CN101572763A - Digitizing method of weather facsimile signals - Google Patents
Digitizing method of weather facsimile signals Download PDFInfo
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- CN101572763A CN101572763A CNA2008100410138A CN200810041013A CN101572763A CN 101572763 A CN101572763 A CN 101572763A CN A2008100410138 A CNA2008100410138 A CN A2008100410138A CN 200810041013 A CN200810041013 A CN 200810041013A CN 101572763 A CN101572763 A CN 101572763A
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Abstract
The invention discloses a digitizing method of weather facsimile signals. The method mainly comprises the following steps: (1), converting analog signals into digital signals and transmitting the digital signals to an upper computer; (2), firstly, searching an image head corresponding to the received digital signals; (3), finding a row head of a corresponding image and continuously receiving corresponding image signals; (4), judging whether the whole signal receiving is finished or not, going to the step (5) if finishing the signal receiving and ending the whole receiving process and returning to the step (3) if not finishing the signal receiving; and (5), forming an image file according to the received image signals. The invention converts and stores the weather analog signals into the digital signals as a BMP file so as to be beneficial to the weather analysis of the whole course and provide data support for course construction.
Description
Technical field:
The present invention relates to the processing scheme of digital signal, particularly a kind of the weather facsimile signals that receives is carried out method for digitizing.
Background technology:
Along with the quick growth of global economy and the acceleration of economical integration process, marine transportation amount rapid growth, according to statistics, the whole world has 90% the trade of goods to finish by marine transportation, the influence of factors such as busy day by day maritime traffic and life at sea, property, environment impels marine transportation to automation, informationization and security developments.Weather information is one of important information of maritime safety navigation, at present the boats and ships weather information of accepting that rides the sea is mainly derived from the shortwave weather map facsimile equipment, it prints by thermal fax paper, as the reference of ship's navigation by accepting the short-wave signal of each meteorological observatory's issue.Owing to be analog signal, can only handle immediately, can not store.
Because the fast development of computer technology, the information processing technology, sophisticated equipments such as the computer on the ship, IBS are equipped with complete, and weather facsimile signals by after the digitized processing, is stored in the computer, become possibility.Meteorologic signal after the storage helps the meteorologic analysis in whole course line, and for advising providing the data support in the course line.
Summary of the invention:
The present invention is directed to the existing existing problem of meteorologic signal processing method, and proposed a kind of digital method of weather facsimile signals; This method has solved the conversion of meteorological simulation signal to digital signal, by analyzing the characteristics of weather facsimile signals, finished the conversion of signal to image, designed the hardware interface device of USB simultaneously, can easily weather facsimile signals be transferred in the computer, be stored as the BMP file, conveniently check.
In order to achieve the above object, solution provided by the utility model: a kind of digitizing solution of weather facsimile signals, this method mainly may further comprise the steps:
(1) receive analog signal by collection of simulant signal and processing unit, and conversion process becomes digital signal, and passing threshold handles and forms binary signal, after be sent to host computer;
(2) host computer at first finds the initial head of corresponding image according to the initial signal characteristics of weather facsimile signals in the signal that receives;
(3) find the wardrobe of respective image according to the characteristics of the every every trade head of picture signal, and receive image signals corresponding continuously, retrieve wardrobe or image tail signal after this picture signal is received again;
(4) judge according to the form and the characteristics of image tail signal whether whole signal reception is finished, if finish, whole receiving course finishes, and changes step (5) over to, if do not have, gets back to step (3);
(5) data of arrangement reception form image file.
Collection of simulant signal in the described step (1) and processing unit are made up of analog signal digital and USB interface two parts.
Described analog signal digital part is at first passed through low-pass filtering with the analog signal of input, gathers weather facsimile signals and transfers it to digital signal by ADC in the sheet of ARM microcontroller again; Accurate control is regularly interrupted in the acquisition time utilization, is fixed as 0.55ms; The digital signal that collects is transferred to usb segment after treatment.
Described usb segment adopts technical grade low-power consumption USB to change the single-chip bridger of UART, is used for the transfer of data of analog signal digital part and host computer.
Initial signal is 300 hertz a square-wave signal in the described step (2).
The characteristics of digital signal described C1=1/300/2 * sample frequency alternately occurs for continuing C1 " 0 " and C1 " 1 " in the described step (2).
