CN112284684A - Optical fiber sensor data acquisition device and system for monitoring machine body structure state - Google Patents
Optical fiber sensor data acquisition device and system for monitoring machine body structure state Download PDFInfo
- Publication number
- CN112284684A CN112284684A CN202011126569.4A CN202011126569A CN112284684A CN 112284684 A CN112284684 A CN 112284684A CN 202011126569 A CN202011126569 A CN 202011126569A CN 112284684 A CN112284684 A CN 112284684A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- light
- information processing
- processing board
- data acquisition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/60—Testing or inspecting aircraft components or systems
Abstract
The invention discloses an optical fiber sensor data acquisition device for monitoring the state of a machine body structure, which comprises: wide spectrum light source, loop device, optical switch, photoelectric conversion assembly, AD converter and information processing board. The light emission path of the broad spectrum light source is capable of emitting light covering a set wavelength. The input end of one side of the optical switch is connected with a plurality of sensing optical fiber branches of detection types and can be arranged according to a set time sequence; the other side can receive the transmitted light sent by the loop machine. The circulator can realize the separation of the transmitted light and the reflected light which are transmitted in the forward direction in the output light path to obtain the separated reflected light. The input end of the information processing board is connected with the AD converter and stores the digital values of the electric signals of the plurality of sensing optical fibers into a local memory. The invention provides the optical fiber sensor data acquisition device for monitoring the structural state of the machine body, which has light weight, convenient installation and simple structure. The invention provides an optical fiber sensor data acquisition system for monitoring the state of a body structure.
Description
Technical Field
The invention belongs to the technical field of aircraft detection, and particularly relates to an optical fiber sensor data acquisition device and system for monitoring the state of an airframe structure.
Background
Piezoelectric sensors are often used in existing aircraft detection. In the traditional piezoelectric sensor testing equipment and strain gauge monitoring equipment, a plurality of connecting cables are arranged between each sensor and the data acquisition and analysis equipment, the wiring is complex, the overall weight of the equipment is large, the load of an aircraft is increased, and the flight mileage is shortened; in addition, the conventional piezoelectric sensor testing equipment and the conventional strain gauge testing equipment need to be detected and calibrated before each test is started, so that the time consumption is long, and the actual operation of a pilot is inconvenient.
Disclosure of Invention
The invention provides an optical fiber sensor data acquisition device for monitoring the state of a machine body structure, which comprises: the device comprises a wide-spectrum light source, a loop device, an optical switch, a photoelectric conversion assembly, an AD converter and an information processing board;
the light emission path of the wide-spectrum light source is a light source capable of emitting light covering a set wavelength; the loop device is arranged on the light emitting passage and can transmit the transmitted light sent by the light emitting passage to the optical switch;
the input end of one side of the optical switch is connected with a plurality of sensing optical fiber branches of detection types and can be connected with a plurality of sensing optical fiber branches of different types at specified time intervals according to a set time sequence; the other side of the optical switch can receive the transmitted light sent by the loop device; the optical switch can reflect the transmitted light and incident light of the optical fiber sensor optical fiber passage to form reflected light and transmit the reflected light to the loop device; the sensing optical fiber branch is connected with various types of optical fiber sensors; the various types of optical fiber sensors are arranged outside the body structure;
the circulator can realize the separation of the transmitted light and the reflected light which are transmitted in the forward direction in an output light path to obtain separated reflected light;
the photoelectric conversion component comprises a grating and a CCD charge occasional device array and is arranged in the output light path; the photoelectric conversion component can project the spectrum of the reflected light after the loop separator is separated onto the CCD charge occasional device array; the CCD charge-on-occasion device array is capable of outputting a plurality of electrical signals that match the spectrum;
the AD converter is capable of converting an analog value of an electrical signal at each point in the CCD charge-time device array to a digital value of the electrical signal;
the input end of the information processing board is connected with the AD converter and stores the digital values of the electric signals of the plurality of sensing optical fibers into a local memory.
In one embodiment, the set wavelength is 1520nm-1570 nm.
In one embodiment, the electrical signal comprises a voltage signal.
In one embodiment, the information processing board includes a cache card; the information processing board is provided with a quick access recording card plug port capable of being plugged with the quick access recording card; when the quick access recording card is inserted into the quick access recording card inserting and extracting opening, the information processing board can store the electric signal digital values of the sensing optical fibers in the local memory into the quick access recording card.
