WO2015080399A1

WO2015080399A1 - Automatic draft adjustment device for model ship

Info

Publication number: WO2015080399A1
Application number: PCT/KR2014/010777
Authority: WO
Inventors: 황승현; 반석호; 임근태; 안해성; 이영연; 김철희; 김명수; 유윤규; 이창용
Original assignee: 한국해양과학기술원
Priority date: 2013-11-28
Filing date: 2014-11-11
Publication date: 2015-06-04
Also published as: CN105980822A; KR101460457B1

Abstract

The purpose of the present invention is to provide a device which can enable quick and accurate setting of a draft condition of a model ship by means of an automated system without manually changing the position of a weight during a model test. In order to attain the purpose, the present invention provides an automatic draft adjustment device for a model ship, the automatic draft adjustment device comprising: a draft measurement apparatus which is provided on a model ship, measures the draft of the model ship, and transmits a measured draft value to a wireless transmission and reception apparatus; the wireless transmission and reception apparatus which is provided on the model ship, communicates wirelessly with a wireless adjustment apparatus, transmits the measured draft value from the draft measurement apparatus to the wireless adjustment apparatus, receives a gravity center changing command from the wireless adjustment apparatus, and transmits same to a gravity center changing apparatus; the wireless adjustment apparatus which is provided on the outside of the model ship and, if the measured draft value from the draft measurement apparatus is different from a pre-calculated set draft value, generates a gravity center changing command; and the gravity center changing apparatus which is provided on the model ship and, if the wireless adjustment apparatus generates the gravity center changing command, automatically changes the position of the gravity center of the model ship by means of the linear reciprocating motion of a weight.

Description

Model ship draft automatic control

The present invention relates to a model ship draft automatic control device, and more particularly, to accurately and accurately match the draft conditions of the model ship through an automated system without manually changing the position of the weight in performing the model test It is about a device to make it.

As a method for predicting the velocity performance of solid lines in the design stage, model tests such as resistance and propulsion tests are carried out in towing tanks using model lines with solid lines and geometric similarities. Such model tests are carried out in a state where the model ship is fitted to specific draft conditions such as design conditions and ballast conditions, and the measurement results of the model test are influenced by how accurately the draft condition of the model ship is met.

In general, the process of setting up the model line to fit the draft condition is as follows. First, the weight of the model ship is subtracted from the drainage that fits the draft condition of the model ship and the amount of weight added to the model ship is calculated. Second, the calculated weight is loaded on the model ship, and the weight weight is changed so that the free surface (surface of the towing tank) and the draft line indicated on the model ship coincide.

Meanwhile, in the second process, the procedure of repeating and lifting the weight in the model line is repeated to change the position of the weight, and thus lifting and lowering the weight in the model line causes the model to be moved up and down, driven, and lateral. Vibration such as shaking may occur. If the model ship vibrates in this way, it is necessary to wait until the vibration attenuates to visually check whether the draft line corresponds to the free surface. Therefore, it is necessary to pay close attention to minimize the vibration of the model line when changing the position of the weight, and the process takes much time and effort.

The present invention has been proposed to solve the above problems, an apparatus for quickly and accurately adjusting the draft condition of the model ship through an automated system without changing the position of the weight manually in performing the model test The purpose is to provide.

In order to achieve the above object, the present invention, a draft measurement device is installed on the model ship to measure the draft of the model ship and transmit the measured draft value to the wireless transmission and reception apparatus; It is installed on the model ship and communicates wirelessly with the radio control device, but transmits the measured draft value of the draft measurement device to the radio control device, and receives the center of gravity change command from the radio control device and transmits it to the weight center change device. Device; A wireless control device installed outside the model ship and generating a weight center change command when a measured draft value of the draft measurement apparatus is different from a preset calculated draft value; Installed on the model ship when the center of gravity change command of the radio control device weight center changer for automatically changing the position of the center of gravity of the model ship through the linear reciprocating movement of the weight, including; To provide.

In the present invention, the draft measurement device is installed on the bow and stern and the port and starboard of the model ship, respectively.

In the present invention, the center of gravity change device, the ball screw placed on the base having a flat bottom surface; A moving part for mounting the weight in a detachable state and reciprocating along the ball screw; And a motor for driving the ball screw to move the moving part.

In the present invention, the apparatus for changing the center of gravity further comprises an LM guide supporting the moving parts on both sides of the ball screw so that the moving part can be stably moved.

In the present invention, the center of gravity change device is installed in the width direction of the model ship is installed in the longitudinal direction of the width direction weight center change device and the longitudinal direction of the model ship to change the position of the center of gravity in the width direction of the model ship, The longitudinal weight changing device for changing is characterized in that the pair acts.

In the present invention, the widthwise center of gravity change device is characterized in that it is installed in the vertical direction with respect to the center line of the model line.

In the present invention, the longitudinal weight center changing device is characterized in that it is installed in the horizontal direction with respect to the center line of the model ship.

In the present invention, the radio control apparatus issues a weight center change command to only one of the widthwise weight center changing device and the longitudinal weight center changing device, or the widthwise weight center changing device and the longitudinal weight center. It is characterized by issuing the center of gravity change command to all the change devices at the same time.

According to the present invention, it is possible to quickly and accurately match the draft conditions of the model ship through an automated system without manually changing the position of the weight in performing the model test.

1 is an installation example (side view of a model line) of a draft measurement apparatus according to the present invention.

Figure 2 is a configuration (model plan view) of the model ship draft automatic control device according to the present invention.

Figure 3 is a configuration and operation example of the center of gravity change device according to the present invention.

10: draft measurement device 20: wireless transmission and reception device

30: radio control device 40: weight center change device

40a: widthwise center of gravity changing device 40b: longitudinal weight of center changing device

41: base 42: ball screw

43: weight 44: moving part

45: motor 46: LM guide

50: model ship 60: storage battery

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible, even if shown on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 shows an installation example (side view of a model line) of a draft measurement apparatus according to the present invention. And Figure 2 shows the configuration (plan view of the model line) of the model line draft automatic control device according to the present invention. And Figure 3 shows the configuration and operation example of the center of gravity change device according to the present invention.

The present invention aims to provide an apparatus for quickly and accurately adjusting the draft conditions of the model ship 50 through an automated system in performing a model test, the present invention for achieving this object, Draft measuring device 10, wireless transmission and reception device 20, wireless control device 30 and the center of gravity change device 40 is made (FIG. 2).

The draft measurement apparatus 10 is installed in the model ship 50 to measure the draft of the model ship 50, and transmits the measured draft value to the radio transceiver 20. Draft measuring device 10 and the wireless transmission and reception device 20 is connected by wire in the model line (50). In addition, the draft measurement apparatus 10 is connected to the storage battery 60 installed in the model line 50 by a power line and receives power from the storage battery 60. As the draft measurement apparatus 10, a servo wave height meter or the like may be used.

Regarding the installation position of the draft measuring apparatus 10, the draft measuring apparatus 10 is preferably installed in the bow and stern, port and starboard of the model ship 50, respectively (FIGS. 1 and 2). This may be caused by the inclination of the model ship 50 in the front, rear, left and right directions of the model ship 50. In this case, the draft of the model ship 50 may appear differently in the bow and the stern, the port and the starboard. Therefore, in order to accurately measure the draft of the model ship 50 at this time, it is necessary to measure the draft at least four points in the front, back, and left and right sides of the model ship 50.

The radio transceiver 20 is installed on the model ship 50 and communicates with the radio control device 30 outside the model ship 50 wirelessly (FIG. 2). The wireless transmission / reception apparatus 20 is connected to the storage battery 60 installed in the model line 50 by a power line and receives power from the storage battery 60. The wireless transmitter / receiver 20 receives the measured draft value from the draft measurement device 10 and transmits it to the radio controller 30. And if the radio control device 30 generates the center of gravity change command according to the measured draft value it is received from the radio control device 30 and transmitted to the center of gravity change device (40).

The radio control device 30 is installed outside the model ship 50 to communicate wirelessly with the radio transceiver 20 (FIG. 2). The radio controller 30 monitors the measured draft value of the draft measurement device 10 received from the radio transmitter / receiver 20 to determine whether the measured draft value matches the preset calculated draft value. Here, the 'set draft value' is a pre-input of the draft value at the installation position of the draft measuring device 10 to the radio controller 30 so as to satisfy the draft conditions, such as design draft, ballast draft of the model ship 50 ( Setting). In this case, the reason for using the draft value at the installation position of the draft measurement apparatus 10 is that the condition where the model ship 50 is inclined to bow and stern, port and starboard according to draft conditions is subject to model test. Because it can be.

