JPS61181791A - Display unit for attitude control of floating body - Google Patents

Abstract

PURPOSE:To make a visually symbolic display performable, by measuring a liquid level of each floating body tank and a tilting direction of a floating body each, while displaying each detected value on a typical screen on a cathode-ray tube and also each level with a bar-form graphical chart as well as the tilting direction with an arrow, respectively. CONSTITUTION:Each liquid level of plural tanks for a floating body is measured by a tank level gauge 2, while a tilting direction and size of the floating body are detected with an inclinometer 4. Information on an attitude of the floating body obtainable out of each measured value is displayed on a typical screen on a cathode-ray tube 8 in a symbolic manner. Levels of each of tanks PL-B1-B4, and SL-B1-B4 of each floating body at both sides are displayed with a bar-form graphical chart 8b, while the tilting direction and size are displayed on the screen center with an arrow 11. As compared with the case of displaying only numerical value, this case displays all data in a visually symbolic manner so that accurate information is transmittable.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a display device for controlling the attitude of a floating body, and particularly to a display device for controlling the attitude of a floating body equipped with a plurality of tanks.

[Conventional technology 1 In conventional floating body attitude control panels, the draft at the four corners of the floating body.

The tank level of the ballast tank to change the attitude of the floating body, the trim and heel of the floating body, the status of the pump for ballast transfer, the status of the valve to change the direction of the flow of ballast water, and the pressure and flow rate of the ballast line. Displayed remotely.

However, the inclinometer may be attached to the wall near the control panel, independent of it.

The operator of the control panel (hereinafter simply referred to as the "tower operator") changes the draft or inclination of the floating body while looking at the values remotely displayed on the attitude control panel.

Normally, when a boat operator wants to change the attitude of a floating body (change the draft or change the inclination), the following four values are required.

(1) Draft of the four corners of the floating body.

(2) Floating body trim and heel.

(3) When changing the posture by raising the liquid level of the ballast tank and draining the ballast water: Conversely, when injecting water,
Is required. ) (4) Length and width distance from the center of the ship to the ballast tank.

By comprehensively determining all these values, the vessel operator determines which tanks should be filled with water, and operates the ballast valves and pumps.

Floating bodies with a small waterline area compared to the displacement ratio, such as semi-submersible floating bodies and floating docks, are susceptible to unexpected changes in inclination or draft due to the movement of a small amount of ballast water or the movement of heavy objects on the deck. Since this is likely to occur, the floating body attitude control panel must be able to immediately recognize the status of the floating body and ballast tank, and be able to operate pumps, valves, etc. promptly and appropriately.

[Problem to be Solved by the Invention 1] However, in the conventional attitude control panel, the inclination angle of the floating body is adjusted in the longitudinal direction (trim) and the width direction (heel) of the floating body using means such as communicating pipes or air bubbles. Only the magnitude of the inclination is displayed, and the only way for the boat operator to know the actual direction and angle of inclination is to read the trim gauge and heel gauge individually.

Knowing the direction of inclination is important information for operations to return the floating body to its original attitude.

In particular, if the floating body is shaking significantly and the trim gauge and heel gauge are shaking, or if the horizon cannot be seen from the room where the attitude control panel is located, or if the floating body is tilting significantly,
When the operator is upset, it may become increasingly difficult for the operator to accurately read the direction of inclination of the floating body.

In addition, in conventional attitude control panels, the liquid level in the ballast tank is often displayed in analog or numerical form on a liquid level gauge placed in a mimic diagram, indicating the ratio of arene and tank level. There's nothing left.

In addition, there are some methods that use numbers to express the ratio of tank level to arene and the liquid level using bar graphs, etc.
In that case, there is nothing displayed in the mimic diagram to show the positional relationship of the tanks.

In other words, the ratio of the arene required for water filling to the tank level required for draining is directly and simultaneously displayed to the operator's vision, and the position of the tank in the fore-aft and transverse directions of the floating body is also displayed simultaneously. There is no way to do that.

In particular, when a drilling rig is in motion, a large number of drill pipes placed on the deck move, and it is necessary to balance the rig, whereas conventional display means are not sufficiently satisfactory. The problem is that it has not been obtained.

The present invention aims to solve these problems, and is aimed at determining the inclination direction of the floating body, which is necessary for controlling the attitude of the floating body.

