CN2401937Y - Image scanner with dc motor - Google Patents
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- CN2401937Y CN2401937Y CN 99248889 CN99248889U CN2401937Y CN 2401937 Y CN2401937 Y CN 2401937Y CN 99248889 CN99248889 CN 99248889 CN 99248889 U CN99248889 U CN 99248889U CN 2401937 Y CN2401937 Y CN 2401937Y
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Abstract
The utility model relates to an image scanning device with a direct current motor. The utility model is used for scanning a scanned object. The image scanning device comprises an optical pattern assembly and a direct current motor, wherein, the optical pattern assembly is used for projecting an initial optical signal to the scanned object and receiving a scanned object optical signal which is generated by the scanned object response to the initial optical signal; the direct current motor is used for generating a relative displacement between the scanned object and the optical pattern assembly so that the scanned object can carry out the operation of scanning the scanned object.
Description
The relevant a kind of image-scanning device of the utility model, especially refer to a kind of by direct current generator make scanned and scanning element between produce relative displacement, and the image-scanning device with direct current generator that can improve scanning quality, shorten sweep time and reduce production costs.
At present the researchist of general pattern scanister is when the work of the exploitation that goes in for the study,, all be devoted to how to improve image-scanning device the scanning effect, shorten sweep time and reduce production costs and effort.Yet, take a broad view of the image-scanning device that is present at present on the market, it can divide into two kinds of hand and step motor drive modes haply, and can be divided into platform-type (flat bed), paper feed type (sheet feed), self-propelled and pellet type (photo drive by the step motor drive mode, PHD) wait several, existing details are as follows respectively:
One, by the hand traction mode:
Advantage: via the visual length that will scan of can determining;
Shortcoming: owing to be to operate image analyzer in artificial mode, therefore, speed is wayward during easily because of shake or pulling, and cause go offline (spurring too fast), thereby cause the scanner distorsion phenomenon to produce, for example, when scanning a positive circle diagram shape, may become the scanning result of vertical flat ellipse; Yet, if avoid lost line guaranteeing scanning quality, and spurred in the scanning process when slow, will waste the too much time.
Two, by stepper motor driven mode:
Advantage: utilize the control of phase change, can accurately assign the step number that desire is rotated, can avoid the problem that goes offline, technical simpler, ripe, be present mainstream technology so use till today;
Shortcoming: because the cause of " stepping ", so when rotating walking is interrupted progressive mode, therefore, each step is when starting, to locate bad for some time, especially more serious when the vertical resolution of height (see also Fig. 1, and be described as follows):, then will become more little apart from △ Xi between each bar sweep trace if vertical resolution is high more; At this moment, the tram as if represent i bar sweep trace with Xi then makes X (t)-Xi=Xi
(error)(t); Wherein, the t in this formula is meant t (i 1)～ts (i); Therefore, when vertical resolution is high more, will become littler apart from △ Xi between per two sweep traces, and locate bad phenomenon: from [Xi
(error)(t)/and △ Xi] in the formula, can find more to be tending towards obvious and locate bad phenomenon because of △ Xi diminishes.
So, for eliminating this phenomenon, normally with the long period as exchanging cost for; And the time of waste is too much, and the brightness of light source will change and influence the scan image quality; Moreover when stepper motor started in per step, inflow current was bigger, and the noise that vibrations caused when starting or stoping disturbs and noise, more can not be ignored.
And by consulting in the image-scanning device that the tradition shown in Fig. 1 has stepper motor, position-the time chart of this stepper motor, can further understand the defective of prior art, therein: transverse axis express time among the figure, ti represents the moment when scanning i bar line, ts (i) expression arrives the motor stable state moment that can scan i bar line, and the longitudinal axis is represented position (and i represents the position when scanning i bar line).
