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| Experimental Study on the Low Temperature Performance of Typical Marine Communication and Navigation Equipment |
| Received:April 03, 2023 Revised:June 15, 2023 |
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| DOI：10.7643/issn.1672-9242.2023.08.003 |
| KeyWord:communication and navigation equipment magnetic compass electronic compass low temperature test performance failure winterization electric heat tracing |
| Author | Institution |
| YANG Zong-yu |
China Ship Scientific Research Center, Jiangsu Wuxi , China |
| WANG Ying-hui |
China Ship Scientific Research Center, Jiangsu Wuxi , China |
| LI Ming-zheng |
China Ship Scientific Research Center, Jiangsu Wuxi , China |
| TIAN Yu-kui |
China Ship Scientific Research Center, Jiangsu Wuxi , China |
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| Abstract: |
| The work aims to establish an effective low temperature test and evaluation method to ensure the communication and navigation ability of ships sailing in ice area. A series of tests including pre-trial working test, –25 ℃ low temperature storage test, –20 ℃ low temperature working test and additional winterization measures were carried out for electronic compass and magnetic compass under the guidance of national military standard and ship standard. The tests successfully reproduced the performance failure mode of the electronic compass and magnetic compass in low temperature environment. The magnetic pointing stability of the magnetic compass was greatly weakened after low temperature test, and the maximum deviation of the pointing scale before and after the test could reach 3.3°. Likewise, the maximum pointing deviation of electronic compass after low temperature test reached 3.7° and the maximum current increased by 32.8%. However, the temperature tended to be stable during the whole test process and the scale value of the magnetic compass and electronic compass decreased after the insulation was carried out by shielding and heat tracing measures. According to the analysis, the increase of the mechanical damping of the internal components of magnetic compass and the change of the magnetic force of the self-correcting magnetic rod are the main reasons for the fluctuation of the positioning accuracy rate and the increase of the positioning error. The performance change of the internal electrical components of the electronic compass antenna is the main factor causing the variation of pointing scales. It is beneficial to improving the stability of electronic compass and magnetic compass in low temperature operation by taking some winterization measures to reduce the range of temperature change. |
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