CN110654905A - Dynamic paper state detection method and paper device thereof - Google Patents
Dynamic paper state detection method and paper device thereof Download PDFInfo
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- CN110654905A CN110654905A CN201810689352.0A CN201810689352A CN110654905A CN 110654905 A CN110654905 A CN 110654905A CN 201810689352 A CN201810689352 A CN 201810689352A CN 110654905 A CN110654905 A CN 110654905A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
- B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
- B65H7/14—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors by photoelectric feelers or detectors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/10—Handled articles or webs
- B65H2701/11—Dimensional aspect of article or web
- B65H2701/113—Size
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Abstract
The invention discloses a dynamic paper state detection method and a paper device thereof, comprising the following steps of 1: calculating the maximum inclination step number of the paper equipment; step 2: monitoring whether the paper inclines in real time, and executing the step 4 if each pair of photoelectric sensors in the same group of photoelectric sensors are blocked when the paper reaches the position of one group of photoelectric sensors; otherwise, executing step 3; and step 3: judging whether the paper is inclined beyond an acceptance range or not, and executing a step 4 if each pair of photoelectric sensors in the same group of photoelectric sensors are blocked and do not exceed the acceptance range in the stage that the newly increased steps of the stepping motor do not exceed the maximum inclined steps in the process that the paper passes through the same group of photoelectric sensors; otherwise, exceeding the acceptance range, executing the step 5; and 4, step 4: the stepping motor continues to drive the paper to move forward or backward; and 5: the stepping motor stops operating to stop the paper from advancing or retreating. The method realizes the detection of the inclination state of the dynamic paper.
Description
Technical Field
The invention belongs to a detection method, and particularly relates to a dynamic paper state detection method and a paper device thereof.
Background
With the improvement of science and technology, the existing check and large deposit receipt recovery and identification of each big bank in China are realized by bill equipment. The paper feeding mechanism is composed of a sensor and a plurality of groups of paper pickup wheels, and the paper feeding and paper withdrawing functions are completed through the paper feeding mechanism. Such apparatuses are often operated without human supervision, and as the amount of apparatuses increases, there may be an abnormal state in the paper feeding or paper discharging process due to installation differences or problems of the structural members themselves, such as: the structure does not feed back the running state of the paper in the paper feeding channel, the real-time condition of the paper cannot be detected, and if the abnormal state cannot be processed in time, unpredictable results can be brought to users.
The existing detection method for the inclined state of paper in the paper feeding or paper withdrawing process is mainly realized by aiming at static paper, specifically, the paper is placed at a sensor position, whether the static paper is inclined or not is judged through the sensor, if the static paper is inclined, the paper is taken out, and the paper position is readjusted until the paper is placed at a correct position, but in the paper feeding and paper withdrawing process, the paper actually moves dynamically, so that the existing static paper method cannot complete real-time detection in the dynamic operation process of the paper, the application space is limited, and the paper in an abnormal state cannot be processed in time.
Disclosure of Invention
The invention aims to provide a dynamic paper state detection method and a paper device thereof, which can realize the detection of the inclination state of dynamic paper.
A dynamic paper state detection method includes the following steps:
step 1: acquiring a horizontal distance corresponding to the maximum inclination angle received by the paper equipment, and calculating the maximum inclination step number of the paper equipment;
step 2: monitoring whether the paper inclines or not in real time when the paper passes through a group of photoelectric sensors;
each group of photoelectric sensors comprises two or more pairs of photoelectric sensors which are distributed along the vertical direction perpendicular to the moving direction of the paper;
when the paper reaches the position of each group of photoelectric sensors, if each pair of photoelectric sensors in the same group of photoelectric sensors are blocked, the paper does not incline, and the step 4 is executed; otherwise, the paper inclines, carry out step 3;
and step 3: judging whether the paper inclination exceeds an acceptance range according to the maximum inclination step number, if not, executing the step 4, otherwise, executing the step 5;
the judgment criterion of whether the receiving range is exceeded is as follows: when paper passes through the same group of photoelectric sensors, at the stage that the newly increased steps of the stepping motor do not exceed the maximum inclination steps, if each pair of photoelectric sensors in the same group of photoelectric sensors are blocked, the situation that the receiving range is not exceeded is shown; otherwise, indicating that the acceptable range is exceeded;
the newly added step number of the stepping motor is the difference between the current step number of the stepping motor and the step number of the stepping motor when the paper passes through the same group of photoelectric sensors for the first time;
and 4, step 4: the stepping motor continues to drive the paper to move forward or backward;
and 5: the stepping motor stops operating to stop the paper from advancing or retreating.
