CN101288613A - Digital imaging myopia prevention device and use method thereof - Google Patents
Digital imaging myopia prevention device and use method thereof Download PDFInfo
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- CN101288613A CN101288613A CNA2008100384449A CN200810038444A CN101288613A CN 101288613 A CN101288613 A CN 101288613A CN A2008100384449 A CNA2008100384449 A CN A2008100384449A CN 200810038444 A CN200810038444 A CN 200810038444A CN 101288613 A CN101288613 A CN 101288613A
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Abstract
The invention relates to the technical field of myopia prevention devices in health care products, in particular to a digital imaging myopia prevention device and a using method thereof, the device comprises an image sensor, a main control chip DSP, a rotary dial code switch module and a sound and light alarm module, which is characterized in that the output end of the image sensor is connected with the data input end of the main control chip DSP, the input end of the other part of data of the main control chip DSP is connected with the output end of the rotary dial code switch module; and the output end of the main control chip DSP is connected with the input end of the sound and light alarm module. The digital imaging myopia prevention device can judge whether the writing posture is correct or not without the need of being contacted with the human body, thus preventing the myopia. The usage is convenient, which has no influence on the human work and study.
Description
[technical field]
The present invention relates to myopia preventer technical field in the health product, specifically a kind of digital imaging myopia prevention device and using method thereof.
[background technology]
At present myopia preventer generally adopt position sensor or angular transducer judge the people whether write posture correct.These scheme shortcomings are that myopia preventer need be worn on the person, use inconvenience that the people is felt ill.
[summary of the invention]
The purpose of this invention is to provide a kind of contactless intelligent vision myopia preventer that the people is had no effect, adopt image sensor that people's the posture of writing is carried out imaging, by signal data process chip DSP view data is carried out analytical judgment then, determine whether correct by imaging people posture.As incorrect, adopt acousto-optic to remind, thus the prevention myopia.A kind of digital imaging myopia prevention device, comprise imageing sensor, main control chip DSP, rotation dial-up code switch module, sound and light alarm module, it is characterized in that the outfan of imageing sensor connects the data input pin of main control chip DSP, the data input pin that main control chip DSP goes up except that the outfan of connection layout image-position sensor connects the outfan that rotates dial-up code switch module; The outfan of main control chip DSP connects the input of sound and light alarm module.Imageing sensor is to being carried out imaging by imaging people's the posture of writing, main control chip DSP reads image data.Be provided with code switch in the described rotation dial-up code switch module, display digit on the code switch, digital signal is converted to binary-coded decimal by code switch and exports main control chip DSP to by pin, and digital signal reaches the sound and light alarm module after being handled by main control chip DSP.
The using method of digital imaging myopia prevention device is characterized in that:
A, at first measure, this data setting on the rotation dial-up code switch of myopia preventer, is read by DSP by the wide data D of the actual eye of imaging people;
B, with imageing sensor to being carried out imaging by imaging people's the posture of writing;
C, DSP read the view data from imageing sensor, and data signal is handled;
D, dsp software adopt gradient direction symmetry algorithm analysis identification by the eyes screen position pixel address behind the imaging people screen imaging to view data, draw the eyes center at the coordinate XY on perspective plane and the eyes width data F on perspective plane according to the eyes screen position;
E, dsp software are calculated the eyes center at the coordinate XY on the perspective plane vertical dimension G to the horizontal intermediate line in perspective plane;
F, according to eyes width data F, the actual wide data D of eye and eyes center at the coordinate XY on perspective plane vertical dimension G to the horizontal intermediate line in perspective plane, calculate the vertical dimension R=D * G/F of actual eyes center horizontal intermediate line extension line to the perspective plane;
G, by vertical dimension R add desktop to the perspective plane horizontal intermediate line vertical dimension K, draw actual eyes center to the table distance W;
H, incorrect beeline of posture of definition are fault less than this beeline just by the imaging people;
I, by the incorrect warning circuit that then starts of imaging people posture, adopt sound and light alarm.
