ccd code cylinder angle sensor

Abstract

The invention relates to a CCD code drum type angle sensor which solves the technology problem which occurs when a code drum type two-dimensional hierarchical coding bar code ruler is utilized to perform angle measurement instead of code disc scales, and belongs to the technical field of measuring meters. The CCD code drum type angle sensor is characterized in that the code drum type bar code ruler arranged on the inner side of a code drum equally divides the periphery of the code drum into n code word areas, every code word area is composed of a code head and a code tail, the code heads are encoded with TDAB codes and are sequentially arranged from bottom to top, the code tails are rectangular areas above the code heads, diagonals are made in the rectangular areas from bottom to top, and intersection points of a CCD focal line and the diagonals are utilized to perform fine measurement of angles of the code word areas. The CCD code drum type angle sensor is characterized in that a hierarchical coding bar code ruler (ZL201110432176.0) encoding technology is used, and the two-dimensional hierarchical coding bar code ruler is further formed so as to adapt to the requirements of consistency of the CCD device code reading direction and the turn angle direction. The CCD code drum type angle sensor has the advantages that data processing is simple, an actually measured turn angle can be obtained by reading a code once, and measurement precision is high.

Description

technical field [0001] The invention relates to an angle sensor, in particular to a photoelectric CCD code cylinder type angle sensor, which belongs to the technical field of industrial automation measuring instruments. Background technique [0002] Angle sensor is an important sensor in the fields of instrument measurement, industrial automation, aviation and navigation. In the measurement and control system, angle sensors are often used to collect various angle parameters or to measure the speed of the rotating mechanism. In the flight attitude control system, precise angle measurement is the key technology and equipment for obtaining high-precision positioning. There are various measurement principles of angle sensors, commonly used are potentiometer type, photoelectric code disc type, grating type, etc. The potentiometer structure is simple, but the contacts are easy to wear and the resolution is not high. The code disc type and grating type have high precision and re...

AI Technical Summary

Problems solved by technology

The design of the code disc is difficult to manufacture, and it is difficult to give full play to the characteristics of large amount of information and high precision measured by the linear CCD device on the line

Because the CCD device is long, although the grooves are arranged on the edge of the code disc, the code disc is also large, and the designed sensor is relatively large. CCD code disc angle sensor is difficult to give full play to the strengths of CCD code reading

[0004] The Chinese invention patent (Patent No. 201110432176.0) titled "Grade-coded barcode ruler" discloses a DAB-coded graded-coded barcode ruler, which can achieve large-scale leveling with fewer code element combinations and has low barcode density. It creates good conditions for long-distance measurement of barcode positioning, but when this new technology is applied to the code disc angle sensor, the long bar code scale and long CCD device are not compatible with the code disc angle sensor. compatible

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