A sealed grating ruler scanner
A technology of grating rulers and scanners, which is applied in the direction of instruments, optical devices, and measuring devices, can solve the problems of grating scanners losing correct measurement functions, reducing reliability, and losing numbers, achieving high reliability, high precision, and The effect of picking up measurement signals in a large range
Inactive Publication Date: 2016-08-17
NORTH CHINA INST OF AEROSPACE ENG
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Problems solved by technology
[0007] The object of the present invention is to provide a sealed grating scale scanner, which solves the technical problem that the grating scanner loses the correct measurement function when the scale grating lines are completely destroyed in the prior art; the present invention also solves the problem in the prior art When the raster scanner moves to the seam of any two steel scale gratings, the reliability is reduced and the number is lost.
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[0033] The technical solutions in the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0034] ginseng Figure 1 to Figure 3 As shown, the grating scale scanner is a sealed grating scale scanner, including a scale grating 28. The scale grating 28 can be a steel tape scale grating, a glass scale grating, or a metal scale grating. In this embodiment, the scale grating 28 is preferably a steel tape scale grating.
[0035] The scale grating 28 is fixed on the scale housing 29 of the sealed scale main body.
[0036] The grating ruler scanner also inc...
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The invention discloses a sealed grating scale scanner comprising a comprising a scale grating and a grating reading head. The grating reading head comprises a grating optical system and a circuit system. The circuit system carries out signal processing on moire fringes generated through the action of the grating optical system and the scale grating and sends an obtained signal to a display device for displaying. The circuit system comprises two same sub-systems: a first circuit system and a second circuit system. When an abnormal signal occurs in one sub-system, the other sub-system can still work normally. When the abnormal signal occurs in any group of the circuit sub-systems, the other group of the circuit sub-system can still output a normal grating measurement optoelectronic signal independently after being processed by a signal processing circuit.
Description
technical field [0001] The application belongs to the field of linear length measurement, in particular to a sealed grating ruler scanner. Background technique [0002] Sealed steel tape scale (also known as sealed steel tape grating line displacement sensor) consists of a scale scanner (also called grating read head) and a sealed steel tape scale body (mainly containing the steel tape scale Grating, ruler shell, sealing rubber strip and other parts), the sealed steel tape grating scanner is a scanning pickup for grating measurement signals, which is composed of optical, mechanical and electrical integration; sealed steel tape The grating ruler is a key functional component for large and ultra-large high-end CNC machine tools, basic manufacturing equipment, and testing equipment for position measurement and control feedback. It plays a very important role in improving the working accuracy, work efficiency and intelligence level of the whole machine . [0003] At present, t...
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IPC IPC(8): G01B11/00
Inventor 李国洪杨朝王晓孙东辉高峰张一钢许殊罡史淑华
Owner NORTH CHINA INST OF AEROSPACE ENG