JPS6113053B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cutter head position monitoring device that combines a microcomputer and a display device, and is particularly used when dredging the seabed etc. with a cutter suction dredger. Pertains to drilling monitoring equipment.

[Conventional technology]

Seabed excavation work using a dredger has conventionally been carried out by using a gyro repeater to memorize and monitor left and right set angles, or by monitoring left and right set angles with a swing angle setting device.

[Problem that the invention seeks to solve]

However, with the above-mentioned conventional monitoring device, it is difficult to monitor the dredging shape because it only issues an alarm when the set angle is reached and notifies the switch of the swing direction.

In addition, the position of the trunnion differs depending on the inclination of the dredger, causing errors in the rudder depth and other problems, such as the uneven finish of the dredged surface unless it relies on the hands of a skilled dredge master.

In view of the above circumstances, the present invention enables automatic and visual monitoring of the dredged shape during seabed excavation work using a cutter suction dredger, and enables even non-skilled dredge masters to carry out dredging in a planned manner. The purpose of this design was to provide a cutter head position monitoring device that would make it possible.

[Means for solving problems]

The cutter head monitoring device according to the present invention includes a calculation device, a gyro compass that detects elements necessary for calculating the changing cutter head position and inputs them to the calculation device, a rudder inclination angle oscillator, a sputter oscillator, and a spout. A position transmitter, a tide level transmitter, an operation panel for setting excavation conditions such as a planned excavation course, excavation width, contour, etc. and inputting the same to the arithmetic device, and a display and an alarm connected to the arithmetic device. The arithmetic unit displays on the display the moving state of the cutter head position calculated based on the outline etc. set on the operation panel, and when the cutter head position exceeds the displayed outline, an alarm is generated by the alarm. It is characterized by being configured to do so.

[Effect]

According to the monitoring device of the present invention, it is possible to carry out a method of instructing the cutter head position and dredging. In this method, as shown in FIG. 4, the upper width a, the lower width b of the planned excavation contour, the distance d from the water surface to the bottom of the planned excavation, and the center position are preset, respectively, and then dredging is started. In this case, it is necessary to configure the system so that a warning is issued when the swing and rudder reach their expected positions.

Embodiment Hereinafter, an explanation will be given based on an embodiment shown in FIG. The monitoring device of this embodiment is applied to the spud-carriage type dredger shown in FIG. 3.

In FIG. 1, 1 is a gyro compass, 2 is a rudder inclination angle transmitter, 3 is a draught transmitter, 4 is a spud position transmitter, and 5 is a tide level transmitter.
These signals are sent to the arithmetic unit 6. This computing device 6 is connected to an operation panel 7, an alarm device 9, and a CRT display 8. The operation panel 7 is equipped with switches, push buttons, etc. necessary for presetting the contour of planned seabed excavation, inputting the dredging course direction, etc. In addition, the cutter head position and the planned outline of seabed excavation are displayed on the CRT display 8 as shown in Figure 2, making it possible to visually monitor the situation in which the earth and sand are being dredged in accordance with the planned outline of seabed excavation. There is.

The details of the operation of each part in the above embodiment and the monitoring method using the apparatus of the embodiment are as follows.

First, to explain the details of the functions of each part, the gyroscope 1 transmits the azimuth signal Pb of the dredger hull to the calculation device 6. The calculation device 6 calculates the angular difference between the dredging course direction set on the operation panel 7 and the hull azimuth signal Pb, that is, the swing angle P, and uses this as one of the calculation elements.

The rudder inclination angle transmitter 2 transmits a rudder inclination angle signal θ with respect to the horizontal plane to the calculation device 6.

The water swamp transmitter 3 transmits the water swamp signal β of the hull to the arithmetic unit 6. The hull water intake changes depending on the specific gravity of the seawater, the angle of inclination of the cutter head, the amount of dredged soil in the suction pipe, etc., and is important variable information for accurately monitoring the position of the cutter head.

The spud position transmitter 4 is required in the case of a spud carriage type ship in which the spud 11 is provided to move relative to the hull 10 in the longitudinal direction as shown in FIG. In this case, spud 11
is driven into the seabed and fixed, and is expanded and contracted by a cylinder (not shown) in which a spud carriage portion ₁₀₂ of the hull 10 is built. As a result, the hull fixing part ₁₀₁ moves forward and backward relative to the spud 11. The spud position transmitter 4 is
A distance signal LL (spud carriage stroke) from the hull fixed part ₁₀₁ to this relatively moving spud 11 is transmitted to the calculation device 6.

