All-day intelligent monitoring device and method for oil spill on water surface

Abstract

The present invention discloses an all-day intelligent monitoring device and method for oil spill on water surface, the device comprises a spectrometer, a CCD camera, a xenon lamp light source, a light sensor, a main control module and a wireless data transmission module; the spectrometer, the CCD camera, the xenon lamp light source, the light sensor and the wireless data transmission module are respectively connected to the main control module. The method comprises: ① the main control module collects light sensor data to judge whether it is daytime or nighttime: if it is daytime, the xenon lamp light source is not turned on, if it is nighttime, the xenon lamp light source is turned on; ② the spectrometer collects the spectrum data of the sun or xenon lamp reflected by the water surface; ③ the CCD camera collects the water surface image data; ④ the main control module processes the data, judges the oil spill situation according to the spectrometer data and the CCD camera data, if there is oil spill, sends an alarm message to a remote computer through the wireless data transmission module, and sends the oil spill type and oil film thickness information obtained after processing, if there is no oil spill, continues to monitor from ①.

Description

Technical Field

[0001] The invention relates to an all-day intelligent monitoring device and method for oil spill on a water surface, belonging to the field of chemical safety. Background Art

[0002] Oil spills on the water surface are one of the most common water pollutants. Accidents such as ship collisions, capsizing, leakage from submarine oilfields, and blowouts can cause oil leaks, resulting in serious water pollution. Harmful substances directly pollute water quality, endanger the safety of marine plants and animals, damage the marine food chain, and reduce the self-purification capacity of the sea. The soluble aromatic hydrocarbons in petroleum are highly toxic. Once they enter the water body, they will accumulate and migrate in marine organisms for a long time, and eventually enter the human body through the food chain, endangering health. The oil film formed by the oil spill on the water surface can hinder water-air exchange, affect the water surface's absorption, transmission and reflection of electromagnetic wave radiation, weaken the energy of solar radiation entering the water body, directly affect the photosynthesis of phytoplankton, and cause the death of a large number of fish, birds, seaweed, etc.

[0003] Realizing rapid detection and analysis of oil spills on the water surface and accurately obtaining the source, amount and diffusion information of oil spills in the accident waters can provide basic data for the assessment of oil spill pollution and the formulation of prevention and control measures, which is of great practical significance for improving the national and regional oil spill emergency response system and improving my country's emergency response capabilities for oil spill accidents. Among the methods for on-site monitoring of oil pollutants, compared with laser fluorescence method, microwave radiation method, microwave scattering method, etc., the spectral technology monitoring method has a high signal-to-noise ratio, high resolution, and strong ability to classify oil pollutants. However, the current spectral technology monitoring method can only be passively measured during the day, and because it is impossible to correct the spectrum in real time, the error is large. Summary of the invention

[0004] The present invention adopts active and passive combined spectroscopy and on-site real-time correction technology to achieve all-day, unattended, continuous intelligent monitoring of oil spills on water surfaces.

[0005] The present invention adopts the following technical solution:

[0006] The all-day intelligent monitoring device for oil spill on water surface comprises a spectrometer, a CCD camera, a xenon lamp light source, a light sensor, a main control module and a wireless data transmission module; the spectrometer, the CCD camera, the xenon lamp light source, the light sensor and the wireless data transmission module are respectively connected with the main control module.

[0007] Furthermore, the spectrometer, CCD camera, xenon lamp light source and light sensor of the all-day intelligent monitoring device for oil spills on water surface are respectively equipped with transparent glass windows for receiving spectral signals or emitting light.

[0008] Furthermore, the spectrometer, CCD camera and xenon lamp light source are installed on a plane on one side of the device, and the light sensor is installed on a plane on the opposite side of the device.

[0009] Furthermore, when in use, the spectrometer, CCD camera and xenon lamp light source are vertically directed toward the water surface, and the light sensor is directed toward the sky.

