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Bar-code scanner and photoelectric signal processing circuit thereof

A barcode scanner and processing circuit technology, applied in the field of electrical signal processing, can solve problems such as low barcode recognition accuracy, and achieve the effects of improving recognition accuracy, improving accuracy, and solving low recognition accuracy

Active Publication Date: 2015-03-25
SHENZHEN NETCOM ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a photoelectric signal processing circuit of a barcode scanner, aiming to solve the problem of low barcode recognition accuracy existing in existing barcode scanners

Method used

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  • Bar-code scanner and photoelectric signal processing circuit thereof
  • Bar-code scanner and photoelectric signal processing circuit thereof
  • Bar-code scanner and photoelectric signal processing circuit thereof

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Embodiment Construction

[0017] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0018] In the embodiment of the present invention, by adopting a photoelectric signal processing circuit of a barcode scanner including a peak sampling module, a voltage divider module, a level judgment module and a magnification control module, the photoelectric conversion module can output errors due to signal interference. When using electrical signals, the signal amplification factor of the secondary amplification module is adaptively adjusted according to the change of the output voltage of the secondary amplification module, so as to timely adjust the input voltage signal of the hysteresis ...

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Abstract

The invention is suitable to be used in the field of photoelectric signal processing, and provides a bar-code scanner and a photoelectric signal processing circuit thereof. The photoelectric signal processing circuit of the bar-code scanner comprises a peak sampling module, a partial pressure module, a level determining module, and an amplification factor module. When a photoelectric conversion module outputs an electric signal with errors because of signal interference, the photoelectric signal processing circuit can self-adaptively adjust a signal amplification factor of a second-grade amplification module according to changing conditions of output voltage of the second-grade amplification module, so as to adjust input voltage signals of a hysteresis comparison output module, and precision of decoding signals output by the hysteresis comparison output module is improved. Thus, identification accuracy for bar codes is improved, and thereby solving a problem of low bar code identification accuracy existed in an existing bar-code scanner.

Description

technical field [0001] The invention belongs to the field of electrical signal processing, in particular to a barcode scanner and a photoelectric signal processing circuit thereof. Background technique [0002] Currently, barcode scanners are widely used in the field of product management as a device for reading item identification information. The existing barcode scanner emits light from its internal light source, and the light is irradiated onto the barcode through the optical system, and then the reflected light is imaged on the photoelectric converter by the optical system, and the electrical signal is generated by the photoelectric converter, and then the The electrical signal is amplified by the amplifier circuit to generate a corresponding analog voltage, and then the analog voltage is filtered and shaped to obtain a corresponding square wave signal, and finally the square wave signal is analyzed into a digital signal by a decoder and input to the computer interface....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K7/10H03K17/56
Inventor 程振钟衍徽
Owner SHENZHEN NETCOM ELECTRONICS CO LTD
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