JPS649388A - Span measuring method of aerial transmission line - Google Patents

Span measuring method of aerial transmission line

Info

Publication number
JPS649388A
JPS649388A JP16467487A JP16467487A JPS649388A JP S649388 A JPS649388 A JP S649388A JP 16467487 A JP16467487 A JP 16467487A JP 16467487 A JP16467487 A JP 16467487A JP S649388 A JPS649388 A JP S649388A
Authority
JP
Japan
Prior art keywords
electromagnetic wave
measuring
emitting
receiving device
wave emitting
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
JP16467487A
Other languages
Japanese (ja)
Inventor
Masahiro Terunuma
Masao Hanawa
Akira Takahata
Takashi Kawamura
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.)
TAKAHAGI ENG KK
Hitachi Cable Ltd
Original Assignee
TAKAHAGI ENG KK
Hitachi Cable 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 TAKAHAGI ENG KK, Hitachi Cable Ltd filed Critical TAKAHAGI ENG KK
Priority to JP16467487A priority Critical patent/JPS649388A/en
Publication of JPS649388A publication Critical patent/JPS649388A/en
Pending legal-status Critical Current

Links

Landscapes

  • Electric Cable Installation (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

PURPOSE:To easily enable location selection for measuring without need for manually carrying measuring apparatuses and the like and realized aerial span measuring method capable of ensuring measuring accuracy by emitting an electromagnetic wave from an electromagnetic wave emitting and receiving device provided on a reference point and reflecting it by a reflector provided on a measuring origin on a steel tower. CONSTITUTION:For example, an electromagnetic wave emitting and receiving device 1 is loaded on a helicopter. On the other hand, reflectors 2 and 3 are provided on origins P and Q on steel towers S1 and S2. Light waves emitted from the electromagnetic wave emitting and receiving device 1 are reflected by the reflectors 2 and 3, and returning waves are received by a receiver. At this time distances l1 and l2 are obtained in accordance with the times of electromagnetic wave emitting to receiving respectively. And an emitting angle of two electromagnetic waves emitted to the reflectors 2 and 3 from the electromagnetic wave emitting and receiving device 1 can exactly be measured. Thus, the distance L between the origins P, Q can be calculated from the distances l1 and l2 and the measuring angle thereof.
JP16467487A 1987-07-01 1987-07-01 Span measuring method of aerial transmission line Pending JPS649388A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16467487A JPS649388A (en) 1987-07-01 1987-07-01 Span measuring method of aerial transmission line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16467487A JPS649388A (en) 1987-07-01 1987-07-01 Span measuring method of aerial transmission line

Publications (1)

Publication Number Publication Date
JPS649388A true JPS649388A (en) 1989-01-12

Family

ID=15797683

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16467487A Pending JPS649388A (en) 1987-07-01 1987-07-01 Span measuring method of aerial transmission line

Country Status (1)

Country Link
JP (1) JPS649388A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5362340A (en) * 1993-03-26 1994-11-08 Aluminum Company Of America Method of producing aluminum can sheet having low earing characteristics
US5362341A (en) * 1993-01-13 1994-11-08 Aluminum Company Of America Method of producing aluminum can sheet having high strength and low earing characteristics

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5362341A (en) * 1993-01-13 1994-11-08 Aluminum Company Of America Method of producing aluminum can sheet having high strength and low earing characteristics
US5362340A (en) * 1993-03-26 1994-11-08 Aluminum Company Of America Method of producing aluminum can sheet having low earing characteristics

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