JPH03164884A - Handy type bar code scanner - Google Patents

Abstract

PURPOSE:To always grasp whether reading is correctly executed or not by providing first and second optical read parts, processing part to collate binary signals to be respectively outputted from these read parts, and output part to output one of collated results at least. CONSTITUTION:When an arbitrary bar code is read, first and second optical read parts 1a and 1b read reflected light from the same bar code at slightly different timing, convert the light to electric signals corresponding to respective levels, convert the signals to the binary signals of a serial form by comparison with a threshold value and transfers the signals to a processing part 2. The processing part 2 collates the binary signals of the serial form sent from the first and second optical read parts 1a and 1b while compensating the deviation of the timing each other. When the collated results are dissident, the read binary signals are not sent to a host device but an output part 5 displays the generation of erroneous reading or generates a signal tone. Thus, erroneous reading is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a handy barcode scanner used in PO8 terminals and the like.

(Prior art) In a handheld barcode scanner used in PO8 terminals, etc., barcodes that display product codes, etc. are read by an optical reader, transferred to a host device, and processed into data indicating sales status. Saved.

(Problems to be Solved by the Invention) Conventionally, such handheld barcode scanners have a problem in that misreading is likely to occur because scanning is performed manually.

(Means for Solving the Problems) The handy barcode scanner of the present invention reads reflected light from a barcode and outputs a binary signal according to the level of the reflected light. It includes a second optical reading section, a processing section that collates the binary signals output from these optical reading sections, and an output section that outputs at least one of the verification results.

Therefore, the user can be aware of the occurrence of erroneous reading, and can effectively prevent the input of erroneous data by re-reading or the like.

Hereinafter, the operation of the present invention will be explained in detail together with examples.

(Embodiment) FIG. 1 is a block diagram showing the configuration of a handy barcode scanner according to an embodiment of the present invention.
b is the first. In the second optical reading section, 2 is a processing section, 3 is a host device interface section, 4 is a signal line, and 5 is an output section.

The first optical reading section 1a and the second optical reading section 1b are
When reading any barcode, it reads the reflected light from the same barcode at slightly different timings, converts it into an electrical signal according to its level, and converts it into a serial format 2-sulfur code by comparing it with the dark value. and transfers it to the processing section 2.

The processing unit 2 includes a first . The serial format two sulfur numbers transferred from the second optical reading sections 1a and 1b are compared while compensating for mutual timing differences. In the case of a match/failure, the processing section 2 sends the read serial format 2-sampler code to the host device via the host device interface section 3 and the signal line 4, and also outputs a match result to the output section 5. display or generate a signal sound.

On the other hand, if the matching results do not match, the processing unit 2
Without sending the read 2 sulfur number to the upper device,
The output unit 5 displays a message indicating that an erroneous reading has occurred,
Generate a signal sound.

A user who is aware of the occurrence of this misreading error can effectively prevent misreading by performing another scan and repeating the verification.

The above has exemplified a configuration in which the matching result is output to the output unit both when the matching result is a match and when the matching result is a mismatch.

However, a configuration may also be adopted in which an alarm is output only when the matching rate is a failure, or a confirmation sound is generated only when there is a matching match.

Further, the present invention has been exemplified in the case of a hand-held barcode scanner that collates the read two-letter barcode numbers and, if they match, transfers the two-barcode numbers in the serial format to the host device. However, the present invention can also be applied to cases where this 2-sulfur body number is compared with a registered barcode pattern, converted into a parallel data identification code, and transferred to a host device or stored in a built-in memory. . In this case, the two sulfur numbers may be checked at the stage of serial data, or after conversion to parallel data.

(Effects of the Invention) As described in detail above, the handy barcode scanner of the present invention has the following advantages: Since the configuration includes a second optical reading section, a processing section that collates the 2-sulfur body number output from each of these optical reading sections, and an output section that outputs at least one of the verification results, the user can read the You can always know whether something has been done correctly or not.

As a result, in the case of erroneous reading, the input of erroneous data can be effectively prevented by re-reading.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a handy barcode scanner according to an embodiment of the present invention. la...first optical reading section, 1b...second optical reading section, 2...first optical reading section. 2. Processing unit that verifies the sulfur number output from the second optical reading unit, 3... Host device interface unit, 4... Signal line, 5... Processing unit 2.
Output section that outputs the matching results.

Claims (1)

[Claims] 2 that reads the reflected light from the barcode and according to its level.
The apparatus includes first and second optical reading sections that output value signals, a processing section that collates the binary signals output from these optical reading sections, and an output section that outputs at least one of the verification results. A hand-held barcode scanner that is characterized by: