CN116415608A - Scanning device and light supplementing lamp control method thereof - Google Patents
Scanning device and light supplementing lamp control method thereof Download PDFInfo
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- CN116415608A CN116415608A CN202310456243.5A CN202310456243A CN116415608A CN 116415608 A CN116415608 A CN 116415608A CN 202310456243 A CN202310456243 A CN 202310456243A CN 116415608 A CN116415608 A CN 116415608A
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- 238000005516 engineering process Methods 0.000 description 2
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10712—Fixed beam scanning
- G06K7/10722—Photodetector array or CCD scanning
- G06K7/10752—Exposure time control
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10712—Fixed beam scanning
- G06K7/10722—Photodetector array or CCD scanning
- G06K7/10732—Light sources
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention provides a scanning device, a light supplementing lamp control system and a light supplementing lamp control method thereof, wherein the scanning device comprises: a scan engine for capturing images and at least two light-compensating lamps for illuminating when the scan engine captures images. The light filling lamp control system includes: the light supplementing control unit is used for controlling at least two light supplementing lamps to emit light; an exposure control unit for controlling the exposure time of the scanning engine; the main control unit is connected with the light supplementing control unit and is used for controlling at least two light supplementing lamps to alternately emit light through the light supplementing control unit and controlling the exposure time of the scanning engine to be smaller than the single-time light emitting time of the light supplementing lamps through the exposure control unit. The bar codes are respectively irradiated from a plurality of different angles through a plurality of indicator lamps which alternately emit light, so that the influence of reflected light is reduced, and the decoding success rate is improved.
Description
The divisional application is a divisional application of a Chinese patent application with the application date of 2018, 11, 15 and the application number of 202010774090.5 and the name of a 'light supplementing lamp control method of a scanning device'; the chinese patent application with application number 202010774090.5 is a divisional application of chinese patent application with application number 201811356795.4, entitled "scanning device, light-compensating lamp control system and control method thereof", with application number 2018, 11, 15.
Technical Field
The present invention relates to a light compensating lamp control system and method for a scanning device, and more particularly to a light compensating lamp control system and method for improving decoding efficiency of a scanning device.
Background
In the bar code scanning industry, when the illumination intensity of natural light or indoor fluorescent lamps cannot meet the requirement of an imaging system of bar code reading equipment on the illumination intensity, a practitioner usually adopts an additional light source to supplement light to the bar code to be read.
In the first industry, a single point light source is mostly adopted for light filling, and later, in order to achieve a better light filling effect, a plurality of point light sources are gradually changed to perform light filling at the same time. However, in the light supplementing mode of a single point light source or a plurality of point light sources, certain reflected light can be generated to influence the reading of the bar code, and particularly, when the bar code on the smooth surface such as a metal surface or a glass surface is read, the influence of the reflected light is obvious, so that the bar code cannot be read.
The present invention addresses the above problems by providing a new system and method for controlling a light-compensating lamp of a scanning device.
Disclosure of Invention
Aiming at the problems faced by the background technology, the invention aims to provide a scanning device, a light supplementing lamp control system and a control method thereof, which respectively irradiate bar codes from a plurality of different angles through a plurality of indicator lamps which alternately emit light, reduce the influence of reflected light and improve the decoding success rate.
In order to achieve the above purpose, the invention adopts the following technical means:
a light supplement lamp control system for a scanning device, the scanning device comprising: a scan engine for capturing images and at least two light-compensating lamps for illuminating when the scan engine captures images; the light filling lamp control system includes:
the light supplementing control unit is used for controlling at least two light supplementing lamps to emit light;
an exposure control unit for controlling the exposure time of the scanning engine;
the main control unit is electrically connected with the light supplementing control unit and is used for controlling at least two light supplementing lamps to alternately emit light through the light supplementing control unit;
the main control unit is also respectively and electrically connected with the scanning engine and the exposure control unit, and is used for controlling the exposure time of the scanning engine to be smaller than the single light emitting time of each light supplementing lamp through the exposure control unit.
