TEST ON TRAIN PASSAGE DETECTORS UTILIZING RADIO-ISOTOPES
A train detector utilizing radio-isotopes was tentatively manufactured and tested on the Shimogawara-line during the period from February to March in 1963. Since the train speed on the line was below 60 km/h and the test period was too short, further tests were carried out in order to confirm its ability under more practical conditions. A type of ground spot detector, composed of a Radio-Isotope 137 Cs of 25 mCi (milli-curie) laid inside a track, and a stainless steel cathode halogen Geiger tube of 40 mm phi time 400 mm in length fixed on the floor of a car was perfectly operated even when the car passed over the isotope at a speed of 200 km/h. Another type with the isotope 60 Co of 100 alpha Gi (micro-curie) laid inside a track, and with a scintillation radiation detector fixed beneath the floor of a car, was also operated satisfactory at a speed of 200 km/h. As for the train detector of gamma-reflection type, in which both of the isotope 137 Cs of 25 mCi and a Geiger tube are laid inside a track, its performance was good both on narrow gauge lines and on the new Tokaido line. In its life test for a long period, it could detect train passages of about 14,000 times without even one miss or over-counting.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/oclc/3127232
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Corporate Authors:
JAPANESE NATIONAL RAILWAYS
TOKYO, Japan -
Authors:
- Kobayashi, A
- Nakaya, R
- Publication Date: 1967-6
Media Info
- Pagination: p. 112-114
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Serial:
- Railway Technical Research Institute, Quarterly Reports
- Volume: 8
- Issue Number: 2
- Publisher: Railway Technical Research Institute/Tetsudo Gijutsu Kenkyujo
- ISSN: 0033-9008
- Serial URL: http://www.rtri.or.jp/eng/
Subject/Index Terms
- TRT Terms: Automatic train location; Detectors; Equipment design; Railroad trains; Technology
- Geographic Terms: Japan
- Subject Areas: Design; Railroads; Vehicles and Equipment;
Filing Info
- Accession Number: 00033157
- Record Type: Publication
- Report/Paper Numbers: Quart Rpt
- Files: TRIS
- Created Date: Jun 16 1973 12:00AM