CN1609885A - Variable scanning apparatus and method for laser bar code reading device - Google Patents
Variable scanning apparatus and method for laser bar code reading device Download PDFInfo
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- CN1609885A CN1609885A CN 200310101759 CN200310101759A CN1609885A CN 1609885 A CN1609885 A CN 1609885A CN 200310101759 CN200310101759 CN 200310101759 CN 200310101759 A CN200310101759 A CN 200310101759A CN 1609885 A CN1609885 A CN 1609885A
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Abstract
The laser bar code reader has one bearing frame configured in its casing, and one variable scanning device, which is connected to the bearing frame and drives the bearing frame to swing around a swinging center in preset variable angle and preset frequency. In the laser bar code reader, several reflectors on the bearing frame swing with the bearing frame; and the laser diode generates laser beam projected to one of the reflectors along preset optical path to generate one reference laser scanning line projected to the bar code. In the swinging state of the frame, several variable scanning lines parallel to the reference laser scanning line is generated around the reference laser scanning line.
Description
Technical field
The present invention relates to a kind of scanning technique of laser bar code reading device, particularly a kind of variable scanister and method of laser bar code reading device.
Background technology
The bar code reading device has been widely used in the various fields at present.For example buy at department store, supermarket, commodity, handling of goods and materials ... etc. all generally adopt the bar code reading device as electronic assistance aids in the occasion, by assisting of this bar code reading device, make the staff can be rapidly and read price and other product information of every product efficiently, the calculation process of matching computer again, and can reach save manpower, increase work efficiency, the demand of automatic management.
Because the evolution of technology, make bar code reading technology by early stage simple scanning ray reading method gradually evolution to omnibearing bar code reading technology.In the at present known comprehensive bar code scan reading technique, various design is arranged.
Consult shown in Figure 1ly, it is the configuration stereographic map that shows each associated components of the comprehensive bar code reading device of wherein a kind of tradition, and Fig. 2 is the cut-open view of 2-2 section in the displayed map 1.The comprehensive bar code reading device of this tradition mainly is that the side at base housing 1 is formed with a laser diode accommodation seat 11, for configuration one laser diode 2 (Laser Diode).Have a projecting slot chamber 12 at the top of this laser diode accommodation seat 11, portion can obliquely ccontaining one first reflecting optics 31 within it.Adjacent position in this projecting slot chamber 12 then is formed with a mirror group accommodation chamber 13, and be formed with in a side that is intended for this projecting slot chamber 12 first fluting 131 and towards the front side to being formed with second fluting 132.In this mirror group accommodation chamber 13, dispose second reflecting optics 32, the 3rd reflecting optics 33.This first reflecting optics 31, second reflecting optics 32, the 3rd reflecting optics 33 are required and with angle of inclination configuration, so that the laser beam that this laser diode 2 sent (Laser Beam) can be projected by second fluting 132 of mirror group accommodation chamber 13 via this first reflecting optics 31, second reflecting optics 32 and the 3rd reflecting optics 33 respectively according to the reflection angle of laser beam.
Another side at this base housing 1 then disposes a polygonal mirror 4 (Polygon Mirror) and a reflector group 5, and this reflector group 5 is to be configured between this polygonal mirror 4 and aforesaid the 3rd catoptron 33, and ring is adjacent to this polygonal mirror 4.The bottom of this polygonal mirror 4 links a motor 41, and can rotate at the following of the driving of this motor 41.
