Barcode scanners are an essential part of the supermarket's cash registers. How to match a good barcode scanner with a good cash register? Xiaohuo brother came to teach you how to choose a barcode scanner.
Barcode scanners have several important parameters that everyone should pay attention to, and this is also an identification point for the scan gun:
1. Resolution For bar code scanning systems, the resolution is to correctly detect the width of the narrowest stripe read. English is MINIMAL BAR WIDTH (abbreviated as MBW). When selecting a device, it is not the higher the branching rate of the device. The scanner with the corresponding resolution should be selected according to the bar code density used in the specific application. In use, if the resolution of the selected device is too high, the stain on the bar, deinking, etc. will have a more serious impact on the system.
2. Scan Width The scan width index refers to the physical length value of the bar code information that can be read by the scanning beam at a given scanning distance.
3. Scanning Depth of Field Scanning Depth of Field refers to the difference between the farthest distance that the scanning head allows to leave the surface of the barcode and the closest distance of the barcode scanner to the surface of the barcode, that is, the effective operation of the barcode scanner, while ensuring reliable reading. range. Some bar code scanning devices do not give a scanning depth of field indicator in the technical index, but give a scanning distance, that is, the shortest distance that the scanning head allows to leave the bar code surface.
4. Scanning speed Scanning speed refers to the scanning frequency of the scanning beam on the scanning track per unit time.
5. One recognition rate The first recognition rate indicates the ratio of the number of labels read in the first scan to the total number of scanned labels. For example, if the information for each barcode label is scanned twice, the recognition rate is 50%. From the practical point of view, of course, I hope that every scan can pass, but unfortunately, due to a variety of factors, it is impossible to achieve a recognition rate of 100%.
6. Bit Error Rate The bit error rate is an extremely important test indicator that reflects the misidentification of a machine-identifiable tag system. The bit error rate is equal to the ratio of the number of false recognitions to the total number of recognitions. For a bar code system, the bit error rate is a more serious problem than the low recognition rate.
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