By can knowing among the figure, the time when carrying out scanning motion only be: ts (i)～t (i) adds ts (i+1)～t (i+1), adding ts (i+n)～t (i+n), is t (i-1)～ts (i) and make tend towards stability stand-by period of position of stepper motor, adds t (i)～ts (i+1), add t (i+n-1)～ts (i+n), at this moment, can't carry out scanning motion because of the line location is bad, therefore, need the too much stand-by period of waste.
Illustrate, the vertical resolution of supposing image-scanning device is 400dpi, and desire to scan the scanned of a 10inch, also promptly be equivalent to scan 400 * 10=4000 bar sweep trace, suppose that stand-by period t (i-1)～ts (i) is 18ms, and ts sweep time (i)～t (i) is 2ms, and only be 2ms * 3999 8 seconds then real required sweep time; But the spent stand-by period is 18ms * 3999 72 seconds, and both compare, and conventional art is very wasted the too much time undeservedly, and too prolongs sweep time.
Fundamental purpose of the present utility model provides a kind of image-scanning device with direct current generator that improves scanning quality.
Another purpose of the present utility model provides a kind of image-scanning device with direct current generator that shortens sweep time.
A purpose more of the present utility model provides a kind of image-scanning device with direct current generator that reduces noise, low vibrations.
Another purpose of the present utility model provides a kind of image-scanning device with direct current generator that reduces production costs.
The utility model is achieved in that a kind of image-scanning device with direct current generator, wherein this image-scanning device can comprise: an optics module, it is scanned to this that it is used to throw an initial optical signal, and receive the scanned optical signalling that this initial optical signal of this scanned response is produced; And a direct current motor, it is used to make this scannedly to produce a relative displacement with this optics module, makes this optics module scan this scanned action.
According to above-mentioned conception, wherein this image-scanning device can be a platform-type image-scanning device or is a paper feed type image-scanning device or is a self-propelled image-scanning device or is a pellet type image-scanning device, can also be a keyboard-type image-scanning device.
According to above-mentioned conception, wherein this scanned to can be a transmission-type scanned, or be one reflective scanned.
According to above-mentioned conception, wherein this optics module can comprise: a light source, and it is used to provide this initial optical signal, and this initial optical signal is projected to that this is scanned, so that produce this scanned optical signalling; One reflector group, it is used to change the optical path of scanned optical signalling; One lens combination, it is used for receiving this scanned optical signalling, and changes the optical path of this scanned optical signalling; And a sensing element, it is used for receiving this scanned optical signalling, is converted to an electric signal and exports so that this is scanned optical signalling; Wherein this sensing element can be a charge coupled cell (CCD).
According to above-mentioned conception, wherein this optics module can be a contact-type image sensor CIS (Contactimage Sensor).
According to above-mentioned conception, wherein this image-scanning device more comprises a gear train, is connected in this direct current generator.
According to above-mentioned conception, wherein this gear train can be used for transmission this scanned, makes this scanned and this optics module produce a relative displacement.
According to above-mentioned conception, wherein this gear train can be used for this optics module of transmission, makes this scannedly produce a relative displacement with this optics module.
According to above-mentioned conception, wherein this scannedly can be considered as being distinguished into N bar sweep trace, to carry out this scanning motion, and wherein the length of each the bar sweep trace in this scanned N bar sweep trace can be L ' (inch), and the vertical resolution of this image-scanning device is K dpi, then the length L of each bar sweep trace '=1/K (inch).
According to above-mentioned conception, wherein may be defined as t line the sweep time of each the bar sweep trace in this N bar sweep trace of scanning, and wherein should sweep time t line can comprise: correspond to the scanning integrating time t int that actual scanning is chosen length, add that corresponding to length of scanning line L ' chooses the length tolerable error time t torr of difference between the two with actual scanning.
According to above-mentioned conception, wherein during this tolerable error time t torr in, can utilize the time to carry out the Flame Image Process action, or carry out the action of test pattern scanister, or other required processing actions.
