CN104834881A - Bar code reading method capable of being dynamically switched - Google Patents
Bar code reading method capable of being dynamically switched Download PDFInfo
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- CN104834881A CN104834881A CN201410268115.9A CN201410268115A CN104834881A CN 104834881 A CN104834881 A CN 104834881A CN 201410268115 A CN201410268115 A CN 201410268115A CN 104834881 A CN104834881 A CN 104834881A
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- bar code
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000007493 shaping process Methods 0.000 claims description 19
- 230000008901 benefit Effects 0.000 claims description 7
- 230000008569 process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000008520 organization Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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Abstract
A dynamically switchable barcode reading method, comprising: providing a photosensitive element to read a bar code and generate an analog signal; selecting one of a first program and a second program, wherein the second program converts the analog signal into a digital signal after performing a dot-filling operation, and the first program does not perform the dot-filling operation; the digital signal is transmitted to a decoder for decoding.
Description
Technical field
The present invention is relevant with a kind of bar code reading access method, special relevant with the bar code reading access method that a kind of dynamic switches.
Background technology
Bar code reader has been widely used in various field at present.Such as in department store, supermarket, commodity sales field, handling of goods and materials ... etc. in occasion all generally adopt bar code reader as electronic assistance aids, assisting by bar code reader, make staff can read rapidly and efficiently price and other product information of every product, the calculation process of matching computer again, and the demand of saving manpower, promoting work efficiency, automatic management can be reached.
Common product all can be provided with a bar-code label at outside surface or external packing appropriate location, in practical application, by bar-code label after infrared ray or visible light source irradiate, the striped of black can absorb light, white null symbol then by light reflection, then can convert light wave to signal through overscanning reader.Afterwards by built-in or external demoder, by program, signal is translated into a kind of binary code, and the data message after decoding is passed to PC or controller, to obtain the product data representated by bar-code label.
The wherein key factor affecting the reading effect of bar code reader is the power for barcode signal, and it is relevant with scanning distance, angle or light etc. to affect signal power.For trickleer bar code or the poor bar code of contrast, be then not easy identification.Therefore.In traditional bar code reader, usually signal can be connected to an amplifier, in order to be amplified by signal.But, although this amplifier has the function strengthening signal, also the signal of mistake can be amplified and easily cause the distortion of signal simultaneously.Therefore be necessary that the shortcoming for traditional bar code reader is improved in fact, to promote its scanning effect.
Summary of the invention
An object of the present invention is the method for two kinds of bar code readings to be established in a bar code reader simultaneously.
Another object of the present invention is to the bar code reading access method providing a kind of dynamic to switch, it can make bar code reader judge preferably read method when bar code reading via process analysis, preferably reads signal to provide computer at any time.
In order to reach above-mentioned one or part or all of object or other objects, the invention provides the bar code reading access method that a kind of dynamic switches, it comprises the following steps: provide a photo-sensitive cell to read a bar code, and produce a simulating signal; Select execution one first program and the one both one second program, wherein the second program simulating signal is performed one mend point processing after be converted to a digital signal, and simulating signal is converted to a digital signal by the first program and do not comprise performing and mend point processing; Digital signal is sent to a demoder to decode.
In one embodiment, the bar code reading access method that dynamic switches more comprises: provide a control program to select the one of both execution one first program and one second program.
In one embodiment, the step performing the first program more comprises: digital signal is fed back to control program.
In one embodiment, the first program more comprises before simulating signal is converted to a digital signal: provide one first circuit, simulating signal is amplified and filter frequency.
In one embodiment, the first program more comprises: provide a first wave shaping device, simulating signal is converted to digital signal.
In one embodiment, first wave shaping device operates in a microcontroller.
In one embodiment, the second program more comprises: provide a Second Wave shaping device, simulating signal is converted to digital signal, and performs benefit point processing.
In one embodiment, Second Wave shaping device operates in a microcontroller.
In one embodiment, step simulating signal being converted to digital signal more comprises gets point processing, and digital signal has multiple interval, gets point processing and is got at each this interval of digital signal and a bit noted down.
In one embodiment, mend point processing and computing between every bit is obtained one or more.
Accompanying drawing explanation
Fig. 1 is the block diagram of the bar code reading access method that the dynamic of one embodiment of the invention switches;
Fig. 2 is the bar code of one embodiment of the invention and simulating signal thereof and digital signal;
Fig. 3 is the Organization Chart of the bar code reading access method that the dynamic of one embodiment of the invention switches;
Fig. 4 is the Organization Chart got point processing and mend point processing.
[symbol description]
1 bar code
2 simulating signals
3 digital signals
100 photo-sensitive cells
200 control programs
300 first programs
310 first circuit
320 first wave shaping devices
400 second programs
420 Second Wave shaping devices
500 demoders
Embodiment
About addressing other technologies content, feature and effect before the present invention, in the detailed description of following cooperation with reference to a graphic preferred embodiment, can clearly present.The direction term mentioned in following examples such as: upper and lower, left and right, front or rear etc., is only for the direction with reference to alterations.Therefore, these direction terms are only for illustration of being not for limiting the present invention.
Refer to Fig. 1 and Fig. 2, Fig. 1 is the bar code reading access method that the dynamic of one embodiment of the invention switches, and Fig. 2 is the bar code 1 and simulating signal 2 thereof and digital signal 3 that are read.The bar code reading access method that dynamic of the present invention switches is applied in a bar code reader, and comprises the following steps:
Step S10: provide a photo-sensitive cell 100 to read a bar code 1, and produce a simulating signal 2.
Step S20: select execution one first program 300 or one second program 400, if first program 300 of execution, please refer to step S30, second program 400 that performs then please refer to step S40.Step S30 comprises step S31 and S32, and step S40 comprises S41 and S42.
Step S31: simulating signal 2 is amplified and filters frequently.
Step S32: simulating signal 2 is converted to a digital signal 3.
Step S41: perform one and mend point processing.
Step S42: simulating signal 2 is converted to a digital signal 3.
Step S50: digital signal 2 is fed back to step S20.
Step S60: digital signal 2 is sent in a demoder 500 and decodes.
In the present embodiment, obviously can find out that the difference of execution first program 300 and the second program 400 is that (1) second program is converted to digital signal after simulating signal is performed benefit point processing, the first program does not then comprise the step performing and mend point processing.Simulating signal was amplified and filter frequency by (2) first programs before simulating signal is converted to digital signal, and the second program does not then comprise amplifies simulating signal and filter step frequently.
As Fig. 3, it is the Organization Chart of the bar code reading access method of the dynamic switching of one embodiment of the invention, and can simultaneously with reference to the step of figure 1.There is provided a control program 200 to select execution one first program 300 or one second program 400 in step S20.There is provided one first circuit 310 and first wave shaping device 320, first circuit 310 simulating signal to be amplified and filter frequency in step S30, and simulating signal is converted to digital signal by first wave shaping device 320.Wherein first wave shaping device 320 operates in a microcontroller, and its step simulating signal being converted to digital signal comprises gets point processing.One Second Wave shaping device is provided in step S40, and Second Wave shaping device 420 also operates in this microcontroller, simulating signal performs and mends point processing by it, and is converted to digital signal, and the step wherein simulating signal being converted to digital signal comprises gets point processing.
In the present embodiment, simulating signal filter function frequently utilizes a low-pass filter to be filtered out to retain low frequency signal by high-frequency signal by the first circuit 310 of the present invention.First wave shaping device 320 and Second Wave shaping device 420 operate in the microcontroller of one 32 bits.And getting point processing and mending point processing in first wave shaping device 320 and Second Wave shaping device 420 can with reference to figure 4.Fig. 4 is such as the digital signal of a bar code.Get point processing and comprise a benefit point processing, its in a digital signal, each interval is once got a little, such as D1 ~ D7, and these points (D1 ~ D7) are exactly the simulating signal changed along with reading image.Mending point processing is then calculate one or more, such as d1 ~ d6 between each interval of D1 ~ D7.
In addition, the digital signal by the first program 300 or the second program 400 is fed back to control program 200 and carries out signal analysis, digital signal clearly can be produced more quickly to rejudge this bar code by the first program 300 or the second program 400.Further, demoder 500 of the present invention utilizes to be got point processing and mends the D1 ~ D7 that counts, d1 ~ d6 that point processing obtains to judge the boundary position of bar code, and computer then utilizes decoded signal to read the merchandise news stored by this bar code.Simulating signal first need be converted to and can represent merely that black or white digital signal just can be decoded.Judge that the black and method that is white boundary position of bar code is then that simulating signal is carried out second differential, then find out the position of zero-crossing (zero-crossing), that is exactly black and white boundary position.