[0010] Furthermore, the spectrometer is responsible for collecting spectral data of the sun or xenon lamp light source reflected by the water surface, which is used to analyze whether there is oil spill on the water surface and the thickness of the oil film. The spectrometer collects spectral data in the range of 300nm to 1400nm.

[0011] Furthermore, the CCD camera is responsible for capturing images of the monitoring area, and the brightness data of the monitoring area in the image is used to normalize the spectrometer data and deduct the background effect.

[0012] Furthermore, the xenon lamp light source is used as a light source at night, and the spectrum range is 200nm to 1500nm.

[0013] Furthermore, the light sensor receives direct sunlight and scattered light from the sky to determine whether the scene is daytime or nighttime; the main control module is responsible for controlling and collecting data from each part, and analyzing the oil spill situation on the water surface based on the collected data.

[0014] Furthermore, the wireless data transmission module is used to transmit alarm information and data to a remote computer.

[0015] A method for intelligent monitoring of oil spills on water surfaces around the clock, using a device as described in any one of the above items, the method comprising the following steps:

[0016] ① After installation, when used for the first time, first use the spectrometer to measure the spectral signal of the non-oil spilled area of ​​the water area to be monitored as the water body background spectral data b; ② The main control module collects light sensor data to determine whether it is daytime or nighttime: if it is daytime, the xenon lamp light source is not turned on, if it is nighttime, the xenon lamp light source is turned on; ③ The spectrometer collects spectral data of the sun or xenon lamp reflected from the water surface; ④ The CCD camera collects water surface image data; ⑤ The main control module processes the data and determines the oil spill situation based on the spectrometer data and the CCD camera data. If there is an oil spill, an alarm message is sent to the remote computer through the wireless data transmission module, and the processed oil spill type and oil film thickness information is sent. If there is no oil spill, continue to monitor from ②.

[0017] Furthermore, in step ⑤, the data processing method is:

[0018] (a) Obtain the radiance value l of the spectral sampling area based on the CCD camera data;

[0019] (b) Spectral data s is filtered and denoised to obtain spectral data s′; (s is the original spectral data collected by the spectrometer in step ③);

[0020] (c) s′ is divided by l to obtain the normalized and corrected spectrometer data s″;

[0021] (d) performing a correlation operation between s″ and the stored water background spectrum data b. If the correlation is less than 80, it is judged as oil spill, otherwise it is judged as no oil spill;

[0022] (e) If it is determined to be an oil spill, select the data of 450nm, 550nm, 650nm, 700nm, 800nm, and 1150nm in s″ as feature points, and compare them with the oil feature data in the database to confirm the type of oil spill; (the oil feature data is the spectral feature data of different types of oil stored in the device itself, and each oil feature data contains spectral values ​​at six wavelengths of 450nm, 550nm, 650nm, 700nm, 800nm, and 1150nm);

[0023] (f) After the oil type is determined, select the 730nm-770nm and 540nm-560nm data of s″, and calculate the oil film thickness by calculating the ratio of these two spectral data to the spectral data at 1300nm (the spectral data at 1300nm refers to the spectral data of s″ at 1300nm).

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] 1. The present invention combines the advantages of active and passive methods to achieve 24-hour continuous monitoring of oil spills on the water surface;

[0026] 2. The present invention is different from the traditional method of collecting discrete band spectral data. Instead, it inverts the oil spill situation and oil film thickness based on continuous spectral data, which has higher accuracy;

[0027] 3. The present invention improves the accuracy of oil spill monitoring by performing real-time correction processing on the spectrum. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of the all-day intelligent monitoring device for oil spills on the water surface;

[0029] Figure 2 Workflow diagram of the all-day intelligent monitoring device for oil spills on water surfaces. DETAILED DESCRIPTION

[0030] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. However, the following embodiments are limited to explaining the present invention, and the protection scope of the present invention should include the entire contents of the claims, and through the description of the following embodiments, those skilled in the art can fully implement the entire contents of the claims of the present invention.

