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CN-117921356-B - Assembly method for ensuring interchangeability of azimuth compass

CN117921356BCN 117921356 BCN117921356 BCN 117921356BCN-117921356-B

Abstract

The invention discloses an assembly method for ensuring interchangeability of azimuth compass, which comprises the steps of determining connecting lines of supporting shafts on two sides of the azimuth compass by locking positions of a bracket of the azimuth compass, determining a central axis of the azimuth compass by observing a remote target angle through an optical azimuth meter, ensuring the uniformity of theta angles of each azimuth compass without processing high-precision pin holes, reducing the processing and assembly cost of the azimuth compass, and directly measuring and reading the angle of a remote object in the process of assembling the azimuth compass, thereby avoiding the condition of poor interchangeability caused by difficult accurate control of assembly gaps.

Inventors

  • SHEN MINYA
  • CHEN JIE
  • YANG ZIJIAN

Assignees

  • 中船航海科技有限责任公司

Dates

Publication Date
20260508
Application Date
20240111

Claims (6)

  1. 1. An assembly method for ensuring interchangeability of azimuth compass is characterized by comprising the following steps: s1, placing a compass support at any point A on the ground, mounting a standard azimuth compass on the compass support, and mounting an optical azimuth instrument at the center of the standard azimuth compass; S2, rotating the optical azimuth instrument and the compass support to enable a marking line in an eyepiece of the optical azimuth instrument to be always aligned with a target B with a fixed position at any distance, wherein a bottom marking line of the optical azimuth instrument is aligned with a certain scale value X of a broadside ring of a compass with a standard azimuth, at the moment, the position of the compass support is locked, and an included angle alpha between a connecting line of supporting shafts on two sides of the compass and an AB line is fixed; s3, taking down the standard azimuth compass from the compass support; s4, fixing the compass to be assembled on a compass support, wherein an upper cover part of the compass to be assembled is not fastened with a main part of the shell, and then installing an optical azimuth instrument in the center of the compass to be assembled; S5, rotating the optical azimuth instrument and the upper cover part of the to-be-assembled azimuth compass, enabling a bottom score line of the optical azimuth instrument to be aligned with a scale value X of the angle ring under the condition that a marking line in an eyepiece of the optical azimuth instrument is aligned with a target B, locking the upper cover part of the to-be-assembled azimuth compass with a main part of a shell, and fixing an included angle K between a central axis of the compass and an AB line of the compass, thereby ensuring that an included angle theta between the central axis of the compass and connecting lines of supporting shafts on two sides of the compass is fixed.
  2. 2. The assembling method for ensuring interchangeability of azimuth compass according to claim 1, wherein the specific steps of rotating the optical azimuth meter and the compass stand in step S2 are as follows: And rotating the optical azimuth instrument to enable the marking in the ocular to be aligned with a target B which is fixed at any position in a far place, observing whether the bottom marking of the optical azimuth instrument is aligned with a certain scale value X of the angle ring of the standard azimuth compass, and if not, rotating the compass support, wherein the compass support synchronously rotates with the standard azimuth compass until the bottom marking of the optical azimuth instrument is aligned with the scale value X of the angle ring of the standard azimuth compass, wherein the marking in the ocular of the optical azimuth instrument is always aligned with the target B in the rotating process of the compass support.
  3. 3. The method of assembling for ensuring interchangeability of azimuth compass according to claim 1 or 2, wherein said target B is a turret top or a lamp post.
  4. 4. The assembling method for ensuring interchangeability of azimuth compass according to claim 1, wherein the specific steps of fixing the azimuth compass to be assembled to the compass stand in step S4 are as follows: The main part of the casing of the compass in the direction to be assembled is fixed on the compass support, the upper cover part of the compass in the direction to be assembled is mounted on the main part of the casing, a plurality of screws are screwed on the fixed connection part of the upper cover part and the main part of the casing, and the screws are temporarily not fastened.
  5. 5. The assembling method for ensuring interchangeability of azimuth compass according to claim 1, wherein the specific steps of rotating the optical azimuth meter and the upper cover member of the azimuth compass to be assembled in step S5 are: And rotating the optical azimuth instrument to enable the marking in the ocular lens to be aligned with the target B, observing whether the bottom marking of the optical azimuth instrument is aligned with the scale value X of the angle bead at the moment, and rotating the upper cover part of the azimuth compass to be assembled until the bottom marking of the optical azimuth instrument is aligned with the scale value X of the angle bead if the bottom marking of the optical azimuth instrument is not aligned with the scale value X of the angle bead, wherein the marking in the ocular lens of the optical azimuth instrument is always aligned with the target B in the rotating process of the upper cover part.
  6. 6. The assembly method for ensuring interchangeability of azimuth compass according to claim 1, wherein the following relationship exists between the included angles α, K and θ: α+k+θ= 180 DEG or alpha-K+theta =180°.

