Identifying features on a surface of an object using wavelet analysis
First Claim
1. A method for inspecting a surface of an object, the method comprising:
- obtaining data from measuring the surface of the object to form surface data for the object;
selecting a range of frequencies for features on the object based on a range of distances between adjacent peaks for the features, wherein the features are formed by a tool moving along a number of paths;
obtaining desired surface data for the features from the surface data using the range of frequencies selected;
determining whether the desired surface data for the features meets a policy identifying a desired surface for the object; and
responsive to an absence of a determination that the desired surface data for the features meets the policy, reworking the object.
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Accused Products
Abstract
A method and apparatus for inspecting a surface of an object. Data from measuring the surface of the object is obtained to form surface data for the object. A range of frequencies for features on the object is selected based on a range of distances between adjacent peaks for the features. The features are formed by a tool moving along a number of paths. Desired surface data for the features is obtained from the surface data using the range of frequencies selected. A determination is made as to whether the desired surface data for the features meets a policy specifying a desired surface for the object. In response to an absence of a determination that the desired surface data for the features meets the policy, the object is reworked.
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Citations
20 Claims
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1. A method for inspecting a surface of an object, the method comprising:
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obtaining data from measuring the surface of the object to form surface data for the object; selecting a range of frequencies for features on the object based on a range of distances between adjacent peaks for the features, wherein the features are formed by a tool moving along a number of paths; obtaining desired surface data for the features from the surface data using the range of frequencies selected; determining whether the desired surface data for the features meets a policy identifying a desired surface for the object; and responsive to an absence of a determination that the desired surface data for the features meets the policy, reworking the object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus comprising:
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a measurement tool configured to measure a surface of an object to generate data for the object; and a computer system configured to obtain the data from the measurement tool to form surface data for the object;
select a range of frequencies for features on the object based on a range of distances between adjacent peaks for the features, wherein the features are formed by a tool moving along a number of paths;
obtain desired surface data for the features from the surface data using the range of frequencies selected; and
indicate whether reworking of the object is needed based on the desired surface data. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A method for manufacturing an object, the method comprising:
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machining a workpiece to form the object having a surface with features formed by a tool moving along a number of paths during the machining of the workpiece; measuring the surface of the object to obtain surface data for the object; selecting a range of frequencies for the features on the object based on a range of distances between adjacent peaks for the features; obtaining desired surface data for the features from the surface data using the range of frequencies selected; determining whether the surface of the object meets a policy specifying a desired surface for the object using the desired surface data; and responsive to an absence of a determination that the surface of the object meets the policy, reworking the object such that the surface of the object meets the policy. - View Dependent Claims (20)
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Specification