WO2017049709A1

WO2017049709A1 - Bar code reading apparatus using two markers to locate bar code to be read

Info

Publication number: WO2017049709A1
Application number: PCT/CN2015/093131
Authority: WO
Inventors: 白楠; 许文焕; 易仰卿; 李瑞兵
Original assignee: 深圳市民德电子科技股份有限公司
Priority date: 2015-09-23
Filing date: 2015-10-28
Publication date: 2017-03-30
Also published as: CN105224902A; CN105224902B

Abstract

The present invention relates to a bar code reading apparatus using two markers to locate a bar code to be read, comprising: an imaging system for acquiring an image of a bar code to be read; and at least two optical indication modules for respectively forming indication markers at the bar code to be read, the at least two optical indication modules comprising a first optical indication module and a second optical indication module. The optical axes of the first optical indication module and the second optical indication module form an included angle. A first indication marker formed by the first optical indication module and a second indication marker formed by the second optical indication module intersect between a near plane and a far plane of the imaging system. The at least two optical indication modules having optical axes arranged to form an included angle cause the first indication marker and second indication marker to intersect between the near plane and the far plane of the imaging system, facilitating adjustment of the position of the bar code to be read. Disposing the intersection point on the bar code to be read precisely positions the bar code to be read, enabling the imaging system to acquire a clear image.

Description

Bar code reading device for positioning bar code to be read by two sets of cursors

[0001] The present invention relates to the field of optoelectronics, and more particularly to a bar code reading device that positions a bar code to be read with two sets of cursors.

[0002]

Background technique

[0003] A bar code reading device in the related art generally has only one or two sets of optical cueing components arranged in parallel. When such a barcode reading device reads the barcode, the operator can visually determine the relative position between the barcode to be read and the reading device according to the prompting cursor on the barcode to be read by the barcode reading device. To achieve reading.

[0004] The prompt cursor of the bar code reading device can only assist the operator in making a rough judgment on the position of the bar code to be read, and cannot accurately determine whether the relative position of the bar code to be read and the imaging system is optimal. In particular, for a fine-to-read barcode, because of its small size and high resolution, in order to obtain a larger image on the photosensitive chip of the imaging system, it is not necessary to select an imaging system with a large magnification. The field of view of the imaging system is small, so the prompt cursor is required to accurately locate the position of the bar code to be read. A bar code reading device using the existing cueing cursor technology cannot achieve the purpose of accurately locating the bar code to be read.

technical problem

The technical problem to be solved by the present invention is to provide a barcode reading device for positioning a barcode to be read by two sets of cursors.

Problem solution

Technical solution

The technical solution adopted by the present invention to solve the technical problem thereof is: constructing a barcode reading device for positioning a barcode to be read by two sets of cursors, comprising an imaging system for acquiring a barcode image to be read and for At least two groups of light prompting components respectively forming a prompting cursor on the barcode to be read, the at least two groups of light prompting components comprising a first light prompting component and a second light prompting component; [0007] The optical axes of the first light-prompting component and the second light-prompting component are disposed at an angle, and the first prompt cursor formed by the first light-prompting component and the second prompt formed by the second light-prompting component The cursor intersects between the distant view plane and the near view plane of the imaging system.

[0008] Preferably, the first prompt cursor and the second prompt cursor intersect on an alignment plane of the imaging system

[0009] Preferably, an optical axis of the first light prompting component and the second light prompting component are respectively at an angle with an optical axis of the imaging system, and the first prompting cursor and the second prompting cursor intersecting each other On the alignment plane of the imaging system, the intersection is located on the optical axis of the imaging system.

[0010] Preferably, the first light prompting component and the second light prompting component are arbitrably disposed relative to the imaging system to adjust an intersection position of the first prompt cursor and the second prompt cursor.

