CN104463433A - Method for extracting gill net catching state based on fishing boat position data - Google Patents
Method for extracting gill net catching state based on fishing boat position data Download PDFInfo
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Abstract
The invention relates to a method for extracting the gill net catching state based on fishing boat position data. The method includes the following steps that the change of the number of boat position points along with the speed all year round is counted, a speed threshold value is determined, and net releasing time is determined according to the speed threshold value; according to information of the number of the boat position points all year round, a changing curve of square root values of longitude and latitude quadratic sums is acquired, and gill net catching state information is extracted according to the changing curve of the square root values of the longitude and latitude quadratic sums. The method is suitable for extracting the catching state of a gill net fishing boat from Beidou boat position data.
Description
Technical field
The present invention relates to fishing boat accommodation market demand technical field, particularly relate to a kind of method of fishing for state based on fishing boat accommodation data extraction gill net.
Background technology
Fishing boat monitoring system (VMS, Vessel Monitoring System) fishing boat time, position and multidate information can be provided, nearly 50,000 of current China's fishing boat mounting shipping automatic identification equipment (AIS), nearly 50,000 of big-dipper satellite accommodation monitoring, CDMA public's mobile communication equipment 110,000, preliminary realization is to the real-time contact at seagoing fishing vessel accommodation and tracing and monitoring.Study fishing vessel monitoring location analysis fishing boat in the world and fish for state, its method may be summarized to be three kinds: (1) judges to fish for state by the change analyzing ship's speed; (2) judge to fish for state by analyzing trail change; (3) judge to fish for state by analyzing the characteristic composition of vector such as ship's speed, course.Temporal resolution due to the longitude and latitude accommodation data of big-dipper satellite transmission is record once for 3 minutes, and spatial resolution is about 10 meters, and space-time precision is high, real-time.Existing method is not suitable for the accommodation data analysis of the big-dipper satellite of high time resolution, does not have the special fishing boat for big-dipper satellite to fish for state judging method at present.Need to find computing method for specific netting gear, being used for the fishing boat of the Big Dipper accommodation data judged based on high time resolution fishes for state.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind ofly to be extracted gill net based on fishing boat accommodation data and fishes for the method for state, can be applicable to fish for state from Big Dipper accommodation extracting data gillnetter.
The technical solution adopted for the present invention to solve the technical problems is: provide a kind of and extract based on fishing boat accommodation data the method that state fished for by gill net, comprise the following steps:
(1) add up annual accommodation point quantity with velocity variations, determine threshold speed, determine to put the net time according to threshold speed;
(2) obtain the change curve of the square root of longitude and latitude quadratic sum according to annual accommodation point quantity information, extract gill net according to the change curve of the square root of longitude and latitude quadratic sum and fish for status information.
In described step (1), statistics annual accommodation point quantity enters data time berthing in fishing port with removal fishing boat during velocity variations.
In described step (1), statistics annual accommodation point quantity represents the accommodation point amount change with the speed of a ship or plane with during velocity variations by the difference of the accommodation point quantity of adjacent two speed of interval 0.1m/s, and judges threshold value according to this rate of change.
In the change curve of the square root of longitude and latitude quadratic sum described in described step (2), space displacement is short, changes straight segment of curve in time for putting the rear waiting status of net; In the change curve of the square root of described longitude and latitude quadratic sum, space displacement has the change in displacement section of certain inclination for putting net state or receiving net state.
Any one section of distance length length as gill net of putting net state or receiving net state is extracted in the change curve of the square root of described longitude and latitude quadratic sum.
Described net state of putting is distinguished according to threshold speed with receipts net state.
Beneficial effect
Owing to have employed above-mentioned technical scheme, the present invention compared with prior art, has following advantage and good effect: the present invention with velocity variations, determines threshold speed by statistics annual accommodation point quantity; Determine to put the net time according to threshold speed; In conjunction with the change of the square root of longitude and latitude quadratic sum, extract and put net, put net and wait for, receive net state, calculate gill net length, gill net puts the net time, can be applicable to fish for state from Big Dipper accommodation extracting data gillnetter.
