CN106428419A - Ship model rolling attenuation remote test system and test method - Google Patents

Abstract

The invention discloses a remote test system for ship model roll attenuation, which includes a water pool and a ship model located in the water pool. A laser distance measuring device is installed at the center of gravity of the ship model, and the laser distance measuring device is connected with a transmitting end of a data transmission station. The transmitting end of the data transmission station is connected to the receiving end of the data transmission station, the receiving end of the data transmission station is connected to the computer, the computer is connected to the client through the remote control module, a camera is arranged above the laser distance measuring device, and the camera and the data transmission station transmit The terminal signal is connected, and a motor is also installed on the ship model, and the motor is connected with a heavy object. A remote test system for ship model roll attenuation of the present invention can provide remote test services for ships or ship model roll attenuation tests for units without laboratories, and test data, images, videos, etc. can be transmitted and fed back to the client in real time, solving the problem of In order to solve the rare problems of doing experiments, at the same time reduce unnecessary input costs, solve the problems of long time and long distance, and save manpower and material resources.

Description

A remote test system and test method for ship model roll attenuation

technical field

The invention relates to a remote test system and a test method for ship model roll attenuation, and belongs to the technical field of ship test.

Background technique

The rolling motion of a ship in sea wind and waves has a great impact on the safety and performance of the ship. Due to the severe rolling, the cargo in the hold may move, and even cause the ship to capsize. Rolling motions also reduce the ship's stability reserve and increase the risk of capsizing in wind and waves. In addition, rolling will also deteriorate the working conditions of offshore working ships and fishing boats, or even make them unable to work. Therefore, it is very important to judge and estimate the swaying situation of the ship in wind and waves as a design reference in the design stage. The ship model roll test is a good method to estimate the roll of the ship in the wind and waves, so the ship or ship model must be subjected to the roll test after the construction is completed.

Ship or ship model roll attenuation test requires places and equipment such as ship or ship model, experimental pool, inclination sensor, data acquisition and analysis system, because some units do not have enough funds to build experimental pools and purchase test instruments. Therefore, at present, some ship-related universities or units do not have test pools or related instruments and equipment are not perfect, but they do not have enough funds and sites to build test pools, so they need to rent pools and instruments and equipment from nearby relevant units for experiments. It needs a lot of manpower, material resources and financial resources, and is limited by time and space. There are mainly the following problems: one is: the distance between the two units may be in different cities; The third is: the whole process takes more time and the cycle is longer.

Contents of the invention

Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a remote test system and test method for ship model roll attenuation, which breaks through the limitations of the traditional test personnel who must go to the site to test and debug equipment test methods, Greatly improve the experimental efficiency.

Technical solution: In order to solve the above technical problems, a remote test system for ship model roll attenuation according to the present invention includes a water pool and a ship model located in the water pool. A laser distance measuring device is installed at the center of gravity of the ship model. The distance device is connected to the transmitter of the data transmission station, the transmitter of the data transmission station is connected to the receiver of the data transmission station for signals, the receiver of the data transmission station is connected to the computer, and the computer is connected to the client through the remote control module. A camera is provided, and the camera is connected with the signal of the transmitter of the data transmission station, and a motor is also installed on the ship model, and the motor is connected with a heavy object.

Preferably, the laser rangefinder includes a laser rangefinder and a base, and the laser rangefinder is installed on the ship model through the base.

As a preference, the motor is connected to the motor shaft, the motor shaft is provided with external threads, the weight is fixedly connected to the sleeve, the sleeve is movably connected with an inner ring, the inner ring is provided with an internal thread hole, and the motor shaft is threaded Connect with the inner ring.

A test method for the above-mentioned ship model roll attenuation remote test system, comprising the following steps:

(1) Install test equipment on the ship model and conduct joint debugging with the equipment on the shore;

(2) Put the ship model in the pool, adjust the ship model to the upright floating state, start the motor, push out the weight to the right, so that the ship model has a certain heel angle, until the weight is released, and it returns to the initial position. When the ship model produces rolling attenuation motion;

(3) When the ship starts to produce roll attenuation motion, the laser ranging device starts to collect data, and transmits the roll data to the transmitter of the data transmission station. The camera above the pool takes a video of the entire test process and sends it to the transmitter of the data transmission station. During the test, the laser ranging device measures the roll angle of the ship model, and the geometric relationship between the distance measured by the laser ranging device and the reference plane, that is, the laser ranging device on the vertical plane measures the distance from the horizontal reference plane. The distance L ₁ is recorded and recorded, and then the ship performs rolling motion. At each moment, the distance L ₂ measured by the laser rangefinder will be recorded. According to the angular displacement at each moment obtained by the data processing program, it is obtained Roll decay time, the specific formula is as follows:

(4) Data transmission The receiving end of the radio station receives the data image and transmits it to the computer, and the computer sends the processed data and image to the client through the remote control module.