[0011] Preferably, the first light-prompting component includes a first prompt light source and a first light-collecting unit, and the light signal of the first prompt light source forms the first a prompt cursor;

[0012] The second light prompting component includes a second prompting light source and a second light collecting unit disposed at intervals, and the light signal of the second prompting light source forms the second prompting cursor after passing through the second light collecting unit .

[0013] Preferably, the first prompt light source and/or the first light collecting unit are deflectably disposed relative to the imaging system to adjust a position of the first prompt cursor; and/or, the Adjusting a relative position of the first light collecting unit and the first light collecting unit to adjust a position of the first prompting cursor; and/or, a positioning angle of the first prompt light source or the first light collecting unit is adjustable, To adjust the position of the first prompt cursor

[0014] the second prompting light source and/or the second light collecting unit are deflectably disposed relative to the imaging system to adjust a position of the second prompting cursor; and/or the second prompting light source The relative position of the second concentrating unit is adjustable to adjust the position of the second prompting cursor; and/or the placement angle of the second prompting light source or the second concentrating unit is adjustable to adjust the position The position of the second prompt cursor.

[0015] Preferably, the first prompt light source and the second prompt light source respectively comprise an illuminant, and the shape of the first prompt cursor and the second prompt cursor presented by the illuminant is similar or identical to the shape of the illuminant ;

[0016] The first prompt light source and the second prompt light source respectively comprise an LED lamp with the illuminant.

[0017] Preferably, the first light prompting component includes a plurality of first light collecting units of different focal lengths that are replaceable; or, the first light prompting component includes a first light collecting unit with an adjustable focus position; [0018] the second light prompting component includes a plurality of second light collecting units of different focal lengths that are replaceable; or

[0019] The second light prompting component includes a second light collecting unit with an adjustable focus position.

[0020] Preferably, the first concentrating unit comprises a combination of one or more of a convex lens, a spherical mirror and an aspheric mirror; the second concentrating unit comprises a convex lens, a spherical mirror, an aspheric surface A combination of one or more of the mirrors.

[0021] Preferably, the bar code reading device further comprises at least one fill light source for illuminating the image capturing area of the imaging system, and the brightness of the fill light source is adjustable.

[0022] Preferably, the imaging system includes an imaging system with an adjustable imaging focal length; or

[0023] The imaging system includes at least two imaging systems that differ in imaging focal length.

Advantageous effects of the invention

Beneficial effect

[0024] The barcode reading device for positioning a barcode to be read by using two sets of cursors of the present invention has the following beneficial effects: setting the light prompt component by an angle of at least two sets of optical axes, and letting the first prompt cursor and the second prompt The cursor intersects between the distant view plane and the near view plane of the imaging system and is located at the center of the view of the imaging system. It is convenient to adjust the position of the barcode to be read, so that the barcode to be read is located at the intersection point, and the accurate positioning of the barcode is read to enable imaging. The system can get clear images.

[0025] In particular, when reading a fine barcode, an imaging system with a high magnification and a small field of view is required, and the depth of field of the image system for the fine barcode is relatively short, and the barcode reading device provided by the present invention is provided. The position of the fine bar code can be precisely positioned, so that the fine bar code is located within the field of view of the imaging system and within the depth of field of the imaging system, meeting the positioning requirements of the fine bar code.

Brief description of the drawing

DRAWINGS

The present invention will be further described with reference to the accompanying drawings and embodiments in which:

1 is a schematic diagram of a barcode reading device for reading a barcode to be read by two sets of cursors in the embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

BEST MODE FOR CARRYING OUT THE INVENTION DETAILED DESCRIPTION OF THE INVENTION [0028] In order to more clearly understand the technical features, objects and effects of the present invention, the embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0029] As shown in FIG. 1, a bar code reading device for positioning a bar code to be read by using two sets of cursors in a preferred embodiment of the present invention includes a housing 1, an imaging system 3 for acquiring an image of the barcode 2 to be read, and Two sets of light prompting components for respectively forming a prompt cursor on the barcode 2 to be read, and the imaging system 3 and the light prompting component are all disposed on the casing 1. The two sets of light suggesting components include a first light prompting component 4 and a second light prompting component 5. In other embodiments, the bar code reading device may also include more than two light cue components to form a cue cursor, respectively.

