Mining distributed optical fiber sound wave sensing monitoring system

Abstract

The utility model discloses a mining distributed optical fiber sound wave sensing and monitoring system, which comprises an over-mine part and an under-mine part which are connected through an optical fiber, and the over-mine part is provided with a first power supply module, an industrial control module, a data acquisition module, a digital light emitting module, a first wavelength division multiplexer and an analog light receiving module which are connected in sequence. The digital light emitting module is also connected with the first power supply module, and the analog light receiving module is also connected with the data acquisition module; the under-mine part is provided with a second wavelength division multiplexer, a digital optical receiving module, a second power supply module, a distributed optical fiber sound wave sensing module and an analog optical transmitting module which are connected in sequence, the analog optical transmitting module is further connected with the second wavelength division multiplexer, and the second power supply module is connected with the digital optical receiving module, the analog optical transmitting module and the distributed optical fiber sound wave sensing module. The distributed optical fiber sound wave sensing module is connected with a monitoring optical fiber through an optical fiber. The system is high in practicability, convenient to implement, reliable in performance and long in service life.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical fiber sensing technology, specifically a mine distributed optical fiber acoustic wave sensing monitoring system. BACKGROUND

[0002] The traditional mine distributed optical fiber acoustic wave sensing monitoring system is composed of a distributed optical fiber acoustic wave sensing module, a data acquisition module, an industrial control module, a power supply module and a monitoring optical fiber laid under the mine, wherein each module unit is usually compactly integrated in one device and placed under the mine, and communication is realized in the form of electrical signals between the modules. However, due to the harsh environment under the mine, the electrical equipment needs to have high reliability performance such as explosion-proof, moisture-proof, corrosion-proof, dust-proof and leakage-proof, which makes the data acquisition module and the industrial control module in the traditional distributed optical fiber acoustic wave sensing monitoring system unsuitable to be placed under the mine, because this will cause the service life of the system to be not long and the system performance will also decrease with the extension of the use time. SUMMARY

[0003] The utility model aims at the deficiency of prior art, and provides a mine distributed optical fiber acoustic wave sensing monitoring system. This system uses analog radio frequency optical fiber transmission technology, wavelength division multiplexing technology and photoelectric signal conversion technology to realize remote optical communication interconnection between the above-ground mechanism and the underground mechanism, and finally completes the monitoring of the underground acoustic wave information. This system has strong practicability, is convenient to implement, reliable in performance and long in service life.

[0004] The technical scheme for realizing the utility model is as follows:

[0005] A mine distributed optical fiber acoustic wave sensing monitoring system comprises an above-ground part and an underground part connected by optical fibers, the above-ground part and the underground part simultaneously transmit optical pulse signals and analog optical signals, and the wavelength division multiplexing technology is used to realize independent transmission of the two optical signals in the same optical fiber without interference, wherein:

[0006] The upper mine part is provided with sequentially connected first power supply module, industrial control module, data acquisition module, digital light emitting module, first wavelength division multiplexer and analog light receiving module, the digital light emitting module is further connected with the first power supply module, the analog light receiving module is further connected with the data acquisition module, the first power supply module supplies power for the industrial control module, the digital light emitting module and the analog light receiving module, the industrial control module is connected with the data acquisition module through the PCIE connector to supply power for the data acquisition module, simultaneously analyze and process data, and restore the sound wave information of the monitoring optical fiber, the data acquisition module is connected with the digital light emitting module and the analog light receiving module through the coaxial cable to output electric pulse and receive analog electric signal, and the received analog electric signal is processed into phase and amplitude data, the digital light emitting module is connected with the first wavelength division multiplexer through the optical fiber to convert the electric pulse input into optical pulse output, and the analog light receiving module is connected with the first wavelength division multiplexer through the optical fiber to convert the analog optical signal input into analog electric signal output;