Provides a display device for controlling the attitude of a floating body that can simultaneously display the ratio of tank level to arene and the position of the tank in an easy-to-understand diagram, allowing the operator to safely and quickly change the floating body to the desired attitude. The purpose is to

[Means for Solving the Problems] Therefore, the display device for attitude control of a floating body of the present invention includes a plurality of tank level gauges for detecting the liquid level of each of the plurality of tanks of the floating body, and a plurality of tank level gauges for detecting the liquid level of each of the plurality of tanks of the floating body, and a display device for controlling the attitude of a floating body. A CRT monitor detects the attitude of the floating body by receiving detection signals from an inclinometer that detects direction and size, and the plurality of tank level meters and inclinometers.
(including a liquid crystal panel); and a tank arrangement display section that schematically displays the arrangement state of each tank of the floating body on the CRT screen; A tank level display section receives the liquid level detection signal from the tank level meter and displays the liquid level of the tank as a bar graph in each tank being displayed on the tank arrangement display section, and a The present invention is characterized by comprising a tilt display section that receives a tilt detection signal and displays the tilt direction and tilt angle of the floating body in a superimposed manner on the CRT screen.

[Operation 1] In the floating body attitude control display device of the present invention described above, upon receiving detection signals from a plurality of tank level meters and inclinometers,
On the RT screen, the tank arrangement display section of the display mechanism schematically displays the arrangement status of each tank of the floating body, and the tank level display section displays the liquid level in the tank being displayed as a bar graph. The inclination display section displays the inclination direction and the inclination angle of the floating body in a superimposed manner.

[Example J Hereinafter, an example of the present invention will be described with reference to the drawings.
Figures 1 to 3 show a display device for controlling the attitude of a floating body as an embodiment of the present invention. Figure 1 is a schematic diagram showing each display section on the CRT screen, and Figure 2 is the overall configuration. Figure 3 is a block diagram showing the
0-Chart.

As shown in Figure 2, the floating body has a draft gauge 1. Tank level meter 2. Pump pressure gauge 3. An electrical signal from the inclinometer 4 (which may not be necessary since the inclination can be calculated by the calculation unit from the signal from the draft gauge 1) is taken into the signal input unit 5.

Signals A/D converted by the signal input section 5 (liquid level signal S1, slope detection signal 82, etc.) are periodically taken into the control calculation section 6 via the wiring 31.

The control calculation section 6 stores sample data for several dozen times in the memory on the main body or on the auxiliary storage device 7, and simultaneously calculates the average value for the several dozen times.

When the control calculation unit 6 takes in the latest data, it discards the oldest data and always stores the latest several dozen data.

The control calculation section 6 also performs calculations based on the captured data for the purpose of displaying on the CRT display device 8 as a display mechanism, and writes the results to the CRT display device 8.

As shown in Figure 1, a CR that schematically displays the ballast tank arrangement of the lower hull of a semi-submersible rig for offshore oil field drilling.
The T display device 8 includes a tank arrangement display section 8a that schematically displays the arrangement state of each tank of the floating body on a CRT screen, and a tank arrangement display section 8a that receives the liquid level detection signal S1.
A tank level display section 8b displays the liquid level of the tank as a bar graph in each tank being displayed, and an arrow 11 is displayed on the CRT screen to indicate the direction of inclination and the magnitude of the inclination angle of the floating body in response to the inclination detection signal S2. and an inclined display section 8c that displays the circle 12 in an overlapping manner.

In addition, the code 10 in Fig. 1 is the pump chamber, La is the maximum depth, Lb is the average value of the measured values, and PL-Bl~4 are the port lower ballast tanks (port 5icle 1oude
r ballast tank) No. 1 to 4, 5L-
B1-4 are starboard lower ballast tanks (starboar).
cl 5ide lower ballast
tank) numbers 1-4 are shown respectively.

Further, the tank placement display section 8a and what is displayed by the display section 8a are indicated by the same reference numerals, and the same applies to the tank level display section 8b and the tilt display section 8c.

Since the display device for controlling the attitude of a floating body as an embodiment of the present invention is configured as described above, as shown in FIG.
The control calculation unit 6 displays the symbolic layout 8a of the ballast tank and the circle 12 as shown in FIG. 1 on the CRT display device 8 only once when the device is started (step al).
That is, first, the tank arrangement as shown in FIG. 1 is displayed in a fixed manner.

Then, when the measurement time of the predetermined period comes (step a2)
, inputs a signal from the signal input section 5 to the control calculation section 6 (step a3).

The control calculation unit 6 discards the oldest data and replaces it with the latest data (step a4), and calculates the average value of several ten measurement values (data) stored on the auxiliary storage device 7. (step aS).

Next, the ratio of the average value of the tank level to the maximum tank depth is determined (step a6), and the ratio is displayed in the tank layout diagram in the form of a column graph in different colors (liquid crystal display) in the corresponding tank. (Steps a7 to a9
).

That is, in step a6, the average value L of the measured values for the maximum depth La is calculated for all ballast tanks.
Find the ratio of b and similarly calculate the average value Lb of the tank level.
The ratio of the maximum tank depth La to the tank maximum depth La is displayed in the specified color.