[0030] Preferably, the imaging system 3 includes an imaging system with an adjustable imaging focal length, which can be used to clearly image the barcodes 2 to be read at different distances by adjusting the focal length. In other embodiments, the imaging system 3 may also include at least two imaging systems having different imaging focal lengths. After capturing the barcode 2 to be read corresponding to the corresponding distance, the imaging system 3 corresponding to the focal length is used for image capturing. Of course, the imaging system 3 can also be an imaging system with a fixed focal length.

[0031] Preferably, the bar code reading device to be read further comprises at least one fill light source 6 for illuminating the image capturing area of the imaging system 3 for facilitating illumination of the bar code 2 to be read, for clear imaging. Further, the brightness of the fill light source 6 is adjustable.

[0032] The optical axes of the first light prompting component 4 and the second light prompting component 5 are disposed at an angle, and the first prompting cursor 41 formed by the first light prompting component 4 and the second prompting cursor formed by the second light prompting component 5 are formed. 51 intersects between the distant view plane A of the imaging system 3 and the near view plane B, so that the position where the first prompt cursor 41 and the second prompt cursor 51 intersect is located in the interval in which the imaging system 3 has a good imaging effect. When the bar code 2 to be read moves between the distant view plane A and the near view plane B, a clear image can be obtained, and the bar code 2 to be read can be conveniently moved to the intersection of the first prompt cursor 41 and the second prompt cursor 51. Position, the barcode 2 is accurately positioned for the imaging system 3 to obtain a clear barcode image.

[0033] Preferably, the first prompting cursor 41 and the second prompting cursor 51 intersect on the alignment plane C of the imaging system 3.

Aligning the plane C, that is, the optimal image surface of the imaging system 3, after acquiring the image information of the barcode 2 to be read, by adjusting the position of the barcode 2 to be read, the first display on the barcode 2 to be read The prompt cursor 4 1 and the second prompt cursor 51 are coincident, that is, the barcode 2 to be read is placed on the alignment plane C, so that high-definition image information can be obtained. The near view plane B is located between the alignment plane C and the imaging system 3, and the perspective plane A is located Aligning the side of plane C opposite imaging system 3.

[0034] Further, the optical axes of the first light prompting component 4 and the second light prompting component 5 are respectively at an angle with the optical axis of the imaging system 3, and the first prompting cursor 41 and the second prompting cursor 51 intersect with the imaging. The alignment of system 3 is on plane C and on the optical axis of imaging system 3. Therefore, after moving the barcode to be read 2, it is easier to find the center position of the view of the imaging system 3, so that the intersection of the first prompt cursor 41 and the second prompt cursor 51 just hits the center position of the barcode 2 to be read, so that The placement position of the barcode 2 to be read is more accurately positioned at the center of the view of the imaging system 3, so that the imaging system 3 can acquire the high-definition image of the barcode 2 to be read.

[0035] In some embodiments, the first light prompting component 4 and the second light prompting component 5 are deflectably disposed relative to the imaging system 3 to adjust the intersection of the first prompting cursor 41 and the second prompting cursor 51. The intersection of the first prompt cursor 41 and the second prompt cursor 51 can be adjusted according to different usage requirements.

[0036] Preferably, in some embodiments, the first light prompting component 4 includes a first prompt light source 42 and a first light collecting unit 43 disposed at intervals, and the light signal of the first prompt light source 42 passes through the first light collecting unit 43. The first prompt cursor 41 is formed. The second light prompting component 5 includes a second prompting light source 52 and a second light collecting unit 53 which are disposed at intervals. The light signal of the second prompting light source 52 passes through the second light collecting unit 53 to form a second prompting cursor 51. In other embodiments, the first light prompting component 4 and the second light prompting component 5 may also include other independent light sources that can emit a cue light signal in a straight line.