And the main control unit is further used for controlling each light supplementing lamp to emit light in a gradual change mode in brightness within single light emitting time through the light supplementing control unit.
Further, when the light emission time lengths of at least two of the light supplement lamps are the same and the light emission times are staggered, so that one of the light supplement lamps stops emitting light, the other light supplement lamp starts emitting light.
Further, the number of the light supplementing lamps is four, the four light supplementing lamps are oppositely arranged on two sides of the scanning engine in pairs, and the light emitting time of the two light supplementing lamps in the same pair is synchronously set.
And the main control unit is further used for controlling the scanning engine to acquire two or more frames of images in the light emitting time of each light supplementing lamp through the exposure control unit.
Further, the scanning device is provided with a housing for accommodating the scanning engine, the housing is provided with a scanning window and two light supplementing windows respectively positioned at two sides of the scanning window, the scanning engine is exposed to the scanning window, at least two light supplementing lamps comprise a first light supplementing lamp arranged at one of the light supplementing windows, at least two light supplementing lamps comprise a second light supplementing lamp arranged at the other light supplementing window, and the light emitting modes of the first light supplementing lamp and the second light supplementing lamp are different.
Further, the wavelength band or color of the illumination light emitted by one of the light-compensating lamps is different from the wavelength band or color of the illumination light emitted by the other light-compensating lamp.
Further, one of the light supplementing lamps emits white light, and the other light supplementing lamp emits monochromatic light.
The invention provides a light supplementing lamp control method of a scanning device, which comprises the following steps: a scan engine for capturing images, a first light supplement lamp and a second light supplement lamp for illuminating when the scan engine captures images; wherein the method comprises the following steps:
A. controlling the first light supplementing lamp to emit light;
B. adjusting the exposure time of the scanning engine to be smaller than the light emitting time of the first light supplementing lamp;
C. at least one frame of image is collected in the light emitting time of the first light supplementing lamp;
D. decoding an image acquired by the scan engine;
E. judging whether the decoding is successful or not; and F, stopping light supplementing when the decoding is successful, and executing the step F when the decoding is unsuccessful;
F. controlling the first light supplementing lamp to stop lighting and controlling the second light supplementing lamp to light;
G. adjusting the exposure time of the scanning engine to be smaller than the light emitting time of the second light supplementing lamp;
H. at least one frame of image is collected in the light emitting time of the second light supplementing lamp;
I. decoding an image acquired by the scan engine;
J. and D, judging whether the decoding is successful, if so, stopping light supplementing, and if not, controlling the second light supplementing lamp to stop light emitting and repeatedly executing the steps A to J.
Further, the step a specifically includes: controlling the first light supplementing lamp to emit light gradually from dark to light or from light to dark; the step F specifically comprises the following steps: and controlling the second light supplementing lamp to emit light gradually from dark to light or from light to dark.
Further, the light emitting time of the first light supplementing lamp and the light emitting time of the second light supplementing lamp are controlled to be longer than the exposure time of the scanning engine, and the scanning engine is enabled to collect two frames or more than two frames of images in the light emitting time of the first light supplementing lamp or the light emitting time of the second light supplementing lamp.
Further, the illumination light bands emitted by the first light supplement lamp and the second light supplement lamp are different or different in color.
Further, the first light supplementing lamp emits white light, and the second light supplementing lamp emits monochromatic light.
The invention provides a scanning device, which is characterized by comprising: the system comprises a scanning engine for acquiring images, a light supplementing lamp arranged on one side of the scanning engine for illuminating when the images are acquired, and a light supplementing lamp control system for controlling the light supplementing lamp;
the light filling lamp control system includes:
the light supplementing control unit is used for controlling the light supplementing lamp to emit light;
an exposure control unit for controlling the exposure time of the scanning engine;
the main control unit is used for analyzing and decoding the image;
the main control unit is respectively and electrically connected with the scanning engine, the light supplementing control unit and the exposure control unit, and is used for controlling the brightness of the light supplementing lamp to emit light in a periodical gradual change mode through the light supplementing control unit, controlling the exposure time of the scanning engine through the exposure control unit, and matching the exposure time of the light supplementing lamp so that the scanning engine can perform multiple exposure in one light emitting period of the light supplementing lamp.
