CN106645063A - Remote marine oil spill real-time monitor - Google Patents

Abstract

The invention provides a real-time monitor for long-distance marine oil spills, which includes an excitation light device for emitting high-frequency stable ultraviolet light to monitor the oil spill state of the sea level in real time through a UV-LED light source. The stable ultraviolet light and the oil spill surface at sea level produce high-frequency fluorescence; the fluorescence receiving device is used to receive the high-frequency fluorescence generated by the oil spill surface and the high-frequency stable ultraviolet light emitted by the excitation light device, and perform subsequent processing through the photomultiplier tube . The beneficial effect of the present invention is that the photomultiplier tube is used as the detector of the weak fluorescent signal, which greatly improves the detection sensitivity, and can detect the oil spilled water surface of the long-distance target. ‑LED ultraviolet spectral bandwidth is about 15nm, so no light source filter is required, and the LED light-emitting frequency is high, which can realize real-time detection of various oils, basically no misjudgment, especially suitable for offshore oil drilling platforms for oil spill detection demand.

Description

A Real-time Monitor of Long-distance Marine Oil Spill

technical field

The invention relates to the technical field of photoelectric sensors, in particular to a long-distance marine oil spill real-time monitor.

Background technique

The existing marine oil spill monitoring devices that detect oil fluorescence (excited by ultraviolet light) basically use photodiodes as detectors, which have extremely low sensitivity, and the oil fluorescence signal is relatively weak. When the detection device is far away from the target oil spill surface, for example When used on offshore oil drilling platforms, oil spills cannot be detected. There are devices that use photomultiplier tubes as detectors and xenon lamps as excitation light sources. The luminous frequency is low, which is not suitable for real-time monitoring. The misjudgment of the oil spill occurred.

Contents of the invention

In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a real-time monitor for long-distance marine oil spills, which has a small misjudgment rate and high sensitivity for real-time monitoring of long-distance marine oil spills.

Technical scheme of the present invention is:

A long-distance marine oil spill real-time monitor is installed on the support of the offshore oil drilling platform, including an excitation light device and a fluorescence receiving device installed side by side on the monitor fixed frame,

The excitation light device is used to transmit high-frequency stable ultraviolet light to the sea level through a UV-LED light source to monitor the oil spill state at the sea level in real time, and the high-frequency stable ultraviolet light generates high-frequency fluorescence with the oil spill surface at the sea level ;

The fluorescence receiving device is used to receive the high-frequency fluorescence generated by the oil spill surface and the high-frequency stable ultraviolet light emitted by the exciting light device, and perform subsequent processing through the photomultiplier tube.

Further, the excitation light device includes: a UV-LED light source, a light source lens, a light source shade, a high-frequency LED constant current source driver board, and a light source radiator;

The high-frequency LED constant current source driver board is connected to the UV-LED light source for driving the UV-LED light source to emit high-frequency stable ultraviolet light;

The light source hood is in the shape of a cylinder and is socketed on the periphery of the UV-LED light source to prevent the high-frequency stable ultraviolet light emitted by the UV-LED light source from directly entering the fluorescence receiving device;

The light source lens is arranged at the other end of the light source shade, and is used for converging the high-frequency stable ultraviolet light emitted by the UV-LED light source onto the sea surface target.

Further, the UV-LED light source is a narrow-band UV-LED light source with a wavelength of 365nm LED and a spectral bandwidth of 15nm; the light source lens is a quartz glass lens.

Further, it also includes a light source radiator, which dissipates heat from the UV-LED light source.

Further, the heat sink of the light source is a Peltier cooling sheet.

Further, the fluorescence receiving device includes a photomultiplier tube, a fluorescence lens, a fluorescence filter, and a fluorescence light shield,

The fluorescent lens is arranged at one end of the fluorescent light shield, the other end of the fluorescent light shield is sleeved on the photomultiplier tube, and the fluorescent filter is arranged on the photomultiplier tube for receiving The high-frequency fluorescence is converged by the fluorescence lens, passes through the fluorescence filter to the photomultiplier tube, and is converted into a high-frequency analog voltage signal.

Further, the fluorescent filter is a filter with a passband range of 400nm-600nm, the fluorescent lens is a K9 glass lens, and the photomultiplier tube is PMT from ET Company.

