider the following factors. During the measurement around the vertical axis of the sensor operates permanent uncontrolled moment due to operational reasons are different from measurement to measurement. Specified point shifts the center of oscillation of the azimuthal sensor, which is in accordance with the procedure identified azimuth northerly direction on a constant value. For self-compensation of this error have been proposed several methods based on measurements with different but fixed parameters of the device. However, these measures have extended more than twice the measurement process.In this article there is proposing to define the position of the geographic meridian based on the analysis of the azimuthal motion sensor gyro during acceleration of its rotor. The proposal can bring dual gain in reducing measurement time: at first, the rotor becomes "staff " rather than ballast gyro operation mode, as it was before; secondly, there is no need for special measures to combat harmful vertical moments, as the shift of the equilibrium caused by the action of the latter, is variable in time, which allows to determine the magnitude of harmful moment during a single measurement.

Canal–Otolith Interactions After Off-Vertical Axis Rotations. II. Spatiotemporal Properties of Roll and Pitch Postrotatory Vestibuloocular Reflexes

2005 ◽  
Vol 93 (3) ◽  
pp. 1633-1646 ◽  
Author(s):  
Bernhard J. M. Hess ◽  
Karin Jaggi-Schwarz ◽  
Hubert Misslisch
Keyword(s):  
Internal Representation ◽  
Vertical Axis ◽  
Head Orientation ◽  
Physical Constraints ◽  
3 Dimensional ◽  
Spatiotemporal Characteristics ◽  
3D Space ◽  
The Earth ◽  
Eye Velocity ◽  
Eigenvectors And Eigenvalues

We have examined the spatiotemporal characteristics of postrotatory eye velocity after roll and pitch off-vertical axis rotations (OVAR). Three rhesus monkeys were placed in one of 3 orientations on a 3-dimensional (3D) turntable: upright (90° roll or pitch OVAR), 45° nose-up (45° roll OVAR), and 45° left ear-down (45° pitch OVAR). Subjects were then rotated at ±60°/s around the naso-occipital or interaural axis and stopped after 10 turns, in one of 7 final head orientations, each separated by 30°. We found that postrotatory eye velocity showed horizontal–vertical components after roll OVAR and horizontal–torsional components after pitch OVAR that varied systematically as a function of final head orientation. The quantitative analysis suggests that, in contrast to the analogous yaw OVAR paradigm, a system of up to 3 real, gravity-dependent eigenvectors and eigenvalues determines the spatiotemporal characteristics of the residual eye velocities after roll and pitch OVAR. One of these eigenvectors closely aligned with gravity, whereas the other 2 determined the orientation of the earth horizontal plane. We propose that the spatial characteristics of eye velocity after roll and pitch OVAR follow the physical constraints of stationary orientation in a gravitational field and reflect the brain’s best estimate of head-in-space orientation within an internal representation of 3D space.

scholarly journals ROS OS based environment mapping of Cyber Physical System Lab by Depth sensor

2020 ◽  
Vol 7 (1.) ◽  
Author(s):  
ROHIT SINGH CHAUHAN
Keyword(s):  
Physical System ◽  
Industry 4.0 ◽  
Industrial Revolution ◽  
Cyber Physical System ◽  
Main Task ◽  
Processing Unit ◽  
Depth Sensor ◽  
3 Dimensional ◽  
Localization And Mapping ◽  
Xbox Kinect

The 21st century is a century of Robotics and thus the appearance of robots in the industries made the “Industrial Revolution 4.0” in which we can control and analyse the system using HMI’s or wirelessly over network and it’s a great example of industry 4.0 component. Nowadays robots are very important part of industry’s processing unit as they have the tendency to work 24*7 thus increases the efficiency of processing and production unit.  In our project a depth sensor (Microsoft’s Xbox Kinect) is mounted on a mobile robot whose main task is to map our Cyber Physical System Lab in 3-Dimensional which uses a ROS OS software installed on linux machine.  The robot will use a Simultaneous localization and mapping (SLAM) process to map an environment while currently generating an estimate for the location of the Robot.

Sign in / Sign up

Export Citation Format

Share Document