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.