Accompanying drawing explanation
Fig. 1 is gill net ship B133184 accommodation point distribution schematic diagram in 2013;
Fig. 2 is gill net ship B133184 speed change curves figure in 36 hours in 2013;
Fig. 3 is gill net ship B133184 accommodation point quantity statistic curve figure in 2013;
Fig. 4 is that gill net ship B133184 accommodation point quantity in 2013 is with speed change curves figure;
Fig. 5 is gill net ship B133184 in 2013 longitude and latitude square root sum square change curves in 36 hours.
Embodiment
Below in conjunction with specific embodiment, set forth the present invention further.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction.
Embodiments of the present invention relate to a kind of method of fishing for state based on fishing boat accommodation data extraction gill net, comprise the following steps: add up annual accommodation point quantity with velocity variations, determine threshold speed, determine to put the net time according to threshold speed; The change curve of the square root of longitude and latitude quadratic sum is obtained according to annual accommodation point quantity information, extract gill net according to the change curve of the square root of longitude and latitude quadratic sum and fish for status information, namely extract and put net, put net wait, receive net state, calculate gill net length, gill net puts the net time, can be applicable to fish for state from Big Dipper accommodation extracting data gillnetter.
The present invention is further illustrated below with specific embodiment.
Jiangsu Hai Touzhen 220kW gill net ship (hereinafter referred to as B133184), within 2013, there are 105859 accommodations point (Fig. 1), put net trend and mostly be thing or southwest-northeast, be mainly distributed in Haizhou Wan fishing ground, Lv Si fishing ground, be distributed in great Sha fishing ground on a small quantity, connect green stone fishing ground.Gill net state can be divided into the casting anchor of non-fishing operation (or drift), navigation, and fishing operation put net, put net after to cast anchor waits, receipts net.
Operations in 1.36 hours roughly rule
Gill net ship B133184 on Dec 15th, 2013 15:12:32 on Dec 16th, 2013 23:57:34 altogether off line 5 times (Fig. 2).Negotiation speed changes in time, the state of the fishing boat that can embody: M and N place is navigation, for gill net is put, wait is netted for putting by net, B place, C place is receipts nets at A place.Fishing boat navigates by water fishing ground, through 5 cycle operations, the then transitions of A ~ C.
2. add up annual accommodation point quantity with velocity variations
There is the threshold value of speed in the conversion of each state as seen from Figure 2, by can find out the distribution (Fig. 3) of these threshold values with the statistics of velocity variations to gill net ship B133184 in 2013 annual accommodation point quantity.Also send accommodation data because fishing boat enters time berthing in fishing port, therefore create the data that of numerous values is 0m/s, in fishing boat condition adjudgement, these data do not affect, and eliminate these data in statistics.There is a peak value at 0.1m/s, fishing boat be in gill net put net after wait for, or cast anchor, drift state; There is a peak value at 0.5m/s, fishing boat is in receipts net state; 3.8m/s place peak value, fishing boat puts net state; 4.9m/s place peak value, fishing boat turns fishing ground.Gill net ship be in wait for and receive the net time longer, therefore peak value is higher.
By the difference of the accommodation point quantity of adjacent two speed of interval 0.1m/s, represent the accommodation point amount change with the speed of a ship or plane.Threshold value can be judged according to rate of change.(Fig. 4)
3. add up the change of the square root of longitude and latitude quadratic sum
The gill net ship B133184 time period in fig. 2, its accommodation point longitude and latitude changes the change of east-west gill net longitude obviously, latitude change is little, if there is gill net south-north direction then latitude change greatly, therefore calculate longitude and latitude square root sum square (Fig. 5), the various trend of gill net can embody.
Break letter in square root change curve marks, and a ~ d is a net, totally 5 nets, and dab is for putting net, and bc waits for after putting net, and cd is for receiving net.Put net after etc. bide one's time, space displacement is little to be changed straight (bc) in time, and receiving net time space has displacement, has the change in displacement (cd) of certain inclination, the distance length of general ab section equals the distance length of cd section, can using the length of cd section as gill net.
Claims (6)
1. extract based on fishing boat accommodation data the method that state fished for by gill net, it is characterized in that, comprise the following steps:
(1) add up annual accommodation point quantity with velocity variations, determine threshold speed, determine to put the net time according to threshold speed;
(2) obtain the change curve of the square root of longitude and latitude quadratic sum according to annual accommodation point quantity information, extract gill net according to the change curve of the square root of longitude and latitude quadratic sum and fish for status information.
2. method of fishing for state based on fishing boat accommodation data extraction gill net according to claim 1, is characterized in that, in described step (1), statistics annual accommodation point quantity enters data time berthing in fishing port with removal fishing boat during velocity variations.
3. method of fishing for state based on fishing boat accommodation data extraction gill net according to claim 1, it is characterized in that, in described step (1), statistics annual accommodation point quantity represents the accommodation point amount change with the speed of a ship or plane with during velocity variations by the difference of the accommodation point quantity of adjacent two speed of interval 0.1m/s, and judges threshold value according to this rate of change.
4. method of fishing for state based on fishing boat accommodation data extraction gill net according to claim 1, it is characterized in that, in the change curve of the square root of longitude and latitude quadratic sum described in described step (2), space displacement is short, changes straight segment of curve in time for putting the rear waiting status of net; In the change curve of the square root of described longitude and latitude quadratic sum, space displacement has the change in displacement section of certain inclination for putting net state or receiving net state.
5. method of fishing for state based on fishing boat accommodation data extraction gill net according to claim 4, it is characterized in that, in the change curve of the square root of described longitude and latitude quadratic sum, extract any one section of distance length length as gill net of putting net state or receiving net state.
6. according to claim 4ly extract gill net based on fishing boat accommodation data and fish for the method for state, it is characterized in that, described in put net state and receive net state and distinguished according to threshold speed.
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| CN201410663843.XA CN104463433B (en) | 2014-11-19 | 2014-11-19 | A kind of method based on fishing boat accommodation data extraction gill net fishing state |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108427824A (en) * | 2018-01-29 | 2018-08-21 | 中国水产科学研究院东海水产研究所 | A method of utilizing accommodation data extraction gill net net length and angle |
| CN110135559A (en) * | 2019-04-28 | 2019-08-16 | 中国水产科学研究院东海水产研究所 | A method of it is thrown the net based on ship position data acquisition and nets position and fishing effort |
| CN114493680A (en) * | 2022-01-06 | 2022-05-13 | 中国水产科学研究院南海水产研究所 | Fishery resource statistical method and system based on spunlace investigation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004000086A (en) * | 2002-05-31 | 2004-01-08 | Furuno Electric Co Ltd | Fishing data storage and reproducing apparatus |
| CN103678902A (en) * | 2013-12-05 | 2014-03-26 | 中国水产科学研究院东海水产研究所 | Method for extracting trawl fishing state from Beidou ship position data |
| CN103812942A (en) * | 2014-02-21 | 2014-05-21 | 北京国交信通科技发展公司 | Fishery administration monitoring system |
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2014
- 2014-11-19 CN CN201410663843.XA patent/CN104463433B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004000086A (en) * | 2002-05-31 | 2004-01-08 | Furuno Electric Co Ltd | Fishing data storage and reproducing apparatus |
| CN103678902A (en) * | 2013-12-05 | 2014-03-26 | 中国水产科学研究院东海水产研究所 | Method for extracting trawl fishing state from Beidou ship position data |
| CN103812942A (en) * | 2014-02-21 | 2014-05-21 | 北京国交信通科技发展公司 | Fishery administration monitoring system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108427824A (en) * | 2018-01-29 | 2018-08-21 | 中国水产科学研究院东海水产研究所 | A method of utilizing accommodation data extraction gill net net length and angle |
| CN108427824B (en) * | 2018-01-29 | 2021-08-31 | 中国水产科学研究院东海水产研究所 | Method for extracting length and angle of gill net by using ship position data |
| CN110135559A (en) * | 2019-04-28 | 2019-08-16 | 中国水产科学研究院东海水产研究所 | A method of it is thrown the net based on ship position data acquisition and nets position and fishing effort |
| CN114493680A (en) * | 2022-01-06 | 2022-05-13 | 中国水产科学研究院南海水产研究所 | Fishery resource statistical method and system based on spunlace investigation |
| CN114493680B (en) * | 2022-01-06 | 2024-05-03 | 中国水产科学研究院南海水产研究所 | Fishery resource statistical method and system based on stream stab net investigation |
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