According to above-mentioned conception, wherein the mean speed of this direct current generator when carrying out scanning motion may be defined as Vi (t), average relative between this moment this scanned and this optics module can be vi (t), and wherein can be by t line sweep time that adjusts this scanning integrating time t int and each bar sweep trace, the sweep length of desire scanning to adapt to, and then shorten sweep time; Wherein this length of scanning line L ' then can be similar to t line sweep time that average relative vi (t) between scanned and the optics module is multiplied by each bar sweep trace; Because K=1/L '=1/[vi (t) tline], therefore, can be by the mean speed Vi (t) that adjusts this direct current generator, or be connected in the gearing (as gear set) of this direct current generator, and then adjust average relative vi (t) between this scanned and this optics module, and t line sweep time that adjusts this each bar sweep trace, to satisfy required vertical resolution K; And, more can obtain satisfied sweep velocity via suitable adjustment vi (t) and t line.
According to above-mentioned conception, wherein by adjusting this scanning integrating time t int, the sweep length of desire scanning to adapt to, and then the mode that shortens sweep time can be applicable to an image-scanning device with stepper motor, perhaps in the hand image-scanning device.
According to above-mentioned conception, wherein can know by being arranged on the detection signal that a pick-up unit produced on this image-scanning device in the sweep length of carrying out this scanning motion.
According to above-mentioned conception, wherein this pick-up unit can be and is used for this scanned roller of transmission, and by the rotation number of turns of this roller, and can know this sweep length.
According to above-mentioned conception, wherein can be by the scanning zero-time to and the scanning termination time tf of microcomputer PC decision image-scanning device, and be t line the sweep time of each bar sweep trace, and equal [(tf-to)/t line] * L ' via sweep length, knows sweep length and calculate.
According to above-mentioned conception, wherein can calculate and assign t line sweep time that scans each bar sweep trace for N time altogether, and N equals sweep length and be multiplied by vertical resolution, and push away to such an extent that sweep length equals N divided by vertical resolution by microcomputer PC.
According to above-mentioned conception, wherein the period of operation of this direct current generator can be divided into initial phase (T1), normal epoch (T2) and stop the phase in advance (T3) three stages.
According to above-mentioned conception, wherein can set up numerical tabular via experiment method, summarize as the direct current generator running speed V that arrives normal epoch (T2)
T2The time, this (T1) interior direct current generator of initial phase drives and the distance of walking, and be placed on the later position of the distance of being walked during this initial phase (T1) scanned, and assign in advance the signal that stops the phase (T3) in due course, can obtain correct scan image.
According to above-mentioned conception, wherein can set up numerical tabular via experiment method, summarize as the direct current generator running speed V that arrives normal epoch (T2)
T2The time, this initial phase (T1) accelerates to speed V by speed zero
T2The time of Shi Suoxu or distance, and this stops the phase (T3) in advance by speed V
T2Required time or distance when being decelerated to speed zero so just can be informed in after the end of scan, should delete the scan image data of some length, to obtain correct scan image result.
According to above-mentioned conception, wherein can set up numerical tabular via experiment method, summarize in initial phase (T1) and stop the phase (T3) in advance in the stage, when this time point respectively, the running speed of this direct current generator, and distinguish t line sweep time of corresponding each bar line of scanning, then this image-scanning device all can obtain correct scan image data in initial phase (T1), normal epoch (T2) or when stopping the phase (T3) in advance.
Provide image-scanning device by above-mentioned designing institute, an image-scanning device with direct current generator that improves scanning quality, shortens sweep time, reduces noise and reduce production costs can be provided.
Below in conjunction with accompanying drawing and preferred embodiment, describe structure of the present utility model, feature and effect in detail:
Fig. 1 is one time of the position graph of a relation of the stepper motor in traditional image-scanning device with stepper motor.
Fig. 2 is one time of the position graph of a relation of direct current generator in the utility model preferred embodiment.
Fig. 3 is the scanning theory synoptic diagram in the utility model preferred embodiment.
Fig. 4, Fig. 5 are respectively the circuit diagram that is used to supply power to direct current generator in the utility model preferred embodiment.