The bar code reading access method switched by dynamic of the present invention is applied on bar code reader, can make two kinds of read methods with reading state different and switching at runtime, the impact that the external factor (such as manually inclination, light change etc.) in bar code reading process causes can be reduced, computer therefore can be provided preferably to read signal.
Only as described above, be only preferred embodiment of the present invention, when not limiting scope of the invention process with this, the simple equivalence namely generally done according to the claims in the present invention and invention description content changes and modifies, and all still remains within the scope of the patent.Any embodiment of the present invention or claim must not reach whole object disclosed by the present invention or advantage or feature in addition.In addition, summary part and title are only used to the use of auxiliary patent document search, are not used for limiting interest field of the present invention.
Claims (10)
1. a bar code reading access method for dynamic switching, it comprises the following steps: provide a photo-sensitive cell to read a bar code, and produce a simulating signal; Select execution one first program and the one both one second program, wherein this simulating signal is performed one and mends after point processing and be converted to a digital signal by this second program, and this simulating signal is converted to a digital signal by this first program and do not comprise and perform this benefit point processing; And this digital signal is sent to a demoder decodes.
2. the bar code reading access method of dynamic switching as claimed in claim 1, is characterized in that, more comprise: provide a control program to select the one of both execution one first program and one second program.
3. the bar code reading access method of dynamic switching as claimed in claim 2, is characterized in that, more comprise: this digital signal is fed back to this control program.
4. the bar code reading access method of dynamic switching as claimed in claim 1, it is characterized in that, this first program more comprises before this simulating signal is converted to a digital signal: provide one first circuit, this simulating signal is amplified and filter frequency.
5. the bar code reading access method of dynamic switching as claimed in claim 4, it is characterized in that, this first program more comprises: provide a first wave shaping device, this simulating signal is converted to this digital signal.
6. the bar code reading access method of dynamic switching as claimed in claim 5, it is characterized in that, this first wave shaping device operates in a microcontroller.
7. the bar code reading access method of dynamic switching as claimed in claim 1, it is characterized in that, this second program more comprises: provide a Second Wave shaping device, this simulating signal is performed this benefit point processing, and is converted to this digital signal.
8. the bar code reading access method of dynamic switching as claimed in claim 7, it is characterized in that, this Second Wave shaping device operates in a microcontroller.
9. the bar code reading access method of dynamic switching as claimed in claim 1, it is characterized in that, the step this simulating signal being converted to this digital signal more comprises gets point processing, and this digital signal has multiple interval, and this is got point processing and is got at each this interval of this digital signal and a bit noted down.
10. the bar code reading access method of dynamic switching as claimed in claim 1, it is characterized in that, computing between every bit is obtained one or more by this benefit point processing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW103104000 | 2014-02-07 | ||
| TW103104000A TW201531951A (en) | 2014-02-07 | 2014-02-07 | A method for dynamically switchable reading barcode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104834881A true CN104834881A (en) | 2015-08-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410268115.9A Pending CN104834881A (en) | 2014-02-07 | 2014-06-16 | Bar code reading method capable of being dynamically switched |
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| CN (1) | CN104834881A (en) |
| TW (1) | TW201531951A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW280895B (en) * | 1994-07-29 | 1996-07-11 | Psc Inc | |
| TW461196B (en) * | 1999-10-08 | 2001-10-21 | Kenwood Corp | Method and apparatus for interpolating digital signal |
| US20060192011A1 (en) * | 2005-02-25 | 2006-08-31 | Symbol Technologies, Inc. | Bar code signal processing |
| CN101124587A (en) * | 2004-04-16 | 2008-02-13 | 微扫描系统公司 | Barcode scanner with linear automatic gain control (AGC), modulation transfer function detector, and selectable noise filter |
-
2014
- 2014-02-07 TW TW103104000A patent/TW201531951A/en unknown
- 2014-06-16 CN CN201410268115.9A patent/CN104834881A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW280895B (en) * | 1994-07-29 | 1996-07-11 | Psc Inc | |
| TW461196B (en) * | 1999-10-08 | 2001-10-21 | Kenwood Corp | Method and apparatus for interpolating digital signal |
| CN101124587A (en) * | 2004-04-16 | 2008-02-13 | 微扫描系统公司 | Barcode scanner with linear automatic gain control (AGC), modulation transfer function detector, and selectable noise filter |
| US20060192011A1 (en) * | 2005-02-25 | 2006-08-31 | Symbol Technologies, Inc. | Bar code signal processing |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201531951A (en) | 2015-08-16 |
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Application publication date: 20150812 |