CN110454227A - Auxiliary rescue system is listened in a kind of vibration based on optical fiber - Google Patents
Auxiliary rescue system is listened in a kind of vibration based on optical fiber Download PDFInfo
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- CN110454227A CN110454227A CN201810424807.6A CN201810424807A CN110454227A CN 110454227 A CN110454227 A CN 110454227A CN 201810424807 A CN201810424807 A CN 201810424807A CN 110454227 A CN110454227 A CN 110454227A
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- optical fiber
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F11/00—Rescue devices or other safety devices, e.g. safety chambers or escape ways
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
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- Health & Medical Sciences (AREA)
- Emergency Management (AREA)
- Pulmonology (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a kind of, and the audio reduction based on fiber-optic vibration assists rescue system, belongs to safety in production and accident rescue technical field, solves the problems such as prior art is poor to the dependence of electric system and anti-tampering ability, and rescue deviations are big.The principle of this system is: using optical fiber as sensor, light-pulse generator gets pulsed light into optical fiber, while equipment detects back rayleigh scattering light in pulse light incident side, analyzes light echo strength information.Optical fiber back rayleigh scattering regularity is extremely strong, and in the case where optical fiber does not have Vibration Condition, the back rayleigh scattering intensity of return is substantially stationary.Slight vibration information caused by personnel in the pit's activity or speech passes through fiber pass-back to ground, analysis system determines that vibration occurs position and carries out audio reduction according to the time for receiving this exceptional value, so that rescue command center understands personnel's accurate location and condition information to be rescued in time, reliable Information Assurance is provided for precisely rescue.
Description
Technical field
The present invention relates to fiber-optic vibration monitoring, Fibre Optical Sensor, audio reduction, safety in production and accident rescue technical fields.
Background technique
Coal is one of the main energy sources in China, and the exploitation of coal is mainly based on underground mining, and underground mine is raw
Operating environment complexity is produced, the security risk in production process is more, is often subject to top plate, gas, electromechanics, explosion, floods, fire
The disasters such as calamity, landslide cause casualties.How to become in the position of determining trapped person and status after the accident and rescues
The top priority helped.With the continuous development of science and technology, the existing location technology communication mode for trapped person has bluetooth
Technology, infrared technique, super wide frequency technology, WiFi technology, ZigBee technology etc..And there are blind areas, event for such location technology
The problems such as barrier rate is high, equipment is perishable, especially dependence of the equipment to electric power, is not available in the case where no electricity.
With the development of optical fiber technology, so that optical fiber is applied in many fields.Wherein, Fibre Optical Sensor is made with light
Have using optical fiber as the medium for transmitting tested sensitive information when in optical fiber local environment for the delivering path for being tested sensitive information
When vibration or sound cause fiber-optic vibration, the part of properties that light is transmitted in optical fiber will change, and module is acquired signal,
Judge the Rayleigh scattering light echo that fiber-optic vibration signal generates, so can analyze out occur the corresponding vibration information of vibration position with
And restore audio-frequency information.
Summary of the invention
The present invention to solve problems of the prior art, proposes a kind of audio reduction auxiliary based on fiber-optic vibration
Rescue system, comprising: host computer data analysis system is got to be calculated by slave computer data acquisition and analysis system preliminary analysis
Digital signal analyzed, and by client display system will analyze result show, can show positioning and audio-frequency information.
Wherein, the digital signal that above-mentioned slave computer data acquisition and analysis system preliminary analysis calculates is by digital signal
Processing (DSP) module obtains digital signal progress floating-point operation, and wherein digital signal is by analog-to-digital conversion (ADC) module by mould
Quasi- signal converts.
Wherein, above-mentioned analog signal is converted optical signal by photoelectric conversion (APD) module.Wherein APD and monitoring
Optical fiber is connected, and the Rayleigh scattering that fiber-optic vibration generates can make to form the electric signal with certain rule in APD, thus reaches photoelectricity
The transformation of signal.
Wherein, light wave, which enters before APD, also needs to filter the fiber optic telecommunications number using filtering Gaussian linear filter
Wave, wavelet noise remove the useless wave of the generations such as noise waves.
Wherein, above-mentioned optical fiber is the signal transmission medium as this system, mountable on the wall of down-hole pipe, when
It will lead to fiber-optic vibration when having sound or vibration, transmission of this system using Rayleigh scattering therein as signal is divided
Analysis.
Wherein, above-mentioned fiber entrance installs a laser and emits light wave into optical fiber, whenever having external sound or vibration
It is dynamic to lead to fiber-optic vibration, it changes so as to cause refractive index in optical fiber, the phase of back rayleigh scattering changes therewith, this
A little extraneous vibration information that carry enter APD processing.
Above scheme uses optical fibers as the signal transmission medium of system, is caused using Rayleigh scattering to vibration or sound
Fiber-optic vibration detected, fiber optic telecommunications number are restored with the vibration that the underground vibrating that can obtain the optical fiber or sound generate
Dynamic signal and audio signal.And optical fiber is inactive component, sound and vibration monitoring can be improved in not affected by environment or damage
Reliability and stability.The characteristic transmitted in a fiber using the Rayleigh scattering signal of reflection, and can realize and monitor over long distances.
Meanwhile this auxiliary rescue system is convenient for safeguarding, and it is at low cost, it can detecting real-time positioning.
Detailed description of the invention
Fig. 1 is the audio reduction auxiliary rescue system structure chart of fiber-optic vibration；
Fig. 2 is communication base station schematic network structure；
Fig. 3 is Audiotechnica process flow diagram.
Specific embodiment
In being described below, the present invention will be further described in conjunction with specific embodiments, so as to provide a thorough understanding of the present application, but this
Invention should not be limited by the examples.In other situations, the detailed description of apparatus, circuit and method is omitted, so as not to it is unnecessary
Details interfere the description of the present application.
Underground vibrating information of the present invention refers to and can result in the letter that optical fiber occurs vibration and generates Rayleigh scattering
Breath.Including tapping, personnel in the pit the vibrations of generations such as speaks and walks about, explodes.When accident occurs for underground, personnel to be rescued only are needed
It slightly to tap optical fiber or be described against the simple voice of optical fiber, it can be accurate using the vibration detection positioning method of optical fiber
It calculates optical fiber disturbance point and restores audio-frequency information, the information of personnel to be rescued can be obtained.
Fig. 1 is the audio reduction auxiliary rescue system structure chart of fiber-optic vibration of the invention, and this system includes optical fiber 1, divides
Beam device 2, light-pulse generator module 3, photoelectric conversion module 4, analog-to-digital conversion module 5, signal screening processing module 6, host computer data
Analysis system 7, client display system 8.Wherein, it in the settable passageway walls with mine of optical fiber 1, can be laid with a plurality of.And divide
Beam device 2, light-pulse generator module 3, photoelectric conversion module 4, analog-to-digital conversion module 5, signal screening processing module 6, host computer data
Analysis system 7, client display system 8 etc. are in monitoring room on the ground.Optical fiber 1 is connected with beam splitter 2；Beam splitter 2 divides
It is not connected with light-pulse generator module 3 and photoelectric conversion module 4；Photoelectric conversion module 4 is connected with analog-to-digital conversion module 5；Modulus turns
Mold changing block 5 is connected with signal screening processing module 6；Signal screening processing module 6 is connected with host computer data analysis system 7；On
Position machine data analysis system 7 is connected with client display system 8.
Existing communication base station network structure such as Fig. 2 passes through fiber optic communication with each single base station respectively by a central base station.Mirror
In underground mine distributed architecture, detection equipment deployment is as follows: detecting room and place apparatus are built in central base station position, communication is each
The optical fiber of a direction base station is connected to equipment, can detect the Vibration Condition of mine downhole optic fiber.
Optical fiber 1 is set in the passageway walls of mine, to detect the vibration information in Minepit environment.Optical fiber 1 can be used general
An optical fiber in logical communications optical cable makees sensing unit, carries out Distributed Multi vibration detecting.Its principle is to work as downhole personnel
When the vibration (such as walking about) of generation acts on communications optical cable, cause in optical cable that deformation occurs for fibre core, makes core length and refractive index
It changes, the phase of light in optical cable is caused to change.When light transmits in optical cable, since photon and fibre core lattice occur
Effect, constantly transmits Rayleigh scattering light backward.These carry the signal light of extraneous vibration information, through photoelectric conversion module (APD) 4
Photoelectric conversion and analog-to-digital conversion module (ADC) 5 analog-to-digital conversion, entering signal screens processing module (DSP) 6 and carries out data point
Analysis.Signal screening processing module (DSP) 6 is according to collected data, according to the time difference of detection light and Rayleigh scattering light echo, essence
Really judge fiber-optic vibration scene position, and carries out audio reduction technique and handle to obtain audio file.
Wherein, Fig. 3 is audio reduction technique process flow diagram.It is to vibration signal first such as above-mentioned audio reduction technique
Interpolation is carried out, is inserted between each point of vibration signal, each point of vibration signal is inserted into 63 0 value signal points, will
Initial value carries out the signal that interpolation obtains, then carries out convolution algorithm with filter, then extracts again and meets adopting for audio playing standard
The signal of sample rate has obtained 64 times of amplified signal of original signal by low-pass filter.It is fiber-optic vibration by airspace
The intensity of signal is matched with corresponding fiber lengths, and is corresponded to length with setting optical fiber according to airspace and combined, and optical fiber is obtained
Point is detected, it is main to Time Domain Processing and spatial processing are as follows: to use M dimensional vectorIndicate that n-th collects
Clutter echo, M indicate that neighbouring resolution cell format, M indicate the clutter unit that resolution cell is formed.It is rightIn element
It is ranked up to obtain vector。
Audio sample reduction treatment is carried out to the sampled point of some single-point.The fiber-optic vibration strength signal of detecting point is deposited
It is placed onIn.
