Search

CN-224230987-U - Gyro difference measuring device

CN224230987UCN 224230987 UCN224230987 UCN 224230987UCN-224230987-U

Abstract

The utility model discloses a gyro difference measuring device, which is characterized in that an optical azimuth instrument is placed on a gimbal mechanism, a rotating shaft of the optical azimuth instrument is connected with a rotating shaft of a rotary encoder, when the optical azimuth instrument is rotated to enable an sighting line of the optical azimuth instrument to be aligned with the center of a sun, the rotary encoder can be used for detecting the shipboard angle of the sun relative to a ship, and then a computer processing unit can be used for rapidly calculating the gyro difference according to the shipboard angle obtained from the rotary encoder, the azimuth of a sun gyro obtained from a gyro compass and navigation data obtained from satellite navigation equipment, so that the calculation precision of the gyro difference is effectively improved.

Inventors

  • SHEN MINYA

Assignees

  • 中船航海科技有限责任公司

Dates

Publication Date
20260512
Application Date
20250508

Claims (6)

  1. 1. A gyroscopic difference measuring device, characterized by comprising a gimbal mechanism, a rotary encoder (8) and a computer processing unit (4); The gimbal mechanism is used for placing the optical azimuth instrument (5), and a rotating shaft of the optical azimuth instrument (5) passes through the gimbal mechanism and then is connected with a rotating shaft of the rotary encoder (8); the rotary encoder (8) is used for detecting the shipboard angle of the sun relative to the ship, and the rotary encoder (8) is connected with the computer processing unit through a signal line; The computer processing unit (4) stores solar azimuth meter data, and is used for calculating a solar gyro azimuth according to the shipway heading signals received from the rotary encoder (8) and the shipway heading signals received from the gyro compass (6), obtaining a solar true azimuth by inquiring the solar azimuth meter according to navigation data received from the satellite navigation equipment (7), and then calculating a gyro difference according to the solar gyro azimuth and the solar true azimuth.
  2. 2. The gyro difference measuring apparatus according to claim 1, wherein the gimbal mechanism comprises a gimbal outer frame (1), a support table (2) fixed to the gimbal outer frame (1), and a through hole (3) for passing a rotation shaft of the optical azimuth meter is longitudinally provided through a center of the support table (2).
  3. 3. The gyroscopic difference measuring device according to claim 2, wherein the support table (2) is a circular table.
  4. 4. The gyroscopic difference measurement device according to claim 1, in which the rotary encoder (8) is a photoelectric encoder.
  5. 5. The gyroscopic difference measurement device of claim 4, wherein said optical encoder is an absolute optical encoder.
  6. 6. The gyroscopic difference measurement device of claim 1, wherein the navigational data comprises an observation date, a time, a ship position longitude and latitude.

Description

Gyro difference measuring device Technical Field The utility model relates to the technical field of ship navigation, in particular to a gyroscopic difference measuring device. Background Gyro compass is an important tool for measuring course and azimuth on navigation, and the accuracy of gyro compass is critical to navigation safety. The gyro difference deltag refers to the angle of deviation of the north end of the main axis of the gyro compass from true north, and the error can lead the heading output by the gyro compass to deviate from the true heading and change along with the change of the speed and the latitude. In the offshore navigation process, the gyroscopic difference needs to be measured by a special method frequently so as to ensure the navigation safety. At present, observing low-altitude solar azimuth to obtain the gyroscopic difference is the most basic method for measuring the gyroscopic difference by an astronomical method at sea. However, the method has higher requirements for operators, the operators need to read the dial readings in the azimuth compass from the azimuth reader while aligning the sighting line of the azimuth reader with the sun center, and the levelness of the azimuth compass is required to be continuously controlled so as to enable the horizontal bubble of the level on the azimuth reader to be positioned at the middle position, so that the operator can easily operate by three purposes, particularly when the ship sways violently, the operation difficulty is increased, larger errors are easy to generate, and the calculated gyroscopic difference has larger errors. Disclosure of Invention In view of the above, the present utility model provides a gyro difference measuring apparatus for solving the problem of large error in the measurement of gyro difference by astronomical method in the prior art. A gyro difference measuring device comprises a gimbal mechanism, a rotary encoder and a computer processing unit; the gimbal mechanism is used for placing an optical azimuth instrument, and a rotating shaft of the optical azimuth instrument passes through the gimbal mechanism and is connected with a rotating shaft of the rotary encoder; The rotary encoder is used for detecting the shipboard angle of the sun relative to the ship and is connected with the computer processing unit through a signal wire; The computer processing unit stores solar azimuth meter data, and is used for calculating a solar gyro azimuth according to the shipboard angle signal received from the rotary encoder and the ship heading signal received from the gyro compass, obtaining a solar true azimuth by inquiring the solar azimuth meter according to navigation data received from the satellite navigation equipment, and calculating a gyro difference according to the solar gyro azimuth and the solar true azimuth. Preferably, the gimbal mechanism comprises a gimbal outer support and a supporting table fixed on the gimbal outer support, wherein a through hole for enabling a rotating shaft of the optical azimuth instrument to pass through is longitudinally formed in the center of the supporting table. Preferably, the support table is a round table. Preferably, the rotary encoder is an optoelectronic encoder. Preferably, the photoelectric encoder is an absolute photoelectric encoder. Preferably, the navigation data comprises observation date, time and ship position longitude and latitude. The beneficial effects of the utility model are as follows: 1. According to the application, the optical azimuth instrument is placed on the gimbal mechanism, the rotating shaft of the optical azimuth instrument is connected with the rotating shaft of the rotary encoder, the rotary encoder can be used for detecting the angle of the sun relative to the ship when the optical azimuth instrument is rotated to align the sight line of the optical azimuth instrument with the sun center, and then the computer processing unit can rapidly calculate the gyro difference according to the angle obtained from the rotary encoder, the azimuth of the sun gyro obtained from the gyro compass and navigation data obtained from the satellite navigation equipment, so that the calculation precision of the gyro difference is effectively improved. 2. In the measuring process, an operator only needs to align the sight line of the optical azimuth meter with the center of the sun, and meanwhile, the photoelectric encoder can automatically output the accommodation angle of the sun relative to the ship by controlling the horizontal bubble of the level gauge on the optical azimuth meter to be positioned at the middle position, and the calculation processing unit can calculate and obtain the gyro azimuth GB of the sun according to the accommodation angle and the heading value, so that the operation difficulty is simplified, and the observation error caused by manual reading is avoided. 3. The solar true azimuth TB is obtained by a table look-up method according to th