The new driver's license has an anti-counterfeiting film and barcode. The first two code provinces of the barcode, the third digit is the check digit, and the last ten digits are the serial number. Each driver's license has a separate number.

"In particular, for the first time, a barcode has been added to the card core to record the information of the issued driver's license. In the future, new driver's licenses will be digitally managed. This 13-digit barcode will be used in driver's license management and traffic order. It plays a huge role in management.

If someone loses his driver's license, after applying for a new driver's license through the normal process, the number occupied by the old driver's license will be marked as invalid, even if the old driver's license does not have the word "invalid" printed on it. In fact, it has been marked as invalid through the barcode, and the new driver's license will get a new number. In the past, some drivers applied for a new driver's license because they could not find the original driver's license.

There are also some drivers who deliberately apply for driver's licenses and use them with two license plates, causing interference to traffic management. Now, with the digital management technology of barcodes, drivers can effectively prevent the behavior of holding two or more certificates. When front-line police find suspicious driver's licenses during management, they can accurately determine which license plate is valid through the barcode.

Another function of the barcode is that the Ministry of Public Security will record the core of each document. Once a fake document appears, it will be passed. Barcode for traceability.

Supplementary information:

Identification principle:

The width of the white bar and the black bar are different, and the duration of the corresponding electrical signal is also different. p>

However, the electrical signal corresponding to the barcode and space output by the photoelectric converter is generally only about 10mV and cannot be used directly, so the electrical signal output by the photoelectric converter must first be sent to an amplifier for amplification.

The electrical signal is still an analog electrical signal. In order to avoid error signals caused by defects and stains in the barcode, a shaping circuit needs to be added after the amplification circuit to convert the analog signal into a digital electrical signal so that the computer system can accurately interpret it.

The pulse digital signal of the shaping circuit is converted into digital and character information by the decoder. It identifies the encoding system and scanning direction of the barcode symbol by measuring the pulse digital electrical signals 0 and 1. The number of bars and spaces is determined by measuring the duration of the 0 and 1 signals to determine the width of the bars and spaces.

In this way, the barcode to be read is obtained. According to the number and space of symbols, the corresponding width and the encoding system used, the barcode symbols can be replaced with corresponding numeric and character information, and sent to the computer system through the interface circuit for data processing and management. , thereby completing the entire process of barcode reading.

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