CN109630198B - Distributed sensing optical fiber tandem arrangement protection door monitoring system and method - Google Patents
Distributed sensing optical fiber tandem arrangement protection door monitoring system and method Download PDFInfo
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- CN109630198B CN109630198B CN201910045250.XA CN201910045250A CN109630198B CN 109630198 B CN109630198 B CN 109630198B CN 201910045250 A CN201910045250 A CN 201910045250A CN 109630198 B CN109630198 B CN 109630198B
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 105
- 238000012544 monitoring process Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000003287 optical effect Effects 0.000 claims abstract description 74
- 230000001681 protective effect Effects 0.000 claims abstract description 72
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 239000000835 fiber Substances 0.000 claims description 20
- 238000012545 processing Methods 0.000 claims description 10
- 230000001133 acceleration Effects 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 4
- 230000003993 interaction Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21F17/103—Dams, e.g. for ventilation
- E21F17/12—Dam doors
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
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- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a protection door monitoring system with distributed sensing optical fiber serial arrangement, which comprises a data transmission optical fiber (5) and an optical fiber sensor, and further comprises a light source (101), an optical circulator (102), a photoelectric detector (103) and a data processor (3) connected with the photoelectric detector (103), wherein the light source continuously emits optical signals with different frequencies; the optical fiber sensors are arranged on the protective doors to sense vibration, deformation and switching information of the protective door bodies, the optical fiber sensors on the protective doors at different positions are different in frequency of receiving optical signals, the optical fiber sensors on a plurality of protective doors are connected in series, and the transmission optical fibers (5) are arranged between adjacent optical fiber sensors and between the optical circulator (102) and the optical fiber sensors. The invention also discloses a protection door monitoring method for the distributed sensing optical fiber serial arrangement. The invention realizes the monitoring of vibration and deformation information of the protective door and prevents safety accidents.
Description
Technical Field
The invention belongs to the technical field of protection door monitoring, and particularly relates to a protection door monitoring system and method with distributed sensing optical fibers arranged in series.
Background
The railway tunnel is provided with a grotto, and the grotto is provided with a protective door which is used as a fireproof separation measure to separate a transverse channel, an evacuation channel and a vehicle tunnel. The railway tunnel protection door is arranged beside a track, the whole door face of the protection door receives the effect of repeated and high-strength piston wind for a long time, the risk of damage and even falling off is caused at any time, and the protection door falls off to the side of the track and serious danger thereof can cause operation safety accidents. Therefore, the vibration and deformation conditions of the protective door under the action of the piston wind are monitored, and potential hazards possibly existing in the protective door can be judged in advance through vibration and deformation data so as to overhaul and replace the protective door before the protective door falls off, thereby preventing safety accidents.
The monitoring of the protective door comprises vibration and deformation of the protective door in a door closing state, and impact speed and acceleration generated when the protective door is closed due to the action of piston wind in a door opening state, so that an operator needs to master door opening and closing information of the protective door at any time, and the safety of railway tunnel operation is ensured.
In the prior art, the monitoring of the protective door is usually carried out by an operation unit only by means of manual inspection, and possible risks cannot be judged in advance. In addition, the actual vibration and deformation scheme of the protective door is that a strain gauge is stuck on the door body, but the mode can only measure the surface condition of the door body, has no direct embodiment on the actual vibration and deformation value, and cannot be used as an effective reference for optimizing the design. And no measurement of the instantaneous impact velocity, acceleration of the closing door is involved.
Patent CN108122367A discloses a guard gate warning system that drops, including laser emitter, distributed optical fiber sensor, transmission optic fibre, optical signal processing module and alarm module, wherein distributed optical fiber sensor evenly distributed is on the guard gate board, laser emitter, distributed optical fiber sensor, transmission optic fibre and optical signal processing module connect gradually and form complete return circuit, optical signal processing module detects the pulse signal that laser emitter sent, optical signal processing module can reverse transmission pulse signal fix a position the optic fibre breakpoint that spare part drops and leads to on the guard gate, optical signal processing module with alarm module connects. The situation that the protection door drops is judged along with the falling of the door body mainly through arranging the optical fiber on the surface of the door body, and the situation that the protection door drops can only be monitored after the protection door drops and cannot be predicted in advance is timely processed, so that safety accidents can be caused due to processing delay.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides a protection door monitoring system with distributed sensing optical fiber serial arrangement, and vibration, deformation and switching information of a plurality of protection doors are monitored simultaneously by connecting optical fiber sensors arranged on the protection doors in series, so that the situation that the protection doors fall off is predicted according to the vibration deformation information, and safety accidents are timely processed and avoided.
In order to achieve the above purpose, the invention provides a protection door monitoring system with distributed sensing optical fiber serial arrangement, which comprises a data transmission optical fiber, an optical fiber sensor, a light source for continuously emitting optical signals with different frequencies, an optical circulator connected with the light source, a photoelectric detector connected with the output end of the optical circulator and a data processor connected with the photoelectric detector;
The optical fiber sensors are arranged on the protective door to sense vibration, deformation and switching information of the protective door body, and the optical fiber sensors on the protective door at different positions are different in frequency of receiving optical signals so as to position the protective door body;
The optical fiber sensors on the plurality of protection doors are connected in series, and the transmission optical fibers are arranged between the adjacent optical fiber sensors and between the optical circulator and the optical fiber sensors so as to form a finished optical loop among the light source, the optical fiber sensors and the photoelectric detector, thereby realizing the monitoring of the plurality of protection doors simultaneously.
Further, the optical fiber sensor is arranged in the door body of the protective door.
Further, the optical fiber sensor is arranged along a lateral direction of the protective door.
Further, the optical fiber sensor covers the door body frame, the hinge and the door closer of the protective door.
Further, the system also comprises an alarm module, and the alarm module is connected with the data processor.
As another aspect of the present invention, there is provided a method for monitoring a protection door of a distributed sensing optical fiber serial arrangement, including the steps of:
S1, a light source emits light signals with different frequencies, and optical fiber sensors on each protection door are set to receive the light signals with different frequencies;
s2, transmitting the optical signal to a transmission optical fiber through an optical circulator;
S3, sequentially transmitting the optical signals to the optical fiber sensors arranged in series through the transmission optical fibers;
S4, sending the optical signals with the corresponding frequencies into a modulator in the optical fiber sensor, and obtaining modulated optical signals by the parameter interaction of a protective door body in the modulator;
s5, transmitting the modulated optical signals with different frequencies into the optical circulator, and receiving and converting the modulated optical signals into electric signals by a photoelectric detector;
And S6, the electric signals are transmitted to a data processor, and the specific deformation, vibration and door opening and closing information of the protective door are obtained through the processing of the data processor.
Further, the parameters of the door body of the protective door comprise displacement, speed and acceleration information of the door body.
Further, in step S5, the photodetector converts the modulated optical signals with different frequencies into electrical signals corresponding to the frequency information, so as to correspond the parameters of the door body of the protection door to the positions of the door body.
Further, the optical fiber sensors arranged in series are distributed on the protective door within the range of 100 KM.
In general, the above technical solutions conceived by the present invention, compared with the prior art, enable the following beneficial effects to be obtained:
(1) According to the monitoring system for the protective doors arranged in the distributed sensing optical fiber serial manner, the optical fiber sensors arranged on the protective doors are connected in series, so that simultaneous monitoring of vibration, deformation and switching information of the protective doors is realized; the light source continuously emits light signals with different frequencies, the frequencies of the light signals received by the optical fiber sensors on the corresponding protection doors at different positions are different, the position information of the corresponding protection doors is obtained through the frequency of the light signals finally received by the photoelectric detector, and vibration, deformation and door opening and closing information of the corresponding protection doors are obtained through reading information carried by the frequency light signals, so that the situation that the protection doors fall off is predicted according to the vibration deformation information, and safety accidents are timely processed and avoided.
