JPS63180813A - Depth surveying method - Google Patents

Abstract

PURPOSE:To automatically record survey data and to automatically form a necessary chart even when no expensive equipment is used, by constituting a this-side survey order part by a measuring line number display part, a cut line number setting part and a cut signal input button. CONSTITUTION:The measuring line number of a measuring line 3 having to perform surveying is inputted to a data registering part 13 from a this-side survey order part 14 and the depth of water is measured at every definite time by a digital acoustic depth sounder 11 while a survey ship 2 is navigated on the measuring line 3 of said measuring line number and the depth-of-water data thereof are divided at every measuring line number to be stored in the data registering part 13. Then, the cut numbers of cut lines 5 successively crossing each other are stored in the data registering part 13 corresponding to the depth-of-water data are the crossing time of the cut lines 5 at each time when the cut lines 5 cross each other by the operation of the order part 14. By this constitution, survey is performed at every measuring line and, after survey is finished, the data at each position of the depth-of- water data collected at every measuring line number is calculated on the basis of the distance between the cut lines and the survey number of times between the cut lines by an operational processing part 19 to be stored in the data registering part 13 and, thereafter, not only position data but also the depth-of-water data at that position are read from the registering part 13 along with the measuring line number to automatically prepare a necessary chart.

Description

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

(Prior art) For example, when constructing a foundation mound for a breakwater, etc.
Bathymetric surveying will be carried out for the purposes of preliminary investigation, understanding construction progress, completion inspection, etc.

As one of the conventional bathymetric single volume methods, Figures 11 and 12
The bathymetric survey method is carried out by sight-seeing positioning as shown in the figure. This surveying method consists of a survey line 3 that is a guiding line in the navigation direction (Y direction) of a survey vessel 2 conducting surveying, and a line that is orthogonal to this survey line 3 for an area 1 that is the subject of bathymetric surveying. A cut line 5 in the Y direction that determines the cut point 4, which is the reference measurement point on the survey line 3, is placed on the extension of the survey line 3 and the cut line 5. Anchor 8
9.10) are fixed in place, and during the survey, the designated point on the extension of the siding 3 is set from the top of the surveying vessel 2. While sailing at a constant speed while observing the target 9 and strictly monitoring its deviation so as not to deviate from the survey line 3, the depth to the seabed 12 is measured at regular intervals with the echo sounder 11. Record the data on recording paper in correspondence with the measurement time. When the target 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 recorded recording paper are divided by the number of measurement points, and the water depth data at each dividing 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 is used to determine the ship's position.

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.

(Problems to be Solved by the Invention) However, in the former bathymetric surveying method, it is difficult to collect position data, water depth data, etc. from recording paper. Since the process from reading 1llI data to creating management materials must be performed manually, there is a problem in that the work is complicated and time-consuming.

On the other hand, in the latter bathymetric survey method, (a) positioning means #i
! Installation costs are high, (0) the types of radio waves that can be used are limited, and (c) there are obstacles between the main station and slave stations, or the same frequency is used near the survey area. In some cases, radio interference occurs, 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 a target on the extension of these survey lines and the cut line, and While sailing the survey ship, 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, and this is repeated to determine the depth of the water at each point on each of the survey lines. In a bathymetric surveying method for measuring water depth, the survey number of the survey line to be surveyed is input from the local survey command unit to the data registration unit, and the survey ship is navigated along the survey line with the survey number while the sounding machine The water depth is measured at regular time intervals, 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. This operation causes the data registration unit to store the meeting verses of the cut line in correspondence with the water depth data at that time, performs such a survey for each of the survey lines, and after the survey is completed, data is collected for each of the survey line numbers. The arithmetic processing unit calculates data for each position of the water depth data based on the distance between the cut lines and the number of surveying between the cut lines, and automatically stores the data in the data registration unit. The present invention is characterized in that data on the position and water depth data at the position are read together with the survey line number from the data registration unit to automatically create a necessary chart.

(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 determines the position on the coordinates of the survey line 3 and cut line 5 by the third
Data registration that is registered as siding plan data as shown in the figure, as well as drawing condition data such as drawing scale and earth volume calculation range for creating management materials, planned cross-section data, and other conditions necessary for calculation processing. 13, a digital acoustic sounder 11 that performs sounding from the sea surface and outputs the value as a digital signal, and setting of a survey line number that is the number of the survey line 3 to be surveyed and a cut line number that is the number of the intersecting cut line 5. , a local survey command unit 14 that sends out a cut signal when it intersects with the cut line 5, a survey data recording start command, and a recording end command; a data recording unit 15 that records survey raw data; A printer 16 that prints out data, etc., and an X that creates drawings based on survey data, etc.
-Y plotter 17 receives signals from digital echo sounder 11 and local vIIA quantity command unit 14 during surveying via input/output control unit 18 at predetermined time intervals (for example,
When receiving time data, water depth data, and a cut signal every 1 second, the position data of cut point 4, which can be obtained from the cut line number, is collected as survey raw data for each measurement number as shown in Figure 4. 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 determined by the distance between the cut lines 5 and the distance between the cut lines 5. After calculating and finding it based on the number of times of surveying, you can edit it again as survey position interpolation data as shown in Figure 5, or register this I11 position interpolation data in the data registration section 13 and use the tide level data. After the correction, the water depth data is subjected to interpolation processing so that it becomes sounding data at predetermined distance intervals, and edited as survey grid position interpolation data as shown in FIG.
At the same time, management materials such as bathymetric maps, cross-sectional views, and soil volume calculation tables are recorded on the printer 16 or
- Registration of siding plan data, plotting condition data, planned section data, tide level data, etc. to the arithmetic processing section 19 created by the Y plotter 17 and data registration section 13, and creation of management materials during post-processing of survey raw data. It consists of an instruction setting section (keyboard>20) that gives instructions on the work contents for the operation.

