Patent US2125156A successfully refreshed from Google Patents.
EP0155084A1
Expired / Lapsed
EP
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Device for measuring the shape of a three-dimensional object
Assignee: Toshiba Corp
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Filing: 1985-02-13
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Granted: —
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Expires: 2005-02-13
Abstract
Abstract A device for measuring the shape of a three-dimensional object comprises a movable arm (1) composed of a plurality of movable arm members (4, 5, 6) and a probe (8) coupled to a forward end of the movable arm by a universal joint. At each of the movable arm members and probe, there is provided an angle-of-rotation encoder for detecting the angle of rotation. In order to measure the shape of the three-dimensional object with a lesser number of measuring times, the probe (8) has a flat surface portion (8a) at its forward end which contacts the object. A calculating section calculates the direction of the flat surface portion of the probe in contact with the object, on the basis of the information from the angle-of-rotation encoders and the known information on dimensions of the movable arm, to thereby determine a tangent plane of the object at a contact point between the flat surface portion and the object, and determines the shape of the object from a plurality of tangent planes at the contact points.
Inventors
- 👤 Takashi C/O Patent Division Moriyasu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 15:23
CPC Classifications
B; B25; B25J; B25J17/00; B25J17/02; B25J17/0258; B25J17/0275; B25J9/00; B25J9/02; B25J9/04; G; G01; G01B; G01B7/00; G01B7/004; G01B7/28
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
214 words
In a device for measuring the shape of a three-dimensional object which comprises a movable arm (1) having a plurality of movable arm members (4, 5, 6) coupled in tandem to; a probe (8) coupled to a forward end of said movable arm by a universal joint for contacting a three-dimensional object; angle-of-rotation encoder means (lla to llf) for detecting the angles of rotation of said movable arm members and said probe; ana calculating means (12) for calculating the shape of said three-dimensional object on the basis of information from said angle-of-rotation encoder means and known information on dimensions of said movable arm, characterized in that said probe has a flat surface portion (8a) at its forward end which is in contact with said three-dimensional object; and said calculating means (12) calculates the direction of said flat surface portion of said probe in contact with said three-dimensional object, on the basis of both the information of said angle-of-rotation encoder means and the known information, to thereby determine a tangent plane of said three-dimensional object at the contact point between said flat surface portion (8a) and said three-dimensional object and determines the shape of said three-dimensional object from a plurality of tangent planes at contact points between said flat surface portion and said three-dimensional object.
Claim 2
Dependent Claim
214 words
In a device for measuring the shape of a three-dimensional object which comprises a movable arm (1) having a plurality of movable arm members (4, 5, 6) coupled in tandem to; a probe (8) coupled to a forward end of said movable arm by a universal joint for contacting a three-dimensional object; angle-of-rotation encoder means (lla to llf) for detecting the angles of rotation of said movable arm members and said probe; ana calculating means (12) for calculating the shape of said three-dimensional object on the basis of information from said angle-of-rotation encoder means and known information on dimensions of said movable arm, characterized in that said probe has a flat surface portion (8a) at its forward end which is in contact with said three-dimensional object; and said calculating means (12) calculates the direction of said flat surface portion of said probe in contact with said three-dimensional object, on the basis of both the information of said angle-of-rotation encoder means and the known information, to thereby determine a tangent plane of said three-dimensional object at the contact point between said flat surface portion (8a) and said three-dimensional object and determines the shape of said three-dimensional object from a plurality of tangent planes at contact points between said flat surface portion and said three-dimensional object.
Claim 3
Dependent Claim
24 words
A device according to claim 1, characterized in that said flat portion of said probe is provided perpendicular to an axis of said probe.
Claim 4
Dependent Claim
30 words
A device according to claim 1, characterized in that said probe has a plurality of flat portions, one of said flat portions being selectively used in calculating the tangent plane.
Claim 5
Dependent Claim
17 words
A device according to claim 1, characterized in that said flat portion of said probe is circular.
Claim 6
Dependent Claim
17 words
A device according to claim 1, characterized in that said flat portion of said probe is star-shaped.
Claim 7
Dependent Claim
26 words
A device according to claim 1, characterized in that said calculating means uses a rectangular coordinate system in determining the tangent plane of the three-dimensional object.
Claim 8
Dependent Claim
26 words
A device according to claim 1, characterized in that said calculating means uses a cylindrical coordinate system in determining the tangent plane of the three-dimensional object.
Claim 9
Dependent Claim
26 words
A device according to claim 1, characterized in that said calculating means uses a polar coordinate system in determining the tangent plane of the three-dimensional object.
References Cited (Backward Citations)
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