Use of priori information on functional relations between measured quantities for improving accuracy of measurement

Reznik, Leon; Solopchenko, G. N.

doi:10.1016/0263-2241(85)90013-2

Cited by 19 publications

(7 citation statements)

References 1 publication

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“…The idea is to observe how a parameter connected to the performances of the machine varies over time [16][17][18]. In particular, we propose to use as an indicator the characteristic of reproducibility of the coordinates of a point with a changed path of the touchprobe subsystem [19].…”

Section: The Methodsmentioning

confidence: 99%

On-Line Diagnostic Tools for CMM Performance

Franceschini

Galetto

Settineri

2002

The International Journal of Advanced Manufacturing Technology

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The on-line evaluation of the degradation of a coordinate measuring machine (CMM) performance, either due to variations of environmental factors, or to the deterioration of one of the CMM subsystems, is particularly important for the machine user. A sign of this interest is the large number of international standards that have been issued. The paper presents an approach for the on-line diagnostic of the metrological capabilities of a CMM. The method, which does not make use of additional internal or external instrumentation, is performed on-line during a normal measurement cycle. The graphical approach of the method, based on the use of control charts, permits a simple and immediate monitoring of the machine performance. Preliminary experimental results are presented and discussed.

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Section: The Methodsmentioning

confidence: 99%

On-Line Diagnostic Tools for CMM Performance

Franceschini

Galetto

Settineri

2002

The International Journal of Advanced Manufacturing Technology

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“…The temperature measurements vary in 6 -7 bits, producing a measurement error of up to 110 sensor units. These measurement errors could be substituted into formula (1), where the matrix A is composed of the coefficients calculated from the above graduation parameters and the measurement scheme applied. However, assuming that the measurements of different sensors are not correlated as they were received from different motes, we may recalculate the measurement errors in degrees, which will be 1.1 degree and apply it to all four sensors.…”

mentioning

confidence: 99%

Improving Measurement Accuracy in Sensor Networks by an Object Model Generation and Application

Reznik

Kluever

2007

2007 IEEE Sensors

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The paper describes a novel method of calculating measurement results in sensor networks, which includes modifying the conventional measurement estimates based on the object under measurement model mined from the data collected by the sensor network itself previously and other information made available by domain experts. It is shown that the model application might produce a significant gain in measurement accuracy if the model is correct. The gain value is estimated and its dependence on various factors is studied by computer simulation and experimentation with real sensor networks built from Crossbow Telos ver. B motes. The conditions of achieving the gain versus suffering the loss are derived and the recommendations of how to shape the object model in order to achieve and maximize the gain value are provided.

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“…Parameters such as variations in meesured value, rate of change of measured quantity, comparison between eipected value and actual value, noise contribut,ioii t o error, and statistical measure t o describe distribution density of measured values can be used as an accuracy measure t o dete! mine the relative precision of computed 2D information [33]. Techniques used in determining 2D and 3D niesuremeiits are outlined next.…”

Section: D and 3d Measurement Tediniquesmentioning

confidence: 99%

Precision measurement techniques using computer vision

Moon

McVey²

Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting

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As industry relies more on computer-based automat.ion, it herimes desirable to develop inspection systems that can perform precision measurements. The use of high resolution solid state image sensors can be used as a cost effective alternative to the laser technology. A survey of difierent image mensuration technologies currently used is presented. Also, an error analysis of computed measurements is briefly outlined.

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Use of priori information on functional relations between measured quantities for improving accuracy of measurement

Cited by 19 publications

References 1 publication

On-Line Diagnostic Tools for CMM Performance

On-Line Diagnostic Tools for CMM Performance

Improving Measurement Accuracy in Sensor Networks by an Object Model Generation and Application

Precision measurement techniques using computer vision

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