CN1426026A - Medium surface reader - Google Patents
Medium surface reader Download PDFInfo
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- CN1426026A CN1426026A CN 02155882 CN02155882A CN1426026A CN 1426026 A CN1426026 A CN 1426026A CN 02155882 CN02155882 CN 02155882 CN 02155882 A CN02155882 A CN 02155882A CN 1426026 A CN1426026 A CN 1426026A
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- medium
- reading device
- money coin
- hard money
- dielectric surface
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Abstract
The invention provides a medium surface reader capable of accurately and clearly reading a medium surface by providing an inclined irradiating means for clearly irradiating an edge portion of the medium surface and forming a long shadow suiting image acquisition in reading of the medium surface. In the medium surface reader, an top face side of a medium placed and conveyed on a conveyance face of a conveying means is irradiated and the edge portion of an irradiated medium top face is read by a reading means. It is characterized in that the reader is provided with the inclined irradiating means for irradiating the top face and each edge portion of a medium outer circumferential rim part of the medium conveyed by the conveying means from an obliquely upward direction corresponding to a reading position of the reading means, and a width guiding means for allowing inclined irradiation to the medium top face and the medium outer circumferential rim part from the inclined irradiating means and guiding conveyance of the medium in a conveyance width direction.
Description
Technical field
The present invention for example relates to the dielectric surface reading device that constituted in the automated transaction machine inside of handling the hard money coin, more particularly is the relevant dielectric surface reading device with high recognition performance that can high precision identification medium kind.
Background technology
Generally speaking, the reading device that reads dielectric surface figures such as hard money coin, coin is to transport to be provided with on the path at the medium that transports along load medium to read detecting sensor and material detecting sensor, reads successively and discerns by the various media of transporting by these sensors.
Described read sensor for example is that the irradiates light that will shine with LED shines hard money coin surface, and is subjected to the reflected light of its surfacial pattern light to read the surfacial pattern of medium afterwards with ccd image sensor.
In this case, as Fig. 6 institute method, read the position above be provided with LED61, when shining from this top E when below, just be difficult to clearly display as the shadow of the represented trickle marginal portion of the surfacial pattern of medium 62.Its result is so because not fogging Chu is not emphasized in the marginal portion, use ccd image sensor 63 to take the difficulty that just becomes.
Because this point, in order on ccd image sensor, to obtain the image of high-contrast, with direction of illumination be not from directly over but carry out oblique illumination from the oblique upper of medium, will make the shadow of marginal portion do long (elongation) like this, that can improve ccd image sensor like this is subjected to optical property (for example with reference to patent documentation 1).
But as shown in Figure 7, the LED71 of irradiation usefulness for example is configured in two oblique uppers of medium 72 left and right sides and is set at when being direction of illumination from two sides, owing to exist the laterally steering plate 73 of medium 72 guiding carriage directions, so this transverse guides 73 has just been blocked the part of oblique illumination light 74 in the both sides of transporting the path.As shown in Figure 8, obtain the regular of image by ccd image sensor and read zone 81 owing to be to shine from two sides, so be restricted near centre, when medium 82 reads that zone 81 (in the scopes) run off and when passing through from this, the image of the neighboring part 83 that has run off is not read because of shortcoming, so, will to be judged as be the medium of diameter less than regular size to medium.
For example, as shown in Figure 9, φ 20 minor diameter hard money coin 91 and φ 25 major diameter hard money coin 92 these two hard money coin 91 of varying in size in identification, under 92 the situation, when the view data of two hard money coin is compared, perhaps, its view data separately will have the part shortcoming, so two hard money coin 91,92 view data is compared its standard deviation in ± 4mm scope with normal value, in this standard deviation scope, two hard money coin 91,92 view data produces the coincidence surveyed area 93 that can not discern because of a part is overlapping, cause accuracy of identification to descend owing to produced this coincidence zone 93.
In addition, also have a kind of reading device to be, from the below below glass plate irradiation hard money coin side, read in the hard money coin surfacial pattern (for example with reference to patent documentation 2, patent documentation 3) of following lateral reflection.
