Interactive graphics system and method for modelling physical articles

Claim 2

An interactive system for modelling a physical article in mathematical terms, comprising a measurement device for taking measurements of said article, and processing means coupled to said measurements device so as to receive data on initial identification points on the article for providing automatic signals to control said measurement device in the collection of data on additional points on the article, said processing means constructing a model from all of said data; said processing means including equipment for the mathematical construction of boundary curves connecting said initial identification points for said model, equipment for the mathematical construction of a surface fitted to the boundary curves, and means for determining data collection errors due to the dimensions of said probe of said measurement device and means for mathematically constructing, on the basis of a mathematically defined surface, a second surface free of said data collection errors.

Claim 3

A system in accordance with claim 1, wherein said measurement device comprises a probe for the collection of points on the physical article, and the positioning of said probe is automatically controlled by the automatic signals from said processing means.

Claim 4

A system in accordance with claim 1, wherein said measurement device comprises a probe for the collection of points on the physical article, and the automatic signals supplied by said processing means control the positioning of said probe for the collection of said additional points.

Claim 5

A system in accordance with claim 1, wherein the data on the initial identification points for the model are supplied by said measuring device.

Claim 6

A system in accordance with claim 1, wherein the data on the initial identification points for the model and supplied by digital data processing means.

Claim 7

A system in accordance with claim 1, wherein said processing means include equipment for the mathematical construction of a surface for said model, on the basis of the fitted surface and within the boundaries set by said additional points, which where collected for said physical article.

Claim 8

A system in accordance with claim 1, wherein said processing means include equipment for the detection of deviations between said mathematical construction of the surface of said article, and the corresponding surface of said physical article.

Claim 9

A system in accordance with claim 7, said deviations are between the corresponding points of said surfaces.

Claim 10

A system in accordance with claim 7, wherein said processing means include equipment for the statistical display of said deviations.

Claim 12

A system in accordance with claim 1, wherein said processing means include equipment for the interactive approximation of curves and surfaces, based on calculations using Bezier formulas.

Claim 13

A system in accordance with claim 1, wherein said processing means are connected to display means and to communication means for an operator.

Claim 14

A system in accordance with claim 1, wherein said processing means include means for connection to an electronically controlled machine tool.

Claim 17

In a system for modelling physical articles in a form usable by a program-controlled machine, said system including measurement means capable of measuring points on the article, said system comprising: a. means for defining an area to be measured on said article by specifying to said measurement means a set of control coordinates roughly defining the boundary of said area; b. first means for operating said measurement means to acquire measurements at additional points necessary to define the boundaries with a specified degree of accuracy; c. means for modelling the boundary with a set of contour-defining equations so as to minimize the deviation thereof from the measured points; d. second means having an enabling input and being responsive to a signal received at said enabling input for operating said measurement means to acquire further measurements at selected points on the surface of said article; e. means for comparing the acquired further measurements with the values derived from the modelling contour-defining equations at the same points; said comparing means stopping further operation if the deviations are within predefined limits, and otherwise producing a continuation signal; and f. means responsive to said continuation signal for modifying the contour-defining equations to minimize deviations of the model from measured points, said means for modifying producing a control signal applied to the enabling input of said second means for operating so as to enable the same to acquire further measurements.

Claim 18

In a system for modelling physical articles in a form usable by a program-controlled machine, said system including measurement means capable of measuring points on the article, said system comprising: a. means for defining an area to be measured on said article by specifying to said measurement means a set of control coordinates roughly defining the boundary of said area; b. first means for operating said measurement means to acquire measurements at additional points necessary to define the boundaries with a specified degree of accuracy; c. means for modelling the boundary with a set of contour-defining equations so as to minimize the deviation thereof from the measured points; d. second means having an enabling input and being responsive to a signal received at said enabling input for operating said measurement means to acquire further measurements at selected points on the surface of said article; e. means for comparing the acquired further measurements with the values derived from the modelling contour-defining equations at the same points; said comparing means stopping further operation if the deviations are within predefined limits, and otherwise producing a continuation signal; and f. means responsive to said continuation signal for modifying the contour-defining equations to minimize deviations of the model from measured points, said means for modifying producing a control signal applied to the enabling input of said second means for operating so as to enable the same to acquire further measurements.