Fiber bragg grating seabed vibration signal measuring system
A fiber grating and vibration signal technology, applied in measuring devices, geophysical measurements, seismic signal receivers, etc., can solve the problems of complex internal wiring and large size, and achieve good sealing effect, small size, and easy manufacturing
Active Publication Date: 2022-03-22
武汉理工大学三亚科教创新园
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Problems solved by technology
The outer frame of the current popular submarine node observer has the problem of large size and complicated internal wiring.
Method used
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[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0026] see figure 1 with figure 2 , the embodiment of the present invention comprises outer frame structure, sealed door, acceleration sensor 12, fiber optic gyroscope 13, demodulator 16, thermoelectric conversion device 15, lithium battery pack 14; Eight threaded joints 10; the seal between the outer frame structure and the sealed door is provided with a card slot 9, and the sealing can be completed by applying sealant to the card slot 9 during installation, and the seal is simple and effective. The outer frame structure is made of stainless steel as a whole, and the cost is low.
[0027] see image 3 , the outer frame structure includes an upper layer and a lower layer, a splint 2 is arranged between the upper layer and the lower layer, a groove 3 is provided in the middle of the splint 2, and the groove 3 runs through the splin...
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According to the fiber bragg grating seabed vibration signal measurement system provided by the invention, by adopting a stepped positioning mode, the measurement error is effectively reduced, the structure is simple, the size is small, the cost is low, the installation is convenient, the manufacturing is easy, the repeated use is realized, and the working efficiency is improved; the outer frame framework adopts an upper and lower double-layer structure, the inner volume of the framework is fully utilized, and the overall size of the system is effectively reduced; a clamping groove sealing mode is adopted for the outer frame framework, the sealing effect is good, and the device is suitable for the marine environment; the low-frequency FBG three-dimensional acceleration sensor is used for measuring seabed vibration signals, the fiber bragg grating gyroscope is used for correcting the measurement direction of the low-frequency FBG three-dimensional acceleration sensor, and the functions of accurately collecting the vibration signals in complex occasions and transmitting the vibration signals in a long distance are achieved. The TEG thermoelectric module is installed in the part with the large temperature difference of the device, so that the temperature difference between the interior and the exterior of the device is converted into a power source through the TEG thermoelectric module, and the cruising ability of the device is improved.
Description
technical field [0001] The invention belongs to the technical field of fiber grating sensing and monitoring, and in particular relates to a fiber grating seabed vibration signal measurement system. Background technique [0002] The optical fiber grating seabed vibration signal measurement sensor is an underwater seismic monitoring system based on optical fiber sensing technology and optoelectronic technology. It has the advantages of high sensitivity, anti-electromagnetic interference, anti-radiation, and can realize underwater passive detection. It is an important direction for the development of submarine node observers and plays an important role in the military field. [0003] At present, most of the outer frames of submarine node observers use electrical sensors as sensing units, which are more susceptible to interference than fiber grating sensors. The outer frame structure of the current popular submarine node observers has the problems of large size and complicated ...
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IPC IPC(8): G01V1/18G01V1/38
CPCG01V1/189G01V1/38G01V2210/1427Y02E60/10
Inventor 梁磊徐其伟唐浩冕杜尚明宋力勰
Owner 武汉理工大学三亚科教创新园