JPH1183479A - Depth measuring system using gps and cad - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a depth measuring system which measures the underwater ground shape accurately in real time. SOLUTION: A stationary station 1 is equipped with a stationary GPS receiver 4 connected with a stationary GPS antenna 3 in known position and a transferring GPS signal transmitter/receiver 5 connected with a stationary GPS receiver 4. A measuring ship 2 is equipped on board with a mobile GPS antenna 8 and automatic depth sounder 11 with positions aligned to the perpendicular direction, a mobile GPS receiver 9 connected with the mobile GPS antennas 8, a transferring GPS signal receiver/transmitter 10 connected with the mobile GPS receiver 9, a data transmitter/receiver 14 connected with the automatic depth sounder 11 and mobile GPS receiver 9, and a synchronizing device 12 whereby the position measuring of the mobile antenna 8 performed by the GPS relative position measuring method through cooperative use of the stationary GPS antenna 3 and mobile antenna 8 is synchronized with the depth measuring using the automatic depth sounder 11. A CAD personal computer 7 is coupled directly or indirectly with the data transmitter/receiver 14, and the position of the mobile antenna 8 and the depth in this position acquired in synchronized measurement are plotted on the depth chart.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bathymetric system using GPS and CAD, and more particularly to a fixed GPS antenna at a known position and a mobile GPS antenna provided on a surveying ship in vertical alignment with an automatic sounding device. The present invention relates to an apparatus used for drawing a depth of each survey position as a shallow map by a CAD apparatus. Here, GPS stands for Global Positioning Sy
CAD) and CAD is Computer Aided Design (Computer A
ided Design).

[0002]

2. Description of the Related Art In a simple method of bathymetric surveying of the seabed topography, a lead weight is attached to the tip of a graduated rope and thrown into water, and the depth of the rope is extended by the length of the rope pulled out until the weight reaches the seabed. A reading method was used. In this method, it is necessary to stop the boat every time the water depth is measured, and it takes a long time for one depth measurement. In order to solve this problem, an acoustic sounding device that obtains the water depth from the round trip time of a sound pulse to the sea floor has been used.

[0003] Although the acoustic automatic sounding device can accurately measure the water depth, there is a problem with the position of the measured sound.

[0004]

When a surveying ship is used, for example, a method of measuring the position of the ship at approximately constant time intervals, determining the direction of travel based on the position of the ship, and appropriately measuring the depth while operating the surveying ship. Alternatively, a method may be adopted in which a surveying vessel is guided on a line or radiation by a transceiver using a lightwave positioning device installed on land and the sounding is appropriately measured. In these methods using a survey ship, it is difficult to accurately match the water depth with the ship position, and calculating the seafloor topography from the water depth and the ship position has to be post-processed.

[0005] In addition, the bathymetric survey by surveying a surveying ship with a lightwave positioning device has the following problems. (1) Skill is required in handling and installing surveying equipment. (2) It is easy to be influenced by the weather, and it is necessary to see the survey ship from the lightwave positioning device. (3) Since the understanding of the seafloor topography is post-processing, for example, when the seafloor changes every day, such as in landfill construction,
It is necessary to consider the external factors such as accurate grasp of the progress of the landfill work and prompt response to the planning aspect. Without such consideration, it will be difficult to obtain accurate survey results. (4) It is necessary to arrange skilled personnel to guide the boat on land.

Accordingly, it is an object of the present invention to provide a bathymetric surveying system capable of grasping the water bottom topography with high accuracy in real time.

[0007]

DETAILED DESCRIPTION OF THE INVENTION Referring to FIG. 1, a bathymetry system using GPS and CAD according to the present invention includes a fixed GPS receiver 4 connected to a fixed GPS antenna 3 at a known position.
A fixed station 1 having a transfer GPS signal receiver / transmitter 5 connected to a GPS receiver 4; a mobile GPS antenna 8 and an automatic sounding device 11 vertically aligned; a mobile GPS receiver 9 connected to the mobile GPS antenna 8; Transmitted GPS signal receiver / transmitter 10 connected to mobile GPS receiver 9, data transmitter / receiver 14 connected to automatic sounding device 11 and mobile GPS receiver 9, and GPS using fixed GPS antenna 3 and mobile GPS antenna 8. Surveying vessel 2 having a synchronizing device 12 for synchronizing position measurement of mobile GPS antenna 8 by relative positioning and bathymetry by automatic sounding device 11; and synchronized mobile GPS coupled to data transmitter / receiver 14.
It is provided with a CAD device that draws a depth at a position determined by position measurement and depth measurement of the antenna 8 in a depth map.