Signal stabilization background is carried out to the fiber-optic vibration signal, signal is filtered, filters window function, filtering be to inverted sequence andIt adds up.FourValue is not
It is 0, to its four multiplication and three sub-additions.According to scaling pairIt zooms in and out to obtain final signal y.
It is rightEvery 32 points extract a point, form final signal, optical fiber voice signal is determined by resampling
Two sampled points distance, program can according to audio restore require directly calculating sampling filter step-length.
As described above, fiber-optic vibration signal caused by sound to amplification carries out low-pass filtering, filter is to multiphase filtering
Output and sinusoidal windows function product afterwards are using sinusoidal window function, noise signal is handled,
Obtained audio signal is restored.
It is restored from the foregoing, it will be observed that can finally the vibration information monitored be accurately positioned with audio, for rescue, team is provided
Simply, understandable, efficient information.The plenty of time is saved for effective rescue work.
Although the present invention is not to limit the scope of the invention as above with embodiment explanation, all using present specification and attached
Equivalent structure or the process transformation that figure content is done, direct or indirect is used in other related technical areas, in this hair
In bright scope of patent protection.
Claims (8)
1. a kind of audio reduction auxiliary rescue system based on fiber-optic vibration characterized by comprising optical fiber (1), beam splitter
(2), light-pulse generator module (3), photoelectric conversion module (4), analog-to-digital conversion module (5), signal screening processing module (6), upper
Machine data analysis system (7), client display system (8)；The optical fiber (1) is connected with beam splitter (2)；The beam splitter (2)
It is connected respectively with light-pulse generator module (3) and photoelectric conversion module (4)；The photoelectric conversion module (4) and analog-to-digital conversion module
(5) it is connected；The analog-to-digital conversion module (5) is connected with signal screening processing module (6)；The signal screening processing module (6)
It is connected with host computer data analysis system (7)；The host computer data analysis system (7) is connected with client display system (8).
2. the audio reduction auxiliary rescue system of the vibration of optical fiber according to claim 1, which is characterized in that optical fiber only needs general
An optical fiber in logical communications optical cable makees sensing unit, carries out Distributed Multi vibration detecting.
3. the audio reduction auxiliary rescue system of fiber-optic vibration according to claim 1, which is characterized in that light-pulse generator module
Issue satisfactory pulsed light.
4. the audio reduction auxiliary rescue system of vibration according to claim 3, which is characterized in that light-pulse generator module hair
Pulsed light is thrown into specified optical fiber out.
5. the audio reduction auxiliary rescue system of fiber-optic vibration according to claim 4, which is characterized in that light wave is in optical fiber
A variety of scatterings can be generated, and wherein back rayleigh scattering is the most obvious, regular and stable；Back rayleigh scattering returns to light wave
Pass through beam splitter after entrance port and the light wave of return is divided into orthogonal two-beam wave.
6. the audio reduction auxiliary rescue system of fiber-optic vibration according to claim 5, which is characterized in that back rayleigh scattering
Light converts optical signals to be converted electric signal by mould electricity conversion module after electric signal after beam splitter, by photoelectric conversion module
For digital signal.
7. the audio reduction auxiliary rescue system of fiber-optic vibration according to claim 6, which is characterized in that digital signal enters
Signal screening module carries out data quick-processing.
8. the audio reduction auxiliary rescue system of fiber-optic vibration according to claim 7, which is characterized in that signal screening module
Processed data are reduced into audio file by host computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810424807.6A CN110454227A (en) | 2018-05-07 | 2018-05-07 | Auxiliary rescue system is listened in a kind of vibration based on optical fiber |
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| CN201810424807.6A CN110454227A (en) | 2018-05-07 | 2018-05-07 | Auxiliary rescue system is listened in a kind of vibration based on optical fiber |
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| CN110454227A true CN110454227A (en) | 2019-11-15 |
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| CN201810424807.6A Pending CN110454227A (en) | 2018-05-07 | 2018-05-07 | Auxiliary rescue system is listened in a kind of vibration based on optical fiber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414030A (en) * | 2021-12-10 | 2022-04-29 | 中南安全环境技术研究院股份有限公司 | Positioning boundary pile for field search and rescue and positioning method |
-
2018
- 2018-05-07 CN CN201810424807.6A patent/CN110454227A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414030A (en) * | 2021-12-10 | 2022-04-29 | 中南安全环境技术研究院股份有限公司 | Positioning boundary pile for field search and rescue and positioning method |
| CN114414030B (en) * | 2021-12-10 | 2024-01-26 | 中南安全环境技术研究院股份有限公司 | Positioning boundary pile for field search and rescue and positioning method |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20191115 |
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| WD01 | Invention patent application deemed withdrawn after publication |