(2) According to the distributed sensing optical fiber tandem-arrangement protective door monitoring system, the optical fiber sensor is arranged in the door body of the protective door, the optical fiber sensor positioned on the surface of the protective door is easily influenced by other factors such as piston wind, errors exist in measured data, even false alarm can occur, and the optical fiber sensor is of an integrated structure with the door body and is positioned in the door body, so that the vibration and deformation related information of the door body of the protective door can be more accurately sensed; the optical fiber sensor arranged inside is protected by the door body so as to avoid the influence of piston wind and other external factors, and avoid the damage of the optical fiber sensor and the loss of the monitoring function on the protective door.
(3) According to the distributed sensing optical fiber tandem-arrangement protective door monitoring system, the optical fiber sensors are covered on the door body frame, the hinge and the door closer of the protective door, the door body frame of the protective door is a frame of the protective door, deformation and falling situations of the door body frame can timely reflect the whole situation of the door body, the hinge and the door closer are important parts of a door body switch, and information of the protective door switch can be timely known through sensing and transmission of the optical fiber sensors which are covered on the hinge and the door closer, so that related problems can be timely processed, and the safety of railway tunnel operation is guaranteed.
(4) According to the monitoring method for the protective door arranged in the distributed sensing optical fiber serial mode, the light source continuously emits the optical signals with different frequencies, different receiving frequencies are set for each optical fiber sensor arranged in the serial mode, the position information of the protective door is corresponding to the receiving frequency of the feedback optical signals, and the vibration, deformation and switching information of the corresponding protective door are obtained through the feedback of the relative information of the displacement, the speed and the acceleration of the protective door carried by the optical signals, so that the monitoring of the protective door is more accurate, and meanwhile, the effect of forecasting and early warning is achieved.
Drawings
FIG. 1 is a schematic diagram of a guard gate monitoring system with distributed sensing fiber optic trains in accordance with an embodiment of the present invention.
Wherein: 1-photoelectric host, 101-light source, 102-optical circulator, 103-photoelectric detector, 201-first optical fiber sensor, 202-second optical fiber sensor, 203-third optical fiber sensor, 3-data processor, 4-guard gate, 5-transmission optical fiber.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
FIG. 1 is a schematic diagram of a guard gate monitoring system with distributed sensing fiber optic trains in accordance with an embodiment of the present invention. As shown in fig. 1, the protection door monitoring system of the present invention includes a photo-electric host 1, a transmission optical fiber 5, an optical fiber sensor and a data processor, wherein the photo-electric host 1 includes a light source 101, an optical circulator 102 and a photo-detector 103, the light source 101 emits light signals and transmits the light signals through the optical circulator 102, the transmitted light signals are received by the photo-detector 103, and the photo-detector 103 converts the received light signals into electrical signals; the photoelectric detector 103 is connected with the data processor 3, converts the received optical signals into electric signals, and feeds the electric signals back to the data processor 3, and the data processor 3 processes the electric signals to obtain corresponding vibration and deformation information.
Preferably, the light source 101 emits light signals of different frequencies in succession and is transmitted through the light circulator 102.
Wherein, the guard gate in the tunnel arranges the setting in proper order, set up fiber sensor on the single guard gate, all set up fiber sensor on a plurality of tunnel guard gates of arranging the setting in proper order, and the fiber sensor series connection on a plurality of guard gates of arranging the setting in proper order, if the first fiber sensor 201 that sets up respectively on the guard gate that sets up in proper order, the second fiber sensor 202, the third fiber sensor 203, set up a plurality of fiber sensor in proper order in series, every fiber sensor is the optical sensitivity structure, fiber sensor is used for catching the displacement of guard gate door body, speed and acceleration's information, the deformation or the information of closing the door through the displacement information of the door body can be judged, the relevant information of vibration can be judged through speed and acceleration information combination displacement information.
The working principle of the optical fiber sensor is that the light beam incident by the light source is sent into the modulator through the optical fiber, and the light beam interacts with external measured parameters in the modulator, wherein the measured parameters are information parameters of displacement, speed and acceleration of the door body, and the optical properties of the light, such as intensity, wavelength, frequency, phase, polarization state and the like of the light are changed after the interaction, so that the modulated light signal is formed.