In one embodiment, the input end and the output end of the information processing board are connected with an external detection device in a wired or wireless mode; the information processing board can acquire a status check and report command from the external detection device and can execute the status check and report command.
In one embodiment, the information processing board is provided with a detection interface; the detection interface can be connected with a detection data input device in a wired or wireless mode, so that the onboard program of the information processing board can be detected or upgraded.
In one embodiment, the information processing board is provided with an onboard equipment interface; the airborne equipment interface can be communicated with airborne equipment and can acquire set parameters of the body structure; the airborne equipment interface can output the working state and the self-checking result of the information processing board.
In one embodiment, the on-board device interface is a 1553B/422/429 bus interface.
The invention provides an optical fiber sensor data acquisition system for monitoring the state of a machine body structure, which comprises: the device comprises a wide-spectrum light source, a loop device, an optical switch, a photoelectric conversion assembly, an AD converter and an information processing board;
the light emission path of the wide-spectrum light source is a light source capable of emitting light covering a set wavelength; the loop device is arranged on the light emitting passage and can transmit the transmitted light sent by the light emitting passage to the optical switch;
the input end of one side of the optical switch is connected with a plurality of sensing optical fiber branches of detection types and can be connected with a plurality of sensing optical fiber branches of different types at specified time intervals according to a set time sequence; the other side of the optical switch can receive the transmitted light sent by the loop device; the optical switch can reflect the transmitted light and incident light of the optical fiber sensor optical fiber passage to form reflected light and transmit the reflected light to the loop device; the sensing optical fiber branch is connected with various types of optical fiber sensors; the various types of optical fiber sensors are arranged outside the body structure;
the circulator can realize the separation of the transmitted light and the reflected light which are transmitted in the forward direction in an output light path to obtain separated reflected light;
the photoelectric conversion component comprises a grating and a CCD charge occasional device array and is arranged in the output light path; the photoelectric conversion component can project the spectrum of the reflected light after the loop separator is separated onto the CCD charge occasional device array; the CCD charge-on-occasion device array is capable of outputting a plurality of electrical signals that match the spectrum;
the AD converter is capable of converting an analog value of an electrical signal at each point in the CCD charge-time device array to a digital value of the electrical signal;
the input end of the information processing board is connected with the AD converter and stores the digital values of the electric signals of the plurality of sensing optical fibers into a local memory.
In another embodiment, the information processing board includes a cache card; the information processing board is provided with a quick access recording card plug port capable of being plugged with the quick access recording card; when the quick access recording card is inserted into the quick access recording card inserting and extracting opening, the information processing board can store the electric signal digital values of the sensing optical fibers in the local memory into the quick access recording card.
The invention provides the optical fiber sensor data acquisition device for monitoring the structural state of the machine body, which has light weight, convenient installation and simple structure. The invention provides the optical fiber sensor data acquisition system for monitoring the structural state of the machine body, which has the advantages of good stability, convenience in installation and simple structure.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic diagram illustrating a fiber sensor data acquisition device for monitoring the state of a body structure.
Fig. 2 is a schematic diagram for explaining another composition of the optical fiber sensor data acquisition device for monitoring the state of the body structure.
FIG. 3 is a schematic view for explaining the external crosslinking relationship of the information processing sheet.
Fig. 4 is a schematic diagram for explaining the principle composition of the optical fiber sensor data acquisition device for monitoring the state of the body structure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An optical fiber sensor data acquisition device for monitoring the state of a body structure, as shown in fig. 1, comprises: a broad spectrum light source 10, a circulator 20, an optical switch 30, a photoelectric conversion component 40, an AD converter 50 and an information processing board 60.
The light emission path of the broad spectrum light source 10 is a light source capable of emitting light covering a set wavelength. The circulator 20 is disposed on the light emitting path and is capable of transmitting the transmitted light transmitted by the light emitting path to the optical switch 30.
The input end of one side of the optical switch 30 is connected to a plurality of sensing optical fiber branches of detection types and can be connected to a plurality of sensing optical fiber branches of different types at a specified time interval according to a set time sequence. The other side of the optical switch 30 is capable of receiving transmitted light from the circulator 20. The optical switch 30 is capable of reflecting the transmitted light with the incident light of the fiber sensor fiber path to form reflected light and transmitting the reflected light to the circulator 20. The sensing optical fiber branch is connected with various types of optical fiber sensors. The various types of optical fiber sensors are arranged outside the body structure.
The circulator 20 can realize the separation of the transmitted light and the reflected light which propagate in the forward direction in the output optical path to obtain the separated reflected light.
The photoelectric conversion assembly 40 comprises a grating and an array of CCD charge emitting devices and is disposed in the output optical path. The photoelectric conversion assembly 40 may project the spectrum of the reflected light separated by the circulator 20 onto an array of CCD charge-coupled devices. The CCD charge-on-occasion device array can output multiple electrical signals that match the spectrum.
The AD converter 50 is capable of converting the analog value of the electrical signal at each point in the CCD charge array into a digital value of the electrical signal.
The input end of the information processing board 60 is connected to the AD converter 50 and stores the digital values of the electrical signals of the plurality of sensing fibers into a local memory.
In one embodiment, the set wavelength is 1520nm-1570 nm.
In one embodiment, the electrical signal comprises a voltage signal.
In one embodiment, the information processing board 60 includes a cache card. The information processing board 60 is provided with a cache card insertion/extraction port into which the cache card can be inserted. When the cache card is inserted into the cache card insertion port, the information processing board 60 can store the digital values of the electrical signals of the plurality of sensing fibers in the local memory into the cache card.
In one embodiment, the input and output of the information processing board 60 are wired or wirelessly connected to an external test device. The information processing board 60 can acquire the status check and report command from the external detection device and can execute the status check and report command.
In one embodiment, the information processing board 60 is provided with a detection interface. The test interface can be wired or wirelessly connected to a test data input device to enable testing or upgrading of the onboard programming of the information processing board 60.
In one embodiment, the information processing board 60 provides an onboard device interface. The airborne equipment interface can communicate with airborne equipment and can acquire the setting parameters of the body structure. The onboard equipment interface can output the operating state and the self-inspection result of the information processing board 60.
In one embodiment, the on-board device interface is a 1553B/422/429 bus interface.
The invention provides an optical fiber sensor data acquisition system for monitoring the state of a machine body structure, which comprises: a broad spectrum light source 10, a circulator 20, an optical switch 30, a photoelectric conversion component 40, an AD converter 50 and an information processing board 60.
The light emission path of the broad spectrum light source 10 is a light source capable of emitting light covering a set wavelength. The circulator 20 is disposed on the light emitting path and is capable of transmitting the transmitted light transmitted by the light emitting path to the optical switch 30.
The input end of one side of the optical switch 30 is connected to a plurality of sensing optical fiber branches of detection types and can be connected to a plurality of sensing optical fiber branches of different types at a specified time interval according to a set time sequence. The other side of the optical switch 30 is capable of receiving transmitted light from the circulator 20. The optical switch 30 is capable of reflecting the transmitted light with the incident light of the fiber sensor fiber path to form reflected light and transmitting the reflected light to the circulator 20. The sensing optical fiber branch is connected with various types of optical fiber sensors. The various types of optical fiber sensors are arranged outside the body structure.
The circulator 20 can realize the separation of the transmitted light and the reflected light which propagate in the forward direction in the output optical path to obtain the separated reflected light.
The photoelectric conversion assembly 40 comprises a grating and an array of CCD charge emitting devices and is disposed in the output optical path. The photoelectric conversion assembly 40 may project the spectrum of the reflected light separated by the circulator 20 onto an array of CCD charge-coupled devices. The CCD charge-on-occasion device array can output multiple electrical signals that match the spectrum.
The AD converter 50 is capable of converting the analog value of the electrical signal at each point in the CCD charge array into a digital value of the electrical signal.
The input end of the information processing board 60 is connected to the AD converter 50 and stores the digital values of the electrical signals of the plurality of sensing fibers into a local memory.
In another embodiment, the information processing board 60 includes a cache card. The information processing board 60 is provided with a cache card insertion/extraction port into which the cache card can be inserted. When the cache card is inserted into the cache card insertion port, the information processing board 60 can store the digital values of the electrical signals of the plurality of sensing fibers in the local memory into the cache card.
The optical fiber sensor data acquisition device for monitoring the state of the body structure comprises the following systems as shown in figure 2:
(1) broad spectrum light source: the light source required by the system is generated, and the wavelength of the light source is 1520nm-1570 nm.
(2) A loop device: separation of the forward propagating transmitted light and the reflected light is achieved.
(3) An optical switch: according to the time sequence requirement, different sensing optical fiber branches are connected according to the appointed time interval, so that the measurement of a multi-path optical fiber grating sensor can be realized;
(4) a photoelectric conversion module: the CCD array is composed of a volume grating and a CCD array, the spectrum of reflected light can be reflected on the CCD array, and the output voltage form of the CCD reflects the spectrum condition;
(5) AD conversion: converting the electric signals of each point of the CCD into digital signals;
(6) an information processing board: the embedded processor is used for converting the spectral information reflected by each sensor into corresponding physical quantity, and the following work is completed:
a) transmitting the measured data to a cache recording card for storage, and using the cache recording card for downloading processing by ground equipment;
b) receiving a command of external detection equipment, and finishing corresponding state checking and reporting according to the command;
c) and the external equipment upgrades the firmware of the equipment through the detection interface.
(7) Caching the record card: the detected various physical quantities are stored, so that the plugging and unplugging are convenient, and the ground maintenance support personnel can conveniently obtain various physical parameters reflecting the structure state of the machine body;
(8) an airborne equipment interface: the device has the bus communication capacity of 1553B/422/429 and the like, is convenient to communicate with airborne equipment, is used for acquiring various flight parameters related to body structure analysis, and reports the working state and the self-checking result of the device.
The external cross-linked object of the body load data acquisition device comprises an airborne electronic device, an external detection device and a system power supply, and the cross-linked relation is shown in fig. 3.
The optical fiber sensor data acquisition device for monitoring the state of the body structure is shown in figure 4:
(1) after the system is started, the wide-spectrum light source emits a light source covering 1520nm-1570 nm;
(2) the optical circulator transmits the transmitted light sent forward to the optical switch;
(3) the optical switch is used for connecting different optical fiber sensor paths according to the time sequence requirement;
(4) the optical fiber sensor reversely transmits the light emitted by the grating to the optical switch;
(5) the optical switch transmits the reflected light to the circulator;
(6) the loop device separates the reflected light and sends the separated reflected light to the photoelectric conversion assembly;
(7) the photoelectric conversion component outputs the spectrum information of the reflected light as voltage signals of different point positions of the CCD array;
(8) the CCD voltage signal is acquired and converted by the AD converter and then is sent to the information processing board;
(9) the information processing board compares the reflected spectrum data with the initial spectrum data to obtain corresponding physical quantity;
(10) the information processing board stores the physical quantities into a quick access recording card according to the time sequence;
(11) the airborne electronic equipment sends time-setting information to the information processing board and unifies the clock data of the information processing board;
(12) the airborne electronic equipment transmits a self-checking command to the information processing board, and the information processing board checks the working condition of each component and reports the state of the equipment;
(13) in the ground inspection process, external detection equipment is connected with an information processing board through a detection interface to obtain the working state of the equipment and check whether the equipment has a fault or not;
(14) in the equipment upgrading process, the external detection equipment transmits the upgraded firmware to the information processing board, and the software version of the equipment can be upgraded after the upgraded firmware is burned.
(15) If the ground personnel need to analyze the measured data, the cabin door of the quick access recording card is opened, the quick access recording card is taken out, and the ground equipment is used for acquiring the data of the quick access recording card and analyzing the data.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A fiber sensor data acquisition device for organism structural condition monitoring includes: the device comprises a wide-spectrum light source, a loop device, an optical switch, a photoelectric conversion assembly, an AD converter and an information processing board;
the light emission path of the wide-spectrum light source is a light source capable of emitting light covering a set wavelength; the loop device is arranged on the light emitting passage and can transmit the transmitted light sent by the light emitting passage to the optical switch;
the input end of one side of the optical switch is connected with a plurality of sensing optical fiber branches of detection types and can be connected with a plurality of sensing optical fiber branches of different types at specified time intervals according to a set time sequence; the other side of the optical switch can receive the transmitted light sent by the loop device; the optical switch can reflect the transmitted light and incident light of the optical fiber sensor optical fiber passage to form reflected light and transmit the reflected light to the loop device; the sensing optical fiber branch is connected with various types of optical fiber sensors; the various types of optical fiber sensors are arranged outside the body structure;
the circulator can realize the separation of the transmitted light and the reflected light which are transmitted in the forward direction in an output light path to obtain separated reflected light;
the photoelectric conversion component comprises a grating and a CCD charge occasional device array and is arranged in the output light path; the photoelectric conversion component can project the spectrum of the reflected light after the loop separator is separated onto the CCD charge occasional device array; the CCD charge-on-occasion device array is capable of outputting a plurality of electrical signals that match the spectrum;
the AD converter is capable of converting an analog value of an electrical signal at each point in the CCD charge-time device array to a digital value of the electrical signal;
the input end of the information processing board is connected with the AD converter and stores the digital values of the electric signals of the plurality of sensing optical fibers into a local memory.
2. The fiber optic sensor data acquisition device of claim 1 wherein the set wavelength is 1520nm-1570 nm.
3. The fiber optic sensor data acquisition device of claim 1 or 2, wherein the electrical signal comprises a voltage signal.
4. The optical fiber sensor data acquisition device of claim 1, wherein the information processing board comprises a cache card; the information processing board is provided with a quick access recording card plug port capable of being plugged with the quick access recording card; when the quick access recording card is inserted into the quick access recording card inserting and extracting opening, the information processing board can store the electric signal digital values of the sensing optical fibers in the local memory into the quick access recording card.
5. The optical fiber sensor data acquisition device according to claim 4, wherein the input end and the output end of the information processing board are connected with an external detection device in a wired or wireless manner; the information processing board can acquire a status check and report command from the external detection device and can execute the status check and report command.
6. The optical fiber sensor data acquisition device according to claim 4 or 5, wherein the information processing board is provided with a detection interface; the detection interface can be connected with a detection data input device in a wired or wireless mode, so that the onboard program of the information processing board can be detected or upgraded.
7. The optical fiber sensor data acquisition device according to claim 6, wherein the information processing board is provided with an onboard equipment interface; the airborne equipment interface can be communicated with airborne equipment and can acquire set parameters of the body structure; the airborne equipment interface can output the working state and the self-checking result of the information processing board.
8. The fiber optic sensor data acquisition device of claim 7 wherein the on-board equipment interface is a 1553B/422/429 bus interface.
9. A fiber sensor data acquisition system for monitoring of airframe structure state includes: the device comprises a wide-spectrum light source, a loop device, an optical switch, a photoelectric conversion assembly, an AD converter and an information processing board;
the light emission path of the wide-spectrum light source is a light source capable of emitting light covering a set wavelength; the loop device is arranged on the light emitting passage and can transmit the transmitted light sent by the light emitting passage to the optical switch;
the input end of one side of the optical switch is connected with a plurality of sensing optical fiber branches of detection types and can be connected with a plurality of sensing optical fiber branches of different types at specified time intervals according to a set time sequence; the other side of the optical switch can receive the transmitted light sent by the loop device; the optical switch can reflect the transmitted light and incident light of the optical fiber sensor optical fiber passage to form reflected light and transmit the reflected light to the loop device; the sensing optical fiber branch is connected with various types of optical fiber sensors; the various types of optical fiber sensors are arranged outside the body structure;
the circulator can realize the separation of the transmitted light and the reflected light which are transmitted in the forward direction in an output light path to obtain separated reflected light;
the photoelectric conversion component comprises a grating and a CCD charge occasional device array and is arranged in the output light path; the photoelectric conversion component can project the spectrum of the reflected light after the loop separator is separated onto the CCD charge occasional device array; the CCD charge-on-occasion device array is capable of outputting a plurality of electrical signals that match the spectrum;
the AD converter is capable of converting an analog value of an electrical signal at each point in the CCD charge-time device array to a digital value of the electrical signal;
the input end of the information processing board is connected with the AD converter and stores the digital values of the electric signals of the plurality of sensing optical fibers into a local memory.
10. The fiber sensor data acquisition system of claim 9, wherein the information processing board comprises a cache card; the information processing board is provided with a quick access recording card plug port capable of being plugged with the quick access recording card; when the quick access recording card is inserted into the quick access recording card inserting and extracting opening, the information processing board can store the electric signal digital values of the sensing optical fibers in the local memory into the quick access recording card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011126569.4A CN112284684A (en) | 2020-10-20 | 2020-10-20 | Optical fiber sensor data acquisition device and system for monitoring machine body structure state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011126569.4A CN112284684A (en) | 2020-10-20 | 2020-10-20 | Optical fiber sensor data acquisition device and system for monitoring machine body structure state |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112284684A true CN112284684A (en) | 2021-01-29 |
Family
ID=74424334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011126569.4A Pending CN112284684A (en) | 2020-10-20 | 2020-10-20 | Optical fiber sensor data acquisition device and system for monitoring machine body structure state |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112284684A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207162A (en) * | 2013-03-19 | 2013-07-17 | 石家庄供电公司 | Online concentration monitoring system for gases in cable tunnel based on optical fiber sensing |
| CN103604446A (en) * | 2013-11-04 | 2014-02-26 | 清华大学 | Multi-channel fiber bragg grating absolute wavelength demodulation system based on single detector and method thereof |
| CN104343466A (en) * | 2014-10-15 | 2015-02-11 | 中国科学院合肥物质科学研究院 | All-fiber coal mine safety monitoring system |
| CN109357786A (en) * | 2018-12-03 | 2019-02-19 | 湖北工业大学 | A kind of system for detecting temperature and method based on sapphire fiber grating sensor |
| CN109444796A (en) * | 2018-12-11 | 2019-03-08 | 三河市博维创通企业管理咨询中心(有限合伙) | Fibre optic current sensor optical path states monitor system |
| CN110155366A (en) * | 2019-05-23 | 2019-08-23 | 兰州大学 | Perception certainly, identification and the reparation integral method of Intelligent optical fiber composite construction |
-
2020
- 2020-10-20 CN CN202011126569.4A patent/CN112284684A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207162A (en) * | 2013-03-19 | 2013-07-17 | 石家庄供电公司 | Online concentration monitoring system for gases in cable tunnel based on optical fiber sensing |
| CN103604446A (en) * | 2013-11-04 | 2014-02-26 | 清华大学 | Multi-channel fiber bragg grating absolute wavelength demodulation system based on single detector and method thereof |
| CN104343466A (en) * | 2014-10-15 | 2015-02-11 | 中国科学院合肥物质科学研究院 | All-fiber coal mine safety monitoring system |
| CN109357786A (en) * | 2018-12-03 | 2019-02-19 | 湖北工业大学 | A kind of system for detecting temperature and method based on sapphire fiber grating sensor |
| CN109444796A (en) * | 2018-12-11 | 2019-03-08 | 三河市博维创通企业管理咨询中心(有限合伙) | Fibre optic current sensor optical path states monitor system |
| CN110155366A (en) * | 2019-05-23 | 2019-08-23 | 兰州大学 | Perception certainly, identification and the reparation integral method of Intelligent optical fiber composite construction |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201885826U (en) | Electromechanical equipment optical fiber online monitoring system | |
| US8692984B2 (en) | Field tester for topologies utilizing array connectors and multi-wavelength field tester for topologies utilizing array connectors | |
| EP3499506B1 (en) | System with optical memory installed on an aircraft | |
| US7684699B2 (en) | Optical transceiver module for monitoring an optical fiber and method for making available measuring data from monitoring an optical fiber | |
| CN205608142U (en) | Inside partial discharge's of transformer test system | |
| CN112265657B (en) | Spacecraft ground environment test system based on optical fiber sensing | |
| US5210703A (en) | Apparatus and methods for testing optical communications networks | |
| RU2544028C1 (en) | Aircraft structure technical condition monitoring system (versions) | |
| CN112284684A (en) | Optical fiber sensor data acquisition device and system for monitoring machine body structure state | |
| CN103644991B (en) | Based on the method for measuring stress of the double optical fiber grating of Distributed Feedback Laser demodulation | |
| US11215528B2 (en) | Multiple front-end device based high speed optical time domain reflectometer acquisition | |
| CN211018038U (en) | Portable high-voltage cable multi-state intelligent inspection equipment | |
| US8844341B2 (en) | Data collector for an internal engine component | |
| CN209606320U (en) | All -fiber humidity sensing device | |
| CN111060865B (en) | Inspection system based on electric energy metering device | |
| CN102313559A (en) | Closed loop multi-functional fiber grating sensing device for built-in standard measurement source and method | |
| CN113517943A (en) | Distributed measurement system and method based on space division wavelength division multiplexing | |
| CN102169272A (en) | Method for demodulating wavelength of fiber grating by utilizing linear tilt filter | |
| CN208969180U (en) | Photoelectric cell test macro | |
| CN112034280A (en) | Portable platform door system multichannel detection switch testing arrangement | |
| CN211930637U (en) | Diagnostic device for GSM-R optical fiber repeater | |
| CN211205341U (en) | Fiber grating demodulation system | |
| US20230408573A1 (en) | System and method for testing optical receivers | |
| US20220090984A1 (en) | Multiple front-end device based high speed optical time domain reflectometer acquisition | |
| CN114112030A (en) | Photoelectric detector performance testing device based on artificial intelligence |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210129 |
|
| RJ01 | Rejection of invention patent application after publication |