CN104729547A - Wireless optical fiber sensing device, information monitoring device and wireless optical fiber sensing system - Google Patents
Wireless optical fiber sensing device, information monitoring device and wireless optical fiber sensing system Download PDFInfo
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Abstract
The invention discloses a wireless optical fiber sensing device which comprises an annular cavity multi-longitudinal-mode optical fiber laser sensor array, a conversion module and a wireless transmitter. The annular cavity multi-longitudinal-mode optical fiber laser sensor array comprises N optical fiber sensing probes and is used for obtaining N pieces of physical information to be monitored and generating corresponding N paths of light signals; the conversion module is connected with the annular cavity multi-longitudinal-mode optical fiber laser sensor array and used for generating N electronic radio frequency beat frequency signals corresponding to the N pieces of physical information according to the N paths of light signals; the wireless transmitter is connected with the conversion module and used for sending the N electronic radio frequency beat frequency signals to an information monitoring device so that the information monitoring device can monitor the N pieces of physical information based on the N electronic radio frequency beat frequency signals. The invention further discloses an information monitoring device and a wireless optical fiber sensing system.
Description
Technical field
The present invention relates to electronic technology field, particularly relate to a kind of radio optic fiber sensing device, information monitoring device and radio optic fiber sensing system.
Background technology
Wireless sensor technology be calculate, communication and the product that combines of sensor three technology, by all kinds of microsensor, Real-Time Monitoring is carried out to target information, by Embedded Computer Resources, information is processed, and by cordless communication network, information is sent to long-distance user and realizes long-range, Real-Time Monitoring.Wireless sensor technology can be widely used in the fields such as national defense and military, national security, hazard prediction, safety monitoring, traffic administration, the development of urban informationization.
Fibre Optical Sensor has electromagnetism interference, corrosion-resistant, essential safety, volume are little, lightweight, antijamming capability is strong, Wavelength-encoding, be easy to the advantages such as multiplexing networking, and it can be used for the physical messages such as monitor strain, temperature, vibration.Fibre Optical Sensor obtains in recent years and develops rapidly, and it is widely used in the fields such as building, industry monitoring, seismic monitoring, particularly in the strong electromagnetic such as various large-scale electromechanics, petrochemical complex, mine and the rugged surroundings such as inflammable and explosive.
Conventional wireless sensor-based system utilizes electric transducer to realize a large amount of physical quantity sensing.But electric transducer cannot use in strong electromagnetic, deep-etching, the particular surroundings such as, and in the occasion of explosion-proof, the anti-electromagnetic interference (EMI) of some needs, the wireless senser of electrical characteristics is used to be restricted under water.
If Fibre Optical Sensor can be dissolved into wireless sense network, so just can play optical fiber and both advantage wireless simultaneously.Such sensor-based system can have the great flexibility of wireless network, there is again the advantage of the Fibre Optical Sensors such as the anti-electromagnetism of Fibre Optical Sensor, explosion-proof, secret communication, expand monitoring distance and the application of Fibre Optical Sensor, this is that a kind of novel, coming polymorphic type merges sensing technology.
But radio optic fiber sensing system of the prior art, owing to being that fiber-optic grating sensor and wireless receiving emitter simply combine.Transducing signal based on fiber grating is the wavelength information of light or the phase information of light, transducing signal must carry out demodulation by spectrometer optical interference demodulated equipments such as (or) phase-interferometers to light signal, because these optical interference demodulated equipments have the drawbacks such as volume is large, power consumption is high, therefore, there is the technical matters that volume is large, power attenuation is large in radio optic fiber sensing system of the prior art.
Summary of the invention
The embodiment of the present application is by providing a kind of radio optic fiber sensing device, information monitoring device and radio optic fiber sensing system, solve radio optic fiber sensing system of the prior art, owing to using optical interference demodulation mode to carry out demodulation to light signal, there is the technical matters that volume is large, power attenuation is large.
On the one hand, the application provides following technical scheme by an embodiment of the application:
A kind of radio optic fiber sensing device, comprising:
Ring cavity many longitudinal modes fiber laser sensor array, comprises N number of Fibre Optical Sensor detecting head, for obtaining N number of physical message to be monitored, and generates corresponding N road light signal, N be more than or equal to 1 integer;
Modular converter, is connected with described ring cavity many longitudinal modes fiber laser sensor array, for according to described N road light signal, generates the N number of electronic radio-frequency beat signal corresponding with described N number of physical message;
Radio transmitters, is connected with described modular converter, for described N number of electronic radio-frequency beat signal is sent to information monitoring device, monitors based on described N number of electronic radio-frequency beat signal to enable described information monitoring device to described N number of physical message.
As shown from the above technical solution, in the demodulating process (that is: light signal being converted into the process of the electric signal corresponding with physical message to be monitored) to light signal, optical interference demodulated equipment is not had to participate in, thus solve radio optic fiber sensing system of the prior art, owing to using optical interference demodulated equipment, there is the technical matters that volume is large, power attenuation is large, achieve the volume reducing radio optic fiber sensing system, and reduce the technique effect of power consumption.
Preferably, described modular converter, comprising:
Coupling mechanism, for being coupled to described N road light signal, obtains a road light signal;
Photodetector, is connected with described coupling mechanism, for a described road light signal is converted to electric signal, and generates the first electronic radio-frequency beat signal;
Frequency detector, is connected with described photodetector, for measuring described first electronic radio-frequency beat signal, obtains described N number of electronic radio-frequency beat signal;
Signal modulator, for modulating described N number of electronic radio-frequency beat signal frequency information, obtains modulation signal.
Preferably, the length of the resonator cavity of each described N number of Fibre Optical Sensor detecting head is all within the scope of preset length, makes the frequency of described electronic radio-frequency beat signal be the signal frequency of prior wireless network.
Preferably, described radio transmitters, also for:
By described prior wireless network, described modulation signal is sent to described information monitoring device.
As shown from the above technical solution, optical fiber sensing technology and wireless technology are effectively combined, the frequency range of the electronic radio-frequency beat signal generated can be controlled in the signal frequency range of prior wireless network, thus electronic radio-frequency beat signal is directly incorporated existing wireless network by wireless launcher, realize effective integration, resource multiplex.
Preferably, described ring cavity many longitudinal modes fiber laser sensor array, described modular converter and described radio transmitters are integrated on the first veneer circuit.
As shown from the above technical solution, described ring cavity multilongitudianl-mode laser sensor array, described modular converter and described transmitter are integrated on one piece of veneer circuit, by some series of tasks such as monitoring survey, opto-electronic conversion, signal madulation, signal transmitting of a veneer circuit realiration physical message, substantially increase the integrated level of system, reduce the volume of system, reduce the cost of system, obtain higher stability.
On the other hand, based on same inventive concept, the application, by an embodiment of the application, provides following technical scheme:
A kind of information monitoring device, comprising:
Wireless receiver, for receiving N number of electronic radio-frequency beat signal that radio optic fiber sensing device sends, described N number of electronic radio-frequency beat signal is corresponding respectively with N number of physical message to be monitored;
Monitor, is connected with described demodulator of PM signal PM, for based on described N electronic radio-frequency beat signal, monitors described N number of physical message.
Preferably, described wireless receiver, specifically for:
For receiving the modulation signal corresponding with described N number of electronic radio-frequency beat signal.
Preferably, described device also comprises:
Demodulator of PM signal PM, is connected with described wireless receiver, for carrying out demodulation to described modulation signal, obtains described N number of electronic radio-frequency beat signal.
Preferably, described wireless receiver, described monitor and described demodulator of PM signal PM are integrated on the second veneer circuit.
As shown from the above technical solution, described wireless receiver, demodulator of PM signal PM, monitor can be integrated on one piece of veneer circuit, by a veneer circuit realiration to the reception of signal, some series of tasks such as the demodulation of signal, the monitoring survey of physical message, substantially increase the integrated level of system, reduce the volume of system, reduce the cost of system, obtain higher stability.
