CN108692746A - Sensor monitoring terminal, sensing and monitoring system and sensor monitoring method - Google Patents
Sensor monitoring terminal, sensing and monitoring system and sensor monitoring method Download PDFInfo
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- CN108692746A CN108692746A CN201710218073.1A CN201710218073A CN108692746A CN 108692746 A CN108692746 A CN 108692746A CN 201710218073 A CN201710218073 A CN 201710218073A CN 108692746 A CN108692746 A CN 108692746A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 162
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000003287 optical effect Effects 0.000 claims abstract description 221
- 238000012360 testing method Methods 0.000 claims abstract description 92
- 239000000835 fiber Substances 0.000 claims abstract description 58
- 239000013307 optical fiber Substances 0.000 claims abstract description 39
- 238000001514 detection method Methods 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 7
- 238000000253 optical time-domain reflectometry Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000002452 interceptive effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/268—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light using optical fibres
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
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Abstract
The invention discloses a kind of sensor monitoring terminal, sensing and monitoring system and sensor monitoring methods, wherein sensor monitoring terminal includes light path distributor, it is sent to main fiber sensing unit for testing optical signal by externally input first, and tests optical signal by externally input second and is sent to backup optical fiber sensing unit;And the second return optical signal for receiving the first return optical signal exported by main fiber sensing unit and being exported by backup optical fiber sensing unit;First, which returns to optical signal and second, returns to optical signal, the object to be measured state for determining sensor monitoring terminal position.It is connected by optical cable between sensing host, sensing backup machine and several sensor monitoring terminals, constitutes sensing and monitoring system.When Single Point of Faliure occurs for cable link, the sensor monitoring terminal behind cable link fault point still can be monitored normally the present invention, so as to improve the reliability of optic-fiber monitoring system.
Description
Technical field
The present invention relates to technical field of optical fiber communication, more particularly to a kind of sensor monitoring terminal, sensing and monitoring system and biography
Feel monitoring method.
Background technology
With the high speed development of modern society, the application of optical fiber sensing monitoring is more and more extensive.As shown in Figure 1, existing
Sensing and monitoring system includes sensing host, cable link and the multiple sensor monitoring terminals being connected in series by optical cable, sensing
It can be a variety of different types of fibre optical sensors to monitor terminal, the fibre optical sensor may be mounted in object to be measured or
Be connected (existing object to be measured includes but not limited to fiber cable cross connection box, well lid, gas piping etc.) with object to be measured, and passes through
Optical cable is connected with sensing host;Sensing host is responsible for sending test optical signal to each sensor monitoring terminal, and acquisition is each in real time
The optical signal that a sensor monitoring terminal returns to the optical signal of return analyze and then judges object to be measured state.
However, in existing sensing and monitoring system, once somewhere optical cable breaks down (such as fractureing), behind fault point
Sensor monitoring terminal is disconnected with sensing host, and then leads to not be monitored the sensor monitoring terminal behind fault point.
Invention content
In order to solve the above technical problem, the present invention provides a kind of sensor monitoring terminal, sensing and monitoring system and sensings
Monitoring method, when ensureing that Single Point of Faliure occurs for transmission cable, the object to be measured behind fault point still can be monitored normally.
In order to reach the object of the invention, what the technical solution of the embodiment of the present invention was realized in:
An embodiment of the present invention provides a kind of sensor monitoring terminal, including light path distributor and distributed respectively with light path
Main fiber sensing unit that device is connected, backup optical fiber sensing unit, wherein
The light path distributor is sent to the main fiber sensing list for testing optical signal by externally input first
Member, and test optical signal by externally input second and be sent to the backup optical fiber sensing unit;And for receiving by key light
The first of fine sensing unit output returns to optical signal and returns to optical signal by the second of the output of backup optical fiber sensing unit;
The main fiber sensing unit, for receiving the first test optical signal from light path distributor, and output the
One returns to optical signal to light path distributor;
The backup optical fiber sensing unit for receiving the second test optical signal from light path distributor, and exports
Second returns to optical signal to light path distributor;
Described first, which returns to optical signal and second, returns to optical signal, for determining the to be measured of sensor monitoring terminal position
Dbjective state.
Further, the first return optical signal and second returns to the characteristic information of optical signal with the state of object to be measured
Respective change occurs for variation, and the characteristic information includes at least one in light signal energy, wavelength of optical signal, optical signal phase
Kind.
