JPH06127465A - Inclination test measurement method for ships - Google Patents

Abstract

(57) [Summary] [Purpose] An accurate tilt is measured using an inclinometer. [Composition] The inclinometer 1 is installed on the hull 5, and weights 7 and 8 having the same weight are placed at positions where the left and right distances L from the center 6 of the hull 5 are equal. First, one weight 7 is attached to the other weight 8 side. The tilt angle of the hull 5 is measured with a predetermined number of cycle times within a fixed time by the inclinometer 1, the measured tilt angle is integrated over a set time, and the average value of the integrated values during the set time is calculated. One inclination angle is calculated, the one weight 7 that has moved next is returned to the original position, the other weight 8 is moved to the one weight 7 side, and the other inclination angle is similarly set by the inclinometer 1. To calculate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inclination test measuring method for a ship, a marine structure, etc., for inclining a ship and measuring a rocking cycle.

[0002]

2. Description of the Related Art When a ship or the like is constructed, a center of gravity assessment test is obligatory. By this test, it is possible to know the light load amount, the load amount, the longitudinal and vertical position of the center of gravity of the ship. In particular, the height of the center of gravity in the vertical direction has a significant effect on the stability performance of the ship, and therefore accurate measurement is required.To know the height of the center of gravity in the vertical direction, the floating hull must be forced. It is performed by inclining laterally.

When carrying out a tilt test of a hull, a weight having the same weight is placed at positions equidistant from the center of the hull, and one weight is first moved to the other side by a crane or the like to obtain one tilt angle. Is then returned to the original position, the other weight is moved to one side, and the tilt angle of the other is measured.

Conventionally, in order to measure the inclination angle of the hull, a pendulum having a length of about 5 to 20 meters is used.
The weight at the lower end was placed in a water tub to resist shaking, and a scale plate was attached to the upper edge of the water tub so that the shaking width could be read.

[0005]

The conventional pendulum is mounted on the ship in the longitudinal direction of the ship in two or three places to perform an inclination test. At each position where the pendulum is mounted, a reader and a recorder are required.
The name was needed, and the dispatcher needed to be dispatched to the bridge, and a large number of personnel had to be assigned.

[0006] Further, the reading of the swing width depends on the human eyes, and in particular, when the swing of the hull is irregular, individual differences inevitably occur, which may impair the uniformity of the test.

The present invention eliminates such conventional drawbacks,
It is an object of the present invention to provide a ship tilt test measuring method capable of accurately measuring the tilt with a small number of personnel regardless of the eyes of a person who causes individual differences.

[0008]

According to the inclination test measuring method for a ship of the present invention, an inclinometer is installed on a hull and a weight having the same weight is placed at a position equidistant from the center of the hull, and one of The weight is moved to the other weight side and the tilt angle of the hull is measured with a predetermined number of cycle times within a fixed time by the inclinometer, and the measured tilt angle is integrated over a set time, and the integrated value Calculate one tilt angle from the average value during the set time, then return the one weight moved to the original position, move the other weight to the one weight side, and use the inclinometer. Measuring the inclination angle of the hull at a predetermined number of cycle times within a fixed time, integrating the measured inclination angle over a set time, and calculating the other oblique angle from the average value of the integrated values during the set time. It is characterized by.

[0009]

[Function] By simply replacing the weight, it is possible to accurately measure the tilt angle in both the left and right directions with the inclinometer without relying on the human eyes.

[0010]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 3 is a perspective view of an apparatus used in the method of the present invention, which includes an inclinometer 1, a handheld computer 2,
A power supply box / storage box 3 is provided and is connected to each other by a cord 4.

FIG. 1 is a front view of a hull 5 for testing and measuring the inclination, and FIG. 2 is a side view thereof. The inclinometer 1, the handheld computer 2, the power supply box / storage box 3 of FIG. It will be installed at an appropriate place such as the Rashinabashi Bridge, Nautical Funabashi, and chart room. Further, weights 7 and 8 having the same weight are placed on the hull 5 at the same lateral distance L from the center 6 (see FIG. 1) passing from the bow to the stern of the hull 5 by a crane or the like not shown.

First, the weight 7 on one side of the weights 7, 8 placed at the position where the left and right distances L are equal from the center 6 is moved to the side of the weight 8 on the hull 5 by a crane or the like. As a result, the hull 5 loses its left-right balance and swings to the left and right.

The left-right sway of the hull 5 is measured by the inclinometer 1 at a predetermined number of cycle times within a fixed time such as a cycle time of 3 times per second, etc. Is integrated by the handheld computer 2 for a set time such as integrating for 1 minute to calculate an average value for 1 minute, calculates the average value of the integrated values during the set time, and displays the calculated average value. , Print. Separately from this, by displaying and printing the sampled angles as dots in time series, the oscillation period can be obtained.

Next, the removed weight 7 on one side is returned to its original position on the hull 5 by a crane or the like, and the weight 8 on the other side is moved to the weight 7 side on the hull 5. The hull 5 loses its left-right balance and swings left and right.
As for the shaking at this time, the tilt angle is measured by the inclinometer 1 at a predetermined number of cycle times within a fixed time, as described above,
The tilt angle measurement value is integrated by the handheld computer 2 for a set time, an average value of the integrated values during the set time is calculated, and the calculated average value is displayed and printed.

With this, it is possible to automatically calculate the swaying state when tilted to the left and right, and further to know the vertical center of gravity of the hull from the tilt angle.

Although the above embodiments have been described with respect to the hull, the present invention is not limited to the hull and can be applied to marine structures.

[0018]

INDUSTRIAL APPLICABILITY By using an inclinometer, the present invention has the effect of accurately measuring the inclination of the hull with a small number of personnel and without relying on the human eyes.

[Brief description of drawings]

FIG. 1 is a front view of a hull for carrying out the method of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a perspective view of an apparatus used in the method of the present invention.

[Explanation of symbols]

 1 Inclinometer 5 Hull 6 Center 7 Weight 8 Weight L Left and right distance

Claims (1)

[Claims] 1. An inclinometer is installed on a hull, and weights of the same weight are placed at positions equidistant from the center of the hull, and first one weight is moved to the other weight side, and the inclinometer is moved. By measuring the inclination angle of the hull at a predetermined number of cycle times within a certain time by, the measured inclination angle is integrated over a set time, and one inclination angle is calculated from the average value of the integrated values during the set time. Then, the one weight moved to the original position is returned to the original position, the other weight is moved to the one weight side, and the inclination angle of the hull is determined by the inclinometer at a predetermined number of cycle times within a certain time. Is measured, the measured tilt angle is integrated over a set time, and the other tilt angle is calculated from the average value of the integrated values during the set time.