JJG 979-2003 English PDF

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JJG 979-2003: Verification Regulation of Bar Code Verifiers
Status: Valid

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Basic data

Standard ID: JJG 979-2003 (JJG979-2003)
Description (Translated English): Verification Regulation of Bar Code Verifiers
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A52
Word Count Estimation: 18,195
Date of Issue: 2003-03-05
Date of Implementation: 2003-06-01
Quoted Standard: GB 12904-1998; GB/T 12905-2000; GB/T 12907-1991; GB/T 16829-1997; JJF 1001-1998
Issuing agency(ies): State Administration of Quality Supervision, Inspection and Quarantine
Summary: This standard applies to the quantitative detection of one-dimensional bar code detector for initial verification and follow-up test.

JJG 979-2003: Verification Regulation of Bar Code Verifiers

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Verification Regulation of Bar Code Verifiers National Metrology Verification Regulations of the People's Republic Bar code detector Released on.2003-03-05 2003-06-01 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine on March 5,.2003, and Implemented on June 1,.2003. Focal Point. National Geometric Length Measurement Technical Committee Drafting unit. National Bar Code Quality Supervision and Inspection Center This regulation entrusts the National Geometric Length Measurement Technical Committee to explain The main drafters of this procedure. Xiong Liyong (National Bar Code Quality Supervision and Inspection Center) Wu Hailian (National Bar Code Quality Supervision and Inspection Center) Wang Yingchun (National Bar Code Quality Supervision and Inspection Center)

table of Contents

1 Scope (1) 2 Citations (1) 3 terms (1) 3.1 Standard reflector (1) 3.2 strip/empty width standard (1) 3.3 Qualified barcode symbol samples (1) 3.4 X size (1) 4 Overview (1) 4.1 Use and basic principles (1) 4.2 Level (2) 5 Metrological performance requirements (3) 5.1 Reflectance error of indication (3) 5.2 Repeatability of reflectivity (3) 5.3 Stability of reflectivity (3) 5.4 bar/empty width indication error (4) Repeatability of 5.5 strips/space width (4) 5.6 strip/empty width stability (4) 6 General technical requirements (4) 6.1 Appearance (4) 6.2 Computer Performance (4) 6.3 Display and Printing (4) 7 Measuring instrument control (4) 7.1 Verification conditions (4) 7.2 Verification project (5) 7.3 Verification method (6) 7.4 Processing of verification results (7) 7.5 Verification cycle (8) Appendix A Format of the Certificate/Verification Result Notice (9) Appendix B Verification Record Format (10) Bar code detector verification procedure

1 Scope

This procedure is applicable to the first verification and subsequent verification of the one-dimensional barcode detector for quantitative detection.

2 Citations

This procedure refers to the following documents. GB 12904-1998 Product barcode GB/T 12905-2000 bar code terminology GB/T 12907-1991 Kudba barcode GB/T 16829-1997 Interleaving two or five barcodes JJF1001-1998 General measurement terms and definitions When using this procedure, care should be taken to use the current valid version of the above cited documents.

3 terms

3.1 standard reflector The reflectance value of the working plane is calibrated to reproduce the reflectance magnitude of the physical gauge. 3.2 strip/empty width standard The strip/empty width value of the bar code symbol made on the plate is calibrated to reproduce the strip/empty width value of the object Measuring tool. 3.3 Qualified barcode symbol samples The printed quality conforms to the bar code symbol of the relevant bar code standard or technical specification. 3.4 X size The nominal size of the narrowest strip/empty width in the bar code symbol.

4 Overview

4.1 Use and basic principles Bar code detector is an instrument for checking the quality of bar code symbols. It mainly measures the strip/empty reflectivity of bar code symbols and Strip/empty width. The strip/empty reflectance measurement range is 2% ≤ R ≤ 99%; the strip/empty width measurement range is usually 0.127 mm ≤ D ≤ 5.700 mm. According to the scanning method, the barcode detector can be divided into two types. mechanical displacement scanning and electronic displacement scanning. The former package It includes a stylus type, an automatic mechanical type, and a laser gun type; the latter has a CCD (Charge Coupled Device) type. Bar code detectors are usually composed of photoelectric scanners, auxiliary length measuring devices and computers, as shown in Figure 1. By sweep The light beam emitted by the light source is illuminated on the bar code symbol, sequentially moved through each strip, and is reflected by the bar code symbol. reflection The light is projected onto the photoelectric converter via the optical system and converted into an electrical signal. During the scanning process, the intensity of the reflected light varies with each The strip/empty reflectivity changes, and the size of the corresponding electrical signal also changes. The magnitude and reflectivity of the electrical signal become ......

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