Further, the light path distributor is equipped with main signal port, backup signal port, main split port and backup
Branch port, wherein
Main split port is connected with main fiber sensing unit;
Backup branch port is connected with backup optical fiber sensing unit;
When from main signal port input first test optical signal when, light path distributor by first test optical signal export to
Backup signal port and the main fiber sensing unit being connect with main split port, main fiber sensing unit output corresponding first
Optical signal is returned to main split port, and is exported the first return optical signal to main signal port by light path distributor;
When from backup signal port input the second test optical signal, light path distributor exports the second test optical signal
To main signal port and the backup optical fiber sensing unit being connect with backup branch port, backup optical fiber sensing unit the output phase is answered
The second return optical signal to backing up branch port, and the second return optical signal is exported to backup signal by light path distributor
Port.
Further, the light path distributor is Two In and Two Out power splitter.
Further, the light path distributor be equipped with main signal port, backup signal port, the first main split port,
Second main split port, the first backup branch port and the second backup branch port, wherein
First main split port is connected with main fiber sensing unit respectively with the second main split port;
The first backup branch port is connected with backup optical fiber sensing unit respectively with the second backup branch port;
When from main signal port input first test optical signal when, light path distributor by first test optical signal export to
Backup signal port, the first main split port and the second main split port, from the first main split port and the second main split port
First test optical signal of output returns to optical signal by becoming first after main fiber sensing unit, and respectively from the second main split
Port and first main split's port input light path distributor, are exported by light path distributor to main signal port;
When from backup signal port input the second test optical signal, light path distributor exports the second test optical signal
To main signal port, the first backup branch port and the second backup branch port, backed up from the first backup branch port and second
Branch port output second test optical signal by after backup optical fiber sensing unit become second return optical signal, and respectively from
Second backup branch port and the first backup branch port input light path distributor are exported to backup by light path distributor and are believed
Number port.
Further, the light path distributor goes out power splitter for three into three.
The embodiment of the present invention additionally provides a kind of sensing including the sensor monitoring terminal described in several any of the above items
Monitoring system further includes sensing host, main-slave control cell, sensing backup machine, between the sensor monitoring terminal, sensor monitoring
It connects to form optical cable chain by optical cable respectively between terminal and sensing host and between sensor monitoring terminal and sensing backup machine
Road, wherein
Sensing host is arranged in one end of cable link, for sending the first test optical signal to each sensor monitoring end
End receives each sensor monitoring terminal returns first and returns to optical signal, determined according to the first return light signal characteristic each
The object to be measured state of a sensor monitoring terminal position;
Main-slave control cell, for the state according to cable link, setting sensing host and the Working mould for sensing backup machine
Formula:When cable link fault-free, by sensing Host Detection object to be measured state;When cable link breaks down, pass through
Sense host and/or sensing backup machine testing object to be measured state;
The other end in cable link is arranged in sensing backup machine, sends the second test optical signal to sensing backup machine and failure
Each sensor monitoring terminal between point receives each sensor monitoring terminal returns second and returns to optical signal, according to described the
Two return light signal characteristics determine the object to be measured state of each sensor monitoring terminal position.
Further, at least one in the sensing host, sensing backup machine is additionally operable to, and passes through optical time domain reflectometry skill
Art periodically judges the state of the cable link, and the state of cable link is sent to main-slave control cell.
