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Camera-based code reader and method of calibrated manufacturing the same

A code reader and camera technology, applied in the direction of instruments, computer parts, electromagnetic radiation induction, etc., can solve the problem of high system weight, achieve high calibration accuracy, lower cost, and improve flexibility

Inactive Publication Date: 2016-01-20
SICK AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Finally in known solutions the system weight is very high due to the large number of handover points, for example about 20 kg per camera and associated lighting unit

Method used

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  • Camera-based code reader and method of calibrated manufacturing the same
  • Camera-based code reader and method of calibrated manufacturing the same
  • Camera-based code reader and method of calibrated manufacturing the same

Examples

Experimental program
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Embodiment Construction

[0041] figure 1 A code reader 10 is shown mounted above a conveyor belt 12 on which objects 14 are conveyed through an acquisition area 18 of the code reader 10 as indicated by arrow 16 . The object 14 carries a code field 20 on its outer surface. The tasks of the code reader 10 are: to identify the code field 20; to read the code displayed thereon; to decode; and, to classify the object 14 to which each code belongs.

[0042] The code region 20 can only be recognized by the code reader 10 when the code region 20 is arranged on the upper surface or is at least visible from above. figure 1 The illustrated plurality of code readers 10 , which can be used for irregularly reading codes 22 arranged on the side or under an object, are mounted from different directions, so that so-called omnidirectional reading can be performed from all directions. Arranging a plurality of code readers 10 to form a reading system is in practice mostly realized as a reading tunnel.

[0043] as in ...

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Abstract

The present invention relates to camera-based code readers and methods of calibrated manufacturing such code readers. A camera-based code reader (10) having an image sensor for registering a scanline in a linear read field (18); an illumination unit (28, 30) for illuminating the read field (18) An evaluation unit (46), configured to synthesize sequentially recorded scan lines into an image; and a decoding unit (48), used to find and decode code information in the image. Also provided is an elongated substrate (26) having a plurality of individual image sensors (32) mounted thereon, each individual image sensor (32) comprising a linear individual reading area (18a-d) and together form an image sensor, by orienting and arranging these individual image sensors relative to each other, the individual reading areas (18a-d) are superimposed into a linear reading area (18), wherein the evaluation unit (46) is also formed as Image data from individual image sensors (32) are combined into scan lines.

Description

technical field [0001] The invention relates to a camera-based code reader having an image sensor for recording a linear reading field of a scanning line and a production method for the calibrated production of the camera-based code reader. Background technique [0002] The most popular code reader is a barcode scanner, which uses a laser reading beam to traverse the code across the code to scan a barcode (Barcode) or a barcode (Strichcode). The barcode scanner is often used in supermarket checkout counters, automatic package identification, mail sorting or airport baggage check-in and other logistics applications. With the further development of digital photography technology, more and more barcode scanners are replaced by camera-based code readers. Instead of scanning the code area, a camera-based code reader captures images of the object with the code located on the object by means of a CCD chip, and image evaluation software (Bildauswertungssoftware) extracts the code i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K7/10
CPCG06K7/10712G06K7/14Y10T29/49002
Inventor 拉尔夫·乌尔里克·尼布林克里斯托夫·安泽尔门特
Owner SICK AG
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