Yet, the reading device of this situation under the hard money coin will be arranged, below transporting the path, the hard money coin also reading device to be arranged, and so will on configuration structure, be restricted and become complicated, thereby cause cost to improve.
(patent documentation 1)
Te Kaiping 06-176235 number bulletin
(patent documentation 2)
Te Kaiping 07-167788
(patent documentation 3)
Te Kaiping 09-288755 number bulletin
Summary of the invention
Therefore, its purpose of the present invention is: provide a kind of dielectric surface reading device, when reading dielectric surface, by the oblique illumination device that can know this dielectric surface marginal portion of irradiation is set, suitably elongate oblique shadow so that obtain image, thus can high precision, clearly read.
The dielectric surface reading device that the present invention relates to, be a kind of to shining above the medium that transports on the face and be transported that is stated from conveyer, read the dielectric surface reading device of the marginal portion above the medium of described illuminated irradiation by reading device, it is characterized in that: have from described reading device read medium that position corresponding oblique upper irradiation transported by described conveyer above and the oblique illumination device of each marginal portion of the periphery of medium, with allow above described oblique illumination device oblique illumination medium and the periphery of medium, and at the horizontal orientation device of the boot media in a lateral direction of transporting.
Here, conveyer is meant can be loaded into medium on the face of transporting and be transported to and reads locational conveying belt.
Described medium be meant be used, have circulation hard money coin, foreign hard money coin and a recreation coin of the peculiar figure of variety classes difference on the outer surface.
Described marginal portion is meant that the surfacial pattern of medium makes back (having) concavo-convex equal difference part slightly, is meant the periphery of medium in addition, for example is the rectangular angle part of summary that has formed circular periphery portion.
Described reading device is meant the surfacial pattern that reads medium and the device of periphery marginal portion, for example can be by constituting by optically read medium edge partial C CD imageing sensor.
Described oblique illumination device is meant to making the shadow of making according to the marginal portion above the medium form the device of long back from oblique upper enforcement irradiation by shining, for example can tilts and constitute the direction of illumination of LED.
Described horizontal orientation device is meant that the medium that utilizes conveyer to make to be transported transports the device that laterally leads, when the transverse guidance medium, while allow above oblique upper irradiation medium and the medium periphery is arranged to transport the shape of guiding into.
For example, if the spigot surface height of horizontal orientation device is set to be lower than the height of medium, so just can allow oblique illumination from oblique upper.
And, be set to be lower than above the described medium in the height at the spigot surface height of horizontal orientation device, the dip plane that formation is passed through the incident light of described oblique illumination device, and the incident boundary angle on the vergence direction on setting binding summit, described dip plane and the one side summit, irradiation opposite above the described medium, if the incident angle of described oblique illumination device is set, make it surpass this incident boundary angle, just can shine the periphery of medium really.
Its result, even above oblique upper irradiation medium, but since from the irradiates light of its vergence direction not because of horizontal orientation device is blocked, institute is so that transport and laterally shine each corner really and whole transporting laterally guaranteed in reading surveyed area.Because this point, so reach the medium periphery above the medium and can clearly read because of having shone really.Shortcoming unclear reading like that appears in the part that therefore can eliminate the view data after reading fully.
In addition, be directed to laterally suitable reading in the zone, so while medium can be transported be directed to the marginal portion of clearly shining dielectric surface on the position that is suitable for reading because the medium that relies on horizontal orientation device to import can be transported.
In addition, according to having the precision that reads that such horizontal orientation device can improve medium, for the size that can correctly read medium does not expand to more than the required width transporting width, do not enlarge in addition and read the low cost of manufacture that the zone just can be sought the miniaturization of reading device and be brought because of miniaturization.
And, owing to behind the marginal portion of clearly having shone the medium periphery, can obtain image, so, even the approximate different types of medium of identification size, but the two detection data that are similar to because of both sides are standard deviations thereby can produce the overlapping such coincidence surveyed area of a part, therefore can clearly distinguish two media and can obtain high-precision recognition performance.
Description of drawings
Fig. 1 is the stereographic map of the major part of expression hard money coin surface reading device.
Fig. 2 is the major part vertical view under the hard money coin shipping situation of expression hard money coin surface reading device.
Fig. 3 is the major part longitudinal diagram under the hard money coin reading state of expression hard money coin surface reading device.
Fig. 4 is the principle key diagram of hard money coin surface reading device.
Fig. 5 is the chart of the test findings example of expression hard money coin surface reading device.
The longitudinal diagram of the major part under Fig. 6 medium reading state that to be expression undertaken by vertical irradiation in the past.
The longitudinal diagram of the major part under Fig. 7 medium reading state that to be expression undertaken by oblique illumination in the past.
The vertical view of the major part under Fig. 8 medium reading state that to be expression undertaken by oblique illumination in the past.
Fig. 9 is the chart that takes place to overlap when representing hard money coin identification in the past under the surveyed area state.
Among the figure: 11-hard money coin surface reading device, 12-conveying belt, 13-transverse guides, 14,15-LED, 16-CCD imageing sensor, 17-dip plane, 18-oblique illumination light, C, Cl-hard money coin, LO-incident boundary light, θ 2-incident boundary angle.
Embodiment
Below, describe with reference to accompanying drawing with regard to one embodiment of the invention.
Accompanying drawing has represented to read the hard money coin surface reading device of hard money coin surfacial pattern, in Fig. 1, this hard money coin surface reading device 11 is by the conveying belt 12 that will transport to horizontal direction behind the hard money coin C top loading, with transverse guides 13 along the both sides delivery hard money coin C of this conveying belt 12, the hard money coin detecting sensor S of the existence of the hard money coin CD that is transported with detection, with the light emitting diode (LED) 14 above the oblique upper irradiation hard money coin C that transports both lateral sides, 15, constitute with the ccd image sensor 16 that the reflected light that reflects is subjected to light above hard money coin C.
Described conveying belt 12 is along carriage direction and the belt pulley P that is provided with face-to-face
1, P
2Between with the rate of tension of regulation the plane belt is set, this plane strap surface is the face that transports of hard money coin, and is linked by not shown driving mechanism on belt pulley therein and to transfer power afterwards, is rotated driving with certain speed when the hard money coin reads.
Dispose transverse guides 13 in the both sides of described conveying belt 12, this transverse guides 13 is, makes along carriage direction and interior to constitute in opposite directions to the dip plane 17 that tilts.
This dip plane 17 as shown in Figures 2 and 3, the belt that is cut into for horizontal direction transports face, from being positioned at the angle of inclination that the oblique illumination light of its LED14 that transports horizontal oblique upper both sides, 15 when oblique below is shone is not blocked.
In addition, setting makes the hard money coin C that is transported detect by hard money coin detecting sensor S described later.Described hard money coin detecting sensor S, for example be that the photoelectric testing sensor that is made of light projector and light-receiving device is configured on the hard money coin detection position, when hard money coin C be contained in conveying belt 12 above when being directed on this hard money coin detection position, detect the existence of hard money coin C according to shading, and with this detection signal interlock after to make each LED14,15 that is under the OFF holding state carry out certain hour ON luminous, oblique illumination light 18 at this moment shines towards reading surveyed area 20.
Described ccd image sensor 16 is set at the top of reading the position, here, the view data that reflects above hard money coin C is subjected to behind the light to read in the marginal portion that surface pattern above the hard money coin and this two aspect of hard money coin peripheral part are represented according to optical detection, and the data that read are to discern Currency Type with the control part that figure does not show.Among the figure, the 19th, the expression cover glass, the 20th, surveyed area is read in expression.
Below, describing with reference to Fig. 4 for the oblique illumination theory structure above the conveying belt.
Shown in Fig. 4 (A), transverse guides 13 is height (thickness) L that are lower than hard money coin C with the spigot surface height L2 of transverse guides 13
1And set.