The laser beam that laser diode 2 is sent is sequentially via after first reflecting optics 31, second reflecting optics 32 and the 3rd reflecting optics 33, project a laser beam one of them corresponding minute surface by the 3rd reflecting optics 33, by this polygonal mirror 4 this laser beam is projected to one of them reflecting optics of this reflector group 5 again with a reflection lasering beam to this polygonal mirror 4.At last can be again by the reflection of the reflecting optics of this reflector group 5 and project one scan laser beam L11 to target bar code 6, carry out the scanning of bar code and read.And because this polygonal mirror 4 is by 41 driven in rotation of motor, so this laser beam is when throwing to this polygonal mirror 4, can be projected to another reflecting optics of this reflector group 5 by one of them minute surface of this polygonal mirror 4 with different crevice projection angles, so can produce a laser beam flying pattern 60 (Pattern) to target bar code 6, the synoptic diagram that has shown this laser beam flying pattern 60 among Fig. 3, in this laser beam flying pattern 60, include the staggered laser scanning line 61 of a plurality of directions, so can carry out omnibearing bar code scan function this target bar code 6.
As for receiving the light aspect, then sequentially produce by laser beam that the target bar code reflected and to receive the ray laser bundle by reflector group 5, polygonal mirror 4, the 3rd reflecting optics 33 by the reverse path in above-mentioned light path path, the last Photosensing Units (for example photodiode Photo Diode) that is projected to this appropriate position, base housing 1 bottom again by focus lamp 34 focusing that are configured in this base housing 1 inside, receiving this receipts ray laser bundle, and cooperate a control circuit to separate the information of reading this bar code.
In aforesaid traditional bar code scan technology, though comprehensive bar code reading device has preferable bar code reading effect, and more can not be subjected to the restriction of laser beam crevice projection angle and target bar intersymbol, its scanning effect still has the space of improvement.A wherein key factor that influences this bar code reading effect is the number of number of scanning lines, that is this bar code reading device is when projecting the laser scanning pattern to the target bar code, this laser scanning pattern determines the effect that reads of this bar code at the laser scanning line that each time point projected, this number of scanning lines the more, then its scanning effect better.Yet, in this traditional bar code scan technology, change, and its number of scanning lines also can't change, so can't promote its scanning effect certainly because the laser scanning line that the bar code reading device is projected only has on the sweep trace crevice projection angle.
Therefore in fact be necessary to be improved, to increase its laser scanning line and promote its scanning effect at the shortcoming of aforementioned conventional bar code reading device.
Summary of the invention
Edge this, fundamental purpose of the present invention promptly provides a kind of variable scanister of laser bar code reading device, can make this laser bar code reading device by the improvement of structure when carrying out the scanning of target bar code, can produce the effect of variable scanning, to promote its scanning effect.
Another object of the present invention provides a kind of variable scan method of laser bar code reading device, this variable scan method is in the scanning pattern that the laser bar code reading device is produced, except original reference laser sweep trace, more the adjacent domain at this reference laser sweep trace produces many variable sweep traces that are parallel to each other with this reference laser sweep trace, and this laser scanning line number by this doubles.
Above-mentioned purpose of the present invention is realized by following technical scheme.
A kind of variable scanister of laser bar code reading device includes: a base housing; One reflector group, it is the recess area that is arranged on this base housing by the multi-disc reflecting optics with an angle of inclination; An and polygonal mirror; It is characterized in that:
One bearing frame is disposed at the adjacent position of this reflector group;
One variable drive unit is linked to this bearing frame, carries out the swing of predetermined variable angle and predetermined hunting frequency so that this bearing frame under the driving of this variable drive unit, is able to an oscillation centre;
This polygonal mirror; Be carried on this bearing frame, along with the chattering variable angle of this bearing frame and hunting frequency and swing;
Throw a wherein minute surface via preset optical path by the laser beam that laser diode produced of this laser bar code reading device to this polygonal mirror, by this polygonal mirror this laser beam projection is produced reference laser sweep trace projection to this target bar code to the reflecting optics of this reflector group and by this reflecting optics again, and be subjected at this polygonal mirror under the swing situation of bearing frame, and produce many variable sweep traces that are parallel to each other with this reference laser sweep trace in the adjacent domain of this reference laser sweep trace.
