CN116295552A - Grating array sensing network and acquisition method of distributed sensing information - Google Patents

Abstract

The disclosure provides a grating array sensing network and a distributed sensing information acquisition method, and relates to the technical field of optical fiber sensing detection. The grating sensing array network comprises a grating sensing array, a first optical delay device, a second delay device, a first optical splitter, a second optical splitter, a first demodulator, a second demodulator and an upper computer. Therefore, the grating sensing array network can be combined with a time division multiplexing technology, a space division multiplexing technology and a wavelength division multiplexing technology, so that the capacity of the grating sensing array network is improved, and conditions are provided for comprehensively monitoring the state of a measured object with a large volume.

Description

Grating array sensing network and acquisition method of distributed sensing information

Technical Field

The disclosure relates to the technical field of optical fiber sensing detection, in particular to a grating array sensing network and a distributed sensing information acquisition method.

Background

The proper sensor and sensing network are the basis for realizing the comprehensive sensing and real-time monitoring of the state of the detected object. In recent years, fiber bragg grating sensors have been widely studied and utilized because of their advantages of high sensitivity, electromagnetic interference resistance, corrosion resistance, wide dynamic measurement range, small volume, easy multiplexing, and the like. However, the multiplexing system used in the fiber bragg grating sensor adopts a serial structure, has small capacity and is difficult to expand, and is not suitable for large-sized objects to be measured (such as mines, dams and the like).

Disclosure of Invention

The present disclosure aims to solve, at least to some extent, one of the technical problems in the related art.

An embodiment of a first aspect of the present disclosure provides a grating array sensor network, including:

the system comprises a grating sensing array, a first optical delay device, a second delay device, a first optical divider, a second optical divider, a first demodulator, a second demodulator and an upper computer;

the first port of each grating sensing array is connected with the first port of a different first optical delay device, and the second port of each grating sensing array is connected with the first port of a different second optical delay device;

the first optical delay device and the second delay device are connected with the grating sensing arrays to form a group of grating sensing arrays;

the second ports of the first optical delays in each group of grating sensing arrays are connected together and are connected with each first port of the first optical splitter;

the second ports of the plurality of second optical delays in each group of grating sensing arrays are connected together and are connected with each first port of the second optical splitter;

the second port of the first optical splitter is connected with the first port of the first demodulator;

the second port of the second optical splitter is connected with the first port of the second demodulator;

the second port of the first demodulator is connected with the upper computer;

and a second port of the second demodulator is connected with the upper computer.

Optionally, the grating sensor array is formed by connecting two or more grating sensors with different center wavelengths in series.

Optionally, the upper computer controls the first light source emitted by the first demodulator and controls the second light source emitted by the second demodulator, and the first bandwidth corresponding to the first light source is different from the second bandwidth corresponding to the second light source.

Optionally, the first delay time corresponding to the first optical delay device connected with the grating sensing array is the same as the second delay time corresponding to the second optical delay device connected with the grating sensing array.

Optionally, the first delay time corresponding to each first optical delay device in each group of grating sensing arrays is different.

An embodiment of a second aspect of the present disclosure provides a method for acquiring distributed sensing information based on a grating array sensing network, which is characterized by comprising:

the upper computer controls the first demodulator to emit a first light source to the first optical splitter, and the second demodulator to emit a second light source to the second optical splitter;

the first optical splitter splits the first light source into multiple paths of first optical signals and sends each path of first optical signals to the first optical delay device of each group of grating sensing arrays, and the second optical splitter splits the second light source into multiple paths of second optical signals and sends each path of second optical signals to the second optical delay device of each group of grating sensing arrays;

each first optical delayer in each group of grating sensing arrays controls the first optical signals to be sent to the corresponding grating sensing arrays based on the corresponding first delay time, and each second optical delayer controls the second optical signals to be sent to the corresponding grating sensing arrays based on the corresponding second delay time;

the first demodulator and the second demodulator respectively demodulate the received optical pulse signals returned by each grating sensor array so as to determine the central wavelength variation corresponding to each grating sensor in each grating sensor array, and send the central wavelength variation to an upper computer;

the upper computer determines measurement data corresponding to each grating sensor according to the received central wavelength variation corresponding to each grating sensor;

and the upper computer generates distributed sensing information corresponding to the measured object according to the measurement data corresponding to each grating sensor and the position information of each grating sensor in the measured object.