[0031] The present invention adopts active and passive combined spectroscopy and on-site real-time correction technology to achieve all-day, unattended, continuous intelligent monitoring of oil spills on water surfaces.

[0032] like Figure 1 As shown in the figure, the all-day intelligent monitoring device for oil spill on water surface mainly includes six parts: spectrometer, CCD camera, xenon lamp light source, light sensor, main control module and wireless data transmission module. The spectrometer, CCD camera, xenon lamp light source, light sensor and wireless data transmission module are connected to the main control module respectively.

[0033] The spectrometer, CCD camera, xenon lamp light source and light sensor of the all-day intelligent monitoring device for surface oil spills are respectively equipped with transparent glass windows for receiving spectral signals or emitting light.

[0034] The spectrometer, CCD camera and xenon lamp light source are installed on a plane on one side of the device, and the light sensor is installed on a plane on the opposite side of the device.

[0035] When in use, the spectrometer, CCD camera and xenon lamp light source are vertically facing the water surface, and the light sensor is facing the sky. Furthermore, the spectrometer is responsible for collecting spectral data of the sun or xenon lamp light source reflected by the water surface, which is used to analyze whether there is oil spill on the water surface and the thickness of the oil film. The spectrometer collects spectral data in the range of 300nm to 1400nm.

[0036] The CCD camera is responsible for capturing images of the monitoring area. The brightness data of the monitoring area in the image is used to normalize the spectrometer data and deduct the background effect.

[0037] Xenon lamp light source is used as a light source at night, and the spectral range is 200nm ~ 1500nm.

[0038] The light sensor receives direct sunlight and scattered light from the sky to determine whether the scene is daytime or nighttime; the main control module is responsible for controlling and collecting data from each part, and analyzing the oil spill situation on the water surface based on the collected data.

[0039] The wireless data transmission module is used to transmit alarm information and data between the main control module and the remote computer.

[0040] like Figure 2As shown, the working process of the above device is as follows: After the above device is installed, the spectrometer is used for the first use to measure the spectral signal of the oil-free area of ​​the water area to be monitored as the water body background spectral data b. ① The main control module collects light sensor data to determine whether it is daytime or nighttime: if it is daytime, the xenon light source is not turned on, if it is nighttime, the xenon light source is turned on; ② The spectrometer collects the spectral data of the sun or xenon lamp reflected by the water surface; ③ The CCD camera collects the water surface image data; ④ The main control module processes the data and determines the oil spill situation based on the spectrometer data and the CCD camera data. If there is oil spill, an alarm message is sent to the remote computer through the wireless data transmission module, and the oil spill type and oil film thickness information obtained after processing are sent. If there is no oil spill, continue to monitor from ①.

[0041] In step ④, the data processing method is:

[0042] (a) Obtain the radiance value l of the spectral sampling area based on the CCD camera data;

[0043] (b) Spectrometer data s is filtered and denoised to obtain spectral data s′;

[0044] (c) s′ is divided by l to obtain the normalized and corrected spectrometer data s″;

[0045] (d) performing a correlation operation between s″ and the stored water background spectrum data b. If the correlation is less than 80, it is judged as oil spill, otherwise it is judged as no oil spill;

[0046] (e) If it is judged to be an oil spill, select the 450nm, 550nm, 650nm, 700nm, 800nm, and 1150nm data in s″ as feature points and compare them with the oil feature data in the database to confirm the type of oil spill;

[0047] (f) After the oil type is determined, the 730nm-770nm and 540nm-560nm data of s″ are selected, and the oil film thickness is obtained by calculating the ratio of these two spectral data to the spectral data at 1300nm of s″.

[0048] The present invention does not elaborate on some of the common technologies of those skilled in the art. The above-described embodiments are only descriptions of preferred implementations of the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementations described. Without departing from the design spirit of the present invention, various modifications and improvements made by ordinary technicians in this field to the technical solution of the present invention should fall within the scope of protection determined by the claims of the present invention.