The inside of main control chip DSP is provided with the mastery routine operation, and standard C language is adopted in the mastery routine operation.
The present invention need not to contact human body can judge whether write posture correct, pre-myopia prevention.Easy to use, people's work and study there is not influence.
[description of drawings]
Fig. 1 is that hardware of the present invention connects block diagram;
Fig. 2 is hardware basic interface circuit diagram of the present invention (an imageing sensor employing cmos image sensor);
Fig. 3 is a software flow pattern of the present invention;
Fig. 4 is fundamental distance algorithm principle figure of the present invention.
[specific embodiment]
Below in conjunction with drawings and Examples the invention is further specified.
Referring to Fig. 1, a kind of digital imaging myopia prevention device comprises imageing sensor, main control chip DSP, rotation dial-up code switch module, sound and light alarm module.Imageing sensor is connected with main control chip DSP, and imageing sensor is to being carried out imaging by imaging people's the posture of writing, main control chip DSP reads image data.Main control chip DSP connects rotation dial-up code switch module and acousto-optic alarm module respectively, and the sound and light alarm module is provided with warning circuit.Rotation dial-up code switch module is converted to four binary-coded decimals with the decimal scale length data and exports main control chip DSP to, and digital signal reaches the sound and light alarm module after handling through main control chip DSP.
Referring to Fig. 2, wherein imageing sensor adopts cmos image sensor, the sound and light alarm module comprises 555 integrated circuits and buzzer, ten output pins of DOUT0～DOUT9 of CMOS connect ten data input pins of VP1D0～VP1D9 of main control chip DSP respectively, four data input pins of VP2D0～VP2D3 of main control chip DSP connect four output pins of code switch 1 respectively, and four data input pins of VP2D4～VP2D7 connect four output pins of code switch 2 respectively.The HRDY its enable port of main control chip DSP is connected with the reset terminal 4 of 555 chips in the warning circuit.555 chip discharge ends, 7 outer meeting resistance R1 and resistance R 2 one ends, resistance R 1 another termination power, resistance R 2 other ends contacts makes a start 2, threshold values end 6, voltage comparator C1 one end, voltage comparator C1 other end ground connection.Control voltage output end 5 is connected with voltage comparator C2 and ground connection.Signal output part 3 is connected with the positive terminal of buzzer, the negative pole end ground connection of buzzer.The pin function explanation:
Show 0 to 9 tens word on the rotation dial-up code switch, representative is centimetre being the length of unit.The decimal scale length data is converted to four binary-coded decimals by code switch and exports main control chip DSP to by four pins, and digital signal reaches the sound and light alarm module after handling through main control chip DSP.Code switch 1 is the tens word of the wide length of eye.Code switch 2 is unit numbers of the wide length of eye.When eye is wide is 18 centimetres, and code switch 1 pushes 1, and code switch 2 pushes 8.
Fig. 3 is a software flow pattern of the present invention, at first measures by the wide data D of the actual eye of imaging people, and on the rotation dial-up code switch of myopia preventer, DSP reads by main control chip with this data setting.Then with imageing sensor to being carried out imaging by imaging people's the posture of writing.Main control chip DSP reads image data, dsp software adopts gradient direction symmetry algorithm analysis identification by the eyes screen position pixel address behind the imaging people screen imaging to view data.Draw the eyes width data F of eyes center according to the eyes screen position on coordinate XY on perspective plane (being the location of pixels address of eyes center) and perspective plane on the imageing sensor perspective plane.Dsp software is calculated the eyes center at the coordinate XY on the perspective plane vertical dimension G to the horizontal intermediate line in perspective plane then.
