CN206472211U - Bar code scanner based on phase-detection - Google Patents
Bar code scanner based on phase-detection Download PDFInfo
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- CN206472211U CN206472211U CN201720195705.2U CN201720195705U CN206472211U CN 206472211 U CN206472211 U CN 206472211U CN 201720195705 U CN201720195705 U CN 201720195705U CN 206472211 U CN206472211 U CN 206472211U
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Abstract
The utility model provides a kind of bar code scanner based on phase-detection, including to being tested the pick-up lens unit of bar code image, the driver element to control pick-up lens unit focal length variations, to by the imaging sensing unit of the tested bar code formation digital picture of pick-up lens unit photographs, phase difference in image planes of the phase detection unit where to detect imaging sensing unit between 2 points is to generate shifted signal.Processing unit is used to generate focus control signal according to the shifted signal.Control unit is used to control driver element driving pick-up lens unit to complete the auto-focusing to being tested bar code according to the focus control signal.Decoding unit is used to be tested the first image progress bar code decoding that bar code is obtained according to the pick-up lens unit photographs completed after auto-focusing.The utility model is applicable to treat that swepting slip code high-speed motion and scanning means need the scene minimized.
Description
Technical field
The utility model is related to bar code scan field, more particularly to a kind of bar that rapid focus is realized by phase-detection
Code scanning means.
Background technology
At present, bar code scanner is widely used in the fields such as super business, logistics, industry identification.The reality of bar code scan technology
Existing mode is generally based on digital image acquisition and the mode of processing, and the bar code shadow for being identified thing is gathered by digital camera original paper
Picture, by image procossing and decoding, is identified as the data signal that computer can directly receive.
Excellent bar code scanner must have enough picture image taking capabilities, be used for bar code solution to provide clearly image
Code.It in many scenes that bar code scan is applied, can quickly recognize that bar code is very crucial, and quickly recognize that the bottleneck of bar code is past
It is past to be that bar code scanner quickly precisely focus to obtain clearly barcode image to identified thing.
Utility model content
For above-mentioned technical problem, the utility model provide it is a kind of can quickly realize auto-focusing based on phase-detection
Bar code scanner.
A kind of bar code scanner based on phase-detection of the present utility model is included to be taken the photograph to tested bar code image
Driver element as lens unit, to control pick-up lens unit focal length variations, to by the quilt of pick-up lens unit photographs
Survey imaging sensing unit, phase detection unit, processing unit, control unit and the decoding unit of bar code formation digital picture.
Phase detection unit it is integrally disposed in imaging sensing unit on, phase detection unit to detect imaging sensing unit where picture
Phase difference on face between 2 points is to generate shifted signal.Processing unit distinguishes data cube computation in imaging sensing unit and phase inspection
Unit is surveyed, processing unit is used to generate focus control signal according to the shifted signal.Control unit distinguishes data cube computation in place
Unit and driver element are managed, control unit is used to control driver element driving pick-up lens unit according to the focus control signal
Complete the auto-focusing to being tested bar code.Decoding unit data cube computation is in processing unit, and decoding unit is used to automatic according to completing
Defocused pick-up lens unit photographs are tested with the first image progress bar code decoding that bar code is obtained.
It is preferred that phase detection unit includes the pixel group of the partial pixel displacement by sensing unit is imaged.Enter one
Step ground, phase detection unit includes being arranged at the shadow shield with opening in front of the photographic department of imaging sensing unit.
It is preferred that the bar code scanner based on phase-detection also includes memory cell, data cube computation is single in processing respectively
Member and decoding unit, the memory cell is to store described first image.
It is preferred that driver element is closed loop motor.
It is preferred that the bar code scanner based on phase-detection also includes floor light unit, with pick-up lens unit simultaneously
Row is neighbouring to be set.Further, the bar code scanner based on phase-detection also include ambient light sensing unit, processing unit in
Floor light unit is opened in control when the light intensity of ambient light sensing unit detection is less than preset value.
Compared with prior art, the bar code scanner of the present utility model based on phase-detection passes through phase detection unit
The offset detected and offset direction, realize the rapid focus of image unit in bar code scanner, so that bar code scan
Device is rapidly completed bar code identification, is particularly suitable for use in treating that swepting slip code high-speed motion and scanning means need the scene minimized.
Brief description of the drawings
Fig. 1 is the schematic diagram of the bar code scanner based on phase-detection of the embodiment of the utility model one.
Fig. 2 is the fundamental diagram of the phase detection unit of the embodiment of the utility model one.
Fig. 3 is the schematic diagram of the bar code scanner based on phase-detection of the another embodiment of the utility model.
Fig. 4 is the flow chart of the bar code scanning method based on phase-detection of the embodiment of the utility model one.
