CN101314443B - Paper feeding apparatus and method for detecting multi-paper feed - Google Patents
Paper feeding apparatus and method for detecting multi-paper feed Download PDFInfo
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- CN101314443B CN101314443B CN2007100415160A CN200710041516A CN101314443B CN 101314443 B CN101314443 B CN 101314443B CN 2007100415160 A CN2007100415160 A CN 2007100415160A CN 200710041516 A CN200710041516 A CN 200710041516A CN 101314443 B CN101314443 B CN 101314443B
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Abstract
The invention discloses a paper feeder and a method for detecting a plurality of pieces of fed paper for the paper feeder. The paper feeder comprises a paper feeding channel, a paper feeding mechanism and a paper detecting device, wherein, the paper detecting device is arranged in the paper feeding channel, and comprises a first transmitter, a first receiver, a second transmitter and a second receiver. A signal transmitted by the first transmitter travels along a first transmission path, and is received by the first receiver; a signal transmitted by the second transmitter travels along a second transmission path, and is received by the second receiver; and the second transmission path is not parallel to the first transmission path. The paper feeder further comprises a determination unit which is used for determining whether a plurality of pieces of paper are fed or not according to a signal variation of the first signal received by the first receiver and a signal variation of the second signal received by the second receiver.
Description
Technical field
The invention relates to a kind of paper feeder, but and particularly about a kind of paper feeder and method for detecting thereof of detecting multi-paper feed.
Background technology
Electronic products such as scanner now, duplicator or multifunctional paper feeding machine, major part all are provided with paper feeder will put in order in the folded automatic feed-in electronics package of pending file, with functions such as further execution scanning, photomechanical printing or printings.Technical, though paper feeder can will be put in order folded file or paper feed-in electronics package one by one, in the paper feed process, still can't avoid the situation of multi-paper feed.If when the whole folded file of scanning, two (or more) files of feed-in simultaneously, the file content that then can holiday will scan causes scanning information imperfect.If many files of feed-in simultaneously take place when xeroxing, then be very easy to the problem of paperboard takes place and make the electronics package interrupt operation.
At present, when detecting multi-paper feed passes through the paper feed passage at file, be to remove to touch file with haptic element or sensing arm, measure the change amount of its thickness again.After thickness change amount surpasses preset range, promptly judge the situation that multi-paper feed takes place.Yet not only the sensing degree is low, sensed speed is slow for this detecting mode, and causes the paperboard problem easily.
Summary of the invention
But the present invention relates to a kind of paper feeder and method for detecting thereof of detecting multi-paper feed, installing many groups projector and receptor in paper feeder, and make wherein at least one group projector and receptor inclination ornaments, to improve the detecting effect.
The present invention proposes a kind of paper feeder, and this device comprises paper feed passage, paper feed mechanism and paper sensing device.The paper feed passage is with so that paper moves along transfer path, and paper feed mechanism is then in order to transmit paper by the paper feed passage.Paper sensing device comprises first projector, first receptor, second projector, second receptor and judging unit.First projector is in order to launch first signal, and first signal is advanced along first transmission path, and is received by first receptor.Second projector is in order to the emission secondary signal, and secondary signal is to advance along second transmission path that is not parallel to first transmission path, is received by second receptor again.Judging unit is electrically connected first receptor and second receptor, judges whether to take place multi-paper feed in order to the difference between the change amount signal of the change amount signal of first signal that received according to first receptor and the secondary signal that second receptor is received.
The present invention reintroduces a kind of method of detecting multi-paper feed, the method comprises: at first, use first projector to launch first signal, first signal is advanced along first transmission path, and using second projector emission secondary signal, secondary signal is advanced along second transmission path that is not parallel to first transmission path; Then, use first receptor to receive first signal, and use second receptor to receive secondary signal; Then, judge whether to take place multi-paper feed according to the difference between the change amount signal of the change amount signal of first signal and secondary signal.
For foregoing of the present invention can be become apparent, preferred embodiment cited below particularly, and in conjunction with the accompanying drawings, be described in detail below:
Description of drawings
Fig. 1 shows the scheme drawing according to the paper feeder of preferred embodiment of the present invention.
The first pass figure of the paper feeder detecting multi-paper feed method of Fig. 2 displayed map 1.
The scheme drawing of the paper feeder of Fig. 3 A～3B displayed map 1 when detecting.
Second diagram of circuit of the paper feeder detecting multi-paper feed method of Fig. 4 displayed map 1.
The specific embodiment
Present embodiment proposes the method for a kind of paper feeder and detecting multi-paper feed thereof, and paper feeder uses the assembly in its device, can detect the problem whether paper feeder takes place the paper more than two is sent into simultaneously in the paper feed process.
Please refer to Fig. 1, it shows the scheme drawing according to the paper feeder of preferred embodiment of the present invention.As shown in Figure 1, paper feeder 1 comprises paper feed mechanism (not shown), paper feed path 10 and paper sensing device.The paper feed path 10 is with so that paper moves along transfer path, and paper feed mechanism is then in order to transmit paper by the paper feed path 10.Paper sensing device comprises first projector 12, first receptor 14, second projector 16, second receptor 18 and control unit 20.First projector 12 and first receptor 14 are arranged on two offsides of paper feed path 10, and wherein the signal of first projector 12 is to advance along the first transmission path P1, and are received by first receptor 14.Second projector 16 and second receptor 18 are arranged on two offsides in addition of paper feed path 10, and the signal of second projector 16 then is to advance along the second transmission path P2, are received by second receptor 18 again.Wherein, the second transmission path P2 is not parallel to the first transmission path P1.
Preferably, when ornaments projector and receptor, be to make the transfer path of the transmission path of projector and receptor perpendicular to paper.In the present embodiment, be to make the transfer path of the first transmission path P1 of first projector 12 and first receptor 14 perpendicular to paper 100,200.And second projector 16 and second receptor 18 are arranged on the paper feed path 10 obliquely, make between the second transmission path P2 and the first transmission path P1 and accompany angle θ.
The paper feed mechanism of paper feeder 1 is sent into paper in the paper feed path 10 one by one.Yet, as shown in Figure 1, when generation paper 100 is admitted to the paper feed path 10 simultaneously with paper 200,, can detect the multi-paper feed situation of paper feeder 1 by the running of first projector 12, first receptor 14, second projector 16, second receptor 18 and control unit 20.Two kinds of different method for detecting of the following drawings casehistory.
Please earlier with reference to Fig. 2, the first pass figure of the paper feeder detecting multi-paper feed method of its displayed map 1.And please refer to Fig. 3 A～3B, the scheme drawing of the paper feeder of its displayed map 1 when detecting.As shown in Figure 2, the method of paper feeder 1 detecting multi-paper feed comprises step 21～23: at first, make first projector, 12 emissions, first signal, and make second projector, 16 emission secondary signals, wherein secondary signal is advanced along the second transmission path P2 that is not parallel to the first transmission path P1; Then, receive the signal of first projector 12 and second projector 16 respectively by first receptor 14 and second receptor 18, and transmit signals to control unit 20; Then, by control unit 20 according to the change amount signal of first signal and the change amount signal of secondary signal, to judge whether to take place multi-paper feed.
In step 21,22, when beginning that paper sent into paper feeder 1, control unit 20 in-to-in driving circuit (not shown)s can be ordered about first projector 12 and second projector, 16 transmitting frequencies ultrasonic signal identical or inequality
(first signal and secondary signal).In the present embodiment, make the frequency of first signal identical with the frequency of secondary signal.As shown in Figure 3A, first signal of being launched by first projector 12 only penetrates paper 100, and the secondary signal of second projector, 16 emissions penetrates paper 100 and 200.As previously mentioned, secondary signal can change phase place because of the paper interface of paper 100 and 200, though thereby first signal identical with the frequency of secondary signal, yet variant at the received signal of first receptor and second receptor.Because of the inclined design of second projector 16 and second receptor 18, make the otherness of signal more obvious again.
In addition, if the signal that first projector 12 and second projector 16 are launched equally all penetrates paper 100 and 200, also the gap with penetrating material is relevant owing to supersonic penetration coefficient, can be judged by the penetration coefficient of signal.Shown in Fig. 3 B, a. g. size between the paper 100 and 200 is D1.Because the first transmission path P1 is perpendicular to the transfer path of paper, the ultrasonic penetration coefficient of first projector 12 is relevant with D1, and the ultrasonic penetration coefficient of second projector 16 is then relevant with D2 (D2=D1/cos θ).Thus, the 3rd signal and the 4th signal that control unit 20 is received by first receptor 14 and second receptor 18 certainly will be similar to absorbed effect owing to ultrasonic, compare with first signal and secondary signal to have decrement δ 1 and δ 2.The ornaments because second projector 16 and second receptor 18 tilt make decrement δ 1 and δ 2 produce otherness.
Can cause the existence of a. g. between paper under the situation of multi-paper feed, make ultrasonic produce decay.And with second projector 16 and second receptor 18 ornaments that tilt, the decrement δ 1 that makes first signal and the decrement δ 2 of secondary signal produce othernesses, control unit 20 thereby effective detecting multi-paper feed.
Though aforesaid method is to detect with the identical ultrasonic signal of transmitting frequency, yet when operating actually, also can detect by the different ultrasonic signal of transmitting frequency.And because the high more ultrasonic signal of frequency is run into same a piece of paper of same thickness, its degree of damping is high more.In other words, the ultrasonic that frequency is high more is sharp more for thick or thin paper, thereby the acuity of the frequency that can adjust the ultrasonic signal when improving detecting.
Please refer to Fig. 4, second diagram of circuit of the paper feeder detecting multi-paper feed method of its displayed map 1.As shown in Figure 4, the other method of paper feeder 1 detecting multi-paper feed comprises step 41～43: at first, make first projector 12 launch first signal along the first transmission path P1, and, transmit signals to control unit 20 again by first receptor, 14 received signals in the very first time; Then, make second projector 16 launch secondary signal along the second transmission path P2 that is not parallel to the first transmission path P1, and, transmit signals to control unit 20 again by second receptor, 18 received signals in second time; Then, by control unit 20 according to the change amount signal of first signal and the change amount signal of secondary signal, to judge whether to take place multi-paper feed.
Be with the method difference of step 21～23, first projector 12 and second projector 16 are at different time emission ultrasonic signal, but it measures the method and the indifference part of the change amount signal (as phase change and decrement) of first signal and secondary signal, but thereby also actv. detecting whether multi-paper feed takes place.
Though present embodiment only explains with two groups of projectors and receptor, in fact also can use two groups of above projector and receptors to detect, needing only at least one group of projector and receptor is to be obliquely installed.And the weight of the paper on the paper feed path 10 is that 50gsm (restrains every sq m, gram per square meter) to 120gsm, then the s-f that sent of first projector 12 and second projector 16 is greater than 40 kilo hertzs, or preferably about 200 kilo hertz to 300 kilo hertzs, all well and good performance has just been arranged when detecting.
Paper feeder 1 can be applicable in the electronics package of general scanner, duplicator or multifunctional paper feeding machine etc., in order to will scan contribution or blank autotype paper is sent in the electronics package one by one.If in paper feeder 1, send plurality of sheets of paper simultaneously in electronics package, the problem of paperboard then takes place because paper sheet thickness is excessive easily, the running of electronics package is interrupted.Installing has the paper feeder 1 of detecting function in electronics package, then can effectively avoid aforesaid problem.The processing mode of casehistory after detecting multi-paper feed:
(1) electronics package can decommission, directly export overlapping paper to paper output box and demonstrate the information of multi-paper feed on the control panel of electronics package or screen.
(2) electronics package (for example scanner) can continue running, but only can scan the superiors, close image capture district that
File behind to be scanned the finishing, equally can demonstrate the information of multi-paper feed on control panel or screen.
The paper feeder that the above embodiment of the present invention is disclosed and the method for detecting multi-paper feed thereof, ultrasonic projector and the receptor of installing more than two groups in paper feeder, wherein the putting position of at least one group of projector and receptor is a bevelled with respect to the paper of paper in the transmission.These ultrasonic projectors can transmitting frequency signal identical or inequality, and between can be at the same time or transmit under the different time.Whether ultrasonic projector that cooperation is obliquely installed and receptor remove to detect paper overlapping, and the detecting effect is improved.
In sum, though the present invention with the preferred embodiment disclosure as above, yet it is not in order to limit the present invention.The technical personnel of the technical field of the invention without departing from the spirit and scope of the present invention, should be done various changes and modification.Therefore, protection scope of the present invention is as the criterion with the scope that claims were defined.
The primary clustering symbol description
1: paper feeder
10: the paper feed passage
12: the first transmitters
14: the first receivers
16: the second projectors
18: the second receptors
20: control unit
100,200: paper
P1: first transmission path
P2: second transmission path
Claims (16)
1. a paper feeder is characterized in that, comprising:
The paper feed passage, with so that paper move along transfer path;
Paper feed mechanism is in order to transmit described paper by described paper feed passage;
Paper sensing device is arranged in the described paper feed passage, and described paper sensing device comprises:
First projector, in order to launch first signal, described first signal is advanced along first transmission path;
First receptor is in order to receive described first signal;
Second projector, in order to the emission secondary signal, described secondary signal is advanced along second transmission path that is not parallel to described first transmission path;
Second receptor is in order to receive described secondary signal; And
Judging unit, be electrically connected described first receptor and described second receptor, judge whether to take place multi-paper feed in order to the difference between the change amount signal of the change amount signal of described first signal that received according to described first receptor and the described secondary signal that described second receptor is received.