Fig. 4 is fundamental distance algorithm principle figure of the present invention, and imageing sensor is the imaging system that is similar to the straight angle, and its perspective plane is a plane, and object is inversely proportional to from sensor distance at the size and the object on perspective plane.At the coordinate XY on perspective plane vertical dimension G, calculate the vertical dimension R=D * G/F of actual eyes center horizontal intermediate line extension line according to eyes width data F, the actual wide data D of eye and eyes center to the perspective plane to the horizontal intermediate line in perspective plane.By vertical dimension R add desktop to the perspective plane horizontal intermediate line vertical dimension K, draw actual eyes center to the table distance W.To be defined as posture less than 30 centimetres incorrect to a table distance W at actual eyes center, if incorrect then start warning circuit by imaging people posture, adopts sound and light alarm.
Claims (4)
1, a kind of digital imaging myopia prevention device, comprise imageing sensor, main control chip DSP, rotation dial-up code switch module, sound and light alarm module, it is characterized in that the outfan of imageing sensor connects the data input pin of main control chip DSP, the data input pin that main control chip DSP goes up except that the outfan of connection layout image-position sensor connects the outfan that rotates dial-up code switch module; The outfan of main control chip DSP connects the input of sound and light alarm module.
2, a kind of digital imaging myopia prevention device according to claim 1, it is characterized in that rotating in the dial-up code switch module and be provided with code switch, display digit on the code switch, digital signal is converted to binary-coded decimal by code switch and exports main control chip DSP to by pin, and digital signal reaches the sound and light alarm module after being handled by main control chip DSP.
3, a kind of using method of digital imaging myopia prevention device is characterized in that:
A, at first measure, this data setting on the rotation dial-up code switch of myopia preventer, is read by DSP by the wide data D of the actual eye of imaging people;
B, with imageing sensor to being carried out imaging by imaging people's the posture of writing;
C, DSP read the view data from imageing sensor, and data signal is handled;
D, dsp software adopt gradient direction symmetry algorithm analysis identification by the eyes screen position pixel address behind the imaging people screen imaging to view data, draw the eyes center at the coordinate XY on perspective plane and the eyes width data F on perspective plane according to the eyes screen position;
E, dsp software are calculated the eyes center at the coordinate XY on the perspective plane vertical dimension G to the horizontal intermediate line in perspective plane;
F, according to eyes width data F, the actual wide data D of eye and eyes center at the coordinate XY on perspective plane vertical dimension G to the horizontal intermediate line in perspective plane, calculate the vertical dimension R=D * G/F of actual eyes center horizontal intermediate line extension line to the perspective plane;
G, by vertical dimension R add desktop to the perspective plane horizontal intermediate line vertical dimension K, draw actual eyes center to the table distance W;
H, incorrect beeline of posture of definition are fault less than this beeline just by the imaging people;
I, by the incorrect warning circuit that then starts of imaging people posture, adopt sound and light alarm.
4, a kind of digital imaging myopia prevention device according to claim 1 is characterized in that the inside of main control chip DSP is provided with the mastery routine operation, and standard C language is adopted in the mastery routine operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100384449A CN101288613A (en) | 2008-06-03 | 2008-06-03 | Digital imaging myopia prevention device and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008100384449A CN101288613A (en) | 2008-06-03 | 2008-06-03 | Digital imaging myopia prevention device and use method thereof |
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| CN101288613A true CN101288613A (en) | 2008-10-22 |
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| CNA2008100384449A Pending CN101288613A (en) | 2008-06-03 | 2008-06-03 | Digital imaging myopia prevention device and use method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103514719A (en) * | 2013-10-15 | 2014-01-15 | 中国科学院深圳先进技术研究院 | Sitting posture correcting method and device |
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2008
- 2008-06-03 CN CNA2008100384449A patent/CN101288613A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103514719A (en) * | 2013-10-15 | 2014-01-15 | 中国科学院深圳先进技术研究院 | Sitting posture correcting method and device |
| CN103514719B (en) * | 2013-10-15 | 2016-03-30 | 中国科学院深圳先进技术研究院 | Correcting sitting posture method and device |
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Open date: 20081022 |