Optionally, the determining, by the upper computer, measurement data corresponding to each grating sensor according to the received central wavelength variation corresponding to each grating sensor includes:

and inquiring a mapping table corresponding to each grating sensor based on the central wavelength variation corresponding to each grating sensor so as to determine measurement data corresponding to each grating sensor.

Optionally, after the generating the distributed sensing information corresponding to the measured object, the method further includes:

and the upper computer controls a display interface to display the distributed sensing information.

Optionally, after the generating the distributed sensing information corresponding to the measured object, the method further includes:

and the upper computer sends the distributed sensing information to a server of a distributed message processing system, so that terminal equipment in the distributed message processing system can acquire sensing data from the server.

Optionally, after determining the central wavelength variation corresponding to each grating sensor in each grating sensor array, the method further includes:

and sending the central wavelength variation corresponding to each grating sensor to a server of a distributed message processing system, so that terminal equipment in the distributed message processing system can acquire the central wavelength variation corresponding to each grating sensor from the server.

The grating array sensing network and the distributed sensing information acquisition method provided by the disclosure have the following steps

The beneficial effects are that:

in the embodiment of the disclosure, the grating sensing array network is combined with the time division multiplexing technology, the space division multiplexing technology and the wavelength division multiplexing technology, so that the capacity of the grating sensing array network is improved under the conditions of demodulation speed, processing speed, time precision, positioning precision and system construction complexity, thereby providing conditions for comprehensively monitoring the state of a measured object with larger volume.

Additional aspects and advantages of the disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure.

Drawings

The foregoing and/or additional aspects and advantages of the present disclosure will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of a grating array sensor network according to an embodiment of the disclosure;

fig. 2 is a flowchart of a distributed sensing information acquisition method according to another embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a local deployment of a distributed message processing system according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of a clustered distributed deployment of a distributed message processing system according to an embodiment of the present disclosure;

fig. 5 illustrates a block diagram of an exemplary electronic device suitable for use in implementing embodiments of the present disclosure.

Detailed Description

Embodiments of the present disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present disclosure and are not to be construed as limiting the present disclosure.

The grating array sensing network and the distributed sensing information acquisition method according to the embodiments of the present disclosure are described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a grating array sensor network according to an embodiment of the disclosure.

As shown in fig. 1, the grating array sensor network may include: the system comprises a grating sensing array, a first optical delay device, a second delay device, a first optical divider, a second optical divider, a first demodulator, a second demodulator and an upper computer;

the first port of each grating sensing array is connected with the first port of a different first optical delay device, and the second port of each grating sensing array is connected with the first port of a different second optical delay device;

the first optical delayer and the second delayer connected with the plurality of grating sensing arrays form a group of grating sensing arrays;

the second ports of the first optical delays in each group of grating sensing arrays are connected together and are connected with each first port of the first optical splitter;

the second ports of the plurality of second optical delays in each group of grating sensing arrays are connected together and are connected with each first port of the second optical splitter;

the second port of the first optical splitter is connected with the first port of the first demodulator;

the second port of the second optical splitter is connected with the first port of the second demodulator;

the second port of the first demodulator is connected with the upper computer;

the second port of the second demodulator is connected with the upper computer.

The optical splitter may distribute groups of grating sensor arrays over different channel units. As shown in fig. 1, the first optical splitter includes a plurality of first ports, each of which is connected to a set of grating sensor arrays, and the second optical splitter includes a plurality of first ports, each of which is connected to a set of grating sensor arrays. Therefore, the grating array sensing network and the space division multiplexing (Space Division Multiplexing, SDM) technology are combined, and the capacity of the grating array sensing network is improved.

Alternatively, the grating sensor array is formed by connecting two or more grating sensors with different center wavelengths in series, thereby forming a coded grating sensor array. As shown in fig. 1, the center wavelengths corresponding to the grating sensors G1 and G2 in the grating sensor array may be the same or different, and the center wavelengths corresponding to the grating sensors Gn and Gn-1 may be the same or different. The present disclosure is not limited in this regard.

