Fiber laser microseismic detector with combined structure
A fiber laser, fiber laser technology, used in seismic signal receivers, instruments, seismology, etc., can solve the problems of reducing high-frequency sensitivity, poor directivity, and reduced lateral cross sensitivity, and achieve the effect of low lateral cross sensitivity.
Active Publication Date: 2021-06-29
LASER RES INST OF SHANDONG ACAD OF SCI
View PDF12 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] The existing fiber laser detector mainly detects the acceleration signal of microseisms through the inertial sensitive structure composed of the elastic structure of the mass block. Generally, the frequency band is narrow, and the inertial sensitive structure composed of the elastic mass block structure has a competitive relationship between sensitivity and resonance frequency, which broadens the frequency band. Often at the cost of reducing the high-frequency sensitivity, the sensitivity of the broadband fiber laser detector is low, and the transverse cross-sensitivity is reduced, and the directivity becomes poor, which is not conducive to the positioning of the microseismic source
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
[0033] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0034] refer to figure 1 , a fiber laser microseismic detector with a combined structure provided by the present invention, including: a base structure 01, a mass block 02, an elastic diaphragm 03, a hinge structure 04, and a fiber laser 05.
[0035] refer to figure 1 , figure 2 , a fiber laser microseismic detector with a combined structure provided by the present invention, the base structure 01 is a slotted cuboid structure, preferably, it is processed from an Invar alloy with a very low coefficient of thermal expansion, in order to ensure process consistency , generally made of alloy plate wire cutting or laser cutting; refer to Figure 4 , a schematic diagram of the base structure of the fiber laser microseismic ...
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 relates to an optical fiber microseismic detector, and particularly discloses an optical fiber laser microseismic detector with a combined structure. The fiber laser microseismic detector includes a base structure, which is characterized in that: the base structure is a slotted cuboid structure, and an acceleration inertial sensor composed of a mass block and two elastic diaphragms is installed in the groove of the base structure. Structure, in which two elastic diaphragms are respectively installed on the upper and lower sides of the mass block; two hinge structures are installed symmetrically on the left and right sides of the mass block, each hinge structure connects the mass block and the base structure respectively, and the two hinge structures A fiber laser is installed on the top and connected to both ends of the fiber laser. The invention effectively widens the bandwidth of the fiber laser microseismic detector while ensuring high broadband sensitivity, limits the vibration direction of the mass block to the sensitive direction of the detector, reduces the acceleration response in the non-sensitive direction, and obtains lower lateral cross sensitivity.
Description
[0001] (1) Technical field [0002] The invention relates to an optical fiber microseismic detector, in particular to an optical fiber laser microseismic detector with a combined structure. [0003] (2) Background technology [0004] Microseisms are tiny vibrations produced by rock fractures or fluid disturbances. Microseisms in engineering production are caused by rock fractures caused by artificial production and construction, such as oil field fracturing microseisms, mine safety production microseisms, hydropower dam microseisms, etc. Naturally occurring microseisms are caused by changes in the natural stress field. Rock rupture or magma , Rainwater and other fluid disturbances cause changes in pore pressure. Monitoring, positioning, and analysis of microseismic signals can effectively infer the changes inside the rock mass, monitor the damage degree of large-scale geological engineering, predict the occurrence of disasters such as collapse, rockburst, water inrush, and roc...
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): G01H9/00G01V1/18
CPCG01H9/004G01V1/181
Inventor 张发祥姜劭栋王昌倪家升刘小会
Owner LASER RES INST OF SHANDONG ACAD OF SCI