A 3.2 kHz, 13-bit Optical Absolute Rotary Encoder with a CMOS Profile Sensor

Author

Sugiyama, Yukinobu ; Ihori, Atsushi ; Abe, Tetsuya ; Takabe, Minori ; Mizuno, Seiichiro ; Matsui, Yoshinori ; Toyoda, Haruyoshi ; Mukozaka, Naohisa

Author_Institution

Hamamatsu Photonics K. K., Hamamatsu

fYear

2007

fDate

28-31 Oct. 2007

Firstpage

671

Lastpage

674

Abstract

We have developed a 3.2 kHz, 13-bit optical absolute rotary encoder system using a profile sensor and a slit disc. The profile sensor, which we have designed for this purpose, is a unique CMOS area image sensor aimed at highspeed position detection of X and Y-axes. The profile data of Y-axis from the profile sensor is used for recognition of an index code number of a slit disc and that of X-axis is used for position detection of the index code. This combination of both axes information enables to achieve high resolution even with less number of index codes (64 indexes) and small amount of digital calculations. Experimental results assure that this system can detect 13 bit angle resolution (0.044 degree) and the speed of detection reaches at maximum 3.2 kHz.

Keywords

CMOS image sensors; codes; image recognition; position measurement; CMOS profile sensor; bit angle resolution; frequency 3.2 kHz; high-speed position detection; image sensor; index code number recognition; optical absolute rotary encoder system; Automotive engineering; CMOS image sensors; Goniometers; High speed optical techniques; Image sensors; Motion detection; Optical sensors; Optoelectronic and photonic sensors; Photodiodes; Sensor systems;

fLanguage

English

Publisher

ieee

Conference_Titel

Sensors, 2007 IEEE

Conference_Location

Atlanta, GA

ISSN

1930-0395

Print_ISBN

978-1-4244-1261-7

Electronic_ISBN

1930-0395

Type

conf

DOI

10.1109/ICSENS.2007.4388488

Filename

4388488