NL2024176B1 - Photoelectric composite seismometer and detection system - Google Patents
Photoelectric composite seismometer and detection system Download PDFInfo
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- NL2024176B1 NL2024176B1 NL2024176A NL2024176A NL2024176B1 NL 2024176 B1 NL2024176 B1 NL 2024176B1 NL 2024176 A NL2024176 A NL 2024176A NL 2024176 A NL2024176 A NL 2024176A NL 2024176 B1 NL2024176 B1 NL 2024176B1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/18—Receiving elements, e.g. seismometer, geophone or torque detectors, for localised single point measurements
- G01V1/181—Geophones
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/22—Transmitting seismic signals to recording or processing apparatus
- G01V1/226—Optoseismic systems
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- General Life Sciences & Earth Sciences (AREA)
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Abstract
The present invention relates to the technical field of seismic detection, and specifically discloses a photoelectric composite seismometer, comprising a shell, a fiber detection component and a piezoelectric detection component. The fiber detection component comprises a first compliant cylinder and a second compliant cylinder which are arranged on a coaxial line, a first fiber fixedly twined on the first compliant cylinder clockwise, and a second fiber fixedly twined on the second compliant cylinder counterclockwise. The piezoelectric detection component is positioned between a lower end surface of the first compliant cylinder and an upper end surface of the second compliant cylinder, and comprises a detecting substrate, a first piezoelectric piece fixedly arranged on an upper surface of the detecting substrate, a second piezoelectric piece fixedly arranged on a lower surface of the detecting substrate, and an electrical signal transmission line electrically connected with the first piezoelectric piece and the second piezoelectric piece. The photoelectric composite seismometer of the present invention can obtain actual parameters of Vibration signals more accurately through combination with simultaneous measurement of seismic waves by the fiber detection component and the piezoelectric detection component, and has higher accuracy and reliability.
Description
Photoelectric composite seismometer and detection system
The present invention is proposed based on a Chinese patent application with application number of 201910488689.X and application date of June 06, 2019, and claims the priority of the Chinese patent application, the disclosures of which are hereby incorporated by reference.
Technical Field
The present invention relates to the technical field of seismic detection, and particularly relates to a photoelectric composite seismometer and a detection system.
Background
Seismic exploration is currently one of the most frequently used methods of petroleum exploration and physical exploration of underground coal mines, and mainly uses vibration signals generated by an artificial seismic source in the stratum to place seismometers in different positions from the seismic source to collect the vibration signals and then to conduct corresponding data processing on the signals.
The seismometers are frequently-used vibration sensors for seismic exploration. As the front-end equipment for signal reception and collection, the seismometers have characteristic parameters which directly affect the accuracy of collection results of seismic data. The existing seismometers are mostly electromagnetic seismometers. The electromagnetic seismometers have the properties of strong resistance to external interference, short response time and strong linearity. The acceleration equivalent noise of the existing electrical seismometers or seismographs is generally below pg-Hz-1/2 or even ng-Hz-1/2. The electromagnetic seismometers have the disadvantages that continuous power supply is required during measurement and the electromagnetic seismometers are difficult to be used in harsh monitoring environments. The existing seismometers also include fiber seismometers. The fiber seismometers can make up for the disadvantages of the electromagnetic seismometers, but the measurement range of the fiber seismometers is 5-800 Hz, which is impossible to measure the vibration of rock burst (frequency: 0-10 Hz).
Summary
AO 19.11.1075 NL
In view of the technical problems in the prior art, the present invention provides a photoelectric composite seismometer.
