Ship shaft horsepower measuring method based on counter-magnetostriction effect

A technology of inverse magnetostriction and measurement method, which is used in power measurement, measurement device, torque measurement and other directions, can solve the problems of large deviation of measurement results, low measurement accuracy, and high installation requirements, and achieves improved response speed and small size. , the effect of simple operation

Inactive Publication Date: 2018-08-07
WUHAN UNIV OF TECH
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  • Abstract
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  • Application Information

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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, s

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  • Ship shaft horsepower measuring method based on counter-magnetostriction effect
  • Ship shaft horsepower measuring method based on counter-magnetostriction effect
  • Ship shaft horsepower measuring method based on counter-magnetostriction effect

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0031] Such as Image 6 As shown, the present invention provides a kind of real-time online non-contact type shaft power measuring method, converts the torque signal that shafting produces into electrical signal by inverse magnetostrictive effect and indirectly measures the shaft power of shafting. Its specific steps are as follows:

[0032] S1: Select the magnetostrictive material with large magnetostriction coefficient and low saturation magnetic induction intensity as the sensitive material, paste or evenly spray it on the test surface with a length of about 10cm of the shaft system, and spray or paste the material along...

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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 ...

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Application Information

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IPC IPC(8): G01L3/24
CPCG01L3/24
Inventor 余永华董俊威
Owner WUHAN UNIV OF TECH
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