The radio controller 30 generates a weight center change command when the measured draft value of each draft measurement apparatus 10 is different from a preset calculated draft value. Here, the 'weight center change command' is a command to change the center of gravity of the model line 50 to adjust the draft of the model line 50 so that the measured draft value coincides with the set draft value. More specifically, the command is a command that requires the center of gravity change device 40 to move the weight 43. As such, when the radio controller 30 generates the weight center change command, the wireless center receiver 20 receives the weight center change command and transmits the weight center change command to the weight center change device 40.

The center of gravity change device 40 is installed on the model ship 50, and the center of gravity of the model ship 50 through a linear reciprocating movement of the weight weight 43 when the center of gravity change command of the radio control device 30 is received. Change location automatically. The center of gravity change device 40 and the wireless transmission and reception device 20 are connected by wire in the model line 50. And the center of gravity change device 40 is connected to the storage battery 60 installed in the model line 50 and the power line to receive power from the storage battery 60.

As shown in FIG. 3, the center of gravity change device 40 includes a ball screw 42 placed on a base 41 having a flat bottom surface, and a weight screw 43 mounted in a detachable state. The moving part 44 which reciprocates along 42, and the motor 45 which drives the ball 44 by moving the moving part 44 are comprised. That is, the center of gravity change device 40 operates the motor 45 when the center of gravity change command of the radio controller 30 moves the moving part 44 by a predetermined distance, and thus the weight weight 43. By moving the center of gravity of the model line 50 is to change automatically.

On the other hand, the weight weight 43 is mounted to the moving part 44 by the weight calculated in advance so as to satisfy the draft condition of the model ship 50. That is, the weight of the model ship 50 (in this case, the weight of the model ship 50 is a concept including the weight of the present invention) is subtracted from the drainage amount corresponding to the draft condition of the model ship 50, and the weight is added as much as the weight. After calculating whether to be loaded more on the model line 50, the weight of the weight portion 43 of the portion of the calculated weight weight is mounted on the moving part (44). The remaining weight not mounted to the moving part 44 is installed in the model ship 50. The weight of the weight weight 43 mounted on the moving part 44 is a value that can vary each time for each model test or model ship 50.

On the other hand, the weight weight 43 is installed in the moving part 44, the weight of the case may be considerably outgoing in this case, in this case the moving part 44 ball screw 42 when moving due to the weight of the weight weight 43 Tilt or shake on the screen may occur. Therefore, it is preferable to provide an LM guide 46 supporting the moving parts 44 on both sides of the ball screw 42 so that the moving parts 44 can stably move in preparation for such a case (FIG. 3).

In FIG. 3, the center of gravity change device 40 is a one-axis structure (a structure in which the moving portion 44 reciprocates only in one direction along one ball screw 42) and is not a two-axis structure. This is because when the center changer 40 is manufactured in a two-axis structure, the size thereof becomes so large that it may be very difficult to arrange the center of gravity changer 40 in a space in the narrow model line 50.

Thus, the present invention is to produce the two center of gravity change device 40 of the single-axis structure to increase the space utilization of the model ship 50, placed in the appropriate space in the model ship 50 and accordingly the model ship 50 The width direction or the longitudinal direction of the center of gravity of the bar was to be changed, in this case the center of gravity change device 40, as shown in Figure 2, is installed in the width direction of the model line 50 is model line 50 The longitudinal weight center changing device 40a and the longitudinal weight center changing device 40a are installed in the longitudinal direction of the model ship 50 to change the position of the center of gravity weight of the model ship 50. 40b has a structure that works in pairs.

In this case, the widthwise center of gravity change device 40a is installed in a direction perpendicular to the center line of the model line 50, and the lengthwise center of gravity change device 40b is horizontal to the center line of the model line 50. Direction is installed. Therefore, the widthwise weight center changing device 40a changes only the widthwise weight center position of the model line 50 according to the movement of the weight weight 43, and the lengthwise weighting center changing device 40b is the weight weight 43 Only the longitudinal center of gravity position of the model line 50 is changed according to the movement.

At this time, the radio controller 30 issues a weight center change command to only one of the width direction weight center change device 40a and the lengthwise weight center change device 40b or the width direction weight center change device 40a. It is possible to issue the center of gravity change command simultaneously to both and the longitudinal center of gravity change device 40b. Therefore, when the radio controller 30 issues the center of gravity change command to only one of the widthwise center of gravity changing device 40a and the longitudinal weight center changing device 40b, the model line 50 has a width direction and a length. The inclination (draft) is changed only in one of the directions, and the radio control device 30 simultaneously centers the weight with respect to both the widthwise weight changing device 40a and the longitudinal weight changing device 40b. In the case of giving a change command, the model ship 50 is inclined (draft) in both the width direction and the longitudinal direction.