On the other hand, based on same inventive concept, the application, by an embodiment of the application, provides following technical scheme:
A kind of radio optic fiber sensing system, comprising:
Radio optic fiber sensing device;
Information monitoring device;
Wherein, described radio optic fiber sensing device can obtain N number of physical message to be monitored, generate corresponding N road light signal, and according to described N road light signal, generate the N number of electronic radio-frequency beat signal corresponding with described N number of physical message, wirelessly described N number of electronic radio-frequency beat signal is sent to described information monitoring device, based on described N number of electronic radio-frequency beat signal, described N number of physical message is monitored to enable described monitor.
As shown from the above technical solution, in the demodulating process (that is: light signal being converted into the process of the electric signal corresponding with physical message to be monitored) to light signal, optical interference demodulated equipment is not had to participate in, thus solve radio optic fiber sensing system of the prior art, owing to using optical interference demodulated equipment, there is the technical matters that volume is large, power attenuation is large, achieve the volume reducing radio optic fiber sensing system, and reduce the technique effect of power consumption.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The schematic diagram of the radio optic fiber sensing device in Fig. 1 the embodiment of the present application one;
The schematic diagram of the information monitoring device in Fig. 2 the embodiment of the present application two;
The schematic diagram of the radio optic fiber sensing system in Fig. 3 the embodiment of the present application three.
Embodiment
The embodiment of the present application is by providing a kind of radio optic fiber sensing device, information monitoring device and radio optic fiber sensing system, solve radio optic fiber sensing system of the prior art, owing to using optical interference demodulation mode to carry out demodulation to light signal, there is the technical matters that volume is large, power attenuation is large.
The technical scheme of the embodiment of the present application is for solving the problems of the technologies described above, and general thought is as follows:
A kind of radio optic fiber sensing device, comprising:
Ring cavity many longitudinal modes fiber laser sensor array, comprises N number of Fibre Optical Sensor detecting head, for obtaining N number of physical message to be monitored, and generates corresponding N road light signal, N be more than or equal to 1 integer;
Modular converter, is connected with described ring cavity many longitudinal modes fiber laser sensor array, for according to described N road light signal, generates the N number of electronic radio-frequency beat signal corresponding with described N number of physical message;
Radio transmitters, is connected with described modular converter, for described N number of electronic radio-frequency beat signal is sent to information monitoring device, monitors based on described N number of electronic radio-frequency beat signal to enable described information monitoring device to described N number of physical message.
As shown from the above technical solution, in the demodulating process (that is: light signal being converted into the process of the electric signal corresponding with physical message to be monitored) to light signal, optical interference demodulated equipment is not had to participate in, thus solve radio optic fiber sensing system of the prior art, owing to using optical interference demodulated equipment, there is the technical matters that volume is large, power attenuation is large, achieve the volume reducing radio optic fiber sensing system, and reduce the technique effect of power consumption.
For making the object of the application one embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
First illustrate, the term "and/or" occurred herein, being only a kind of incidence relation describing affiliated partner, can there are three kinds of relations in expression, and such as, A and/or B, can represent: individualism A, exists A and B simultaneously, these three kinds of situations of individualism B.In addition, character "/" herein, general expression forward-backward correlation is to the relation liking a kind of "or".
Embodiment one
As shown in Figure 1, the embodiment of the present application provides a kind of radio optic fiber sensing device, comprising:
Ring cavity many longitudinal modes fiber laser sensor array, comprises N number of Fibre Optical Sensor detecting head, for obtaining N number of physical message to be monitored, and generates corresponding N road light signal, N be more than or equal to 1 integer;
Modular converter, is connected with described ring cavity many longitudinal modes fiber laser sensor array, for according to described N road light signal, generates the N number of electronic radio-frequency beat signal corresponding with described N number of physical message;
Radio transmitters, is connected with described modular converter, for described N number of electronic radio-frequency beat signal is sent to information monitoring device, monitors based on described N number of electronic radio-frequency beat signal to enable described information monitoring device to described N number of physical message.
In specific implementation process, described physical message comprises: the physical messages such as stress, temperature, pressure, for described physical message specifically which kind of information, the embodiment of the present application does not do concrete restriction.
In specific implementation process, described ring cavity many longitudinal modes fiber laser sensor array senses physical message to be monitored by Fibre Optical Sensor detecting head, and cause the change of corresponding electronic radio-frequency beat signal, when this physical message changes, the frequency of corresponding electronic radio-frequency beat signal also can change thereupon.
In specific implementation process, the length in the sensor resonant chamber of described N number of Fibre Optical Sensor detecting head is different, without in physics informational influence situation, the corresponding electronic radio-frequency beat signal frequency interval generated is also different separately, by controlling the length in sensor resonant chamber, the electronic radio-frequency beat signal frequency interval of different sensors can be arranged difference.Like this by beat frequency rate interval, just can obtain is the information of which sensor.Under N number of physical message impact, N number of Fibre Optical Sensor detecting head is by the impact of different physical message, can be there is different skews in electronic radio-frequency beat signal, thus make described ring cavity many longitudinal modes fiber laser sensor array can obtain N number of different physical message to be monitored by described N number of Fibre Optical Sensor detecting head.
In specific implementation process, described N number of Fibre Optical Sensor detecting head can be positioned at different positions, thus responds to the physical message of the diverse location in environment to be monitored.
As shown from the above technical solution, in the demodulating process (that is: light signal being converted into the process of the electric signal corresponding with physical message to be monitored) to light signal, optical interference demodulated equipment is not had to participate in, thus solve radio optic fiber sensing system of the prior art, owing to using optical interference demodulated equipment, there is the technical matters that volume is large, power attenuation is large, achieve the volume reducing radio optic fiber sensing system, and reduce the technique effect of power consumption.
And because the price of spectrometer (or phase-interferometer) is very high, the embodiment of the present application can also reduce the cost of radio optic fiber sensing system, thus has the stronger market competitiveness.
In specific implementation process, described ring cavity many longitudinal modes fiber laser sensor array can have various shape, to meet the acquisition of the difference physical message to be measured under varying environment.Such as: integrate described ring cavity many longitudinal modes fiber laser sensor array around on (elongated) cylinder, the heat transfer agent be convenient to as some special occasions in glacier, ocean and so on is measured.
Preferably, in the embodiment of the present application, as shown in Figure 1, described modular converter, comprising:
Coupling mechanism, for being coupled to described N road light signal, obtains a road light signal;
Photodetector, is connected with described coupling mechanism, for a described road light signal is converted to electric signal, and generates the first electronic radio-frequency beat signal;
Frequency detector, is connected with described photodetector, for measuring described first electronic radio-frequency beat signal, obtains described N number of electronic radio-frequency beat signal;
Signal modulator, for modulating described N number of electronic radio-frequency beat signal frequency information, obtains modulation signal.
In specific implementation process, described modular converter, also comprises:
Wavelength division multiplexer, is connected between coupling mechanism and photodetector, for by a described road optical signal in described photodetector.
In specific implementation process, described wavelength division multiplexer is also for obtaining pump light from a pump light source, and described pump light is decomposited N road pump light by described coupling mechanism, and to enable described N number of sensing probe obtain described pump light, thus in running order.Wherein, the wavelength of described pump light can be 1480 nanometers or 980 nanometers.
Preferably, the length of the resonator cavity of each described N number of Fibre Optical Sensor detecting head is all within the scope of preset length, makes the frequency of described electronic radio-frequency beat signal be the signal frequency of prior wireless network.
Preferably, described radio transmitters, also for:
By described prior wireless network, described modulation signal is sent to described information monitoring device.