Further, the light supplementing lamp is a first light supplementing lamp; the scanning device is further provided with a second light supplementing lamp arranged on the other side of the scanning engine, and the light emitting modes of the first light supplementing lamp and the second light supplementing lamp are different.
Further, the brightness of the second light supplementing lamp is periodically and gradually changed to emit light, and the light emitting period is staggered with the light emitting period of the first light supplementing lamp.
Further, the illumination light bands emitted by the first light supplement lamp and the second light supplement lamp are different or different in color.
Compared with the prior art, the invention has the following beneficial effects:
at least two light supplementing lamps are controlled by a light supplementing control unit to alternately emit light, multiple illumination angles are provided for illumination of the bar code to be read, when reflected light generated by one light supplementing lamp affects bar code reading, images collected under illumination of the light supplementing lamps at other positions can be identified, influence of the reflected light is reduced, and the success rate of bar code reading is improved.
Drawings
FIG. 1 is a block diagram of a light filling lamp control system for controlling a scanning device according to a first embodiment of the present invention;
fig. 2 is a perspective view of a scanning device according to a first embodiment of the present invention;
FIG. 3 is a perspective view of the scan engine of FIG. 2;
FIG. 4 is an exploded view of FIG. 3;
FIG. 5 is a schematic diagram of another view of FIG. 3;
FIG. 6 is a cross-sectional view taken along the direction A-A in FIG. 5;
FIG. 7 is a schematic diagram of the scanning device of FIG. 2 scanning a bar code;
FIG. 8 is a light emission cycle chart of a light supplement lamp of the scanning device according to the first embodiment of the invention;
FIG. 9 is a block diagram of a light filling lamp control system for controlling a scanning device according to a second embodiment of the present invention;
FIG. 10 is a perspective view of a scanning device according to a second embodiment of the present invention;
FIG. 11 is a perspective view of the scan engine of FIG. 10;
FIG. 12 is an exploded view of FIG. 11;
FIG. 13 is a light emission cycle chart of a light supplement lamp of the scanning device according to the second embodiment of the present invention;
fig. 14 is a flowchart of a method for controlling a light supplement lamp of a scanning device according to the present invention.
Reference numerals of the specific embodiments illustrate:
scanning device 100: a housing 1; a scan engine 2; a terminal 3; a front plate 4; a rear plate 5; a first light supplementing lamp 6; a second light supplementing lamp 7; a light homogenizing sheet 8; a concave lens 81; a lens 9; a third light supplementing lamp 10; a scanning window 11; a light supplementing window 12; illumination light L; a bar code B; light filling lamp control system 200: a light supplementing control unit 201; an exposure control unit 202; a master control unit 203.
Detailed Description
For a better understanding of the invention with objects, structures, features, and effects, the invention will be described further with reference to the drawings and to the detailed description.
Fig. 1 is a block diagram of a light supplement lamp control system 200 of a scanning device according to the present invention. Fig. 2 is a perspective view of the scanning device of the present invention. Fig. 3 is a perspective view of the scan engine of fig. 2. Fig. 4 is an exploded view of fig. 3.
As shown in fig. 1-4, the scanning device 100 has a substantially square housing 1, a substantially rectangular scanning window 11 is provided at a front end of the housing 1, a length direction of the scanning window 11 is set along a horizontal direction, the scanning device 100 further has a substantially rectangular scanning engine 2 accommodated in the housing 1, and four light compensating lamps (6, 7) are respectively provided at four corners of the scanning engine 2.
