Mobile bar code scanning device with variable light supplementing intensity and scanning method

Abstract

The invention provides a mobile bar code scanning device with variable light supplement intensity and a scanning method. The mobile bar code scanning device comprises a PDA host module and a code scanning module assembled with the PDA host module in a matched mode. A light supplement lamp is arranged on the code scanning module, a photosensitive sensor, a control unit and a variable current sourceunit are arranged on the PDA host module, the photosensitive sensor is electrically connected with the control unit, the input end of the variable current source unit is electrically connected with the control unit, and the output end of the variable current source unit is electrically connected with the light supplement lamp. The control unit controls the output current value of the variable current source unit to the light supplement lamp according to the focal length of the code scanning module and the ambient light intensity detected by the photosensitive sensor. The photosensitive sensoris used for detecting the illumination intensity in an application scene, the control unit is used for controlling the output current value of the variable current source unit according to the focallength of the module and the detected illumination intensity, then the light supplementing intensity of the light supplementing lamp is adjusted, and power consumption of equipment is reduced while bar code scanning is guaranteed.

Description

technical field [0001] The invention relates to the technical field of barcode scanning, in particular to a mobile barcode scanning device and a scanning method with variable supplementary light intensity. Background technique [0002] PDA (Personal Digital Assistant), also known as handheld computer, can help us realize work, study, entertainment, etc. on the move. Classified by use, PDA can be divided into industrial grade PDA and consumer PDA. Industrial-grade PDAs are mainly used in the industrial field. Equipped with different functional modules according to different usage requirements, they can become mobile devices suitable for different applications, such as mobile barcode scanners, RFID readers, cash register POS machines, etc. [0003] With the rapid development of big data and the Internet of Things industry, barcode scanners have been widely used as a very convenient data collection device, and mobile barcode scanning devices that combine barcode scanning modul...

AI Technical Summary

Problems solved by technology

[0004] At present, when the scanning module of the mobile barcode scanning device combined with the PDA is scanning the code, it generally needs to use the supplementary light for supplementary light to facilitate scanning; however, the current supply current of the existing supplementary light is fixed. The intensity of the supplementary light is also fixed, and the supplementary light generally works at the rated power, especially in order to take into account the barcode scanning and reading in the dark lighting environment, the current of the supplementary light is generally set relatively high; When scanning codes in a sufficient scene, it often does not need too strong fill light intensity. Therefore, in this case, the power consumption of the fill light will be wasted, which will affect the battery life of the PDA.

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