Beneficial effect: compared with the prior art, the present invention has the following advantages:

1. The patent of this invention can provide remote test services for ships or ship model roll attenuation tests for units without laboratories. Test data, images, videos, etc. can be transmitted and fed back to the client in real time, which solves the rare problem of doing experiments. At the same time, unnecessary input costs are reduced, problems such as long time and distance are solved, and manpower and material resources are saved.

2. The remote test service test data of the patented ship (ship model) roll attenuation test of the present invention can be sent back to the client in real time, which breaks through the limitations of the traditional test personnel who must go to the site to test and debug equipment test methods, and greatly improves the test performance. efficiency.

3. The Internet-based ship (ship model) roll attenuation test remote test system proposed by the patent of the present invention realizes the remote information transmission of the test process through the Internet, which can make the sharing of test information easier. The invention patent can provide remote test services for enterprises, research institutes, etc., and can be applied to video teaching, scientific research and other fields, and has a wide audience.

4. The invention patent uses a laser rangefinder device to measure the ship's roll angle, which improves the error caused by the traditional inclination sensor being easily affected by temperature and surrounding environment, and improves the measurement accuracy.

Description of drawings

Fig. 1 is a system layout diagram of the present invention;

Figure 2 is a schematic diagram of roll angle measurement.

detailed description

As shown in Fig. 1 and Fig. 2, a kind of ship model roll attenuation remote test system of the present invention comprises a pool 12 and a ship model 1 located in the pool 12, and a laser ranging is installed at the center of gravity of the ship model 1 device, the laser distance measuring device is connected with the transmitting end 7 of the data transmission station, the transmitting end 7 of the data transmission station is connected with the receiving end 8 of the data transmitting station, the receiving end 8 of the data transmitting station is connected with the computer 9, and the computer 9 communicates with the computer through the remote control module 10 The client terminal 11 is connected, and the remote control module 10 is the PcAnywhere remote control software. A camera is arranged above the laser distance measuring device, and the camera is connected with a data transmission station transmitter 7 signal, and a motor 2 and a motor 2 are also installed on the ship model 1. Connected with the weight 3, the laser rangefinder includes a laser rangefinder 6 and a base 4, and the laser rangefinder 6 is installed on the ship model 1 through the base 4.

In the present invention, the motor 2 is connected to the motor shaft, the motor shaft is provided with external threads, the weight 3 is fixedly connected to the sleeve, the sleeve is movably connected with an inner ring, and the inner ring is provided with an internal thread hole, The inner ring structure may be a bearing provided with internal threads, and the motor shaft is connected to the inner ring through the threads. The laser rangefinder 6 is the model G1020107 laser rangefinder 6, which uses a secondary safety laser with a wavelength of 635.2μm, a range of 70m, a measurement accuracy of 1mm, and a measurement interval of 0.1s. The laser rangefinder 6 is used To measure the distance from the center of the laser rangefinder 6 to the roof of the test pool, that is, the reference plane.

In the present invention, the corresponding ship model 1 is selected, the stepper motor 2 is loaded along the longitudinal section direction of the ship model 1, and the weight of the heavy object 3 is selected according to the requirements of the initial roll angle, and the laser distance is measured along the longitudinal direction of the ship. Instrument 6. Wherein said laser range finder 6 is installed on the base 4, and the laser beam that it sends is vertical upwards perpendicular to the horizontal plane, and it is installed on the deck of the ship by the fixing bolt 5; Data transmission station receiving end 8 is installed on the bank, Connect computer 9, can carry out test after preparatory work is finished. The remote control software (PcAnywhere) is installed on the networked computer or mobile device (mobile phone, tablet, etc.), the client 11 enters the shore machine ID and password, controls the shore machine computer, operates the human-computer interaction interface, and displays the test data or images in real time through the interface. Optionally send test data to client 11.

