Grating array sensor network and method for acquiring distributed sensor information

Abstract

This disclosure provides a grating array sensor network and a method for acquiring distributed sensor information, relating to the field of fiber optic sensing detection technology. The grating sensor array network comprises a grating sensor array, a first optical delay device, a second optical delay device, a first optical splitter, a second optical splitter, a first demodulator, a second demodulator, and a host computer. This allows the grating sensor array network to be combined with time-division multiplexing, space-division multiplexing, and wavelength-division multiplexing technologies, thereby increasing the capacity of the grating sensor array network and enabling comprehensive monitoring of the status of larger objects.

Description

Technical Field

[0001] The present disclosure relates to the field of optical fiber sensing detection technology, and in particular to a grating array sensing network and a method for acquiring distributed sensing information. Background Art

[0002] Appropriate sensors and sensor networks are essential for achieving comprehensive perception and real-time monitoring of the measured object's state. In recent years, fiber Bragg grating (FBG) sensors have been widely researched and utilized due to their high sensitivity, immunity to electromagnetic interference, corrosion resistance, wide dynamic measurement range, compact size, and ease of multiplexing. However, the multiplexing systems used in FBG sensors often employ a serial architecture, resulting in low capacity and difficulty in scalability, making them unsuitable for large-scale measurement objects (e.g., mines and dams). Summary of the Invention

[0003] The present disclosure aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] A first embodiment of the present disclosure provides a grating array sensor network, comprising:

[0005] Grating sensor array, first optical delay device, second optical delay device, first optical splitter, second optical splitter, first demodulator, second demodulator and host computer;

[0006] Wherein, the first port of each of the grating sensor arrays is connected to the first port of a different first optical delay device, and the second port of each of the grating sensor arrays is connected to the first port of a different second optical delay device;

[0007] A plurality of the grating sensor arrays and a first optical delay device and a second optical delay device connected to the plurality of the grating sensor arrays form a group of grating sensor arrays;

[0008] The second ports of the plurality of first optical delay devices in each group of grating sensor arrays are connected together and connected to each first port of the first optical splitter;

[0009] The second ports of the plurality of second optical delay devices in each group of the grating sensor array are connected together and connected to each first port of the second optical splitter;

[0010] The second port of the first optical splitter is connected to the first port of the first demodulator;

[0011] The second port of the second optical splitter is connected to the first port of the second demodulator;

[0012] The second port of the first demodulator is connected to the host computer;

[0013] The second port of the second demodulator is connected to the host computer.

[0014] Optionally, the grating sensor array is composed of two or more grating sensors with different central wavelengths connected in series.

[0015] Optionally, the host 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.

[0016] Optionally, a first delay time corresponding to a first optical delay device connected to the grating sensor array is the same as a second delay time corresponding to a second optical delay device connected thereto.

[0017] Optionally, the first delay time corresponding to each first optical delay device in each group of grating sensor arrays is different.

[0018] A second embodiment of the present disclosure provides a method for acquiring distributed sensor information based on a grating array sensor network, characterized by comprising:

[0019] The host 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;

[0020] The first optical splitter splits the first light source into multiple first optical signals, and sends each first optical signal to the first optical delay device of each group of grating sensor arrays; the second optical splitter splits the second light source into multiple second optical signals, and sends each second optical signal to the second optical delay device of each group of grating sensor arrays;

[0021] Each of the first optical delay devices 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 of the second optical delay devices controls the second optical signal to be sent to the corresponding grating sensor array based on the corresponding second delay time;

[0022] The first demodulator and the second demodulator respectively demodulate the received optical pulse signals returned by each grating sensor array to determine the central wavelength change corresponding to each grating sensor in each grating sensor array, and send the central wavelength change to the host computer;

[0023] The host computer determines the measurement data corresponding to each grating sensor according to the received central wavelength change corresponding to each grating sensor;

[0024] The host computer generates distributed sensing information corresponding to the measured object based on the measurement data corresponding to each grating sensor and the position information of each grating sensor in the measured object.

[0025] Optionally, the host computer determines the measurement data corresponding to each grating sensor according to the received central wavelength variation corresponding to each grating sensor, including:

[0026] Based on the central wavelength variation corresponding to each of the grating sensors, a mapping table corresponding to each of the grating sensors is queried to determine the measurement data corresponding to each of the grating sensors.

[0027] Optionally, after generating the distributed sensing information corresponding to the measured object, the method further includes:

[0028] The host computer controls the display interface to display the distributed sensing information.

[0029] Optionally, after generating the distributed sensing information corresponding to the measured object, the method further includes:

[0030] The host computer sends the distributed sensing information to a server of a distributed message processing system, so that a terminal device in the distributed message processing system can obtain sensing data from the server.

[0031] Optionally, after determining the central wavelength variation corresponding to each grating sensor in each grating sensor array, the method further includes:

[0032] The central wavelength variation corresponding to each of the grating sensors is sent to a server of a distributed message processing system, so that a terminal device in the distributed message processing system can obtain the central wavelength variation corresponding to each of the grating sensors from the server.

[0033] The grating array sensor network and the method for obtaining distributed sensor information provided by the present disclosure have the following characteristics:

[0034] Beneficial effects:

[0035] In the disclosed embodiments, a grating sensor array network is combined with time division multiplexing technology, space division multiplexing technology, and wavelength division multiplexing technology, thereby increasing the capacity of the grating sensor array network under the conditions permitted by demodulation speed, processing speed, time accuracy, positioning accuracy, and system assembly complexity, thereby providing conditions for comprehensive monitoring of the status of larger objects under test.

[0036] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0038] Figure 1 A schematic diagram of the structure of a grating array sensor network provided in one embodiment of the present disclosure;

[0039] Figure 2 A schematic flow chart of a distributed sensing information acquisition method provided by another embodiment of the present disclosure;

[0040] Figure 3 A schematic diagram of local deployment of a distributed message processing system provided by an embodiment of the present disclosure;

[0041] Figure 4 A schematic diagram of cluster distributed deployment of a distributed message processing system provided in one embodiment of the present disclosure;

[0042] Figure 5 A block diagram of an exemplary electronic device suitable for implementing embodiments of the present disclosure is shown. DETAILED DESCRIPTION

[0043] The following describes in detail embodiments of the present disclosure, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present disclosure, and should not be construed as limiting the present disclosure.

[0044] The following describes the grating array sensor network and the method for acquiring distributed sensor information according to the embodiments of the present disclosure with reference to the accompanying drawings.

[0045] Figure 1 A schematic diagram of the structure of a grating array sensor network provided in one embodiment of the present disclosure.

[0046] like Figure 1 As shown, the grating array sensor network may include: a grating sensor 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 a host computer;

[0047] The first port of each grating sensor array is connected to the first port of a different first optical delay device, and the second port of each grating sensor array is connected to the first port of a different second optical delay device;

[0048] A plurality of grating sensor arrays and a first optical delay device and a second optical delay device connected to the plurality of grating sensor arrays form a group of grating sensor arrays;

[0049] The second ports of the plurality of first optical delay devices in each group of the grating sensor array are connected together and connected to each first port of the first optical splitter;

[0050] The second ports of the plurality of second optical delay devices in each group of the grating sensor array are connected together and connected to each first port of the second optical splitter;

[0051] The second port of the first optical splitter is connected to the first port of the first demodulator;

[0052] The second port of the second optical splitter is connected to the first port of the second demodulator;

[0053] The second port of the first demodulator is connected to the host computer;

[0054] The second port of the second demodulator is connected to the host computer.

[0055] The optical splitter can distribute multiple groups of grating sensor arrays to different channel units. Figure 1 As shown, the first optical splitter includes multiple first ports, each connected to a group of grating sensor arrays. The second optical splitter includes multiple first ports, each connected to a group of grating sensor arrays. This combines the grating array sensor network with space division multiplexing (SDM) technology, increasing the capacity of the grating array sensor network.

[0056] Optionally, the grating sensor array is composed of two or more grating sensors with different central wavelengths connected in series, thereby forming a coded grating sensor array. Figure 1 As shown, the central wavelengths corresponding to the grating sensors G1 and G2 in the grating sensor array may be the same or different, and the central wavelengths corresponding to the grating sensors Gn and Gn-1 may be the same or different. This disclosure does not limit this.

[0057] Optionally, the host computer controls the first light source emitted by the first demodulator and controls the 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.

[0058] Optionally, a first delay time corresponding to a first optical delay device connected to the grating sensor array is the same as a second delay time corresponding to a second optical delay device connected thereto.

[0059] For example, Figure 1 As shown, 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 .

[0060] Optionally, each first optical delay device in each group of grating sensor arrays corresponds to a different first delay time, thereby combining the grating array sensor network with time-division multiplexing (TDM) technology to increase the capacity of the grating array sensor network.

[0061] For example, Figure 1 As shown, in a group of grating sensor arrays, the first optical delay device 1, the first optical delay device 2, ..., and the first optical delay device m respectively correspond to different first delay times.

[0062] It should be noted that if Figure 1 The grating sensor array network shown may also include multiple sub-grating sensor array networks controlled by multiple first and second demodulators. This can increase the number of nodes in the grating sensor network and enable sensing of the status information of large objects (e.g., dams, mines, etc.). This is not limited in this disclosure.

[0063] In the disclosed embodiments, a grating sensor array network is combined with time division multiplexing technology, space division multiplexing technology, and wavelength division multiplexing technology, thereby increasing the capacity of the grating sensor array network under the conditions permitted by demodulation speed, processing speed, time accuracy, positioning accuracy, and system assembly complexity, thereby providing conditions for comprehensive monitoring of the status of larger objects under test.

[0064] Figure 2 This is a flow chart of a distributed sensing information acquisition method provided by another embodiment of the present disclosure; Figure 2 As shown, the distributed sensing information acquisition method may include the following steps:

[0065] In step 201 , the host 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.

[0066] In step 202, the first optical splitter divides the first light source into multiple first optical signals, and sends each first optical signal to the first optical delay device of each group of grating sensor arrays. The second optical splitter divides the second light source into multiple second optical signals, and sends each second optical signal to the second optical delay device of each group of grating sensor arrays.

[0067] like Figure 1 As shown, the first optical splitter can split the first light source into p first optical signals, each of which is identical. The third first optical signal is sent to each first delay unit of one group of grating sensor arrays, and the fourth first optical signal is sent to each first delay unit of another group of grating sensor arrays. Similarly, the second optical splitter can split the second light source into p second optical signals, each of which is identical. The third second optical signal is sent to each second delay unit of one group of grating sensor arrays, and the fourth second optical signal is sent to each second delay unit of another group of grating sensor arrays.

[0068] In step 203, each first optical delay device 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 delay device controls the second optical signal to be sent to the corresponding grating sensor array based on the corresponding second delay time.

[0069] like Figure 1 As shown, if the third path of the first optical signal is simultaneously sent to the first delay device 1-first delay device n of a group of grating sensor arrays, each first delay device can control the third path of the first optical signal 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, and the first delay time corresponding to the first delay device n is 30 seconds. Then, at 1 second, the third path of the first optical signal only enters the grating sensor array connected to the first delay device 1; then, at 5 seconds, the third path of the first optical signal only enters the grating sensor array connected to the first delay device 2. This disclosure is not limited to this.

[0070] In step 204 , the first demodulator and the second demodulator respectively demodulate the received optical pulse signals returned by each grating sensor array to determine the central wavelength variation corresponding to each grating sensor in each grating sensor array, and send the central wavelength variation to the host computer.

[0071] It is understandable that after the optical signal enters the grating sensor array, it will receive the optical pulse signal reflected by the grating sensor array and demodulate the optical pulse signal to determine the central wavelength change corresponding to each grating sensor in the grating sensor array.

[0072] Step 205 : The host computer determines the measurement data corresponding to each grating sensor according to the received central wavelength variation corresponding to each grating sensor.

[0073] Optionally, the host computer may query a mapping table corresponding to each grating sensor based on the central wavelength variation corresponding to each grating sensor to determine the measurement data corresponding to each grating sensor.

[0074] The mapping table may be pre-stored in a database by the host computer, and includes a mapping relationship between the central wavelength variation corresponding to each type of grating sensor and the measurement data.

[0075] It should be noted that different types of grating sensors correspond to different types of measurement data. Optionally, the grating sensor may include a strain sensor, a temperature sensor, a displacement sensor, a pressure sensor, and the like. If the grating sensor is a temperature sensor, the corresponding measurement data is a temperature value. If the grating sensor is a strain sensor, the corresponding measurement data is a stress value. This disclosure is not limited to this.

[0076] In step 206 , the host computer generates distributed sensing information corresponding to the measured object based on the measurement data corresponding to each grating sensor and the position information of each grating sensor in the measured object.

[0077] Optionally, the host computer controls the display interface to display the distributed sensing information, thereby intuitively displaying the status information corresponding to each position on the measured object.

[0078] In an embodiment of the present disclosure, a large number of grating sensors contained in a grating sensor array network are deployed on the object to be measured. The measurement data corresponding to each grating sensor is then used to generate distributed sensing information corresponding to the object to be measured, thereby achieving real-time and accurate monitoring of the status of a larger object to be measured.

[0079] Figure 3 A local deployment diagram of a distributed message processing system provided by an embodiment of the present disclosure is shown as follows: Figure 3 As shown, the distributed message processing system includes a grating sensor array network (ie Figure 3 FBG sensor network), server, and terminal equipment.

[0080] FBG sensor network users acquire distributed sensor information corresponding to their equipment. Multiple stress fields deployed with the FBG sensor network act as producers in the distributed message processing system. This distributed sensor information is transmitted via the FBG sensor network's network interface card (NIC) to the distributed message processing system's server, the broker. To improve network throughput, batch writes can be configured to the broker, a process known as an active push mode. Terminal devices, responding to equipment sensor information, act as consumers of the distributed message processing system, actively extracting information from the broker using a pull mode. These devices then perform real-time display, calculation, and processing of this distributed sensor information. Therefore, the distributed message processing system not only enables efficient transmission but also supports the processing of distributed sensor information streams.

[0081] In actual applications, the consumer and server running online processing operations in the distributed message processing system can be deployed in the same local center or the producer and server can be deployed together, depending on the situation. This disclosure does not limit this.

[0082] Optionally, the host computer in the grating sensor array network can send distributed sensing information to the server of the distributed message processing system, so that the terminal devices in the distributed message processing system can obtain sensing data from the server.

[0083] Optionally, the demodulator in the grating sensor array network can also send the center wavelength change corresponding to each grating sensor to the server of the distributed message processing system, so that the terminal device in the distributed message processing system can obtain the center wavelength change corresponding to each grating sensor from the server.

[0084] like Figure 3 As shown, to meet the needs of offline processing of big data sensor information, a distributed message processing system can also be deployed in the offline processing center, typically physically adjacent to the big data database system (Database) or data warehouse (Hadoop HBase). Data can be pulled on demand from the on-site data center through an embedded consumer set and stored in the database system through jobs, completing functions such as batch storage of sensor information, offline analysis, and information mining. Furthermore, random access requests for some sensor data streams can also be supported through appropriate script design and the data application model of the distributed message processing system.

[0085] Figure 4 A schematic diagram of cluster distributed deployment of a distributed message processing system provided in one embodiment of the present disclosure is shown as follows: Figure 4 As shown in the figure, it consists of multiple local data centers and a set of local / remote data centers. The sensor information of the FBG sensor network is transmitted to the local data center through a distributed message processing system. The remote data center retains the view information of multiple local data centers and is connected to multiple local data centers through the network for information backup or offline processing. The distributed message processing system still runs between multiple data centers. The remote data center pulls sensor information from different local data centers through an embedded consumer set, which is equivalent to the consumer role of the local data center. At the same time, the remote data center and the local data center also have information exchange functions. For example, the results of offline processing of some sensor information can be pushed to them as the producer and broker of the local data center. It can be seen that in the multi-data center transmission mode based on the distributed message processing system, the data centers act as consumers and producers to complete the information exchange function.

[0086] Figure 5 A block diagram of an exemplary electronic device suitable for implementing embodiments of the present disclosure is shown. Figure 5 The electronic device 12 shown is only an example and should not limit the functionality and scope of use of the embodiments of the present disclosure.

[0087] like Figure 5As shown, electronic device 12 is implemented as 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, system memory 28, and a bus 18 that connects various system components (including system memory 28 and processing unit 16).

[0088] 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, or a local bus using any of a variety of bus architectures. Examples of such architectures include, but are not limited to, the Industry Standard Architecture (ISA) bus, the Micro Channel Architecture (MAC) bus, the Enhanced ISA bus, the Video Electronics Standards Association (VESA) local bus, and the Peripheral Component Interconnection (PCI) bus.

[0089] The computer device 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by the computer device 12, including volatile and non-volatile media, removable and non-removable media.

[0090] The memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. The computer device 12 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, the storage system 34 may be configured to read and write non-removable, non-volatile magnetic media ( Figure 5 Not shown, often called a "hard drive"). Although Figure 5Although not shown, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk"), and an optical disk drive for reading and writing to a removable non-volatile optical disk (e.g., a Compact Disc Read Only Memory (hereinafter referred to as: CD-ROM), a Digital Video Disc Read Only Memory (hereinafter referred to as: DVD-ROM), or other optical media) may be provided. In these cases, each drive may be connected to the bus 18 via one or more data medium interfaces. The memory 28 may include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of the various embodiments of the present disclosure.

[0091] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in memory 28. Such program modules 42 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may include an implementation of a network environment. Program modules 42 generally implement the functions and / or methods of the embodiments described herein.

[0092] The computer device 12 can also communicate with one or more external devices 14 (e.g., a keyboard, pointing device, display 24, etc.), one or more devices that enable a user to interact with the computer device 12, and / or any device that enables the computer device 12 to communicate with one or more other computing devices (e.g., a network card, a modem, etc.). This communication can occur via an input / output (I / O) interface 22. Furthermore, the computer device 12 can communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network such as the Internet) via a network adapter 20. As shown, the network adapter 20 communicates with the other modules of the computer device 12 via a bus 18. It should be understood that, although not shown, other hardware and / or software modules can be used in conjunction with the computer device 12, including but not limited to microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0093] The processing unit 16 executes various functional applications and data processing by running programs stored in the system memory 28, such as implementing the methods mentioned in the above embodiments.

[0094] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and features of different embodiments or examples, unless they are mutually inconsistent.

[0095] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0096] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present disclosure includes additional implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure belong.

[0097] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and a portable compact disc read-only memory (CDROM). Furthermore, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing it in another suitable manner if necessary, and then storing it in a computer memory.

[0098] It should be understood that various parts of the present disclosure can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0099] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0100] In addition, the functional units in the various embodiments of the present disclosure may be integrated into a single processing module, or each unit may exist physically separately, or two or more units may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or in the form of software functional modules. If the integrated modules are implemented in the form of software functional modules and sold or used as independent products, they may also be stored in a computer-readable storage medium.

[0101] The storage medium mentioned above may be a read-only memory, a magnetic disk, or an optical disk, etc. Although the embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. A person of ordinary skill in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A grating array sensor network, characterized in that: include: A grating sensor array, a plurality of first optical delay devices, a plurality of second optical delay devices, a first optical splitter, a second optical splitter, a first demodulator, a second demodulator and a host computer; Wherein, the first port of each of the grating sensor arrays is connected to the first port of a different first optical delay device, and the second port of each of the grating sensor arrays is connected to the first port of a different second optical delay device; A plurality of the grating sensor arrays and a first optical delay device and a second optical delay device connected to the plurality of the grating sensor arrays form a group of grating sensor arrays; The second ports of the plurality of first optical delay devices in each group of grating sensor arrays are connected together and connected to each first port of the first optical splitter; The second ports of the plurality of second optical delay devices in each group of the grating sensor array are connected together and connected to each first port of the second optical splitter; The second port of the first optical splitter is connected to the first port of the first demodulator; The second port of the second optical splitter is connected to the first port of the second demodulator; The second port of the first demodulator is connected to the host computer; The second port of the second demodulator is connected to the host computer; The grating sensor array is composed of two or more grating sensors with different central wavelengths connected in series; The host computer controls a first light source emitted by the first demodulator and controls a second light source emitted by the second demodulator, wherein a first bandwidth corresponding to the first light source is different from a second bandwidth corresponding to the second light source; The first delay time corresponding to the first optical delay device connected to the grating sensor array is the same as the second delay time corresponding to the second optical delay device connected thereto; The first delay time corresponding to each first optical delay device in each group of grating sensor arrays is different.

2. A method for acquiring distributed sensor information based on the grating array sensor network according to claim 1, characterized in that: include: The host 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; The first optical splitter splits the first light source into multiple first optical signals, and sends each first optical signal to the first optical delay device of each group of grating sensor arrays; the second optical splitter splits the second light source into multiple second optical signals, and sends each second optical signal to the second optical delay device of each group of grating sensor arrays; Each of the first optical delay devices 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 of the second optical delay devices controls the second optical signal to be sent to the corresponding grating sensor array 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 to determine the central wavelength change corresponding to each grating sensor in each grating sensor array, and send the central wavelength change to the host computer; The host computer determines the measurement data corresponding to each grating sensor according to the received central wavelength change corresponding to each grating sensor; The host computer generates distributed sensing information corresponding to the measured object based on the measurement data corresponding to each grating sensor and the position information of each grating sensor in the measured object.

3. The method according to claim 2, characterized in that The host computer determines the measurement data corresponding to each grating sensor according to the received central wavelength change corresponding to each grating sensor, including: Based on the central wavelength variation corresponding to each of the grating sensors, a mapping table corresponding to each of the grating sensors is queried to determine the measurement data corresponding to each of the grating sensors.

4. The method according to claim 2, characterized in that After generating the distributed sensing information corresponding to the measured object, the method further includes: The host computer controls the display interface to display the distributed sensing information.

5. The method according to claim 2, characterized in that After generating the distributed sensing information corresponding to the measured object, the method further includes: The host computer sends the distributed sensing information to a server of a distributed message processing system, so that a terminal device in the distributed message processing system can obtain sensing data from the server.

6. The method according to claim 2, characterized in that After determining the central wavelength variation corresponding to each grating sensor in each grating sensor array, the method further includes: The central wavelength variation corresponding to each of the grating sensors is sent to a server of a distributed message processing system, so that a terminal device in the distributed message processing system can obtain the central wavelength variation corresponding to each of the grating sensors from the server.

Images