JPH0426692B2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention is intended for the purpose of construction management in foundation mound construction work such as breakwaters and seawalls, dredging work, etc.
This relates to a bathymetric survey method for surveying the seabed surface, etc., and measuring the condition of the seabed construction surface, etc.

(Prior Art) For example, when constructing a foundation mound for a breakwater or the like, bathymetric surveying is performed for the purposes of preliminary investigation, grasping construction progress, completion inspection, and the like.

As one of the conventional bathymetric surveying methods, a bathymetric surveying method is carried out by sight-line positioning of a target as shown in FIGS. 11 and 12. In this surveying method, a surveying vessel 2 conducts a survey for an area 1 that is the subject of bathymetric surveying.
Survey line 3, which is a guide line in the navigation direction (X direction)
and a cut line 5 in the Y direction that is perpendicular to this survey line 3 and determines the cut point 4, which is the reference measurement point on the survey line 3. is determined in advance by placing a buoy (a buoy with a survey line flag 7 attached to a bamboo pole 6 and connected to an anchor 8, or a fixed marker (on land, a buoy with a survey line flag attached to a measured bamboo pole) 9 and 10, respectively, during the survey. A predetermined target 9 on the extension of the siding 3 is seen from the ship 2, and while the ship is sailing at a constant speed while strictly monitoring the deviation so as not to deviate from the survey line 3, the echo sounder 11 is used at regular intervals. The water depth to the seabed 12 is measured, and the water depth data is recorded on recording paper in correspondence with the measurement time. When the target object 10 is seen through and intersects with the cut line 5, a cut mark line is written on the recording line in correspondence with the measurement time. The cut lines on the recording paper recorded in this way are divided by the number of measurement points, and the water depth data at each divided point is read to create a table of positions and water depth values, which is used as survey data.

This type of bathymetric surveying method is often used when the survey area is relatively small and a high level of position measurement accuracy is not required, or when radio positioning methods cannot be used due to radio interference, facility costs, etc. has been done.

Other bathymetric surveying methods include automatic bathymetric surveying using radio positioning.

This surveying method involves installing a main station on a survey ship, installing slave stations at two or more reference points on land or at sea, measuring the distance from the main station on the sailing survey ship to each slave station, and calculating triangulation. This method determines the ship's position by

According to this method, positioning data and water depth data can be continuously and automatically recorded.

This type of bathymetry method combines a radio wave positioning device, a digital acoustic sounder, and a computer, and has the advantage of automatically performing everything from recording survey data to post-processing data editing and chart creation. be.

(Problem to be solved by the invention) However, in the former bathymetric survey method, the process from reading survey data such as position data and water depth data from recording paper to creating management materials must be performed manually. Therefore, there was a problem that the work was complicated and time-consuming.

On the other hand, with the latter bathymetric survey method, (a) the facility cost for the positioning method increases, (b) the types of radio waves that can be used are limited, and (c) there are obstacles between the main station and the slave station. There was a problem that radio interference occurred when the same frequency was used near the survey area, making positioning impossible.

An object of the present invention is to provide a bathymetric surveying method that can automatically record survey data and automatically create necessary charts without using expensive equipment such as radio wave positioning equipment.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a survey line for guiding the surveying vessel in the traveling direction of the area to be surveyed, and the survey line. A cut line that is perpendicular to the line and which determines the cut point, which is a reference measurement point on the survey line, is determined in advance by placing targets on the extension of these survey lines and the cut line, and Then, while sailing the survey ship, the depth of the water was sequentially measured at regular intervals from one cut point to the next, each having a known position, using a depth sounder, and this was repeated to determine the depth of the water at each point on each of the survey lines. In the bathymetric survey method for measuring water depth,
The survey line number of the survey line to be surveyed is input from the local survey command unit to the data registration unit, and the depth is measured at regular intervals with the depth sounder while the survey vessel is sailing on the survey line with the survey number. Then, the water depth data is divided into sections according to the survey line numbers and automatically stored in the data registration section, and the cut line numbers of the cut lines that meet sequentially are determined by the operation of the local survey command section when the cut lines meet. Each time, the data registration unit stores the water depth data at that time, performs such a survey for each survey line, and at the end of the survey, stores the water depth data collected for each survey line number at each position. The data is calculated by the arithmetic processing unit based on the distance between the cut lines and the number of times of surveying between the cut lines, and is automatically stored in the data registration unit, and then the data of the position is sent from the data registration unit. At the same time, the water depth data at that position is read out along with the survey line number and a necessary chart is automatically created.

