The hybrid contact–optical coordinate measuring system

Sładek, Jerzy; Błaszczyk, Paweł; Kupiec, Magdalena; Sitnik, Robert

doi:10.1016/j.measurement.2010.11.013

Cited by 51 publications

(26 citation statements)

References 14 publications

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“…Hybrid contact-optical coordinate measuring systems are each designed by Chan [12], Carbone [13], Tzung-Sz [14] and Sladek et al [15] where the obtained information digitized by an optical sensor is used to guide the touch probe for remeasuring the sample surfaces. The presented systems are cooperative integrations where optical sensors acquire the global shape information of objects to guide the touch probes for automatic point sensing.…”

Section: Literature Reviewmentioning

confidence: 99%

Rapid and accurate reverse engineering of geometry based on a multi-sensor system

Feng

Longstaff

Fletcher

et al. 2014

Int J Adv Manuf Technol

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The reduction of the lead time in measurement and reverse engineering, and the increased requirements in terms of accuracy and flexibility, have resulted in a great deal of research effort aimed at developing and implementing multisensor systems. This paper describes an effective competitive approach for using a tactile probe to compensate the data from a laser line scanner to perform accurate reverse engineering of geometric features. With the data acquired using laser scanning, intelligent feature recognition and segmentation algorithms can be exploited to extract the global surface information of the object. The tactile probe is used to re-measure the geometric features with a small number of sampling points and the obtained information can be subsequently used to compensate the point data patches which are measured by laser scanning system. Then, the compensated point data can be exploited for accurate reverse engineering of a CAD model. The limitations of each measurement system are compensated by the other. Experimental results on three parts validate the rapidity and accuracy of this multi-sensor data fusion approach.

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Section: Literature Reviewmentioning

confidence: 99%

Rapid and accurate reverse engineering of geometry based on a multi-sensor system

Feng

Longstaff

Fletcher

et al. 2014

Int J Adv Manuf Technol

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“…The noncontact digitizer is employed to measure free-from surfaces due to its high density digitizing characteristic and high digitizing speed, while the touch probe is utilized to measure features that require low uncertainty and ones that cannot be obtained by the optical sensors due to visibility constraints, such as deep holes. Research of [26], [27] and [28] are examples of this application. Their multi-sensor systems work in a complementary way.…”

Section: Non-contact Blue Led Structured Light Scannermentioning

confidence: 99%

On Development of Methods for Expressing Customer Affective Response for Apparel Products

Zhao¹,

Montazer²,

Wang³

et al. 2015

Proceedings of CAD'15

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In dimensional metrology, contact and non-contact measurement methods each have their own respective strengths and weaknesses. Touch-trigger probes have low uncertainty, and perform well inside deep holes, but have a relatively slow data acquisition speed. By contrast, non-contact digitizers collect high density surface point clouds in seconds, and are much less likely to suffer from sensor collision with the part, but have a higher uncertainty than touch probes. In sheet metal forming, iterative design of the stamping die is needed due to the springback of the sheet metal part. Holes or other features of first article parts may be significantly out of tolerance, so the tactile measurement path created from the Computer Aided Design (CAD) nominal has to be adjusted to avoid cosine error. In more serious cases, probe collisions or missed touches may occur. When measuring holes in thin sheet metal, determination of the touch probe path height is also a challenge if the actual surface location differs from the nominal.To solve this problem and seize the complimentary advantages of contact and non-contact measurement methods, a multi-sensor blue Light Emitting Diode (LED) snapshot sensor and touch-trigger probe inspection system was developed, and affixed to a Coordinate Measuring Machine (CMM). The tactile measurement path was adjusted according to the approximate positions and sizes of the features obtained from the scanner iv data. The system includes an in-house designed calibration target for scanner calibration and a lightweight 2-axis rotary table for multiple-orientation scanning as well. Software in programming language C for interacting with the scanner and the CMM was developed.

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“…The measurement data from different devices can be aligned into a common coordinate system and registered into a whole data body. Sładek et al [11] performed numerical analysis to calculate a set of remeasured points. These points can be divided into the two sorts, one is hard or even impossible to be measured with the optical system, and the other is marked with higher precision.…”

Section: Introductionmentioning

confidence: 99%

Efficient measurement of aero-engine blade considering uncertainties in adaptive machining

Zhang

Chen

Tao

2015

Int J Adv Manuf Technol

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Blade geometry plays an extremely important role in the aerodynamic performance of aero-engine. However, in the adaptive machining process of a near-net-shape blade, it is important for an application engineer to reconstruct an actual profile with high-precision measurement data in a short time. This paper presents an efficient measurement to meet the requirement for digital information in the adaptive machining, which is also intimately associated with the previous work in reconstruction (Zhang et al. in Int J Adv Manuf Technol 2015:1-16, 2015. Comparing with conventional measurement, the proposed method can not only improve the utilization of measurement data from multi-sensor system but also consider the uncertainties of measurement and localization in data merging. Concretely speaking, the low-precision data from non-contact measurement device is used for establishing possible substitute models. The modified Bayesian information (Modi_BIC) criterion based on Bayesian statistics is introduced as the principle to select the model structure. In order to reduce misalignment errors of the selected substitute model, the statistical analysis of Fisher information matrix is applied to determine registration points. Based on this, the uncertainties can be given in the form of variation boundaries. Comparisons with the specified tolerance band determine a set of re-measured points by using a contact measurement device. The high-precision data can be merged with the selected substitute model by means of free form deformation (FFD) technique. The final measurement data is provided in the form of skinning surface that is consistent to the reverse modeling methodology of aero-engine blade. Moreover, some practical examples are given to demonstrate the effectiveness and superiority of the proposed method.

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The hybrid contact–optical coordinate measuring system

Cited by 51 publications

References 14 publications

Rapid and accurate reverse engineering of geometry based on a multi-sensor system

Rapid and accurate reverse engineering of geometry based on a multi-sensor system

On Development of Methods for Expressing Customer Affective Response for Apparel Products

Efficient measurement of aero-engine blade considering uncertainties in adaptive machining

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