When the paper passes through the same group of photoelectric sensors, whether the paper inclines or not is judged by judging whether each pair of photoelectric sensors of the same group of photoelectric sensors are shielded or not, whether the paper inclines or not is judged by judging whether each pair of photoelectric sensors of the same group of photoelectric sensors are shielded at the maximum inclination step number, and then the inclined paper exceeding the acceptance range is identified, so that the stepping motor stops running, and faults are cleared in time; meanwhile, the paper state detection method is based on the fact that paper is in dynamic operation, so that the normal operation of paper equipment is not affected, and the problem of the paper state can be found more timely
Further preferably, the maximum number of inclination steps is calculated as follows:
s＝d/z
in the formula, s is the maximum inclination step number, d is the horizontal distance corresponding to the maximum inclination angle received by the paper equipment, and z is the step pitch of a stepping motor in the equipment.
Further preferably, the method also comprises detecting whether the paper is stretched or jammed, and specifically comprises the following steps:
s1: sequentially collecting the running time of the paper among the three groups of photoelectric sensors in the detection group;
the number of the groups of the photoelectric sensors in the paper equipment is more than or equal to 3, each three groups of the photoelectric sensors form a detection group, and the photoelectric sensors in each detection group are divided into a first group of the photoelectric sensors, a second group of the photoelectric sensors and a third group of the photoelectric sensors along the running direction of paper;
the runtime collected in step S1 includes: theoretical time T for paper head to run from position of second set of photoelectric sensor to position of third set of photoelectric sensorA·S2→S3And an actual time tA·S2→S3Theoretical time T for the tail to travel from the position of the first set of photosensors to the position of the second set of photosensorsB·S1→S2And an actual time tB·S2→S3；
S2: judging whether the paper is stretched or blocked according to the collected running time based on a preset diagnosis rule;
if the stretching or the blocking exists, executing the step 5;
otherwise, executing step 4, if there are photoelectric sensors which the paper does not pass through, acquiring the running time of the paper between the three groups of photoelectric sensors in the next detection group along with the movement of the paper, and then executing step S2; if the photoelectric sensor which does not pass through does not exist, the paper is normal;
the preset diagnosis rule is as follows:
if t is satisfiedA·S2→S3＝TA·S2→S3，tB·S1→S2＝TB·S1→S2The detection results corresponding to the current three groups of photoelectric sensors are normal;
if t is satisfiedA·S2→S3＝TA·S2→S3，tB·S1→S2＞TB·S1→S2The detection results corresponding to the current three groups of photoelectric sensors are paper stretching,
if t is satisfiedA·S2→S3＞TA·S2→S3，tB·S1→S2＝TB·S1→S2The detection results corresponding to the current three groups of photoelectric sensors are paper jam,
if t is satisfiedA·S2→S3＞TA·S2→S3，tB·S1→S2＞TB·S1→S2And the detection results corresponding to the current three groups of photoelectric sensors are paper jam.
The different sets of photosensors are distributed along the direction of travel of the sheet so that as the sheet moves, the sheet will move from one set of photosensors to the other. The invention judges whether the paper is stretched or blocked according to the theoretical time and the actual time of the paper running among different groups of photoelectric sensors. The method for detecting the state of the stretched and blocked paper is also based on the fact that the paper runs dynamically, so that the normal running of paper equipment is not affected, and meanwhile, the problem of the state of the paper can be found more timely.
Further preferably, the actual time that the paper is running between the two sets of photosensors is counted by a timer.
For example, when the paper head reaches the second group of photoelectric sensors, the timer is set to be 0, and when the paper head moves to the third group of photoelectric sensors, the timer counts time, and finally the actual time t when the paper head moves from the position of the second group of photoelectric sensors to the position of the third group of photoelectric sensors is obtainedA·S2→S3。
Further preferably, the theoretical time of the paper running between the two groups of photoelectric sensors is equal to the sum of the acceleration time, the constant speed time and the deceleration time calculated according to a preset speed table;
the preset speed meter comprises an acceleration grade, a constant speed grade and a clock number and a step number corresponding to the deceleration grade between two groups of photoelectric sensors, and is as follows:
the calculation formulas of the acceleration time, the constant speed time and the deceleration time are as follows: (same page 4)
ta＝(A1×a1+A2×a2+...+An×an)×1000/f
tb＝B×b×1000/f
tc＝(C1×c1+C2×c2+...+Cm×cm)×1000/f
In the formula, ta、tb、tcRespectively representing acceleration time, uniform speed time and deceleration time, and f is clock frequency.
The preset speedometer is a standard speedometer, the speed process between the two groups of photoelectric sensors is any combination of an acceleration process, a constant speed process and a deceleration process, and if the acceleration process, the constant speed process or the deceleration train does not exist, the number of clocks corresponding to the acceleration grade, the constant speed grade or the deceleration grade in the speedometer is 0.
On the other hand, the invention provides a paper device, which comprises a photoelectric sensor, a detection module, a central processing unit and a stepping motor which are sequentially in communication connection;
the photoelectric sensors of the paper device form at least one group of photoelectric sensors, each group of photoelectric sensors comprises two or more pairs of photoelectric sensors, and the photoelectric sensors are distributed along the vertical direction perpendicular to the movement direction of the paper;
the detection module is used for detecting whether the paper inclines or not and whether the paper inclines or not beyond an acceptance range according to the method of the steps 1 to 3 in the claim 1, and sending the detection result to the central processing unit;
and the central processing unit is used for controlling the stepping motor to continue or stop running according to the detection result.
Further preferably, the detection module is an FPGA module or an ARM module.
The FPGA module has the advantages of high speed, strong flexibility and parallel processing.
Further preferably, the number of sets of the photoelectric sensors in the sheet device is greater than or equal to 3, and the photoelectric sensors of each set are distributed along the sheet running direction.
Advantageous effects
Compared with the prior art, the invention has the advantages that:
1. the invention skillfully arranges a plurality of pairs of photoelectric sensors in the vertical direction which is vertical to the running direction of the paper, thereby forming a group of photoelectric sensors, and when the monitoring paper passes through the same group of photoelectric sensors, judging whether the paper inclines or not by judging whether each pair of photoelectric sensors of the same group of photoelectric sensors are shielded or not, judging whether the paper inclines or not in an acceptable range by judging whether each pair of photoelectric sensors of the same group of photoelectric sensors are shielded in the maximum inclination steps or not, the detection method is based on the dynamic running of the paper, so that the normal running of the paper equipment is not influenced, meanwhile, the problem of the state of the paper can be found more timely, the condition of the inclination of the paper can be found timely, the paper is prevented from being torn or wrinkled in the movement process, economic loss of a user is avoided, and better experience of the user is achieved.
2. The invention skillfully arranges a plurality of groups of photoelectric sensors in the running direction of the paper, and judges whether the paper is stretched or blocked according to the theoretical time and the actual time of the running of the paper between different groups of photoelectric sensors. The method for detecting the state of the stretched and blocked paper is also based on the fact that the paper runs dynamically, so that the normal running of paper equipment is not affected, and meanwhile, the problem of the state of the stretched and blocked paper can be found more timely.
Drawings
FIG. 1 is a schematic diagram of a distribution of several groups of photosensors provided by the present invention;
FIG. 2 is a schematic diagram of each set of photosensors provided by the present invention;
FIG. 3 is a schematic diagram of the position of each set of photosensors and the direction of travel of the sheet of paper provided by the present invention;
FIG. 4 is a schematic flow diagram of a dynamic sheet condition detection method in sheet skew inspection provided by the present invention;
FIG. 5 is a schematic diagram of the inclination of the paper provided by the present invention;
wherein the reference numerals are further explained as follows:
1. photoelectric sensor, 2, paper, 3, paper feed direction.
Detailed Description
The present invention will be further described with reference to the following examples.
As shown in fig. 1, the present invention provides a sheet apparatus in which different sets of photosensors are distributed along the direction of sheet travel. In this embodiment, three sets of photoelectric sensors are provided in the paper device as an example, in other feasible embodiments, if the paper device only has a function of detecting paper inclination, at least one set of photoelectric sensors is only required to be present in the paper device, and if the paper device has a function of detecting stretching and blocking in addition to paper inclination, more than three sets of photoelectric sensors are provided in the paper device. As shown in fig. 2 and 3, each group of photosensors in this embodiment is provided with two pairs of upper and lower photosensors 1, and the photosensors 1 in the same group are arranged in a direction perpendicular to the direction of paper movement.
1. Tilting of paper
As shown in fig. 4, in order to implement the paper skew detection, the present invention provides a dynamic paper state detection method, including the steps of:
step 1: and acquiring the horizontal distance corresponding to the maximum inclination angle received by the paper equipment, and calculating the maximum inclination step number of the paper equipment.
As shown in fig. 5, the horizontal distance d corresponding to the maximum inclination angle θ of the sheet 2, the maximum number of inclination steps s is calculated as follows:
s＝d/z
wherein z is the step distance of the stepping motor in the device.
Step 2: monitoring whether the paper inclines or not in real time when the paper passes through a group of photoelectric sensors;
when the paper reaches the position of one group of photoelectric sensors, if each pair of photoelectric sensors in the same group of photoelectric sensors are blocked, the paper does not incline, and the step 4 is executed; otherwise, the paper is inclined, and step 3 is executed.
Wherein, if be equipped with multiunit photoelectric sensor in the paper equipment, can select arbitrary one set or arbitrary multiunit photoelectric sensor to monitor whether the paper inclines as required. The first group of photosensors in the sheet running direction is preferred as the inclination detection sensor in this embodiment.
And step 3: judging whether the paper inclination exceeds an acceptance range according to the maximum inclination step number;
when paper passes through the same group of photoelectric sensors, judging whether each pair of photoelectric sensors in the same group of photoelectric sensors are blocked in real time at the stage that the newly increased steps of the stepping motor do not exceed the maximum inclined steps, if so, executing a step 4; otherwise, exceeding the acceptance range, executing the step 5;
the newly added step number of the stepping motor is the difference between the current step number of the stepping motor and the current step number of the stepping motor when the paper passes through the same group of photoelectric sensors for the first time.
The specific implementation process is A-C:
a: recording the current step number of the stepping motor when the paper is judged to be inclined in the step 2;
b: b, in the process that the paper passes through the same group of photoelectric sensors, judging whether the current step number of the stepping motor does not exceed the sum of the step number recorded in the step A and the maximum inclination step number in real time, and if not, executing the step C; if the paper inclination exceeds the acceptance range, the paper is inclined;
c: judging whether each pair of photoelectric sensors in the same group of photoelectric sensors are blocked or not, if so, inclining the paper to be within the acceptance range; otherwise, returning to the step B.
And 4, step 4: the stepping motor continues to drive the paper to move forward or backward;
and 5: the stepping motor stops operating to stop the paper from advancing or retreating.
Specifically, the paper inclines and exceeds the acceptance range, and the CPU controls the stepping motor to stop running so as to prevent the paper from being torn or folded in the movement process, avoid bringing economic loss to users, and bring better experience to users.
In summary, the invention detects the paper inclination and whether the inclination is in the acceptable range through the upper and lower photoelectric sensors of the group of photoelectric sensors, that is, when the paper reaches the group of photoelectric sensors, only one pair of the photoelectric sensors is shielded, but within the maximum inclination step number, both pairs of the photoelectric sensors are shielded, and the paper inclination is determined to be acceptable, and the paper can continue to run. If only one photoelectric sensor is still shielded after the motor passes through the maximum inclination steps, the paper is judged to be inclined beyond the acceptable range, and the paper stops moving.
2. Drawing and blocking of paper
On the basis of the inclination of the paper, the dynamic paper state detection method provided by the invention also comprises the following steps of detecting whether the paper is stretched or blocked, and specifically:
s1: sequentially collecting the running time of the paper among the three groups of photoelectric sensors in the detection group;
the number of the groups of the photoelectric sensors in the paper equipment is more than or equal to 3, each three groups of the photoelectric sensors form a detection group, and in the embodiment, 3 groups of the photoelectric sensors are arranged in the paper equipment and just form one detection group. The photoelectric sensors in each detection group are divided into a first group of photoelectric sensors, a second group of photoelectric sensors and a third group of photoelectric sensors along the paper running direction. It should be noted that, in this embodiment, only three groups of photosensors are provided, so that only one detection group is formed, and the first group of photosensors, the second group of photosensors, and the third group of photosensors are three groups of photosensors which are adjacent in sequence. Different detection groups require that the photosensors are not identical, and three groups of photosensors in a detection group may not be three groups of photosensors that are adjacent in sequence.
In this embodiment, the running time collected in step S1 includes: theoretical time T for paper A to travel from the position of the second set of photosensors S2 to the position of the third set of photosensors S3A·S2→S3And an actual time tA·S2→S3Theoretical time T for the tail B to travel from the position of the first set of photosensors S1 to the position of the second set of photosensors S2B·S1→S2And an actual time tB·S2→S3；
S2: judging whether the paper is stretched or blocked according to the collected running time based on a preset diagnosis rule;
if the stretching or the blocking exists, executing the step 5;
otherwise, executing step 4, if there are photoelectric sensors which the paper does not pass through, acquiring the running time of the paper between the three groups of photoelectric sensors in the next detection group along with the movement of the paper, and then executing step S2; if the photoelectric sensor which does not pass through does not exist, the paper is normal.
In this embodiment, since only three sets of photosensors are provided in the paper device, if it is determined at S2 that there is no stretching or jamming, there is no photosensor through which the paper passes, and a conclusion that the paper is normal is obtained.
The preset diagnosis rule is as follows:
if t is satisfiedA·S2→S3＝TA·S2→S3，tB·S1→S2＝TB·S1→S2The detection results corresponding to the current three groups of photoelectric sensors are normal;
if t is satisfiedA·S2→S3＝TA·S2→S3，tB·S1→S2＞TB·S1→S2The detection results corresponding to the current three groups of photoelectric sensors are paper stretching,
if t is satisfiedA·S2→S3＞TA·S2→S3，tB·S1→S2＝TB·S1→S2The detection results corresponding to the current three groups of photoelectric sensors are paper jam,
if t is satisfiedA·S2→S3＞TA·S2→S3，tB·S1→S2＞TB·S1→S2And the detection results corresponding to the current three groups of photoelectric sensors are paper jam.
Wherein the actual time is counted by a timer. For example, when a reaches S2, the timer is set to 0, i.e., the timer register counter is 0, a self-adds the timer between S2 and S3, i.e., the timer register counter +1, and when a reaches S3, the value of the timer is tA·S2→S3I.e. the timing register counter tA·S2→S3。
The theoretical time of the paper running between the two groups of photoelectric sensors is equal to the sum of the acceleration time, the constant speed time and the deceleration time calculated according to a preset speed meter. For example, the acceleration table, the uniform speed table, and the deceleration table between S1 and S2 are as follows:
the clock frequency adopted is f, then B is from S1 to theoretical time T of S2B·S1→S2In ns, the calculation method is as follows:
TB·S1→S2＝ta+tb+tc
＝(6+4+2)×1000/f+2×4×1000/f+(4+6)×1000/f
＝30000/f
it should be noted that there may be only an acceleration process, only a constant speed process, only a deceleration process, both an acceleration process and a constant speed process, and also these standard acceleration, constant speed, and deceleration processes between each two sets of photosensors. The theoretical time between each two sets of photosensors needs to be calculated according to the actual design of the system.
3. Length of paper
Based on the state detection of the inclination, the stretching and the blockage of the paper, the dynamic paper state detection method provided by the invention further comprises the step of measuring and calculating the length of the paper. The specific implementation process is as follows:
and when S1 is from no shielding to shielding, the step number is set to be 0, the step number is superposed during the shielding period S1, when S1 is from shielding to shielding, the step number superposition is finished, and the current step number n is multiplied by the step distance z of the stepping motor to obtain the paper length L. I.e., L ═ n × z. Where S1 denotes a group of photosensors through which the sheet in the running direction passes first.
It should be noted that, during the measurement of the length of the paper, the fact that the photoelectric sensors are shielded means that the upper and lower pairs of photoelectric sensors are shielded by the paper, the binary value of the group of sensors detected by the FPGA detection module is 2 'b 00, the fact that the upper and lower groups of photoelectric sensors are not shielded by the paper is not shielded, and the binary value of the group of photoelectric sensors detected by the FPGA detection module is 2' b 11.
Based on the method, the invention provides a paper device, which comprises a photoelectric sensor, a detection module, a Central Processing Unit (CPU) and a stepping motor which are sequentially in communication connection;
the detection module is used for detecting whether the paper inclines or not and whether the paper inclines or not beyond an acceptance range according to the methods of the steps 1 to 3, and sending a detection result to the central processing unit; the preferred detection module is an FPGA module or an ARM module. In this embodiment, an FPGA module is selected.
And the central processing unit CPU is used for controlling the stepping motor to continue or stop running according to the detection result.
In this embodiment, the paper device includes 3 sets of photoelectric sensors, and 3 sets of photoelectric sensors are respectively along paper traffic direction distribution, and each set of photoelectric sensor includes two pairs of photoelectric sensors, and all distributes along the vertical direction that is perpendicular to paper direction of motion. In other possible embodiments, more than 3 sets of photosensors may be provided, with more than 2 pairs of photosensors provided in each set.
It should be emphasized that the examples described herein are illustrative and not restrictive, and thus the invention is not to be limited to the examples described herein, but rather to other embodiments that may be devised by those skilled in the art based on the teachings herein, and that various modifications, alterations, and substitutions are possible without departing from the spirit and scope of the present invention.
Claims (8)
1. A dynamic paper state detection method is characterized in that: the method comprises the following steps:
step 1: acquiring a horizontal distance corresponding to the maximum inclination angle received by the paper equipment, and calculating the maximum inclination step number of the paper equipment;
step 2: monitoring whether the paper inclines or not in real time when the paper passes through a group of photoelectric sensors;
each group of photoelectric sensors comprises two or more pairs of photoelectric sensors which are distributed along the vertical direction perpendicular to the moving direction of the paper;
when the paper reaches the position of one group of photoelectric sensors, if each pair of photoelectric sensors in the same group of photoelectric sensors are blocked, the paper does not incline, and the step 4 is executed; otherwise, the paper inclines, carry out step 3;
and step 3: judging whether the paper inclination exceeds an acceptance range according to the maximum inclination step number, if not, executing the step 4, otherwise, executing the step 5;
the judgment criterion of whether the receiving range is exceeded is as follows: when paper passes through the same group of photoelectric sensors, at the stage that the newly increased steps of the stepping motor do not exceed the maximum inclination steps, if each pair of photoelectric sensors in the same group of photoelectric sensors are blocked, the situation that the receiving range is not exceeded is shown; otherwise, indicating that the acceptable range is exceeded;
the newly added step number of the stepping motor is the difference between the current step number of the stepping motor and the step number of the stepping motor when the paper passes through the same group of photoelectric sensors for the first time;
and 4, step 4: the stepping motor continues to drive the paper to move forward or backward;
and 5: the stepping motor stops operating to stop the paper from advancing or retreating.
2. The method of claim 1, wherein: the maximum number of inclination steps is calculated as follows:
s＝d/z
in the formula, s is the maximum inclination step number, d is the horizontal distance corresponding to the maximum inclination angle received by the paper equipment, and z is the step pitch of a stepping motor in the equipment.
