Ship shaft horsepower measuring method based on counter-magnetostriction effect

Abstract

The invention discloses a ship shaft horsepower measuring method based on a counter-magnetostriction effect; the method comprises the following steps: 1, mounting a counter-magnetostriction torque testing device on a shafting; 2, gathering torque signals: using magnetic circuit calculation or test to obtain characteristic parameters in the testing device, and further obtaining a corresponding relation between an output voltage signal and the torque, wherein the characteristic parameters include an amplification factor, sensitivity, linearity and a measuring range; 3, using the counter-magnetostriction torque testing device to measure the voltage signal U and the sensitivity K, using a rotating speed sensor to measure a rotating speed signal n, and calculating the shafting power in real working. The method is simple in process, and can ensure the measuring precision.

Description

technical field [0001] The invention relates to shaft power measurement technology, in particular to a ship shaft power measurement method based on the inverse magnetostrictive effect. Background technique [0002] On-line monitoring of ship shaft power can judge whether the diesel engine is running well or not, and can also be used to judge the matching state between the ship, engine and propeller; combined with parameters such as fuel consumption and speed, it can provide technical support for the economical navigation of the ship. Therefore, it is of great significance to carry out the research on online testing technology of shaft power of marine diesel engine for improving the safety, reliability and economy of marine power system. [0003] In the process of shaft power test, the acquisition of rotational speed signal has been approaching maturity, but the acquisition of torque signal still needs to be further developed. The existing shaft power testing devices mainly ...

AI Technical Summary

Problems solved by technology

Steel string dynamometers and phase difference dynamometers have problems such as complex structure, high installation requirements, bulky volume, and difficulty in disassembly and assembly. Strain gauges require extremely strict bonding and wiring processes, so most of them are only suitable for measuring the uniform speed of the shaft system. Once the power under rotating or static conditions is applied to ships, there are often problems such as large deviations in measurement results and low measurement accuracy.

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