(Function) As described above, according to the present invention, automatic recording of survey data and automatic creation of necessary charts and tables can be performed using a surveying method based on target sight positioning that requires low facility costs.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to FIGS. 1 to 10. FIG. 1 shows an example of the configuration of an automatic bathymetric surveying device used in the present invention. This automatic bathymetric surveying device registers the coordinate positions of the survey line 3 and cut line 5 as survey line plan data as shown in Figure 3, and also plots the drawing scale, volume calculation range, etc. for creating management materials. A data registration unit 13 that registers condition data, planned cross-section data, and other conditions necessary for calculation processing, a digital echo sounder 11 that performs depth measurements from the sea surface and outputs the values as digital signals, and a survey line 3 to be surveyed.
Setting the survey line number, which is the number of the survey line number, and the cut line number, which is the number of the cutting line 5 that intersects, sending the cut signal when it intersects with the cut line 5, and sending out commands to start recording survey data and commands to end recording. a data recording unit 15 that records raw survey data, a printer 16 that prints out survey data, an X-Y plotter 17 that creates diagrams based on the survey data, Sometimes, signals from the digital echo sounder 11 and the local survey command unit 14 are received via the input/output control unit 18, and time data,
When receiving the water depth data and the cut signal, the position data of cut point 4, which can be obtained from the number of the cut line, is divided into survey line numbers as survey raw data as shown in Fig. 4 and sent to the data recording section 15. After recording the data, the already recorded survey raw data is read out by specifying the survey line number, and the position of each measurement point is calculated based on the distance between the cut lines 5 and the number of times of surveying between the cut lines 5. Then, after re-editing the survey position interpolation data as shown in Fig. 5, or correcting this survey position interpolation data with the positioning data registered in the data registration section 13, The water depth data is subjected to interpolation processing so as to become bathymetric data, edited as survey grid position interpolation data as shown in FIG. 6, and recorded in the data recording section 15.
an arithmetic processing unit 19 that uses a printer 16 and an X-Y plotter 17 to create management materials such as bathymetric maps, cross-sectional views, and soil volume calculation tables based on the drawing condition data and planned cross-section data registered in advance in 3; The instruction setting section (keyboard )20
It is made up of.

The local survey command unit 14, as shown in FIG.
Survey line number display section 21 and cut line number setting section 22
, a survey line number increase setting section 23 , a survey line number decrease setting section 24 , a cut signal input button 25 , a survey start command button 26 , and a survey line end command button 27
It is composed of:

FIG. 7 is a flowchart showing steps 28 to 36 when the local survey command unit 14 is operated to automatically record survey raw data along one survey line 3.

An example of the bathymetric surveying method of this embodiment according to this flowchart will be described next.

The survey line number of the survey line 3 to be surveyed is set by operating the local survey command unit 14 (step 29).
In this state, the survey ship 2 is sailed at a constant speed so as to see the target object 9 and not deviate from the predetermined survey line 3 (step 30). Survey start command button 26
is pressed to issue a command to start surveying (step 31), the digital acoustic depth sounder 11 measures the water depth at regular intervals, and the obtained water depth data is divided by survey line number and recorded in the data recording section 15. The cut line number setting section 2 sets the cut line number of the cut line 5 that will meet next.
2 (step 32), and when the target 10 is sighted and it intersects with the predetermined cut line 5, the cut signal input button 25 is pressed to output a cut signal, and the corresponding cut line number determined from the cut line number by this cut signal is The position data of the cut point is recorded in the data recording section 15 together with the water depth data (step 33). 1
When the surveying of the three survey lines 3 is completed (step 34),
Press the survey end command button 27 (step 35),
The recording of the survey raw data is completed, and the obtained survey line raw data is recorded in the data recording section 15 as survey data (step 36).

