Optical fiber micro-vibration mode recognition system and optical fiber micro-vibration mode recognition method on basis of digital signal processor (DSP) and field programmable gate array (FPGA)
A pattern recognition and micro-vibration technology, which is applied to measuring devices, instruments, and measuring ultrasonic/sonic/infrasonic waves, etc., can solve problems that cannot meet the requirements of online real-time monitoring, and achieve unattended, strong real-time performance and superior performance Effect
Inactive Publication Date: 2014-07-02
BEIHANG UNIV
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Type identification of optical fiber micro-vibration sensing signals offline on the PC side obviously cannot meet the requirements of online real-time monitoring
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[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0034] The present invention proposes a pattern recognition system of an optical fiber micro-vibration sensor based on DSP and FPGA, which includes a photoelectric conversion module 2 , an analog-to-digital conversion module 3 , an FPGA module 13 and a DSP module 14 . The FPGA module 13 includes a sampling control module 4, a signal detection module 5 and a FIFO module 6 (First-In-First-Out module). The DSP module 14 is a data exchange control module 7 , a cache module 8 , a feature extraction module 9 , a classifier model training module 10 and a classifier model testing module 11 .
[0035] Such as figure 1 As shown, the optical fiber micro-vibration sensor outputs the optical fiber micro-vibration sensor output signal 1 to the photoelectric conversion module 2, and the signal is converted from the light intensity signal to the analog voltage signal throug...
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The invention provides an optical fiber micro-vibration mode recognition system and an optical fiber micro-vibration mode recognition method on the basis of a digital signal processor (DSP) and a field programmable gate array (FPGA) and belongs to the technical field of optical fiber micro-vibration sensing. The optical fiber micro-vibration sensor mode recognition system on the basis of the DSP and the FPGA comprises a photovoltaic conversion module, an analog-digital conversion module, an FPGA module and a DSP module, the FPGA module comprises a sampling control module, a signal detection module and a first-in firs-out (FIFO) module, and the DSP module comprises a data exchange control module, a cache module, a characteristic extracting module, a classifier model training module and a classifier module testing module. The signal mode recognition system and the signal mode recognition method can achieve recognize types of output signals of a micro-vibration sensor, reduce false alarm rate of the optical fiber micro-vibration sensor, and achieve on-line real-time mode recognition of the signals of the optical fiber micro-vibration sensor.
Description
technical field [0001] The invention relates to a signal pattern recognition system of an optical fiber micro-vibration sensor and a recognition method thereof, belonging to the technical field of optical fiber micro-vibration sensing. Background technique [0002] With the continuous development of fiber optic technology, fiber optic micro-vibration sensors are increasingly used in systems such as perimeter security, oil and gas pipelines, and communication line monitoring. The optical fiber micro-vibration sensor is a distributed optical fiber sensing system using optical fiber as the sensing medium, in which the optical fiber is used as both the sensing medium and the optical transmission medium. It can conduct remote and real-time monitoring of emergencies within a certain range of accuracy within the length of the sensing optical fiber. With the research and application of various distributed optical fiber sensing systems, the realization of various disturbance locatio...
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IPC IPC(8): G01H9/00
Inventor 李彦梁正桃李立京林文台尚静王明李勤钟翔姜漫
Owner BEIHANG UNIV