In this case, work as setting
L
1: the height of hard money coin
L
2: the spigot surface height
T: during the gap of hard money coin and guide plate, with
L when t=0
1＞L
2
L when t＞0
1〉=L
2Represent,
Like this, because possibility when t=0 takes place is arranged, so conditional just becomes L
1＞L
2
Just can allow light inlet according to setting such conditional from the oblique illumination light 18 of oblique upper.
For example, shown in the imaginary line on Fig. 4 (A), as hard money coin C
1To laterally moving to greatest extent and contact back (t=0),, also can allow light inlet from the oblique illumination light 18 of same oblique upper even the irradiation area of oblique illumination light 18 is in the shipping situation of minimum with one-sided transverse guides 13.
But, under the like that extremely thin situation of reading object image hard money coin C, owing to be with transporting abreast above the conveying belt, so be difficult to make the spigot surface height L of transverse guides 13
2Step-down, in case too thin, then the hard money coin probably will be gone up on the transverse guides 13, so just can not get original suitable guide function.
Since this point, shown in Fig. 4 (B), the spigot surface height L of transverse guides 13 inboards
2The height L that sets than hard money coin C
1Low, meanwhile, be to be cut into the dip plane 17 that an incident light is used, and be provided with the summit M that links this inclination 17 in the inboard of transverse guides 13 (transverse guides 13)
1Summit M with irradiation opposite one side above the hard money coin C
2The incident boundary light L of vergence direction
0Incident boundary angle θ
2, surpassing this incident boundary angle θ
2Scope in set the incident angle θ of LED
1
For example, if above the conveying belt in the horizontal direction and from formed incident boundary angle θ between the incident angle from its oblique upper
2Be under 30 ° the situation, so from the incident angle θ of the oblique illumination light 18 of LED
1Can be set at and be 30 ° angle.
In this case
Work as L
1: the height of hard money coin
L
2: the spigot surface height
θ
1: the incident angle of oblique incidence light
θ
2: incident boundary angle
T: during the gap of hard money coin and guide plate, with
When t=0 then: L
1＞L
2
θ
1＞θ
2
When t＞0 then: L
1〉=L
2
θ
1〉=θ
2Expression,
Like this, because possibility when t=0 takes place is arranged, so conditional becomes L
1＞L
2, θ
1＞θ
2
Just the whole width that transports can be in reading surveyed area 20, guaranteed according to setting such conditional, and the circular periphery portion of shining above the hard money coin C can be can read surveyed area 20 in really with its hard money coin reading of this wide scope.
In addition, at this moment shown in the imaginary line of Fig. 4 (B), as hard money coin C
1To laterally moving to greatest extent and contact afterwards (t=0), if the incident boundary light L of oblique illumination light 18 with one-sided transverse guides 13
0Incident boundary angle θ
2Be under 50 ° the situation, so from the incident angle θ of the oblique illumination light 18 of LED
1Can be set at angle greater than 50 °.According to this point, hard money coin C
1Even be under the shipping situation of off-centre (polarisation), also can allow light inlet from the oblique illumination light 18 of oblique upper.
Below, the work of reading of the hard money coin surface reading device 11 that just so constitutes describes.
After hard money coin C is contained on the conveying belt 12, be directed to when reading on the position, detect the hard money coin C that shelters from optical axis light by reading locational hard money coin detecting sensor S.At this moment, after the control part that is not shown by figure according to the detection signal of this sensor S makes the photoelectric yield of hard money coin detecting sensor form OFF, make the LED14,15 of both sides form ON and begin with this OFF interlock and shine.According to this point, the top of hard money coin C just shone fully.
At this moment, even the top LED14 from oblique upper, 15 of hard money coin C shines, yet owing to do not have because of transverse guides 13 is blocked, so can shine the marginal portion of the top and circular outer periphery portion of hard money coin C really from the oblique illumination light 18 of its vergence direction.Because this point can clearly read from being located at the ccd image sensor that reads the top, position, and can eliminate such unclear read of the part of the view data that has read because of the former of transverse guides 13 thereby shortcoming fully.
In addition, while being transported to be directed on the lateral center position that is suitable for reading, the transverse guides 13 of hard money coin C by both sides be transported to next stage.At this moment, utilize this spigot surface height L
2More the top upward also can obtain limiting the effect that hard money coin C is lifted in the dip plane 17 of formation, thereby can realize that stable hard money coin transports.
Just can improve the precision that reads of other hard money coin of Currency Type according to such read functions, need on the width basis of the size that can correctly read the hard money coin, additionally not enlarge and transport width, need not enlarge and read the miniaturization that reading device just can be realized in the zone, and can reduce cost thus.
Especially, owing to behind the edge part that clearly shines hard money coin periphery, can obtain image, even so when other Currency Type hard money coin that the identification size is similar to, so do not produce the overlapping such coincidence surveyed area of part appearance because two detection data are standard deviations, therefore can distinguish various hard money coin clearly and can obtain high-precision recognition performance.
Fig. 5 is the test findings that hard money coin surface reading device 11 has been used in expression, discern minor diameter hard money coin 51 and Φ 25 major diameter hard money coin 52 these two hard money coin 51 of the Φ 20 that varies in size at this hard money coin surface reading device 11 of use, under 52 the situation, after the view data of two hard money coin compared, its two hard money coin 51,52 separately the standard deviation of view data to compare with normal value be that the standard deviation of this smaller scope of usefulness ± 2mm solves.
Therefore, because the view data in the standard deviation scope of two hard money coin can be not overlapping, and can not produce the coincidence surveyed area that can not discern, can improve accuracy of identification so be counted as really.
As mentioned above, even above oblique upper irradiation hard money coin, but since from the irradiates light of its vergence direction not because of transverse guides is blocked, so, really can shine each corner by transporting laterally, so just can make and transport horizontal integral body and guarantee that it becomes and read surveyed area.Because this point just can positively shine and clearly read above the hard money coin and hard money coin periphery.Especially, from the test findings example, also can learn, owing to behind the marginal portion of clearly shining hard money coin periphery, can obtain image, so even the approximate hard money coin of size, because of can not producing the coincidence surveyed area, thereby can clearly distinguish and can obtain high-precision recognition performance.
In the present invention and a described example structure corresponding, the hard money coin surface reading device 11 that dielectric surface reading device and the embodiment that this invention relates to relates to is corresponding, below be equally: conveyer is corresponding with conveying belt 12, medium is corresponding with hard money coin C, C1, reading device is corresponding with ccd image sensor 16, the oblique illumination device with about LED14,15 corresponding, horizontal (to) guide piece and transverse guides 13 be corresponding etc., can both use according to the technological thought of representing in the claim of the present invention, and not only be defined in the structure of a described embodiment.
According to the present invention, because the whole width that transports that can shine really that the top and periphery of medium also can make medium guarantees that it becomes and read surveyed area with reading, so can realize higher the reading of reliability.
Claims (6)
1, a kind of dielectric surface reading device, be a kind of to shining above the medium that transports on the face and be transported that is stated from conveyer, read the dielectric surface reading device of the marginal portion above the medium of described illuminated irradiation by reading device, it is characterized in that: have from described reading device read medium that position corresponding oblique upper irradiation transported by described conveyer above and the oblique illumination device of each marginal portion of the periphery of medium, with allow above described oblique illumination device oblique illumination medium and the periphery of medium, and at the horizontal orientation device of the boot media in a lateral direction of transporting.
2, dielectric surface reading device according to claim 1 is characterized in that: be the height setting above the guiding of described horizontal orientation device the height that is lower than described medium.
