A method for installing a ship's electric compass bearing sub-compass.

Abstract

This invention discloses a method for installing a ship's electric compass azimuth sub-compass. The method specifically includes the following steps: S1, determining a reference point on the ship's bow and stern centerlines; S2, measuring the angle between the lines connecting the center points of the installation positions of the port and starboard azimuth sub-compasses to the reference point on the ship's bow and stern centerlines; S3, installing the starboard and port azimuth sub-compasses, placing the starboard azimuth sub-compass in its installation position with the dial indicating 0°, and placing the port azimuth sub-compass in its installation position with the dial indicating 0°. This invention reduces on-site construction difficulty and shortens the installation and commissioning cycle by determining a reference point on the ship's mid-section baseline and then using an azimuth ring to correct the installation error of the sub-compass based on the measured angle.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding technology, specifically relating to a method for installing a ship's electric compass azimuth subcompass. Background Technology

[0002] A gyrocompass, also known as an electro-optical compass, is a directional instrument that utilizes the basic characteristics of a gyroscope and the Earth's rotation. It provides a true north reference and is used in ship navigation to determine course and the bearing of landmarks, making it an important nautical instrument. The gyrocompass with its sub-display mounted on the bow-stern centerline of the forecourt is called the heading compass, while those mounted on either side of the bow are called the bearing compasses.

[0003] To ensure navigational safety and improve accuracy, it is essential to correct the installation error of the azimuth compass. According to the requirements of the national standard GB / T 3471-1995, the installation baseline (0°-180° scale lines on the compass dial) of the azimuth compass installed on both sides should be parallel to the mid-longitudinal section of the ship (fore and stern center lines), and the deviation should not exceed ±0.5°.

[0004] However, during shipbuilding, it was found that due to the lack of professional measuring tools and installation verification methods, correcting installation errors of the compass, especially the azimuth compass, was difficult. On-site construction personnel often relied on experience to make corrections or did not make any corrections at all. This significantly reduced the accuracy of the compass, rendering it ineffective. Therefore, how can the parallelism between the installation baseline of the azimuth compass and the longitudinal profile baseline in the bow and stern directions be controlled within a deviation range of ±0.5°, and how can this be guaranteed? Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method for installing a ship's azimuth subcompass. This invention finds a reference target on the ship's mid-longitudinal baseline, measures the angle between the line connecting the azimuth subcompass at the current design position and the reference target and the ship's mid-longitudinal baseline, and then uses an azimuth ring to correct the installation error of the subcompass based on the measured angle. This reduces the difficulty of on-site construction, shortens the installation and commissioning cycle, and can be widely applied to the installation of ship's azimuth subcompass.

[0006] To achieve the above-mentioned objectives, the technical solution provided by this invention patent is as follows:

[0007] A method for installing a ship's electric compass bearing sub-compass, the method specifically includes the following steps:

[0008] S1. Determine the reference point: Establish a reference point on the bow and stern centerline of the ship and mark the reference reference point on the reference point;

[0009] S2, measure the angle between the center line of the port side bearing compass installation position and the reference reference point, and measure the angle between the center line of the port side bearing compass installation position and the reference reference point, and measure the angle between the center line of the port side bearing compass installation position and the reference reference point.

[0010] S3, Installation of the starboard compass: Place the starboard compass in the installation position and ensure that the scale of the starboard compass indicates 0°.

[0011] S4. Set up the bearing ring on the starboard bearing compass of the ship and align it with the reference point for observation. Adjust the scale of the starboard bearing compass dial. After the starboard bearing compass is adjusted, fix the starboard bearing compass of the ship in place with mounting bolts.

[0012] S5, Port Side Compass Installation: Place the port side compass in the installation position and ensure that the port side compass dial indicates 0°.

[0013] S6. Set up the bearing ring on the port side of the ship's bearing compass and align it with the reference point for observation. Adjust the scale of the port side bearing compass dial. After the port side bearing compass is adjusted, fix the port side bearing compass in place with mounting bolts.

[0014] Furthermore, the reference point determined on the bow and stern centerline of the ship is the foremast, and the reference reference point marked on the reference point is the foremast anchor light at the highest point of the foremast.

[0015] Furthermore, the angle between the line connecting the center point of the starboard compass installation position and the reference point and the center line between the bow and stern of the vessel is 10°, and the angle between the line connecting the center point of the port side compass installation position and the reference point and the center line between the bow and stern of the vessel is 10°.

[0016] Furthermore, the observation of the starboard azimuth compass by installing the azimuth ring specifically involves rotating the starboard azimuth compass with the center of the azimuth compass installation position as the axis, so that the position of the reference point observed from the azimuth ring is at -10° on the azimuth compass scale, that is, 350° on the compass scale.

[0017] Furthermore, the observation of the port side azimuth compass installation azimuth ring specifically involves rotating the port side azimuth compass with the center of the azimuth compass installation position as the axis, so that the position of the reference point observed from the azimuth ring is 10° on the azimuth compass scale, i.e., 10° on the compass scale.

