Apparatus and method of measuring workpieces
First Claim
1. A method for measuring a surface using a surface sensing device mounted on a scanning head on a member of a coordinate positioning apparatus, wherein the coordinate positioning apparatus is operated to produce relative movement between the scanning head and the surface, and the scanning head includes a drive for producing rotational movement of the surface sensing device about one or more axes, the method comprising:
- (a) determining a desired measurement profile on the surface which the surface sensing device will track;
(b) determining a desired motion of orientation of the surface sensing device, wherein the orientation varies relative to the surface as the surface sensing device follows the desired measurement profile;
(c) using the desired measurement profile and the desired motion of the orientation thus determined to derive a required path of a relative motion between the member of the coordinate positioning apparatus and the surface, such that the surface sensing device prescribes a trajectory along the measurement profile to measure the surface.
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Accused Products
Abstract
A method and apparatus for measuring a surface using a surface sensing device mounted on a scanning head on a member of a coordinate positioning apparatus. The coordinate positioning apparatus may be operated to produce relative movement between the scanning head and the surface profile and the scanning head includes a drive for producing rotational movement of the surface sensing probe about one or more axis. A desired measurement profile on the surface which the surface sensing device will track and the desired motion of the orientation of the surface sensing device as the surface'"'"' sensing device follows the measurement profile are defined. This data is used to derive the required path of the relative motion between the member of the coordinate positioning apparatus and the surface, such that the surface sensing device prescribes a trajectory along the measurement profile.
48 Citations
18 Claims
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1. A method for measuring a surface using a surface sensing device mounted on a scanning head on a member of a coordinate positioning apparatus, wherein the coordinate positioning apparatus is operated to produce relative movement between the scanning head and the surface, and the scanning head includes a drive for producing rotational movement of the surface sensing device about one or more axes, the method comprising:
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(a) determining a desired measurement profile on the surface which the surface sensing device will track; (b) determining a desired motion of orientation of the surface sensing device, wherein the orientation varies relative to the surface as the surface sensing device follows the desired measurement profile; (c) using the desired measurement profile and the desired motion of the orientation thus determined to derive a required path of a relative motion between the member of the coordinate positioning apparatus and the surface, such that the surface sensing device prescribes a trajectory along the measurement profile to measure the surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A non-transitory computer readable medium storing a computer program for programming a measurement path for a surface sensing device mounted on a scanning head on a member of a coordinate positioning apparatus, wherein the coordinate positioning apparatus is operated to produce relative movement between the scanning head and the surface, and the scanning head includes a drive for producing rotational movement of the surface sensing device about one or more axis, the computer program comprising code that causes a computer perform, when executed,:
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(a) determining a desired measurement profile on the surface which the surface sensing device will track; (b) determining a desired motion of orientation of the surface sensing device, wherein the orientation varies relative to the surface as the surface sensing device follows the desired measurement profile; and (c) using the desired measurement profile and the desired motion of the orientation thus determined to derive a required path of a relative motion between the member of the coordinate positioning apparatus and the surface, such that the surface sensing device prescribes a trajectory along the measurement profile to measure the surface.
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18. An apparatus for measuring a surface profile using a surface sensing device mounted on a scanning head on a member of a coordinate positioning apparatus, wherein the coordinate positioning apparatus is operated to produce relative movement between the scanning head and the surface, and the scanning head includes a drive for producing rotational movement of the surface sensing device about one or more axes, the apparatus comprising:
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a computer having a computer program stored in the computer, the computer program, when executed, causing the computer to; (a) determine a desired measurement profile on the surface which the surface sensing device will follow; (b) determine the desired motion of orientation of the surface sensing device as the surface sensing device follows the desired measurement profile; and (c) uses the desired measurement profile and the desired motion of the orientation thus determined to derive a required path of the relative motion between the member of the coordinate positioning apparatus and the surface, such that the surface sensing device prescribes a trajectory along the measurement profile to measure the surface.
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Specification