Burst spectrum analyzer for two-dimensional Doppler signals

Yutaka Fukuoka, Eiji Okada, Haruyuki Minamitani

    Research output: Contribution to journalArticle

    Abstract

    A new signal processing system for a two-dimensional laser Doppler velocimetry (2-DLDV) is proposed. The system consists of the burst spectrum analyzer (BSA) proposed by L. Lading and it allows carrying out simultaneous processing of 2-DLDV signals which conventionally require two signal processors. The BSA makes possible measurement for a case with a low SN ratio or of a flow with a violent velocity variation, and is extremely effective in LDV measurement. Since the BSA makes use of FFT, it is possible to process signals with two frequency peaks. This characteristic is recognized and the concept of one signal input and one frequency output in the conventional LDV signal processor is relinquished. A new method is conceived for processing the signals in the two-dimensional LDV processed with one BSA. The velocity measurement of a rotating acrylic disk is performed and the effectiveness of the method is demonstrated.

    Original languageEnglish
    Pages (from-to)60-66
    Number of pages7
    JournalElectronics and Communications in Japan, Part II: Electronics (English translation of Denshi Tsushin Gakkai Ronbunshi)
    Volume73
    Issue number2
    Publication statusPublished - 1990 Feb 1

    ASJC Scopus subject areas

    • Physics and Astronomy(all)
    • Computer Networks and Communications
    • Electrical and Electronic Engineering

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