Optionally, the upper computer controls a first light source emitted by the first demodulator and controls a second light source emitted by the second demodulator, and a first bandwidth corresponding to the first light source is different from a second bandwidth corresponding to the second light source.

Optionally, the first delay time corresponding to the first optical delay device connected with the grating sensing array is the same as the second delay time corresponding to the second optical delay device connected with the grating sensing array.

For example, as shown in fig. 1, the first delay time corresponding to the first optical delay device 1 is the same as the second delay time corresponding to the second optical delay device 1.

Optionally, the first delay time corresponding to each first optical delay device in each group of grating sensing arrays is different. Therefore, the grating array sensing network and a time-division multiplexing (time-division multiplexing, TDM) technology can be combined, and the capacity of the grating array sensing network is improved.

For example, as shown in fig. 1, in a group of grating sensor arrays, the first delay times corresponding to the first optical delay device 1, the first optical delay devices 2 and … …, and the first optical delay device m are different.

It should be noted that, as shown in fig. 1, the grating sensor array network may further include a plurality of sub-grating sensor array networks controlled by a plurality of first demodulators and a plurality of second demodulators. Therefore, nodes contained in the grating sensing network can be increased, and the sensing of state information of large objects (such as dams, mines and the like) is realized. The present disclosure is not limited in this regard.

In the embodiment of the disclosure, the grating sensing array network is combined with the time division multiplexing technology, the space division multiplexing technology and the wavelength division multiplexing technology, so that the capacity of the grating sensing array network is improved under the conditions of demodulation speed, processing speed, time precision, positioning precision and system construction complexity, thereby providing conditions for comprehensively monitoring the state of a measured object with larger volume.

Fig. 2 is a flowchart of a distributed sensing information acquisition method according to another embodiment of the present disclosure; as shown in fig. 2, the distributed sensing information acquisition method may include the steps of:

in step 201, the upper computer controls the first demodulator to transmit the first light source to the first optical splitter, and the second demodulator to transmit the second light source to the second optical splitter.

In step 202, the first optical splitter splits the first light source into multiple paths of first optical signals and sends each path of first optical signals to the first optical delay device of each group of grating sensor arrays, and the second optical splitter splits the second light source into multiple paths of second optical signals and sends each path of second optical signals to the second optical delay device of each group of grating sensor arrays.

As shown in fig. 1, the first optical splitter may split the first optical source into p paths of first optical signals, where each path of first optical signal is the same, where the 3 rd path of first optical signal is sent to each first delay device of one set of grating sensor arrays, and the 4 th path of first optical signal is sent to each first delay device of another set of grating sensor arrays. Similarly, the second optical splitter may split the second light source into p paths of second optical signals, where each path of second optical signal is identical, and the 3 rd path of second optical signal is sent to each second delay device of one set of grating sensing arrays, and the 4 th path of second optical signal is sent to each second delay device of another set of grating sensing arrays.

In step 203, each first optical delayer in each group of grating sensor arrays controls the first optical signal to be sent to the corresponding grating sensor array based on the corresponding first delay time, and each second optical delayer controls the second optical signal to be sent to the corresponding grating sensor array based on the corresponding second delay time.

As shown in fig. 1, if the 3 rd path of the first optical signals are simultaneously sent to the first delays 1-n of the group of grating sensor arrays, each first delay may control the 3 rd path of the first optical signals to perform the corresponding grating sensor array according to the corresponding first delay time. For example, the first delay time corresponding to the first delay device 1 is 1 second, the first delay time corresponding to the first delay device 2 is 5 seconds, the first delay time corresponding to the first delay device n is 30 seconds, and then the 3 rd path of first optical signals only enter the grating sensing array connected with the first delay device 1 when the first delay time is 1 s; and at 5s, the 3 rd path of first optical signals only enter the grating sensing array connected with the first delayer 2. The present disclosure is not limited in this regard.

In step 204, the first demodulator and the second demodulator demodulate the received optical pulse signals returned by each grating sensor array, so as to determine the central wavelength variation corresponding to each grating sensor in each grating sensor array, and send the central wavelength variation to the upper computer.

It will be appreciated that after entering the grating sensor array, the optical signal receives the optical pulse signal reflected by the grating sensor array, and demodulates the optical pulse signal to determine the amount of change in the center wavelength corresponding to each grating sensor in the grating sensor array.

In step 205, the upper computer determines measurement data corresponding to each grating sensor according to the received central wavelength variation corresponding to each grating sensor.

Optionally, the upper computer may query a mapping table corresponding to each grating sensor based on the central wavelength variation corresponding to each grating sensor, so as to determine measurement data corresponding to each grating sensor.

The mapping table may be pre-stored in a database for the upper computer, and includes a mapping relationship between the central wavelength variation corresponding to each type of grating sensor and the measurement data.

It should be noted that the types of the grating sensors are different, and the types of the corresponding measurement data are also different. Alternatively, the type of grating sensor may include a strain sensor, a temperature sensor, a displacement sensor, a pressure sensor, and the like. If the type of the grating sensor is a temperature sensor, the corresponding measurement data is a temperature value. If the type of the grating sensor is a strain sensor, the corresponding measurement data is stress. The present disclosure is not limited in this regard.

In step 206, the upper computer generates distributed sensing information corresponding to the measured object according to the measurement data corresponding to each grating sensor and the position information of each grating sensor in the measured object.

Optionally, the upper computer controls the display interface to display the distributed sensing information, so that state information corresponding to each position on the measured object can be intuitively displayed.

According to the embodiment of the disclosure, a large number of grating sensors contained in the grating sensor array network are deployed on the measured object, and then distributed sensing information corresponding to the measured object is generated through measurement data corresponding to each grating sensor, so that real-time and accurate monitoring of the state of the measured object with a large volume is realized.

Fig. 3 is a schematic diagram of a local deployment of a distributed message processing system according to an embodiment of the present disclosure, where, as shown in fig. 3, the distributed message processing system includes a grating sensor array network (i.e., the FBG sensor network in fig. 3), a server (server), and a terminal device.

The FBG sensing network user obtains distributed sensing information corresponding to equipment, a plurality of stress fields of the FBG sensing network are deployed as producers (producers) of the distributed message processing system, and the distributed sensing information is transmitted to a server, namely a brooker end, of the distributed message processing system through a network interface (Network Interface Card, NIC) of the FBG sensing network. To increase network throughput, a batch write mode may be configured to the browser, which is the active push mode. The requirement of the terminal equipment on the equipment sensing information is used as a consumer of the distributed message processing system, the information is actively extracted from the reader end by adopting an acquisition (pull) mode, and the functions of real-time display, real-time calculation, real-time processing and the like of the distributed sensing information are completed. Thus, the distributed message processing system not only has the capability of efficient transmission, but also provides support for distributed sensory information stream processing.

In practical applications, a consumer and a server running online processing operations in a distributed message processing system may be deployed in the same local center or a producer and a server may be deployed together according to circumstances. The present disclosure is not limited in this regard.

Optionally, the upper computer in the grating sensing array network may send the distributed sensing information to a server of the distributed message processing system, so that the terminal device in the distributed message processing system may obtain the sensing data from the server.

Optionally, the demodulator in the grating sensor array network may also send the central wavelength variation corresponding to each grating sensor to a server of the distributed message processing system, so that the terminal device in the distributed message processing system may obtain the central wavelength variation corresponding to each grating sensor from the server.

As shown in fig. 3, in order to satisfy the offline processing operation of the big data sensing information, a distributed message processing system may be deployed in an offline processing center, and is generally physically adjacent to a big data Database system (Database) or a data warehouse (Hadoop HBase), and the functions of sensing information batch storage, offline analysis, information mining and the like are completed by pushing data from a field data center as required through an embedded consumer set and storing the data into the Database system in an operation mode. Meanwhile, for the access request of the random retrieval of partial sensing data information flow, the data application mode of the distributed message processing system can be used for supporting through proper script design.

FIG. 4 is a schematic diagram of a clustered distributed deployment of a distributed message processing system according to one embodiment of the present disclosure, as shown in FIG. 4, which is composed of a plurality of local data centers and a local/remote data center set. The sensing information of the FBG sensing network is transmitted to a local data center through a distributed message processing system. The remote data center is used for maintaining view information of a plurality of local data centers, and is connected with the plurality of local data centers through a network for information backup or offline processing. The distributed message processing system still operates among the plurality of data centers, and the remote data centers sense information from different local data centers pull through the embedded consumer set, which is equivalent to the consumer role of the local data centers. Meanwhile, the remote data center and the local data center also have information interaction functions, such as the results of off-line processing of some sensing information, and the like, and can be used as roles of a local data center producer and a reader to carry out push operation. Therefore, in a multi-data center transmission mode based on the distributed message processing system, the data centers are mutually a consumer and a producer to complete the function of information interaction.

Fig. 5 illustrates a block diagram of an exemplary electronic device suitable for use in implementing embodiments of the present disclosure. The electronic device 12 shown in fig. 5 is merely an example and should not be construed to limit the functionality and scope of use of embodiments of the present disclosure in any way.

As shown in fig. 5, the electronic device 12 is in the form of a general purpose computing device. Components of computer device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, a bus 18 that connects the various system components, including the system memory 28 and the processing units 16.

Bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor, and a local bus using any of a variety of bus architectures. By way of example, and not limitation, such architectures include industry Standard architecture (Industry Standard Architecture; hereinafter ISA) bus, micro channel architecture (Micro Channel Architecture; hereinafter MAC) bus, enhanced ISA bus, video electronics standards Association (Video Electronics Standards Association; hereinafter VESA) local bus, and peripheral component interconnect (Peripheral Component Interconnection; hereinafter PCI) bus.

Computer device 12 typically includes a variety of computer system readable media. Such media can be any available media that is accessible by computer device 12 and includes both volatile and nonvolatile media, removable and non-removable media.

Memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (Random Access Memory; hereinafter: RAM) 30 and/or cache memory 32. The computer device 12 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 34 may be used to read from or write to non-removable, nonvolatile magnetic media (not shown in FIG. 5, commonly referred to as a "hard disk drive"). Although not shown in fig. 5, a magnetic disk drive for reading from and writing to a removable non-volatile magnetic disk (e.g., a "floppy disk"), and an optical disk drive for reading from or writing to a removable non-volatile optical disk (e.g., a compact disk read only memory (Compact Disc Read Only Memory; hereinafter CD-ROM), digital versatile read only optical disk (Digital Video Disc Read Only Memory; hereinafter DVD-ROM), or other optical media) may be provided. In such cases, each drive may be coupled to bus 18 through one or more data medium interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules configured to carry out the functions of the various embodiments of the disclosure.

A program/utility 40 having a set (at least one) of program modules 42 may be stored in, for example, memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment. Program modules 42 generally perform the functions and/or methods in the embodiments described in this disclosure.

The computer device 12 may also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), one or more devices that enable a user to interact with the computer device 12, and/or any devices (e.g., network card, modem, etc.) that enable the computer device 12 to communicate with one or more other computing devices. Such communication may occur through an input/output (I/O) interface 22. Moreover, the computer device 12 may also communicate with one or more networks such as a local area network (Local Area Network; hereinafter LAN), a wide area network (Wide Area Network; hereinafter WAN) and/or a public network such as the Internet via the network adapter 20. As shown, network adapter 20 communicates with other modules of computer device 12 via bus 18. It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with computer device 12, including, but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.

The processing unit 16 executes various functional applications and data processing by running programs stored in the system memory 28, for example, implementing the methods mentioned in the foregoing embodiments.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present disclosure, the meaning of "a plurality" is at least two, such as two, three, etc., unless explicitly specified otherwise.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and additional implementations are included within the scope of the preferred embodiment of the present disclosure in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present disclosure.

Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.

It should be understood that portions of the present disclosure may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. As with the other embodiments, if implemented in hardware, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.

Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.

Furthermore, each functional unit in the embodiments of the present disclosure may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.

The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like. Although embodiments of the present disclosure have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the present disclosure, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the present disclosure.

Claims (10)

1. A raster array sensing network, comprising: the system comprises a grating sensing array, a first optical delay device, a second delay device, a first optical divider, a second optical divider, a first demodulator, a second demodulator and an upper computer;

the first port of each grating sensing array is connected with the first port of a different first optical delay device, and the second port of each grating sensing array is connected with the first port of a different second optical delay device;

the first optical delay device and the second delay device are connected with the grating sensing arrays to form a group of grating sensing arrays;

the second ports of the first optical delays in each group of grating sensing arrays are connected together and are connected with each first port of the first optical splitter;

the second ports of the plurality of second optical delays in each group of grating sensing arrays are connected together and are connected with each first port of the second optical splitter;

the second port of the first optical splitter is connected with the first port of the first demodulator;

the second port of the second optical splitter is connected with the first port of the second demodulator;

the second port of the first demodulator is connected with the upper computer;

and a second port of the second demodulator is connected with the upper computer.

2. The grating array sensor network of claim 1, wherein the grating sensor array is comprised of two or more grating sensors of different center wavelengths in series.

3. The grating array sensor network of claim 1, wherein the upper computer controls a first light source emitted by the first demodulator and controls a second light source emitted by the second demodulator, and a first bandwidth corresponding to the first light source is different from a second bandwidth corresponding to the second light source.

4. The grating array sensor network of claim 1, wherein a first delay time corresponding to a first optical delay device connected to the grating array sensor network is the same as a second delay time corresponding to a second optical delay device connected to the grating array sensor network.

5. The grating array sensor network of claim 4, wherein the first delay time corresponding to each first optical delay in each set of grating array is different.

6. A method for obtaining distributed sensing information based on the grating array sensing network according to any one of claims 1 to 5, comprising:

the upper computer controls the first demodulator to emit a first light source to the first optical splitter, and the second demodulator to emit a second light source to the second optical splitter;

the first optical splitter splits the first light source into multiple paths of first optical signals and sends each path of first optical signals to the first optical delay device of each group of grating sensing arrays, and the second optical splitter splits the second light source into multiple paths of second optical signals and sends each path of second optical signals to the second optical delay device of each group of grating sensing arrays;

each first optical delayer in each group of grating sensing arrays controls the first optical signals to be sent to the corresponding grating sensing arrays based on the corresponding first delay time, and each second optical delayer controls the second optical signals to be sent to the corresponding grating sensing arrays based on the corresponding second delay time;

the first demodulator and the second demodulator respectively demodulate the received optical pulse signals returned by each grating sensor array so as to determine the central wavelength variation corresponding to each grating sensor in each grating sensor array, and send the central wavelength variation to an upper computer;

the upper computer determines measurement data corresponding to each grating sensor according to the received central wavelength variation corresponding to each grating sensor;

and the upper computer generates distributed sensing information corresponding to the measured object according to the measurement data corresponding to each grating sensor and the position information of each grating sensor in the measured object.

7. The method of claim 6, wherein the determining, by the host computer, measurement data corresponding to each grating sensor according to the received central wavelength variation corresponding to each grating sensor, includes:

and inquiring a mapping table corresponding to each grating sensor based on the central wavelength variation corresponding to each grating sensor so as to determine measurement data corresponding to each grating sensor.

8. The method of claim 6, further comprising, after the generating the distributed sensing information corresponding to the object under test:

and the upper computer controls a display interface to display the distributed sensing information.

9. The method of claim 6, further comprising, after the generating the distributed sensing information corresponding to the object under test:

and the upper computer sends the distributed sensing information to a server of a distributed message processing system, so that terminal equipment in the distributed message processing system can acquire sensing data from the server.

10. The method of claim 6, further comprising, after said determining the amount of change in the center wavelength for each grating sensor in each grating sensor array:

and sending the central wavelength variation corresponding to each grating sensor to a server of a distributed message processing system, so that terminal equipment in the distributed message processing system can acquire the central wavelength variation corresponding to each grating sensor from the server.

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