After recording the survey raw data, the recorded survey raw data is read out by specifying the survey line number, and the position of each measurement point is calculated based on the distance between the cut lines 5 and the number of times of surveying between the cut lines 5. After calculation is performed in the section 19, the data is edited again as survey position interpolation data as shown in FIG. Next, this survey position interpolation data is corrected using the tide level data registered in the data registration unit 13, and then the water depth data is interpolated in the arithmetic processing unit 19 so that it becomes depth measurement data at predetermined distance intervals. Then, the measured grid position interpolation data shown in FIG. 6 is obtained.

From this survey grid position interpolation data, printer 1
In step 6, a bathymetric map as shown in FIG. 8 is created. This bathymetric map shows the depth of the ocean floor using numerical values.

Also, from this survey grid position interpolation data,
A cross-sectional view of the ocean floor as shown in FIG. 9 is created using the plotter 17. This cross-sectional diagram also depicts the planned cross-section that will be the cross-section when construction is completed, as well as the calculation range when performing earth volume calculations.

Furthermore, an earth volume planning table in which the difference between the planned cross section and the cross section based on the survey grid position interpolation data is multiplied by the width (distance) of the cross section in the arithmetic processing unit 19 to calculate the excess or deficiency of the amount of soil to be input with respect to the planned value. is created by the printer 16 as shown in FIG.

(Effects of the Invention) As explained above, the bathymetric surveying method according to the present invention automatically records survey data using the target sight-seeing surveying method, which has the advantage of reducing facility costs. Furthermore, since the recording of survey data and the creation of necessary charts and tables are automatically performed, there is an advantage that the survey and subsequent processing can be carried out efficiently and quickly without any trouble.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an example of an apparatus for carrying out the method of the present invention, Fig. 2 is a perspective view of a local survey command unit used in this embodiment, and Fig. 3 is a diagram of survey line plan data in this embodiment. , Fig. 4 is a diagram of survey raw data in this embodiment, Fig. 5 is a diagram of survey position interpolation data in this embodiment, Fig. 6 is a diagram of survey grid position interpolation data in this embodiment, and Fig. 7 is a diagram of survey position interpolation data in this embodiment. FIG. 8 is a bathymetric map in this example, FIG. 9 is a cross-sectional view of the seabed in this example, FIG. 10 is a soil volume table diagram in this example, and FIG. FIG. 11 and FIG. 12 are a plan view and a sectional view showing the surveying situation of this embodiment and the conventional example. 1... Survey area, 2... Survey ship, 3... Survey line,
4...Cut point, 5...Cut line, 9, 10...
Target, 11... Echo sounder, 13... Data registration unit, 14... Local survey command unit, 15... Data recording unit, 16... Printer, 17... X-Y plotter, 18... Input/output Control unit, 19... Arithmetic processing unit.

Claims (1)

[Claims] 1. A survey line for guiding the surveying vessel in the navigation direction of the area to be surveyed;
A cut line that is perpendicular to the survey line and determines a cut point that is a reference measurement point on the survey line is predetermined by placing targets on the extension of these survey lines and the cut line, and While sailing the survey vessel along the above-mentioned lines, the depth of the water is sequentially measured at regular intervals from one cut point to the next, each having a known position, using a depth sounder. In a bathymetric survey method that measures the water depth at a point, the survey line number of the survey line to be surveyed is input from the local survey command unit to the data registration unit, and the survey vessel is navigated along the survey line with the survey number while The water depth is measured at regular intervals with a depth sounder, the water depth data is divided into sections according to the survey line numbers, and the data is automatically stored in the data registration section. By operation of the command section, each time the cut lines meet, the data registration section stores the water depth data at that time, performs such a survey for each of the survey lines, and after completing the survey, records the data for each of the survey line numbers. Calculating the data for each position of the water depth data collected in a calculation processing unit based on the distance between the cut lines and the number of times of surveying between the cut lines, and automatically storing the data in the data registration unit; A bathymetric surveying method characterized in that the data of the position and the water depth data of the position are then read out from the data registration unit along with the survey line number to automatically create a necessary chart.