[0007] The lower mine part is provided with sequentially connected second wavelength division multiplexer, digital light receiving module, second power supply module, distributed optical fiber sound wave sensing module and analog light emitting module, the analog light emitting module is further connected with the second wavelength division multiplexer, the second power supply module is connected with the digital light receiving module, the analog light emitting module and the distributed optical fiber sound wave sensing module, and is used for power supply, the distributed optical fiber sound wave sensing module is connected with the monitoring optical fiber through the optical fiber to output optical pulse, and converts the backscattering Rayleigh light returned by the monitoring optical fiber into analog electric signal, the monitoring optical fiber monitors the sound wave signal under the mine, transmits the optical pulse and the backscattering Rayleigh light, the second wavelength division multiplexer is connected with the digital light receiving module and the analog light emitting module through the optical fiber to simultaneously transmit the optical pulse signal and the analog optical signal, and through the wavelength division multiplexing technology, the two light signals are independently transmitted in the same optical fiber and do not interfere with each other, the digital light receiving module is connected with the distributed optical fiber sound wave sensing module through the coaxial cable to convert the optical pulse input into electric pulse output, the analog light emitting module is connected with the distributed optical fiber sound wave sensing module through the coaxial cable to convert the analog electric signal input into analog optical signal output, and the first wavelength division multiplexer in the upper mine part is connected with the second wavelength division multiplexer in the lower mine part through the optical fiber.

[0008] The working process of the technical scheme is as follows:

[0009] The first power supply module and the second power supply module provide electric energy for each module of the system, including 220V alternating current, 12V direct current, +5V direct current and -5V direct current;

[0010] The electric pulse is transmitted from the mine to the underground mine: first, the data acquisition module on the mine triggers the port to generate an electric pulse 1 with a frequency of 2 kHz and a pulse width of 100 ns, and then is transmitted to the digital light emitting module through the coaxial cable; after receiving the electric pulse 1, the digital light emitting module converts it into an optical pulse 1 with a wavelength of 1310 nm, a frequency of 2 kHz and a pulse width of 100 ns; then, the optical pulse 1 with a wavelength of 1310 nm, a frequency of 2 kHz and a pulse width of 100 ns is transmitted to the 1310 nm port of the first wavelength division multiplexer through the optical fiber; after wavelength division, it is output from the common port of the first wavelength division multiplexer, and then transmitted to the common port of the second wavelength division multiplexer underground through the optical fiber; then, the second wavelength division multiplexer demultiplexes the optical pulse 1 with a wavelength of 1310 nm, a frequency of 2 kHz and a pulse width of 100 ns, and transmits it to the digital light receiving module through the optical fiber; finally, the digital light receiving module restores the optical pulse 1 with a wavelength of 1310 nm, a frequency of 2 kHz and a pulse width of 100 ns to an electric pulse 2 with a frequency of 2 kHz and a pulse width of 100 ns, which is transmitted to the distributed optical fiber acoustic wave sensing module through the coaxial cable, and the transmission of the electric pulse from the mine to the underground mine is completed.

[0011] Then, the distributed optical fiber acoustic wave sensing module modulates the output light with the electric pulse 2 to generate an optical pulse 2 with a wavelength of 1550 nm, a frequency of 2 kHz and a pulse width of 100 ns, which propagates along the monitoring optical fiber; when the optical pulse 2 propagates in the monitoring optical fiber, it will produce backscattering Rayleigh scattering light and return to the distributed optical fiber acoustic wave sensing module; after receiving the backscattering Rayleigh scattering light, the distributed optical fiber acoustic wave sensing module converts it into an analog electric signal 2.

[0012] Then, the analog electric signal is transmitted from the underground mine to the mine as follows: first, the analog light emitting module underground receives the analog electric signal 2 of the distributed optical fiber acoustic wave sensing module and converts it into an analog optical signal with a wavelength of 1550 nm; the 1550 nm analog optical signal is transmitted to the 1550 nm port of the second wavelength division multiplexer through the optical fiber; after wavelength division, it is output from the common port of the second wavelength division multiplexer, and then transmitted to the common port of the first wavelength division multiplexer on the mine through the optical fiber; then, the first wavelength division multiplexer demultiplexes the analog optical signal with a wavelength of 1550 nm and transmits it to the analog light receiving module through the optical fiber; finally, the analog light receiving module restores the analog optical signal with a wavelength of 1550 nm to an analog electric signal 1, and the analog electric signal 1 is transmitted to the data acquisition port of the data acquisition module through the coaxial cable; thus, the transmission of the analog electric signal from the underground mine to the mine is completed; finally, the data acquisition module processes the collected analog electric signal 1, generates phase and amplitude data and outputs them to the industrial control module 1; the industrial control module 1 analyzes the phase and amplitude data by algorithm, and finally restores the acoustic wave information at the monitoring optical fiber.

[0013] The distributed optical fiber acoustic wave sensing module, the power supply module and the monitoring optical cable in the traditional system are placed under the mine, the industrial control module, the data acquisition module and the power supply module are placed on the mine, and through the analog radio frequency optical fiber transmission technology, the wavelength division multiplexing technology and the photoelectric signal conversion technology, remote optical communication interconnection between the on-mine mechanism and the under-mine mechanism is realized, and finally the monitoring of the under-mine acoustic wave information is completed.

