JPH0652343A - Bar code reader device - Google Patents

Abstract

PURPOSE:To accelerate reading speed while avoiding misreading. CONSTITUTION:Two bar code readers 1A and 1B are used. Data read by the first bar code reader 1A are transmitted to the second bar code reader 1B by a communication circuit 7 and stored in a RAM 6. Data read by the second bar code reader 1B are compared with the data stored in the RAM 6 and when the data are coincident the required number of times at both of first and second bar code readers 1A and 1B, the data are outputted from the second bar code reader 1B to an external equipment 10 as read data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bar code reader device for reading bar codes.

[0002]

2. Description of the Related Art Conventionally, in order to avoid erroneous reading, an automatic reading type bar code reader scans the same bar code a plurality of times and confirms that the same data has been read a plurality of times, and then the reading is completed to the outside. I was outputting data.

[0003]

In such a conventional method, the bar code scanning range passable time is determined by the bar code reader scanning time and the data decoding time, so that one bar code reader can be used. If the barcode passing speed is so high that the same data cannot be obtained the required number of times, the reading speed (bar code passing speed) cannot be improved even if the number of barcode readers is increased. there were.

The present invention has been provided in view of the above points, and provides a bar code reader device for improving reading speed while avoiding erroneous reading.

[0005]

According to the present invention, a plurality of bar code readers for sequentially reading bar codes are provided, and each bar code reader has a communication means for transmitting bar code data with another bar code reader. And a comparison matching determination means for comparing the barcode data with another barcode data, and if the barcode reader in the subsequent stage matches the data for a predetermined required number of times, the barcode reader outputs it as read data. It was done like this.

Further, according to a second aspect of the present invention, there is provided a shared comparison / coincidence determination device for determining data based on data from a plurality of barcode readers.

[0007]

According to the present invention, the passage time of a barcode can be shortened to a speed at which one barcode reader can read once while avoiding erroneous reading. That is, the line speed can be increased, and the reading speed can be improved while avoiding erroneous reading. Also,
By increasing the number of bar code readers, it is possible to improve the reading rate for smearing, chipping, bleeding, etc. of bar code printing without reducing the line speed.

Further, according to the present invention, since a common comparison / coincidence judging device for judging data based on data from a plurality of bar code readers is provided, a general bar code reader can be diverted and the cost can be reduced. It can be downsized.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. In the present invention, a communication function is provided between bar code readers so that data read as a bar code even once by one bar code reader can be shared as read data by a plurality of bar code readers.

Further, by using a plurality of bar code readers, the data read at least once in the first bar code reader is transmitted to the second bar code reader to be read next, and the data is transmitted to the second bar code reader. The data read by the barcode reader is compared in the second barcode reader,
If there is a required number of data matches in total in the first and second bar code readers, the second bar code reader outputs the data as read data to an external device.

A detailed description will be given below. FIG. 1 shows an overall block diagram, in which two bar code readers 1 are shown.
The case where A and 1B are installed will be described. Both the bar code readers 1A and 1B have the same structure, and are composed of a bar code scanner 2, an amplifier 3, an A / D converter 4, a decoding circuit 5, a RAM 6, a communication circuit 7, a comparison coincidence judging circuit 8 and the like. There is. Further, the external device 10 outputs data as read data from the second barcode 1B. The external device 10 is, for example, a computer, a program controller, or the like.

Next, the operation will be described. Figure 1 is the first
3 is a flowchart of the operation of the barcode reader 1A, and FIG. 3 is a flowchart of the operation of the second barcode reader 1B. First, as shown in FIGS. 1 and 2, after synchronizing input in the bar code scanner 2,
Start the laser scan and read the barcode image. The analog bar image signal from the bar code scanner 2 is amplified by the amplifier 3. Next, the amplified analog bar image signal is binarized by the A / D converter 4 and input to the decoding circuit 5.

In the decoding circuit 5, judgment and coding (bar code data 1) are carried out by a bar code table, and the coded bar code data 1 is stored in a RAM.
Store at 6. Then, the barcode data 1 is transmitted to the second barcode reader 1B by the communication circuit 7. Next, in the second barcode reader 1B, as shown in FIG. 3, the barcode data 1 from the first barcode reader 1A is received by the communication circuit 7, and this barcode data 1 is stored in the RAM 6. .

Then, the same bar code is read by the second bar code reader 1B, coded by the decoding circuit 5 to form bar code data 2, and the bar code data 2 is stored in the RAM 6. The comparison match determination circuit 8 of the second barcode reader 1B determines the comparison match between the barcode data 1 and the barcode data 2. If the barcode data 1 and the barcode data 2 match, the communication circuit 7 transmits the barcode data as read data to the external device 10.

With this configuration, if it is difficult to obtain the required number of times for the first and second bar code readers 1A and 1B due to stains on the bar code, missing prints, bleeding, etc., Further, it is possible to increase the number of bar code readers and determine the coincidence with the final bar code reader. (Embodiment 2) FIG. 4 shows Embodiment 2, in which a plurality of, in this embodiment, two bar code readers 1 are provided, and comparison judgment of one or more read data outputs from each bar code reader 1 is performed. The comparison matching determination device 11 is provided.

In this embodiment, the external comparison and coincidence determination device 1
At 1, the bar code data from each bar code reader 1 is compared and determined to be coincident, and is output to the external device 10.
The bar code reader in this case may be the bar code reader shown in FIG. 1 or a conventional bar code reader.

[0017]

As described above, the present invention is provided with a plurality of bar code readers for sequentially reading bar codes, and each bar code reader is provided with a communication means for transmitting bar code data to another bar code reader. And a comparison matching determination means for comparing the barcode data with another barcode data, and if the barcode reader in the subsequent stage matches the data for a predetermined required number of times, the barcode reader outputs it as read data. Thus, the bar code passage time can be shortened to the speed at which one bar code reader can read once while avoiding erroneous reading. That is, the line speed can be increased, and the reading speed can be improved while avoiding erroneous reading. In addition, by increasing the number of bar code readers, it is possible to improve the reading rate for smearing, chipping, bleeding, etc. of bar code printing without reducing the line speed.

According to the second aspect of the present invention, since a common comparison / match determination device for determining data based on data from a plurality of bar code readers is provided, a general bar code reader can be diverted and the cost can be reduced. It can be downsized.

[Brief description of drawings]

FIG. 1 is an overall block diagram of an embodiment of the present invention.

FIG. 2 is a flowchart showing an operation of the first barcode reader of the above.

FIG. 3 is a flowchart showing an operation of the second barcode reader of the above.

FIG. 4 is a block diagram of another embodiment of the above.

[Explanation of symbols]

 1A 1st barcode reader 1B 2nd barcode reader 7 Communication circuit 8 Comparison matching determination circuit

Claims (2)

[Claims] 1. A plurality of bar code readers for sequentially reading bar codes are provided, and each bar code reader has a communication means for transmitting bar code data to another bar code reader, and the bar code data read and the other bar code. It is characterized in that it is provided with a comparison coincidence judging means for comparing with the code data, and if the bar code reader at the subsequent stage matches the data of a predetermined necessary number of times, the bar code reader outputs the read data as read data. Bar code reader device. 2. The bar code reader device according to claim 1, further comprising a shared comparison and coincidence judging device for judging data based on data from a plurality of bar code readers.