CN103198288A - Laser barcode scanning device and barcode scanning method thereof based on automatic focus algorithm - Google Patents
Laser barcode scanning device and barcode scanning method thereof based on automatic focus algorithm Download PDFInfo
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- CN103198288A CN103198288A CN2013101327251A CN201310132725A CN103198288A CN 103198288 A CN103198288 A CN 103198288A CN 2013101327251 A CN2013101327251 A CN 2013101327251A CN 201310132725 A CN201310132725 A CN 201310132725A CN 103198288 A CN103198288 A CN 103198288A
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Abstract
The invention provides a laser barcode scanning device and a barcode scanning method thereof based on an automatic focus algorithm. The barcode scanning device comprises a shell body, a main board arranged in the shell body and provided with a central processing unit, a laser diode, an infrared emitter and an infrared receiver. An optical lens is arranged at the front end of the laser diode. The optical lens is fixedly arranged on a cylinder with an axial through hole. The cylinder is sleeved on the laser diode along the axial direction and in the mode of moving forwards and backwards. A coil is wound on the cylinder. A magnet is further fixedly arranged at the rear portion of the cylinder. The main board is further provided with a controller chip connected with the central processing unit. The coil is connected with the controller chip. According to the laser barcode scanning device and the barcode scanning method thereof based on the automatic focus algorithm, limitation of the prior art is overcome, one laser barcode scanning device has the scanning functions of long distance scanning and short distance scanning in a range of large depth of field in a compatible mode, use is convenient, and cost of the scanning device is greatly reduced.
Description
Technical field
The present invention relates to a kind of bar code scan equipment, especially relate to a kind of laser bar code scanning device and bar code scanning method thereof based on auto-focusing algorithm.
Background technology
Barcode scanner is called bar-code reader, bar code scan rifle, bar code scanner, barcode scanner and bar code reader again.It is be used to the arrangement for reading that reads information that bar code comprises, and utilizes optical principle, being transferred to computer or other equipment by data line or wireless mode behind the content decoding of bar code.Barcode scanner is widely used in the demand in a plurality of fields such as business POS POS, express delivery, storage, logistics, books, medicine.
Worldwide, the depth of field of the scanning of laser bar code scanning device (DOF, depth of focus) scope is a difficult problem and the Key Performance Indicator that industry is generally acknowledged.At first the long distance of scanning and the short-range laser bar code equipment of scanning all are that own exclusive optical system is arranged, and therefore general laser bar code scanning device can adopt an intermediate value to seek the balance of long range sweep and short distance scanning.For long distance and short-range scanning requirement, only can specifically design for the client.Use situation in the face of different scanning, the client need use the bar code scan equipment of three kinds of different field depths, and can't use can grow range sweep with a kind of scanning device can short distance scanning, very inconvenient, and increased client's cost greatly.
Summary of the invention
In order to address the above problem, the purpose of this invention is to provide the laser bar code scanning device of a kind of scanning distance wider range (5cm to 10m), to realize the multifunctional application of simultaneously compatible short distance scanning and long range sweep, reduce the cost of scanning device.
In order to achieve the above object, the invention provides a kind of laser bar code scanning device based on auto-focusing algorithm, it comprises the mainboard with central processing unit, laser diode, infrared transmitter and infrared receptacle, the front end of described laser diode is provided with optical lens, described optical lens is fixedly mounted in the cylinder with axially extending bore, it is characterized in that: described cylinder can be set on the described laser diode with seesawing vertically, be wound with coil on the described cylinder, the rear of described cylinder also is installed with magnet, also be provided with the controller chip that is connected with central processing unit on the described mainboard, described coil is connected with described controller chip.
Preferably, described coil is single layer coil.
The present invention also provides a kind of bar code scanning method that adopts above-mentioned bar code scan equipment, it is characterized in that, may further comprise the steps:
Range finding and calculation step: after the start-up system, infrared transmitter sends infrared signal, and receptacle receives the infrared signal of returning, and the master routine by central processing unit calculates the actual range of bar code and the size of bar code then;
The automatic focus calculation procedure: the master routine of central processing unit calculates the laser light relative distance parameter with laser diode with a tight waist according to the actual range of bar code by auto-focusing algorithm, and sends this relative distance parameter to controller chip;
Automatic focus set-up procedure: direction of current and the size of controller chip relative distance parameter adjustment coil with laser diode with a tight waist according to laser light, thereby adjust automatically cylinder move vertically make laser light with a tight waist away from or near laser diode, obtain suitable laser light position with a tight waist.