Preferably, the optical fiber sensor is arranged in the door body of the protective door, is arranged in the door body and is manufactured together with the protective door when the protective door is manufactured, and is positioned in the door body, on one hand, the optical fiber sensor positioned on the surface of the protective door is easily influenced by other factors such as piston wind, and the like, and the measured data have errors and even possibly have false alarm, and because the door body is of an integral structure and is positioned in the door body, the optical fiber sensor can more accurately sense the related information of the vibration and the deformation of the door body of the protective door; on the other hand, the optical fiber sensor arranged inside is protected by the door body so as to avoid the influence of piston wind and other external factors, avoid the damage of the optical fiber sensor and lose the monitoring effect on the protective door.
Further, the optical fiber sensor covers the door frame of the protective door body, the hinge and the door closer, the door frame of the protective door is a frame of the protective door, deformation and falling situations of the door frame can timely reflect the whole situation of the door body, the hinge and the door closer are important parts of the door body switch, information of the protective door switch can be timely known through sensing and transmission of the optical fiber sensor distributed on the hinge and the door closer, related problems are timely processed, and safety of railway tunnel operation is guaranteed.
The transmission optical fiber 5 is arranged between two adjacent optical fiber sensors, a plurality of optical fiber sensors are connected into a whole through the transmission optical fiber 5, further, the optical fiber sensors 5 are also arranged between the photoelectric host 1 and the optical fiber sensors, through the transmission of the optical fiber sensors 5, the optical signals emitted by the light source in the photoelectric host 1 are transmitted to the optical fiber sensors on the protective door through the optical circulator and are sequentially transmitted to the optical fiber sensors which are sequentially connected in series, the vibration and deformation information of the door body forms modulated optical signals through the action of the optical fiber sensors, the modulated optical signals return to the optical circulator 102 and are converted into electric signals after being received by the photoelectric detector 103, and finally, the corresponding vibration and deformation information is obtained through the processing of the electric signals through the data processor 3.
Preferably, the frequency of the optical signal received by the optical fiber sensor on each protection door is different, only the optical signal optical fiber sensor with the corresponding frequency can receive the optical signal, and the relevant parameter information of the vibration and the deformation of the corresponding protection door body is processed to form a modulated optical signal, the modulated optical signal is returned to the optical circulator 102, and the optical detector 103 acquires the position information of the protection door according to the frequency of the optical signal, so that the vibration and the deformation information of the corresponding protection door is obtained.
Further, when the protection door falls or falls, the optical fiber sensor breaks along with the protection door, so that the connection between the optical circulator 102 and the optical fiber sensor is disconnected, and the protection door suddenly falls or falls when no return optical signal is received, so that the protection door is processed in time.
Preferably, the protection door monitoring system further comprises an alarm module, wherein the alarm module is connected with the data processor, and when the data processor indicates that the protection door has falling and dumping risks according to the information of the protection door acquired by the optical fiber sensor, namely the deformation or vibration amplitude of the protection door reaches a certain limit value, the alarm module sends alarm information to prompt that the protection door needs to be repaired or replaced in time.
