Photoelectric encoder mode conversion device
A photoelectric encoder and mode conversion technology, which is applied in the direction of transmission of sensing components using optical devices, which can solve the problems of loss of position information and unsatisfactory measurement accuracy.
Inactive Publication Date: 2011-04-06
DALIAN NATIONALITIES UNIVERSITY
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Problems solved by technology
The photoelectric encoder has the following shortcomings in the high-precision application of maintaining position information: ① Using the technical solution of the incremental photoelectric encoder, although the measurement accuracy of the system can be maintained, the position information will be lost after the power is turned off
②Adopt the technical solution of absolute photoelectric encoder, although the position information can be maintained, but the measurement accuracy of the system cannot meet the requirements
Method used
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Embodiment 1
[0017] The present invention will be further described below in conjunction with accompanying drawing:
[0018] As shown in Figure 2, U1 is a single-chip microcomputer W77E58, U2——U5 is a reversible counter 74LS193, U6——U11 is a line driver MAX190, U12 is a signal buffer AM26LX32, U13 is a phase detection module PDC9301, U14 is a signal comparator 74LS688, U15 is a signal delayer 74LS07, U16 is a memory DS12877, U17 is a liquid crystal LCD1602, U18 is a dial BCD, U19 is a dial BCD, U20 is a signal indicator LED, U21 is a six inverter 74LS04, U22 is a four 2 input AND gate 74LS08, U23 is four 2-input NAND gate 74LS00, J1 is 8-pin plug DDK8, J2 is 26-pin plug DDK26.
[0019] Before the system in Figure 1 is powered on, set the state switch to the calibration position, and preset the line number of the photoelectric code disc and the mechanical zero point. After the system is powered on, first check the parameter values in the LCD liquid crystal display interface, and adjust t...
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The invention provides a photoelectric encoder mode conversion device, relating to the improvement of a photoelectric encoder, which is characterized in that: an encoder is accessed in a signal buffer unit; a signal unit output end is connected with an input end of a phase discriminator; an output signal end is accessed in a reversible counter and in a singlechip data bus; a control end of the reversible counter is connected with a control end of the singlechip; a signal output end of the phase discriminator and an output signal end of the reversible counter are connected with a long line drive unit; an output end of the long line drive unit is connected with a signal output end of the photoelectric encoder mode conversion device; an output end of the singlechip is connected with a memoryand a display; a correction driveplate is connected with an input port of the singlechip; a code disc driveplate is connected with an input port of the singlechip 77E58. The invention has the beneficial effect of realizing functions of recording and tracing position information of absolute photoelectric encoder. In addition, the position information is never lost when the system is in power failure while the absolute photoelectric encoder does not have the function, and the transmission distance is improved.
Description
technical field [0001] The invention belongs to the field of optical-mechanical-electrical integration systems and relates to an improvement of a photoelectric encoder. Background technique [0002] Photoelectric encoder is a sensor that converts the mechanical geometric displacement on the output shaft into pulse or digital quantity through photoelectric conversion. It is currently the most widely used sensor for angle measurement. Photoelectric encoders at home and abroad are divided into incremental photoelectric encoders, absolute photoelectric encoders and hybrid absolute encoders. The incremental photoelectric encoder has a high angular resolution, up to 36,000 lines. After the power is cut off, the incremental photoelectric encoder will lose the position information. After the power of the absolute photoelectric encoder is cut off, the position information will not be lost, but the angular resolution is low, up to 1024 lines. The characteristics of the hybrid absolu...
Claims
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IPC IPC(8): G01D5/26
Inventor 赵继印盖爽郑蕊蕊
Owner DALIAN NATIONALITIES UNIVERSITY