JPS5827272A - Bar-code input device - Google Patents

Abstract

PURPOSE:To prevent the titled device from generation of an error by inhibiting the input of reading information from a bar-code reader for the period till a prescribed time elapses after the completion of the reading of necessary information. CONSTITUTION:After starting of the reading of an encode BE by a bar-code reader, a CPU2 outputs a signal BE of ''1'' to an AND gate 3 to open the gate 3. Three signals of level ''1'' due to a continuous bit and check-sum are outputted from the AND gate 3 and inputted to ternary counter 5 through a CR differential circuit 4 to be counted. The carrier output of the ternary counter 5 is supplied to the CPU2 and a CR differential circuit 6, so that the CPU2 stops the output of the signal BE and an output pulse from the CR differential circuit 6 is applied to respective reset input terminals R of a counter 7 and an SR type flip flop 8 to reset them.

Description

[Detailed description of the invention] The present invention relates to a barcode input device.

2. Description of the Related Art In recent years, barcode input devices have been developed that write digital information as a barcode on a card or the like by printing or the like, and read this digital information with a barcode reader to input pitch information to, for example, an electronic musical instrument.

By the way, with conventional barcode input devices, the card is placed on a desk or the like and the barcode is traced and scanned with a barcode reader, but if there is a dirt stain near the end of a series of barcodes, This stain could be read by mistake, causing an error.

Also, when there is a large amount of information, the barcode is printed over multiple lines on the card, but in such cases, the information content on each line is different, making the line lengths uneven and unattractive. There were drawbacks. Furthermore, it is necessary to provide a margin (hereinafter referred to as margin space) at the end of each of the nine lines, which also has the drawback of reducing the amount of information that can be accommodated on one card.

This invention was made against the backdrop of the above-mentioned circumstances, and its purpose is to allow the barcode reader to input read information until a predetermined period of time elapses after reading the necessary information. It is an object of the present invention to provide a barcode input device that can eliminate the various drawbacks of the conventional methods described above.

Various embodiments will be described below with reference to nine drawings.

FIG. 1 is a circuit diagram of the first embodiment. On the card (for example, see Figure 8), digital information with predetermined contents is embedded in a series of barcodes by printing or other methods, and the above information is read by a barcode reader (illustrated path). is the CPU (Central Processing Unit) 2 via the AND gate 1.
and is input to AND gate 8. The necessary digital information input to the CPU 2 is stored in the RAM.
(random access memory, path shown).

be remembered.

To explain the barcode on the card on board, referring to Fig. 8, the last data in the series of necessary digital information (shown by (1) in Fig. 8 <a>) is followed by 4 bits all "1". The end code (Figure 8 (a
), continuation bit, and checksum data (indicated by (8) and (4), respectively, in FIG. 8(a)) are respectively included. The continuation bit is data indicating the presence or absence of the next line, and the checksum is check data.

After the barcode reader starts reading the end code BE, the CPU 2 outputs a signal BE of 1" and supplies it to the AND gate 8 to open the AND gate 8. Therefore, from the AND gate 8, as shown in FIG. Eight 1" level signals are output based on the continuation bit and checksum shown in (b).

It is input to the octal counter 5 via the OR differentiation circuit 4.

It is configured to be counted. Note that this continuation bit is 1-bit data, and the checksum is 4-bit data, so eight 1" signals are always obtained. The carry output of octal counter 5 is sent to CPU 2 and CPU 2.
It is supplied to the R differentiation circuit 6. And depending on this the CPU
2 stops the output of the signal BH, and the output pulse of the CR9 division circuit 6 is applied to each reset input terminal R of the counter 7 and the SR type flip-flop 8 to set the respective reset states. Counter 7 counts clock CP,
This is a counter provided to measure a predetermined time 2, for example, 1 second. The carry output is applied to the set input terminal S of the flip-flop 8, and the set output of the flip-flop 8 is applied to the AND gate 1 as a gate control signal.

Next, the operation of the above embodiment will be explained. Digital information from the card @ At the beginning of reading, flip-flop 8
is in the set state, and therefore AND gate 1 is open. For this reason, the read digital information is sent to the CPU
2 and AND gate 8. The necessary digital information is then transferred to the RAM via the CPU 2. During Otako, the signal BE is 0'', and the AND gate 8
is being developed.

Next, when the end code is read, the CPU 2 outputs the signal BE.
is output as '1', and the AND gate 8 is subsequently opened. Then, when eight '1' level signals are read by the continuation bit and checksum, the 1' signal is output from the AND gate 8, and the OR gate 8 is opened. It is supplied to an octal counter 5 via a differentiating circuit 4 and counted. And the count value is rI
JJ2. J.

When the carry signal is outputted at the timing when the value changes to "0", the carry signal is applied to the counter 7 and flip-flop 8 via the OR differentiation circuit 6, respectively, to reset each of them.

Then, the counter 7 starts counting time for 2 seconds, for example, 1 second, and during this time, the AND gate 1 is closed, so that even if the barcode reader reads any information, it will not be input to the CPU 2 and will be ignored. . Furthermore, when one second has elapsed, a carry signal is output from the counter 7, and the flip-flop 8
is set. Therefore, the set output (1
”), the AND gate 1 will be opened from now on and it will be possible to read the next line or the barcode of another card.Here,
The above value of 1 second means that when scanning with a barcode reader,
This is obtained by considering the time from the end of the barcode to the start of the next line.

Next, a second embodiment will be described with reference to FIG.

Note that circuits having the same functions as those in FIG. 1 are given the same reference numerals, and their explanations will be omitted.

