JPH0498584A - Bar code reader - Google Patents

Abstract

PURPOSE:To improve operability by outputting match information of check digits based on left side decoding data and right side decoding data to read data of plural JAN code labels. CONSTITUTION:Six kinds of scan 33-38 are prepared for the scan of a two-stage JAN code consisting of an upper stage label 31 and a lower stage label 32. In such scan, when left half decoding data '2012345' by the scan 34, right half decoding data '678903' by the scan 35, left half decoding data '2101445' by the scan 37, and right half decoding data '825512' by the scan 38 are obtained, four kinds of synthetic data can be generated. Separation information 1 is attached on the output format of the data as shown in figure. The separation information 1 is set as 'B' when correction/error is indiscriminable, and is used as an alarm for an operator when display is performed. When the correction/error is discriminable, the separation information 1 is set as 'A'.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a barcode reading device.

[Conventional technology]

To read a single JAN code label using a conventional barcode reading device, as shown in FIG. The decoding is performed by scanning up to the guard par 21 at once. Or from left guard par 21 to center par 2 by scanning 24
The left half decoding data "1012345" obtained by scanning the left half symbols up to 3 and the right half decoding data "6789" obtained by scanning the right half symbols from the right guard par 22 to the center bar 23 by scanning 25.
04'' and verifying the check digit.

Next, when reading multiple JAN code labels at the same time, as shown in FIG.
The reading of the two-stage JAN code symbol composed of the lower label 32 and the lower label 32 will be described. In this case, similar to the reading of the JAN single code symbol shown in Figure 2,
Regarding the upper label 31, the batch decoding data "2012345678903" is obtained by operation 33, the left half decoding data is "2012345" by scanning 34, the right half decoding data "678903" is obtained by scanning 35, and the lower label 32 is decoding by scanning 36. Data “21
01445825512'' The left half decoded data "2101445" by scanning 37 and the right half decoded data "'825512" by scan 38 are synthesized by the decoding section in the barcode reading device, and the check digits are verified. In addition, the data “2012
345678903” and “210144582551
2'' does not need to be synthesized, and after verifying the check digit, the barcode reading device outputs the reading result to the external device.

[Problem to be solved by the invention]

However, if no bulk data is obtained and only the decoded data of the left and right halves corresponding to the left half symbol or the right half symbol are available, it is necessary to perform synthesis. In this case, the combined data will be of the following four types.

Synthetic data 1: 2012345678903 Synthetic data 2: 2012345825512 Synthetic data 3: 2
1014456789031014456F8903 Here, the check digit is verified, but synthetic data 1
, 2, 3, and 4 all pass the check digital check, making it impossible to find the correct combination.

That is, if the right half data and left half data of the upper level and lower level are exchanged and the check digits match, it is impossible to synthesize only the decoded data of the left and right halves. Therefore, the operator must input label information from the keyboard. Furthermore, two-tiered labels have the disadvantage that they have twice the amount of information than normal single-tiered labels, which reduces operability.

[Means to solve the problem]

The present invention reads multiple JAN code labels at the same time,
In the no code reading device that outputs the reading results of each label, in addition to the reading results of each label, a code reading device that outputs the reading results of each label is based on the left side decoding data and the right side decoding data corresponding to the left side symbol and right side symbol constituting each label. It has a function to output check digit matching information.

〔Example〕

Next, the present invention will be explained using the drawings.

FIG. 1 is a diagram showing an embodiment of the present invention. In this embodiment, a two-stage JAN code label shown in FIG. 3 will be described as an example of a multi-stage label. As mentioned above, the composite data of the left and right half decoded data 4 is: Composite data 1: 201234567890B Composite data 2: 2012345825512 Composite data 3
: 21014456789031014456fu8
903, in which the correct decrypted data is a combination of composite data 1 and 4, but it is impossible to find the correct combination by check digit checking. In this case, according to the present invention, the composite data is read in the format shown in FIG. 1 and output to the external device as a read result, but the first half is an incorrect read result and the second half is a correct read result. Also, “B” is used as distinction information 1.
' indicates that there are four sets of synthetic data that passed the check digit check. Then, a reading start code 2 and a reading end code 3 are added before and after the composite data. In the case of a two-tier label, there are usually two combinations of composite data that pass the check digit check of the composite data, and in this case, the discrimination information 1 is 'A'. Even when it is possible to discriminate, the discrimination information 1 becomes "A", and two types of combined data are output to the external device as the reading results.

Therefore, the operator can determine whether the read result is correct or incorrect based on the discrimination information added to the composite data output to the external device, and can immediately correct erroneous data.

〔Effect of the invention〕

As explained above, the present invention does not make the composite data unreadable even when it is impossible to verify the composite data by checking the check digit, but outputs composite data with distinguishing information added, thereby leaving the judgment to the operator. It becomes possible. Therefore, the operator who receives the notification can compare the information displayed on the display etc. with the scanned product.
In the case of incorrect information, it can be corrected to correct read data9. For example, the incorrect read data shown in FIG.
2012345825512:21014456789
03” is the correct read data “’2012345678
903:2101445825512''. In other words, it is possible to construct a barcode reading system with significantly improved scanning speed compared to the conventional method of inputting from a keyboard.

1... Read data start code, 2... Distinction information,
3... Read data end code.

Claims (1)

[Claims] In a barcode reading device that simultaneously reads a plurality of JAN code labels and outputs the reading results of each label, a check digit based on left decoding data and right decoding data corresponding to the left symbol and right symbol constituting each label, respectively. 1. A barcode reading device, comprising: means for outputting matching information.