Embodiment
To make to have further understanding to the purpose of this utility model, construction, feature and its function, hereby coordinate embodiment
Describe in detail as follows.
Incorporated by reference to referring to Fig. 1 and Fig. 2, Fig. 1 fills for the bar code scan based on phase-detection of the embodiment of the utility model one
Put 1 schematic diagram, Fig. 2 for the embodiment of the utility model one phase detection unit fundamental diagram.Based on phase-detection
Bar code scanner 1 is included to the pick-up lens unit 11 to being tested the imaging of bar code 2, to control pick-up lens unit 11 burnt
The imaging that driver element 12 away from change, the tested bar code pick-up lens unit 11 to be shot form digital picture senses list
Member 21, integrally disposed phase detection unit 22, processing unit 30, control unit 40 and decoding on imaging sensing unit 21
Unit 50.Phase difference in image planes of the phase detection unit 22 where to detect imaging sensing unit 21 between 2 points is to generate
Shifted signal.Processing unit 30 distinguishes data cube computation in imaging sensing unit 21 and phase detection unit 22, and processing unit is used to
Focus control signal is generated according to the shifted signal.Control unit 40 distinguishes data cube computation in processing unit 30 and driver element
12, control unit 40 is used to control the driving pick-up lens of driver element 12 unit 11 to complete to quilt according to the focus control signal
Survey the auto-focusing of bar code.The data cube computation of decoding unit 50 is in processing unit 30, and decoding unit 50 is used to automatic right according to completing
Defocused pick-up lens unit 11 shoots the first image progress bar code decoding that tested bar code 2 is obtained.
Offset and offset direction information are contained in the shifted signal that phase detection unit 22 is generated, according to these information
It can determine whether how pick-up lens focuses to complete auto-focusing.Phase-detection of the present utility model is from imaging sensing
The relative paired pixel in left and right is taken out on unit, the detection of the information such as light-inletting quantity is carried out to being tested bar code respectively, by comparing
The correlation situation of the left and right sides, accurate focusing will be found out rapidly, rear drive unit will be disposably by camera lens
The focus adjustment of head unit to complete focusing.By taking the light path principle figure shown in Fig. 2 as an example, it is assumed that pick-up lens unit 11 in Fig. 2
It is unpunctual when focusing and the situation that light path is represented using solid line is accurate as focusing, there are two kinds of possibility, one kind is camera lens focus tested
Before bar code, situation about being represented in such as Fig. 2 with round dot dotted line now needs to adjust to the right camera lens to change focal length, another to be
Camera lens focus is after tested bar code, and situation about being represented in such as Fig. 2 with the dotted line that breaks now needs to adjust camera lens to the left to change
Focal length；It should be noted that the specific regulative mode of focal length of pick-up lens unit 11 of the present utility model is not limited thereto.
In one embodiment, phase detection unit 22 includes the picture of the partial pixel displacement by sensing unit 21 is imaged
Plain group.In actual applications, imaging sensing unit 21 can be ccd array.Further, phase detection unit 22 includes setting
The shadow shield 221 with opening in front of the photographic department of imaging sensing unit 21.Being so designed that need not pass with imaging
The phase detecting module that sensor is independently arranged, beneficial to the miniaturization of bar code scanner.
In one embodiment, the bar code scanner 1 based on phase-detection also includes memory cell (not shown), counts respectively
According to processing unit 30 and decoding unit 50 is connected to, memory cell is to store described first image.
Preferably, driver element 12 is closed loop motor, the speed of focus adjustment can be further speeded up, so as to accelerate bar code
The execution speed of scanning.
Fig. 3 is referred to, Fig. 3 illustrates for the bar code scanner 3 based on phase-detection of the another embodiment of the utility model
Figure.In this embodiment, the bar code scanner 3 based on phase-detection except the element in above-described embodiment it, it is in addition to auxiliary
Help lighting unit 60, floor light unit 60 and the neighbouring setting side by side of pick-up lens unit 11.Further, based on phase-detection
Bar code scanner 3 also include ambient light sensing unit 70, the light intensity that processing unit 30 is detected in ambient light sensing unit 70
Floor light unit 60 is opened in control during less than preset value.Preferably due to which requirement of the phase-detection to ambient light is higher, to keep away
Exempt from unnecessary time waste, the ability open phase only when the light intensity that ambient light sensing unit 70 is detected is not less than the preset value
Detection unit 22.
Fig. 4 is referred to, Fig. 4 is the flow of the bar code scanning method based on phase-detection of the embodiment of the utility model one
Figure.The bar code scanning method based on phase-detection is comprised the steps of.
S1, obtains tested bar code using phase detection unit and passes through between 2 points in image planes during pick-up lens cell imaging
Phase difference, to generate shifted signal.