The characteristics of wardrobe are the black line of continuous 20.3ms in the described step (3), C2 " 0 " are continuously promptly arranged, described C2=20.3ms * sample frequency in the signal.
The form of image tail signal is 450 hertz a square wave in the described step (4), and the characteristics of this tail signal are continuous C3 " 0 " and C3 " 1 ", described C3=1/450/2 * sample frequency.
Image file is the BMP form in the described step (5).
The present invention who obtains according to technique scheme, solved of the conversion of meteorological simulation signal to digital signal, by analyzing the characteristics of weather facsimile signals, finished the conversion of signal to image, design the hardware interface device of USB simultaneously, can easily weather facsimile signals be transferred in the computer, be stored as the BMP file, help the meteorologic analysis in whole course line, the course line suggestion provides the data support.
Description of drawings:
Further specify the present invention below in conjunction with the drawings and specific embodiments.
Fig. 1 is a theory diagram of the present invention.
Fig. 2 is the form schematic diagram of weather facsimile signals.
Embodiment:
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
At present the boats and ships weather information of accepting that rides the sea is mainly derived from the shortwave weather map facsimile equipment, and it prints by thermal fax paper, as the reference of ship's navigation by accepting the short-wave signal of each meteorological observatory's issue.Owing to be analog signal, can only handle immediately, can not store.The present invention is directed to such problem, and a kind of digitlization of the weather facsimile signals that receives can being carried out is provided, and the method for storing; The enforcement of this method as shown in Figure 1.
The analog signal format of weather facsimile as shown in Figure 2, its collection of simulant signal and processing unit carry out the analog signal shaping, sampling quantizes, and packs then and is transferred to host computer by USB interface.In host computer, by corresponding software, solve image head according to the form of signal, wardrobe finally form image file, store with the BMP form.
Comprise in collection of simulant signal and the processing unit:
The analog signal digital device: low-pass filtering is at first passed through in the analog signal input, gathers weather facsimile signals and transfers it to digital signal by ADC in the sheet of ARM microcontroller then.Accurate control is regularly interrupted in the acquisition time utilization, is fixed as 0.55ms.The digital signal that collects is transferred to usb segment after treatment.
USB interface: adopt technical grade low-power consumption USB to change the single-chip bridger of UART.
Processing method to the digital signal that receives in the host computer is specific as follows:
(1) at first judges the initial signal that receives facsimile signal, can know that according to the characteristics of initial signal initial signal is 300 hertz a square-wave signal; Can obtain the characteristics of digital signal according to the characteristics of sample frequency and initial signal: the digital signal characteristics of square-wave signal are to continue C1 " 0 " and C1 " 1 " alternately appearance, C1=1/300/2 * sample frequency; Find signal according to above-mentioned digital signal characteristics, promptly find image head with corresponding characteristics.
(2) after finding corresponding image head, judge the head of each row of picture signal, the characteristics of these wardrobe are black lines of continuous 20.3ms, promptly signal has C2 " 0 " continuously, C2=20.3ms * sample frequency; Find the corresponding wardrobe of image according to the wardrobe characteristics, when finding wardrobe, can receive the picture signal of 475ms continuously, this part signal becomes binary signal according to sample frequency with analog signal conversion; When 475ms finishes by the time, retrieve wardrobe or image tail signal more again.
(3) judge to receive whether finish, this image tail signal is 450 hertz a square wave according to the signal format and the characteristics of image tail, its characteristics are for having continuous C3 " 0 " and C3 " 1 ", C3=1/450/2 * sample frequency; Judge whether above-mentioned periodic signal, if having, whole receiving course finishes, if do not have, gets back to step (2).
(4) after reception finished, the data that arrangement receives were according to the format characteristic formation BMP image file of image file BMP.
According to technique scheme with the fax the analog signal sample variance obtain digital signal after, deliver to host computer by USB interface, host computer solves picture signal by software, and the storage on computers.
