CN104502321A - Oil overflowing monitoring system based on laser excitation fluorescent technology and working method of oil overflowing monitoring system - Google Patents
Oil overflowing monitoring system based on laser excitation fluorescent technology and working method of oil overflowing monitoring system Download PDFInfo
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- CN104502321A CN104502321A CN201510009517.1A CN201510009517A CN104502321A CN 104502321 A CN104502321 A CN 104502321A CN 201510009517 A CN201510009517 A CN 201510009517A CN 104502321 A CN104502321 A CN 104502321A
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Abstract
The invention discloses an oil overflowing monitoring system based on a laser excitation fluorescent technology and a working method of the oil overflowing monitoring system. The system comprises a laser emission device, a laser fluorescent receiving and conversion device, a signal acquisition device, a transconductance type peak value keeping circuit and a control device, wherein the laser fluorescent receiving and conversion device is used for receiving a fluorescent signal emitted by exciting oil, and converting the fluorescent signal into an electric signal; the transconductance type peak value keeping circuit is used for recording the peak value of an obtained pulse electric signal, keeping the peak value of the obtained pulse electric signal for a period of time, and transmitting the peak value to the control device; and the control device is used for comparing the pulse electric signal with data in a fluorescence spectrum database so as to reflect the variety of overflowed oil. According to the oil overflowing monitoring system, the transconductance type peak value keeping circuit is adopted so that a transmission band of the whole circuit is relatively high and the stability is good; the effective fluorescent signal can be obtained; whether the oil overflows or not is determined, and the accuracy of the peak value of the obtained pulse electric signal is guaranteed; and effective information is provided for the treatment of oil of different types in an oil overflowing accident.
Description
Technical field
The invention belongs to ocean environment monitoring technical field, particularly a kind of oil spill monitoring system based on LASER Excited Fluorescence technology and method of work thereof.
Background technology
Laser-induced fluorescence (LIF) is a kind of visual, non-contacting laser measurement method.In oil spilling detects, oily substance is due to the character of its fluorophor, and under the irradiation of ultraviolet light, oily substance sponges luminous energy and excites internal electron, thus inspires fluorescence phenomenon, and because the fluorescent characteristic of its uniqueness as differentiation foundation, can successfully can be detected.Wherein fluorescence signal efficient, accurately Acquire and process be important step in oil spilling detection technique.
Detector at present for fluorescence signal acquisition mainly contains: charge coupled cell (CCD) detector, photodiode array, photomultiplier etc.By Performance comparision, photomultiplier is the collection that performance is suitable for fluorescence signal in oil spilling detection most.The fluorescence signal inspired, as fluorescent probe, can be converted into electric signal and export by photomultiplier, and export electric signal and carry out subsequent treatment for being similar to pulse signal and being transferred to single-chip microcomputer, the peak value of pulse signal reflects the relevant information of oil spilling.And in information acquisition process, the fluorescence inspired can be subject to the impact of the factors such as light source, equipment, environment, the time to peak of signal is caused to shake.So the difficult point of the collecting part of whole information be exactly how when fluorescence spectrum reaches peak value accurate acquisition to the size of peak value.In order to provide spilled oil monitoring information accurately, the peak value of fluorescence signal being carried out rationally, gathers accurately and just seem very important.
Summary of the invention
For solving the problems referred to above that prior art exists, the present invention seeks to provide a kind of oil spill monitoring system based on LASER Excited Fluorescence technology and method of work thereof, eliminate the factor that the time to peak of fluorescence excitation is impacted as far as possible, ensure validity and the accuracy of signal, for spilled oil monitoring provides accurate foundation.
In order to achieve the above object, technical scheme of the present invention is as follows:
A kind of oil spill monitoring system based on LASER Excited Fluorescence technology, comprise laser beam emitting device, laser fluorescence receiving converter, signal pickup assembly, transconductance type peak holding circuit and control device, described laser beam emitting device comprises laser instrument, Laser Power Devices and cooling device, described laser fluorescence receiving converter comprises light filter and photomultiplier, described control device is provided with Data Analysis Services system, described laser fluorescence receiving converter is connected with signal pickup assembly, described signal pickup assembly is connected with transconductance type peak holding circuit, described transconductance type peak holding circuit is connected with control device, described control device is connected with laser beam emitting device, described control device comprises computing machine and server,
The laser of the specific wavelength that described laser beam emitting device is concentrated to the place emitted energy that oil spill accident occurs, the laser of described specific wavelength comprises infrared light or ultraviolet light;
Described laser fluorescence receiving converter receives the fluorescence signal of oils stimulated emission, and fluorescence signal is converted into electric signal;
The electric signal of gained is carried out filtering and pre-service by described signal pickup assembly, obtains the pulse electrical signal of elimination clutter;
Described transconductance type peak holding circuit is by the peak records of obtained pulse electrical signal and keep a period of time, and passes to control device;
Described control device, carries out analyzing and processing by Data Analysis Services system to the pulse electrical signal of gained, the data in the size of pulse electrical signal and fluorescence data storehouse is contrasted, thus reflects the kind of oil spilling.