The tide level transmitter 5 transmits the tide level detected by a tide level detector installed on the seabed nearby, that is, the depth signal c from the water surface to the bottom of the water, to the calculation device 6. For example, as shown in Figure 4, when displaying the contour of the planned excavation cross section, this tide level signal c is applied to the upper limit of the contour from the water surface level (horizontal dotted line in the figure) to the tidal depth position, that is, the seabed surface. Used as a calculation element to specify the level. Therefore, when the cutter head marker (□ mark) is above the upper limit of the planned excavation cross-sectional profile on the display screen, the excavation is in an empty excavation state.

On the other hand, the operation panel 7 displays the planned excavation route, the distance α from the bottom of the ship to the rudder trunnion, and the hull fixing part 1.
₀ Required conditions such as length L, dredging ladder length, excavation width, and excavation depth are set and input into the calculation device.

Next, the operation of the entire apparatus will be explained. The cutter head position is identified by the calculator 6 based on the signals transmitted from each of the devices 1, 2, 3, and 4. Based on this cutter head position, the signal from the tide level transmitter 5, and the presetting etc. from the operation panel 7, the computer monitors the cutter head position, and an alarm 9 is activated when the cutter reaches the expected position.
A warning will be issued.

Here, the cutter head position is determined by the following formula, and the vertical position X and horizontal position Y are accurately calculated.
Display the marker position (see Figure 3).

X=・sinθ−(α−β) Y=(√ ² −(・) ² +L+LL)・
sinP Distance from the bottom of the ship to the rudder trunnion β; Ship's water retention L; Distance from the retracted position of the spud to the rudder trunnion LL; Spud carriage stroke P; Swing angle from the dredging course direction The calculation device 6 is connected to the operation panel 7. It memorizes the necessary row height input from , and calculates the outline of the planned excavation cross section calculated from the input tide level c, given dredging width, and dredging depth in relation to the sea level (horizontal dotted line) as shown in Figure 4. At the same time, the cutter head position X, Y calculated over time as described above is displayed on the display 8, and the cutter head marker marked □ is used to indicate the distance X downward from the sea level mark (dotted line) and the vertical center of the outline. It is displayed at a distance Y in the horizontal direction from the line in relation to the planned excavation cross-section contour, and an alarm is generated when the marker exceeds the contour.

As is clear from the above description, according to the cutter head position monitoring device of this embodiment, the planned dredging shape of the seabed to be dredged is input and stored in the arithmetic unit 6 via the operation panel 7, and is also displayed on the CRT display 8. Is displayed. On the other hand, the position of the cutter head moving on the seabed by the operator's operation is calculated by the calculation device 6 via the detection transmitters 1 to 5, and is displayed on the CRT display 8 in relation to the planned dredging shape. Furthermore, if the cutter head exceeds the planned dredging shape, an alarm will be activated with the alarm 9, so unlike conventional dredging that relies on skill and intuition, the dredged shape can be automatically monitored. , it is possible to carry out planned dredging with simple operations.

Note that being able to automatically monitor means that the computer constantly monitors whether the cutter head is within the range of the planned dredging shape. Therefore, by using the monitor results displayed on the CRT, dredging operations can be controlled in various ways. For example, in addition to simply issuing an alarm, it is also possible to perform control such as automatically stopping the operation of the cutter suction by combining known techniques.

〔Effect of the invention〕

As detailed above, according to the monitoring device of the present invention, the dredged shape can be automatically and visually monitored, and dredging can be carried out in a planned manner even if one is not a skilled dredge master. , a remarkable effect can be obtained.

[Brief explanation of the drawing]

Figure 1 is a block configuration diagram of an embodiment of the present invention applied to submarine dredging, and Figure 2 is a block diagram of the same equipment.
Fig. 3 is an explanatory diagram of the principle of dredging work, and Fig. 4 is an explanatory diagram of the CRT display. 1...Gyroscope compass, 2...Rudder inclination angle transmitter, 3...Hatchling oscillator, 4...Spud position transmitter, 5...Tide level transmitter, 6...Arithmetic unit, 7
. . . Operation _{panel ,} 8 .

Claims (1)

[Claims] 1. A calculation device, a gyro compass that detects the elements necessary to calculate the fluctuating cutter head position and inputs them to the calculation device, a rudder inclination angle oscillator, a draught oscillator, a spud position oscillator, and a tide level transmitter, and a planned excavation course. , an operation panel for setting and inputting excavation conditions such as excavation width and contour to the arithmetic device, and a display and an alarm connected to the arithmetic device, the arithmetic device being set by the operation panel. A cutter characterized in that the moving state of the cutter head position calculated based on the contour etc. displayed is displayed on the display, and when the cutter head position exceeds the displayed outline, an alarm is generated by the alarm device. Cutter head position monitoring device on a suction dredger.