Fig. 6, Fig. 7 are respectively the scanning integrating time timing diagram of sweep length that adaptation in the utility model preferred embodiment is desired.
At first, consult Fig. 2, it is one time of the position graph of a relation of direct current generator in the utility model preferred embodiment, and transverse axis express time among the figure (and ti represents the moment when scanning i bar line), the longitudinal axis are represented position (and i represents the position when scanning i bar line); Wherein, the direct current generator period of operation can be divided into initial phase (T1), normal epoch (T2) and stop the phase in advance (T3) three stages, when running is in normal epoch (T2), can be used for for scanning a scanned action, and wherein, the initial phase (T1) reaches and stops the phase in advance in (T3) twice in stage, though because of the slow problem that has non-linear friction and torque of speed, be considered as insignificant under comparing with the normal scan time (T2) this blink.
See also Fig. 3 again, it is the scanning theory synoptic diagram in the utility model preferred embodiment, comprise one scanned 31 in the drawings, one lens combination, 32, one charge coupled cells 33, and this comprises article one line i, a second line i+1, one the 3rd line i+2 of desire scanning on scanned 31, and when each bar line of scanning, w is a sweep length, and L ' is a sweep length, and L then chooses length for actual scanning.
For adapting to the length that image-scanning device scanned, then indicated clock figure on these scanned 31 right sides, wherein, clock Timl is whole sweep times, each the clock period t line that is comprised then is the time of each bar line of scanning, and it corresponds to sweep length L '; Clock Tim2 then was illustrated in whole sweep times, comprised scanning integrating time t int (correspond to actual scanning and choose length L) and tolerable error time t torr altogether and (corresponded to the difference that sweep length and actual scanning are chosen length: L '-L).
Wherein, t line=t int+t torr,
And t int＞0; T torr 〉=0 is just meaningful.
And the time t line of each bar line of this scanning can and produce by software design or software cooperation hardware design; Similarly, this scanning integrating time t int and this tolerable error time t torr also can and produce by software design or software cooperation hardware design; And in during this tolerable error time t torr, can utilize the time to carry out the Flame Image Process action, or carry out the action of test pattern scanister, or other actions that need handle.
Moreover, suppose that direct current generator is Vi (t) at the mean speed in when scanning, the average relative between this moment this scanned and this optics module is vi (t), and the vertical resolution of image-scanning device is K dpi, then:
Sweep length L ' vi (t) the t line of each bar line;
The sweep length L ' of each bar line=1/K inch;
→K· vi(t)·(t?int+t?torr)＝1
Therefore, if wish to get preferred perpendicular resolution (K dpi), then can be by directly controlling the DC voltage that is supplied to this direct current generator (DC Motor), to exchange preferable vertical resolution for by less motor speed; Perhaps, the time set by software or hardware design shortening t line then can obtain preferable vertical resolution equally; And, more can obtain satisfied sweep velocity via suitable adjustment t 1ine and vi (t).
See also Fig. 4, Fig. 5 again, it is for being used to supply power to the circuit diagram of direct current generator in the utility model preferred embodiment, in Fig. 4, be supplied to the voltage V size of this direct current generator by control, rotating speed with this direct current generator of may command, and, can further control the just commentaries on classics and the reverse of this direct current generator by this output terminal C, C.
And how to control the voltage V size of supplying with this direct current generator, and then can be via circuit design as shown in Figure 5, by the flow through electric current I c of resistance R of control bit0～bit5 and then decision, then: the voltage V=V that supplies with this direct current generator
*Therefore IcR, can control motor speed easily, and then satisfies the vertical resolution of image-scanning device.
And another technical characterstic of the present utility model, then can be and clear learning by consulting shown in Fig. 6, Fig. 7, wherein, be respectively shown in Fig. 6, Fig. 7 adapt in the utility model preferred embodiment desire the timing diagram of the scanning integrating time of sweep length.
