JPS60159976A - Bar code reading device - Google Patents

Abstract

PURPOSE:To enable the titled device to read even when bar codes of various systems are mixed by discriminating the system of the bar code by a scanning beam, storing it in a code system setting circuit, reading the code by the command and decoding it to the set code system. CONSTITUTION:Bar code stuck on a running body is detected by a laser beam projected from a laser scanner 1, and thesignal is encoded in a soft processing section 3 through a data fetching circuit 2. On the other hand, each code system is set beforehand in a code system setting circuit 4, and at the same time, each code system is distinguished by coding. When a code system is designated by a command from the soft processing section 3, this is stored, and the command is given to a code reading circuit 5, and decoding is made by this code system. After completion of this processing, signals received by the data taking in circuit 2 can be transmitted directly to the code reading circuit 5 by switching a switching device 6.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention relates to the configuration of a barcode reading device whose scope of application has been expanded.

(b) Technical Background Barcodes accurately display a large amount of information, which is automatically read using an optical system and processed by a computer.
) + Used in various fields such as inventory management and logistics.

Here, the barcode displays various information using a barcode symbol consisting of a black bar, a white bar, and a margin, and has the advantage that the number of digits, size, shape, etc. can be arbitrarily selected depending on the purpose.

Therefore, various barcode systems have been put into practical use depending on the purpose.

(c) Prior art and problems Regarding the use of barcodes, in terms of logistics, goods with barcodes attached are transported by a belt conveyor, but at this stage the barcodes cannot be read by a laser scanner. Processing such as sorting is being carried out.

Here, the barcode systems include UPC system and NWT system.

2 out of 5 series, Code 39 series, Inter
There are various barcode reading devices such as 1eaved2outof5 series, and the number of digits and the number of bits constituting a character differ depending on the type, so barcode reading devices are manufactured according to each system.

Therefore, when using barcode readers to manage and sort logistics, it is limited to items that use barcodes of the same system, and when items with barcodes and labels of multiple systems are mixed together. There was a problem that it could not be used.

(d) Purpose of the Invention An object of the present invention is to provide a barcode reading device that is capable of distinguishing and reading even when articles to which barcodes of various systems are affixed coexist.

(e) Structure of the Invention The object of the present invention is to provide a device for reading information by scanning a barcode affixed to an article using a laser scanner. This can be achieved by storing the code in the code system setting circuit, operating the code reading circuit according to instructions from the code system setting circuit, and decoding the read code into the code system set in the code system setting circuit.

(f) Embodiments of the Invention The present invention provides a code system discrimination circuit in parallel with a conventional code reading circuit, detects the bar code system being used, instructs the code reading circuit as to the code system to be used, and then The barcode reading process is performed in the same way as before.

The figure is a block diagram of a barcode reading device embodying the present invention. In this embodiment, a barcode affixed to an object placed on a conveyor belt is scanned at a predetermined position by a laser scanner. A signal detected by the laser beam projected from the laser beam passes through the data acquisition circuit 2 and is encoded in the software processing section 3.

On the other hand, each code system is set in advance in the code system setting circuit 4, each code system is encoded and identified, and when a code system is specified by a command from the software processing section 3, it is stored. The code reading circuit 5 is instructed to perform decoding processing using this code system.

After this processing is completed, the switch 6 may be switched so that the signal received by the data acquisition circuit 2 is directly transmitted to the code reading circuit 5.

In the figure, an area 7 surrounded by a dotted line is a block diagram of a barcode reader equipped with a code system detection circuit according to the present invention.

(g) Effect of the invention Currently, barcodes are used to record various information.
Bar code systems that read out optically and process bar codes using computers are widely used, but different code systems are used depending on the application or manufacturer.

Since each reading device uses a dedicated device, it has the disadvantage that it cannot be used if barcodes with different code systems are mixed, but by implementing the present invention, these problems can be solved and the range of applications can be expanded. Become.

[Brief explanation of drawings]

The figure is a block diagram of a barcode reading device implementing the present invention. In the figure, 2 is a data acquisition circuit, and 3 is a software processing section.

Claims (1)

[Claims] In a device that reads information by scanning a barcode affixed to an article with a laser scanner, the system of the barcode is determined by a scanning beam emitted from the laser scanner and stored in a code system setting circuit, and the code system is stored in a code system setting circuit. A barcode reading device characterized in that a code reading circuit operates according to instructions from a setting circuit to decode the read code into a code system set in the code system setting circuit.