That is, the output of the AND gate 1 is further connected to the inverter 11.
It is applied to the reset input terminal R of the 8R flip-flop 18 via the CR differentiation circuit 12. The signal BE is applied to the set input terminal S of the flip-flop 1B via the CR and differential input terminals 14. The set output is given to the AND gate 16 as a gate control signal. This AND gate 15 has a clock C
P is applied, and the clock CP output from the AND gate 15 is input to a counter 16 and counted.

The clock CP is also applied to an AND gate 18 via a 1/N frequency divider 17. Also, the above octal counter 6
The carry output of is applied to the set input terminal S of the 7-lip flop 19, and the set output thereof is applied to the AND gate 18 as a gate control signal.

The 1/N frequency-divided signal output from the AND gate 18 is applied to the counter 20. It is counted. Further, each count output of the counters 16 and 20 is both fed to a coincidence circuit 21 to detect a coincidence, and its -dispersed output is 5Rfi.
It is applied to the set input terminal of the flip-flop 22 and to the reset input terminal of the flip-flop 70 and the reset input terminal 19. The set output of the flip-flop 22 is used as a gate control signal for the AND gate 1. Note that the counter 16 is reset by the signal BE passed through the differentiating circuit 14, and the counter 20 and flip-flop 22 are both reset by the output of the differentiating circuit 6.

Next, the operation of the second embodiment will be explained. When starting to read digital information from the card.

Flip-flop 22 is in the set state and therefore AND gate 1 is open. Therefore, the read digital information is transferred to the CPU2. And gate 8. are provided to the inverters 11, respectively.

Then, the necessary digital information is further transferred from the CPU2 to the RA.
Sent to M. Also, during this time, the signal BE is 0'',
AND gate 8 is closed.

Next, when the end code is read, the CPU 2 outputs a signal BE of 1'' and opens the AND gate 8. Also, the output of the C differential circuit 14 causes the flip-flop 18 to open.
is set, and at the same time, the counter 16 is set to a reset state, and in response to this, the counter 16 starts counting the clock CP via the game controller 15. and,
An output is generated from the inverter 11 in synchronization with the fall of the continuation bit ((3) in FIG. 8(α)) signal. and C
The flip-flop 1B is reset via the R differentiation circuit 12. As a result, the AND gate 15 is closed and the counter 16 is closed.
The counting operation stops. In other words, the counter 16 counts a count value corresponding to the time when the continuation bit is scanned. Therefore, if the scanning speed of the barcode reader is fast, the counted value will be small, and conversely, if the scanning speed of the barcode reader is slow, the counted value will be large.

On the other hand, the opened AND gate 8. Eight 1" level signals from the continuation bit and checksum are input to the octal counter 5 and counted via the C carry circuit 4. When the count value becomes "0", a carry signal is output. , the flip-flop 19 is set, and the counter 20 and the flip-flop 22 are simultaneously reset by the output of the CR differentiation circuit 6. Therefore, from now on, input of read data by the barcode reader via the AND gate 1 is prohibited.

On the other hand, the set i of the flip-flop 19, the clock CP frequency-divided to t/N is applied to the counter 20 via the AND gate 18 and counted. Then, the counting output is compared with the counting output of the counter 16 in the coincidence circuit 21, and when the two match, a coincidence signal is output, and the flip-flop 2
2 is set.

In response to this, the AND gate 1 is opened again to prepare for reading the barcodes of the secondary rows and other cards.

As explained above, in the case of this second embodiment.

For a time corresponding to the scanning speed of the barcode reader,
After reading the necessary information, input of read data from the barcode reader is prohibited. In other words, if the scanning speed of the barcode reader is fast, the input prohibition time will be short, and conversely, if the scanning speed is slow, the input prohibition time will be long.

Note that the length of time during which input of read data from the barcode reader is prohibited is not limited to those of the various embodiments described above.
Optional.

Further, the form of the barcode is not limited to the above embodiment, and the format of the information may be changed as appropriate.

As described above, the present invention provides a barcode input device that prohibits the input of read information from a barcode reader until a predetermined period of time has elapsed after the completion of reading of necessary information. After reading the necessary information, the barcode reader closes and protrudes from the card to read dirt on the desk, or even if a dirt is read on the card, this F-data is not input.

Therefore, there is an advantage that the occurrence of errors can be reliably prevented. Also, if the barcode display is provided over multiple lines on one card, even if a dummy code is provided at the end of each line to make each line the same length, this dummy code will not be input as data. .

Therefore, there is also the advantage that the appearance of power to de looks better.

Furthermore, even if the margin space is made smaller, errors will not occur for the reasons mentioned above, so the amount of information that can be written on one card increases accordingly, which also has the advantage of being economical.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a main part of a first embodiment of the present invention. FIG. 2 is a circuit diagram of the main part of the second embodiment, and FIG. 8 is a diagram showing the contents of the end code etc. near the end of the bar code display body in each of the above embodiments. 1.8, 15.18...and gate, 2...CP
U. 4.6,12,14...CR9 circuit, 5,7,16
゜20... Counter, 8, 18, 19.22... Flip 4-tube, 17... 1/N frequency divider, 21...
matching circuit. Patent applicant Casio Computer Co., Ltd.

Claims (1)

[Claims] When a series of barcode information is read in a barcode input device that uses a barcode reader to read and input the above information from a medium on which predetermined barcode information is written, a predetermined period of time elapses from the end of reading. A barcode input device comprising: a timer for measuring time; and a means for prohibiting input of read data from the barcode reader until the timer reaches the predetermined time.