As shown in fig. 1, the light-compensating lamp control system 200 includes: a light-compensating control unit 201 for controlling the light emission of the light-compensating lamps (6, 7); an exposure control unit 202 for controlling the exposure time of the scan engine 2, and a main control unit 203 electrically connected to the scan engine 2, the light compensation control unit 201, and the exposure control unit 202.
Specifically, as shown in fig. 3 and 4, the scan engine 2 further includes a front plate 4 and a rear plate 5, which are electrically connected to each other through terminals 3 and are respectively disposed on the front and rear sides of the scan engine 2.
The front plate 4 is rectangular, four corners of the front plate are respectively provided with one light supplementing lamp (6, 7), and the light supplementing lamps (6, 7) can be surface-mounted LED lamps. In the present embodiment, the four light-supplementing lamps (6, 7) are divided into a pair of first light-supplementing lamps 6 and a pair of second light-supplementing lamps 7 according to the left and right sides, and are controlled by the two light-supplementing control units 201 integrated on the front plate 4, respectively.
The first light compensating lamp 6 and the second light compensating lamp 7 emit illumination light with different wavebands or different colors, for example, the first light compensating lamp 6 emits monochromatic light with one color of red light, green light or blue light for illumination, and the second light compensating lamp 7 emits monochromatic light with the other color of red light, green light or blue light for illumination, so that the illumination light with one color can improve the contrast of the bar code B, reduce the contrast of the background where the bar code B is located, and improve the recognition success rate of the bar code B.
For example, when a metal lattice bar code (not shown) etched on a green circuit board (not shown, the same applies below) needs to be read, if green illumination light is adopted for illumination, as the circuit board and the metal lattice bar code both reflect green illumination light back, the contrast difference between the circuit board and the metal lattice bar code is small, the bar code is easy to be read, and if red illumination light is adopted, the contrast of the bar code can be improved; in this embodiment, it is preferable that the first light supplement lamp 6 emits white light, and the second light supplement lamp 7 emits monochromatic red light; in other embodiments, the first light compensating lamp 6 and the second light compensating lamp 7 may be designed to emit monochromatic light of other colors according to the different material surfaces of the bar code B.
Referring to fig. 6 and 7, a light homogenizing sheet 8 is disposed on the front plate 4 and located in front of the four light compensating lamps (6, 7) and has the same length and width as the front plate 4, and a concave lens 81 is concavely formed on each of four corners of the light homogenizing sheet 8 toward one side of the light compensating lamps and corresponds to the four light compensating lamps (6, 7).
The concave lens 81 is matched with the light homogenizing sheet 8 to uniformly disperse the illumination light L emitted by the light supplementing lamps (6, 7), so that the influence of local overexposure is reduced, and the illumination is improved by artificially designing the focus of the concave lens 81 to enable the illumination light L emitted by the first light supplementing lamp 6 or the second light supplementing lamp 7 to overlap at the position where the bar code B is located.
The lens 9 is arranged on the front plate 4 and the light homogenizing sheet 8 in a protruding mode and is positioned at the center of the four light supplementing lamps (6 and 7) for collecting bar code images.
The scan engine 2 converts the bar code image into a digital signal and transmits the digital signal to the main control unit 203 through the rear panel 5. The main control unit 203 analyzes and decodes the digital signal of the bar code image.
Specifically, the light-compensating lamp control system 200 controls the light-compensating lamps (6, 7) by the following method flow.
As shown in fig. 1, the main control unit 203 writes the light emission signals of a pair of the first light compensating lamps 6 into one of the light compensating units 201, the light compensating unit 201 adjusts and controls the output power of the first light compensating lamps 6 through PWM technology to realize that the first light compensating lamps 6 gradually emit white illumination light from dark to light or from light to dark (as shown in fig. 8), and controls the on/off of the first light compensating lamps 6 by controlling the light emission time thereof.
Meanwhile, the main control unit 203 controls the scan engine 2 to start collecting bar code images, and controls the frame period of the scan engine 2 through the exposure control unit 202 integrated on the rear panel 5, so as to control the exposure time of the scan engine 2, so that the light emitting time of the first light compensating lamp 6 is several times of the frame period of the scan engine 2. In a preferred embodiment, the light emission time may be four times the frame period.
Thus, the scanning engine 2 can acquire four barcode images within the light emitting time of the first light supplement lamp 6. Because the brightness of the first light supplementing lamp 6 changes gradually, the brightness of the four barcode images also changes gradually, and when the brightness of one barcode image is proper and the influence of the reflected light is not obvious, the one barcode image can be successfully decoded by the main control unit 203, so that the reading efficiency of the barcode B is improved.
When none of the four frame images can be successfully decoded due to the influence of the reflected light, the main control unit 203 will continue to control the pair of first light compensating lamps 6 to stop lighting, and the main control unit 203 will control the pair of second light compensating lamps 7 to start lighting through the other light compensating control unit 201.
The second light-compensating lamp 7 emits red illumination light (as shown in fig. 8) from dark to light or from light to dark, the light-emitting time is the same as the light-emitting time of the first light-compensating lamp 6, and the scanning engine 2 will collect barcode images with four frames of different brightness within the light-emitting time of the second light-compensating lamp 7.
Because the illumination angles of the second light supplementing lamp 7 and the first light supplementing lamp 6 are different, when the reflected light generated by the illumination light L emitted by the first light supplementing lamp 6 affects the reading of the bar code B, the reflected light generated by the illumination light L emitted by the second light supplementing lamp 7 can not affect the reading of the bar code B due to the change of the angle, and the success rate of the reading of the bar code B is improved.
Of course, if the decoding is still unsuccessful, the user can adjust the scanning angle by a small margin and re-execute the control method flow by the control system until the decoding is successful.
The pair of first light supplementing lamps 6 and the pair of second light supplementing lamps 7 in the present embodiment are respectively disposed on the left and right sides of the scan engine 2.
In other embodiments (not shown), a pair of the first light compensating lamps 6 may be disposed left to right, and a pair of the second light compensating lamps 7 may be disposed left to right.
In other embodiments, the four light-compensating lamps (6, 7) can emit light independently one by one, and form a horse race lamp type light-emitting mode around the lens 10. Alternatively, four of the light-supplementing lamps (6, 7) may also take a mode in which one or more of the light-supplementing lamps (6, 7) emit light randomly without conforming to a fixed law. The number of the light supplement lamps (6, 7) can be set to two, three or other numbers as required, and the light emitting mode can be referred to as the above mode.
In the present embodiment, the light compensation control unit 201 and the exposure control unit 202 are integrated on the front plate 4 and the rear plate 5. In other embodiments, the light compensation control unit 201 and the exposure control unit 202 may be integrated on the motherboard simultaneously with the main control unit 203.
In this embodiment, the scanning engine 2 acquires four barcode images within one lighting time of the light supplement lamps (6, 7). In other embodiments, the scan engine 2 may capture two frames, three frames, or other barcode images in more than two frames during a single light emission time.
As shown in fig. 9 to 12, a system 200 for controlling light supplement lamps (6, 7, 10) of a scanning device 100 according to a second embodiment of the present invention and the scanning device 100 are different from the first embodiment in that: the front end of the housing 1 has two light compensating windows 12 respectively located at the left and right sides of the scanning window 11, the number of the light compensating lamps (6, 7, 10) is 6, the light compensating window 12 including a first light compensating lamp 6 located at the left side and a second light compensating lamp 7 located at the right side are provided with the light compensating window 12, and four third light compensating lamps 10 respectively located at the four corners of the front panel 4 and surround the lens 9, the wave band or color of the illumination light emitted by the third light compensating lamps 10 is different from the wave band or color of the illumination light emitted by the first light compensating lamp 6 and the second light compensating lamp 7, preferably the third light compensating lamp 10 emits white light, the first light compensating lamp 6 emits monochromatic red light, the second light compensating lamp 7 emits monochromatic green light, two light compensating units 201 controlling the first light compensating lamp 6 and the second light compensating lamp 7 are integrated with the main control unit 203, and the three light compensating units 201 controlling the four light compensating units 10 are integrated on the front panel 4. In this embodiment, the space on the front end surface of the housing 1 is fully utilized to set the light compensating window 12, so as to set more light compensating lamps (6, 7, 10), which solves the problem that more light compensating lamps (6, 7, 10) cannot be set in the scanning window 11, and the light compensating lamps (6, 7) set in the light compensating window 12 cannot be collected by the scanning engine 2 due to the fact that the scanning window 12 directly reflects illumination light to the lens 9, so that adverse effects on scanning are generated.
The light emitting times of the first light supplementing lamp 6, the second light supplementing lamp 7 and the third light supplementing lamp 10 are staggered, specifically: the first light supplementing lamp 6 emits light first, the second light supplementing lamp 7 just starts to emit light when the first light supplementing lamp 6 stops emitting light, the third light supplementing lamp 10 just starts to emit light when the second light supplementing lamp 7 stops emitting light, and the above light emitting mode can be periodically performed until the code scanning is successful.
Fig. 14 is a flowchart of a light-compensating lamp control method corresponding to the light-compensating lamp control system described above. As shown in fig. 14, the light supplement lamp method may include the steps of:
801. and controlling the first light supplementing lamp to emit light.
802. And adjusting the exposure time of the scanning engine to be smaller than the light emitting time of the first light supplementing lamp.
803. And collecting at least one frame of image in the light emitting time of the first light supplementing lamp.
804. Decoding the image acquired by the scan engine.
805. And judging whether the decoding is successful or not. If yes, go to step 806, if no, go to step 807.
806. And (5) stopping light filling and ending the scanning.
807. And controlling the first light supplementing lamp to stop lighting and controlling the second light supplementing lamp to light.
808. And adjusting the exposure time of the scanning engine to be smaller than the light emitting time of the second light supplementing lamp.
809. And collecting at least one frame of image in the light emitting time of the second light supplementing lamp.
810. Decoding the image acquired by the scan engine.
811. And judging whether the decoding is successful or not. If yes, go to step 812, if no, go to step 813.
812. And (5) stopping light filling and ending the scanning.
813. And controlling the second light supplementing lamp to stop lighting and returning to the step 801.
The light supplementing lamp control system and method of the scanning device have the following beneficial effects:
1. at least two light supplementing lamps (6, 7) are controlled to alternately emit light through the light supplementing control unit 201, a plurality of illumination angles are provided for illuminating the bar code B to be read, when reflected light generated by one light supplementing lamp affects the reading of the bar code B, the influence of the reflected light is reduced through the illumination of the light supplementing lamp at other positions, and the reading success rate of the bar code B is improved.
2. The light supplementing lamps (6, 7) emit light gradually in the light emitting time, the scanning engine 2 can collect multi-frame images in the single light emitting time of the light supplementing lamps (6, 7), so that the scanning engine 2 can collect multi-frame images with different brightness in the light emitting time of the light supplementing lamps (6, 7), and the scanning device 100 can successfully decode when the brightness of the surface of the bar code image is proper, and the decoding success rate is improved.
3. The colors of the illumination lights emitted by the first light supplementing lamp 6 and the second light supplementing lamp 7 are different, and as the absorption rate and the reflectivity of the illumination lights with different colors are different, the illumination lights with different colors are adopted by the first light supplementing lamp 6 and the second light supplementing lamp 7, so that the contrast of the bar code B can be improved by the illumination lights with one color, the contrast of the background where the bar code B is positioned can be reduced, the scanning device 100 can identify the bar codes on the surfaces of different materials, and the scanning device is suitable for more scanning scenes.