A photoelectric composite seismometer comprises a shell, a fiber detection component installed in the shell, and a piezoelectric detection component, wherein the fiber detection component comprises a first compliant cylinder and a second compliant cylinder which are arranged on a coaxial line, a first fiber fixedly twined on the first compliant cylinder clockwise, and a second fiber fixedly twined on the second compliant cylinder counterclockwise; one end of the first fiber and one end of the second fiber are connected with an external light source, and the other ends are provided with reflectors;
the piezoelectric detection component is positioned between a lower end surface of the first compliant cylinder and an upper end surface of the second compliant cylinder; the piezoelectric detection component comprises a detecting substrate, a first piezoelectric piece fixedly arranged on an upper surface of the detecting substrate, a second piezoelectric piece fixedly arranged on a lower surface of the detecting substrate, and an electrical signal transmission line electrically connected with the first piezoelectric piece and the second piezoelectric piece;
the fiber detection component detects a seismic signal and transmits a corresponding optical signal outwards through the first fiber and the second fiber; and the piezoelectric detection component detects the seismic signal and transmits a corresponding electrical signal outwards through the electrical signal transmission line.
Further, the first compliant cylinder and the second compliant cylinder are columnshaped silica gel cylinders.
Further, the photoelectric composite seismometer further comprises a first base and a second base which are used for limiting the motion ranges of the first compliant cylinder and the second compliant cylinder, wherein the first base is installed between the upper end surface of the first compliant cylinder and the shell;
the second base is installed between the lower end surface of the second compliant cylinder and the shell.
Further, the photoelectric composite seismometer further comprises a first spring and a second spring, wherein
AO 19.11.1075 NL the first spring is installed between the first base and the first compliant cylinder; the second spring is installed between the second base and the second compliant cylinder.
Further, the photoelectric composite seismometer further comprises protecting fillers filled among the shell, the side surface of the first compliant cylinder and the side surface of the second compliant cylinder.
Further, the first compliant cylinder, the piezoelectric detection component and the second compliant cylinder are provided with equal-radius signal transmission channels in an axial direction; and the first fiber, the second fiber and the electrical signal transmission line transmit the optical signal or the electrical signal outwards through the signal transmission channels.
Further, the first fiber and the second fiber are single mode fibers.
A seismic detection system comprises a photoelectric composite seismometer, a laser light source, a coupler connected between the laser light source and the photoelectric composite seismometer, an optical signal processing unit connected with the coupler, a signal conversion unit electrically connected with the photoelectric composite seismometer, and an upper computer electrically connected with the signal conversion unit, wherein the photoelectric composite seismometer is the above photoelectric composite seismometer;
the first fiber and the second fiber are connected with the coupler, and transmit the optical signal to the optical signal processing unit for conducting calculation processing; the electrical signal transmission line is electrically connected with the signal conversion unit; and the signal conversion unit converts the electrical signal and then transmits the electrical signal to the upper computer for conducting calculation processing.
Further, the detection system comprises at least two photoelectric composite seismometers.
Further, the optical signal processing unit and the upper computer process the optical signal and the electrical signal through wavelet packet denoising.
The photoelectric composite seismometer of the present embodiment can obtain actual parameters of vibration signals more accurately through combination with simultaneous measurement of seismic waves by the fiber detection component and the piezoelectric
AO 19.11.1075 NL detection component, and has higher accuracy and reliability. On one hand, the first fiber twined on the first compliant cylinder clockwise and the second fiber twined on the second compliant cylinder counterclockwise in the fiber detection component form a differential measurement relationship; and optical signals generated respectively by the first fiber and the second fiber are differenced to eliminate most of interference signals. Thus, the fiber detection component has reasonable structural design, and high accuracy of detection results. On the other hand, the piezoelectric detection component converts vibration information of an environment of the first compliant cylinder and the second compliant cylinder into electrical signals for collection by using the principle of piezoelectric effect based on the designed fiber detection component. As another measurement mode of the vibration information, the piezoelectric detection component can measure small deformation information, so that the response speed is high and the receiving capability to high frequency signals is strong.
Description of Drawings
To more clearly describe the technical solutions in the embodiments of the present invention or in prior art, the drawings required to be used in the description of the embodiments or the prior art will be simply presented below. Apparently, the drawings in the following description are merely some embodiments of the present invention, and for those ordinary skilled in the art, other drawings can also be obtained according to these drawings without contributing creative labor.