[0014] The industrial control module and the data acquisition module which are not suitable for the harsh environment under the mine are placed on the mine, so that the service life of the system is significantly prolonged and the overall reliability is improved, meanwhile, the under-mine module can normally operate only by low-voltage power supply, and the safety of the power supply under the mine is further ensured.

[0015] The system has the advantages of strong practicability, convenient implementation, reliable performance and long service life. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of the embodiment.

[0017] In the figure, 1. first power supply module 2. industrial control module 3. data acquisition module 4. digital light emitting module 5. analog light receiving module 6. first wavelength division multiplexer 7. second wavelength division multiplexer 8. digital light receiving module 9. analog light emitting module 10. second power supply module 11. distributed optical fiber acoustic wave sensing module 12. monitoring optical fiber. DETAILED DESCRIPTION

[0018] The content of the utility model will be further described below in combination with the drawings and embodiments, but is not limited to the utility model.

[0019] Embodiment:

[0020] Reference Figure 1 A mine distributed optical fiber acoustic wave sensing monitoring system, comprising an on-mine part and an under-mine part connected by optical fibers, the on-mine part and the under-mine part simultaneously transmit optical pulse signals and analog optical signals, and through wavelength division multiplexing technology, two optical signals are independently transmitted in the same optical fiber without interference, wherein:

[0021] The upper mine part is provided with sequentially connected first power supply module 1, industrial control module 2, data acquisition module 3, digital light emitting module 4, first wavelength division multiplexer 6 and analog light receiving module 5, the digital light emitting module 4 is further connected with the first power supply module 1, the analog light receiving module 5 is further connected with the data acquisition module 3, the first power supply module 1 supplies power for the industrial control module 2, the digital light emitting module 4 and the analog light receiving module 5, the industrial control module 2 is connected with the data acquisition module 3 through a PCIE connector to supply power for the data acquisition module 3, analyze and process data and restore the sound wave information of the monitoring optical fiber, the data acquisition module 3 is connected with the digital light emitting module 4 and the analog light receiving module 5 through a coaxial cable to output an electric pulse and receive an analog electric signal, and process the received analog electric signal into phase and amplitude data, the digital light emitting module 4 is connected with the first wavelength division multiplexer 6 through an optical fiber to convert the electric pulse input into optical pulse output, and the analog light receiving module 5 is connected with the first wavelength division multiplexer 6 through an optical fiber to convert the analog optical signal input into analog electric signal output.

[0022] The lower mine part is provided with sequentially connected second wavelength division multiplexer 7, digital light receiving module 8, second power supply module 10, distributed optical fiber sound wave sensing module 11 and analog light emitting module 9, the analog light emitting module 9 is further connected with the second wavelength division multiplexer 7, the second power supply module 10 is connected with the digital light receiving module 8, the analog light emitting module 9 and the distributed optical fiber sound wave sensing module 11 to supply power, the distributed optical fiber sound wave sensing module 11 is connected with the monitoring optical fiber 12 through an optical fiber to output an optical pulse, and converts the backscattering Rayleigh light returned by the monitoring optical fiber 12 into an analog electric signal, the monitoring optical fiber 12 monitors the sound wave signal, transmits the optical pulse and the backscattering Rayleigh light, the second wavelength division multiplexer 7 is connected with the digital light receiving module 8 and the analog light emitting module 9 through an optical fiber to simultaneously transmit the optical pulse signal and the analog optical signal, and realizes independent transmission of the two light signals in the same optical fiber without interference through wavelength division multiplexing technology, the digital light receiving module 8 is connected with the distributed optical fiber sound wave sensing module 11 through a coaxial cable to convert the optical pulse input into an electric pulse output, the analog light emitting module 9 is connected with the distributed optical fiber sound wave sensing module 11 through a coaxial cable to convert the analog electric signal input into an analog optical signal output, and the first wavelength division multiplexer 6 in the upper mine part is connected with the second wavelength division multiplexer 7 in the lower mine part through an optical fiber.

[0023] In this example, the first power supply module 1 is RD-125, and the industrial control module 2, the digital light emitting module 4 and the analog light receiving module 5 are sequentially supplied with 220V alternating current, 5V direct current and 5V direct current respectively;

[0024] The industrial control module 2 is ARK-3534B, which is connected with the data acquisition module 3 through a PCIEx8 connector to supply 12V direct current for the data acquisition module 3, analyze and process the phase and amplitude data returned by the data acquisition module 3, and restore the sound wave information at the monitoring optical fiber 12.