In Fig. 6, when required sweep length is W1, can or cooperate hardware design change scanning integrating time t int and t line by software, and cooperate average relative vi (t) between this scanned and this optics module of change simultaneously, so that scan image obtains required vertical resolution; In like manner, in Fig. 7,, also can or cooperate hardware design and change scanning integrating time t int and t line, and cooperate the change motor speed simultaneously, so that scan image obtains required vertical resolution by software if required sweep length is when being W2.
Because in the utility model, this scanning integrating time t int can adapt to required sweep length and flexibly adjust, and since this scanning integrating time t int only need 〉=the required time get final product when desiring the corresponding charge coupled cell serial output data of sweep length, so, the utility model can shorten sweep time effectively by suitably adjusting t int, t line and vi (t); And in traditional practice, but fix because of scanning integrating time t int, and must in scanning process, lose time, choose in view data again and lose time in the process; Therefore, the utility model is compared with conventional art, has the progressive that can not be ignored.
Certainly, above-mentioned by adjusting scanning integrating time t int and t line, the sweep length of desire scanning to adapt to, and then the technical characterictic that shortens sweep time, should be not limited to the utlity model has in the image-scanning device of direct current generator, its design concept and embodiment also can be applicable to have in the conventional art image-scanning device of stepper motor, perhaps in the hand image-scanning device.
And for as how the utlity model has the image-scanning device of direct current generator, and obtain the mode of institute's sweep length, be described in detail as follows now:
At first, suppose that designed vertical resolution is K dpi, the mean speed of this direct current generator when scanning is Vi (t), and the average relative between this scanned and this optics module is vi (t), the length of each bar line of desire scanning is L ', and this scanned N bar sweep trace that can be divided into altogether, and the total length of institute's desire scanning is L "; Then: L
*=(tf to) vi (t)
＝(tf?to)·(L’/t?line)
＝N/K
Mode one: by microcomputer PC decision scanning zero-time to and scanning termination time tf; Can be by gated sweep zero-time to, scanning termination time tf, and via (tf-to)=L
*/ vi (t)=L
*T lineK calculates the scanning total length L of being desired
*Certainly, can know more how many bar sweep trace N common scanning finishes via conversion.
Mode two: can directly calculate the time t line that assigns N each bar line of scanning altogether by microcomputer PC, or by cooperating circuit design and structural design (for example grating, light send-receive device and dependency structure), and know the time t line that assigns N each bar line of scanning altogether, then by L
*=N/K → N=L
*K can obtain the scanning total length L that institute's desire scans
*
Mode three: the scanning total length L that adapts to institute's desire scanning
*, and in position produce a detection signal; For example, in general pellet type image-scanning device, can be by the scanned light send-receive device that touches, and know that scanning begins, and scanned when leaving a smooth send-receive device, the detection signal that light signal sent that this light send-receive device response receives, and know the end of scan; Perhaps, in the paper feed type image-scanning device, can be by the rolling number of turns of this scanned roller of transmission, and can know the total length L of scanning
*
Because this direct current generator phase in the running, can divide into initial phase (T1), normal epoch (T2) and stop the phase in advance (T3) three stages, therefore,, and obtain correct scanning result for the view data of how accepting or rejecting after the scanning, then can finish by following manner:
Mode one: can set up numerical tabular via experiment method, summarize as the direct current generator running speed V that arrives normal epoch (T2)
T2The time, the time of this (T1) required experience of initial phase, and calculate when this initial phase (T1), this direct current generator drives and the distance of walking, then on can be with the position after the scanned distance of being walked when being placed on this initial phase (T1), and assign in advance the signal that stops the phase (T3) in due course, so can make this image-scanning device scan this when scanned, direct current generator running speed V that can normal epoch (T2)
T2Scan;
Mode two: equally also can set up numerical tabular, summarize as the direct current generator running speed V that arrives normal epoch (T2) via experiment method
T2The time, this initial phase (T1) accelerates to speed V by speed zero
T2The time of Shi Suoxu or distance, and this stops the phase (T3) in advance by speed V
T2Required time or distance when being decelerated to speed zero so just can be informed in after the end of scan, should delete the scan image data of some length, to obtain correct scan image result;
Mode three: also can set up numerical tabular certainly, summarize, at this time point t respectively in initial phase (T1) and stop the phase (T3) in advance in the stage via experiment method
11, t
12, t
1n, t
31, t
32,, t
3nThe time, this direct current generator is Vi (t) at mean speed, and the average relative between corresponding this scanned and this optics module when being vi (t), and distinguish t line sweep time of corresponding each bar line of scanning
(11), t line
(12),, t line
(1n), t line
(31), t line
(32),, t line
(3n)No matter when then this image-scanning device was in initial phase (T1), normal epoch (T2) or stops the phase (T3) in advance, resulting scan image data all was correct.
