JPS5544928A - Method of detecting position of moving article in tube - Google Patents

Method of detecting position of moving article in tube

Info

Publication number
JPS5544928A
JPS5544928A JP11800678A JP11800678A JPS5544928A JP S5544928 A JPS5544928 A JP S5544928A JP 11800678 A JP11800678 A JP 11800678A JP 11800678 A JP11800678 A JP 11800678A JP S5544928 A JPS5544928 A JP S5544928A
Authority
JP
Japan
Prior art keywords
tube
electromagnetic wave
article
frequency
measuring instrument
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11800678A
Other languages
Japanese (ja)
Inventor
Akiyoshi Kawada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Mining and Cement Co Ltd
Original Assignee
Mitsubishi Mining and Cement Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Mining and Cement Co Ltd filed Critical Mitsubishi Mining and Cement Co Ltd
Priority to JP11800678A priority Critical patent/JPS5544928A/en
Publication of JPS5544928A publication Critical patent/JPS5544928A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

PURPOSE: To safely and precisely detect the position of a moving article by providing an electromagnetic wave generator at the article and detecting the electromagnetic wave thus generated by a measuring instrument disposed out of the tube.
CONSTITUTION: A radio wave plug 9 containing an electronic buzzer, a dry battery and a snap switch is disposed at the center of a tube 12. The sensor of a measuring instrument amplifies a signal received at its coil 10 by a low frequency amplfier 13, and an indicator 14 such as an infinitesimal voltmeter, recorder or oscillograph, etc. or a receiver observes the signal. The electronic buzzer used as the electromagnetic wave generator employs audible frequency such as 400W5,000Hz since low electromagnetic wave frequency is preferable due to the attenuating characteristics of the electromagnetic wave in the tube. The sensing coil 10 is moved along the tube to cause the signal waveform to be varied to thereby detect the position of the article in the tube.
COPYRIGHT: (C)1980,JPO&Japio
JP11800678A 1978-09-27 1978-09-27 Method of detecting position of moving article in tube Pending JPS5544928A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11800678A JPS5544928A (en) 1978-09-27 1978-09-27 Method of detecting position of moving article in tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11800678A JPS5544928A (en) 1978-09-27 1978-09-27 Method of detecting position of moving article in tube

Publications (1)

Publication Number Publication Date
JPS5544928A true JPS5544928A (en) 1980-03-29

Family

ID=14725709

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11800678A Pending JPS5544928A (en) 1978-09-27 1978-09-27 Method of detecting position of moving article in tube

Country Status (1)

Country Link
JP (1) JPS5544928A (en)

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