Preferably, the fixed station 1 transmits the transmitted GPS signal /
The receiver 5 is a transfer GPS signal transmitter and the transfer G of the survey ship 2
The PS signal receiver / transmitter 10 is a transfer GPS signal receiver, the data transmitter / receiver 14 of the survey vessel 2 is a data transmitter, and the fixed station 1
A data receiver 6 and a CAD personal computer 7 for receiving data from a data transmitter are provided, and a depth map is drawn based on the reception from the data transmitter 14 using the CAD personal computer 7 as a CAD device.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The operation will be described with reference to FIG.
In the illustrated example, a fixed GPS antenna 3 is provided at a known position on the ground to serve as a fixed station 1, and a survey vessel 2 floating in the sea 20 is used as a mobile station for a GP.
Use S relative positioning. The GPS signal received by the fixed GPS receiver 4 is transmitted to the survey ship as the transfer GPS signal transmitter / receiver 5 connected to the fixed GPS receiver 4 of the fixed station 1 as a transfer GPS signal transmitter. In surveying vessel 2, transfer GPS signal receiver / transmitter 10
As a signal receiver, it receives the transfer of the GPS signal received by the fixed GPS receiver 4 and adds it to the mobile GPS receiver 9. The mobile GPS receiver 9 calculates the difference between the GPS signal received by the mobile GPS antenna 8 and the received GPS signal received by the fixed GPS receiver 4.
The position of the mobile GPS antenna 8 is measured by a known GPS relative positioning method. According to the present invention, this mobile GPS antenna 8
The surveying operation and the bathymetric surveying operation by the automatic sounding device 11 are synchronized by the synchronizing device 12, and the mobile GPS antenna 8 and the automatic sounding device 11 are vertically aligned. The GPS receiver 9 outputs the measured water depth at the position of the mobile GPS antenna 8. Accordingly, the measured position information of the mobile GPS antenna 8 and the water depth information at that position are added to the data transmitter / receiver 14.

The automatic sounding device 11 is, for example, an acoustic sounding device. However, the present invention is not limited to the acoustic sounding device, and any other sounding device using a laser beam can be used.

In the illustrated example, the data transmitter / receiver 14 of the survey ship 2
Is a data transmitter, and the fixed station 1 is provided with a data receiver 6 and a CAD personal computer 7 for receiving data from the data transmitter. This C
The AD personal computer 7 moves from the data transmitter 14 of the survey
Since the position information of the S antenna 8 and the water depth information at that position can be obtained, a depth diagram can be drawn, for example, as shown in FIG. In addition, since both the position measurement by the GPS relative positioning method and the bathymetry by the automatic sounding device 11 which is an acoustic automatic sounding device are completed within a fraction of a second, the creation of the depth map by the CAD method of the CAD personal computer 7 is not possible. , According to the movement of the survey boat 2.

Accordingly, an object of the present invention is to provide a bathymetry system capable of grasping the water bottom topography with high accuracy in real time.
Is achieved.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment shown in FIG. 1, a monitoring personal computer 13 is provided on a survey vessel 2 and connected to a data transmitter / receiver 14. The mobile G calculated by the mobile GPS receiver 9 as described above
If the position of the PS antenna 8 is displayed on the monitoring personal computer 13 as shown in FIG. 2, for example, and the monitoring personal computer 13 is installed in an easily visible position in the cab, the operator of the surveying ship 2 can display the position of the ship. It is possible to operate all over the range to be surveyed while watching The ship position and the water depth at each ship position displayed in this manner are sent to the fixed station 1 by the data transmitter / receiver 14, and are plotted as a shallow map by the CAD computer 7 of the station.

When the fixed station 1 is a construction office or the like,
Various necessary data can be calculated online using the display of the CAD personal computer 7 and its functions. For example, in a landfill construction, the landfill quantity, the rate of change in soil volume, and the like can be calculated quickly.
Further, an administrator at the fixed station 1 can remotely guide the survey ship 2 by radio so that data necessary for completing a shallow map can be obtained.

The installation position of the CAD personal computer 7 is not limited to the fixed station 1, but may be replaced with or in addition to the fixed station 1.
Can also be installed on top. Also, a personal computer for monitoring on the survey ship 2
It is also possible to add a CAD function to 13. Similarly, the position display function of the survey ship 2 can be added to the CAD personal computer 7 of the fixed station 1.

The position measurement of the mobile GPS antenna 8 synchronized with the sounding of the automatic sounding device 11 can be performed in the fixed station 1. Transfer GPS signal receiver / transmitter 10 of survey ship 2 GPS
The transmission GPS signal transmitter / receiver 5 of the fixed station 1 is used as the transmission GPS signal receiver. Synchronize bathymetry with 11. In the fixed GPS receiver 4 of the fixed station 1, the reception GP with the fixed GPS antenna 3
Transfer G transmitted in synchronization with S signal and bathymetric survey of survey vessel 2
Based on the PS signal, the position of the mobile GPS antenna 8 at the time of synchronized bathymetry can be measured. In this case, the data transmitter / receiver 14 of the survey ship 1 is a data transmitter, and the fixed station 1 has a data receiver 6 and a CA which are received from the data transmitter.
The D personal computer 7 is provided, and the CAD personal computer 7 can draw a depth map based on the reception from the data transmitter 14 and the measurement of the mobile GPS antenna position 8 in the fixed GPS receiver 4 of the fixed station 1.