As shown in FIG. 2, the local survey command section 14 includes a survey line number display section 21, a cut line number setting section 22, a survey line number increase setting section 23, a side line number decrease setting section 24, and a cut signal input capo. 25, a survey start command button 26, and a survey end command button 27.

FIG. 7 is a flowchart showing steps 28 to 36 when the on-hand 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 below.

The survey command unit 14 is operated to set the survey line number of the survey line 3 to be surveyed (step 29).

In this state, the survey ship 2 is sailed at a constant speed so as to see the target 9 and not pass over the predetermined survey line 3 (step 30). Press the survey start command button 26 to issue a survey start command (step 31), measure the water depth at regular intervals with the digital acoustic depth sounder 11, classify the obtained water depth data by survey line number, and store it in the data recording section 15. Record. Set the cut line number of the next intersecting cut line 5 in the cut line number setting section 22 (step 32), look through the target 10,
When a predetermined cut line 5 is encountered, the cut signal input capo button 25 is pressed to issue a cut signal, and the position data of the cut point determined from the cut line number generated by this cut signal is recorded in the data recording unit 15 together with the water depth data. (Step 33). When the survey for one survey line 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 raw data is stored in the data recording section 15 as survey data. Record (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 by the calculation processing unit based on the distance between the cut lines 5 and the number of surveys performed between the cuts 115. After calculating and finding it in step 19, it is edited again as □ survey position interpolation data as shown in Fig. 5. Next, this survey position interpolation data is corrected using tide level data registered in the data registration section 13, and then the water depth data is subjected to interpolation processing in the arithmetic processing section 19 so as to become depth measurement data at each predetermined distance interval. Then, the measured grid position interpolation data shown in FIG. 6 is obtained.

From this survey grid position interpolation data, the printer 16
Create a bathymetric map as shown in the figure. This bathymetric map shows the depth of the ocean floor using numerical values.

Further, from this survey grid position interpolation data, a cross-sectional view of the ocean floor as shown in FIG. 9 is created using an X-Y plotter 17. This cross-sectional view also depicts the planned cross-section that will be the cross-section when construction is completed, and the calculation range when performing upper trowel 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 the drawing]

FIG. 1 shows the method of the present invention in practice. Fig. 2 is a perspective view of the local survey command unit used in this embodiment, Fig. 3 is a survey line plan data diagram in this embodiment, and Fig. 4 is a diagram showing an example of the survey line plan data in this embodiment. Survey raw data diagram,
Fig. 5 is a survey position interpolation data diagram in this embodiment, Fig. 6
The figure is a survey grid position interpolation data diagram in this embodiment, No. 7
Figure 8 is a flowchart showing the operation during surveying in this example, Figure 8 is a bathymetric map in this example, Figure 9 is a cross-sectional view of the seabed in this example, and Figure 10 is a soil volume meter in this example. The table, 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 section,
14... Hand 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] A survey line to guide the surveying vessel in the navigation direction of the area to be surveyed, and a cut line that is perpendicular to the survey line to determine the cut point that is the reference measurement point on the survey line. are predetermined by placing targets on the extensions of these survey lines and cut lines, and while the survey ship is sailing along the survey lines, from a certain cut point whose position is known to the next one. In the bathymetric surveying method, in which the water depth is sequentially measured using a sounding device at regular intervals up to the cut point, and this is repeated to measure the water depth at each point of each of the above-mentioned surveys, the local survey command unit sends information about the current survey to the data registration unit. Enter the survey line number of the survey line to be carried out, and while the survey ship is sailing along the survey line with the survey line number, the water depth is measured at regular intervals with the depth sounder, and the water depth data is divided by the survey line number. The cut line numbers of the cut lines that meet sequentially are stored in the data registration unit automatically, and each time the cut lines meet, the cut line numbers of the cut lines that meet sequentially are stored in the data registration unit as water depth data at that time. Such a survey is performed for each of the survey lines, and after the survey is completed, the data at each position of the water depth data collected for each survey line number is stored in correspondence with the distance between the cut lines and the cut line. A calculation processing unit calculates the calculation based on the number of times of surveying during that period and automatically stores it in the data registration unit, and then reads out water depth data at the position together with the data of the position from the data registration unit along with the survey line number. A bathymetric surveying method characterized by automatically creating necessary charts and tables.