[0025] The data acquisition module 3 is GY-DAS-250M-DAQ, which is connected with the digital light emitting module 4 and the analog light receiving module 5 by coaxial cable to output the electric pulse 1 with a frequency of 2 kHz and a pulse width of 100 ns and receive analog electric signal 1, and process the received analog electric signal 1 into phase and amplitude data;

[0026] The digital light emitting module 4 is GT-SY132-F3-1 / L, which is connected with the first wavelength division multiplexer 6 by optical fiber to convert the electric pulse 1 with a frequency of 2 kHz and a pulse width of 100 ns into the optical pulse 1 with a wavelength of 1310 nm, a frequency of 2 kHz and a pulse width of 100 ns;

[0027] The analog light receiving module 5 is OM-RXC000NF-OW00, which is connected with the first wavelength division multiplexer 6 by optical fiber to convert the 1550 nm analog optical signal input into the analog electric signal 1 output;

[0028] The first wavelength division multiplexer 6 is FBT-W-0102-1315-W-1-B1-L-01-FA, which is connected with the second wavelength division multiplexer 7 by optical fiber to simultaneously transmit the optical pulse 1 with a wavelength of 1310 nm and the 1550 nm analog optical signal, and realize independent transmission of the two optical signals in the same optical fiber without interference by wavelength division multiplexing technology;

[0029] The second wavelength division multiplexer 7 is FBT-W-0102-1315-W-1-B1-L-01-FA, which is connected with the digital light receiving module 8 and the analog light emitting module 9 by optical fiber to simultaneously transmit the optical pulse 1 with a wavelength of 1310 nm and the 1550 nm analog optical signal, and realize independent transmission of the two optical signals in the same optical fiber without interference by wavelength division multiplexing technology;

[0030] The digital light receiving module 8 is PD12C-200M, which is connected with the distributed optical fiber acoustic wave sensing module 11 by coaxial cable to restore the optical pulse 1 with a wavelength of 1310 nm, a frequency of 2 kHz and a pulse width of 100 ns into the electric pulse 2 with a frequency of 2 kHz and a pulse width of 100 ns;

[0031] The analog light emitting module 9 is OM-TXC155NF-OW00, which is connected with the distributed optical fiber acoustic wave sensing module 11 by coaxial cable to convert the analog electric signal 2 input into the 1550 nm analog optical signal output;

[0032] The second power supply module 10 is RT-125, which is connected with the digital light receiving module 8, the analog light emitting module 9 and the distributed optical fiber acoustic wave sensing module 11 by electric wire to sequentially supply 12V direct current, ±5V direct current and 5V direct current;

[0033] The distributed optical fiber acoustic sensing module 11 is GY-DAS-40-1 and is connected with the monitoring optical fiber 12 through an optical fiber, and is used for outputting the optical pulse 2 with a wavelength of 1550 nm, a frequency of 2 kHz and a pulse width of 100 ns, and converting the back Rayleigh scattering light into an analog electric signal 2;

[0034] The monitoring optical fiber 12 is GYXTW-4B1.3 and is used for monitoring the underground acoustic wave signal, transmitting the optical pulse 2 and returning the back Rayleigh scattering light.

[0035] The working process of the example is as follows:

[0036] The first power supply module 1 and the second power supply module 10 provide electric energy for each module of the system, including 220V alternating current, 12V direct current, +5V direct current and -5V direct current;

[0037] The electric pulse is transmitted from the mine to the underground mine: first, the data acquisition module 3 on the mine triggers the port to generate the electric pulse 1 with a frequency of 2 kHz and a pulse width of 100 ns, and then the electric pulse 1 is transmitted to the digital optical emitting module 4 through a coaxial cable; after receiving the electric pulse 1, the digital optical emitting module 4 converts the electric pulse 1 into the optical pulse 1 with a wavelength of 1310 nm, a frequency of 2 kHz and a pulse width of 100 ns; then, the optical pulse 1 with a wavelength of 1310 nm, a frequency of 2 kHz and a pulse width of 100 ns is transmitted to the 1310 nm port of the first wavelength division multiplexer 6 through an optical fiber, and is output from the common port of the first wavelength division multiplexer 6 after wavelength division multiplexing; then, the optical pulse 1 with a wavelength of 1310 nm, a frequency of 2 kHz and a pulse width of 100 ns is transmitted to the common port of the second wavelength division multiplexer 7 through an optical fiber; then, the second wavelength division multiplexer 7 demultiplexes the optical pulse 1 with a wavelength of 1310 nm, a frequency of 2 kHz and a pulse width of 100 ns, and transmits the optical pulse 1 to the digital optical receiving module 8 through an optical fiber; finally, the digital optical receiving module 8 restores the optical pulse 1 with a wavelength of 1310 nm, a frequency of 2 kHz and a pulse width of 100 ns to the electric pulse 2 with a frequency of 2 kHz and a pulse width of 100 ns, and the electric pulse 2 is transmitted to the distributed optical fiber acoustic sensing module 11 through a coaxial cable, and the transmission of the electric pulse from the mine to the underground mine is completed;