The variable scanister of described laser bar code reading device, it is characterized in that: this bearing frame includes a right plate, a left plate, a bearing base plate, and the outer side surface at this right plate and left plate has respectively protruded out a jack-post, and this jack-post is that pivot links the base housing that is combined in this laser bar code reading device.
The variable scanister of described laser bar code reading device is characterized in that: this variable drive unit includes a CD-ROM drive motor, to drive the swing that this bearing frame produces quantitative angle.
The variable scanister of described laser bar code reading device is characterized in that: this reflector group includes three reflecting optics at least.
The variable scanister of described laser bar code reading device is characterized in that: the angle of inclination of each mirror surface of this reflector group is neither together.
The present invention also provides a kind of variable scan method of laser bar code reading device.
A kind of variable scan method of laser bar code reading device, this laser bar code reading device includes at least one laser diode, a plurality of reflecting optics, a polygonal mirror, a reflector group, in order to read the information of a target bar code, the feature of this variable scan method comprises the following steps:
(a) produce a scanning pattern that includes many reference laser sweep traces by this laser bar code reading device and be projected to this target bar code;
(b) under the driving of a variable drive unit, this polygonal mirror is swung with a predetermined chattering variable angle and hunting frequency;
(c) according to this chattering variable angle, and in each reference laser sweep trace adjacent position that this laser bar code reading device is produced, produce at least one variable sweep trace that is parallel to each other with this reference laser sweep trace.
The variable scan method of described laser bar code reading device is characterized in that: this scanning pattern is a comprehensive scanning pattern, and it includes the staggered laser scanning line of a plurality of directions.
The variable scan method of described laser bar code reading device is characterized in that: this chattering variable angle is approximately the 1.5-3 degree.
The variable scan method of described laser bar code reading device is characterized in that: this hunting frequency is approximately per second 10-30 time.
The present invention is to dispose a bearing frame on the base housing of this laser bar code reading device for the technological means that problem adopted that solves known techniques, one variable drive unit then is linked to this bearing frame,, this bearing frame carries out the swing of predetermined variable angle and predetermined hunting frequency so that under the driving of variable drive unit, being able to an oscillation centre.The polygonal mirror of this laser bar code reading device is to be carried on this bearing frame, can be along with the chattering variable angle of this bearing frame and hunting frequency and swing.Can throw a wherein minute surface via preset optical path by the laser beam that laser diode produced of this laser bar code reading device to this polygonal mirror, by this polygonal mirror this laser beam projection is produced reference laser sweep trace projection to this target bar code to the reflecting optics of this reflector group and by this reflecting optics again, and be subjected at this polygonal mirror under the swing situation of bearing frame, and produce many variable sweep traces that are parallel to each other with this reference laser sweep trace in the adjacent domain of this reference laser sweep trace.In the preferred embodiment of the present invention, this this bearing frame includes a right plate, a left plate, a bearing base plate, and the outer side surface at this right plate and left plate has respectively protruded out a jack-post, and this jack-post is the base housing that is attached at this laser bar code reading device.
The present invention contrasts the effect of prior art:
Via the technology used in the present invention means, can be so that the laser bar code reading device be when carrying out the scanning of target bar code, the laser scanning pattern that it produced is except the reference laser sweep trace, can produce many variable sweep traces that are parallel to each other with this reference laser sweep trace in the adjacent domain of this reference laser sweep trace, by the scan mode of its variable, can reach the effect of multiplication sweep trace moment.
