CN103150539B - A kind of barcode scanner and bar code scanning method thereof - Google Patents
A kind of barcode scanner and bar code scanning method thereof Download PDFInfo
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- CN103150539B CN103150539B CN201310084698.5A CN201310084698A CN103150539B CN 103150539 B CN103150539 B CN 103150539B CN 201310084698 A CN201310084698 A CN 201310084698A CN 103150539 B CN103150539 B CN 103150539B
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Abstract
The invention provides a kind of barcode scanner, it comprises housing, trigger, the mainboard with central processing element be located in housing, and bar code scan module and sensor devices, described barcode scanner also comprises the infrared distance measurement module for detector bar code distance, and described infrared distance measurement module comprises for sending ultrared transmitter and for receiving the ultrared receptacle that bar code fires back; Depth of field indicating device, it is connected with described mainboard, and the master routine computing of central processing element show that barcode scanner needs the direction of movement and distance and indicator signal is transferred to depth of field indicating device, drives depth of field indicating device to point out.Present invention also offers a kind of bar code scanning method, the method comprises range finding and calculation step, the depth of field point out step, position set-up procedure and decoding step.Compared to prior art, adopt barcode scanner of the present invention and bar code scanning method, make user operation more simple and convenient, the efficiency of bar code scan promotes greatly.
Description
Technical field
The present invention relates to a kind of bar code scanner, especially relate to a kind of barcode scanner and the bar code scanning method thereof that realize depth of field prompting based on infrared distance measurement technology.
Background technology
Barcode scanner, is also called bar-code reader, bar code scan rifle, bar code scanner, barcode scanner and bar code reader.It is for bar code reading comprise the arrangement for reading of information, utilize optical principle, be transferred to computer or other equipment after the content decoding of bar code by data line or wireless mode.Barcode scanner is widely used in the demand in multiple fields such as business POS POS, express delivery, storage, logistics, books, medicine.
Any code reading device has the specific coverage and the depth of field (DOF, depthoffield) that are applicable to bar code reading, and in field depth, code reading device can successful bar code reading.But the depth of field of not all code reading device is all the same, even if for same bar code.Because barcode scanning equipment is used in the different occasion needed different focusing, therefore the same-type code reading device of different company, or the different code reading device of same company, or same equipment is when reading different bar code, their depth of field is different, and difference is very large sometimes.A lot of user does not understand this type of code reading device, usually encounters the phenomenon (very common in the application of super market checkout system) repeatedly attempting still not read when reading code.In fact most of the time, bar code all can be read, but barcode scanner needs place in place, makes bar code get final product successful bar code reading in the coverage and field depth of barcode scanner.
But, use the barcode scanner scanning barcode of prior art, when cannot bar code reading time, barcode scanner can not point out distance between barcode scanner and bar code whether in coverage and field depth, and user does not know this, and how Mobile barcode scanner is with successful bar code reading.In this case, user can only by repeatedly attempting, by barcode scanner near or scan away from bar code, therefore operate and extremely bother, bar code reading efficiency is lower.
Summary of the invention
In order to solve the problem, the object of this invention is to provide a kind of can calculate bar code distance and prompting and guiding user Mobile barcode scanner thus the barcode scanner of successful bar code reading, to simplify bar code scan operation steps, promote bar code scan efficiency.
In order to achieve the above object, the invention provides a kind of barcode scanner, it comprises housing, trigger, the mainboard with central processing element be located in housing, and the bar code scan module be connected with mainboard and sensor devices, it is characterized in that, described barcode scanner also comprises:
Infrared distance measurement module, it is connected with described mainboard with described trigger, to detect bar code and master routine detection signal being transferred to central processing element calculates bar code Distance geometry bar code size, described infrared distance measurement module comprises for sending ultrared transmitter and for receiving the ultrared receptacle that bar code fires back;
Depth of field indicating device, it is connected with described mainboard, and the master routine computing of central processing element show that barcode scanner needs the direction of movement and distance and indicator signal is transferred to depth of field indicating device, drives depth of field indicating device to point out.
When barcode scanner energising is standby, when user triggers trigger start up system, the transmitter of infrared distance measurement module will launch infrared signal, simultaneously the master routine of central processing element starts to start object algorithm thread, and the infrared signal returned according to the receptacle of infrared distance measurement module is ceaselessly according to the distance of algorithm bar code and the concrete scope of bar code and size.
Preferably, described bar code scan module is laser module or the camera module with lighting source.
Preferably, described depth of field indicating device be pilot lamp or hummer or the two all have.
After completing range finding, the master routine of central processing element can according to the initial parameter comparison presetting bar code, the sub-picture that simultaneously sensor devices also can take bar code carries out calculating contrast or MTF numerical value, moving direction and the distance of suggestion is drawn by computing, and indicator signal is transferred to depth of field indicating device, depth of field indicating device is driven to carry out depth of field prompting, such as changed by the color of pilot lamp, or the frequency of flicker, or the audible frequency of hummer, or specific music, or the change of illumination light, or more united application instruct final user to operate.User is under the prompting and guiding of barcode scanner, and Mobile barcode scanner can bar code reading decoding fast.