Owing to adopt technique scheme, a kind of laser bar code scanning device based on auto-focusing algorithm provided by the invention, can be according to the position of infrared transmitter and infrared remote receiver mensuration article or bar code, calculate laser light location parameter with a tight waist by the auto-focusing algorithm of central processing unit, and this parameter is sent in the controller chip, controller chip according to the laser waist location parameter adjust direction of current and the size of described coil, the magnetic field that hot-wire coil produces and the magnetic field of magnet are according to the principle of " same sex is repelled each other; there is a natural attraction between the sexes ", driving cylinder seesaws vertically, thereby make laser diode and optical lens mutually away from or close mutually, thereby can allow according to the position of article or bar code laser light with a tight waist away from near laser diode, realize the compatible short distance scanning of laser bar code scanning device and long range sweep.
Compared to prior art, laser bar code scanning device and bar code scanning method thereof based on auto-focusing algorithm provided by the invention, overcome the limitation of prior art, can realize the scan function of the big field depth (5cm-10m) of the compatible long range sweep simultaneously of a laser bar code scanning device and short distance scanning, use very conveniently, greatly reduce the cost of equipment.
Description of drawings
Fig. 1 the present invention is based on the cylinder of laser bar code scanning device of auto-focusing algorithm and the cross-sectional view of magnet segment.
Fig. 2 is the workflow block diagram of bar code scanning method of the present invention.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiment of the present invention is elaborated.
See also Fig. 1, the invention provides a kind of laser bar code scanning device based on auto-focusing algorithm, it comprises housing, be located at the mainboard with central processing unit in the housing, laser diode 10, infrared transmitter and infrared receptacle, the front end of described laser diode 10 is provided with optical lens 20, described optical lens 20 is fixedly mounted in the cylinder 30 with axially extending bore 31, described cylinder 30 can be set on the described laser diode 10 with seesawing vertically, be wound with single layer coil 40 on the described cylinder 30, the rear of described cylinder 30 also is installed with magnet 50, and magnet 50 is fixedly mounted on enclosure interior.Also be provided with the controller chip that is connected with central processing unit on the described mainboard, described single layer coil 40 is connected with described controller chip.
See also Fig. 2, when adopting above-mentioned laser bar code scanning device scanning barcode, the concrete course of work may further comprise the steps:
Range finding and calculation step: after the start-up system, infrared transmitter sends infrared signal, receptacle receives the infrared signal of returning, master routine by central processing unit ceaselessly calculates the actual range of bar code and the size of bar code then, and it still is the short distance object apart from object that central processing unit is judged as long according to the actual range of bar code.
The automatic focus calculation procedure: the master routine of central processing unit calculates the laser light relative distance parameter with laser diode with a tight waist according to the actual range of bar code by auto-focusing algorithm, and sends this relative distance parameter to controller chip.
Automatic focus set-up procedure: direction of current and the size of controller chip relative distance parameter adjustment coil with laser diode with a tight waist according to laser light, thereby adjust automatically cylinder move vertically make laser light with a tight waist away from or near laser diode, obtain suitable laser light position with a tight waist.
Decoding step: laser light is with a tight waist satisfy the requirement of scanning distance after, laser scanning equipment can be realized the scanning of bar code and decoding.
Adopt laser bar code scanning device of the present invention and bar code scanning method, can realize the bar code automatic focus scanning in 5cm to the 10 meter distance range, very convenient.And traditional laser bar code scanning device needs three laser bar code scanning devices with fixed laser beam waist position to realize in so big field depth.Therefore, the present invention is very easy to user's use, the also lower greatly cost of bar code scan equipment.
Above-described embodiment only is explanation technical conceive of the present invention and characteristics; its purpose is to allow the personage who is familiar with this technology can understand content of the present invention and enforcement according to this; can not limit protection scope of the present invention with this; all equivalences that spirit essence is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (3)
1. laser bar code scanning device based on auto-focusing algorithm, it comprises the mainboard with central processing unit, laser diode, infrared transmitter and infrared receptacle, the front end of described laser diode is provided with optical lens, described optical lens is fixedly mounted in the cylinder with axially extending bore, it is characterized in that: described cylinder can be set on the described laser diode with seesawing vertically, be wound with coil on the described cylinder, the rear of described cylinder also is installed with magnet, also be provided with the controller chip that is connected with central processing unit on the described mainboard, described coil is connected with described controller chip.
