CN2594809Y - Optical fibre acceleration seismic detector - Google Patents
Optical fibre acceleration seismic detector Download PDFInfo
- Publication number
- CN2594809Y CN2594809Y CN 03200396 CN03200396U CN2594809Y CN 2594809 Y CN2594809 Y CN 2594809Y CN 03200396 CN03200396 CN 03200396 CN 03200396 U CN03200396 U CN 03200396U CN 2594809 Y CN2594809 Y CN 2594809Y
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- China
- Prior art keywords
- fiber
- arm
- optical fiber
- full
- utility
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The utility model discloses a full fiber seismic detector for acceleration, which belongs to the devices for detecting acceleration and seismic waves. The full fiber seismic detector comprises a full fiber Michelson interferometer is sealed in a metal casing, and a signal processing circuit which is composed of an amplifier, an oscillator, a multiplier and a filter, wherein, the full fiber Michelson interferometer is composed of a fiber reference arm, a fiber signal arm, a single-mode fiber reflecting mirror, a fiber coupler and a laser device. The utility model is characterized in that an input end of the fiber coupler is connected with the laser device, an output end is connected to a photoelectric converter, part of the fiber reference arm is wound on a piezoelectric ceramic, and the fiber signal arm is provided with a fiber-mass simple harmonic oscillator. The utility model has the advantage of wide frequency band of detection, and is suitable to work stably with high precision under strong electromagnetic interference.
Description
Technical field
The utility model relates to a kind of all-fiber optical acceleration geophone, belongs to earthquake wave detection device.
Background technology
Mostly adopt traditional electromagnetic detector in the field of measuring seismic event at present, this type of geophone sensitivity is not high, and frequency band is narrow, and is subject to electromagnetic interference (EMI).
Summary of the invention
The purpose of this utility model is to provide a kind of all-fiber optical acceleration geophone, and this seismoreceiver can not only resist electromagnetic interference (EMI), and can detect the seismic event of low-frequency range.
The technical scheme that its technical matters that solves the utility model adopts is: in metal shell, be sealed with full optical fiber Michelson interferometer and include amplifier, oscillator, multiplier, the signal processing circuit that wave filter constitutes.Described full optical fiber Michelson interferometer is by the optical fiber reference arm, the fiber-optic signal arm, the single-mode fiber catoptron, fiber coupler and laser instrument, the input end that it is characterized in that fiber coupler links to each other with laser instrument, output terminal links to each other with photoelectric commutator, and optical fiber reference arm part optical fiber is wrapped on the piezoelectric ceramics, and the fiber-optic signal arm has optical fiber-mass simple harmonic oscillator.
The beneficial effects of the utility model are that the detection electric band spread is adapted at high precision under the strong electromagnetic and stable following work.
Description of drawings
Fig. 1 is a structured flowchart of the present utility model.
1. laser instruments among the figure, 2. fiber coupler, 3. reference arm, 4. signal arm, 5. optical fiber-mass simple harmonic oscillator, 6. treatment circuit .7. photodetector.
Embodiment
In Fig. 1, laser instrument 1, photodetector 7, reference arm 3, signal arm 4 link to each other with fiber coupler 2, by treatment circuit 6 outputs.
In the embodiment shown in this figure, laser instrument 1 sends measuring light, optical fiber-mass simple harmonic oscillator 5 is added to vibration signal on the signal arm 4 of Michelson interferometer, the phase place of the light wave of propagating in the interferometer signal arm is modulated, the light wave that returns in light wave after the modulation and the reference arm produces in the coupled zone of coupling mechanism interferes, thereby the phase change of light wave is converted into the Strength Changes of light wave, receive by photodetector PIN again, light signal is converted to electric signal, utilize treatment circuit 6, after demodulation, detect acceleration signal to be measured.
Claims (1)
1. all-fiber optical acceleration geophone, in metal shell, be sealed with full optical fiber Michelson interferometer and include amplifier, oscillator, multiplier, the signal processing circuit that wave filter constitutes, described full optical fiber Michelson interferometer is by the optical fiber reference arm, the fiber-optic signal arm, single-mode fiber catoptron, fiber coupler and laser instrument, it is characterized in that: the input end of fiber coupler links to each other with laser instrument, output terminal links to each other with photoelectric commutator, and the part optical fiber of optical fiber reference arm is wrapped on the piezoelectric ceramics, and the fiber-optic signal arm has optical fiber-mass simple harmonic oscillator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03200396 CN2594809Y (en) | 2003-01-14 | 2003-01-14 | Optical fibre acceleration seismic detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03200396 CN2594809Y (en) | 2003-01-14 | 2003-01-14 | Optical fibre acceleration seismic detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2594809Y true CN2594809Y (en) | 2003-12-24 |
Family
ID=33752868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03200396 Expired - Fee Related CN2594809Y (en) | 2003-01-14 | 2003-01-14 | Optical fibre acceleration seismic detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2594809Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100406896C (en) * | 2006-06-29 | 2008-07-30 | 浙江大学 | High resolution micronano optical accelerometer |
| WO2018199786A1 (en) * | 2017-04-28 | 2018-11-01 | Inphotech Sp. Z O. O. | Measurement method of vibrations, especially of seismic type, and a device for the measurement of vibrations, especially of seismic type |
-
2003
- 2003-01-14 CN CN 03200396 patent/CN2594809Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100406896C (en) * | 2006-06-29 | 2008-07-30 | 浙江大学 | High resolution micronano optical accelerometer |
| WO2018199786A1 (en) * | 2017-04-28 | 2018-11-01 | Inphotech Sp. Z O. O. | Measurement method of vibrations, especially of seismic type, and a device for the measurement of vibrations, especially of seismic type |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |