Optical fiber grating type underwater dynamic torque measurement device and method

Abstract

The invention discloses fiber grating type underwater dynamic torque measuring equipment and a method. The measuring equipment comprises a transmission shaft system, underwater environmental simulation and control equipment and an external device, and the transmission shaft system is formed by a transmission shaft which comprises a fiber grating sensor attached on the surface and a fiber optic rotary joint connected with one end of the transmission shaft; the underwater environmental simulation and control equipment is formed by a water tank, a thermostatic water bath, a water filling pipe, a water pump, a solenoid valve, a pressure sensor and a temperature sensor; and the external device comprises a measurement and control box, a fiber grating sensing demodulator, a variable frequency motor and an adjustable load. A hardware circuit in the measurement and control box is connected with the fiber grating sensing demodulator, the pressure sensor and the temperature sensor. According to the invention, the fiber optic rotary joint which is a rotary micro-structure is adopted, a difficult problem that a signal of the fiber grating is not easy to be outputted under a transmission shaft rotary state; the device and the method of the invention provides means for ground-based simulation underwater dynamic torque measuring environment, and can help to improve the underwater dynamic torque measurement precision.

Description

technical field [0001] The invention relates to the field of underwater torque measurement, in particular to an experimental device and method for underwater environment optical fiber grating type dynamic torque measurement. Background technique [0002] Building a maritime power is of great significance to promoting sustainable and healthy economic development and safeguarding national sovereignty and security. [0003] Improving my country's shipbuilding technology capability and level is the key content of the marine strategy. The power system is the heart of a ship. Real-time and accurate monitoring of the power output by the power system has become an urgent problem to be solved, because according to the monitoring results, equipment failure prediction and diagnosis, abnormal vibration source identification, engine-propeller optimization matching, etc. can be performed. . The measurement of dynamic parameters under water is to measure the torque and rotational speed o...

AI Technical Summary

Problems solved by technology

[0008] The optical fiber rotary joint uses its own rotating structure to solve the problem that the optical signal is not easy to transmit between the fiber grating sensor and the fiber grating sensor demodulator under the condition of the transmission shaft rotation, and can realize the collimation of the optical fiber beam under the condition of the transmission shaft rotation Transmission, and has the advantages of anti-electromagnetic interference, large transmission bandwidth, non-contact transmission, no wear and long life

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