Non-uniform pulse modulation-based littoral oil spill monitoring method
A sea surface oil spill and pulse modulation technology, which is applied in the fields of sea surface oil spill monitoring, signal detection and identification, can solve the problem of high false alarm rate in oil spill monitoring, and achieve the effect of reducing false alarm rate, improving accuracy and increasing amplitude.
Active Publication Date: 2018-01-26
XIDIAN UNIV
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[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art, and propose a sea surface oil spill monitoring method based on non-uniform pulse modulation, which is used to solve the problem of high false alarm rate of oil spill monitoring in the complex sea surface environment existing in the prior art. technical problem
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[0024] Below in conjunction with accompanying drawing and specific embodiment, the present invention is described in further detail:
[0025] refer to figure 1 1. A sea surface oil spill monitoring system based on light source modulation, including an excitation device and a detection device.
[0026] The excitation device includes an MCU control unit, FPGA, a digital-to-analog converter, an op-amp device, and a light source excitation module. The MCU control unit is used to provide the frequency control word to the phase accumulator inside the FPGA to set the frequency of the analog non-uniform pulse modulation signal; the FPGA module includes a phase accumulator and a waveform memory, and the phase accumulator is used to provide the required phase information to the waveform memory ; The waveform memory is used to store the correspondence table between the phase and the amplitude of the digital non-uniform pulse modulation signal: the amplitude of the digital non-uniform pu...
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Abstract
The invention provides a non-uniform pulse modulation-based littoral oil spill monitoring method. The method is used to solve the technical problem of high false alarm rate of oil spill monitoring ina complex littoral environment in the prior art. The method comprises the following steps: an MCU control module loads a simulated non-uniform pulse modulation signal to a light source excitation module; the light source excitation module emits modulation ultraviolet lights to a monitored marine area according to the simulated non-uniform pulse modulation signal; a photomultiplier tube acquires the fluorescence signals of the monitored marine area, converts the fluorescent signals into electrical signals and sends the electrical signals to an analog-to-digital converter; the analog-to-digitalconverter performs analog-to-digital conversion on the electrical signals and sends obtained digital signals to a data processing module; and the data processing module subtracts a result obtained through performing cross-correlation operation on a reference signal and the digital signals from a result obtained through performing cross-correlation operation on a signal obtained after inverting thereference signal and the digital signals, accumulates counters when the above obtained difference is greater than a monitoring threshold, and gives an alarm when the accumulated result of the counters is greater than the alarm threshold.
Description
technical field [0001] The invention belongs to the field of signal detection and identification, and in particular relates to a sea surface oil spill monitoring method based on non-uniform pulse modulation, which can be used in the sea surface oil spill monitoring field. Background technique [0002] With the rapid development of industrial construction, various countries are more and more dependent on oil. While oil production and transportation are increasing, oil spill accidents also occur frequently, which makes enterprises involved in oil production and transportation face difficulties. Enormous pressure. Oil spill accidents not only bring economic losses to enterprises, but also cause huge disasters to the environment and society. In order to avoid and mitigate the harm caused by oil spill accidents, real-time monitoring of mineral oil in water bodies is required, so as to detect and respond to oil spill accidents that may occur at any time at sea. Therefore people ...
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IPC IPC(8): G01N21/64
Inventor 李林张果刘靳孙乐姬红兵
Owner XIDIAN UNIV