JPS649388A - Span measuring method of aerial transmission line - Google Patents
Span measuring method of aerial transmission lineInfo
- 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
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.
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)
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 |
-
1987
- 1987-07-01 JP JP16467487A patent/JPS649388A/en active Pending
Cited By (2)
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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