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Method for reading absolute grating ruler with identification code channel by using double reading heads

A dual-reading head and grating ruler technology is applied in the direction of manufacturing tools, metal processing machinery parts, measuring/indicating equipment, etc., to achieve the effects of error elimination, reduced coding difficulty, and improved measurement range

Inactive Publication Date: 2014-11-19
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0003] The invention provides a method for reading an absolute grating ruler with an identification code track with a double reading head, and adopts a three-code track encoding method combining absolute codes, incremental codes, and identification codes to reduce the difficulty of encoding and solve the measurement of super large lengths problems, greatly reducing the difficulty of the splicing process, eliminating the influence of installation process errors on the measurement, and improving the measurement accuracy of the absolute steel tape grating ruler

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  • Method for reading absolute grating ruler with identification code channel by using double reading heads
  • Method for reading absolute grating ruler with identification code channel by using double reading heads
  • Method for reading absolute grating ruler with identification code channel by using double reading heads

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specific Embodiment approach 1

[0015] Specific implementation mode 1. Combination Figure 1 to Figure 4 Describe this implementation mode, the reading method of the absolute grating ruler with the identification code track by the double reading head, the specific implementation process is as follows:

[0016] 1. The first reading head A and the second reading head B are rigidly connected together to form the reading body 3, and there are multiple three-code steel tape grating rulers 4 sequentially fixed on the corresponding positioning surface 2 on the machine tool 1. The tape grating rulers 4 are extension lines of each other, and the ends of the adjacent steel tape grating rulers 4 may not be closely approached, or may even be separated by a relatively large distance. The reading body 3 moves along the measuring direction of the steel tape grating ruler 4 .

[0017] 2. The measurement center point of the first reading head A is a, the measurement center point of the second reading head B is b, and the di...

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Abstract

A method for reading an absolute grating ruler with an identification code channel by using double reading heads relates to the field of optical length measurement and solves the measuring problem of the existing super-length grating ruler. The method includes that a plurality of absolute steel strip rulers with the identification code channel are fixed on a locating face of a machine tool sequentially, coding adopts a method of combining an absolute code, an incremental code and an identification code, a reading body is used for switching and combining scales of the plurality of steel strip rulers so as to solve the measuring problem of super length, and absolute coding difficulty is greatly reduced. Process difficulty of a splicing process of the steel strip ruler is reduced. By using the reading body to read the scales, effects of errors in an installing process on measuring precision can be removed. By means of the method, a measuring range and measuring precision of the whole super-length absolute steel strip grating ruler are improved.

Description

technical field [0001] The invention relates to the field of optical length measurement, in particular to an absolute steel tape grating ruler with super-long double reading heads and identification code tracks. Background technique [0002] The measuring length of the absolute steel tape grating ruler can generally reach tens of meters. However, for ultra-long dimensions, such as hundreds of meters or hundreds of meters, it is difficult to realize it with a single absolute steel tape scale, and there are difficulties in encoding. The method of splicing multiple absolute steel tape rulers can extend the measurement range to a certain extent, but the existing absolute coding method combined with absolute code and incremental code cannot meet the measurement requirements of super large length. At the same time, the existing technology has high requirements on the splicing process when splicing on site; and errors are generated at each joint during the splicing process. For su...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23Q17/24
Inventor 谭向全张吉鹏孙强卢振武
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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