More than show and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (9)
1, a kind of digitizing solution of weather facsimile signals is characterized in that, this method mainly may further comprise the steps:
(1) receive analog signal by collection of simulant signal and processing unit, and conversion process becomes digital signal, and passing threshold handles and forms binary signal, after be sent to host computer;
(2) host computer at first finds the initial head of corresponding image according to the initial signal characteristics of weather facsimile signals in the signal that receives;
(3) find the wardrobe of respective image according to the characteristics of the every every trade head of picture signal, and receive image signals corresponding continuously, retrieve wardrobe or image tail signal after this picture signal is received again;
(4) judge according to the form and the characteristics of image tail signal whether whole signal reception is finished, if finish, whole receiving course finishes, and changes step (5) over to, if do not have, gets back to step (3);
(5) data of arrangement reception form image file.
2, the digitizing solution of a kind of weather facsimile signals according to claim 1 is characterized in that, collection of simulant signal in the described step (1) and processing unit are made up of analog signal digital and USB interface two parts.
3, the digitizing solution of a kind of weather facsimile signals according to claim 2, it is characterized in that, described analog signal digital part, the analog signal of input is at first passed through low-pass filtering, gather weather facsimile signals and transfer it to digital signal by ADC in the sheet of ARM microcontroller again; Accurate control is regularly interrupted in the acquisition time utilization, is fixed as 0.55ms; The digital signal that collects is transferred to usb segment after treatment.
4, according to the digitizing solution of claim 2 or 3 described a kind of weather facsimile signals, it is characterized in that, described usb segment adopts technical grade low-power consumption USB to change the single-chip bridger of UART, is used for the transfer of data of analog signal digital part and host computer.
5, the digitizing solution of a kind of weather facsimile signals according to claim 1 is characterized in that, initial signal is 300 hertz a square-wave signal in the described step (2).
6, the digitizing solution of a kind of weather facsimile signals according to claim 1 is characterized in that, the characteristics of digital signal described C1=1/300/2 * sample frequency alternately occurs for continuing C1 " 0 " and C1 " 1 " in the described step (2).
7, the digitizing solution of a kind of weather facsimile signals according to claim 1 is characterized in that, the characteristics of wardrobe are the black line of continuous 20.3ms in the described step (3), C2 " 0 " is continuously promptly arranged, described C2=20.3ms * sample frequency in the signal.
8, the digitizing solution of a kind of weather facsimile signals according to claim 1, it is characterized in that, the form of image tail signal is 450 hertz a square wave in the described step (4), and the characteristics of this tail signal are continuous C3 " 0 " and C3 " 1 ", described C3=1/450/2 * sample frequency.
9, the digitizing solution of a kind of weather facsimile signals according to claim 1 is characterized in that, image file is the BMP form in the described step (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2008100410138A CN101572763B (en) | 2008-07-25 | 2008-07-25 | Digitizing method of weather facsimile signals |
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| CN2008100410138A CN101572763B (en) | 2008-07-25 | 2008-07-25 | Digitizing method of weather facsimile signals |
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| CN101572763A true CN101572763A (en) | 2009-11-04 |
| CN101572763B CN101572763B (en) | 2011-02-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102256031A (en) * | 2011-04-02 | 2011-11-23 | 海华电子企业(中国)有限公司 | Method and system for digitally processing shortwave weather facsimile image |
| CN103428401A (en) * | 2013-07-24 | 2013-12-04 | 南京虹航电子科技有限公司 | Digital meteorologic fax machine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4402658C2 (en) * | 1994-01-29 | 1996-01-25 | Meyer Baese Uwe Dipl Ing | Home electronic weather station |
| US6113260A (en) * | 1995-08-16 | 2000-09-05 | Raytheon Company | Configurable interface module |
| CN1968339A (en) * | 2006-02-17 | 2007-05-23 | 姚丽 | Electronic chart and software radio technology-based marine weather facsimile device |
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2008
- 2008-07-25 CN CN2008100410138A patent/CN101572763B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102256031A (en) * | 2011-04-02 | 2011-11-23 | 海华电子企业(中国)有限公司 | Method and system for digitally processing shortwave weather facsimile image |
| CN103428401A (en) * | 2013-07-24 | 2013-12-04 | 南京虹航电子科技有限公司 | Digital meteorologic fax machine |
| CN103428401B (en) * | 2013-07-24 | 2016-06-29 | 南京海善达信息科技有限公司 | Digital meteorologic fax machine |
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| CN101572763B (en) | 2011-02-09 |
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