In specific implementation process, described existing cordless communication network is 2G(G mobile communication) or 3G(G mobile communication) cordless communication network etc., for described cordless communication network specifically which kind of network, the embodiment of the present application does not do concrete restriction.The length in the sensor resonant chamber of described N number of Fibre Optical Sensor detecting head can be in a preset range, the frequency range of the N road beat frequency light signal generated is made to be between 21MHz to 3GHz, this frequency range is in 2G/3G radio communication (900/1800MHz), CDMA (CDMA) communication band 825MHz ~ 835MHz and 870MHz ~ 880MHz and bluetooth 2.4GHz communication band just, can effectively utilize existing network to carry out the transmission of wireless signal like this.
In the embodiment of the present application, control the frequency range of the electronic radio-frequency beat signal generated in the signal frequency range of prior wireless network, thus electronic radio-frequency beat signal is directly incorporated existing wireless network by wireless launcher, realize effective integration, resource multiplex.
Preferably, in the embodiment of the present application, described ring cavity many longitudinal modes fiber laser sensor array, described modular converter and described radio transmitters are integrated on the first veneer circuit.
In specific implementation process, described ring cavity multilongitudianl-mode laser sensor array, described modular converter and described transmitter are integrated on one piece of veneer circuit, by some series of tasks such as monitoring survey, opto-electronic conversion, signal madulation, signal transmitting of a veneer circuit realiration physical message, substantially increase the integrated level of system, reduce the volume of system, reduce the cost of system, obtain higher stability.
Embodiment two
Based on same inventive concept, as shown in Figure 2, the embodiment of the present application provides a kind of information monitoring device, comprising:
A kind of information monitoring device, comprising:
Wireless receiver, for receiving N number of electronic radio-frequency beat signal that radio optic fiber sensing device sends, described N number of electronic radio-frequency beat signal is corresponding respectively with N number of physical message to be monitored;
Monitor, is connected with described demodulator of PM signal PM, for based on described N electronic radio-frequency beat signal, monitors described N number of physical message.
In specific implementation process, described physical message comprises: the physical messages such as stress, temperature, pressure, for described physical message specifically which kind of information, the embodiment of the present application does not do concrete restriction.
Preferably, described wireless receiver, specifically for:
For receiving the modulation signal corresponding with described N number of electronic radio-frequency beat signal.
Preferably, described device, also comprises:
Demodulator of PM signal PM, is connected with described wireless receiver, for carrying out demodulation to described modulation signal, obtains described N number of electronic radio-frequency beat signal.
Preferably, described wireless receiver, described monitor and described demodulator of PM signal PM are integrated on the second veneer circuit.
As shown from the above technical solution, described wireless receiver, demodulator of PM signal PM, monitor can be integrated on one piece of veneer circuit, by a veneer circuit realiration to the reception of signal, some series of tasks such as the demodulation of signal, the monitoring survey of physical message, substantially increase the integrated level of system, reduce the volume of system, reduce the cost of system, obtain higher stability.
Embodiment three
Based on same inventive concept, as shown in Figure 3, the embodiment of the present application provides a kind of radio optic fiber sensing system, comprising:
Radio optic fiber sensing device;
Information monitoring device;
Wherein, described radio optic fiber sensing device can obtain N number of physical message to be monitored, generate corresponding N road light signal, and according to described N road light signal, generate the N number of electronic radio-frequency beat signal corresponding with described N number of physical message, wirelessly described N number of electronic radio-frequency beat signal is sent to described information monitoring device, based on described N number of electronic radio-frequency beat signal, described N number of physical message is monitored to enable described monitor.
As shown from the above technical solution, in the demodulating process (that is: light signal being converted into the process of the electric signal corresponding with physical message to be monitored) to light signal, optical interference demodulated equipment is not had to participate in, thus solve radio optic fiber sensing system of the prior art, owing to using optical interference demodulated equipment, there is the technical matters that volume is large, power attenuation is large, achieve the volume reducing radio optic fiber sensing system, and reduce the technique effect of power consumption.