[0018] Based on the above technical solution, the installation method of the ship's electric compass bearing sub-compass of this invention has achieved the following technical advantages through practical application:

[0019] 1. The present invention provides a method for installing a azimuth subcompass of a ship's electric gyrocompass. This method involves finding a reference target on the ship's mid-longitudinal baseline, measuring the angle between the line connecting the azimuth subcompass at the current design position and the reference target and the ship's mid-longitudinal baseline, and then using an azimuth ring to correct the installation error of the subcompass based on the measured angle. This method reduces the difficulty of on-site construction, shortens the installation and commissioning cycle, and can be widely applied to the installation of azimuth subcompasses of ship electric gyrocompasses. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the starboard compass angle measurement in the installation method of a ship's electric compass azimuth sub-compass of the present invention.

[0021] Figure 2 This is a schematic diagram of the compass disc in the installation method of a ship electric compass azimuth sub-compass of the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific examples shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0023] like Figure 1 and Figure 2 As shown, this invention pertains to a method for installing a ship's electric compass bearing sub-compass, which specifically includes the following steps:

[0024] S1. Determine the reference point: Determine the reference point on the bow and stern centerline 1 of the ship, and mark the reference reference point 2 on the reference point;

[0025] S2, measure the angle between the center point of the port side compass installation position and the reference reference point 2, and the angle between the bow and stern centerline 1 of the ship; measure the angle between the center point of the starboard side compass installation position and the reference reference point 2, and the angle between the bow and stern centerline 1 of the ship.

[0026] S3, Installation of the starboard compass: Place the starboard compass in the installation position and ensure that the scale of the starboard compass indicates 0°.

[0027] S4. Set up the bearing ring on the starboard bearing compass of the ship and align it with reference point 2 for observation. Adjust the scale of the starboard bearing compass dial. After the starboard bearing compass is adjusted, fix the starboard bearing compass of the ship in place with mounting bolts.

[0028] S5, Port Side Compass Installation: Place the port side compass in the installation position and ensure that the port side compass dial indicates 0°.

[0029] S6, set up the bearing ring on the port side of the ship's bearing compass and align it with reference point 2 for observation, and adjust the scale of the port side bearing compass dial; after the port side bearing compass is adjusted, fix the port side bearing compass in place with mounting bolts.

[0030] The reference point determined on the bow and stern centerline 1 of the ship is the foremast, and the reference reference point 2 marked on the reference point is the foremast anchor light at the highest point of the foremast; selecting the foremast anchor light at the highest point of the foremast as the reference reference point 2 facilitates the measurement and observation of angles, does not obstruct the line of sight, and improves the accuracy of measurement.

[0031] The angle between the center point of the starboard compass installation position and the reference point 2, and the angle between the center point of the port ...

[0032] The observation of the starboard azimuth compass installation azimuth ring is specifically carried out by rotating the starboard azimuth compass with the center of the azimuth compass installation position as the axis, so that the position of the reference point 2 observed from the azimuth ring is at -10° on the azimuth compass scale, that is, 350° on the compass scale.

[0033] The observation of the port side azimuth compass installation azimuth ring is specifically as follows: rotate the port side azimuth compass with the center of the azimuth compass installation position as the axis, so that the position of the reference point 2 observed from the azimuth ring is 10° on the azimuth compass scale, that is, 10° on the compass scale.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A method for installing a ship's electric compass bearing sub-compass, characterized in that, The method specifically includes the following steps: S1. Determine the reference point: Establish a reference point on the bow and stern centerline of the ship and mark the reference reference point on the reference point; The reference point determined on the bow and stern centerline of the ship is the foremast, and the reference reference point marked on the reference point is the foremast anchor light at the highest point of the foremast; S2, measure the angle between the center line of the port side bearing compass installation position and the reference reference point, and measure the angle between the center line of the port side bearing compass installation position and the reference reference point, and measure the angle between the center line of the port side bearing compass installation position and the reference reference point. The angle between the center point of the starboard compass installation position and the reference point is 10°, and the angle between the center line of the bow and stern of the ship is 10°. S3, Installation of the starboard compass: Place the starboard compass in the installation position and ensure that the scale of the starboard compass indicates 0°. S4. Set up the bearing ring on the starboard bearing compass of the ship and align it with the reference point for observation. Adjust the scale of the starboard bearing compass dial. After the starboard bearing compass is adjusted, fix the starboard bearing compass of the ship in place with mounting bolts. S5, Port Side Compass Installation: Place the port side compass in the installation position and ensure that the port side compass dial indicates 0°. S6. Set up the bearing ring on the port side of the ship's bearing compass and align it with the reference point for observation. Adjust the scale of the port side bearing compass dial. After the port side bearing compass is adjusted, fix the port side bearing compass in place with mounting bolts.

2. The method for installing a ship's electric compass bearing sub-compass according to claim 1, characterized in that, The observation of the starboard azimuth compass installation azimuth ring is specifically carried out by rotating the starboard azimuth compass with the center of the azimuth compass installation position as the axis, so that the position of the reference point observed from the azimuth ring is at -10° on the azimuth compass scale, that is, 350° on the compass scale.

3. The method for installing a ship's electric compass bearing sub-compass according to claim 1, characterized in that, The observation of the port side azimuth compass installation azimuth ring specifically involves rotating the port side azimuth compass with the center of the azimuth compass installation position as the axis, so that the position of the reference point observed from the azimuth ring is 10° on the azimuth compass scale, that is, 10° on the compass scale.

Images