JPS6148193B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a medium supply interval check method, and in particular, when a data processing device continuously reads a medium on which data such as a form is written, the present invention relates to a method for checking the supply interval of media that are sequentially supplied. Regarding what you want to check.

For example, a form reading device used in a data processing device, as shown in FIG. 1, guides the form a shown in FIG.
The OMR 2 reads the mark, and then the optical character reader OCR 3 reads characters, such as typed numbers, and then judges whether the characters can be read or not.Based on this judgment, the separator 4 is activated to make it readable. The form a is sorted into an accept receiving section 5a and a reject receiving section 5b of the stacker 5, with those that are unreadable being accepted and those that are unreadable being rejected.

Since there is a strong demand for low-cost devices in such devices, low-speed OCR devices are used. Therefore, at such a low speed
When using OCR, the user manually feeds form a one by one, which is then read by OCR. However, there is a drawback that it takes a very long time to process a large number of forms in this way, so it is required to automatically supply these many forms and read them one after another. The problem in this case is that when recognizing the numbers on form a,
In order to perform interpretation by sequentially comparing OCR read input data with standard patterns stored separately, it recognizes all of the large number of numbers printed on the form. A certain amount of time is required to perform the check process. Therefore, as shown in FIG. 3, a minimum interval is required between reading the previous form _a1 and reading the next form _a2 . Of course, if the forms a ₁ and a ₂ overlap on almost the entire surface as shown in Fig. 4A, or if _a paper jam occurs in the middle as shown in Fig. also the following sensor
Not only in the case where _S2 is not reached, but also in the case where the form a partially overlaps as shown in the same figure, the reliability of the form reading result cannot be expected for the reasons mentioned above. Therefore, in such a case, it is necessary to determine that it is unreadable and to control the separator 4. Note that the conditions in A and B in Figure 4 are called double feed, and the condition in A is monitored by the thickness detection sensor S ₃ , and the condition in B is monitored in the forms A ₁ and A ₂ .
is monitored continuously as it passes through sensors S ₄ and S ₅ .

By the way, in order to automatically feed a large number of forms a, as shown in FIG. The documents a are sent out one by one by a roll _R0 , and the documents a are sucked in one by one through the gap between the rolls _R1 and _R2 constituting the suction section 1. However, although the rolls R ₁ and R ₂ are configured to suck in the preceding form a and then suck in the subsequent form a at larger regular intervals,
This method of suction varies slightly depending on the paper quality of the form and the atmosphere such as the surrounding temperature, so even if the forms are sent out at regular intervals with roll R ₀ , the intervals between the forms a fed from the suction unit 1 will be at constant intervals. Sometimes you can't keep it. Thus, as shown in FIG. 3, if the form a is supplied at an interval shorter than the interval, it becomes unreadable as described above. However, in the past, checking the intervals between forms has not been done. Therefore, it has been desired to perform this check in order to improve the reliability of reading the forms.

Therefore, as described above, in the past, when a large number of media such as forms were automatically supplied and an attempt was made to read them, the reliability of reading the media was not sufficient because the feeding interval of the media was not checked. In order to improve the above-mentioned problems, the present invention provides a medium supply interval check method that detects the medium supply interval and checks whether the interval is longer or shorter than the above. To this end, the medium supply interval check method of the present invention is provided in a data processing apparatus that sequentially supplies and processes sheet media, which includes an interval detection means for detecting the interval between the preceding sheet medium and the following sheet medium, a comparison means, and a control unit. means for detecting the interval between the preceding sheet medium and the following sheet medium by the interval detecting means, comparing the detected interval with a reference value by the comparing means, and controlling the control means based on the comparison result. It is characterized by operating to select media.

Next, one embodiment of the present invention will be described based on FIGS. 5 to 8.

Fig. 5 is a principle diagram of the detection method in this embodiment, Fig. 6 is an explanatory diagram of a reading device using the detection method, Fig. 7 is a check circuit diagram thereof, and Fig. 8 is a diagram of the detection sensor shown in Fig. 7. This is a time chart of the output.

In the figure, the same reference numerals as in other figures indicate the same components, and 7 is a detection sensor, 8 is an inverter,
9 is a delay circuit, 10 is a counter, 11 is a comparison circuit, and 12 is a separator control circuit.

The detection sensor 7 is a sensor that detects the interval between the forms a that are sequentially supplied from the suction unit 1, and is provided at the supply port of the suction unit 1, as shown in FIG.
A signal is generated so that the time T _G from the trailing edge of the preceding form a ₁ to the leading edge of the succeeding form a ₂ can be detected. This time chart is shown in FIG. 8, which will be described later.

The counter 10 performs a counting operation during the above time T _G ,
It outputs the result, counts the clock CL based on the input from the detection sensor 7, and is reset by the delay circuit 9.

