Reverse engineering of simple surfaces of unknown shape with touch probes: Scanning and compensation issues

Vosniakos, George–Christopher; Giannakakis, Titos

doi:10.1243/095440503321628233

Cited by 8 publications

(5 citation statements)

References 8 publications

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“…When the probe moves normally to the surface being contacted, then the actual contact point is found by adding to the sphere centre a vector with the magnitude of the sphere radius and the direction of probe movement [3]. In combustor, there is divergent angle of β° on the top wall from 3H to 10H length of the combustor.…”

Section: Cmm Probe Compensation During Measurement On Combustor Surfa...mentioning

confidence: 99%

Evaluation of Internal Flow Path of two Module Scramjet Combustor Through Sectional Measurement

Singh,

Ashok Ponram,

Hari Prasad

et al. 2023

joast

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The Internal flow path of a scramjet combustor consists a gradual varying cross sectional area along the combustor axis. The performance evaluation and prediction of combustor are based on Computational Fluid Dynamics (CFD) and Structural Analysis simulations which are carried out on a designed 3D CAD model. Due to manufacturing process constraints and assembly process there can be deviation in the hardware from the designed internal flow path of combustor. Thus it is necessary to determine the actual internal flow path of combustor, which in turn can be used for CFD and structural analysis simulations for better performance evaluation and predictions. The paper presents the methodology developed for evaluation of cross-sectional areas along the combustor axis and generation of 3D surface CAD model of actual internal flow path using CNC Coordinate Measuring Machine (CMM) and design CAD software. It also includes the methods adopted for CMM probe compensation while measuring slopes on the combustor surface and for the measurement of inaccessible surfaces by Ultrasonic Thickness Measuring Instrument.

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Section: Cmm Probe Compensation During Measurement On Combustor Surfa...mentioning

confidence: 99%

Evaluation of Internal Flow Path of two Module Scramjet Combustor Through Sectional Measurement

Singh,

Ashok Ponram,

Hari Prasad

et al. 2023

joast

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“…Studies on robotic tactile exploration have been driven by research in different fields: robotic grasping and manipulation [1], reverse engineering [2] and computational geometry [3].…”

Section: A Previous Workmentioning

confidence: 99%

“…All these methods use either a dense, evenly spaced grid to collect data points, or assume that the data have been previously collected. The importance of intelligently selecting where to collect data for effective exploration has been recognized in [2], but the method in this work is still tied to a grid sampling concept and therefore inherently uses dense data.…”

Section: A Previous Workmentioning

confidence: 99%

Tactile robotic mapping of unknown surfaces: an application to oil well exploration

Mazzini

Kettler

Dubowsky

et al. 2009

2009 IEEE International Workshop on Robotic and Sensors Environments

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World oil demand and advanced oil recovery techniques have made it economically attractive to rehabilitate previously abandoned oil wells. This requires relatively fast mapping of the shape and location of the down-hole well structures. Practical factors prohibit the use of visual and other range sensors in this situation. Here, the feasibility of robotic tactile mapping is studied. A method is developed that only uses the robot joint encoders and avoids any force or tactile sensor, which are complex and unreliable in such a hostile environment. This paper addresses the general problem of intelligent tactile exploration of constrained internal geometries where time is critical. It is assumed that the time required to move a manipulator to acquire a new touch point outweighs computational time. This approach models the down-hole structures with geometric primitives and focuses on exploration efficiency by intelligently searching for new touch points to build the geometric models. The algorithms developed here are shown in simulations and hardware experiments to substantially reduce the data acquisition effort for exploration with a tactile manipulator.

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“…The authors of the paper [11] presented a method for determining the direction of probe radius correction based on measurements of two groups of points, each of them containing two points located at the other sides of a given indicated measured point at which a correction vector is being sought. Each group of points represents an individual, different direction of a measured surface and defines some individual vector.…”

Section: Introductionmentioning

confidence: 99%

An Algorithm of Form Deviation Calculation in Coordinate Measurements of Free-Form Surfaces of Products

Magdziak

2016

SV-JME

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The article presents the new method of form deviation calculation in the case of coordinate measurements of free-form surfaces of workpieces. The proposed algorithm of form deviation evaluation is based on the interpolation process of corrected measured points. Corrected measured points are the results of probe radius correction process applied in the coordinate measuring technique. The interpolation is conducted by using of the Lagrange and Chebyshev methods. The developed algorithm of deviation calculation can be implemented in most commercial software cooperating with a coordinate measuring machine. In the article the results of numerical and experimental investigations connected with the proposed algorithm are presented. The numerical investigations concern the simulation of contact coordinate measurements of products, which can be conducted on a coordinate measuring machine. The measured products are composed of free-form surfaces characterized by various curvature and consequently various degree of geometric complexity. The experimental investigations were conducted in order to verify the results of simulation studies. The presented method improves the accuracy of measurements of free-form surfaces of products.

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Reverse engineering of simple surfaces of unknown shape with touch probes: Scanning and compensation issues

Cited by 8 publications

References 8 publications

Evaluation of Internal Flow Path of two Module Scramjet Combustor Through Sectional Measurement

Evaluation of Internal Flow Path of two Module Scramjet Combustor Through Sectional Measurement

Tactile robotic mapping of unknown surfaces: an application to oil well exploration

An Algorithm of Form Deviation Calculation in Coordinate Measurements of Free-Form Surfaces of Products

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