For feature of the present invention, effect are had further understanding, enumerate specific embodiment now and be described with reference to the accompanying drawings as follows:
Description of drawings
Fig. 1 is the configuration stereographic map that shows traditional comprehensive each associated components of bar code reading device;
Fig. 2 is the cut-open view of 2-2 section in the displayed map 1;
The synoptic diagram that has shown the laser beam flying pattern among Fig. 3;
Fig. 4 is the stereographic map that shows each associated components of variable scanister of laser bar code reading device of the present invention;
Fig. 5 shows polygonal mirror and the stereographic map of motor bearing on a bearing frame among the present invention;
Fig. 6 is the cut-open view of 6-6 section in the displayed map 4;
Fig. 7 is the cut-open view of 7-7 section in the displayed map 4;
Fig. 8 shows another embodiment of this variable drive unit;
Fig. 9 shows another embodiment of this variable drive unit:
Figure 10 shows the process flow diagram of the present invention when carrying out variable scanning;
Figure 11 shows that the present invention produces the synoptic diagram of many variable sweep traces in the adjacent domain of each reference laser sweep trace of the laser beam flying pattern that produces.
Embodiment
Consult shown in Figure 4ly, it is the stereographic map that shows each associated components of variable scanister of laser bar code reading device of the present invention.As shown in the figure, the variable scanister of laser bar code reading device of the present invention includes members such as a base housing 1, a laser diode 2, a plurality of reflecting optics 31,32,33, a polygonal mirror 4 and reflector group 5 equally.This reflector group 5 is to be configured between this polygonal mirror 4 and the 3rd catoptron 33, and ring is adjacent to this polygonal mirror 4, and the angle of inclination of each mirror surface of reflector group 5 is all difference.
The bottom of this polygonal mirror 4 links a motor 41, and can be under the driving of this motor 41 and rotate.Consult shown in Figure 5ly, it is to show polygonal mirror 4 and the stereographic map of motor 41 bearings on a bearing frame 7 among the present invention, and Fig. 6 is the cut-open view of 6-6 section in the displayed map 4, and Fig. 7 is the cut-open view of 7-7 section in the displayed map 4.As shown in the figure, this polygonal mirror 4 and motor 41 are that bearing is on a bearing frame 7, this bearing frame 7 includes a right plate 71, a left plate 72, a bearing base plate 73, and the outer side surface at this right plate 71 and left plate 72 has respectively protruded out a jack- post 74,75, the pivot that this jack- post 74,75 can be commonly used and pivot link in the axis hole of the base housing 1 that is combined in this laser bar code reading device (consulting shown in Figure 7), so that this whole bearing frame 7 and reflector group 5 are positioned at the adjacent position of this polygonal mirror 4.
And at the wherein side plate of this bearing frame 7 in conjunction with a variable drive unit 8 carry out the swing of predetermined variable angle so that this bearing frame 7 under the driving of this variable drive unit 8, is able to this jack- post 74,75 as oscillation centre.Simultaneously, because the swing of this bearing frame 7, so make this polygonal mirror 4 also swing along with the chattering variable angle of this bearing frame 7.
In the preferred embodiment of the present invention, this variable drive unit 8 is a CD-ROM drive motor 80 (for example a step motor or a servo motor), to drive the swing (consulting shown in Figure 7) that this bearing frame 7 produces quantitative angle.Fig. 8 shows another embodiment of this variable drive unit 8, and it is to include a CD-ROM drive motor 80, a screw rod 81, a follower gear 741, the swing that can make this bearing frame 7 produce quantitative angle equally.Fig. 9 shows another embodiment of this variable drive unit 8, it is to include a pair of magnetic pole 82,83, be configured in bearing frame 7 close positions made from magnetic material, and can be under the control of a control circuit 84, the swing that makes this bearing frame 7 produce quantitative angle.
Based on above-mentioned framework of the present invention, the present invention is when carrying out variable scanning (consulting process flow diagram shown in Figure 10 simultaneously), and it at first is to produce a scanning pattern that includes many reference laser sweep traces by the laser bar code reading device to be projected to this target bar code (step 101).This scanning pattern is to be good with a comprehensive scanning pattern, that is it includes the staggered laser scanning line of a plurality of directions.
When carrying out the scanning of this target bar code, simultaneously can be under the driving of variable drive unit of the present invention, the polygonal mirror that makes this laser bar code reading device is swung (step 102) with a predetermined chattering variable angle and hunting frequency.This chattering variable angle is approximately the 1.5-3 degree, and its hunting frequency is approximately per second 10-30 time.Under this situation, make each laser bar code reading device of the present invention be able to according to this chattering variable angle and hunting frequency, and each the bar reference laser sweep trace adjacent position that is produced at this laser bar code reading device produces at least one variable sweep trace (step 103) that is parallel to each other with this reference laser sweep trace.
Figure 11 shows that the present invention produces the synoptic diagram of many variable sweep traces in the adjacent domain of each reference laser sweep trace of the laser beam flying pattern that produces.The laser beam that laser diode produced of the laser bar code reading device among the present invention can be throwed the wherein minute surface to this polygonal mirror via preset optical path, by this polygonal mirror this laser beam projection is produced 61 projections of many reference laser sweep traces to a target bar code to the reflecting optics of this reflector group and by this reflecting optics again, and be subjected at polygonal mirror under the swing situation of bearing frame, and produce many variable sweep traces 62 that are parallel to each other with this reference laser sweep trace 61 in the adjacent domain of this reference laser sweep trace 61.So the present invention can be so that the laser bar code reading device be when carrying out the scanning of target bar code, the laser scanning pattern that it produced is except the reference laser sweep trace, can produce many variable sweep traces that are parallel to each other with this reference laser sweep trace in the adjacent domain of this reference laser sweep trace, by the scan mode of its variable, can reach the effect of multiplication sweep trace moment.
Combine speech, the value on the true tool industry of the variable scanister of laser bar code reading device of the present invention and method, and have the obvious effect enhancement than known techniques, so the present invention had accorded with the important document of patent already.
But above explanation only is preferred embodiment of the present invention explanation, allly is skillful in this operator when doing other all improvement and variation according to the above embodiment of the present invention explanation.Yet all improvement and variation that these are done according to the embodiment of the invention are in still belonging to the claim that invention spirit and claim of the present invention defined.
Claims (9)
1, a kind of variable scanister of laser bar code reading device includes: a base housing; One reflector group, it is the recess area that is arranged on this base housing by the multi-disc reflecting optics with an angle of inclination; An and polygonal mirror; It is characterized in that:
One bearing frame is disposed at the adjacent position of this reflector group;
One variable drive unit is linked to this bearing frame, carries out the swing of predetermined variable angle and predetermined hunting frequency so that this bearing frame under the driving of this variable drive unit, is able to an oscillation centre;
This polygonal mirror; Be carried on this bearing frame, along with the chattering variable angle of this bearing frame and hunting frequency and swing;
Throw a wherein minute surface via preset optical path by the laser beam that laser diode produced of this laser bar code reading device to this polygonal mirror, by this polygonal mirror this laser beam projection is produced reference laser sweep trace projection to this target bar code to the reflecting optics of this reflector group and by this reflecting optics again, and be subjected at this polygonal mirror under the swing situation of bearing frame, and produce many variable sweep traces that are parallel to each other with this reference laser sweep trace in the adjacent domain of this reference laser sweep trace.
2, the variable scanister of laser bar code reading device according to claim 1, it is characterized in that: this bearing frame includes a right plate, a left plate, a bearing base plate, and the outer side surface at this right plate and left plate has respectively protruded out a jack-post, and this jack-post is that pivot links the base housing that is combined in this laser bar code reading device.
3, the variable scanister of laser bar code reading device according to claim 1 is characterized in that: this variable drive unit includes a CD-ROM drive motor, to drive the swing that this bearing frame produces quantitative angle.
4, the variable scanister of laser bar code reading device according to claim 1 is characterized in that: this reflector group includes three reflecting optics at least.
5, the variable scanister of laser bar code reading device according to claim 1 is characterized in that: the angle of inclination of each mirror surface of this reflector group is neither together.