Hereinafter, a process of matching the draft condition of the model ship 50 using the present invention during the model test will be described.

First, how much weight is achieved through the difference between the drainage amount corresponding to the draft condition of the model ship 50 and the weight of the model ship 50 (in this case, the weight of the model ship 50 is a concept including the weight of the present invention). Calculate whether the weight should be further loaded on the model ship 50, and after installing the present invention on the model ship, the weight weight 43 of some of the calculated amount of weight weight is mounted on the moving part 44 and the rest It is installed inside the model ship 50. In this state, when the model ship 50 floats in the towing tank, the present invention works as soon as possible, and the operation process is as follows.

The draft measurement apparatus 10 measures the draft of the model ship 50 and transmits the measured draft value to the radio transceiver 20. → The radio transmitter / receiver 20 transmits the measurement draft value of the draft measurement apparatus 10 to the radio controller 30. → The radio controller 30 generates a weight center change command when the measured draft value of the draft measurement apparatus 10 is different from the preset calculated draft value. → The radio transmitter / receiver 20 receives the center of gravity change command of the radio controller 30 and transmits it to the center of gravity change device 40. → The center of gravity change device 40 automatically changes the position of the center of gravity of the model line 50 through the linear reciprocating movement of the weight 43.

In this case, if the moving speed of the weight weight 43 is sufficiently low, there is an advantage that can change the draft of the model ship 50 while maintaining the equilibrium state without shaking the model ship 50. As a result, according to the present invention, it is possible to quickly and accurately match the draft conditions of the model ship 50 through an automated system without changing the position of the weight weight 43 by hand in performing the model test.

The above description is merely illustrative of the technical idea of the present invention, and various modifications, changes, and substitutions may be made by those skilled in the art without departing from the essential characteristics of the present invention. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by the embodiments and the accompanying drawings. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

According to the present invention can be quickly and accurately match the draft conditions of the model ship through an automated system without changing the position of the weight weight manually in performing the model test of the ship, the present invention is widely used in shipbuilding and marine industry It is a technology that can realize its practical and economic value.

Claims

A draft measurement device installed on the model ship to measure the draft of the model ship and to transmit the measured draft value to the radio transceiver;

It is installed on the model ship and communicates wirelessly with the radio control device, but transmits the measured draft value of the draft measurement device to the radio control device, and receives the center of gravity change command from the radio control device and transmits it to the weight center change device. Device;

A wireless control device installed outside the model ship and generating a weight center change command when a measured draft value of the draft measurement apparatus is different from a preset calculated draft value;

A weight center changing device which is installed on a model ship and automatically changes the position of the center of gravity of the model ship through a linear reciprocating movement of the weight when there is a center of gravity change command of the radio control apparatus;

Including, model ship draft automatic control.
The method according to claim 1,

The draft measuring device is characterized in that installed on the bow and stern and the port and starboard of the model ship, model ship draft automatic control device.
The method according to claim 1,

The center of gravity change device,

A ball screw placed on a base having a flat bottom surface;

A moving part for mounting the weight in a detachable state and reciprocating along the ball screw;

A motor for driving the ball screw to move the moving part;

Characterized in that it comprises a, model ship draft automatic control device.
The method according to claim 3,

The center of gravity change device,

An LM guide supporting the moving parts on both sides of the ball screw so that the moving parts can be stably moved;

Characterized in that the draft further comprises, model line draft automatic control device.
The method according to claim 3,

The weight center changing device is installed in the width direction of the model ship, and the width direction weight changing device for changing the width center position of the model ship in the longitudinal direction and the longitudinal weight of the model ship installed in the longitudinal direction, changing the longitudinal weight center position of the model ship. Model line draft automatic control, characterized in that the centrifugal changer operates in pairs.
The method according to claim 5,

The width direction center of gravity change device is characterized in that installed in the vertical direction with respect to the center line of the model ship, model ship draft automatic control device.
The method according to claim 5,

The longitudinal weight center change device is characterized in that installed in the horizontal direction with respect to the center line of the model ship, model ship draft automatic control device.
The method according to claim 5,

The radio control apparatus issues a weight center change command to only one of the width direction weight center change device and the longitudinal weight center change device, or to both the width direction weight center change device and the longitudinal weight center change device. A model ship draft automatic control, characterized in that to issue a change of center of gravity at the same time.