Further, a signal processing board is also included, the signal processing board is connected with the photomultiplier tube, and is used to convert the high-frequency analog voltage signal output by the photomultiplier tube into a DC voltage signal, and convert the DC voltage signal through an analog-to-digital converter into a digital signal that can be recognized by a digital signal processor.

Further, the signal processing board includes an operational amplifier ADA4891, an analog-to-digital converter AD8329 and a digital signal processor ADSP21990,

The ADA4891 receives the high-frequency analog voltage signal output by the photomultiplier tube, and uses a demodulation circuit composed of the ADA4891 to convert the high-frequency analog voltage signal into a DC voltage signal and then input it to the analog-to-digital converter AD8329, which is converted by the analog-to-digital converter AD8329 After the digital signal is input to the digital signal processor ADSP21990 for digital signal and oil spill algorithm processing.

Further, it also includes a main control board and a power manager, the main control board is respectively connected with the signal processing board and the power manager through the UART interface, and is used for supplying power to the monitor and coordinating the operation of the signal processing board.

Compared with the prior art, the beneficial effect of the present invention is that the photomultiplier tube is used as the detector of the weak fluorescent signal, which greatly improves the detection sensitivity and can detect the oil spilled water surface of the long-distance target. As an excitation light source, the narrow-band UV-LED ultraviolet spectral bandwidth is about 15nm, so no light source filter is required, and the LED light-emitting frequency is high, which can realize real-time detection of various oils, basically without misjudgment, especially suitable for offshore oil Drilling platform's demand for oil spill detection.

Description of drawings

Figure 1 is a block diagram of a long-distance marine oil spill real-time monitor.

In the figure: UV-LED light source 1, photomultiplier tube 2, light source lens 3, fluorescent lens 4, light source hood 5, fluorescent hood 6, light source radiator 7, fluorescent filter 8, high-frequency LED constant current source drive Board 9, signal processing board 10, main control board 11, power manager 12.

Fig. 2 is a schematic diagram of a monitoring process of a long-distance marine oil spill real-time monitor 2-1.

In the figure: offshore oil drilling platform support 2-2, excitation light device 2-3, fluorescence receiving device 2-4, high-frequency stable ultraviolet light 2-5, high-frequency fluorescence 2-6, sea level 2-8.

detailed description

The technical solution of the present invention is specifically described below in conjunction with the accompanying drawings. It should be pointed out that the technical solution of the present invention is not limited to the implementation described in the examples. Those skilled in the art refer to and learn from the content of the technical solution of the present invention. Improvements and designs made on the basis of the invention shall belong to the protection scope of the present invention.

As shown in Figure 1,

The embodiment of the present invention provides a long-distance marine oil spill real-time monitor, installed on the support of the offshore oil drilling platform, including an excitation light device and a fluorescence receiving device installed side by side on the monitor fixed frame,

The excitation light device is used to transmit high-frequency stable ultraviolet light to the sea level through a UV-LED light source to monitor the oil spill state at the sea level in real time, and the high-frequency stable ultraviolet light generates high-frequency fluorescence with the oil spill surface at the sea level ;

The fluorescence receiving device is used to receive the high-frequency fluorescence generated by the oil spill surface and the high-frequency stable ultraviolet light emitted by the exciting light device, and perform subsequent processing through the photomultiplier tube.

Further, the excitation light device includes: a UV-LED light source 1, a light source lens 3, a light source shade 5, a high-frequency LED constant current source drive board 9, and a light source radiator 7;

The high-frequency LED constant current source driver board 9 is connected to the UV-LED light source 1 for driving the UV-LED light source 1 to emit high-frequency stable ultraviolet light;

The light source shading cover 5 is cylindrical, and is sleeved on the periphery of the UV-LED light source 1 to prevent the high-frequency stable ultraviolet light emitted by the UV-LED light source 1 from directly entering the fluorescent receiving device;

The light source lens 3 is arranged at the other end of the light source shade 5, and is used for converging the high-frequency stable ultraviolet light emitted by the UV-LED light source 1 onto the sea surface target.

Further, the UV-LED light source 1 is a narrow-band UV-LED light source with a wavelength of 365nm LED and a spectral bandwidth of 15nm; the light source lens 3 is a quartz glass lens.