Claims

1. All-day intelligent monitoring device for oil spill on water surface, characterized in that: The all-day intelligent monitoring device for oil spills on water surfaces adopts active and passive combined spectroscopy and on-site real-time correction technology to achieve all-day, unattended, continuous intelligent monitoring of oil spills on water surfaces; The all-day intelligent monitoring device for oil spills on water surfaces includes a spectrometer, a CCD camera, a xenon lamp light source, a light sensor, a main control module and a wireless data transmission module; The spectrometer, CCD camera, xenon lamp light source, light sensor and wireless data transmission module are respectively connected to the main control module; The spectrometer, CCD camera, xenon lamp light source and light sensor of the all-day intelligent monitoring device for oil spill on water surface are respectively equipped with transparent glass windows for receiving spectral signals or emitting light; The spectrometer, CCD camera and xenon lamp light source are installed on one side of the device, and the light sensor is installed on the opposite side of the device. When in use, the spectrometer, CCD camera and xenon lamp light source are vertically oriented toward the water surface, and the light sensor is oriented toward the sky; The spectrometer is responsible for collecting spectral data of the sun or xenon lamp light source reflected by the water surface, which is used to analyze whether there is oil spill on the water surface and the thickness of the oil film. The spectrometer collects spectral data in the range of 300nm~1400nm; The CCD camera is responsible for capturing images of the monitoring area. The brightness data of the monitoring area in the image is used to normalize the spectrometer data and deduct the background effect. Xenon lamp light source is used as a light source at night, and the spectrum range is 200nm~1500nm; The light sensor receives direct sunlight and scattered light from the sky to determine whether the scene is daytime or nighttime. The main control module is responsible for controlling and collecting data from various parts, and analyzing the oil spill situation on the water surface based on the collected data. The wireless data transmission module is used to transmit alarm information and data to a remote computer; The method for performing all-day intelligent monitoring of oil spills on water surfaces using the all-day intelligent monitoring device for oil spills on water surfaces comprises the following steps: ① After installation, when used for the first time, first use the spectrometer to measure the spectral signal of the oil-free area of ​​the water area to be monitored as the water body background spectral data b; ② The main control module collects light sensor data to determine whether it is daytime or nighttime: if it is daytime, the xenon light source is not turned on, and if it is nighttime, the xenon light source is turned on; ③ The spectrometer collects the spectral data of the sun or xenon lamp reflected by the water surface; ④CCD camera collects water surface image data; ⑤The main control module processes data and determines the oil spill situation based on the spectrometer data and CCD camera data. If there is oil spill, an alarm message is sent to the remote computer through the wireless data transmission module, and the processed oil spill type and oil film thickness information is sent. If there is no oil spill, monitoring continues from ②; In step ⑤, the data processing method is: (a) Obtain the radiance value of the spectral sampling area based on the CCD camera data ; (b) Spectrometer data Filter and denoise to get spectral data ; The original spectral data collected by the spectrometer in step ③; (c) remove , get the normalized and corrected spectrometer data ; (d) With the stored water background spectrum data Perform correlation operation. If the correlation is less than 80, it is judged as oil spill, otherwise it is judged as no oil spill; (e) If it is judged to be an oil spill, select The 450nm, 550nm, 650nm, 700nm, 800nm, and 1150nm data are used as feature points and compared with the oil feature data in the database to confirm the type of oil spill; the oil feature data is the spectral feature data of different types of oil stored in the device itself, and each oil feature data contains spectral values ​​at six wavelengths of 450nm, 550nm, 650nm, 700nm, 800nm, and 1150nm; (f) After the oil type is determined, select The oil film thickness is obtained by calculating the ratio of the spectral data at 730nm~770nm and 540nm~560nm to the spectral data at 1300nm; wherein the spectral data at 1300nm refers to Spectral data at 1300nm.

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