Based on a method of work for the oil spill monitoring system of LASER Excited Fluorescence technology, comprise the steps:
A, in advance foundation are different, and the fluorescence data storehouse excited planted by oil
The chemical composition of oils is similar, but the molecular structure of different oils has very large difference, and the fluorescence spectrum peak value produced also has very big difference, and the voltage peak size obtained is also different.Obtain different oil by previous experiments and plant corresponding crest voltage, in control device, set up different oil plant the fluorescence data storehouse excited.
B, carry out peak value maintenance
Laser beam emitting device launches Ultra-Violet Laser to oil spilling place, by the interaction of laser and oily substance, inspires fluorescence phenomenon.The fluorescence signal inspired is transferred to signal pickup assembly through laser fluorescence receiving converter, signal pickup assembly converts fluorescence signal to pulse electrical signal and is transferred to transconductance type peak holding circuit, the peak value size of pulse electrical signal keeps by transconductance type peak holding circuit, thus ensures time enough and carry out analyzing and processing for control device paired pulses electric signal.
C, amplifying signal send control device to
The pressure reduction of trsanscondutance amplifier in transconductance type peak holding circuit to input voltage and output voltage amplifies, and output current signal, the electric current exported is by diode pair capacitor charging, because the electric discharge of electric capacity has retardance, thus reach the maintenance of fluorescence signal peak value, and pulse electrical signal peak value is passed to control device accurately;
The oils kind of D, resolution oil spilling
The crest voltage recorded by transconductance type peak holding circuit is mated with the data in database by the Data Analysis Services system in control device, tells the oils kind of oil spilling exactly.
Compared with prior art, the invention has the beneficial effects as follows:
1, the output impedance of the trsanscondutance amplifier of the present invention's transconductance peak holding circuit use is very big, makes the passband of whole circuit higher, and good stability, be suitable for processing fast signal, can ensure to obtain effective fluorescence signal, determine whether oil spilling occurs.In addition, the overcharged voltage that in transconductance type peak holding circuit, backfeed loop causes is very little, ensures the accuracy of the peak value size of the pulse electrical signal obtained.
2, the present invention sets up the fluorescence data storehouse that different oils excites, and realizes the accurate discriminating to oils kind by the voltage peak of gained, for the process of planting for different oil in oil spill accident provides effective information.
Accompanying drawing explanation
The present invention has 2, accompanying drawing, wherein:
Fig. 1 is the composition frame chart of laser fluorescence oil spill monitoring system.
Fig. 2 is the transconductance type peak holding circuit schematic diagram that integrated chip OPA615 forms.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.As shown in Figure 1, the present invention includes to oil spilling place Emission Lasers laser beam emitting device, for receive oils be stimulated produced fluorescence signal and be converted into electric signal laser fluorescence receiving converter, fluorescence signal carried out filtering and carry out recording and keep with the signal pickup assembly of process, the peak value of paired pulses electric signal transconductance type peak holding circuit, be used for analyzing and processing and contrast the control device of functions such as showing.
As shown in Figure 2, transconductance type peak holding circuit of the present invention adopts integrated chip OPA615 design, wherein the inner operation transconductance amplifier (OTA) by a bandwidth to be the sampling comparer of 730MHz and bandwidth be 710MHz of OPA615 forms, the command response time is kept to be 2.5ns, the transmission delay 1.9ns of chip, time performance is very excellent.In circuit, Signal in is pulse signal input terminal, the Emitter pin of signal input OPA615, after pulse signal enters, BASE pin charges to electric capacity C31 through resistance R15 (charging current limiter resistance), thus crest voltage is kept, Vout9_2d holds output voltage peak signal.OPA615 inside carries voltage follower, and output peak voltage signal is fed back to signal input part through R13 provides reference.
