CN1279483C - Bar code scanner and its bar cod scanning method - Google Patents
Bar code scanner and its bar cod scanning method Download PDFInfo
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- CN1279483C CN1279483C CN 200410051150 CN200410051150A CN1279483C CN 1279483 C CN1279483 C CN 1279483C CN 200410051150 CN200410051150 CN 200410051150 CN 200410051150 A CN200410051150 A CN 200410051150A CN 1279483 C CN1279483 C CN 1279483C
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Abstract
The present invention relates to a bar code scanner and a bar code scanning method. A light source and a light sensor are arranged at a single circuit board, and the present invention has the advantages of high speed of reading bar codes, favorable properties of identifying, favorable resolution and high precision; the bar code scanner can rapidly read the bar codes in a long distance. The bar code scanner comprises a printing circuit board, wherein lasers which are used for scanning are emitted from the front end of the circuit board, a semiconductor laser diode power source, a light reflection guide device with the functions of collecting light and scanning, a light swing reflection device, a light sensor, a swing driving coil and a set of signal control and processing circuits are arranged on the circuit board. The light source which comes from a laser diode is reflected by a small mirror used for guiding on a light collection mirror, and then, the light source is guided to the swing reflection mirror to form a horizontal scanning beam which has time difference, and a light rebound signal is formed after the horizontal scanning beam is used for scanning the bar codes of objects at the front end of the circuit board; thereby, the light rebound signal is rebounded by the swing mirror; signals rebounded by light are collected to the light sensor to be detected. Afterwards, filter circuits are demodulated and magnified, and the signals detected by the light sensor are subsequently processed into signals which correspond to the bar codes.
Description
Technical field
The present invention relates to a kind of barcode scanner and bar code scanning method thereof.
Background technology
Bar code scanner now generally is used in each supermarket or sales field, to be used for handling efficiently the commodity that item number or price are encoded with the bar coding mode, the principle of operation of relevant bar code scanner has been found in many prior arts, as: No. 179959 Taiwan patents of bulletin number, or U.S. Pat P5,932, No. 860, however the design of these prior art bar code scanner inside but is very complicated comparatively speaking.
See also Fig. 1, Fig. 1 is the exploded view of known pen type bar code scanner 10.Known bar code scanner 10 includes a housing 12 and a circuit board 14 is arranged in the housing 12, includes an optical sensor 28 and a control circuit (not shown) on the circuit board.In housing 12, still contain an occluder (pupil) 16, lens 18, a light source 22, certain hyte part 20.Bar code scanner 10 still comprises one scan read head 24, and it is most advanced and sophisticated and be provided with one and read lens 26.
Though the design of bar code scanner 10 be it seems very direct, but reality flow process on its output when making these devices is but very complicated, thereby make its price also high, especially four led light sources 22 are owing to must be contained near scanning read head 24 and reading lens 26 parts, its volume must be very little, therefore make its specification special and price is also higher, simultaneously because four led light sources 22 scan read head 24 near front end, its power supply must also must weld power lead 21 when assembling by connecing power lead 21 supplies on the back-end circuit plate 14 in addition.Lens 18 and 26 must be assembled in artificial mode owing to volume is little, more make at its assembling flow path and become complicated.In addition, this bar code scanner still can't be realized the quick of high recognition capability, reads sign indicating number, decoding at a distance.
Summary of the invention
The objective of the invention is to provide a kind of recognition performance height overcoming above-mentioned weak point of the prior art, resolution is strong, precision is high, can read at a distance fast the sign indicating number barcode scanner and bar code scanning method thereof.
