Measuring system for recording absolute angular or position values

• US 6,912,797 B2
• Filed: 07/23/2002
• Issued: 07/05/2005
• Est. Priority Date: 04/05/2001
• Status: Expired due to Fees

• Current Assignee: Anton Rodi
• Original Assignee: Anton Rodi
• Inventors: Rodi, Anton
• Primary Examiner(s): Fulton, Christopher W.
• Assistant Examiner(s): REIS, TRAVIS M
• Application Number:
  US10/200,901
• Publication Number:
  US 20020170200A1
• Time in Patent Office: 1,078 Days
• Field of Search: 337/06, 337/07, 337/08, 337/61, 337/62, 337/63, 337/55
• US Class Current: 33/707
• CPC Class Codes: G01B 7/003 for measuring position, not involving coordinate determination coordinate measuring G01B7/004
• CPC Class Codes: G01D 5/2458 with incremental and absolute tracks on separate encoders

Abstract

A measuring system for the recording of angular or position values, wherein the scale includes a measurement track with absolute encoding, and which is scanned by a sensor is provided. The scale is composed of at least two segments with similar absolute encoding, and a suitable track is provided on the scale with which the absolute value of the particular segment reached is calculated by a further sensor arrangement. The total absolute value is then gained from the combination of both absolute values.

Claims

1. A linear measuring system, comprising:

a scale including at least two segments identically created for the generation of absolute values, each of said at least two segments including a measurement track for generating the absolute value within said segments being recorded by an appropriate scanning head, and at least one suitable track being at least one part of said measurement track for determining the absolute value of the particular segment reached by a sensor arrangement; and

a switching device using the generated absolute value within said segments and the determined absolute value of said segment to provide the total absolute value for further processing.

2. The measuring system according to claim 1, wherein said at least one suitable track is composed of one or more tracks.

3. The measuring system according to claim 1, wherein said segments are constructed with the same code sections.

4. The measuring system according to claim 1, further comprising an auxiliary power battery outside or inside said sensor arrangement for emergency supply.

5. The measuring system according to claim 1, comprising at least two identical and staggered scanning heads whose measured values are used for redundant signal evaluation by an external control system.

6. The measuring system according to claim 1, wherein the measuring system is based on at least one system selected from the group consisting of an optical, a magnetic, an inductive, an electromagnetic and a capacitive measuring system.

7. The measuring system according to claim 1, wherein the absolute value of said segment reached is determined by logical evaluation of traversed segments from a defined starting position.

8. The measuring system according to claim 1, wherein the absolute value of the segments and the determined absolute value within the segment are linear values.

9. The measuring system according to claim 1, wherein the absolute value of the segments and the determined absolute value within the segment are angular values.