And subordinate list one will be done the differentiation arrangement of a technology, effect: subordinate list one at the preferred embodiment of the image-scanning device that the utlity model has direct current generator and traditional image-scanning device with stepper motor:
| Image-scanning device with stepper motor | Image-scanning device with direct current generator | |
| Orientation problem | Because " stepping " will have the bad problem in location, and when vertical resolution requirement was high more, effect was more obvious; Its solution is must be to exchange scanning quality for than the long scan time. | Direct current generator is that continuity drives, do not have the bad shortcoming in location, therefore do not need the stable stand-by period of motor rotation, can shorten sweep time significantly. |
| Vertical resolution K | The running speed of stepper motor is irrelevant with vertical resolution, that is, can't control vertical resolution by the rotating speed of adjusting stepper motor. | K vi (t) t line=1 therefore, the mean speed Vi (t) of adjustable DC motor, or be connected the gearing (as gear set) of this direct current generator, and then adjust the average relative vi (t) between this scanned and this optics module or scan the time t line of each bar line, to satisfy vertical resolution. |
| Sweep velocity | When being subject to high vertical resolution requirement, the problem of being derived must expend the long stand-by period, and sweep velocity is obviously slow. | K vi (t) t line=1 is by adjusting vi (t) and t line, can satisfy required vertical resolution, and can shorten sweep time. |
| Production cost | The unit price of stepper motor is higher. | The unit price of direct current generator is about 1/2～1/3 price of stepper motor. |
Moreover, the utility model is by adjusting the time t line that scans integrating time t int and scan each bar line, the sweep length that adapts to institute's desire scanning, and then the technical characterictic that shortens sweep time, should be not limited to the utlity model has in the image-scanning device of direct current generator, its design concept and embodiment also can be applicable to the image-scanning device that has stepper motor in the conventional art, perhaps in the hand image-scanning device; And the utility model more can avoid locating bad problem, reduces meaningless time waste, adds fast scan speed, can reach high vertical resolution; Mode and traditional stepper motor driven mode of use that the utility model uses direct current generator to drive, both compare, the utility model can significantly reduce the interference of signal noise and the noise problem that may cause.
In sum, the utility model has disclosed a kind of image-scanning device with direct current generator that is different from conventional art and is better than conventional art, not only can improve scanning quality, and significantly shorten sweep time, the effect that low vibrations, low noise are more arranged, and can reduce production costs, technical is a quantum jump, is an invention with industrial value.
Claims (31)
1, a kind of image-scanning device with direct current generator, it is characterized in that: wherein this image-scanning device can comprise: an optics module, it is scanned to this that it is used to throw an initial optical signal, and receive the scanned optical signalling that this initial optical signal of this scanned response is produced; And a direct current motor, it is used to make this scannedly to produce a relative displacement with this optics module, makes this optics module scan this scanned action.
2, the image-scanning device with direct current generator as claimed in claim 1 is characterized in that: wherein this image-scanning device can be a platform-type image-scanning device.
3, the image-scanning device with direct current generator as claimed in claim 1 is characterized in that: wherein this image-scanning device can be a paper feed type image-scanning device.