Note that if the current measured value is smaller than the previous average value, the background color of the screen represents the decrease in the designated color (step a9). Therefore, the height represented by the designated color is It represents the tank level, and the background color represents the arene.

Note that in the tank layout diagram on the CRT display device 8, tank names and measured values are displayed as shown in FIG.

Next, using the trim and heel read from inclinometer 4,
The direction and magnitude of inclination are determined (step alo).

The left-right direction in the center circle 12 in FIG. 1 is the heel direction (starboard downwards is the rightward direction), and the vertical direction is the trim direction (the stern sinks downwards).

In step all, the center of the circle 12 and the point determined according to the size of the dream and heel are connected with the arrow 11, and the direction of inclination of the floating body is represented in a plane using the arrow 11 (step a13).

In other words, consider the xy coordinate axis with the origin at the center of circle 12,
The heel is taken on the x axis (horizontal axis), and the trim is taken on the y pongee (vertical axis).

Then, display the heel and trim on the xy pongee and connect the center (origin) of the circle 12 to make the arrow 11 (step a1
3).

As a result, the direction of this arrow 11 represents the direction of inclination of the floating body.

In addition, if the trim and heel are minute, arrow 11
is not displayed (step a12).

In this way, an arrow 11 of a size corresponding to the inclination direction and inclination angle of the floating body is displayed on the CRT display screen disposed facing the boat operator facing the bow direction of the floating body.

Then, draw a ballast tank layout diagram on the same screen, treating each individual ballast tank in the diagram as one bar graph, and calculating the current tank level (or ballast water By expressing the ratio of the ballast tank level to the arene using a palm graph, it is possible to simultaneously display the ratio of the ballast tank level to the arene and the relative position of that tank within the floating body.

[Effects of the Invention] As described in detail above, the display device for attitude control of a floating body of the present invention includes a plurality of tank level gauges that detect the liquid level of each of a plurality of tanks in a floating body, and an inclination of the floating body. an inclinometer that detects the direction and size of the floating body; and a display mechanism that receives detection signals from the plurality of tank level meters and inclinometers and displays the attitude of the floating body on a CRT screen. a tank arrangement display unit that schematically displays the arrangement state of each tank of the floating body on the CRT screen;
A tank level display section that receives liquid level detection signals from the plurality of tank level meters and displays the liquid level of the tank as a bar graph in each tank being displayed on the tank arrangement display section, and the inclinometer. The CRT detects the inclination direction and inclination angle of the floating body by receiving an inclination detection signal from the CRT.
The following effects and advantages can be obtained with a simple structure including a tilted display section that displays images in a superimposed manner on the screen.

(1) - Information such as the inclination direction of the floating body, the liquid level of the ballast tank, and the position of the arene and its ballast tank within the floating body, which are necessary for attitude control of the floating body, can be expressed symbolically.

(2) Under Paragraph 1 above, the floating body attitude operator can quickly make decisions regarding attitude changes even if the floating body has tilted significantly for some reason and the cause cannot be easily determined or the direction of the tilt cannot be determined due to large oscillations. It also helps to prevent erroneous production because the condition of the floating object can be determined visually rather than by numbers.

[Brief explanation of the drawing]

Figures 1 to 3 show a display device for controlling the attitude of a floating body as an embodiment of the present invention. Figure 1 is a schematic diagram showing each display section on the CRT screen, and Figure 2 is the overall configuration. Figure 3 is a block diagram showing the operation of the
0-Chart. 1. Draft gauge, 2. Tank level gauge, 3. Pump pressure gauge, 4. Inclinometer, 5. Signal input section, 6. Control calculation section, 7. Auxiliary storage device, 8.・CRT display device as a display mechanism, 8a...Tank placement display section, 8b...
Tank level display, 8c...tilt display, 9...keyboard, 10...pump chamber, 11...arrow, 12...circle, 31...wiring. Sub-Agent Patent Attorney Yoshihiko Iinuma Figure 1

Claims (1)

[Claims] A plurality of tank level meters that detect the liquid level of each of the plurality of tanks on the floating body, an inclinometer that detects the direction and magnitude of the inclination of the floating body, and detection from the plurality of tank level meters and the inclinometer. After receiving the signal, change the attitude of the above floating body to C.
and a display mechanism that displays the arrangement status of each tank of the floating body on the RT screen, and the display mechanism schematically displays the arrangement state of each tank of the floating body in the CR.
In response to the tank placement display section displayed on the T screen and liquid level detection signals from the plurality of tank level meters, a bar graph representing the liquid level of the same tank is displayed in each tank displayed on the tank placement display section. a tank level display unit that displays a tank level display unit, and a tilt display unit that receives a tilt detection signal from the inclinometer and superimposes and displays the tilt direction and tilt angle of the floating body on the CRT screen. A display device for controlling the attitude of a floating body, characterized in that: