CN104457795A - Paper jamming judgment method for paper shredder - Google Patents
Paper jamming judgment method for paper shredder Download PDFInfo
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- CN104457795A CN104457795A CN201310421409.6A CN201310421409A CN104457795A CN 104457795 A CN104457795 A CN 104457795A CN 201310421409 A CN201310421409 A CN 201310421409A CN 104457795 A CN104457795 A CN 104457795A
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Abstract
The invention discloses a paper jamming judgment method for a paper shredder. According to the paper jamming judgment method for the paper shredder of the invention, a no-load value is updated through adopting a weighted average method, and at the same time, a waiting time is introduced, and therefore, the accuracy of paper jamming judgment can be improved; comparison values used in the paper jamming judgment method include the no-load value and a fixed value, wherein the no-load value is updated dynamically, and the fixed value is constant, and the coordination of the no-load value and the fixed value can benefit the improvement on the accuracy of judgment; the weighted average method is adopted to update the no-load value, so that judgment results can adapt to the differences of different motors and machine cores of the paper shredder, the differences of different working stages (temperature rises) of the paper shredder and differences of different operation actions of operators; and the waiting time is preset, and the waiting time is considered when the no-load value is updated, and the accuracy of the judgment can be further improved.
Description
Technical field
The invention belongs to shredder technical field, be specifically related to a kind of paperboard determination methods for shredder.
Background technology
The apparatus structure that existing a kind of shredder realizes paper jamming prevention function includes paper testing circuit, paper jamming prevention testing circuit, MCU unit and paper jamming prevention warning LED.Wherein, enter paper testing circuit and usually adopt infrared tube to detect, this infrared tube one is power valve, one is receiving tube, after tube-launched infrared light is sheltered from by paper, namely receiving tube does not receive signal, and now MCU unit can be judged as that paper inlet has paper to put into.Paper jamming prevention testing circuit comprises dielectric constant sensor, specific inductive capacity Signal-regulated kinase etc.Wherein, this dielectric constant sensor is for detecting specific inductive capacity signal, comprise the electric capacity be made up of two panels sheet metal, the capacity formula of electric capacity is C=ε S/4 Л kd, and wherein, C is capacitance, ε is dielectric parameter, S is electric capacity two substrates area, Л and k is respectively circular constant constant and electrostatic force constant, and d is electric capacity two substrates distance.Paper is put into paper inlet be namely paper is put into dielectric constant sensor electric capacity two panels sheet metal between, when paper inlet put into different-thickness, varying number paper time, the value of ε is also different, can judge whether paperboard by the change of ε.Specific inductive capacity Signal-regulated kinase is used for carrying out quantification treatment to the specific inductive capacity signal detected, is modulated into a round values, utilizes this round values to adopt certain comparative approach can judge whether there is paperboard.A fiducial value can be preset, utilize the oscillatory circuit in shredder that the sampling period is set, every a sampling period value once, compare judgement with fiducial value in real time.Because the factors such as the working temperature rising of motor, movement and the difference of user's operational motion all can have an impact to round values, therefore the precision of paper jamming prevention differs greatly, fiducial value should dynamically update, and the mode of renewal, the opportunity of renewal are on judging that the accuracy of paperboard all has impact.
Summary of the invention
In order to overcome the defect existed in prior art, the invention provides a kind of paperboard determination methods for shredder, the method can improve the accuracy judging paperboard, and concrete technical scheme is as follows:
For a paperboard determination methods for shredder, described shredder includes paper testing circuit and paper jamming prevention testing circuit; This determination methods comprises the steps:
Step S1, utilizes paper jamming prevention testing circuit sampling acquisition one instantaneous value, presets a sampling period, upgrade instantaneous value every a sampling period; Preset a quiescent value, the initial value of quiescent value is set to instantaneous value during shredder zero load; Preset a fixed value;
Wherein, instantaneous value is the round values of specific inductive capacity signal correspondence after quantizing of sampling; State when shredder zero load refers to that paper inlet of paper shredder does not have paper;
Step S2, utilizes and judges whether paper inlet has paper into paper testing circuit, if do not have paper, enter step S3, if there is paper, enter step S4;
Step S3, according to current instantaneous value, adopts average weighted method to upgrade quiescent value;
Step S3 comprises further:
Step S31, judges whether paper inlet has paper, if paper inlet does not have paper, gets current quiescent value and keeps in, enter step S32; If paper inlet has paper, enter step S4;
Step S32, judges whether paper inlet has paper again, if paper inlet does not have paper, adopt average weighted method upgrade quiescent value, weighted average method as the formula (1):
（1）
Wherein
for quiescent value,
for instantaneous value; If paper inlet has paper, enter step S4;
Step S4, whether real-time judge instantaneous value is less than the difference of quiescent value and fixed value, if then judge current as paperboard state.
As prioritization scheme, step S31 comprises further:
Step S311, presets a stand-by period; Judge whether paper inlet has paper, if paper inlet does not have paper, enter step S312; If paper inlet has paper, enter step S4;
Step S312, after the stand-by period, judges whether paper inlet has paper again, if paper inlet does not have paper, gets current quiescent value and keeps in, enter step S32; If paper inlet has paper, enter step S4.
As prioritization scheme, step S32 comprises further:
Step S321, judges whether paper inlet has paper, if paper inlet does not have paper, enters step S322; If paper inlet has paper, enter step S4;
Step S322, after the stand-by period, judges whether paper inlet has paper again, if paper inlet does not have paper, adopts average weighted method to upgrade quiescent value; If paper inlet has paper, enter step S4.
As prioritization scheme, the stand-by period is 5 seconds.
As prioritization scheme, step S3 also comprises, and after quiescent value upgrades, revolution performs step S1.
As prioritization scheme, step S4 also comprises, if judge current as paperboard state, jumps out this step and carries out paperboard process; If judge current not as paperboard state, then revolution performs step S1.
Compared with prior art, the present invention has following beneficial effect:
(1) fiducial value used in the present invention comprises quiescent value and fixed value two parts, and quiescent value dynamically updates, and fixed value remains unchanged, and both are combined with the accuracy being beneficial to and improving and judge;
(2) the present invention adopts average weighted method to upgrade quiescent value, enables the difference of the different motor of judged result simultaneous adaptation shredder, movement, the difference in (temperature rise) stage in shredder different operating stage and the difference of user's different operating action;
(3) the present invention presets a stand-by period, considers waiting time when upgrading quiescent value, improves the accuracy judged further.
Accompanying drawing explanation
Fig. 1 is general flow chart of the present invention;
Fig. 2 is the particular flow sheet of step S3;
Fig. 3 is the structural representation that shredder realizes the relevant apparatus of paper jamming prevention function.
Embodiment
The present invention is described in detail by way of example below in conjunction with accompanying drawing.
Embodiment 1:
As shown in Figure 1, a kind of paperboard determination methods for shredder, shredder includes paper testing circuit and paper jamming prevention testing circuit; This determination methods comprises the steps:
Step S1, utilizes paper jamming prevention testing circuit sampling acquisition one instantaneous value, presets a sampling period, upgrade this instantaneous value every a sampling period;
Preset a quiescent value, the initial value of quiescent value is set to instantaneous value during shredder zero load;
Preset a fixed value, this fixed value is the difference judging paper inlet whether paperboard, and the setting when dispatching from the factory, the work not with shredder changes.
Wherein, instantaneous value is the round values of specific inductive capacity signal correspondence after quantizing of sampling; State when shredder zero load refers to that paper inlet of paper shredder does not have paper.
Step S2, utilizes and judges whether paper inlet has paper into paper testing circuit, if do not have paper, enter step S3, if there is paper, enter step S4.
Step S3, according to current instantaneous value, adopts average weighted method to upgrade quiescent value; After quiescent value upgrades, revolution performs step S1.
Step S3 comprises further:
Step S31, judges whether paper inlet has paper, if paper inlet does not have paper, gets current quiescent value and keeps in, enter step S32; If paper inlet has paper, enter step S4;
Step S32, judges whether paper inlet has paper again, if paper inlet does not have paper, adopt average weighted method upgrade quiescent value, weighted average method as the formula (1):
（1）
Wherein
for quiescent value,
for instantaneous value; If paper inlet has paper, enter step S4.
In this step, the beneficial effect adopting this kind of method to upgrade quiescent value is to make up and judges whether paper inlet has the difference between the some detection of paper with paper inlet true form, that avoids this difference to cause judges whether paper inlet has the property delayed of paper, enables MCU unit get quiescent value accurately.
Step S4, whether real-time judge instantaneous value is less than the difference of quiescent value and fixed value, if then judge current as paperboard state; If judge current as paperboard state, jump out this step and carry out paperboard process; If judge current not as paperboard state, then revolution performs step S1.
Embodiment 2:
The difference of the present embodiment and embodiment 1 is, introduces the stand-by period, and done further optimization to step S3, step S31 comprises further:
Step S311, presets a stand-by period; Judge whether paper inlet has paper, if paper inlet does not have paper, enter step S312; If paper inlet has paper, enter step S4;
Step S312, after the stand-by period, judges whether paper inlet has paper again, if paper inlet does not have paper, gets current quiescent value and keeps in, enter step S32; If paper inlet has paper, enter step S4.
Step S32 comprises further:
Step S321, judges whether paper inlet has paper, if paper inlet does not have paper, enters step S322; If paper inlet has paper, enter step S4;
Step S322, after the stand-by period, judges whether paper inlet has paper again, if paper inlet does not have paper, adopts average weighted method to upgrade quiescent value; If paper inlet has paper, enter step S4.
In the present embodiment, the stand-by period is set to 5 seconds.
The reason introducing the stand-by period is, the paper testing circuit that enters of shredder exists following defect:
In the application of reality, whether shredder detects paper inlet by the infrared probe entered in paper testing circuit to have paper to put into, infrared probe just a bit detects certain of paper inlet, and paper inlet is the height in a face, when following two kinds of situations, paper inlet is actually paper, and infrared probe can't detect:
(1) from user paper inlet throw paper time, until paper lower edge arrive infrared detection probe before process;
(2) when shredder carries out shredded paper, from infrared probe is left in the upper edge of paper, until the complete broken complete process of paper;
In both cases, MCU unit all thinks that paper inlet does not have paper, but in fact, paper inlet has paper, and the renewal of quiescent value must be shredder when being in light condition, and above-mentioned defect can affect the value precision of quiescent value.
In order to avoid two kinds of situations are above on the impact of the quiescent value in the present invention, this embodiment introduces the stand-by period, when shredder is unloaded, when needing to upgrade quiescent value, if when judging that paper inlet does not have paper, first through one period of stand-by period, then judge once, if paper inlet does not still have paper, then quiescent value is upgraded.When can guarantee like this to upgrade quiescent value, shredder must be in light condition, thus improves the accuracy of paperboard judgement further.
The other technologies feature of the present embodiment is substantially the same manner as Example 1, does not repeat them here.
Two specific embodiments of the application being only above, but the not limited thereto the changes that any person skilled in the art can think of of the application, all should drop in the protection domain of the application.
Claims (6)
1., for a paperboard determination methods for shredder, described shredder includes paper testing circuit and paper jamming prevention testing circuit; It is characterized in that, this determination methods comprises the steps:
Step S1, utilizes described paper jamming prevention testing circuit sampling acquisition one instantaneous value, presets a sampling period, upgrade described instantaneous value every a sampling period; Preset a quiescent value, the initial value of described quiescent value is set to the instantaneous value during zero load of described shredder; Preset a fixed value;
Wherein, described instantaneous value is the round values of specific inductive capacity signal correspondence after quantizing of sampling; The state when zero load of described shredder refers to that paper inlet of paper shredder does not have paper;
Step S2, enters paper testing circuit and judges whether paper inlet has paper, if do not have paper, enter step S3, if there is paper, enter step S4 described in utilization;
Step S3, according to current described instantaneous value, adopts average weighted method to upgrade described quiescent value;
Described step S3 comprises further:
Step S31, judges whether paper inlet has paper, if paper inlet does not have paper, gets current described quiescent value and keeps in, enter step S32; If paper inlet has paper, enter step S4;
Step S32, judges whether paper inlet has paper again, if paper inlet does not have paper, adopts average weighted method to upgrade described quiescent value, described weighted average method as the formula (1):
（1）
Wherein
for quiescent value,
for instantaneous value; If paper inlet has paper, enter step S4;
Step S4, whether instantaneous value described in real-time judge is less than the difference of described quiescent value and described fixed value, if then judge current as paperboard state.
2. a kind of paperboard determination methods for shredder according to claim 1, it is characterized in that, described step S31 comprises further:
Step S311, presets a stand-by period; Judge whether paper inlet has paper, if paper inlet does not have paper, enter step S312; If paper inlet has paper, enter step S4;
Step S312, after the described stand-by period, judges whether paper inlet has paper again, if paper inlet does not have paper, gets current described quiescent value and keeps in, enter step S32; If paper inlet has paper, enter step S4.
3. a kind of paperboard determination methods for shredder according to claim 2, it is characterized in that, described step S32 comprises further:
Step S321, judges whether paper inlet has paper, if paper inlet does not have paper, enters step S322; If paper inlet has paper, enter step S4;
Step S322, after the described stand-by period, judges whether paper inlet has paper again, if paper inlet does not have paper, adopts average weighted method to upgrade described quiescent value; If paper inlet has paper, enter step S4.
4. a kind of paperboard determination methods for shredder according to Claims 2 or 3, it is characterized in that, the described stand-by period is 5 seconds.
5. a kind of paperboard determination methods for shredder according to claim 1, it is characterized in that, described step S3 also comprises, and after described quiescent value upgrades, revolution performs step S1.
6. a kind of paperboard determination methods for shredder according to claim 1 or 5, it is characterized in that, described step S4 also comprises, if judge current as paperboard state, jumps out this step and carries out paperboard process; If judge current not as paperboard state, then revolution performs step S1.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106669950A (en) * | 2016-11-09 | 2017-05-17 | 常州市浦西尔电子有限公司 | Control circuit for paper shredder |
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