Fig. 1 is an internal structural schematic diagram of a photoelectric composite seismometer in the embodiments of the present invention;
Fig. 2 is a sectional view of a photoelectric composite seismometer in the embodiments of the present invention; and
Fig. 3 is a structural composition diagram of a seismic detection system in the embodiments of the present invention.
In the figures: 1-photoelectric composite seismometer; 101-shell; 102-fiber detection component; 1021-first compliant cylinder; 1022-second compliant cylinder; 1023-first fiber; 1024-second fiber; 103-piezoelectric detection component; 1031-detecting substrate; 1032-first piezoelectric piece; 1033-second piezoelectric piece; 1034electrical signal transmission line; 104-first base; 105-second base; 106-first spring; 107-second spring; 108-protecting filler; 109-signal transmission channel; 2-laser light
AO 19.11.1075 NL source; 3-coupler; 4-optical signal processing unit; 5-signal conversion unit; and 6upper computer.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and fully described below in combination with the drawings in the present invention. Apparently, the described embodiments are merely part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those ordinary skilled in the art without contributing creative labor will belong to the protection scope of the present invention. As shown in Fig. 1 and Fig. 2, a photoelectric composite seismometer 1 of the embodiments of the present invention comprises a shell 101, a fiber detection component 102 installed in the shell 101, and a piezoelectric detection component 103, wherein the fiber detection component 102 comprises a first compliant cylinder 1021 and a second compliant cylinder 1022 which are arranged on a coaxial line, a first fiber 1023 fixedly twined on the first compliant cylinder 1021 clockwise, and a second fiber 1024 fixedly twined on the second compliant cylinder 1022 counterclockwise; one end of the first fiber 1023 and one end of the second fiber 1024 are connected with an external light source, and the other ends are provided with reflectors; the piezoelectric detection component 103 is positioned between a lower end surface of the first compliant cylinder 1021 and an upper end surface of the second compliant cylinder 1022; the piezoelectric detection component 103 comprises a detecting substrate 1031, a first piezoelectric piece 1032 fixedly arranged on an upper surface of the detecting substrate 1031, a second piezoelectric piece 1033 fixedly arranged on a lower surface of the detecting substrate 1031, and an electrical signal transmission line 1034 electrically connected with the first piezoelectric piece 1032 and the second piezoelectric piece 1033; the fiber detection component 102 detects a seismic signal and transmits a corresponding optical signal outwards through the first fiber 1023 and the second fiber 1024; and the piezoelectric detection component 103 detects the seismic signal and transmits a corresponding electrical signal outwards through the electrical signal transmission line 1034.
AO 19.11.1075 NL
In the fiber detection component 102 in the present embodiment, the optical signal for detection is inputted from one end of the first fiber 1023 and one end of the second fiber 1024, and is returned through the reflectors arranged on the other ends of the first fiber 1023 and one end of the second fiber 1024. The returned optical signal is used as a measurement signal for next processing analysis. When the first compliant cylinder 1021 and the second compliant cylinder 1022 are relatively displaced under the action of seismic waves, the fiber detection component 102 in the present embodiment converts the change of a physical field into radial strain and longitudinal strain of the fibers. Thus, the optical signal transmitted outwards by the first fiber 1023 and the second fiber 1024 comprises measurement information corresponding to strain effects. The measurement information is analyzed and calculated to obtain a measurement result. The twining directions of the first fiber 1023 and the second fiber 1024 are opposite in the present embodiment. In a certain detection time period, the first compliant cylinder 1021 and the second compliant cylinder 1022 are subjected to the same force, but generate different optical signals in the process of converting into fiber strain. By outputting the optical signals of the first fiber 1023 and the second fiber 1024 and performing differential calculation, more accurate measurement results can be obtained, and the sensing sensitivity of the fiber detection component 102 is also increased.
In the present embodiment, the first compliant cylinder 1021 and the second compliant cylinder 1022 are used as transduction elements, and have the characteristic of low elasticity coefficient. Therefore, the fiber detection component 102 has low inherent frequency and is more suitable for detecting low frequency seismic waves. In the present embodiment, the first compliant cylinder 1021 and the second compliant cylinder 1022 can be made f silica gel material, and external shapes are designed into cylinders. In the present embodiment, the first fiber 1023 and the second fiber 1024 are single mode fibers with small curvature radius. In the present embodiment, the first fiber 1023 is twined on the first compliant cylinder 1021 clockwise and correspondingly, the second fiber 1024 is twined on the second compliant cylinder 1022 counterclockwise. The head end and the tail end of the first fiber 1023 or the second fiber 1024 are not specifically limited herein, but only the twining directions of the first fiber 1023 and the second fiber 1024 are opposite as indicated, and differential measurement can be realized. The specific twining mode can be designed by those
AO 19.11.1075 NL skilled in the art in practice, and identical working parameters should be selected as much as possible except that the twining directions are different, so as to ensure that a measurement error is minimized.
The piezoelectric detection component 103 in the present embodiment is positioned between the lower end surface of the first compliant cylinder 1021 and the upper end surface of the second compliant cylinder 1022. The first compliant cylinder 1021 and the upper end surface of the second compliant cylinder 1022 are separated in two cavities and respectively detected. The upper surface and the lower surface of the detecting substrate 1031 in the present embodiment are respectively fixedly provided with a first piezoelectric piece 1032 and a second piezoelectric piece 1033. The first compliant cylinder 1021 generates pressure on the first piezoelectric piece 1032 when displaced under the action of the seismic wave; and the second compliant cylinder 1022 generates pressure on the second piezoelectric piece 1033 when displaced under the action of the seismic wave. The first piezoelectric piece 1032 and the second piezoelectric piece 1033 output detection signals outwards through the electrical signal transmission line 1034. The present embodiment does not limit the specific product models of the first piezoelectric piece 1032 and the second piezoelectric piece 1033, and one or more groups of piezoelectric ceramic pieces may be selected to realize the design purpose of the present solution.
The photoelectric composite seismometer of the present embodiment can obtain actual parameters of vibration signals more accurately through combination with simultaneous measurement of seismic waves by the fiber detection component and the piezoelectric detection component, and has higher accuracy and reliability. On one hand, the first fiber twined on the first compliant cylinder clockwise and the second fiber twined on the second compliant cylinder counterclockwise in the fiber detection component form a differential measurement relationship; and optical signals generated respectively by the first fiber and the second fiber are differenced to eliminate most of interference signals. Thus, the fiber detection component has reasonable structural design, and high accuracy of detection results. On the other hand, the piezoelectric detection component converts vibration information of an environment of the first compliant cylinder and the second compliant cylinder into electrical signals for collection by using the principle of piezoelectric effect based on the designed fiber detection component. As another measurement mode of the vibration information, the piezoelectric detection component
AO 19.11.1075 NL can measure small deformation information, so that the response speed is high and the receiving capability to high frequency signals is strong.
Specifically, the photoelectric composite seismometer 1 in the present embodiment further comprises a first base 104 and a second base 105 which are used for limiting the motion ranges of the first compliant cylinder 1021 and the second compliant cylinder 1022 based on the previous embodiment, wherein the first base 104 is installed between the upper end surface of the first compliant cylinder 1021 and the shell 101; and the second base 105 is installed between the lower end surface of the second compliant cylinder 1022 and the shell 101. As shown in Fig. 1, the design purpose of the first base
104 and the second base 105 is to limit the motion ranges of the first compliant cylinder 1021 and the second compliant cylinder 1022. Because the first fiber 1023 and the second fiber 1024 enable the optical signals transmitted by the first fiber 1023 and the second fiber 1024 to generate optical phase change due to the radial or longitudinal deformation, the vibration amplitudes of the first compliant cylinder 1021 and the second compliant cylinder 1022 need to be limited in order to ensure that the measurement of the first fiber 1023 and the second fiber 1024 can be within a normal measurement range. The first base 104 and the second base 105 in the present embodiment can be made of metal, such as aluminum. The first base 104 and the second base 105 are fixed to the shell 101. Seal rings can be arranged between the shell 101 and the first base 104 and between the shell 101 and the second base 105, so as to ensure the sealing performance of devices inside the shell.
Specifically, as shown in Fig. 1 and Fig. 2, the photoelectric composite seismometer 1 in the present embodiment further comprises a first spring 106 and a second spring 107, wherein the first spring 106 is installed between the first base 104 and the first compliant cylinder 1021; and the second spring 107 is installed between the second base
105 and the second compliant cylinder 1022. Because the first spring 106 and the second spring 107 in the present embodiment respectively have elastic forces with the first compliant cylinder 1021 and the second compliant cylinder 1022 after the first compliant cylinder 1021 and the second compliant cylinder 1022 are displaced due to vibration, the first spring 106 enables the first compliant cylinder 1021 to return to the original position and the second spring 107 enables the second compliant cylinder 1022 to return to the original position, to improve subsequent detection accuracy.
AO 19.11.1075 NL
Specifically, as shown in Fig. 1 and Fig. 2, the photoelectric composite seismometer 1 in the present embodiment further comprises protecting fillers 108 filled among the shell 101, the side surface of the first compliant cylinder 1021 and the side surface of the second compliant cylinder 1022. The protecting fillers 108 in the present embodiment can have certain limiting and buffering effects on the moving space of the first compliant cylinder 1021 and the second compliant cylinder 1022, which can be realized generally by using polyurethane material.
Specifically, as shown in Fig. 1 and Fig. 2, the first compliant cylinder 1021, the piezoelectric detection component 103 and the second compliant cylinder 1022 in the present embodiment are provided with equal-radius signal transmission channels 109 in an axial direction; and the first fiber 1023, the second fiber 1024 and the electrical signal transmission line 1034 transmit the optical signal or the electrical signal outwards through the signal transmission channels 109. The transmission of the optical signal depends on the first fiber 1023 and the second fiber 1024. The transmission of the electrical signal depends on the electrical signal transmission line 1034. In order to make the structure of the entire photoelectric composite seismometer 1 more compact and beautiful, the signal transmission channels 109 are arranged in the axial direction in the present embodiment, and the first fiber 1023, the second fiber 1024 and the electrical signal transmission line 1034 realize transmission of the measurement information through the signal transmission channels 109.
Specifically, the first fiber 1023 and the second fiber 1024 in the embodiments of the present invention are single mode fibers. Compared with multi-mode fibers, the single mode fibers have the advantages of low chromatic dispersion and small loss. At the same time, the single mode fibers are extremely sensitive to external magnetic fields, vibration, acceleration and temperature, and have higher sensitivity in the application of the solution.
As shown in Fig. 3, another embodiment of the present invention is a seismic detection system which comprises a photoelectric composite seismometer 1, a laser light source 2, a coupler 3 connected between the laser light source 2 and the photoelectric composite seismometer 1, an optical signal processing unit 4 connected with the coupler 3, a signal conversion unit 5 electrically connected with the photoelectric composite seismometer 1, and an upper computer 6 electrically connected with the signal conversion unit 5, wherein the photoelectric composite seismometer 1 is the photoelectric composite
AO 19.11.1075 NL seismometer 1 in the above embodiment. The first fiber 1023 and the second fiber 1024 are connected with the coupler 3, and transmit the optical signal to the optical signal processing unit 4 for conducting calculation processing; the electrical signal transmission line 1034 is electrically connected with the signal conversion unit 5; and the signal conversion unit 5 converts the electrical signal and then transmits the electrical signal to the upper computer 6 for conducting calculation processing.
The specific working process of the seismic detection system in the present embodiment is: the laser light source 2 transmits a laser beam to the coupler 3. In the present embodiment, transmission of the optical signal between the laser light source 2 and the coupler 3 and between the coupler 3 and the optical signal processing unit 4 is realized through the fibers. The coupler 3 divides the laser beam into two beams which are respectively transmitted and measured by the first fiber 1023 and the second fiber 1024. The optical signal is reflected by the reflector when transmitted to the end of the first fiber 1023 or the second fiber 1024, and is reflected back according to an original transmission path. In the process of transmission of the optical signal, if the first fiber 1023 or the second fiber 1024 is deformed due to external vibration, the optical phase of the optical signal is affected. After the coupler 3 receives the optical signals returned by the first fiber 1023 and the second fiber 1024, two beams of measurement light are integrated and conveyed to the optical signal processing unit 4 for analysis and calculation. At the same time, the first piezoelectric piece 1032 and the second piezoelectric piece 1033 generate corresponding electrical signals after being pressed by the first compliant cylinder 1021 and the second compliant cylinder 1022, and the electrical signals are transmitted to the signal conversion unit 5 through the electrical signal transmission line 1034. The signal conversion unit 5 converts the electrical signals into digital signals and then the upper computer 6 conducts calculation and analysis. The optical signal processing unit 4 in the present embodiment has the function of converting the optical signals into the electrical signals or the digital signals, and can further conduct calculation and analysis on the converted signals. Preferably, in the present embodiment, the optical signal processing unit 4 is connected with the upper computer 6; the upper computer 6 conducts unified calculation and analysis on the measurement data corresponding to the optical signals and the measurement data corresponding to the electrical signals. The correlation of two measurement modes is obtained through the calculation and statistics of multiple groups of data, and then more
AO 19.11.1075 NL accurate measurement results are obtained.
Specifically, the detection system in the present embodiment comprises at least two photoelectric composite seismometers 1. In order to make the measurement results of the photoelectric composite seismometers 1 more accurate, the at least two photoelectric composite seismometers 1 arranged in the present embodiment conduct measurement simultaneously. The measured optical signals are uniformly analyzed and processed by the optical signal processing unit 4, and the measured electrical signals are processed by the upper computer 6. If more photoelectric composite seismometers 1 are arranged in the detection system of the present embodiment, the measured result is closer to a true value and has higher reliability.
Specifically, the optical signal processing unit 4 and the upper computer 6 in the present embodiment process the optical signals and the electrical signals through wavelet packet denoising. In the process of signal collection, the collected data must be doped with noise due to the influence of the surrounding environment. Therefore, before the signals are analyzed, it is necessary to conduct denoising processing on the signals to reduce the interference to restore real signals, so as to facilitate the feature extraction of the real signals. Specific steps of the wavelet packet denoising are as follows:
(1) determining a wavelet base through an entropy criterion;
(2) determining the number N of layers of signal decomposition;
(3) setting a threshold for a decomposition coefficient of each layer; and (4) reconstructing the processed signal to obtain a real signal.
When the signal is denoised, the selected wavelet base satisfies the following principles as much as possible: (1) symmetry, and (2) regularity, which can effectively reduce the possibility that the decomposed signal produces phase distortion, so that the reconstructed signal is real and smooth. Through a large number of experiments, when the sym6 wavelet is selected, a waveform obtained by reconstructing the decomposed signal can reflect an original signal as a whole. At the same time, the number of layers of wavelet packet decomposition is another important parameter, which determines the amount of calculation of the system during decomposition. As the number of decomposition layers is increased, the effect of denoising tends to be constant from strong, and the amount of calculation is increased exponentially with the increase of the number of decomposition layers. An optimal number of decomposition layers is acquired through tests. Wavelet packet denoising has a stronger capability to
AO 19.11.1075 NL decompose the signal. When decomposing, high frequency information and low frequency information of the signal can be obtained simultaneously, so that the reconstructed signal is closer to the original signal.
The present invention is further described above through specific embodiments.
However, it should be understood that the specific description herein shall not be interpreted as a limitation to the essence and scope of the present invention, and various modifications made to the above embodiments by those ordinary skilled in the art after reading the description belong to the protection scope of the present invention.
Claims (11)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910488689.XA CN110244348B (en) | 2019-06-06 | 2019-06-06 | Photoelectric combined type geophone and detecting system |
Publications (1)
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| NL2024176B1 true NL2024176B1 (en) | 2020-03-24 |
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| NL2024176A NL2024176B1 (en) | 2019-06-06 | 2019-11-07 | Photoelectric composite seismometer and detection system |
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| Country | Link |
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| CN (1) | CN110244348B (en) |
| NL (1) | NL2024176B1 (en) |
| WO (1) | WO2020243993A1 (en) |
| ZA (1) | ZA201906654B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112379414B (en) * | 2020-10-29 | 2024-02-02 | 安徽大学 | Optical fiber acceleration sensing probe with resonance suppression function and optical fiber microseismic monitoring sensor |
| CN112946317B (en) * | 2021-01-26 | 2022-12-13 | 哈尔滨工程大学 | Push-pull type optical fiber accelerometer with double-side double-reed supporting structure |
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| JPS56106122A (en) * | 1980-01-26 | 1981-08-24 | Sumitomo Electric Ind Ltd | Mechanical vibration detector |
| US4322829A (en) * | 1980-09-11 | 1982-03-30 | Dynamic Systems, Inc. | Fiber optic accelerometer and method of measuring inertial force |
| NO313605B1 (en) * | 1999-12-13 | 2002-10-28 | Optoplan As | Method and system for calibrating a conversion unit in a fiber optic sensor head |
| CN2599600Y (en) * | 2003-01-28 | 2004-01-14 | 天津大学 | Paravariable column body all optical fibre two optical path acceleration seismic detector |
| CN201155991Y (en) * | 2007-12-20 | 2008-11-26 | 武汉理工大学 | Optical fibre grating acceleration sensor |
| JP5300077B2 (en) * | 2009-10-15 | 2013-09-25 | 日鐵住金溶接工業株式会社 | Sensor and seismometer using the sensor |
| CN202133785U (en) * | 2011-07-12 | 2012-02-01 | 中国科学院半导体研究所 | Optical fiber detector |
| CN102927914B (en) * | 2012-10-10 | 2015-08-12 | 哈尔滨工程大学 | A kind of ultra-short baseline paravariable column body structured optical fiber displacement transducer and fibre strain instrument |
| CN102927912B (en) * | 2012-10-10 | 2015-05-27 | 哈尔滨工程大学 | Push-pull optical fiber displacement sensor with compliant cylinder structure and optical fiber strain gauge |
| CN104237934A (en) * | 2014-09-29 | 2014-12-24 | 中国地质大学 | Differential piezoelectric digital geophone |
| CN104749615B (en) * | 2015-03-18 | 2017-06-30 | 中南大学 | A kind of seismic prospecting or vibration test wave detector |
| CN105158507A (en) * | 2015-06-23 | 2015-12-16 | 中国电子科技集团公司第二十三研究所 | Fiber grating acceleration sensor and manufacturing method thereof |
| CN106291668A (en) * | 2016-07-25 | 2017-01-04 | 西安石油大学 | Micro logging/wave speed logging piezoelectricity system for acquiring seismic data |
| CN206523645U (en) * | 2017-02-17 | 2017-09-26 | 珠海任驰光电科技有限公司 | A kind of optical fiber detector for structure of being shaken with laterally limit |
| FR3069661A1 (en) * | 2017-07-27 | 2019-02-01 | Thales | DEVICE FOR TEMPERATURE COMPENSATION AND ELECTRO-OPTICAL TRANSPONDER USING SUCH A DEVICE |
| CN108627869A (en) * | 2018-07-10 | 2018-10-09 | 湖北文索光电科技有限公司 | Differential match lattice Neck fiber optic interferometric senses geophone |
| CN109143325B (en) * | 2018-09-29 | 2024-05-21 | 山东蓝海可燃冰勘探开发研究院有限公司 | Submarine four-component node seismic instrument system and submarine seismic data acquisition method |
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2019
- 2019-06-06 CN CN201910488689.XA patent/CN110244348B/en active Active
- 2019-06-18 WO PCT/CN2019/091794 patent/WO2020243993A1/en active Application Filing
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| ZA201906654B (en) | 2020-05-27 |
| CN110244348B (en) | 2021-04-02 |
| WO2020243993A1 (en) | 2020-12-10 |
| CN110244348A (en) | 2019-09-17 |
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