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Petroleum-type pollutant detection system and detection method

A detection system and technology for pollutants, applied in material excitation analysis, fluorescence/phosphorescence, etc., can solve the problems of low detection signal-to-noise and low fluorescence excitation efficiency, achieve high detection signal-to-noise ratio, not easy to external interference, and avoid cumbersome Effect

Active Publication Date: 2014-08-13
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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Problems solved by technology

However, at present, the excitation light source is mostly realized by white light spectroscopy, and the fluorescence excitation efficiency is not high; and the detection method often adopts a direct detection scheme, and the detection signal-to-noise ratio is low

Method used

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  • Petroleum-type pollutant detection system and detection method
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  • Petroleum-type pollutant detection system and detection method

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Embodiment Construction

[0038] The present invention will be described in detail below in conjunction with the examples.

[0039] Such as Figure 1-2 As shown, the petroleum pollutant detection system includes a transmitting unit, a receiving unit, a reference unit, and a signal processing unit. The transmitting unit includes a laser 1, a chopper 2, and a beam splitter 3 placed coaxially in sequence, wherein the laser 1 adopts A laser diode is used as an excitation light source, and the center wavelength of the laser emitted by the laser diode is 405nm, and other laser light sources with a center wavelength, such as a laser light source with a center wavelength of 355nm, can also be selected. The emitted laser light is modulated by the chopper 2 into a 1kHz "AC" signal, and then split by the beam splitter 3 into transmitted light and reflected light with half of the energy. The transmitted light enters the reference unit, and the signal output terminal of the reference unit passes through The ISA ac...

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Abstract

The invention discloses a detection system and a detection method of petroleum-type pollutants. The detection system comprises an emitting unit, a receiving unit, a reference unit and a signal processing unit. The emitting unit is used for emitting laser signals, and transmitted light signals and reflected light signals are outputted; an input terminal of the reference unit receives the transmitted light signals emitted from the emitting unit. An output terminal of the reference unit is connected to an input terminal of the signal processing unit. Reference signals outputted by the reference unit are transmitted to the signal receiving unit by the output terminal of the reference unit. A sample in a sample tank is excited by the reflected light signals, such that fluorescence signals are generated. The fluorescence signals are received by the receiving unit beside the sample tank, and are outputted to the signal processing unit by the receiving unit. The fluorescence signals are processed by the signal processing unit. The system and the method provided by the invention are based on laser-induced fluorescence detection principles. Emitted signals are modulated by using a modulation technology, such that the detection sensitivity of the system is high. With the method and the system, rapid, real-time, on-line and non-contact measuring upon water body petroleum-type pollutant fluorescence signals can be realized. The system and the method can be widely applied in water body environment monitoring.

Description

Technical field: [0001] The invention relates to water body environment monitoring, in particular to a detection system and detection method for water body petroleum pollutants. technical background: [0002] Since the beginning of the 21st century, with the rapid development of the national economy, the water quality of rivers, lakes and marine environments in my country has also suffered serious damage, damaging biological resources, endangering human health, and hindering fishing and human activities. This situation is particularly serious in economically developed coastal areas. Obviously, the effective monitoring and management of petroleum pollutants (hereinafter referred to as mineral oil) in sewage in various waters (rivers, rivers, lakes, and offshore oceans), especially the development of real-time dynamic monitoring technology, has great social significance and economic value. [0003] At present, the commonly used methods for measuring petroleum pollutants in wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
Inventor 冯巍巍陈令新刘铭平陈兆鹏
Owner YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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