The comparator circuit 11 compares the counted value G of the counter corresponding to the time T _G with a reference value C _R indicating the number of clocks CL corresponding to the time Tmin during which the form travels between the forms. counter 1
The result of comparing the input value from 0 with this reference value _CR is G
> _CR , it outputs logic "1".

Next, the operation of the present invention will be explained.

As shown in FIG.
It is supplied sequentially at intervals from This form a is first read with the mark by OMR2, and then
The numbers are read by OCR3. Then, a determination is made as to whether or not reading is possible, and the separator 4 is controlled based on the result, and the forms a, a, . During this time, the states A, B, and C shown in FIG. 4 are checked, and based on this check, the forms a, a, . In addition to these screenings, the form a, which is a feature of the present invention, is subjected to screening based on the results of comparing the T _G and Tmin described above.

The comparison check of form a, which is a feature of the present invention, will be explained below.

First, the form a supplied from the suction unit 1 in FIG.
For example, when the detection sensor 7 detects the leading edge of the form _a1 shown in FIG. 5, it generates a logic "1" as a detection signal at time _t1 as shown in FIG. This detection signal logic "1" is inverted by the inverter 8 and becomes logic "0". Therefore, counter 10 does not operate in this case. In this manner, the detection sensor 7 generates the detection signal logic "1" and the counter 10 remains inoperative until time _t2 when the form _a1 finishes passing through the sensor 7. When the form a ₁ finishes passing through the detection sensor 7, the detection sensor 7 generates a logic "0",
This logic "0" is inverted by the inverter 8 and becomes logic "1". This is input to the counter 10,
The counter 10 counts the clock CL. This state continues for a time T _G until time t ₃ when the detection sensor 7 detects the subsequent form a ₂ . At time t ₃ , the detection sensor 7 detects form a ₂ in the same way as form a ₁ .
detects the leading edge of and generates a logic "1". This signal "1" is inverted by inverter 8 and becomes logic "0".
Therefore, the counter 10 stops counting operation. This causes the comparison circuit 11 to operate and compare the count value G of the counter 10 with the reference value _CR . At this time, if the time difference between time t ₂ and t ₃ is greater than the above Tmin, G
> _CR , and the comparator circuit 11 outputs logic "1". As a result, the separator control circuit ₁₂
is determined to have been read correctly, and the separator 4
control. Then, at time _{t4, which is slightly delayed after the inverter 8 outputs a logic "0" at time t3 ,} the delay circuit 9 outputs a logic "1" and sets the counter 10. However, when the interval between forms a ₁ and a ₂ is shorter than the above-mentioned minimum interval, G<C _R and the comparator circuit 11 outputs logic "0". As a result, the separator control circuit 12 determines that the form _a1 has not been correctly read, and moves the separator 4 toward the reject receiving portion 5b.

In this way, at time _t5 when the form _a2 passes the sensor 7, the counter 10 starts counting again, and checks whether the form _a2 can be read accurately. This process is repeated in the same way, and it is checked whether each of the many forms a, a, . . . has been read correctly one after another.

As described above, according to the present invention, in a data processing device, for example, the sheet medium supply interval for reading is detected, and this is compared with the minimum readable interval to determine whether or not the medium can be read. Since the media are sorted, the reliability of reading can be increased even when the media are fed at as short intervals as possible to improve work efficiency, especially in a reading device with a slow reading speed.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional reading device, FIG. 2 is a diagram showing a form, FIG. 3 is a diagram of the principle of medium supply interval detection, and FIG. 4 is a diagram of the principle of conventional paper weight and paper jam detection. 5 to 8 show an embodiment of the present invention, in which FIG. 5 is a principle diagram of a medium supply interval detection method, FIG. 6 is an explanatory diagram of a reading device using the detection method, FIG. 7 is a check circuit diagram thereof, and FIG. 8 is a time chart of the output of the detection sensor shown in FIG. In the figure, 1 is the suction part, 2 is the OMR, 3 is the OCR, 4 is the separator, 5 is the stacker, 5a is the accept receiving part, 5b is the reject receiving part, 6 is the hopper,
R ₀ , R ₁ , R ₂ are rolls, 7, S ₁ , S ₂ , S ₃ , S ₄ , S ₅
is a sensor, and a is a form.

Claims (1)

[Claims] 1. A data processing device that sequentially supplies media to a processing device to perform desired processing, comprising an interval detection means for detecting an interval between a preceding medium and a succeeding medium, a comparison means, and a control means, the interval detection means to determine the distance between the leading medium and the succeeding medium, and compare this detected distance with a reference value by the comparison means,
A medium supply interval checking method characterized in that the control means is operated according to the comparison result to classify the medium.