Wireless optical sensor-based system in the embodiment of the present application is owing to being integrated with the advantage of optical fiber sensing technology, be applicable to anti-electromagnetic interference (EMI), explosion-proof, high temperature, high pressure, have the occasions such as aggressive for the monitoring of the physical messages such as stress, pressure, temperature, be specially adapted to such as under water, the circumstance complication sensing wireless senser such as high temperature oil tank cannot realize detection but have the region needing overlength distance to monitor in real time.Wireless optical sensor-based system in the embodiment of the present application can realize real-time, the unattended extra long distance on-line monitoring of the physical message that counter stress, pressure, temperature etc. cause laser instrument electronic radio-frequency beat signal to change.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a radio optic fiber sensing device, is characterized in that, comprising:
Ring cavity many longitudinal modes fiber laser sensor array, comprises N number of Fibre Optical Sensor detecting head, for obtaining N number of physical message to be monitored, and generates corresponding N road light signal, N be more than or equal to 1 integer;
Modular converter, is connected with described ring cavity many longitudinal modes fiber laser sensor array, for according to described N road light signal, generates the N number of electronic radio-frequency beat signal corresponding with described N number of physical message;
Radio transmitters, is connected with described modular converter, for described N number of electronic radio-frequency beat signal is sent to information monitoring device, monitors based on described N number of electronic radio-frequency beat signal to enable described information monitoring device to described N number of physical message.
2. device as claimed in claim 1, it is characterized in that, described modular converter, comprising:
Coupling mechanism, for being coupled to described N road light signal, obtains a road light signal;
Photodetector, is connected with described coupling mechanism, for a described road light signal is converted to electric signal, and generates the first electronic radio-frequency beat signal;
Frequency detector, is connected with described photodetector, for measuring described first electronic radio-frequency beat signal, obtains described N number of electronic radio-frequency beat signal;
Signal modulator, for modulating described N number of electronic radio-frequency beat signal frequency information, obtains modulation signal.
3. device as claimed in claim 2, it is characterized in that, the length of the resonator cavity of each described N number of Fibre Optical Sensor detecting head is all within the scope of preset length, makes the frequency of described electronic radio-frequency beat signal be the signal frequency of prior wireless network.
4. device as claimed in claim 3, is characterized in that, described radio transmitters, also for:
By described prior wireless network, described modulation signal is sent to described information monitoring device.
5. the device as described in claim as arbitrary in claim 1-4, is characterized in that, described ring cavity many longitudinal modes fiber laser sensor array, described modular converter and described radio transmitters are integrated on the first veneer circuit.
6. an information monitoring device, is characterized in that, comprising:
Wireless receiver, for receiving N number of electronic radio-frequency beat signal that radio optic fiber sensing device sends, described N number of electronic radio-frequency beat signal is corresponding respectively with N number of physical message to be monitored;
Monitor, is connected with described demodulator of PM signal PM, for based on described N electronic radio-frequency beat signal, monitors described N number of physical message.
7. device as claimed in claim 6, is characterized in that, described wireless receiver, specifically for:
For receiving the modulation signal corresponding with described N number of electronic radio-frequency beat signal.
8. device as claimed in claim 7, it is characterized in that, described device, also comprises:
Demodulator of PM signal PM, is connected with described wireless receiver, for carrying out demodulation to described modulation signal, obtains described N number of electronic radio-frequency beat signal.
9. device as claimed in claim 8, it is characterized in that, described wireless receiver, described monitor and described demodulator of PM signal PM are integrated on the second veneer circuit.
10. a radio optic fiber sensing system, is characterized in that, comprising:
Radio optic fiber sensing device as described in claim as arbitrary in claim 1-5;
Information monitoring device as described in claim as arbitrary in claim 6-9;
Wherein, described radio optic fiber sensing device can obtain N number of physical message to be monitored, generate corresponding N road light signal, and according to described N road light signal, generate the N number of electronic radio-frequency beat signal corresponding with described N number of physical message, described N number of electronic radio-frequency beat signal is sent to described information monitoring device, based on described N number of electronic radio-frequency beat signal, described N number of physical message is monitored to enable described information monitoring device.
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Application publication date: 20150624 |