Velocity measurement using phase orthogonal spatial filters

Author

Nomura, Masakatsu ; Hori, Michitaka ; Shimomura, Junichi ; Terashima, Masayuki

Author_Institution

Meidensha Corp., Tokyo, Japan

fYear

1992

fDate

4-9 Oct 1992

Firstpage

1756

Abstract

The authors developed a velocity measurement system based on a spatial filtering method. A charge coupled device (CCD) line sensor was used to detect the object pattern, and a DSP (TMS32025) performed the spatial filtering calculations. Because the selectivity of the spatial filter was fixed, the measurement accuracy of this approach is generally influenced by the condition of the object pattern. A method that improves the accuracy of the velocity measurement by using two pairs of spatial filters with phases orthogonal spatial weighing functions was developed. The new method of velocity measurement is described with some experimental results

Keywords

CCD image sensors; computerised instrumentation; digital signal processing chips; filters; velocity measurement; CCD; DSP; TMS32025; accuracy; charge coupled device; computerised instrumentation; line sensor; object pattern; phase orthogonal spatial filters; selectivity; velocity measurement; weighing functions; Charge coupled devices; Digital signal processing; Frequency estimation; Frequency measurement; Optical devices; Optical filters; Optical sensors; Optical signal processing; Spatial filters; Velocity measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Society Annual Meeting, 1992., Conference Record of the 1992 IEEE

Conference_Location

Houston, TX

Print_ISBN

0-7803-0635-X

Type

conf

DOI

10.1109/IAS.1992.244523

Filename

244523