An Absolute Photoelectric Encoding Device
A technology of photoelectric encoding and encoding devices, which is applied in the direction of measuring devices, instruments, and conversion sensor outputs, etc., can solve the problems of complex recording of encoding stripes, difficult identification of encoding stripes, and low reading efficiency of encoders, so as to improve anti-interference ability, Improvement of defects and improvement of reading efficiency
Active Publication Date: 2020-09-11
BEIJING INSTITUTE OF TECHNOLOGYGY
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[0004] In view of this, the present invention provides an absolute photoelectric encoder, using encoders with different height coding holes, two or more photoelectric devices and controllers to construct an absolute photoelectric encoder, which can solve the problem of encoder reading Problems such as low extraction efficiency, complicated recording of coded stripes and difficult identification of coded stripes
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[0020] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0021] The invention provides an absolute photoelectric encoding device, the basic idea of which is: the encoder uses square holes of different heights to represent binary 0 and 1, and two or more groups of Optoelectronic equipment (a group of optoelectronic equipment refers to a pair of optoelectronic equipment including transmitting equipment and receiving equipment), and the two sets of optoelectronic equipment correspond to the upper and lower halves of the coding hole respectively to realize information reading. The specific reading process is that when the two groups of photoelectric devices on both sides of the coding hole detect signals, it means that the hole between the photoelectric devices is a tall square hole, which represents binary 1; When only one group of photoelectric devices detects a signal, it means that the low square hole is locat...
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The invention discloses an absolute photoelectric encoding device. An absolute photoelectric encoder is constructed by using an encoder with encoding holes of different heights, two or more groups ofphotoelectric equipment and a controller, and the problems of low reading efficiency of the encoder, complex recording of encoding fringes and difficult recognition of encoding fringes can be solved.Square encoding holes of different heights are used to represent 0 and 1 of the binary system. The at least two groups of photoelectric equipment are respectively aligned with the upper and lower parts of the square encoding holes. The binary value represented by the square holes can be directly judged by judging whether the two groups of photoelectric equipment have signals or not, without the need to measure the pulse width of obtained level signals. Therefore, the reading efficiency of the encoder is improved.
Description
technical field [0001] The invention relates to the field of photoelectric measurement, in particular to an absolute photoelectric encoding device. Background technique [0002] At present, there are mainly two types of photoelectric encoders: shaft-angle encoders and linear displacement encoders. To achieve absolute coding, the code disc (shaft-angle encoder) and yardstick (linear displacement encoder) mostly adopt square shapes of different widths. holes to represent binary 0 and 1, combined with the selected encoding method to achieve angular position measurement and displacement monitoring. [0003] Using square holes with different widths to represent binary 0 and 1 requires secondary processing of the photoelectric signal. Because photoelectric equipment (taking infrared sensors as an example) can obtain level signals of different widths through holes of different widths, and thus obtain signals with pulse widths that change according to certain rules, it is necessary...
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IPC IPC(8): G01D5/347
CPCG01D5/3473G01D5/34776
Inventor 陈晓鹏黄强程炜汪常进李敬甘明刚张伟民
Owner BEIJING INSTITUTE OF TECHNOLOGYGY