Current detecting device for ship stern shaft

Abstract

The invention belongs to the technical field of electric quantity detection, and particularly relates to a current detecting device for a ship stern shaft. A sensor circuit unit is fixedly mounted at the rear end of a bearing block of the ship stern shaft to be detected and is provided with a finished or self-designed current sensor; the sensor circuit unit is fixedly connected with the ship stern shaft by means of welding or through a sliding ring to realize smoothness of weak current; a data acquisition circuit unit is mounted in a space of a computer hardware case and respectively electrically communicated with a computer and the sensor circuit unit through communication interface circuits; and the current of the stern shaft passes through a propeller, returns to a hull through joints of a driving motor, a speed reducer and the bearing blocks, and then passes through the sensor circuit unit and the data acquisition circuit unit, so that data are processed and displayed by the aid of self-programming software installed in a computer. The current detecting device is simple in overall structure, reliable in principle, low in manufacturing cost, convenient in use and operation, accurate in data detection, wide in application range and applicable to detecting the current of stern shafts of various ships.

Description

Technical field: [0001] The invention belongs to the technical field of electrical quantity detection, and relates to a ship stern shaft current detection device, which is suitable for the current detection occasion of the ship stern shaft. By setting a current detection circuit and a signal processing and control circuit with a single-chip microcomputer as the core, it can be analyzed in related software With the support of the system, the real-time detection of the ship's stern shaft current is realized. Background technique: [0002] At present, low-end or high-end current-sensing circuits are commonly used to directly detect the current of the stern shaft of a ship. The small current-sensing resistors of the low-end current-sensing circuit are connected in series in the loop. The voltage difference at the end can get the current passing through. The disadvantage of this detection method is that the small resistance connected in series to the loop changes the inherent sys...

AI Technical Summary

Problems solved by technology

The cathodic protection effect of the propeller is closely related to the current flowing through the propeller, that is, the stern shaft. The current general-purpose current detection equipment can completely reflect the current change without changing the system state, which brings certain technical obstacles to the research on the protection state of the propeller.

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