[0017]

As described above, the GPS and CAD according to the present invention are used.
The bathymetric system used is equipped with a fixed GPS antenna at a known position, a mobile GPS antenna and an automatic sounding device that are vertically aligned on the survey ship, and the position measurement of the mobile antenna by the GPS relative positioning method and the automatic sounding device. The following remarkable effects can be obtained by synchronizing with the bathymetry.

(A) Since the surveying covering the surveying range can be automatically performed with the operation of the surveying ship, there is no need for personnel having specialized knowledge on the surveying. (b) Since the GPS positioning method is used to measure the position of the ship, it is possible to measure without being affected by the weather. (c) The surveying manager can check the topography of the water bottom and its change status on the CAD display during the surveying work, and since the CAD screen can be used as a control chart when the surveying work is completed, quick survey work management and surveying can be performed. Result management is possible. (d) The surveying work itself can be done by one person. (e) Since the progress of the survey can be grasped in real time,
Surveying can be performed without missing the surveying range.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing the configuration of an embodiment of the present invention.

FIG. 2 is an example of a diagram showing a position of a survey ship.

FIG. 3 is an example of a bathymetric diagram showing a result of bathymetric survey.

[Explanation of symbols]

 1 Fixed Station 2 Survey Ship 3 Fixed GPS Antenna 4 Fixed GPS Receiver 5 Transferred GPS Signal Transmitter / Receiver 6 Data Transmitter / Receiver 7 CAD Computer 8 Mobile GPS Antenna 9 Mobile GPS Receiver 10 ... Transfer GPS signal receiver / transmitter 11 ... Automatic sounder 12 ... Synchronizer 13 ... Monitoring computer 14 ... Data transmitter / receiver 20 ... Sea

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Tadashi Yamamoto 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Tsutomu Hayasaki 1-2-7 Moto-Akasaka, Minato-ku, Tokyo No.Kashima Construction Co., Ltd.

Claims (5)

[Claims] 1. A fixed station having a fixed GPS receiver connected to a fixed GPS antenna at a known position and a transfer GPS signal transmitter / receiver connected to the fixed GPS receiver; a mobile GPS antenna vertically aligned; An auto sounder, a mobile GPS receiver connected to the mobile GPS antenna, a transfer GPS signal receiver / transmitter connected to the mobile GPS receiver, the automatic sounder and mobile GPS
A data transmitter / receiver connected to a receiver, and the fixed GP
A surveying vessel having a synchronizing device for synchronizing the position measurement of the mobile GPS antenna by the GPS relative positioning method using the S antenna and the mobile GPS antenna together with the bathymetric survey by the automatic sounding device; and coupled to the data transmitter / receiver, Synchronized moves
GPS equipped with a CAD device that draws a depth map at a position determined by GPS antenna position measurement and bathymetry
And a bathymetry system using CAD. 2. The surveying system according to claim 1, wherein the transmission GPS signal transmitter / receiver of the fixed station is a transmission GPS signal transmitter, and the transmission GPS signal receiver / transmitter of the survey ship is a transmission GPS signal receiver. A data transmitter / receiver of the survey ship is a data transmitter, and the fixed station is provided with a data receiver and a CAD personal computer for receiving data from the data transmitter, and the CAD personal computer is used as the CAD device to receive data from the data transmitter. A bathymetric survey system that uses GPS and CAD to draw the bathymetric map based on the above. 3. The surveying system according to claim 1, wherein the transmission GPS signal transmitter / receiver of said fixed station is a transmission GPS signal transmitter, and said transmission GPS signal receiver / transmitter of said survey ship is a transmission GPS signal receiver. Connected to the surveying vessel to a data transmitter / receiver
A GPS and CAD-based bathymetric survey system in which a CAD PC is provided and the CAD PC is used as the CAD device to draw the bathymetric map. 4. The surveying system according to claim 1, wherein the transmission GPS signal receiver / transmitter of the survey ship is a transmission GPS signal transmitter, and the transmission GPS signal transmitter / receiver of the fixed station is a transmission GPS signal receiver. Synchronize the transmission of the transmission GPS signal by the transmission GPS signal transmitter and the bathymetry by the automatic sounding device by using the synchronization device of the survey ship, and the fixed GPS receiver of the fixed station in the fixed GPS receiver. Based on the received GPS signal and the transmitted GPS signal transmitted in synchronization with the bathymetry of the survey vessel, the position of the mobile GPS antenna at the time of the synchronized bathymetry is measured, and the data transmitter / receiver of the survey vessel is used. As a data transmitter, the fixed station is provided with a data receiver and a CAD personal computer to receive from the data transmitter, and the CAD personal computer is
A bathymetry system using GPS and CAD which draws the bathymetric map based on reception from the data transmitter as a CAD device and measurement of the position of a mobile GPS antenna at the fixed GPS receiver at the fixed station. 5. The surveying system according to claim 1, wherein the data sending / receiving device of the survey ship is a data transmitting / receiving device capable of transmitting data to a fixed station and receiving data from the fixed station. A bathymetric survey system using GPS and CAD, in which a monitoring PC is connected to the surveying vessel's data transceiver and the position of the surveying vessel is displayed on the monitoring PC.