2. paper feeder as claimed in claim 1 is characterized in that, described first transmission path is perpendicular to described transfer path.
3. paper feeder as claimed in claim 1 is characterized in that, described first projector and described second projector at the same time between or different time launch described first signal and described secondary signal respectively.
4. paper feeder as claimed in claim 1 is characterized in that, described first projector is identical or inequality with the s-f of described second projector emission.
5. paper feeder as claimed in claim 1 is characterized in that, when the weight of paper is 50g/m
2To 120g/m
2, the s-f of a projector emission in described at least first projector and described second projector is greater than 40 kilo hertzs.
6. paper feeder as claimed in claim 5 is characterized in that, s-f circle of a projector emission in described at least first projector and described second projector is between 200 kilo hertz to 300 kilo hertzs.
7. paper feeder as claimed in claim 1 is characterized in that, described first projector and described second projector are two ultrasonic projectors, and described first receptor and described second receptor are two ultrasonic receptors.
8. paper feeder as claimed in claim 1, it is characterized in that, described first projector and described first receptor, and described second projector and described second receptor, one of them group projector and receptor are separately positioned on the both sides of described paper feed passage.
9. the method for a detecting multi-paper feed is characterized in that, comprising:
Use first projector to launch first signal, described first signal is advanced along first transmission path;
Use second projector emission secondary signal, described secondary signal is advanced along second transmission path that is not parallel to described first transmission path;
Use first receptor to receive described first signal;
Use second receptor to receive described secondary signal; And
Judge whether to take place multi-paper feed according to the difference between the change amount signal of the change amount signal of described first signal and described secondary signal.
10. method as claimed in claim 9 is characterized in that, described change amount signal is the decrement of signal amplitude.
11. method as claimed in claim 9 is characterized in that, described change amount signal is the side-play amount of signal phase.
12. method as claimed in claim 9 is characterized in that, described first projector and described second projector at the same time between or different time launch described first signal and described secondary signal respectively.
13. method as claimed in claim 9 is characterized in that, described first projector is identical or inequality with the s-f of described second projector emission.
14. method as claimed in claim 9 is characterized in that, when the weight of paper is 50g/m
2To 120g/m
2, the s-f of a projector emission in described at least first projector and described second projector is greater than 40 kilo hertzs.
15. method as claimed in claim 14 is characterized in that, s-f circle of a projector emission in described at least first projector and described second projector is between 200 kilo hertz to 300 kilo hertzs.
16. method as claimed in claim 9 is characterized in that, described first projector and described second projector are two ultrasonic projectors, and described first receptor and described second receptor are two ultrasonic receptors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100415160A CN101314443B (en) | 2007-05-31 | 2007-05-31 | Paper feeding apparatus and method for detecting multi-paper feed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100415160A CN101314443B (en) | 2007-05-31 | 2007-05-31 | Paper feeding apparatus and method for detecting multi-paper feed |
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| Publication Number | Publication Date |
|---|---|
| CN101314443A CN101314443A (en) | 2008-12-03 |
| CN101314443B true CN101314443B (en) | 2010-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100415160A Active CN101314443B (en) | 2007-05-31 | 2007-05-31 | Paper feeding apparatus and method for detecting multi-paper feed |
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| CN (1) | CN101314443B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013173584A (en) * | 2012-02-24 | 2013-09-05 | Brother Industries Ltd | Sheet conveying apparatus |
| CN109696140A (en) * | 2017-10-23 | 2019-04-30 | 崴强科技股份有限公司 | Paper warpage detection device and its detection method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000025988A (en) * | 1998-07-14 | 2000-01-25 | Matsushita Electric Ind Co Ltd | Double feed detection method for sheet material using ultrasonic wave |
| CN1517289A (en) * | 2003-01-27 | 2004-08-04 | 伊斯曼柯达公司 | Device for detecting multi-file in file delivering |
| CN1626421A (en) * | 2003-12-04 | 2005-06-15 | 尼司卡股份有限公司 | Thin sheet resending detecting method its feeder and image reading device |
-
2007
- 2007-05-31 CN CN2007100415160A patent/CN101314443B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000025988A (en) * | 1998-07-14 | 2000-01-25 | Matsushita Electric Ind Co Ltd | Double feed detection method for sheet material using ultrasonic wave |
| CN1517289A (en) * | 2003-01-27 | 2004-08-04 | 伊斯曼柯达公司 | Device for detecting multi-file in file delivering |
| CN1626421A (en) * | 2003-12-04 | 2005-06-15 | 尼司卡股份有限公司 | Thin sheet resending detecting method its feeder and image reading device |
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| CN101314443A (en) | 2008-12-03 |
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