6, a kind of variable scan method of laser bar code reading device, this laser bar code reading device includes at least one laser diode, a plurality of reflecting optics, a polygonal mirror, a reflector group, in order to read the information of a target bar code, the feature of this variable scan method comprises the following steps:
(a) produce a scanning pattern that includes many reference laser sweep traces by this laser bar code reading device and be projected to this target bar code;
(b) under the driving of a variable drive unit, this polygonal mirror is swung with a predetermined chattering variable angle and hunting frequency;
(c) according to this chattering variable angle, and in each reference laser sweep trace adjacent position that this laser bar code reading device is produced, produce at least one variable sweep trace that is parallel to each other with this reference laser sweep trace.
7, the variable scan method of laser bar code reading device according to claim 6 is characterized in that: this scanning pattern is a comprehensive scanning pattern, and it includes the staggered laser scanning line of a plurality of directions.
8, the variable scan method of laser bar code reading device according to claim 6 is characterized in that: this chattering variable angle is approximately the 1.5-3 degree.
9, the variable scan method of laser bar code reading device according to claim 6, it is characterized in that: this hunting frequency is approximately per second 10-30 time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101017590A CN100403329C (en) | 2003-10-23 | 2003-10-23 | Variable scanning apparatus and method for laser bar code reading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101017590A CN100403329C (en) | 2003-10-23 | 2003-10-23 | Variable scanning apparatus and method for laser bar code reading device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1609885A true CN1609885A (en) | 2005-04-27 |
| CN100403329C CN100403329C (en) | 2008-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101017590A Expired - Fee Related CN100403329C (en) | 2003-10-23 | 2003-10-23 | Variable scanning apparatus and method for laser bar code reading device |
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| CN (1) | CN100403329C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102289652A (en) * | 2011-08-15 | 2011-12-21 | 广州市旭龙条码设备有限公司 | Infrared bar code scanner |
| CN102693408A (en) * | 2012-04-11 | 2012-09-26 | 广州市钛码电子科技有限公司 | Micro laser scanning device and portable terminal thereof |
| CN103743345A (en) * | 2014-01-20 | 2014-04-23 | 长春理工大学 | Object motion track measuring method |
| CN103743344A (en) * | 2014-01-20 | 2014-04-23 | 长春理工大学 | Object motion track measuring system |
| CN104769609A (en) * | 2012-07-31 | 2015-07-08 | 霍尼韦尔国际公司 | Optical reading apparatus having variable settings |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5206491A (en) * | 1990-03-02 | 1993-04-27 | Fujitsu Limited | Plural beam, plural window multi-direction bar code reading device |
| US5979767A (en) * | 1995-08-11 | 1999-11-09 | Scantech B.V. | Portable multi-directional bar code scanner |
| CN2461081Y (en) * | 2001-01-17 | 2001-11-21 | 巨普光电(上海)有限公司 | Double-laser light-source bar code scanner |
-
2003
- 2003-10-23 CN CNB2003101017590A patent/CN100403329C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102289652A (en) * | 2011-08-15 | 2011-12-21 | 广州市旭龙条码设备有限公司 | Infrared bar code scanner |
| CN102693408A (en) * | 2012-04-11 | 2012-09-26 | 广州市钛码电子科技有限公司 | Micro laser scanning device and portable terminal thereof |
| CN104769609A (en) * | 2012-07-31 | 2015-07-08 | 霍尼韦尔国际公司 | Optical reading apparatus having variable settings |
| CN103743345A (en) * | 2014-01-20 | 2014-04-23 | 长春理工大学 | Object motion track measuring method |
| CN103743344A (en) * | 2014-01-20 | 2014-04-23 | 长春理工大学 | Object motion track measuring system |
| CN103743345B (en) * | 2014-01-20 | 2016-09-21 | 长春理工大学 | Movement locus of object measuring method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100403329C (en) | 2008-07-16 |
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Granted publication date: 20080716 Termination date: 20121023 |