A test method of the above-mentioned ship model 1 roll attenuation remote test system, comprising the following steps:

(1) Install test equipment on the ship model 1, and conduct joint debugging with the equipment on the shore;

(2) Put the ship model 1 into the pool, adjust the ship model 1 to the upright floating state, start the motor 2, and push the weight 3 to the right, so that the ship model 1 has a certain heel angle, until the weight 3 is released, making it Back to the initial position, the ship model 1 produces roll attenuation motion at this time;

(3) When the ship starts to produce roll attenuation motion, the laser distance measuring device starts to collect data, and transmits the roll data to the transmitter of the data transmission station 7, and the camera above the pool takes a video of the entire test process and sends it to the transmitter of the data transmission station 7. During the test, the laser ranging device measures the roll angle of the ship model 1, and the geometric relationship between the distance measured by the laser ranging device and the reference plane, that is, the distance measured by the laser ranging device on the vertical plane. The distance L ₁ of the horizontal reference plane is recorded, and then the ship performs rolling motion. At each moment, the distance L ₂ measured by the laser rangefinder 6 will be recorded, and the angle at each moment can be obtained according to the data processing program. Displacement, roll decay time is obtained, the specific formula is as follows:

(4) Data transmission station receiving terminal 8 receives data images and transmits them to computer 9 , and computer 9 sends processed data and images to client 11 through remote control module 10 .

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also possible. It should be regarded as the protection scope of the present invention.

Claims (4)

1. A ship model roll attenuation remote test system, characterized in that: comprise a pool and a ship model positioned in the pool, the center of gravity of the ship model is equipped with a laser distance measuring device, a laser distance measuring device and a data transmission station The transmitting end is connected, the transmitting end of the data transmission station is connected with the receiving end of the data transmitting station, the receiving end of the data transmitting station is connected with the computer, the computer is connected with the client through the remote control module, and a camera is arranged above the laser distance measuring device, and the camera is connected with the The data transmission radio transmitter is connected to the signal, and a motor is also installed on the ship model, and the motor is connected to the heavy object. 2. The ship model roll attenuation remote test system according to claim 1, characterized in that: the laser distance measuring device includes a laser distance meter and a base, and the laser distance meter is installed on the ship model through the base. 3. The ship model roll attenuation remote test system according to claim 1, characterized in that: the motor is connected to the motor shaft, the motor shaft is provided with external threads, the weight is fixedly connected to the sleeve, and the sleeve The inner movable connection has an inner ring, and the inner ring is provided with an inner threaded hole, and the motor shaft is connected with the inner ring through threads. 4. a test method of the ship model roll attenuation remote test system according to claim 1, is characterized in that, comprises the following steps: (1) Install test equipment on the ship model and conduct joint debugging with the equipment on the shore; (2) Put the ship model in the pool, adjust the ship model to the upright floating state, start the motor, push out the weight to the right, so that the ship model has a certain heel angle, until the weight is released, and it returns to the initial position. When the ship model produces rolling attenuation motion; (3) When the ship starts to produce roll attenuation motion, the laser ranging device starts to collect data, and transmits the roll data to the transmitter of the data transmission station. The camera above the pool takes a video of the entire test process and sends it to the transmitter of the data transmission station. During the test, the laser ranging device measures the roll angle of the ship model, and the geometric relationship between the distance measured by the laser ranging device and the reference plane, that is, the laser ranging device on the vertical plane measures the distance from the horizontal reference plane. The distance L ₁ is recorded and recorded, and then the ship performs rolling motion. At each moment, the distance L ₂ measured by the laser rangefinder will be recorded. According to the angular displacement at each moment obtained by the data processing program, it is obtained Roll decay time, the specific formula is as follows: $\mathrm{<span\; class="notranslate">\; \&alpha;</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; arccos</span>}\frac{{\mathrm{<span\; class="notranslate">\; L</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}{{\mathrm{<span\; class="notranslate">\; L</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}}<span\; class="notranslate">\; ;</span>$ (4) Data transmission The receiving end of the radio station receives the data image and transmits it to the computer, and the computer sends the processed data and image to the client through the remote control module.