[0038] Then, the distributed optical fiber acoustic sensing module 11 modulates the output light using the electric pulse 2 to generate the optical pulse 2 with a wavelength of 1550 nm, a frequency of 2 kHz and a pulse width of 100 ns, and the optical pulse 2 propagates along the monitoring optical fiber 12; when the optical pulse 2 propagates in the monitoring optical fiber 12, the back Rayleigh scattering light is generated and returned to the distributed optical fiber acoustic sensing module 11; after receiving the back Rayleigh scattering light, the distributed optical fiber acoustic sensing module 11 converts the back Rayleigh scattering light into the analog electric signal 2;

[0039] Then, the analog electrical signal is transmitted from the underground to the surface as follows: first, the underground analog optical transmitting module 9 receives the analog electrical signal 2 of the distributed optical fiber acoustic wave sensing module 11 and converts it into an analog optical signal with a wavelength of 1550 nm, which is transmitted to the 1550 nm port of the second wavelength division multiplexer 7 through an optical fiber, output from the common port of the second wavelength division multiplexer 7 after wavelength division multiplexing, and then transmitted to the common port of the first wavelength division multiplexer 6 on the surface through an optical fiber. Subsequently, the first wavelength division multiplexer 6 demultiplexes the analog optical signal with a wavelength of 1550 nm and transmits it to the analog optical receiving module 5 through an optical fiber. Finally, the analog optical receiving module 5 restores the analog optical signal with a wavelength of 1550 nm to an analog electrical signal 1, which is transmitted to the data acquisition port of the data acquisition module through a coaxial cable. Thus, the transmission of the analog electrical signal from the underground to the surface is completed. Finally, the data acquisition module 3 processes the collected analog electrical signal 1, generates phase and amplitude data, and outputs them to the industrial control module 1. The industrial control module 1 analyzes the phase and amplitude data through an algorithm and finally restores the acoustic wave information at the monitoring optical fiber 12.

Claims

1. A distributed optical fiber acoustic wave sensing monitoring system for mining, characterized in that, The mine upper part and the mine lower part are connected by optical fiber, wherein: The mine upper part is provided with a first power supply module, an industrial control module, a data acquisition module, a digital light emitting module, a first wavelength division multiplexer and an analog light receiving module connected in sequence, the digital light emitting module is further connected with the first power supply module, the analog light receiving module is further connected with the data acquisition module, the industrial control module is connected with the data acquisition module by a PCIE connector to supply power to the data acquisition module, the data acquisition module is connected with the digital light emitting module and the analog light receiving module by coaxial cables, the digital light emitting module is connected with the first wavelength division multiplexer by optical fiber to convert electrical pulse input into optical pulse output, and the analog light receiving module is connected with the first wavelength division multiplexer by optical fiber to convert analog light signal input into analog electrical signal output; The mine lower part is provided with a second wavelength division multiplexer, a digital light receiving module, a second power supply module, a distributed optical fiber acoustic sensing module and an analog light emitting module connected in sequence, the analog light emitting module is further connected with the second wavelength division multiplexer, the second power supply module is connected with the digital light receiving module, the analog light emitting module and the distributed optical fiber acoustic sensing module, the distributed optical fiber acoustic sensing module monitors the optical fiber by optical fiber connection, the second wavelength division multiplexer is connected with the digital light receiving module and the analog light emitting module by optical fiber, the digital light receiving module is connected with the distributed optical fiber acoustic sensing module by coaxial cables to convert optical pulse input into electrical pulse output, the analog light emitting module is connected with the distributed optical fiber acoustic sensing module by coaxial cables to convert analog electrical signal input into analog light signal output, and the first wavelength division multiplexer in the mine upper part is connected with the second wavelength division multiplexer in the mine lower part by optical fiber.

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