[0037] In order to adjust the position of the first prompting cursor 41, one or both of the first prompting light source 42 and the first concentrating unit 43 may be deflectably disposed relative to the imaging system 3 to adjust the first prompting cursor 41. s position. Of course, in other embodiments, the relative positions of the first prompting light source 42 and the first concentrating unit 43 are adjustable, and can also be used to adjust the position of the first prompting cursor 41. Alternatively, the first prompt light source 42 and the first light collecting unit 43 are adjustable in relative position, and the first prompt light source 42 and the first light collecting unit 43 are disposed in a deflectable manner to make the position of the first prompting cursor 41 more Convenient adjustment. The above adjustment mode can also be used in combination to adjust the position of the first prompt cursor 41.

[0038] In order to adjust the position of the second prompting cursor 51, one or both of the second prompting light source 52 and the second light collecting unit 53 may be deflectably disposed relative to the imaging system 3 to adjust the second prompting cursor 51. s position. Of course, in other embodiments, the relative positions of the second prompting light source 52 and the second concentrating unit 53 are adjustable, and can also be used to adjust the position of the second prompting cursor 51. Alternatively, the second prompt light source 52 and the second light collecting unit 53 can be deflected in combination with the second prompt light source 52 and the second light collecting unit 53 The setting makes the position of the second prompt cursor 51 more convenient to adjust. The above adjustment mode can also be used in combination to adjust the position of the second prompt cursor 51.

[0039] Further, the first prompt light source 42 and the second prompt light source 52 respectively comprise an illuminant, and the first prompt light source 42 and the second prompt light source 52 respectively comprise LED lights with illuminants. The shape of the first prompt cursor 41 and the second prompt cursor 51 of the illuminant are similar to or the same as the shape of the illuminator, so that the first prompt cursor 41 and the second prompt cursor 51 are aligned and coincide. The shape of the light body generated by the illuminant illumination may be a specific shape, and the shape of the first prompt cursor 41, the second prompt cursor 51, and the shape of the illuminant formed by the first concentrating unit 43 and the second concentrating unit 53 respectively Proportional magnification, presented on the barcode 2 to be read. In other embodiments, the shapes of the first prompt cursor 41 and the second prompt cursor 51 may also be the same or scaled as the shape of the illuminant.

[0040] In some embodiments, the first concentrating unit 43 includes one of a convex lens, a spherical mirror, and an aspherical mirror, and may also be a combination of plural kinds. The second light collecting unit 53 includes one of a convex lens, a spherical mirror, and an aspherical mirror, and may be a combination of plural kinds. The first illuminating unit 43 and the second concentrating unit 53 respectively reflect and refract the shape of the light body of the first illuminating unit 42 and the second illuminating unit 52 to form a first prompt cursor 41 and a second prompt cursor. 51. It is to be understood that the above technical features may be used in any combination without limitation.

The above description is only the embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformation of the present invention and the contents of the drawings may be used directly or indirectly. The related technical fields are all included in the scope of patent protection of the present invention.

Claims

Claim

[Claim 1] A bar code reading device for positioning a bar code to be read by two sets of cursors, comprising: an imaging system (3) for acquiring an image of a bar code (2) to be read and for At least two groups of light prompting components respectively forming a prompting cursor are formed on the bar code (2), wherein the at least two sets of light prompting components comprise a first light prompting component (4) and a second light prompting component (5);

The optical axes of the first light prompting component (4) and the second light prompting component (5) are disposed at an angle, and the first prompting cursor (41) formed by the first light prompting component (4) and the first The second prompt cursor (51) formed by the two-light prompting component (5) intersects between the distant view plane (A) and the near view plane (B) of the imaging system (3).

[Claim 2] The barcode reading device for positioning a barcode to be read by using two sets of cursors according to claim 1, wherein the first prompt cursor (41) and the second prompt cursor (51) can intersect On the alignment plane (C) of the imaging system (3).

