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Development of a new displacement-measuring ultrasonic sensor based on astigmatic focus error detection

Research Project

Project/Area Number 08555039
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section展開研究
Research Field 機械工作・生産工学
Research InstitutionKEIO UNIVERSITY

Principal Investigator

MITSUI Kimiyuki  Keio University, Faculty of Science and Technology, Professor, 理工学部, 教授 (90219668)

Co-Investigator(Kenkyū-buntansha) TSUKAMOTO Hidehiko  Mitsubishi Heavy Industries, LTD.Hiroshima Laboratory, Vice General Manager, 技術本部・広島研究所, 次長
塚本 頴彦  三菱重工業(株), 技術本部・広島研究所, 次長(研究職)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥10,000,000 (Direct Cost: ¥10,000,000)
Fiscal Year 1997: ¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1996: ¥7,000,000 (Direct Cost: ¥7,000,000)
Keywordsultrasonic wave / astigmatism / astigmatic focus error detection / non-contact measurement / displacement measurement / in-process measurement
Research Abstract

In-process measurement is generally considered to be the most functional method for obtaining high-dimensional accuracy during cutting and grinding operations, with contact type sizing devices being commonly used when such accuracy is required. Optical techniques are not suitable for use in these operations due to wet conditions arising from lubricant application.
In contrast, corresponding ultrasonic techniques can be effectively applied when fully immersed in a liquid, though another problem occurs regarding measurement accuracy of conventional ultrasonic displacement sensors which employ the pulse-echo method. The resolution is, typically, 2-20mum, which is not adequate to meet desired in-process measurement standards.
This drawback in measurement resolution led us to develop an entirely new type of ultrasonic displacement measurement method, i.e., we built the first-ever displacement-measuring ultrasonicsensor whose operation is based on the principle of astigmatic focus error detection. Basically, the sensor incorporates a cylindrical acoustic lens that detects a change in distance between an acoustic objective lens and target surface converting it to an equivalent change in sound pressure distribution which is measured by a quadrant type ultrasonic detector. Here, we describe in detail the measuring principle of this new method and the basic analysis applied in the design method, after which results of experimental evaluations are presented demonstrating method/system suitability to meet its intended application as an in-process measurement device possessing high-dimensional accuracy during cutting or grinding operations.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (5 results)

All Other

All Publications (5 results)

  • [Publications] 三井 公之 ほか: "Development of a new displacement-measuring ultrasonic sensor based on astigmatic focus error detection-measuring principle and its demonstration" Precision Engineering. 20-2. 93-98 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Mitsui, Makoto Koike, Hidehiko Tsukamoto and Minoru Yajima: "Development of a new displacement-measuring ultrasonic sensor based on astigmatic focus error detection -measuring principle and its demonstration-" Precision Engineering. Vol.20, No.2. 93-98 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 三井公之ほか: "Development of a new displacement-measuring ultrasonic sensor based on astigmatic focus error detection-measuring principle and its demonstration" Precision Engineering. 20-2. 93-98 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 小池、三井、八島、塚本: "非点収差方式による超音波変位計測法に関する研究" 日本機械学会論文集(C編). 61-584. 464-469 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] K.Mitsui,A.Tsukamoto: "A New Ultrasonic Sensor for Displacement Measurement" Precision Engineering. (掲載決定).

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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