Description

Assembly method for ensuring interchangeability of azimuth compass Technical Field The invention relates to the technical field of ship navigation, in particular to an assembly method for ensuring interchangeability of azimuth compass. Background The azimuth compass is generally arranged on two sides of a ship and is used for representing the course of the ship, and is matched with an optical azimuth instrument or an azimuth circle for use, so that the azimuth and the angle of a celestial body or a remote object can be measured. During actual installation, the azimuth compass is installed on the bracket through the supporting shafts on two sides, and the bracket is fixed on the decks on the left side and the right side. In the installation process, a connecting line (which can be regarded as a central axis of the azimuth compass and is the same as the following) of 0-180 degrees of the angle bead of the azimuth compass is calibrated by a certain method and is parallel to the bow-stern line of the ship. After the installation is completed, the parallelism between the central axis of the azimuth compass and the bow-stern line of the ship is not calibrated any more. The azimuth compass is constructed to be roughly divided into a main casing part and an upper cover part. The support shafts are mounted on the left and right sides of the main housing member, and the central axis may be led out from the side angle ring of the upper cover member. An included angle between the connecting line of the supporting shafts at two sides and the central axis is set as theta (the same applies below). In the assembling process of the azimuth compass, when the upper cover part is installed on the main part of the shell, in order to ensure the interchangeability of the azimuth compass, the theta angle of each azimuth compass needs to be kept consistent. Otherwise, after the azimuth compass is replaced for maintenance, maintenance and other reasons, as the connecting lines of the supporting shafts at the two sides are not on the same plane with the central axis, if assembly deviation exists between the main shell part and the upper cover part of the azimuth compass after replacement, the axis is not parallel to the bow and stern line of the ship any more, and errors can be generated in the measured azimuth angle and the measured angle of the celestial body or the object standard. Currently, in order to ensure interchangeability of compass in all directions, more than 2 positioning pins are generally adopted to ensure uniformity of angle θ, tolerance accuracy requirements of shape size and position size of pin holes are very high, and manufacturing cost of compass in all directions is increased. Disclosure of Invention In view of the above, the invention provides an assembly method for ensuring interchangeability of azimuth compass, which can ensure the theta angle consistency of each azimuth compass without processing high-precision pin holes, ensure the assembly precision of each azimuth compass and reduce the processing and assembly cost of the azimuth compass. An assembly method for ensuring interchangeability of azimuth compass comprises the following steps: s1, placing a compass support at any point A on the ground, mounting a standard azimuth compass on the compass support, and mounting an optical azimuth instrument at the center of the standard azimuth compass; S2, rotating the optical azimuth instrument and the compass support to enable a marking line in an eyepiece of the optical azimuth instrument to be always aligned with a target B with a fixed position at any distance, wherein a bottom marking line of the optical azimuth instrument is aligned with a certain scale value X of a broadside ring of a compass with a standard azimuth, at the moment, the position of the compass support is locked, and an included angle alpha between a connecting line of supporting shafts on two sides of the compass and an AB line is fixed; s3, taking down the standard azimuth compass from the compass support; s4, fixing the compass to be assembled on a compass support, wherein an upper cover part of the compass to be assembled is not fastened with a main part of the shell, and then installing an optical azimuth instrument in the center of the compass to be assembled; S5, rotating the optical azimuth instrument and the upper cover part of the to-be-assembled azimuth compass, enabling a bottom score line of the optical azimuth instrument to be aligned with a scale value X of the angle ring under the condition that a marking line in an eyepiece of the optical azimuth instrument is aligned with a target B, locking the upper cover part of the to-be-assembled azimuth compass with a main part of a shell, and fixing an included angle K between a central axis of the compass and an AB line of the compass, thereby ensuring that an included angle theta between the central axis of the compass and connecting lines of supporting shafts on two sides of the