Method for reading absolute type steel strip grating rulers by adopting double reading heads
A dual-reading head, absolute technology, applied to metal processing machinery parts, measuring/indicating equipment, metal processing equipment, etc., can solve the problems of single-reading head cumulative error, error, etc., to improve measurement accuracy, reduce process difficulty, The effect of increasing the measurement range
Inactive Publication Date: 2014-11-19
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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[0003] In order to solve the existing problem that there is an error at each joint when the measurement range of multiple steel tape rulers is realized by splicing, and the problem of cumulative error when a single reading head is used to read data, the present invention provides a double reading head Reading method of absolute steel tape scale
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specific Embodiment approach 1
[0012] Specific implementation mode 1. Combination figure 1 Describe this embodiment, adopt double readhead to the reading method of absolute type steel band grating scale, the device that this method comprises is machine tool 1, multiple steel band scales 4 and reading body 3, and described multiple steel band scales 4 are fixed in sequence On the positioning surface 2 of the machine tool 1, there is a gap between every adjacent steel tape ruler 4; the reading body 3 moves left and right along the measuring direction of the steel tape ruler, and the reading body 3 is formed by the first reading head R and the second reading head R. The composition of two reading heads S;
[0013] The reading body 3 described in this embodiment is rigidly connected together by the reading head R and the reading head S. A plurality of steel tape rulers 4 are sequentially fixed on the corresponding positioning surface 2 on the machine tool 1, and the plurality of steel tape rulers 4 are mutual ...
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The invention provides a method for reading absolute type steel strip grating rulers by adopting double reading heads and relates to the field of optical length measurement. The problem that when a splicing mode is adopted to achieve a measurement range of a plurality of steel strip rulers currently, errors occur at each joint and accumulated errors occur when a single reading head is adopted to read data is solved. The plurality of absolute type steel strip rulers are sequentially fixed on a positioning plane of a machine tool, spaces between the adjacent absolute type steel strip rulers are not required to be strictly consistent in the splicing installing process of the adjacent absolute type steel strip rulers, the double reading heads are adopted to perform combined reading on the plurality of absolute type steel strip rulers, namely during measurement the two reading heads read simultaneously, and a choice is made according to the conditions when data are output. Large-length measurement is achieved, and the process difficulty of the splicing process of the absolute type steel strip rulers is greatly reduced. Influence of the errors on measurement precision in the installing process can be eliminated by utilizing the double reading heads to read, and measurement precision of the whole large-length absolute type steel strip grating rulers is improved.
Description
technical field [0001] The invention relates to the field of optical length measurement, in particular to a large-length double-reading head absolute steel tape grating scale. Background technique [0002] The measuring length of the absolute steel tape grating ruler can generally reach tens of meters. But for a longer size, it is difficult to achieve it with a general single absolute steel tape scale. The method of splicing multiple steel tape rulers can extend the measurement range, but the splicing process requires high requirements when using the existing technology; errors are generated at each joint during the splicing process, and the errors accumulate in the length direction, which is harmful to the measurement. Accuracy has a great impact; single-reading head data reading mode, there are accumulated errors in the read data. Contents of the invention [0003] In order to solve the existing problem that there is an error at each joint when the measurement range of...
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IPC IPC(8): B23Q17/00B23Q17/24
Inventor 谭向全张吉鹏孙强卢振武
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI