High-speed, multi-channel space-borne miniature fiber grating demodulation device and demodulation method
A fiber grating demodulation and multi-channel technology, which is applied in the direction of transmitting sensing components, measuring devices, instruments, etc. by using optical devices, can solve the problems of poor adaptability to space environment, unsatisfactory, miniaturization, high integration, high reliability, and adaptability to space The requirements of the environment cannot realize the structural physical strength of satellite spacecraft, thermal distributed detection and other issues, so as to ensure the calibration accuracy of the system and compensate for the effect of measurement
Active Publication Date: 2020-07-31
BEIJING SATELLITE INFORMATION ENG RES INST
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Problems solved by technology
[0003] At present, the fiber grating demodulation devices commonly used at home and abroad are characterized by multi-channel low-speed or single-channel high-speed, and some of them have been successfully used in industrial and military fields. The requirements of the space environment cannot realize the distributed detection of the physical strength and heat of spacecraft such as satellites, manned / cargo spacecraft, and deep space probes
However, the high-speed, multi-channel miniaturized fiber grating demodulation device has not been practically applied due to factors such as high integration of optical fiber loops, high resource overhead for high-precision fitting processors, and poor adaptability to space environments.
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[0038] Specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0039] As shown in Figure 1, there are three views of the external dimensions of the demodulation device, which are introduced as follows:
[0040] The demodulation device is composed of a circuit module and an overall structure (including an integrated optical fiber connection interface). The circuit module is composed of three high-integrated circuit modules (power supply module, optical module, and processing interface module), and the signal transmission and power supply are realized through connectors between each module. The overall structure is composed of three stackable circuit module structures and upper and lower cover plates. The overall size of the device is 242mm×242mm×92mm (L×B×H), and the total weight does not exceed 1.3kg.
[0041] like figure 2 It is the design block diagram of each circuit module inside the demodul...
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The invention discloses a high-speed multichannel spaceborne minisize fiber grating demodulation apparatus and demodulation method, employing high integrated level design. The high-speed multichannelspaceborne minisize fiber grating demodulation apparatus is formed by a circuit module and an integral structure, and is provided with 8 measurement channels, wherein each measurement point of each measurement channel is configured with the demodulation rate from 10Hz to 1KHz, and the demodulation precision is better than 1pm and the repeatability is 1pm. The high-speed multichannel spaceborne minisize fiber grating demodulation apparatus can realize different structural force and thermal distributed monitoring, such as satellites, manned / freight spacecrafts, spacecrafts and immigrant cabins,can provide structural health monitoring and structural damage evaluation for the spacecrafts, can provide measurement data support for maintenance on-orbit for the spacecrafts, and has wide promotionprospects and application values.
Description
technical field [0001] The invention belongs to the field of optical fiber sensing, and relates to a high-speed, multi-channel satellite-borne miniature optical fiber grating demodulation device and a demodulation method. Background technique [0002] Nowadays, with the development of on-orbit maintainability technology of spacecraft, spacecraft are required to realize on-orbit autonomous structural health monitoring and evaluation, and provide data support for spacecraft on-orbit maintenance. Optical fiber sensing technology is widely used in civilian fields due to its passive, light weight, support for multi-parameter integration, and easy realization of high-density distributed monitoring. Therefore, the development of a fiber grating demodulation device suitable for aerospace applications has become a key factor in the application of this technology to spacecraft structural health monitoring, evaluation and on-orbit maintenance. [0003] At present, the fiber grating de...
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IPC IPC(8): G01D5/26
CPCG01D5/268
Inventor 侯旭涛李青松尹钊吕锡银李颀峰程静闫旭滕阳吴佳鹏
Owner BEIJING SATELLITE INFORMATION ENG RES INST