The embodiment of the present invention additionally provides a kind of sensor monitoring side using the sensor monitoring terminal described in any of the above item
Method includes the following steps:
Main-slave control cell control sensing host senses the state that backup machine judges cable link;According to cable link
State, setting sensing host and the operating mode for sensing backup machine;
Occur when cable link fault-free or between sensing backup machine and first sensor monitoring terminal being attached thereto
When failure, sensing host and the operating mode for sensing backup machine are:It senses host and sends the first test optical signal to each sensing
Monitor terminal;Sensing backup machine does not detect object to be measured state;
Each sensor monitoring terminal returns to corresponding first return optical signal to sensing host;
Sensing host receives each sensor monitoring terminal returns first and returns to optical signal, and it is true to return to optical signal according to first
The object to be measured state of fixed each sensor monitoring terminal position;
When breaking down between sensing host and first sensor monitoring terminal being attached thereto, host and sensing are sensed
The operating mode of backup machine is:It senses backup machine and sends the second test optical signal to each sensor monitoring terminal;Sense host not
Detect object to be measured state;
Each sensor monitoring terminal returns to corresponding second return optical signal to sensing backup machine;
Sensing backup machine receives each sensor monitoring terminal returns second and returns to optical signal, and optical signal is returned according to second
Determine the object to be measured state of each sensor monitoring terminal position;
When first sensor monitoring terminal being connected with sensing host and first sensing being connected with sensing backup machine are supervised
When the cable link surveyed between terminal breaks down, sensing host and the operating mode for sensing backup machine are:Host is sensed to send
First test optical signal;It senses backup machine and sends the second test optical signal;
Each sensor monitoring terminal between sensing host and fault point returns to the first return optical signal to sensing host, with
And each sensor monitoring terminal between sensing backup machine and fault point returns to the second return optical signal to sensing backup machine;
Sensing host and sensing backup machine are respectively received the first return optical signal and second and return to optical signal, according to first
Return light signal characteristic and the second return light signal characteristic determine the object to be measured state of each sensor monitoring terminal position.
Further, the main-slave control cell control sensing host or sensing backup machine judge the state of cable link,
It specifically includes:
At least one in the sensing host or sensing backup machine is periodically judged by Optical time domain reflectance
The state of cable link, and the state of cable link is sent to the main-slave control cell;
The main-slave control cell judges that cable link has fault-free according to the state of the cable link of reception.
Technical scheme of the present invention has the advantages that:
Sensor monitoring terminal, monitoring system and monitoring method provided by the invention, by being arranged in sensor monitoring terminal
Light path distributor and backup optical fiber sensing unit, when Single Point of Faliure occurs for optical cable, the object to be measured behind fault point still may be used
Normally to be monitored, the reliability of optical fiber sensing monitoring system is improved.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and is constituted part of this application, this hair
Bright illustrative embodiments and their description are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of existing sensing and monitoring system;
Fig. 2 is the structural schematic diagram of the sensor monitoring terminal of first embodiment of the invention;
Fig. 3 is the structural schematic diagram of the sensor monitoring terminal of second embodiment of the invention;
Fig. 4 is the structural schematic diagram of the monitoring system of the embodiment of the present invention;
Fig. 5 is the flow diagram of the monitoring method of the embodiment of the present invention.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention
Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application
Feature mutually can arbitrarily combine.
With reference to Fig. 2, a kind of sensor monitoring terminal according to the present invention, including light path distributor and respectively with light path point
Main fiber sensing unit, the backup optical fiber sensing unit being connected with device, wherein
The light path distributor is sent to the main fiber sensing list for testing optical signal by externally input first
Member, and test optical signal by externally input second and be sent to the backup optical fiber sensing unit;And for receiving by key light
The first of fine sensing unit output returns to optical signal and returns to optical signal by the second of the output of backup optical fiber sensing unit;
The main fiber sensing unit, for receiving the first test optical signal from light path distributor, and output the
One returns to optical signal to light path distributor;
The backup optical fiber sensing unit for receiving the second test optical signal from light path distributor, and exports
Second returns to optical signal to light path distributor;
Described first, which returns to optical signal and second, returns to optical signal, for determining the to be measured of sensor monitoring terminal position
Dbjective state.
It is worth noting that object to be measured of the present invention is the target of the sensor monitoring terminal detection, including but
It is not limited to fiber cable cross connection box, well lid, gas piping etc., the main fiber sensing unit in sensor monitoring terminal and backup Fibre Optical Sensor
Unit may be mounted in object to be measured or be connected with object to be measured.
Further, the first return optical signal and second returns to the characteristic information of optical signal with the state of object to be measured
Respective change occurs for variation, and the characteristic information includes at least one in light signal energy, wavelength of optical signal, optical signal phase
Kind.
Further, with reference to Fig. 2, the light path distributor is equipped with main signal port, backup signal port, main split end
Mouth and backup branch port, wherein
Main split port is connected with main fiber sensing unit;
Backup branch port is connected with backup optical fiber sensing unit;
When from main signal port input first test optical signal when, light path distributor by first test optical signal export to
Backup signal port and the main fiber sensing unit being connect with main split port, main fiber sensing unit output corresponding first
Optical signal is returned to main split port, and is exported the first return optical signal to main signal port by light path distributor;
When from backup signal port input the second test optical signal, light path distributor exports the second test optical signal
To main signal port and the backup optical fiber sensing unit being connect with backup branch port, backup optical fiber sensing unit the output phase is answered
The second return optical signal to backing up branch port, and the second return optical signal is exported to backup signal by light path distributor
Port.
Specifically, the main fiber sensing unit and backup optical fiber sensing unit are reflective optical sensor.
Specifically, the light path distributor is Two In and Two Out power splitter.
Specifically, the first test optical signal inputted from main signal port, respectively from backup signal port and main split end
Mouth output;The the second test optical signal inputted from backup signal port, exports from main signal port and backup branch port respectively.
First inputted from main split port returns to optical signal, is exported respectively from main signal port and backup branch port;From backup point
The second of branch port input returns to optical signal, is exported respectively from backup signal port and main split port.
Further, when the first test optical signal described from main signal port input, the backup signal port
Output signal power it is bigger than the output signal power of the main split port;When from backup signal port input described the
When two test optical signals, the output signal power of the output signal power of the main signal port than the backup branch port
Greatly.
For example, the first test optical signal inputted from main signal port, respectively from backup signal port and main split port
When output, the ratio of backup signal port and main split's port output signal power is respectively 95% and 5%;From backup signal end
Second test optical signal of mouth input, when being exported respectively from main signal port and backup branch port, main signal port and backup
The ratio of branch port output signal power is respectively 95% and 5%.In this way, the first test light exported from backup signal port
Signal, the second test optical signal exported from main signal port can be exported to more remote from sensing host, sensing backup machine
Sensor monitoring terminal;In addition, since the output signal power ratio of main split port, backup branch port is relatively low, main fiber
Sensing unit and the first return optical signal of backup optical fiber sensing unit output, the second return optical signal influence light between each other
It is micro-.
Further, with reference to Fig. 3, a kind of sensor monitoring terminal according to the present invention, the light path distributor, which is equipped with, to be led
Signal port, backup signal port, the first main split port, the second main split port, the first backup branch port and second are standby
Part branch port, wherein
First main split port is connected with main fiber sensing unit respectively with the second main split port;
The first backup branch port is connected with backup optical fiber sensing unit respectively with the second backup branch port;
When from main signal port input first test optical signal when, light path distributor by first test optical signal export to
Backup signal port, the first main split port and the second main split port, from the first main split port and the second main split port
First test optical signal of output becomes the first return optical signal after reaching main fiber sensing unit, and respectively from the second main split
Port and first main split's port input light path distributor, are exported by light path distributor to main signal port;
When from backup signal port input the second test optical signal, light path distributor exports the second test optical signal
To main signal port, the first backup branch port and the second backup branch port, backed up from the first backup branch port and second
Branch port output second test optical signal reach backup optical fiber sensing unit after become second return optical signal, and respectively from
Second backup branch port and the first backup branch port input light path distributor are exported to backup by light path distributor and are believed
Number port.
Specifically, the main fiber sensing unit and backup optical fiber sensing unit are transmission-type fibre optical sensor.
Specifically, the light path distributor goes out power splitter for three into three.
Further, when the first test optical signal described from main signal port input, the backup signal port
Output signal power it is bigger than the total output signal power of first main split port and the second main split port;When from described
When optical signal is tested in backup signal port input described second, the output signal power of the main signal port is more standby than described first
The total output signal power of part branch port and the second backup branch port is big.
For example, the first test optical signal inputted from main signal port, respectively from backup signal port, the first main split end
When mouth and the port output of the second main split, backup signal port, the first main split port and second main split's port output signal
The ratio of power is respectively 95%, 2.5% and 2.5%;The the second test optical signal inputted from backup signal port, respectively from master
When signal port, the first backup branch port and the second backup branch port export, main signal port, the first backup branch port
Ratio with the second backup branch port output signal power is respectively 95%, 2.5% and 2.5%.In this way, from backup signal end
Mouthful output first test optical signal, from main signal port export second test optical signal can export to from sensing host,
Sense the longer-distance sensor monitoring terminal of backup machine;In addition, due to the first main split port, the second main split port, first
The output signal power ratio of backup branch port and the second backup branch port is relatively low, main fiber sensing unit and backup optical fiber
The first of sensing unit output returns to optical signal, influence is slight between each other for the second return optical signal.
Further, the main fiber sensing unit and backup optical fiber sensing unit can be single fibre optical sensor,
It can also be connected in series by multiple fibre optical sensors.The key light fiber sensor and the backup fibre optical sensor are installed on
In object to be measured.Monitoring optical signal into active/standby part Fibre Optical Sensor unit can be by the shadow of object to be measured state change
It rings, respective change occurs so as to cause Fibre Optical Sensor unit return light signal characteristic information, the characteristic information includes but unlimited
In light signal energy, wavelength of optical signal, optical signal phase.Using the characteristic information of return optical signal it may determine that object to be measured
State.
With reference to Fig. 4, it is whole including the sensor monitoring described in several any of the above items that the embodiment of the invention also discloses a kind of
The sensing and monitoring system at end, the sensing and monitoring system further includes sensing host, main-slave control cell and senses backup machine, described
Distinguish between sensor monitoring terminal, between sensor monitoring terminal and sensing host, between sensor monitoring terminal and sensing backup machine
It connects to form cable link by optical cable, wherein
Sensing host is arranged in one end of cable link, for sending the first test optical signal to each sensor monitoring end
End receives each sensor monitoring terminal returns first and returns to optical signal, each biography is determined according to the first return light signal characteristic
The object to be measured state of sense monitoring terminal position;
Main-slave control cell, for the state according to cable link, setting sensing host and the Working mould for sensing backup machine
Formula:When cable link fault-free, by sensing Host Detection object to be measured state;When cable link breaks down, pass through
Sense host and/or sensing backup machine testing object to be measured state;
Sensing backup machine the other end in cable link is set, for send second test optical signal to sensing backup machine with
Each sensor monitoring terminal between fault point receives each sensor monitoring terminal returns second and returns to optical signal, according to the
Two return light signal characteristics determine the object to be measured state of each sensor monitoring terminal position.
It should be noted that state of the main-slave control cell according to cable link, setting sensing host and sensing are standby
The operating mode of part machine refers to:
(1) when cable link fault-free, main-slave control cell control sensing Host Detection object to be measured state senses standby
Part machine is not used in detection object to be measured state;
(2) when cable link breaks down, it is divided into following three kinds of situations:
(a) when breaking down between sensing backup machine and first sensor monitoring terminal being attached thereto, active and standby control
Unit control sensing Host Detection object to be measured state, sensing backup machine are not used in detection object to be measured state;
(b) when breaking down between sensing host and first sensor monitoring terminal being attached thereto, active and standby control is single
Member control sensing backup machine testing object to be measured state, sensing host are not used in detection object to be measured state;
(c) when first sensor monitoring terminal being connected with sensing host and first sensing being connected with sensing backup machine
When breaking down between monitoring terminal, main-slave control cell control sensing host and sensing backup machine detect object to be measured shape simultaneously
State.
Specifically, the main-slave control cell with sensing host, can be both positioned over different location (described for sensing backup machine
Main-slave control cell, sensing host and sensing backup machine between by wired or wireless network be connected and interactive information), also may be used
To be placed in same equipment (for example, when the sensing and monitoring system is constituted loop network).
Further, at least one in the sensing host, sensing backup machine is additionally operable to, and passes through optical time domain reflectometry
(OTDR) technology cycle judges the state of the cable link, and the state of cable link is sent to main-slave control cell.
The sensing and monitoring system may operate in two kinds of operating modes:
Operating mode one:Optical cable detects
System can control sensing host, sensing backup machine detection optical cable link condition, the technology of use at regular intervals
Including but not limited to optical time domain reflectometer (OTDR) technology.Testing result is divided into cable link without obvious fault, optical cable chain
There are a serious fiber cut failure and cable link, there are more than one serious fiber cut failures on road.
Operating mode two:Sensor monitoring terminal monitoring
According to the testing result of cable link, main-slave control cell is standby using different method control sensing hosts, sensing
Part machine monitors sensor monitoring terminal.
Specifically, if cable link is without obvious fault, main-slave control cell control sensing host supervision sensor monitoring is whole
End senses host output the first test optical signal and enters cable link at this time, and the first test optical signal inputs sensor monitoring terminal
Behind main signal port, two ways of optical signals can be divided by light path distributor, a routing backup signal port output, another way is by leading
Branch port enters key light fiber sensor and is monitored for object to be measured.First test optical signal becomes after entering key light fiber sensor
First returns to optical signal, then enters light path distributor via main split port, then defeated from sensor monitoring terminal main signal port
Go out, eventually returns to sensing host.
It is worth noting that obvious fault of the present invention, refer to causing sensor monitoring terminal that cannot test to be measured
The failure of the state of target.
If cable link there are an obvious fault (such as:Serious fiber cut failure), main-slave control cell control sensing
Host and sensing backup machine monitor sensor monitoring terminal simultaneously, sense host output the first test optical signal at this time and enter optical cable
Link can be divided into two-way light letter after the first test optical signal inputs sensor monitoring terminal main signal port by light path distributor
Number, a routing backup signal port output, another way enters key light fiber sensor by main split port and is monitored for object to be measured.
First test optical signal becomes the first return optical signal after entering key light fiber sensor, then enters light path point via main split port
It is exported with device, then from sensor monitoring terminal main signal port, eventually returns to sensing host.
Meanwhile it sensing backup machine output the second test optical signal and entering cable link, the second test optical signal input sensing
After monitoring terminal backup signal port, two ways of optical signals can be divided by light path distributor, a routing main signal port exports, separately
One route backup branch port enters backup fibre optical sensor and is monitored for object to be measured.Second test optical signal enters backup optical
Become the second return optical signal after fiber sensor, then enter light path distributor via backup branch port, then from sensor monitoring
Terminal backup signal port exports, and eventually returns to sensing backup machine.
Further, if cable link there are more than one obvious fault (such as:Serious fiber cut failure), the sensing
Components of system as directed failure is monitored, main-slave control cell is by the state reporting higher level system of cable link.
With reference to Fig. 5, the embodiment of the invention also discloses a kind of biographies using the sensor monitoring terminal described in any of the above item
Feel monitoring method, includes the following steps:
Main-slave control cell control sensing host senses the state that backup machine judges cable link;According to cable link
State, setting sensing host and the operating mode for sensing backup machine;
Occur when cable link fault-free or between sensing backup machine and first sensor monitoring terminal being attached thereto
When failure, sensing host and the operating mode for sensing backup machine are:It senses host and sends the first test optical signal to each sensing
Monitor terminal;Sensing backup machine does not detect object to be measured state;
Each sensor monitoring terminal returns to the first return optical signal to sensing host;
Sensing host receives each sensor monitoring terminal returns first and returns to optical signal, and it is special to return to optical signal according to first
Sign determines the object to be measured state of each sensor monitoring terminal position;
When breaking down between sensing host and first sensor monitoring terminal being attached thereto, host and sensing are sensed
The operating mode of backup machine is:It senses backup machine and sends the second test optical signal to each sensor monitoring terminal;Sense host not
Detect object to be measured state;
Each sensor monitoring terminal returns to corresponding second return optical signal to sensing backup machine;
Sensing backup machine receives each sensor monitoring terminal returns second and returns to optical signal, and optical signal is returned according to second
Determine the object to be measured state of each sensor monitoring terminal position;
When first sensor monitoring terminal being connected with sensing host and first sensing being connected with sensing backup machine are supervised
When the cable link surveyed between terminal breaks down, sensing host and the operating mode for sensing backup machine are:Host is sensed to send
First test optical signal;It senses backup machine and sends the second test optical signal;
Each sensor monitoring terminal between sensing host and fault point returns to the first return optical signal to sensing host, with
And each sensor monitoring terminal between sensing backup machine and fault point returns to the second return optical signal to sensing backup machine;;
Sensing host and sensing backup machine are respectively received the first return optical signal and second and return to optical signal, according to first
Return light signal characteristic and the second return light signal characteristic determine the object to be measured state of each sensor monitoring terminal position.
Further, the main-slave control cell control sensing host or sensing backup machine judge the state of cable link,
It specifically includes:
At least one in the sensing host or sensing backup machine passes through optical time domain reflectometry (OTDR) technology cycle
Ground judges the state of cable link, and the state of cable link is sent to the main-slave control cell;
The main-slave control cell judges that cable link has fault-free according to the state of the cable link of reception.
Specifically, the main-slave control cell with sensing host, can be both positioned over different location (described for sensing backup machine
Main-slave control cell, sensing host and sensing backup machine between by wired or wireless network be connected and interactive information), also may be used
To be placed in same equipment (for example, when the sensing and monitoring system is constituted loop network).
Further, if cable link there are more than one obvious fault (such as:Serious fiber cut failure), active and standby control
Unit is by the state reporting higher level system of cable link.
Sensor monitoring terminal, monitoring system and monitoring method provided by the invention, by being arranged in sensor monitoring terminal
Light path distributor and backup optical fiber sensing unit, when Single Point of Faliure occurs for optical cable, the object to be measured behind fault point still may be used
Normally to be monitored, so as to improve the reliability of optic-fiber monitoring system.
One of ordinary skill in the art will appreciate that all or part of step in the above method can be instructed by program
Related hardware is completed, and described program can be stored in computer readable storage medium, such as read-only memory, disk or CD
Deng.Optionally, all or part of step of above-described embodiment can also be realized using one or more integrated circuits, accordingly
Ground, the form that hardware may be used in each module/unit in above-described embodiment are realized, the shape of software function module can also be used
Formula is realized.The present invention is not limited to the combinations of the hardware and software of any particular form.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of sensor monitoring terminal, which is characterized in that be connected including light path distributor and respectively with light path distributor
Main fiber sensing unit, the backup optical fiber sensing unit connect, wherein
The light path distributor is sent to the main fiber sensing unit for testing optical signal by externally input first,
And it tests optical signal by externally input second and is sent to the backup optical fiber sensing unit;And it is passed by main fiber for receiving
Feel the first of unit output to return to optical signal and return to optical signal by the second of the output of backup optical fiber sensing unit;
The main fiber sensing unit for receiving the first test optical signal from light path distributor, and exports first and returns
Heliogram is to light path distributor;
The backup optical fiber sensing unit for receiving the second test optical signal from light path distributor, and exports second
Optical signal is returned to light path distributor;
Described first, which returns to optical signal and second, returns to optical signal, the object to be measured for determining sensor monitoring terminal position
State.
2. sensor monitoring terminal according to claim 1, which is characterized in that described first, which returns to optical signal and second, returns
The characteristic information of optical signal with object to be measured state change occur respective change, the characteristic information include light signal energy,
At least one of wavelength of optical signal, optical signal phase.
3. sensor monitoring terminal according to claim 1, which is characterized in that the light path distributor is equipped with main signal end
Mouth, backup signal port, main split port and backup branch port, wherein
Main split port is connected with main fiber sensing unit;
Backup branch port is connected with backup optical fiber sensing unit;
When from main signal port input the first test optical signal, light path distributor exports the first test optical signal to backup
Signal port and the main fiber sensing unit being connect with main split port, main fiber sensing unit output corresponding first return
Optical signal exports the first return optical signal to main signal port to main split port, and by light path distributor;
When from backup signal port input the second test optical signal, light path distributor exports the second test optical signal to master
Signal port and the backup optical fiber sensing unit being connect with backup branch port, backup optical fiber sensing unit output corresponding the
Two return optical signals are exported the second return optical signal to backup signal end by light path distributor to backing up branch port
Mouthful.
4. sensor monitoring terminal according to claim 3, which is characterized in that the light path distributor is Two In and Two Out work(
Divide device.
5. sensor monitoring terminal according to claim 1, which is characterized in that the light path distributor is equipped with main signal end
Mouth, backup signal port, the first main split port, the second main split port, the first backup branch port and the second backup branch
Port, wherein
First main split port is connected with main fiber sensing unit respectively with the second main split port;
The first backup branch port is connected with backup optical fiber sensing unit respectively with the second backup branch port;
When from main signal port input the first test optical signal, light path distributor exports the first test optical signal to backup
Signal port, the first main split port and the second main split port are exported from the first main split port and the second main split port
The first test optical signal return to optical signal by becoming first after main fiber sensing unit, and respectively from the second main split port
With first main split's port input light path distributor, exported to main signal port by light path distributor;
When from backup signal port input the second test optical signal, light path distributor exports the second test optical signal to master
Signal port, the first backup branch port and the second backup branch port, from the first backup branch port and the second backup branch
Second test optical signal of port output returns to optical signal by becoming second after backup optical fiber sensing unit, and respectively from second
Backup branch port and the first backup branch port input light path distributor, are exported by light path distributor to backup signal end
Mouthful.
6. sensor monitoring terminal according to claim 5, which is characterized in that the light path distributor goes out work(for three into three
Divide device.
7. a kind of sensing and monitoring system including any sensor monitoring terminal of several claims 1 to 6, feature exist
In, further include sensing host, main-slave control cell, sensing backup machine, between the sensor monitoring terminal, sensor monitoring terminal and
It connects to form cable link by optical cable respectively between sensing host and between sensor monitoring terminal and sensing backup machine,
In,
Sensing host is arranged in one end of cable link, for sending the first test optical signal to each sensor monitoring terminal, connects
It receives each sensor monitoring terminal returns first and returns to optical signal, each sensing is determined according to the first return light signal characteristic
Monitor the object to be measured state of terminal position;
Main-slave control cell, for the state according to cable link, setting sensing host and the operating mode for sensing backup machine:When
When cable link fault-free, by sensing Host Detection object to be measured state;When cable link breaks down, led by sensing
Machine and/or sensing backup machine testing object to be measured state;
Sensing backup machine is arranged the other end in cable link, send the second test optical signal to sensing backup machine and fault point it
Between each sensor monitoring terminal, receive each sensor monitoring terminal returns second and return to optical signal, returned according to described second
Heliogram feature determines the object to be measured state of each sensor monitoring terminal position.
8. a kind of sensing and monitoring system according to claim 7, which is characterized in that
At least one in the sensing host, sensing backup machine is additionally operable to, and is periodically sentenced by Optical time domain reflectance
The state of the disconnected cable link, and the state of cable link is sent to main-slave control cell.
9. a kind of sensor monitoring method using any sensor monitoring terminal of claim 1 to 6, which is characterized in that packet
It includes:
Main-slave control cell control sensing host senses the state that backup machine judges cable link;According to the shape of cable link
State, setting sensing host and the operating mode for sensing backup machine;
It breaks down when cable link fault-free or between sensing backup machine and first sensor monitoring terminal being attached thereto
When, sensing host and the operating mode for sensing backup machine are:It senses host and sends the first test optical signal to each sensor monitoring
Terminal;Sensing backup machine does not detect object to be measured state;
Each sensor monitoring terminal returns to corresponding first return optical signal to sensing host;
Sensing host receives each sensor monitoring terminal returns first and returns to optical signal, and it is each to return to optical signal determination according to first
The object to be measured state of a sensor monitoring terminal position;
When breaking down between sensing host and first sensor monitoring terminal being attached thereto, sensing host and sensing back up
The operating mode of machine is:It senses backup machine and sends the second test optical signal to each sensor monitoring terminal;Sensing host does not detect
Object to be measured state;
Each sensor monitoring terminal returns to corresponding second return optical signal to sensing backup machine;
Sensing backup machine receives each sensor monitoring terminal returns second and returns to optical signal, and returning to optical signal according to second determines
The object to be measured state of each sensor monitoring terminal position;
When first sensor monitoring terminal being connected with sensing host and first sensor monitoring end being connected with sensing backup machine
When cable link between end breaks down, sensing host and the operating mode for sensing backup machine are:It senses host and sends first
Test optical signal;It senses backup machine and sends the second test optical signal;
Each sensor monitoring terminal between sensing host and fault point returns to the first return optical signal to sensing host, Yi Jichuan
Each sensor monitoring terminal between sense backup machine and fault point returns to the second return optical signal to sensing backup machine;
Sensing host and sensing backup machine are respectively received the first return optical signal and second and return to optical signal, are returned according to first
Optical signal feature and the second return light signal characteristic determine the object to be measured state of each sensor monitoring terminal position.
10. sensor monitoring method according to claim 9, which is characterized in that the main-slave control cell control sensing master
Machine or sensing backup machine judge the state of cable link, specifically include:
At least one in the sensing host or sensing backup machine periodically judges optical cable by Optical time domain reflectance
The state of link, and the state of cable link is sent to the main-slave control cell;
The main-slave control cell judges that cable link has fault-free according to the state of the cable link of reception.
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