3, dielectric surface reading device according to claim 1 and 2, it is characterized in that: described horizontal orientation device is, be set to be lower than height above the described medium towards the directed side height towards side medium of described laterally steering parts, and form dip plane on the directed side of medium one side for the incident light that shines by described oblique illumination device at described guiding parts, setting is from the incident boundary angle of the vergence direction that links summit, described dip plane and the irradiation opposite side summit above the described medium, and the incident angle of setting described oblique illumination device makes it surpass this incident boundary angle.
4, a kind of dielectric surface reading device, be a kind of to shining above the medium that transports on the face and be transported that is stated from conveyer, read the dielectric surface reading device of the marginal portion above the medium of described illuminated irradiation by reading device, it is characterized in that: have irradiates light is shone the light source that is reached medium periphery mint-mark figure above the medium of described conveyer from the corresponding oblique upper in position that reads with described reading device, transport guiding parts on the lateral ends with being arranged on of the periphery of the top and medium of allowing described light source incline irradiation medium along this medium, described guiding parts is set, makes its irradiates light that does not block from described light source also can make irradiates light shine top the mint-mark figure or the shape of described medium.
5, dielectric surface reading device according to claim 4 is characterized in that: the height towards the directed side of medium one side of described guiding parts is set to be lower than the height of described medium.
6, according to claim 4 or 5 described dielectric surface reading devices, it is characterized in that: described laterally steering parts, height above the guiding parts is set to be lower than the height above the described medium, and the dip plane that formation is passed through the incident light of described light source, set the incident boundary angle on the vergence direction that links summit, described dip plane and the irradiation opposite side summit above the described medium, the incident angle of setting described light source makes it be no more than this incident boundary line angle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001380974 | 2001-12-14 | ||
| JP2001380974 | 2001-12-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1426026A true CN1426026A (en) | 2003-06-25 |
| CN1189843C CN1189843C (en) | 2005-02-16 |
Family
ID=19187277
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02292704 Expired - Lifetime CN2593274Y (en) | 2001-12-14 | 2002-12-13 | Medium surface reader |
| CNB021558825A Expired - Fee Related CN1189843C (en) | 2001-12-14 | 2002-12-13 | Medium surface reader |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02292704 Expired - Lifetime CN2593274Y (en) | 2001-12-14 | 2002-12-13 | Medium surface reader |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN2593274Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104854425A (en) * | 2013-03-15 | 2015-08-19 | 诚研科技股份有限公司 | Methods for detecting an edge of a transparent material and detecting devices and systems for same |
| CN109430675A (en) * | 2017-10-13 | 2019-03-08 | 河北华氏纪元高频设备有限公司 | A kind of high frequency thawing apparatus and high frequency defreezing method |
| CN110956735A (en) * | 2019-07-25 | 2020-04-03 | 日本金钱机械株式会社 | Coin discriminating unit |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102184588B (en) * | 2011-06-03 | 2013-05-01 | 江苏科思机电工程有限公司 | Reflective amplified type coin detection device |
| JP7139722B2 (en) * | 2018-06-27 | 2022-09-21 | オムロン株式会社 | Paper sheet storage device, Paper sheet processing device |
-
2002
- 2002-12-13 CN CN 02292704 patent/CN2593274Y/en not_active Expired - Lifetime
- 2002-12-13 CN CNB021558825A patent/CN1189843C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104854425A (en) * | 2013-03-15 | 2015-08-19 | 诚研科技股份有限公司 | Methods for detecting an edge of a transparent material and detecting devices and systems for same |
| CN109430675A (en) * | 2017-10-13 | 2019-03-08 | 河北华氏纪元高频设备有限公司 | A kind of high frequency thawing apparatus and high frequency defreezing method |
| CN109430675B (en) * | 2017-10-13 | 2023-11-28 | 河北华氏纪元高频设备有限公司 | High-frequency thawing device and high-frequency thawing method |
| CN110956735A (en) * | 2019-07-25 | 2020-04-03 | 日本金钱机械株式会社 | Coin discriminating unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1189843C (en) | 2005-02-16 |
| CN2593274Y (en) | 2003-12-17 |
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Granted publication date: 20050216 Termination date: 20100113 |