2. laser bar code scanning device according to claim 1 is characterized in that, described coil is single layer coil.
3. a bar code scanning method that adopts the described laser bar code scanning device of claim 1 is characterized in that, may further comprise the steps:
Range finding and calculation step: after the start-up system, infrared transmitter sends infrared signal, and receptacle receives the infrared signal of returning, and the master routine by central processing unit calculates the actual range of bar code and the size of bar code then;
The automatic focus calculation procedure: the master routine of central processing unit calculates the laser light relative distance parameter with laser diode with a tight waist according to the actual range of bar code by auto-focusing algorithm, and sends this relative distance parameter to controller chip;
Automatic focus set-up procedure: direction of current and the size of controller chip relative distance parameter adjustment coil with laser diode with a tight waist according to laser light, thereby adjust automatically cylinder move vertically make laser light with a tight waist away from or near laser diode, obtain suitable laser light position with a tight waist.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101327251A CN103198288A (en) | 2013-04-17 | 2013-04-17 | Laser barcode scanning device and barcode scanning method thereof based on automatic focus algorithm |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101327251A CN103198288A (en) | 2013-04-17 | 2013-04-17 | Laser barcode scanning device and barcode scanning method thereof based on automatic focus algorithm |
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| CN103198288A true CN103198288A (en) | 2013-07-10 |
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| CN2013101327251A Pending CN103198288A (en) | 2013-04-17 | 2013-04-17 | Laser barcode scanning device and barcode scanning method thereof based on automatic focus algorithm |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105205426A (en) * | 2015-07-29 | 2015-12-30 | 北京石盾科技有限公司 | Method, system and device for data input of fixed-focus scanning |
| CN107309545A (en) * | 2017-07-10 | 2017-11-03 | 首钢京唐钢铁联合有限责任公司 | A kind of laser welder takes the lead the control method and device of magnetic tape trailer centering camera |
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| CN1080416A (en) * | 1991-12-23 | 1994-01-05 | 欧林巴斯光学工业股份有限公司 | In the different scanning scope, read the apparatus and method of mark |
| CN1726501A (en) * | 2002-12-18 | 2006-01-25 | 讯宝科技公司 | Image scanning device having a system for determining the distance to a target |
| US20080277477A1 (en) * | 2007-05-10 | 2008-11-13 | Serge Thuries | Dynamic focus calibration, such as dynamic focus calibration using an open-loop system in a bar code scanner |
| CN102065172A (en) * | 2009-11-16 | 2011-05-18 | 东信和平智能卡股份有限公司 | Method and device for controlling communication distance of radio frequency SIM card by infrared distance measurement |
| US20120092531A1 (en) * | 2010-10-19 | 2012-04-19 | Hand Held Products, Inc. | Autofocusing optical imaging device |
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2013
- 2013-04-17 CN CN2013101327251A patent/CN103198288A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1080416A (en) * | 1991-12-23 | 1994-01-05 | 欧林巴斯光学工业股份有限公司 | In the different scanning scope, read the apparatus and method of mark |
| CN1726501A (en) * | 2002-12-18 | 2006-01-25 | 讯宝科技公司 | Image scanning device having a system for determining the distance to a target |
| US20080277477A1 (en) * | 2007-05-10 | 2008-11-13 | Serge Thuries | Dynamic focus calibration, such as dynamic focus calibration using an open-loop system in a bar code scanner |
| CN102065172A (en) * | 2009-11-16 | 2011-05-18 | 东信和平智能卡股份有限公司 | Method and device for controlling communication distance of radio frequency SIM card by infrared distance measurement |
| US20120092531A1 (en) * | 2010-10-19 | 2012-04-19 | Hand Held Products, Inc. | Autofocusing optical imaging device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105205426A (en) * | 2015-07-29 | 2015-12-30 | 北京石盾科技有限公司 | Method, system and device for data input of fixed-focus scanning |
| CN107309545A (en) * | 2017-07-10 | 2017-11-03 | 首钢京唐钢铁联合有限责任公司 | A kind of laser welder takes the lead the control method and device of magnetic tape trailer centering camera |
| CN107309545B (en) * | 2017-07-10 | 2019-04-12 | 首钢京唐钢铁联合有限责任公司 | A kind of laser welder takes the lead the control method and device of magnetic tape trailer centering camera |
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Application publication date: 20130710 |