S2, focus control signal is generated according to the shifted signal.
S3, drives the pick-up lens unit to complete the auto-focusing to being tested bar code according to the focus control signal,
And shoot the first image of the tested bar code acquisition.
S4, the decoding of tested bar code is carried out according to described first image.
The bar code scanning method for being preferably based on phase-detection is further comprising the steps of：The light intensity of ambient light is detected, and is worked as
The light intensity of detection opens floor light when being less than preset value.Requirement due to phase-detection to ambient light is higher, for avoid need not
The time wanted wastes, and only just opens the phase detection unit when the light intensity of detection is not less than the preset value.
The concrete operating principle being had been mentioned when bar code scanner is described above is not repeated herein.
The offset that bar code scanner of the present utility model based on phase-detection is detected by phase detection unit
And offset direction, the rapid focus of image unit in bar code scanner is realized, so that bar code scanner is rapidly completed bar
Code identification, is particularly suitable for use in treating that swepting slip code high-speed motion and bar code scanner need the scene minimized.
The utility model is been described by by above-mentioned related embodiment, but above-described embodiment is only implementation the utility model
Example.It must be noted that, the embodiment disclosed is not limiting as scope of the present utility model.On the contrary, not departing from this
The change and retouching made in the spirit and scope of utility model, belong to scope of patent protection of the present utility model.
Claims (7)
1. a kind of bar code scanner based on phase-detection, it is characterised in that including：
To the pick-up lens unit to being tested bar code image；
Driver element to control the pick-up lens unit focal length variations；
Imaging sensing unit the tested bar code of the pick-up lens unit photographs to be formed to digital picture；
Phase detection unit, it is integrally disposed in it is described imaging sensing unit on, the phase detection unit to detect it is described into
Phase difference in image planes as where sensing unit between 2 points is to generate shifted signal；
Processing unit, data cube computation is in the imaging sensing unit and the phase detection unit respectively, and the processing unit is used
To generate focus control signal according to the shifted signal；
Control unit, data cube computation is in the processing unit and the driver element respectively, and described control unit is used to according to institute
Stating focus control signal controls the driver element to drive the pick-up lens unit to complete the auto-focusing to being tested bar code；With
And
Decoding unit, data cube computation is used to according to the shooting completed after auto-focusing in the processing unit, the decoding unit
Lens unit shoots the first image progress bar code decoding that tested bar code is obtained.
2. the bar code scanner as claimed in claim 1 based on phase-detection, it is characterised in that the phase detection unit
Including the pixel group for replacing the partial pixel of the imaging sensing unit.
3. the bar code scanner as claimed in claim 2 based on phase-detection, it is characterised in that the phase detection unit
Including the shadow shield with opening being arranged in front of the photographic department of the imaging sensing unit.
4. the bar code scanner as claimed in claim 1 based on phase-detection, it is characterised in that also including memory cell, point
Other data cube computation is in the processing unit and the decoding unit, and the memory cell is to store described first image.
5. the bar code scanner as claimed in claim 1 based on phase-detection, it is characterised in that the driver element is to close
Ring type motor.
6. the bar code scanner as claimed in claim 1 based on phase-detection, it is characterised in that also including floor light list
Member, with the pick-up lens unit neighbouring setting side by side.
7. the bar code scanner as claimed in claim 6 based on phase-detection, it is characterised in that also including sensing environment light
Unit, the processing unit control when light intensity that the ambient light sensing unit is detected is less than preset value is opened the auxiliary and shone
Bright unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720195705.2U CN206472211U (en) | 2017-03-02 | 2017-03-02 | Bar code scanner based on phase-detection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720195705.2U CN206472211U (en) | 2017-03-02 | 2017-03-02 | Bar code scanner based on phase-detection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110390222A (en) * | 2019-07-09 | 2019-10-29 | 江苏安方电力科技有限公司 | A kind of cabinet body class goods and materials image-forming information automated collection systems |
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2017
- 2017-03-02 CN CN201720195705.2U patent/CN206472211U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110390222A (en) * | 2019-07-09 | 2019-10-29 | 江苏安方电力科技有限公司 | A kind of cabinet body class goods and materials image-forming information automated collection systems |
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Effective date of registration: 20181116 Address after: 215121 A1 605, Ting LAN lane, Suzhou Industrial Park, Suzhou, Jiangsu, 605 Patentee after: Suzhou Mobi inton Intelligent System Co., Ltd. Address before: 215000 Wujiang Economic and Technological Development Zone, Suzhou City, Jiangsu Province, on the east side of Chang'an Road, on the southwest side of the 8th floor of Building A of Wujiang Science and Technology Pioneering Park Patentee before: SUZHOU MOBILEAD ELECTRONIC TECHNOLOGY CO., LTD. |
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