As the strategic position of the oceans in the political, military, and economic fields is increasing and the mankind’s use of ocean space is constantly being strengthened, underwater unmanned equipment is of vital importance and embraces a wide range of prospects for application, which plays a vital role in modern maritime military strategy, and is a key factor in ensuring that an advantage is gained in the field of underwater warfare in the new era. Underwater unmanned equipment can perform tasks such as environmental monitoring, target detection, anti-submarine, and anti-mine warfare, and can also be used as a weapon platform and a support platform, with the characteristics of strong concealment and low cost, and can be fitted with an optional payload according to the type of mission. As an essential part of underwater unmanned equipment, depth sensor is responsible for completing the deployment depth of the equipment in the seawater or sailing depth measurement, and the seawater pressure signal is converted into an electrical signal sent to the fuzzing device or control system and other electrical components for decoding and calculation, in order to control the sailing depth, thus completing the measurement of the automatic adaptation range in different depths, so as to ensure that the accuracy and the effectiveness of the target to be measured, which performs a crucial function in the process of equipment action. Meanwhile, for some underwater equipment, especially weaponry, the internal space is compact, the structure is complex, and the integration is high, making disassembly extremely difficult. Long-term use and storage, for sensors, cause time drift, which requires recalibrating. However, when sensors undergo time drift during long-term use or storage and require recalibration, they can only be removed and sent back to the manufacturer for maintenance during major overhauls. This process is time-consuming, and the secondary assembly after disassembly poses safety risks, significantly impacting the equipment’s performance. This paper introduces a CAN bus depth sensor with the capability of online calibration without disassembly, enabling the product to be quickly calibrated online without returning to the factory. This enhances the equipment’s supportability and ensures its long-term stable operation.
Wu et al. (Thu,) studied this question.