Claims (10)
1. A scanning device, comprising:
the system comprises a scanning engine used for acquiring images and a light supplementing lamp arranged on the scanning engine for illuminating when the images are acquired;
the main control unit is electrically connected with the scanning engine, and is used for controlling the brightness of the light supplementing lamp to emit light in a gradual change mode, and controlling the exposure time of the scanning engine to be matched with the light emitting time of the light supplementing lamp, so that the scanning engine can collect multi-frame images in the light emitting time of the light supplementing lamp; the main control unit is used for analyzing and decoding the image acquired by the scanning engine.
2. The scanning device of claim 1, wherein: the light source comprises a shell, wherein a scanning window and a light supplementing window are adjacently arranged on the front end face of the shell, the scanning engine is contained in the shell and exposed out of the scanning window, the light supplementing lamp is arranged on the scanning engine, the other light supplementing lamp is arranged on the light supplementing window, and the light supplementing lamp arranged on the light supplementing window and the light supplementing lamp arranged on the scanning engine are used for lighting when the scanning engine collects images.
3. A scanning device as claimed in claim 2, characterized in that: the front end face of the shell is provided with two light supplementing windows, each light supplementing window is internally provided with one light supplementing lamp, and the brightness of the light supplementing lamp on the scanning engine and the brightness of the two light supplementing lamps in the two light supplementing windows are gradually changed to emit light.
4. The scanning device of claim 1, wherein: the light supplementing lamp is a first light supplementing lamp and further comprises a second light supplementing lamp, the brightness of the second light supplementing lamp is gradually changed to emit light, the second light supplementing lamp and the light emitting time of the first light supplementing lamp are staggered, and the first light supplementing lamp and the second light supplementing lamp are used for illuminating when the scanning engine collects images.
5. A scanning device as claimed in any one of claims 2 to 4, wherein: the wave bands or colors of the illumination lights emitted by the light supplementing lamps are different.
6. The scanning device of claim 1, wherein: the light supplementing control unit is used for controlling the light supplementing lamp to emit light; an exposure control unit for controlling the exposure time of the scanning engine; the main control unit is respectively and electrically connected with the scanning engine, the light supplementing control unit and the exposure control unit and is used for controlling the brightness of the light supplementing lamp to emit light in a periodical gradual change mode through the light supplementing control unit.
7. The light supplementing lamp control method of the scanning device is characterized by comprising the following steps of:
A. controlling the brightness of the light supplementing lamp of the scanning device to emit light in a gradual change mode;
B. controlling the exposure time of the scanning engine to be less than the light emitting time of the light supplementing lamp;
C. collecting at least one frame of image in the light emitting time of the light supplementing lamp;
D. decoding an image acquired by the scan engine;
E. judging whether decoding is successful: and if the decoding is successful, the light supplementing is terminated.
8. The method for controlling a light filling lamp of a scanning apparatus according to claim 7, wherein: in step E, when decoding is unsuccessful, step F: controlling the light supplementing lamp to stop lighting and controlling the brightness of the other light supplementing lamp to gradually-changed lighting; step G: controlling the exposure time of the scanning engine to be smaller than the light emitting time of the other light supplementing lamp; step H: at least one frame of image is acquired in the light emitting time of the other light supplementing lamp; step I: decoding an image acquired by the scan engine; step J: judging whether decoding is successful: and if the decoding is successful, the light supplementing is terminated.
9. The method for controlling a light filling lamp of a scanning apparatus according to claim 7, wherein: the scanning device comprises a shell, a scanning window and a light supplementing window are adjacently arranged on the front end face of the shell, the scanning engine is contained in the shell and exposed out of the scanning window, the light supplementing lamp comprises a first light supplementing lamp arranged on the scanning engine and a second light supplementing lamp arranged on the light supplementing window, and the first light supplementing lamp and the second light supplementing lamp are both used for lighting when the scanning engine collects images.
10. The light-filling lamp control method of a scanner device according to claim 8 or 9, characterized in that: the wave bands or colors of the illumination lights emitted by the light supplementing lamps are different.
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| CN202310456243.5A CN116415608A (en) | 2018-11-15 | 2018-11-15 | Scanning device and light supplementing lamp control method thereof |
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| CN202310456243.5A CN116415608A (en) | 2018-11-15 | 2018-11-15 | Scanning device and light supplementing lamp control method thereof |
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| CN202310456243.5A Pending CN116415608A (en) | 2018-11-15 | 2018-11-15 | Scanning device and light supplementing lamp control method thereof |
| CN202310368043.4A Pending CN116739009A (en) | 2018-11-15 | 2018-11-15 | Scanning device, light supplementing lamp control system and control method thereof |
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| CN109684887B (en) * | 2018-11-15 | 2020-09-11 | 无锡盈达聚力科技有限公司 | Scanning device, and light supplement lamp control system and control method thereof |
| CN111343333B (en) * | 2020-02-04 | 2021-05-04 | Oppo广东移动通信有限公司 | Proximity detection control method and related device |
| CN111460848B (en) * | 2020-04-01 | 2023-05-02 | 福州符号信息科技有限公司 | Reading equipment and method capable of identifying bar codes of various materials and color bar codes |
| CN113691776B (en) * | 2021-08-18 | 2024-02-09 | 南京领行科技股份有限公司 | In-vehicle camera system and light supplementing method |
| CN114239622B (en) * | 2021-12-16 | 2023-07-04 | 福建新大陆自动识别技术有限公司 | Desktop bar code reading equipment for mobile payment |
| CN114827403B (en) * | 2022-04-07 | 2024-03-05 | 安徽蔚来智驾科技有限公司 | Vehicle-mounted image acquisition system, control method, vehicle and storage medium |
| CN115220286B (en) * | 2022-07-18 | 2024-02-27 | 上海商米科技集团股份有限公司 | Code scanning engine scanning method and system, code scanning equipment and storage medium |
| CN115146664B (en) * | 2022-09-06 | 2022-12-23 | 无锡盈达聚力科技有限公司 | Image acquisition method and device |
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| US6254003B1 (en) * | 1995-12-18 | 2001-07-03 | Welch Allyn Data Collection, Inc. | Optical reader exposure control apparatus comprising illumination level detection circuitry |
| CN102932603A (en) * | 2012-08-16 | 2013-02-13 | 浙江宇视科技有限公司 | Light supplementation control method and camera |
| CN102830573B (en) * | 2012-09-10 | 2015-08-19 | 华为终端有限公司 | A kind of flash control method and device |
| CN103218596B (en) * | 2013-04-17 | 2016-09-07 | 苏州斯普锐智能系统有限公司 | There is barcode scanner and the bar code scanning method thereof of dynamic multi-angle illuminator |
| CN105138940A (en) * | 2015-08-14 | 2015-12-09 | 福建联迪商用设备有限公司 | Light supplementing method in two-dimensional code scanning and system thereof |
| CN105574457A (en) * | 2015-12-15 | 2016-05-11 | 东软集团股份有限公司 | Light supplementing method and device for scanning terminal |
| CN205507816U (en) * | 2016-03-17 | 2016-08-24 | 上海益码物联网有限公司 | Bar code terminal of decoding |
| CN108171095A (en) * | 2016-12-07 | 2018-06-15 | 中兴通讯股份有限公司 | A kind of scan method, device and terminal |
| CN106611146A (en) * | 2016-12-26 | 2017-05-03 | 苏州斯普锐智能系统有限公司 | Barcode scanning equipment based on full-waveband spectrum |
| CN108416239B (en) * | 2018-01-31 | 2019-10-11 | 深圳盈达信息科技有限公司 | A kind of bar code identifies the control method of engine and its reduction power consumption |
| CN109684887B (en) * | 2018-11-15 | 2020-09-11 | 无锡盈达聚力科技有限公司 | Scanning device, and light supplement lamp control system and control method thereof |
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| CN109684887A (en) | 2019-04-26 |
| CN116739009A (en) | 2023-09-12 |
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| CN109684887B (en) | 2020-09-11 |
| CN112115728A (en) | 2020-12-22 |
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