Further, it also includes a light source radiator, which dissipates heat from the UV-LED light source.

Preferably, the light source radiator is a Peltier cooling sheet. When the high-power UV-LED light source 1 is turned on, a large amount of heat will be generated. In order to prevent damage to the UV-LED light source 1, a Peltier cooling sheet is configured as a heat sink for the light source to dissipate heat.

Further, the fluorescence receiving device includes a photomultiplier tube 2, a fluorescence lens 4, a fluorescence filter 8, and a fluorescence light shield 6,

The fluorescent lens 4 is arranged on one end of the fluorescent light shield 6, the other end of the fluorescent light shield 6 is sleeved on the photomultiplier tube 2, and the fluorescent filter 8 is arranged on the photomultiplier tube 2 , used to converge the received high-frequency fluorescence through the fluorescence lens 4, pass through the fluorescence filter 8 to the photomultiplier tube 2, and convert it into a high-frequency analog voltage signal. The fluorescent shade 6 is used for shielding the stray light outside the effective high-frequency fluorescent light.

Further, the fluorescent filter 8 is a filter with a passband range of 400nm-600nm, the fluorescent lens 4 is a K9 glass lens, and the photomultiplier tube 2 is a PMT from ET Company.

Further, a signal processing board 10 is also included, the signal processing board 10 is connected with the photomultiplier tube 2, and is used to convert the high-frequency analog voltage signal output by the photomultiplier tube 2 into a DC voltage signal, and convert the The DC voltage signal is converted into a digital signal that can be recognized by a digital signal processor.

Further, the signal processing board 10 includes an operational amplifier ADA4891, an analog-to-digital converter AD8329 and a digital signal processor ADSP21990,

The ADA4891 receives the high-frequency analog voltage signal output by the photomultiplier tube, and uses a demodulation circuit composed of the ADA4891 to convert the high-frequency analog voltage signal into a DC voltage signal and then input it to the analog-to-digital converter AD8329, which is converted by the analog-to-digital converter AD8329 After the digital signal is input to the digital signal processor ADSP21990 for digital signal and oil spill algorithm processing.

Further, a main control board 11 and a power manager 12 are also included, and the main control board 11 is respectively connected with the signal processing board 10 and the power manager 12 through a UART interface, for supplying power to the monitor and coordinating the operation of the signal processing board .

Among them, the main control board 11 is connected with the signal processing board through the UART interface, and is mainly used for coordinating the signal processing board, the driver board and external interfaces, such as Ethernet port, wireless transmission interface, etc. The processor of the main control board 11 adopts 32bit ARM processing device. The power manager 12 is used to convert the mains power into various power sources required by the oil spill monitoring device, and is preferably composed of an AC/DC power supply, a DC/DC module and an LDO chip.

A preferred embodiment, as shown in Figure 2, the long-distance marine oil spill real-time monitor 2-1 is installed on the support 2-2 of the offshore oil drilling platform. The UV-LED light source 1 in the excitation light device 2-3 is under the control of the high-frequency LED constant current source drive board 9, emits high-frequency stable ultraviolet light 2-5, and converges to the sea level 2-8 through the light source lens 3 , if there is an oil spill at sea level 2-8, the oil spill surface will produce high-frequency fluorescence. The high-frequency fluorescence is collected by the fluorescence lens 4 in the fluorescence receiving device 2-4, passes through the fluorescence filter 8, reaches the photomultiplier tube 2, and is converted into a high-frequency analog voltage signal. The high-frequency analog voltage signal is input to the signal processing board 10, converted into a digital signal, and the digital signal is pre-processed, and the oil spill result is obtained after being processed by the oil spill algorithm. The oil spill result is transmitted to the main control board 11 through the UART interface, and the relevant responsible person is further notified through the network port or remote wireless communication to carry out oil spill emergency treatment.

Compared with the prior art, the beneficial effect of the present invention is that the photomultiplier tube is used as the detector of the weak fluorescent signal, which greatly improves the detection sensitivity and can detect the oil spilled water surface of the long-distance target. As an excitation light source, the narrow-band UV-LED ultraviolet spectral bandwidth is about 15nm, so no light source filter is required, and the LED light-emitting frequency is high, which can realize real-time detection of various oils, basically without misjudgment, especially suitable for offshore oil Drilling platform's demand for oil spill detection.

