Title:
SURVEY METHOD OF REFERENCE POINT UNDER WATER AND BUOY-TYPE REFERENCE POINT SURVEY DEVICE USED FOR THIS METHOD
Document Type and Number:
Japanese Patent JP3022643
Kind Code:
B2
Abstract:
PURPOSE: To obtain a survey method of a reference point under water with an improved accuracy of the reference point.
CONSTITUTION: A survey method of a reference point under water allows transponders 1, 2, and 3 which respond to ultrasonic wave to be sank at a specified position under water, a buoy 8 which can measure an absolute position of latitude and longitude and at the same time a distance to the transponder to be floated on the sea near the transponders 1, 2, and 3, and at the same time the buoy 8 to measure the absolute position at least two points on the sea. At the same time, the reference position under water of the transponders 1, 2, and 3 is surveyed by allowing the buoy 8 to measure a distance to the transponders 1, 2, and 3.
Inventors:
Hirokazu Iwasaki
Toyoki Sasakura
Toyoki Sasakura
Application Number:
JP22332791A
Publication Date:
March 21, 2000
Filing Date:
August 07, 1991
Export Citation:
Assignee:
FURUNO ELECTRIC COMPANY,LIMITED
International Classes:
G01C3/20; G01C15/00; G01S5/30; G01S15/08; G01S15/74; (IPC1-7): G01S5/30; G01C3/20; G01S15/08; G01S15/74
Domestic Patent References:
| JP6336179A | ||||
| JP6336174A | ||||
| JP4120489A | ||||
| JP63222279A | ||||
| JP59159078A | ||||
| JP54115266A |
Attorney, Agent or Firm:
Yoshiyuki Kaji