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Absolute type azimuth photoelectric encoder

A technology of photoelectric encoder and azimuth angle, which is applied in the direction of instruments, conversion sensor output, measuring devices, etc., can solve the problems of poor impact resistance, large error and even code error of metal code disc, so as to reduce production difficulty and increase rigidity Strength, the effect of simplifying the mechanical structure

Inactive Publication Date: 2016-12-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The invention aims to solve the problem that the hollowed-out coding area on the metal disk of the traditional photoelectric encoder will cause the metal code disk to be deformed due to insufficient rigidity, resulting in large errors or even code errors. The problem of poor impact resistance, the present invention provides an absolute azimuth photoelectric encoder

Method used

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  • Absolute type azimuth photoelectric encoder
  • Absolute type azimuth photoelectric encoder

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Experimental program
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specific Embodiment approach 1

[0056] Specific implementation mode one: see figure 2 Describe this embodiment. An absolute azimuth photoelectric encoder described in this embodiment includes a processing circuit 1, a light emitting tube 2, a photodiode 3, a main shaft 4, and an absolute encoder disc. The feature is that the absolute encoder disc includes a narrow The slit disc 5 and the metal code disc 6, and the slit disc 5 and the metal code disc 6 have the same size, and the code word area of ​​the metal code disc 6 is in the form of a depression or blackening,

[0057] The slit disc 5 and the metal code disc 6 are installed in parallel on the main shaft 4, there is an axial working gap between the slit disc 5 and the metal code disc 6, the metal code disc 6 follows the rotation of the main shaft 4, and the slit disc 5 remains stationary.

[0058] The processing circuit 1 is used to provide electric energy to the luminous tube 2, and the light emitted by the luminous tube 2 passes through the slit on th...

specific Embodiment approach 2

[0063] Specific implementation mode two: see image 3 and 4 Describe this embodiment. The difference between this embodiment and the azimuth photoelectric encoder described in the first embodiment is that the metal code disc 6 is an azimuth code disc, and the slit disc 5 is an azimuth slit. sewing plate;

[0064] On the azimuth code disc, there are three circles of code tracks from the inside to the outside, which are successively the first circle of metal code tracks 6-1, the second circle of metal code tracks 6-2 and the third circle of metal code tracks 6-3, and Set the metal code wheel 6 to take the geographic south direction as 0°, and the angle θ gradually increases to 360° in the clockwise direction,

[0065] The first round of metal track 6-1:

[0066] In the areas of 0°<θ<135° and 315°<θ≤360°, all are areas without codewords;

[0067] In the area of ​​135°≤θ≤315°, all are areas with codewords;

[0068] The second round of metal track 6-2:

[0069] In the area of...

specific Embodiment approach 3

[0082] Specific implementation mode three: see image 3 and 4 Describe this embodiment, the difference between this embodiment and the azimuth photoelectric encoder described in the second embodiment is that the metal code track 6-2 in the second circle and the metal code track 6 in the third circle The 0° position between -3 is provided with a check code bit, and the check code bit is an area with a code word, and the check code bit is used for checking and correcting the initial position of the metal code disc 6 .

[0083] In this embodiment, a check code bit is provided at the 0° position between the second circle of metal code track 6-2 and the third circle of metal code track 6-3, and the check code bit is a code word area, the verification code bit is used as the inspection and correction of the initial position of the metal code disc 6, and under the joint action of the three-circle code track, the azimuth encoder can read the angle code word result that meets the accu...

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Abstract

Provided is an absolute type azimuth photoelectric encoder, relating to the field of solar tracking, angle control sensors, angle measurement, and absolute encoders and solving the problems that the hollow encoding area on the metal disc of a conventional photoelectric encoder results in the deformation of a metal code disc due to insufficient rigidity, and further results in large errors, even error codes, and moreover, due to the hollow structure, the metal code disc is poor in impact resistance. The absolute encoding disc includes a metal code disc and a slot disc, the codeword area of the metal code disc is in the form of recessing or blackening, and the codeword area is a non-reflection area, and the codeword-free area is a reflection area. When the three circles of code tracks of the metal code disc are respectively matched with the three circles of slits of the slot disc, and along with the rotation of the metal code disc, when the three circles of slits meet the non-reflection area of the corresponding code track on the code disc, the high-level state is shown, and a signal is output, and when the three circles of slits meet the reflection area of the corresponding code track on the code disc, the low-level state is shown, and no signal is output. The absolute type azimuth photoelectric encoder is used for azimuth measurement.

Description

technical field [0001] The invention relates to the fields of solar tracking, angle control sensors, angle measurement and absolute encoders. Background technique [0002] In today's era of rapid technological development, people's demand for energy has never stopped and intensified. Facing the depletion of major chemical energy sources, the development and use of new energy sources is a major theme that mankind must face in the future. A series of new energy sources such as solar energy, geothermal energy, wind energy, and nuclear fusion energy have become important energy sources for continuous in-depth research, development and utilization in the field of scientific research. Solar energy is the source of many energy sources on the earth, and it can even be called the "source of all things" on the earth. Therefore, how to better research and develop solar energy is an important topic in the field of human scientific research. At present, the main way for people to colle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/347
CPCG01D5/3473
Inventor 王振永耿驰李德志孔德阳
Owner HARBIN INST OF TECH
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