Claims (10)

1. A long-distance marine oil spill real-time monitor is installed on the support of the offshore oil drilling platform, and is characterized in that it comprises an excitation light device and a fluorescence receiving device installed side by side on the monitor fixed mount, The excitation light device is used to transmit high-frequency stable ultraviolet light to the sea level through a UV-LED light source to monitor the oil spill state at the sea level in real time, and the high-frequency stable ultraviolet light generates high-frequency fluorescence with the oil spill surface at the sea level ; The fluorescence receiving device is used to receive the high-frequency fluorescence generated by the oil spill surface and the high-frequency stable ultraviolet light emitted by the exciting light device, and perform subsequent processing through the photomultiplier tube. 2. A kind of long-distance marine oil spill real-time monitor as claimed in claim 1, is characterized in that, described excitation light device comprises: UV-LED light source, light source lens, light source shade, high-frequency LED constant current source drive Board, light source radiator; The high-frequency LED constant current source driver board is connected to the UV-LED light source for driving the UV-LED light source to emit high-frequency stable ultraviolet light; The light source hood is in the shape of a cylinder and is socketed on the periphery of the UV-LED light source to prevent the high-frequency stable ultraviolet light emitted by the UV-LED light source from directly entering the fluorescence receiving device; The light source lens is arranged at the other end of the light source shade, and is used for converging the high-frequency stable ultraviolet light emitted by the UV-LED light source onto the sea surface target. 3. a kind of remote marine oil spill real-time monitor as claimed in claim 2, is characterized in that, described UV-LED light source is that adopting wavelength is 365nm LED, and spectral bandwidth is the narrow-band UV-LED light source of 15nm; The light source lens is made of quartz glass lens. 4. The long-distance marine oil spill real-time monitor according to any one of claims 1-3, further comprising a light source radiator, which dissipates heat to the UV-LED light source. 5. A kind of long-distance ocean oil spill real-time monitor as claimed in claim 4, is characterized in that, described light source radiator is Peltier refrigeration sheet. 6. A kind of long-distance marine oil spill real-time monitor as claimed in claim 1, is characterized in that, described fluorescence receiving device comprises photomultiplier tube, fluorescent lens, fluorescent filter, fluorescent shade, The fluorescent lens is arranged at one end of the fluorescent light shield, the other end of the fluorescent light shield is sleeved on the photomultiplier tube, and the fluorescent filter is arranged on the photomultiplier tube for receiving The high-frequency fluorescence is converged by the fluorescence lens, passes through the fluorescence filter to the photomultiplier tube, and is converted into a high-frequency analog voltage signal. 7. A kind of long-distance marine oil spill real-time monitor as claimed in claim 6, it is characterized in that, described fluorescent filter selects pass band range to be 400nm-600nm filter, described fluorescent lens selects K9 glass lens for use , the photomultiplier tube is selected from the PMT of ET Company. 8. A kind of remote ocean oil spill real-time monitor as claimed in claim 6, is characterized in that, also comprises signal processing board, and described signal processing board is connected with photomultiplier tube, is used for the high output of photomultiplier tube The frequency analog voltage signal is converted into a DC voltage signal, and the DC voltage signal is converted into a digital signal recognizable by a digital signal processor through an analog-to-digital converter. 9. a kind of remote ocean oil spill real-time monitor as claimed in claim 1, is characterized in that, described signal processing board comprises operational amplifier ADA4891, analog-to-digital converter AD8329 and digital signal processor ADSP21990, The ADA4891 receives the high-frequency analog voltage signal output by the photomultiplier tube, and uses a demodulation circuit composed of the ADA4891 to convert the high-frequency analog voltage signal into a DC voltage signal and then input it to the analog-to-digital converter AD8329, which is converted by the analog-to-digital converter AD8329 After the digital signal is input to the digital signal processor ADSP21990 for digital signal and oil spill algorithm processing. 10. a kind of remote marine oil spill real-time monitor as claimed in claim 8, is characterized in that, also comprises main control board, and power supply manager, and described main control board is respectively connected with signal processing board and power supply by UART interface Manager connection for powering the monitor and coordinating the operation of the signal processing board.