4, the image-scanning device with direct current generator as claimed in claim 1 is characterized in that: wherein this image-scanning device can be a self-propelled image-scanning device.
5, the image-scanning device with direct current generator as claimed in claim 1 is characterized in that: wherein this image-scanning device can be a pellet type image-scanning device.
6, the image-scanning device with direct current generator as claimed in claim 1 is characterized in that: wherein this image-scanning device can be a keyboard-type image-scanning device.
7, the image-scanning device with direct current generator as claimed in claim 1 is characterized in that: wherein this scanned to can be a transmission-type scanned.
8, the image-scanning device with direct current generator as claimed in claim 1 is characterized in that: wherein this scanned can be one reflective scanned.
9, the image-scanning device with direct current generator as claimed in claim 1, it is characterized in that: wherein this optics module can comprise: a light source, it is used to provide this initial optical signal, and this initial optical signal is projected to that this is scanned, so that produce this scanned optical signalling; One reflector group, it is used to change the optical path of scanned optical signalling; One lens combination, it is used for receiving this scanned optical signalling, and changes the optical path of this scanned optical signalling; And a sensing element, it is used for receiving this scanned optical signalling, is converted to an electric signal and exports so that this is scanned optical signalling.
10, the image-scanning device with direct current generator as claimed in claim 9, it is characterized in that: wherein this sensing element can be a charge coupled cell.
11, the image-scanning device with direct current generator as claimed in claim 1 is characterized in that: wherein this optics module can be a contact-type image sensor.
12, the image-scanning device with direct current generator as claimed in claim 1 is characterized in that: wherein more comprise a gear train, be connected in this direct current generator.
13, the image-scanning device with direct current generator as claimed in claim 12 is characterized in that: wherein this gear train can be used for transmission this is scanned, makes this scannedly produce a relative displacement with this optics module.
14, the image-scanning device with direct current generator as claimed in claim 12 is characterized in that: wherein this gear train can be used for this optics module of transmission, makes this scanned and this optics module produce a relative displacement.
15, the image-scanning device with direct current generator as claimed in claim 1 is characterized in that: wherein this scannedly can be considered as being distinguished into N bar sweep trace, to carry out this scanning motion.
16, the image-scanning device with direct current generator as claimed in claim 15, it is characterized in that: wherein the length of each the bar sweep trace in this scanned N bar sweep trace can be L ' (inch), and the vertical resolution of this image-scanning device is K dpi, then the length L of each bar sweep trace '=1/K (inch).
17, the image-scanning device with direct current generator as claimed in claim 16, it is characterized in that: wherein may be defined as tline the sweep time of each the bar sweep trace in this N bar sweep trace of scanning, and wherein should sweep time tline can comprise: correspond to the scanning integrating time t int that actual scanning is chosen length, add that corresponding to length of scanning line L ' chooses the length tolerable error time t torr of difference between the two with actual scanning.
18, the image-scanning device with direct current generator as claimed in claim 17, it is characterized in that: in wherein during this tolerable error time t torr, can utilize the time to carry out the Flame Image Process action, or carry out the action of test pattern scanister, or other actions that need handle.
19, the image-scanning device with direct current generator as claimed in claim 17, it is characterized in that: wherein the mean speed of this direct current generator when carrying out scanning motion may be defined as Vi (t), and the average relative between this moment this scanned and this optics module can be vi (t).
20, the image-scanning device with direct current generator as claimed in claim 19 is characterized in that: wherein this length of scanning line L ' then can be similar to t line sweep time that average relative vi (t) between scanned and the optics module is multiplied by each bar sweep trace.
21, the image-scanning device with direct current generator as claimed in claim 20, it is characterized in that: wherein, K=1/L '=1/[vi (t) t line], can be by the mean speed Vi (t) that adjusts this direct current generator, and then adjust the average relative vi (t) between this scanned and this optics module and t line sweep time of this each bar sweep trace, to satisfy required vertical resolution K.