A protection door monitoring method of a distributed sensing optical fiber serial comprises the following steps:
S1, a light source 101 emits light signals with different frequencies, optical fiber sensors on each protective door are set to receive the light signals with different frequencies, the optical fiber sensors with the optical signals with non-corresponding frequencies do not receive the light signals, the frequency information corresponds to the position information of the protective door, and the position where the protective door can be clearly deformed, fallen or toppled through the frequency;
s2, the optical signal is transmitted to the transmission optical fiber 5 through the optical circulator 102;
s3, sequentially transmitting the optical signals to each optical fiber sensor arranged in series through a transmission optical fiber 5;
The protection doors which are sequentially arranged side by side are respectively provided with an optical fiber sensor, the optical fiber sensors are connected in a serial connection mode, and the related information of the protection doors within the range of 100KM can be measured in the serial connection mode, so that the simultaneous monitoring of a plurality of protection doors is realized;
S4, sending the optical signals with the corresponding frequencies into a modulator in the optical fiber sensor, and obtaining modulated optical signals by the parameter interaction of a protective door body in the modulator;
The parameters of the protective door body comprise displacement, speed and acceleration information of the door body, namely vibration, deformation and opening and closing information of the protective door;
s5, transmitting the modulated optical signals with different frequencies to the optical circulator 102, and receiving the modulated optical signals by the photoelectric detector 103, wherein the photoelectric detector 103 converts the modulated optical signals with different frequencies into electric signals with corresponding frequency information, namely, the position information of the protective door and the information of vibration, deformation and switch can be obtained according to the electric signals;
s6, the electric signal is transmitted to the data processor 3, and the specific deformation, vibration and door opening and closing information of the protective door are obtained through the processing of the data processor, so that the protective door is processed in time when a problem occurs, and safety accidents are avoided.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (7)
1. The system is characterized by further comprising a light source (101) for continuously emitting light signals with different frequencies, an optical circulator (102) connected with the light source (101), a photoelectric detector (103) connected with the output end of the optical circulator (102) and a data processor (3) connected with the photoelectric detector (103); the system also comprises an alarm module, wherein the alarm module is connected with the data processor (3);
The optical fiber sensors are arranged in the door body of the protective door to sense vibration, deformation and switching information of the protective door body, and the optical fiber sensors on the protective door at different positions are different in frequency of receiving optical signals so as to position the protective door body;
The optical fiber sensors on the plurality of protection doors are connected in series, the transmission optical fibers (5) are arranged between the adjacent optical fiber sensors and between the optical circulator (102) and the optical fiber sensors so as to form a finished optical loop among the light source (101), the optical fiber sensors and the photoelectric detector (103), and the monitoring of the plurality of protection doors is realized at the same time; the vibration and deformation information of the door body forms a modulated optical signal through the action of the optical fiber sensor, and the optical signal returns to the optical circulator (102); and is received by a photoelectric detector (103) and then converted into an electric signal, and finally the electric signal is processed by a data processor (3) to obtain corresponding vibration and deformation information.
2. A distributed sensing fiber optic tandem guard gate monitoring system in accordance with claim 1 wherein said fiber optic sensors are disposed transversely of said guard gate.
3. A distributed sensing fiber optic tandem guard gate monitoring system as claimed in claim 1 or 2 wherein said fiber optic sensor also overlies the gate frame, hinges and door closers of said guard gate.
4. A method of monitoring a guard gate monitoring system in a distributed sensing fiber optic train arrangement as claimed in any one of claims 1 to 3, comprising the steps of:
s1, a light source (101) emits light signals with different frequencies, and optical fiber sensors on each protection door are set to receive the light signals with different frequencies;
S2, transmitting the optical signal to a transmission optical fiber (5) through an optical circulator (102);
S3, sequentially transmitting the optical signals to the optical fiber sensors arranged in series through the transmission optical fibers (5);
S4, sending the optical signals with the corresponding frequencies into a modulator in the optical fiber sensor, and obtaining modulated optical signals by the parameter interaction of a protective door body in the modulator;
S5, transmitting the modulated optical signals with different frequencies into the optical circulator (102), and receiving and converting the modulated optical signals into electric signals by the photoelectric detector (103);
S6, the electric signals are transmitted to a data processor (3), and specific deformation, vibration and door opening and closing information of the protective door are obtained through processing of the data processor.
5. The method of claim 4, wherein the parameters of the door body of the guard door include displacement, velocity, acceleration information of the door body.
6. The monitoring method according to claim 4 or 5, characterized in that in step S5, the photodetector (103) converts the modulated optical signals of different frequencies into electrical signals corresponding to frequency information, so as to correspond the parameters of the door body of the protective door to the position of the door body.
7. The method of monitoring according to claim 4 or 5, wherein the fiber sensors arranged in series are distributed on a guard gate in the range of 100 KM.
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