Four-unit bar and blank crossed bar code and application of four-unit bar and blank crossed bar code

Abstract

The invention discloses a four-unit bar and blank crossed bar code and an application method of the four-unit bar and blank crossed bar code, and aims at improving the one-dimensional bar code density. Particularly, a data character string width unit even parity check character is adopted, the error reading can be avoided, in addition, four groups of bar and blank crossed units of each pair of characters can express the states or the serial numbers of 256 questions, the bar code density is improved, when the four-unit bar and blank crossed bar code is used for selecting answer bar codes, the question serial number quantity requirement of normal answer sheets can be met through one pair of data, and when the length of a selected answer frame is not greater than eight, the length is marked by three units including a blank, a bar and a blank in front of a stop character, and the bar code length is further reduced; the selected answer bar codes can be used for various written selective answer sheet or questionnaire occasions, the answer frame full-filling information can be fast collected by a bar code gun, a mobile phone, a scanner or a cursor card reader, and the question serial number and the answer selection are recorded; the four-unit bar and blank crossed bar code and the method are particularly suitable for the fast paper reading by teachers, the exam results of students in each time are collected, recorded, counted and analyzed, and the full record in the whole life is realized.

Description

technical field [0001] The invention discloses a barcode with intersecting bars and spaces and an application method thereof, in particular to a barcode whose data characters are composed of 4 units, the intersecting bars and spaces are used for character coding, and can be used to select the barcode for answering questions. Involves bar code, printing, written examination, data acquisition and other fields. Background technique [0002] There are many formats of 1D barcodes, which are widely used in many different situations, each with its own advantages and disadvantages. Recent patent application: a barcode with optional answer function and its application (application number: 201310468859.0), the barcode part adopts the existing barcode, and the data code is used as the serial number character of the optional answer question. Since the optional answer barcode is printed on the answer sheet corresponding to each question, the density requirement is higher, and there need...

AI Technical Summary

Problems solved by technology

Since the optional answer barcode is printed on the answer sheet corresponding to each question, the density requirement is higher, and there needs to be sufficient number of question serial numbers. units, each pair of blank cross characters can represent a maximum of 100 question serial numbers, and it cannot mark the length of the answer box, so it is inconvenient to use in some occasions with a large number of answers.

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