Purpose of the present invention can reach by following measure:
This barcode scanner is used for scanning bar code on the article to produce a barcode signal, and its special character is:
This barcode scanner includes:
One printed circuit board (PCB) is arranged in the casing, and this printed circuit board (PCB) includes:
One optical sensor is arranged at the positive back middle-end of printed circuit board (PCB), is used for receiving once what cross modulation returning the bullet light signal, and is converted to corresponding electronic signal;
One wig-wag, be arranged at the middle-end of printed circuit board (PCB), its back is provided with the swing coil, the pendular reflex eyeglass of its front and side constitute the light harvesting catoptron by the sphere light harvesting reflecting optics of fixation clamp location, the luminous point that its swinging mirror sends the laser body is directed on the wabbler mirror forming scanning light beam, and sphere light harvesting catoptron is concentrated the guiding of the reflected light on the bar code on the passback sensor;
One swinging mirror, be arranged at the front end of wig-wag, constitute by the eyeglass on the object of meeting left and right horizontal swing, cause free poor scanning light beam via pendular reflex and will be projeced into light on the bar code in order to the luminous point that sphere light harvesting catoptron is sent and return and play signal and be directed on the spherical mirror of sphere light harvesting catoptron;
One amplifies the demodulation filtering circuit, be arranged at the printed circuit board (PCB) back side, comprise the three level Four amplifying circuits that second amplifying circuit that the IC by model TLC2272 constitutes and IC by model TLC274 constitute, being used for that the electronic signal that optical sensor receives is carried out level Four amplifies, filtering noise information is demodulated into corresponding bar code figure signal;
The digital change-over circuit of one signal is arranged at the printed circuit board (PCB) back side and amplifies between demodulation filtering circuit and the demoder, comprises the analogous circuit that the electronic signal to amplifying that the IC by model TLC274 constitutes is carried out the numerical digit conversion;
One lasing light emitter, be arranged at the lower right corner in printed circuit board (PCB) 1 front and adjacent with optical sensor and sphere light harvesting catoptron, this lasing light emitter is connected with power control circuit, swing control circuit 83 respectively, be used for sending a meticulous luminous point, through behind two secondary reflections to scan along a horizontal direction;
One photoconduction leading-in device, be arranged in the metal crimp deadhead, in order to will from the light source of laser diode through the little mirror reflection of guiding on the sphere light harvesting catoptron after the guiding swinging mirror be formed with the horizontal scanning light beam of the time difference, this scanning light beam can form light after the front end of printed circuit board (PCB) scans the object bar code return the bullet signal, and this light returns and plays the spherical mirror of signal on swinging mirror, sphere light harvesting catoptron and focus on the optical sensor.
Described lasing light emitter includes:
One metal crimp deadhead, on its body, have certain thickness perforation through hole, one end of this perforation through hole is big nose end, and the other end is a small bore end, this perforation through hole endoporus is provided with the position line of a projection, with the groove of corresponding lens jacket parietal layer upper end, so that accurate location, and have and the plurality of fixed hole on the perpendicular body of this perforation through hole;
One laser diode is arranged at the small bore end that the metal crimp deadhead connects through hole;
A series of external members include spring, plum blossom copper sheet, lens and lens jacket; Wherein, lens are contained in the lens jacket, are fixed with the plum blossom copper sheet, and spring, lens jacket are set in the metal crimp deadhead successively, and after withstanding lens jacket with screw laser diode, serial external member are placed in the metal crimp deadhead.
Described lens jacket is positioned at the lens openings at its position, blind end center of circle by a cup-shaped cover, and the stairway degression shape annular opening that the groove that axially is provided with on the overcoat wall shell of this cup-shaped set upper side of lens openings, this cup-shaped cover inwall are provided with is formed.
Described wig-wag includes:
One holder is provided with a hinge, in order to hinged, fixing wig-wag components and parts;
One reflecting optics is loaded on the front end of wig-wag and is connected with swing circle;
One swing circle is connected to the reflecting optics of front end and the magnet of rear end;
One plastic support thin slice is loaded in the hinge of holder by back, gim peg location hinge;
Wherein, this wig-wag causes the scanning light beam with mistiming with the luminous point that the light harvesting catoptron sends via pendular reflex, and the light that will be projeced into again on the bar code returns on the spherical mirror of the signal guiding return of serve face light harvesting catoptron that rebounds.
The lens openings that described lens jacket is provided with by a cup-shaped cover, its position, blind end center of circle, be positioned at half upper and lower groove of this lens openings, be positioned at the groove on the cup-shaped jacket wall shell of this lens openings upper end half groove, the stairway degression shape annular opening that this cup-shaped cover inwall is provided with is formed.
Described fixation clamp is made up of the pilot hole at a ladder frame and two ends thereof.
Described lasing light emitter is a lasing fluorescence diode.
Purpose of the present invention can also reach by following measure:
This bar code scanning method, its special character is that it comprises following steps:
(1) after system start-up, lasing light emitter sends beam signal through power control circuit and the control of swing control circuit;
(2) this beam signal is to after bar code scans on the scan articles, has to return bullet light and get back to the photoconduction leading-in device via the front opening of printed circuit board (PCB);
(3) this photoconduction leading-in device can be received drawing through the light signal that returns bullet and be concentrated to optical sensor, so that be converted to corresponding electronic signal;
(4) this electronic signal is carried out four amplifications through a second amplifying circuit and three level Four amplifying circuits;
(5) bar code after amplifying is returned and is played signal and obtain and the corresponding electronic wave form signal of bar code graphics after the digital conversion of signal, and subsequent demodulation is corresponding barcode signal.
The present invention has the following advantages compared to existing technology: the signal of the present invention after with bar code modulation, emission, just carry out the numerical digit conversion after through twice amplification, thereby making to transmit can also decode, discern under the very weak situation.Therefore, can realize reading at a distance sign indicating number effectively, also strengthen the recognition capability of scanner; Because entire circuit is reasonable in design, simple in structure, the layout of element is good, thereby makes the reaction of circuit very fast, can read sign indicating number fast, and its precision is also higher, and resolution is strong; Help providing high-quality, product cheaply.
Description of drawings
Fig. 1 is the structural representation of known pen type bar code scanner.
Fig. 2 is that system of the present invention constitutes synoptic diagram.
Fig. 3 is a circuit block diagram of the present invention.
Fig. 4 is a circuit diagram of the present invention.
Fig. 5 is the structural representation of lasing light emitter of the present invention.
Fig. 6 is the Facad structure synoptic diagram of lens jacket of the present invention.
Fig. 7 is the reverse side structural representation of lens jacket of the present invention.
Fig. 8 is the structural representation of die casting head of the present invention.
Fig. 9 is the structural representation of fixation clamp of the present invention.
Figure 10 is the structural representation of wig-wag of the present invention.
Figure 11 is that the C of Fig. 9 is to view.
Figure 12 is the structural representation of wig-wag plastic support thin slice of the present invention.
Figure 13 is the structural representation of wig-wag gim peg of the present invention.
Embodiment
The present invention is further detailed in conjunction with the accompanying drawings below:
See also accompanying drawing, this barcode scanner includes:
Being arranged at the interior printed circuit board (PCB) 1 of casing includes:
The optical sensor 26 of the positive back of printed circuit board (PCB) 1 middle-end is used for receiving once what cross modulation and returns the bullet light signal, and is converted to corresponding electronic signal; Be arranged at the middle-end wig-wag 2 of printed circuit board (PCB) 1, its back is provided with swing coil 21, the pendular reflex eyeglass 221 of wig-wag 2 fronts constitutes light harvesting catoptron 22 with the sphere light harvesting reflecting optics 223 that the side is located by fixation clamp 222, and described fixation clamp 222 is made up of the pilot hole 2222 at a ladder frame 2221 and two ends thereof.The luminous point that pendular reflex eyeglass 221 sends lasing light emitter 8 is directed on the pendular reflex eyeglass 221 forming scanning light beam, and sphere light harvesting reflecting optics 223 is concentrated the guiding of the reflected light on the bar code on the light echo sensor 26; The pendular reflex eyeglass 221 that is arranged at wig-wag 2 front ends is made of the eyeglass on the object of a meeting left and right horizontal swing, causes free poor scanning light beam via pendular reflex and will be projeced into light on the bar code in order to the luminous point that sphere light harvesting reflecting optics 223 is sent and return and play signal and be directed on the spherical mirror of sphere light harvesting reflecting optics 223; The amplification demodulation filtering circuit 4 that is arranged at printed circuit board (PCB) 1 back side comprises the three level Four amplifying circuits 42 that second amplifying circuit 41 that the IC by model TLC2272 constitutes and IC by model TLC274 constitute, being used for that the electronic signal that optical sensor 26 receives is carried out level Four amplifies, filtering noise information is demodulated into corresponding bar code figure signal; Be arranged at printed circuit board (PCB) 1 back side and amplify demodulation filtering circuit 4 and the digital change-over circuit 6 of the signal between the demoder 5, comprise that the electronic signal to amplifying that the IC by model TLC274 constitutes carries out the analogous circuit that numerical digit is changed; Be arranged at the lower right corner in printed circuit board (PCB) 1 front and the lasing light emitter 8 adjacent with optical sensor 26 and sphere light harvesting catoptron 223, be connected with power control circuit 82, swing control circuit 83 respectively, be used for sending a meticulous luminous point, through behind two secondary reflections to scan along a horizontal direction; Send the light source of a very meticulous luminous point from lasing light emitter 8, photoconduction leading-in device (not shown) in its lasing light emitter 8 will be in order to will be formed with the horizontal scanning light beam of the time difference from guiding swinging mirror 221 after the little mirror reflection of guiding on the light source process sphere light harvesting reflecting optics 223 of laser diode 32, this scanning light beam can form light after the front end of printed circuit board (PCB) 1 scans the object bar code return the bullet signal, and this light returns and plays the spherical mirror of signal on pendular reflex eyeglass 221, sphere light harvesting reflecting optics 223 and focus on the optical sensor 26.
Described lasing light emitter 8 includes:
On metal crimp deadhead 84, have certain thickness perforation through hole 31, one end of this perforation through hole 31 is big nose ends 311, and the other end is the small bore end (not shown), these perforation through hole 31 endoporus are provided with the position line 312 of a projection, groove 3343 with corresponding lens jacket 334 parietal layers upper end, so that accurate location, and have and plurality of fixed hole 81 on the perpendicular metal crimp deadhead 84 of this perforation through hole 31; Laser diode 32 is arranged at the small bore end (not shown) that metal crimp deadhead 84 connects through hole; Series external member 33 includes spring 331, plum blossom copper sheet 332, lens 333 and lens jacket 334; Wherein, lens 333 are contained in the lens jacket 334, be fixed with plum blossom copper sheet 332, spring 331, lens jacket 334 are set in the metal crimp deadhead 84 successively, and after withstanding lens jacket 334 with screw 335 laser diode 32, serial external member 33 are placed in the metal crimp deadhead 84.
Described lens jacket 334 is by a cup-shaped cover 3341, be positioned at the lens openings 3342 at its position, blind end center of circle, the stairway degression shape annular opening 3344 that the groove 3343 that axially is provided with on the overcoat wall shell of these lens openings 3342 cup-shaped set upper sides, these cup-shaped cover 3341 inwalls are provided with is formed.
Described wig-wag 2 includes:
Be loaded on the front end of wig-wag 2 and enclose the 21 pendular reflex eyeglasses 221 that are connected with swing;
Wherein, this wig-wag 2 causes the scanning light beam with mistiming with the luminous point that light harvesting catoptron 22 sends via pendular reflex, and the light that will be projeced into again on the bar code returns on the spherical mirror of the signal guiding return of serve face light harvesting reflecting optics 223 that rebounds.
The bar code scanning method of this barcode scanner comprises following steps:
(1) after system start-up, lasing light emitter 3 sends beam signal through power control circuit 82 and 83 controls of swing control circuit;
(2) this beam signal is to after bar code scans on the scan articles, has to return bullet light and get back to the photoconduction leading-in device via the front opening of printed circuit board (PCB);
(3) this photoconduction leading-in device can be received drawing through the light signal that returns bullet and be concentrated to optical sensor 26, so that be converted to corresponding electronic signal;
(4) this electronic signal is carried out four amplifications through a second amplifying circuit 41 and three level Four amplifying circuits 42;
(5) bar code after amplifying is returned and is played signal and obtain and the corresponding electronic wave form signal of bar code graphics after the digital conversion of signal, and subsequent demodulation is corresponding barcode signal.
Principle of work is as follows:
After the system start-up, this lasing light emitter 8 sends beam signal behind power control circuit 82 and swing control circuit 83, at this moment, wig-wag 2 causes the scanning light beam of mistiming with the luminous point that light harvesting catoptron 22 sends via pendular reflex, via after the scanning of bar code on the scan articles, have and return bullet light and get back to the photoconduction leading-in device via front opening, and this photoconduction leading-in device can will guide and concentrate on this optical sensor 26 through the light signal that returns bullet, so that be converted to corresponding electronic signal, bar code bounce-back signal after the scanning is after four amplifications of a second amplifying circuit 41 and three level Four amplifying circuits 42, behind the digital change-over circuit 6 of signal, obtain and the corresponding electronic wave form signal of bar code graphics again, and subsequent demodulation is corresponding barcode signal.
The above only is preferred embodiment of the present invention, and all equalizations of being done according to claim scope of the present invention change and modify, and all should belong to the covering scope of claim of the present invention.
Claims (8)
1, a kind of barcode scanner is used for scanning bar code on the article to produce a barcode signal, it is characterized in that:
This barcode scanner includes:
One printed circuit board (PCB) is arranged in the casing, and this printed circuit board (PCB) includes:
One optical sensor is arranged at the positive back middle-end of printed circuit board (PCB), is used for receiving once what cross modulation returning the bullet light signal, and is converted to corresponding electronic signal;
One wig-wag, be arranged at the middle-end of printed circuit board (PCB), its back is provided with the swing coil, the pendular reflex eyeglass of its front and side constitute the light harvesting catoptron by the sphere light harvesting reflecting optics of fixation clamp location, the luminous point that its swinging mirror sends the laser body is directed on the wabbler mirror forming scanning light beam, and sphere light harvesting catoptron is concentrated the guiding of the reflected light on the bar code on the passback sensor;
One swinging mirror, be arranged at the front end of wig-wag, constitute by the eyeglass on the object of meeting left and right horizontal swing, cause free poor scanning light beam via pendular reflex and will be projeced into light on the bar code in order to the luminous point that sphere light harvesting catoptron is sent and return and play signal and be directed on the spherical mirror of sphere light harvesting catoptron;
One amplifies the demodulation filtering circuit, be arranged at the printed circuit board (PCB) back side, comprise the three level Four amplifying circuits that second amplifying circuit that the IC by model TLC2272 constitutes and IC by model TLC274 constitute, being used for that the electronic signal that optical sensor receives is carried out level Four amplifies, filtering noise information is demodulated into corresponding bar code figure signal;
The digital change-over circuit of one signal is arranged at the printed circuit board (PCB) back side and amplifies between demodulation filtering circuit and the demoder, comprises the analogous circuit that the electronic signal to amplifying that the IC by model TLC274 constitutes is carried out the numerical digit conversion;
One lasing light emitter, be arranged at the positive lower right corner of printed circuit board (PCB) (1) and adjacent with optical sensor (26) and sphere light harvesting catoptron (223), this lasing light emitter is connected with power control circuit (82), swing control circuit (83) respectively, be used for sending a meticulous luminous point, through behind two secondary reflections to scan along a horizontal direction;
One photoconduction leading-in device, be arranged in the metal crimp deadhead, in order to will from the light source of laser diode through the little mirror reflection of guiding on the sphere light harvesting catoptron after the guiding swinging mirror be formed with the horizontal scanning light beam of the time difference, this scanning light beam can form light after the front end of printed circuit board (PCB) scans the object bar code return the bullet signal, and this light returns and plays the spherical mirror of signal on swinging mirror, sphere light harvesting catoptron and focus on the optical sensor.
2, barcode scanner according to claim 1 is characterized in that:
Described lasing light emitter includes:
One metal crimp deadhead, on its body, have certain thickness perforation through hole, one end of this perforation through hole is big nose end, and the other end is a small bore end, this perforation through hole endoporus is provided with the position line of a projection, with the groove of corresponding lens jacket parietal layer upper end, so that accurate location, and have the plurality of fixed hole on the perpendicular body of this perforation through hole;
One laser diode is arranged at the small bore end that the metal crimp deadhead connects through hole;
A series of external members include spring, plum blossom copper sheet, lens and lens jacket; Wherein, lens are contained in the lens jacket, are fixed with the plum blossom copper sheet, and spring, lens jacket are set in the metal crimp deadhead successively, and after withstanding lens jacket with screw laser diode, serial external member are placed in the metal crimp deadhead.
3, barcode scanner according to claim 2 is characterized in that:
Described lens jacket is by a cup-shaped cover, the lens openings at its position, blind end center of circle, and the stairway degression shape annular opening that the groove that axially is provided with on the overcoat wall shell of this cup-shaped set upper side of lens openings, this cup-shaped cover inwall are provided with is formed.