The present invention also provides a kind of bar code scanning method, it is characterized in that, comprises the following steps:
Range finding and calculation step: after triggering trigger start up system, the transmitter of infrared distance measurement module sends range-measurement infrared, receptacle receives the range-measurement infrared of bar code reflection, then the actual range of bar code and the size of bar code is ceaselessly calculated by the master routine of central processing element, the sensor devices of scanner catches image calculating contrast or the mtf value of bar code simultaneously, by algorithm computing, central processing element show that barcode scanner needs direction and the distance of movement;
Depth of field prompting step: barcode scanner needs the direction of movement and the operation result of distance to send depth of field indicating device to by electronic signal by central processing element, drive depth of field indicating device to carry out depth of field prompting to user, thus prompting user distance and barcode scanner need the direction of movement;
Position set-up procedure: user according to the direction of depth of field prompting mobile adjustment barcode scanner and and bar code between distance;
Decoding step: after the coverage that the distance of bar code enters barcode scanner and field depth, bar code scan module bar code reading is also decoded.
Preferably, described range finding and calculation step also comprise: central processing element utilizes the image calculating mtf value caught to judge whether bar code exposure is suitable.
Preferably, in described depth of field prompting step, in described depth of field prompting step, the mode of depth of field prompting is to be pointed out by hummer and/or the mode of LED light prompting is pointed out user distance and needed the direction of movement.Further, the mode of described hummer prompting is the frequency sound that utilizes hummer different or pipes continuously or play specific music to point out user distance and to need the direction of movement.Further, the mode of described LED light prompting is that the flashing mode that utilizes LED light different or the display of different colors are pointed out user distance and needed the direction of movement.
Preferably, described decoding step also comprises: utilize the bar code actual range that the master routine of central processing element calculates, and the focal position adjustment triggering automatic focus-adjusting lens realizes decoding.
Compared to prior art, barcode scanner provided by the invention and bar code scanning method, realize depth of field prompting based on infrared distance measurement technology, be very easy to the operation of scanning input bar code, improve bar code scan efficiency.
Accompanying drawing explanation
Fig. 1 is the structure perspective diagram of barcode scanner of the present invention.
Fig. 2 is the workflow block scheme of barcode scanner of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiment of the present invention is described in detail.
Refer to Fig. 1, the invention provides a kind of barcode scanner, it comprises housing 1, trigger 2, the mainboard 9 with central processing element be located in housing, and the bar code scan module 6 to be connected with mainboard 9 and sensor devices 11, described barcode scanner also comprises button 3, windowpane 4, infrared distance measurement module 5, the depth of field indicating device comprising LED light 7 and hummer 8 and the data be located on mainboard 1 and power interface 10.In the present embodiment, bar code scan module 6 can be mode of laser group or the camera module with lighting source.
Described infrared distance measurement module 5 is connected with described mainboard with described trigger, to detect bar code and master routine detection signal being transferred to central processing element calculates bar code Distance geometry bar code size, described infrared distance measurement module comprises for sending ultrared transmitter and for receiving the ultrared receptacle that bar code fires back.
Described pilot lamp 7 is connected with described mainboard with hummer 8, and the master routine computing of central processing element show that barcode scanner needs the direction of movement and distance and indicator signal is transferred to pilot lamp 7 and hummer 8, and driving pilot lamp 7 and hummer 8 are pointed out.
Refer to Fig. 2, adopt the barcode scanner of the present embodiment to carry out the bar code scanning method of bar code scan, specifically comprise the following steps:
Start up system: under barcode scanner energising holding state, trigger trigger 2, press the button 3 under the effect of trigger 2, system starts, and bar code scan module 6 and infrared distance measurement module 5 are started working simultaneously.When bar code scan module 6 is laser module, after system starts, laser module lase.When bar code scan module 6 is for having the camera module of mains lighting supply, system will launch lighting source after starting.
Range finding and calculation step: after triggering trigger 2 start up system, the transmitter of infrared distance measurement module 5 sends range-measurement infrared, receptacle receives the range-measurement infrared of bar code reflection, then the actual range of bar code and the size of bar code is ceaselessly calculated by the master routine of central processing element, the sensor devices 11 of scanner catches image calculating contrast or the mtf value of bar code simultaneously, by algorithm computing, central processing element show that barcode scanner needs direction and the distance of movement.When bar code scan module 5 is for having the camera module of lighting source, judge whether bar code exposes suitable by calculating mtf value simultaneously.
Depth of field prompting step: barcode scanner needs the direction of movement and the operation result of distance to send LED light 7 and hummer 8 to by electronic signal by central processing element, driving LED pilot lamp 7 and hummer 8 couples of users carry out depth of field prompting, thus prompting user distance and barcode scanner need the direction of movement.
