Phase demodulating method and device for identification of petroleum hydrocarbon pollutants

Abstract

The invention relates to a phase demodulating method and a device for identification of petroleum hydrocarbon pollutants. A controller outputs a control signal to a light source module in the device.A light source output by the light source module is irradiated into a sample cell in an acquisition module. A signal acquisition module collects lights stimulated by a measured sample and transmits the lights to a data conversion module which is in bi-directional connection with the controller. The phase demodulating method for the identification of the petroleum hydrocarbon pollutants includes: based on the principle of the fluorescence lifetime detection, time response characteristics of different petroleum hydrocarbon pollutants are established; according to the time response characteristics of the different petroleum hydrocarbon pollutants, oil products are identified by a double-channel light source and a double-channel detection. The phase demodulating method and device for the identification of the petroleum hydrocarbon pollutants has the advantages that through adopting an optical measurement method to identify the petroleum hydrocarbon pollutants, the identification speed is fast and no other pollution is produced; through adopting the double-channel light source structure, stable and sufficient light sources are produced, which is the premise of stable operation and accurate measurement of the device. The signal transmission between the channels is isolated and independent, thereby having extremely high measurement accuracy.

Description

technical field [0001] The invention relates to a petroleum hydrocarbon pollutant identification technology, in particular to a phase demodulation type petroleum hydrocarbon pollutant identification method and device. Background technique [0002] Since the beginning of the 21st century, with the rapid development of the national economy, the water quality of our country's rivers, lakes and marine environment 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. Therefore, the effective monitoring and management of petroleum hydrocarbon pollutants in various waters (rivers, lakes, offshore oceans), especially the development of real-time dynamic monitoring technology, has great social significance and economic value. [0003] Among the existing petroleum hydrocarbon pollutant detection technologies, the chemical met...

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Problems solved by technology

[0004] Aiming at the disadvantages of using chemical methods to measure petroleum hydrocarbon pollutants in the prior art, such as long measurement time, easy to produce secondary pollution, and poor anti-interference ability, the problem to be solved by the present invention is to provide a method that is less affected by external interference and does not require chemical reagents. , accurate and rapid phase demodulation method and device for identification of petroleum hydrocarbon pollutants

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