[Claim 3] The barcode reading device for positioning a barcode to be read by using two sets of cursors according to claim 1, wherein the first light prompting component (4) and the second light prompting component (5) The optical axes are respectively at an angle to the optical axis of the imaging system (3), and the first prompt cursor (41) and the second prompt cursor (51) intersect at an alignment plane of the imaging system (3) (C), the intersection is located on the optical axis of the imaging system (3).

[Claim 4] The barcode reading device for positioning a barcode to be read by using two sets of cursors according to any one of claims 1 to 3, wherein the first light prompting component (4) and the second light The prompting component (5) is pivotably arranged relative to the imaging system (3) to adjust the intersection of the first prompting cursor (41) and the second prompting cursor (51).

[Claim 5] The barcode reading device for positioning a barcode to be read by using two sets of cursors according to any one of claims 1 to 3, wherein the first light prompting component (4) comprises an interval setting a first prompting light source (42) and a first concentrating unit (43), wherein the light signal of the first prompting light source (42) forms the first prompting cursor after passing through the first concentrating unit (43) The second light prompting component (5) includes a second prompt light source (52) and a first interval The second concentrating unit (53), the light signal of the second prompting light source (52) passes through the second concentrating unit (53) to form the second prompting cursor (51).

[Claim 6] The barcode reading device for positioning a barcode to be read by using two sets of cursors according to claim 5, wherein the first prompt light source (42) and/or the first light collecting unit (43) being deflectably disposed relative to the imaging system (3) to adjust a position of the first cue cursor (41); and/or, the first cue light source (42) and the first concentrating light The relative position of the unit (43) is adjustable to adjust the position of the first prompting cursor (41); and/or the placement angle of the first prompting light source (42) or the first light collecting unit (43) is Adjusting to adjust the position of the first prompt cursor (41);

The second cueing light source (52) and/or the second concentrating unit (53) are deflectably disposed relative to the imaging system (3) to adjust a position of the second cue cursor (51); Or, the relative positions of the second prompting light source (52) and the second concentrating unit (53) are adjustable to adjust the position of the second prompting cursor (51); and/or, the The placement angle of the second prompt light source (52) or the second light collecting unit (53) is adjustable to adjust the position of the second prompt cursor (51).

[Claim 7] The barcode reading device for positioning a barcode to be read by using two sets of cursors according to claim 5, wherein the first prompt light source (42) and the second prompt light source (52) respectively comprise The shape of the first prompt cursor (41) and the second prompt cursor (51) presented by the illuminant is similar to or the same as the shape of the illuminant;

The first prompting light source (42) and the second prompting light source (52) respectively comprise an LED lamp with the light emitting body.

[Claim 8] The barcode reading device for positioning a barcode to be read by using two sets of cursors according to claim 5, wherein the first light prompting component (4) comprises a plurality of different focal lengths that are replaceable a first light collecting unit (43); or, the first light prompting component (4) includes a first light collecting unit (43) with an adjustable focus position;

The second light prompting component (5) includes a plurality of second light collecting units (53) of different focal lengths replaceable; or the second light prompting component (5) includes a second light collecting position with adjustable focus position Unit (53).

[Claim 9] The barcode reading apparatus for positioning a barcode to be read by using two sets of cursors according to claim 8, wherein the first concentrating unit (43) comprises a convex lens, a spherical mirror, and an aspheric surface a combination of one or more of the mirrors; the second concentrating unit (53) comprising a combination of one or more of a convex lens, a spherical mirror, and an aspheric mirror.

[Claim 10] The barcode reading apparatus for positioning a barcode to be read by using two sets of cursors according to any one of claims 1 to 3, wherein the barcode reading apparatus further comprises at least one for illuminating The fill light source (6) of the image capturing section of the imaging system (3), the brightness of the fill light source (6) is adjustable.