Claims (2)
1. the oil spill monitoring system based on LASER Excited Fluorescence technology, it is characterized in that: comprise laser beam emitting device, laser fluorescence receiving converter, signal pickup assembly, transconductance type peak holding circuit and control device, described laser beam emitting device comprises laser instrument, Laser Power Devices and cooling device, described laser fluorescence receiving converter comprises light filter and photomultiplier, described control device is provided with Data Analysis Services system, described laser fluorescence receiving converter is connected with signal pickup assembly, described signal pickup assembly is connected with transconductance type peak holding circuit, described transconductance type peak holding circuit is connected with control device, described control device is connected with laser beam emitting device, described control device comprises computing machine and server,
The laser of the specific wavelength that described laser beam emitting device is concentrated to the place emitted energy that oil spill accident occurs, the laser of described specific wavelength comprises infrared light or ultraviolet light;
Described laser fluorescence receiving converter receives the fluorescence signal of oils stimulated emission, and fluorescence signal is converted into electric signal;
The electric signal of gained is carried out filtering and pre-service by described signal pickup assembly, obtains the pulse electrical signal of elimination clutter;
Described transconductance type peak holding circuit is by the peak records of obtained pulse electrical signal and keep a period of time, and passes to control device;
Described control device, carries out analyzing and processing by Data Analysis Services system to the pulse electrical signal of gained, the data in the size of pulse electrical signal and fluorescence data storehouse is contrasted, thus reflects the kind of oil spilling.
2. based on a method of work for the oil spill monitoring system of LASER Excited Fluorescence technology, it is characterized in that: comprise the steps:
A, in advance foundation are different, and the fluorescence data storehouse excited planted by oil
The chemical composition of oils is similar, but the molecular structure of different oils has very large difference, and the fluorescence spectrum peak value produced also has very big difference, and the voltage peak size obtained is also different; Obtain different oil by previous experiments and plant corresponding crest voltage, in control device, set up different oil plant the fluorescence data storehouse excited;
B, carry out peak value maintenance
Laser beam emitting device launches Ultra-Violet Laser to oil spilling place, by the interaction of laser and oily substance, inspires fluorescence phenomenon; The fluorescence signal inspired is transferred to signal pickup assembly through laser fluorescence receiving converter, signal pickup assembly converts fluorescence signal to pulse electrical signal and is transferred to transconductance type peak holding circuit, the peak value size of pulse electrical signal keeps by transconductance type peak holding circuit, thus ensures time enough and carry out analyzing and processing for control device paired pulses electric signal;
C, amplifying signal send control device to
The pressure reduction of trsanscondutance amplifier in transconductance type peak holding circuit to input voltage and output voltage amplifies, and output current signal, the electric current exported is by diode pair capacitor charging, because the electric discharge of electric capacity has retardance, thus reach the maintenance of fluorescence signal peak value, and pulse electrical signal peak value is passed to control device accurately;
The oils kind of D, resolution oil spilling
The crest voltage recorded by transconductance type peak holding circuit is mated with the data in database by the Data Analysis Services system in control device, tells the oils kind of oil spilling exactly.
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| CN201510009517.1A CN104502321A (en) | 2015-01-06 | 2015-01-06 | Oil overflowing monitoring system based on laser excitation fluorescent technology and working method of oil overflowing monitoring system |
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| CN201510009517.1A CN104502321A (en) | 2015-01-06 | 2015-01-06 | Oil overflowing monitoring system based on laser excitation fluorescent technology and working method of oil overflowing monitoring system |
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| CN105527291A (en) * | 2016-01-15 | 2016-04-27 | 国家海洋局北海环境监测中心 | Vertical simulation device and simulation method of submarine spilled oil |
| CN106093955A (en) * | 2016-07-12 | 2016-11-09 | 李颖 | A kind of stay under water oil apparatus and method based on microwave modulation laser acquisition |
| CN106769882A (en) * | 2016-11-01 | 2017-05-31 | 深圳先进技术研究院 | Spilled oil monitoring instrument and its monitoring method |
| CN106970050A (en) * | 2017-03-10 | 2017-07-21 | 北京环境特性研究所 | UAV system multiband photoelectricity oil spilling intelligent checking system |
| CN107787450A (en) * | 2015-06-10 | 2018-03-09 | 沙特阿拉伯石油公司 | Use induced with laser Ultraluminescence spectral characterization crude oil |
| CN108051413A (en) * | 2017-11-30 | 2018-05-18 | 百色学院 | A kind of light activated photoluminescence spectra measuring system of pulse |
| CN105651777B (en) * | 2016-01-15 | 2018-08-14 | 国家海洋局北海环境监测中心 | A kind of vertical simulator |
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| CN106093955A (en) * | 2016-07-12 | 2016-11-09 | 李颖 | A kind of stay under water oil apparatus and method based on microwave modulation laser acquisition |
| CN106769882A (en) * | 2016-11-01 | 2017-05-31 | 深圳先进技术研究院 | Spilled oil monitoring instrument and its monitoring method |
| CN106970050A (en) * | 2017-03-10 | 2017-07-21 | 北京环境特性研究所 | UAV system multiband photoelectricity oil spilling intelligent checking system |
| CN108051413A (en) * | 2017-11-30 | 2018-05-18 | 百色学院 | A kind of light activated photoluminescence spectra measuring system of pulse |
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