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 Title: |
US4691446:
Three-dimensional position measuring apparatus
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Pitches, Brian E.; Edinburgh, United Kingdom
Wright, David A.; Edinburgh, United Kingdom
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| Assignee: |
Ferranti plc, Cheshire, United Kingdom
other patents from FERRANTI LIMITED (NOW FERRANTI PLC) (192660) (approx. 277)
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| Published / Filed: |
1987-09-08
/ 1986-09-02
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| Application Number: |
US1986000902655
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| IPC Code: |
Advanced:
G01B 11/00;
G01B 11/24;
G01B 11/245;
G01B 21/00;
G01B 21/20;
G01S 17/87;
Core:
G01S 17/00;
more...
IPC-7:
G01C 3/10;
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| U.S. Class: |
Current:
033/516;
033/01C.C;
033/01M.P;
033/DIG.021;
356/004.01;
356/139.03;
414/730;
901/047;
Original:
033/516;
033/001.CC;
033/001.MP;
033/DIG.21;
356/001;
414/730;
901/047;
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| Field of Search: |
033/1 MD,516,1 CC,DIG.21
356/001,152,4
901/047
414/730
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| Priority Number: |
| 1985-09-05 |
GB1985000022058 |
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| Abstract: |
Apparatus for determining the position of a point movable throughout a measuring volume relative to a set of reference axes includes a probe member (10) having a probe tip (11) defining the position of the movable point. The measuring probe (10) also has first and second reference points (12, 13) spaced apart from one another and having a fixed known spatial relationship with one another and with the probe tip (11). Means (16) are provided for moving the probe member (10) so that the probe tip may be positioned at any desired point within the measuring volume. At least three distance measuring equipments (15) are provided, located outside the measuring volume at fixed known positions relative to the set of reference axes and each operable to determine the distance between it and each of the reference points (12, 13) on the probe member (10). Calculating means (19) are provided to calculate from said distance measurements the position of the probe tip (11). The distance measuring equipments (15) may be laser rangefinders, with reflectors mounted on the probe member (10) at the reference points (12, 13).
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| Attorney, Agent or Firm: |
Kerkam, Stowell, Kondracki & Clarke ;
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| Primary / Asst. Examiners: |
Martin, Jr., William D.;
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| Maintenance Status: |
E1 Expired Check current status
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| INPADOC Legal Status: |
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| Family: |
Show 9 known family members
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First Claim:
Show all 6 claims |
What we claim is:
1. Three-dimensional position measuring apparatus for determining the position of a point movable throughout a measuring volume relative to a set of reference axes, which apparatus includes a probe member having a probe tip defining the position of the movable point and first and second reference points spaced apart from one another and having a fixed known spatial relationship with one another and with the probe tip, means for moving the probe member so that the probe tip may be positioned at any desired point within the measuring volume, at least three distance meansuring equipments, each being located outside the measuring volume in a separate fixed known position relative to the set of reference axes and each operable to determine the distance between its known position and each reference point on the probe member, and calculating means responsive to the signals derived by each distance measuring equipment to determine the position of the probe tip relative to the set of reference axes.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 26 U.S. patent(s) that reference this one
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