4, barcode scanner according to claim 1 is characterized in that:
Described wig-wag includes:
One holder is provided with a hinge, in order to hinged, fixing wig-wag components and parts;
One reflecting optics is loaded on the front end of wig-wag and is connected with swing circle;
One swing circle is connected to the reflecting optics of front end and the magnet of rear end;
One plastic support thin slice is loaded in the hinge of holder by back, gim peg location hinge;
Wherein, this wig-wag causes the scanning light beam with mistiming with the luminous point that the light harvesting catoptron sends via pendular reflex, and the light that will be projeced into again on the bar code returns on the spherical mirror of the signal guiding return of serve face light harvesting catoptron that rebounds.
5, barcode scanner according to claim 2 is characterized in that: described lens jacket by a cup-shaped cover, be positioned at lens openings that its position, blind end center of circle is provided with, at half upper and lower groove of this lens openings, be positioned at the groove on the cup-shaped jacket wall shell of this lens openings upper end half groove, the stairway degression shape annular opening that this cup-shaped cover inwall is provided with is formed.
6, barcode scanner according to claim 1 is characterized in that: described fixation clamp is made up of the pilot hole at a ladder frame and two ends thereof.
7, bar-code scanner according to claim 1 is characterized in that: described lasing light emitter is a lasing fluorescence diode.
8, a kind of bar code scanning method is characterized in that, it comprises following steps:
(1) after system start-up, lasing light emitter sends beam signal through power control circuit and the control of swing control circuit;
(2) this beam signal is to after bar code scans on the scan articles, has to return bullet light and get back to the photoconduction leading-in device via the front opening of printed circuit board (PCB);
(3) this photoconduction leading-in device can be received drawing through the light signal that returns bullet and be concentrated to optical sensor, so that be converted to corresponding electronic signal;
(4) this electronic signal is carried out four amplifications through a second amplifying circuit and three level Four amplifying circuits;
(5) bar code after amplifying is returned and is played signal and obtain and the corresponding electronic wave form signal of bar code graphics after the digital conversion of signal, and subsequent demodulation is corresponding barcode signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410051150 CN1279483C (en) | 2004-08-19 | 2004-08-19 | Bar code scanner and its bar cod scanning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410051150 CN1279483C (en) | 2004-08-19 | 2004-08-19 | Bar code scanner and its bar cod scanning method |
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| CN1588419A CN1588419A (en) | 2005-03-02 |
| CN1279483C true CN1279483C (en) | 2006-10-11 |
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| CN 200410051150 Active CN1279483C (en) | 2004-08-19 | 2004-08-19 | Bar code scanner and its bar cod scanning method |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101661553B (en) * | 2009-09-11 | 2012-03-28 | 深圳市民德电子科技有限公司 | Mini laser scanning device and portable terminal thereof |
| CN102231189B (en) * | 2011-05-12 | 2016-04-13 | 天地融科技股份有限公司 | A kind of image collecting device |
| US9111159B2 (en) * | 2011-09-09 | 2015-08-18 | Metrologic Instruments, Inc. | Imaging based barcode scanner engine with multiple elements supported on a common printed circuit board |
| CN103487104B (en) * | 2013-07-03 | 2016-06-15 | 青岛大学 | A kind of image acquisition identification system and method for capillary pipe liquid level type data |
| CN106066984A (en) * | 2016-07-11 | 2016-11-02 | 深圳市兴通物联科技有限公司 | Laser bar code scan decoder control circuit and barcode scanner |
| CN106066983A (en) * | 2016-07-11 | 2016-11-02 | 深圳市兴通物联科技有限公司 | Laser bar code scanning signal processing circuit and laser bar code scanning device |
| JP6664502B2 (en) * | 2016-09-13 | 2020-03-13 | 三菱電機株式会社 | Galvano scanner |
| CN109388985A (en) * | 2017-08-10 | 2019-02-26 | 广州三码物联科技有限公司 | A kind of bimodulus two-dimensional code scanning device |
| CN112711959B (en) * | 2021-01-15 | 2024-02-02 | 苏州浩创信息科技有限公司 | Packaging structure, scanner and wearable intelligent device |
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