The mode that mode is pointed out specifically by hummer 8 and/or LED light 7 is pointed out of depth of field prompting is pointed out user distance and is needed the direction of movement.Further, the mode that described hummer 8 is pointed out is the frequency sound that utilizes hummer 8 different or pipes continuously or play specific music to point out user distance and to need the direction of movement.Further, the mode that described LED light 7 is pointed out is utilize the different flashing mode of LED light 7 or the display of different colors to point out user distance and need the direction of movement.
Position set-up procedure: user according to the direction of depth of field prompting mobile adjustment barcode scanner and and bar code between distance.
Decoding step: after the coverage that the distance of bar code enters barcode scanner and field depth, bar code scan module bar code reading is also decoded.When bar code scan module has automatic focus-adjusting lens, utilize the bar code actual range that the master routine of central processing element calculates, the focal position adjustment triggering automatic focus-adjusting lens realizes decoding.
Above-described embodiment is only for illustrating technical conceive of the present invention and feature; its object is to person skilled in the art can be understood content of the present invention and implement according to this; can not limit the scope of the invention with this; all equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (7)
1. a barcode scanner, it comprises housing, trigger, the mainboard with central processing element be located in housing, and the bar code scan module be connected with mainboard and sensor devices, and it is characterized in that, described barcode scanner also comprises:
Infrared distance measurement module, it is connected with described mainboard with described trigger, to detect bar code and master routine detection signal being transferred to central processing element calculates bar code Distance geometry bar code size, described infrared distance measurement module comprises for sending ultrared transmitter and for receiving the ultrared receptacle that bar code fires back;
Depth of field indicating device, it is connected with described mainboard, and the master routine computing of central processing element show that barcode scanner needs the direction of movement and distance and indicator signal is transferred to depth of field indicating device, drives depth of field indicating device to point out;
Described bar code scan module is the camera module with lighting source, the sensor devices of scanner catches the image of bar code, described central processing element utilizes the image calculating mtf value caught to judge whether bar code exposure is suitable, show that barcode scanner needs direction and the distance of movement by algorithm computing.
2. a kind of barcode scanner according to claim 1, is characterized in that: described depth of field indicating device be pilot lamp or hummer or the two all have.
3. a bar code scanning method, is characterized in that, comprises the following steps:
Range finding and calculation step: after triggering trigger start up system, the transmitter of infrared distance measurement module sends range-measurement infrared, receptacle receives the range-measurement infrared of bar code reflection, then the actual range of bar code and the size of bar code is ceaselessly calculated by the master routine of central processing element, the sensor devices of scanner catches the image of bar code simultaneously, when bar code scan module is the camera module with lighting source, after system starts, described bar code scan module will launch lighting source; Central processing element utilizes the image calculating mtf value caught to judge whether bar code exposure is suitable, and show that barcode scanner needs direction and the distance of movement by algorithm computing;
Depth of field prompting step: barcode scanner needs the direction of movement and the operation result of distance to send depth of field indicating device to by electronic signal by central processing element, drive depth of field indicating device to carry out depth of field prompting to user, thus prompting user distance and barcode scanner need the direction of movement;
Position set-up procedure: user according to the direction of depth of field prompting mobile adjustment barcode scanner and and bar code between distance;
Decoding step: after the coverage that the distance of bar code enters barcode scanner and field depth, bar code scan module bar code reading is also decoded.
4. a kind of bar code scanning method according to claim 3, is characterized in that, in described depth of field prompting step, the mode of depth of field prompting is to be pointed out by hummer and/or the mode of LED light prompting is pointed out user distance and needed the direction of movement.
5. a kind of bar code scanning method according to claim 4, is characterized in that, the mode of described hummer prompting is the frequency sound that utilizes hummer different or pipes continuously or play specific music to point out user distance and to need the direction of movement.
6. a kind of bar code scanning method according to claim 5, is characterized in that, the mode of described LED light prompting is that the flashing mode that utilizes LED light different or the display of different colors are pointed out user distance and needed the direction of movement.
7. a kind of bar code scanning method according to claim 3, is characterized in that, described decoding step: also comprise: utilize the bar code actual range that the master routine of central processing element calculates, and the focal position adjustment triggering automatic focus-adjusting lens realizes decoding.
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| CN201310084698.5A CN103150539B (en) | 2013-03-18 | 2013-03-18 | A kind of barcode scanner and bar code scanning method thereof |
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| CN201310084698.5A CN103150539B (en) | 2013-03-18 | 2013-03-18 | A kind of barcode scanner and bar code scanning method thereof |
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| TWI595426B (en) * | 2016-03-24 | 2017-08-11 | 佳世達科技股份有限公司 | Barcode decoding method |
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| CN104484642A (en) * | 2015-01-06 | 2015-04-01 | 王启云 | Hand-held bar-code scanner |
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