3. The method of claim 1, wherein: the method also comprises the steps of detecting whether the paper is stretched or jammed, and specifically executing the following steps:
s1: sequentially collecting the running time of the paper among the three groups of photoelectric sensors in the detection group;
the number of groups of the photoelectric sensors in the paper equipment is more than or equal to 3, each three groups of photoelectric sensors form a detection group, the photoelectric sensors in each detection group are divided into a first group of photoelectric sensors, a second group of photoelectric sensors and a third group of photoelectric sensors along the running direction of the paper,
the runtime collected in step S1 includes: theoretical time T for paper head to run from position of second set of photoelectric sensor to position of third set of photoelectric sensorA·S2→S3And an actual time tA·S2→S3Theoretical time T for the tail to travel from the position of the first set of photosensors to the position of the second set of photosensorsB·S1→S2And an actual time tB·S2→S3；
S2: judging whether the paper is stretched or blocked according to the collected running time based on a preset diagnosis rule;
if the stretching or the blocking exists, executing the step 5;
otherwise, executing step 4, if there are photoelectric sensors which the paper does not pass through, acquiring the running time of the paper between the three groups of photoelectric sensors in the next detection group along with the movement of the paper, and then executing step S2; if the photoelectric sensor which does not pass through does not exist, the paper is normal;
the preset diagnosis rule is as follows:
if t is satisfiedA·S2→S3＝TA·S2→S3，tB·S1→S2＝TB·S1→S2The detection results corresponding to the current three groups of photoelectric sensors are normal;
if t is satisfiedA·S2→S3＝TA·S2→S3，tB·S1→S2＞TB·S1→S2The detection results corresponding to the current three groups of photoelectric sensors are paper stretching,
if t is satisfiedA·S2→S3＞TA·S2→S3，tB·S1→S2＝TB·S1→S2The detection results corresponding to the current three groups of photoelectric sensors are paper jam,
if t is satisfiedA·S2→S3＞TA·S2→S3，tB·S1→S2＞TB·S1→S2And the detection results corresponding to the current three groups of photoelectric sensors are paper jam.
4. The method of claim 3, wherein: the actual time that the paper runs between the two sets of photosensors is counted by a timer.
5. The method of claim 3, wherein: the theoretical time of the paper running between the two groups of photoelectric sensors is equal to the sum of the acceleration time, the constant speed time and the deceleration time calculated according to a preset speed meter;
the preset speed meter comprises an acceleration grade, a constant speed grade and a clock number and a step number corresponding to the deceleration grade between two groups of photoelectric sensors, and is as follows:
the calculation formulas of the acceleration time, the constant speed time and the deceleration time are as follows:
ta＝(A1×a1+A2×a2+...+An×an)×1000/f
tb＝B×b×1000/f
tc＝(C1×c1+C2×c2+...+Cm×cm)×1000/f
in the formula, ta、tb、tcRespectively representing acceleration time, uniform speed time and deceleration time, and f is clock frequency.
6. A sheet device characterized by: the device comprises a photoelectric sensor, a detection module, a central processing unit and a stepping motor which are sequentially in communication connection;
the photoelectric sensors of the paper device form at least one group of photoelectric sensors, each group of photoelectric sensors comprises two or more pairs of photoelectric sensors, and the photoelectric sensors are distributed along the vertical direction perpendicular to the movement direction of the paper;
the detection module is used for detecting whether the paper inclines or not and whether the paper inclines or not beyond an acceptance range according to the method of the steps 1 to 3 in the claim 1, and sending the detection result to the central processing unit;
and the central processing unit is used for controlling the stepping motor to continue or stop running according to the detection result.
7. The sheet device according to claim 6, wherein: the detection module is an FPGA module or an ARM module.
8. The sheet device according to claim 6, wherein: the number of the groups of the photoelectric sensors in the paper equipment is more than or equal to 3, and the photoelectric sensors in each group are distributed along the running direction of the paper.
Priority Applications (1)
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