Non-contact impeller speed monitoring method for offshore wind turbines based on underwater acoustic signals
A technology of underwater acoustic signals and offshore wind turbines, applied in the direction of linear/angular velocity measurement, velocity/acceleration/shock measurement, measuring devices, etc., can solve wind and wave noise, large tidal current noise, complex ocean background noise, and inconspicuous line spectrum frequency and other problems, to achieve the effect of low cost, simple and convenient installation and maintenance, and simple method
Active Publication Date: 2021-08-03
XIAMEN UNIV
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the background noise of the ocean is complex, and the noise of wind and waves, tidal currents, and distant ship noise are all relatively large. During the operation period, the underwater acoustic signal is often covered by the background noise of the ocean, and the line spectrum frequency is not obvious.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0034] The following embodiments will further illustrate the present invention in conjunction with the accompanying drawings.
[0035] figure 1 It is a schematic diagram of the principle of the embodiment of the present invention. First of all, when the offshore wind turbine starts to operate, the spherical hydrophone placed 50m away from the center of the offshore wind turbine pile foundation and at the depth of the middle layer of the water body is used to continuously collect the underwater acoustic signals of the wind turbine during operation. The schematic diagram of the instrument layout is as follows figure 2 shown. The received acoustic signal is subjected to pre-amplification, anti-aliasing filtering and analog-to-digital conversion to obtain a digital signal. image 3 It is a time-domain diagram of the underwater noise measured in an offshore wind farm during the operation period, Figure 4 is the corresponding time-frequency diagram. The data collected in real ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a non-contact impeller speed monitoring method for an offshore fan based on an underwater acoustic signal, and relates to the technical field of wind power. The hydrophone is used to collect the underwater noise of the offshore wind turbine near the wind turbine in real time during the operation period, and the line spectrum frequency of the underwater noise during the operation period is extracted by the stochastic resonance method, and then the frequency is used to invert the impeller speed of the wind turbine. Compared with the preset threshold value, when the impeller speed is found to be abnormal, the system will send out an alarm and stop the operation of the fan to ensure the safety of the fan. There is no need to install the monitoring instrument on the shaft of the fan or other firmware. This non-contact impeller speed monitoring method avoids the risk of wear and tear of the existing monitoring instrument due to long-term direct contact with the fan. Not only can it effectively monitor the speed of the impeller, but it can also track and monitor the real-time changes of underwater noise during the operation period of the offshore wind farm, and provide key parameters for the impact assessment of marine environmental noise. It has the advantages of simple method, low cost, and convenient layout.
Description
technical field [0001] The invention relates to the technical field of wind power, in particular to a non-contact impeller speed monitoring method of an offshore fan based on an underwater acoustic signal. Background technique [0002] With the depletion of fossil energy and the advocacy of the concept of sustainable development, green and clean wind power has developed rapidly. Compared with onshore wind energy, offshore wind energy has the advantages of high wind speed, high wind power density, and does not occupy onshore land, which makes the center of gravity of wind power generation shift from land to sea. In current wind power generators, variable-speed and variable-pitch wind power generators are commonly used. ([1] Chen Xuefeng, Guo Yanjie, Xu Caibin, Shang Hongbing. A Review of Wind Power Equipment Fault Diagnosis and Health Monitoring [J]. China Mechanical Engineering, 2020, 31(02): 175-189.) Under certain circumstances, the speed of the wind turbine can be adjus...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01P3/00
CPCG01P3/00
Inventor 王荣鑫许肖梅黄龙飞朱培斌刘后秀周阳亮
Owner XIAMEN UNIV