22, the image-scanning device with direct current generator as claimed in claim 17, it is characterized in that: wherein can be by tline sweep time that adjusts this scanning integrating time t int and each bar sweep trace, the sweep length of desire scanning to adapt to, and then shorten sweep time.
23, the image-scanning device with direct current generator as claimed in claim 1, it is characterized in that: wherein by adjusting this scanning integrating time t int, the sweep length of desire scanning to adapt to, and then the mode that shortens sweep time can be applicable to an image-scanning device with stepper motor, perhaps in the hand image-scanning device.
24, the image-scanning device with direct current generator as claimed in claim 1 is characterized in that: wherein can know by being arranged on the detection signal that a pick-up unit produced on this image-scanning device in the sweep length of carrying out this scanning motion.
25, the image-scanning device with direct current generator as claimed in claim 24 is characterized in that: wherein this pick-up unit can be and is used for this scanned roller of transmission, and by the rotation number of turns of this roller, and can know this sweep length.
26, the image-scanning device with direct current generator as claimed in claim 1, it is characterized in that: wherein can be by the scanning zero-time to and the scanning termination time tf of microcomputer PC decision image-scanning device, and be t line the sweep time of each bar sweep trace, and equal [(tf to)/t line] * L ' via sweep length, know sweep length and calculate.
27, the image-scanning device with direct current generator as claimed in claim 1, it is characterized in that: wherein can calculate tline sweep time that assigns N each bar sweep trace of scanning altogether by microcomputer PC, and N equals sweep length and is multiplied by vertical resolution, and pushes away to such an extent that sweep length equals N divided by vertical resolution.
28, the image-scanning device with direct current generator as claimed in claim 1 is characterized in that: wherein the period of operation of this direct current generator can be divided into initial phase (T1), normal epoch (T2) and stop the phase in advance (T3) three stages.
29, the image-scanning device with direct current generator as claimed in claim 28 is characterized in that: wherein can set up numerical tabular via experiment method, summarize as the direct current generator running speed V that arrives normal epoch (T2)
T2The time, this (T1) interior direct current generator of initial phase drives and the distance of walking, and be placed on the later position of the distance of being walked during this initial phase (T1) scanned, and assign in advance the signal that stops the phase (T3) in due course, can obtain correct scan image.
30, the image-scanning device with direct current generator as claimed in claim 28 is characterized in that: wherein can set up numerical tabular via experiment method, summarize as the direct current generator running speed V that arrives normal epoch (T2)
T2The time, this initial phase (T1) accelerates to speed V by speed zero
T2The time of Shi Suoxu or distance, and this stops the phase (T3) in advance by speed V
T2Required time or distance when being decelerated to speed zero so just can be informed in after the end of scan, should delete the scan image data of some length, to obtain correct scan image result.
31, image-scanning device with direct current generator as claimed in claim 28, it is characterized in that: wherein can set up numerical tabular via experiment method, summarize in initial phase (T1) and stop the phase (T3) in advance in the stage, when this time point respectively, the mean speed vi (t) of this direct current generator, average relative rotation speed vi (t) between this moment this scanned and this optics module, and distinguish t ine sweep time of corresponding each bar line of scanning, then this image-scanning device is at initial phase (T1), normal epoch (T2) or when stopping the phase (T3) in advance, all can obtain correct scan image data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99248889 CN2401937Y (en) | 1999-10-28 | 1999-10-28 | Image scanner with dc motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99248889 CN2401937Y (en) | 1999-10-28 | 1999-10-28 | Image scanner with dc motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2401937Y true CN2401937Y (en) | 2000-10-18 |
Family
ID=34033968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99248889 Expired - Fee Related CN2401937Y (en) | 1999-10-28 | 1999-10-28 | Image scanner with dc motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2401937Y (en) |
-
1999
- 1999-10-28 CN CN 99248889 patent/CN2401937Y/en not_active Expired - Fee Related
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