WO2015120615A1

WO2015120615A1 - All-directional high-speed laser bar code scanning apparatus

Info

Publication number: WO2015120615A1
Application number: PCT/CN2014/072097
Authority: WO
Inventors: 徐朝荣
Original assignee: 广东旭龙物联科技股份有限公司
Priority date: 2014-02-13
Filing date: 2014-02-14
Publication date: 2015-08-20
Also published as: CN103745189A; CN103745189B

Abstract

An all-directional high-speed laser bar code scanning apparatus comprises a base housing (100). A groove (101) is formed in the middle of the base housing. Three light source open grooves (102-1, 102-2, 102-3) are formed in the periphery of the base housing, and the included angle between every two adjacent light source open grooves is 120 degrees. Three laser diodes (201-1, 201-2, 201-3) are correspondingly fixed in the light source open grooves. Three reflecting mirror brackets (301-1、301-2、301-3) are in one-to-one correspondence to the light source open grooves, each of the reflecting mirror brackets is provided with an emitted light reflecting mirror (302-1, 302-2, 302-3) and a received light reflecting mirror (303-1, 303-2, 303-3), and an opening is formed in the middle of the received light reflecting mirror. A rotary reflecting mirror group (400) is disposed at the central position of the groove. The rotary reflecting mirror group comprises a rotary motor (401) and multiple reflecting mirrors (402) disposed on the side surfaces of the rotary motor. An annular column reflecting mirror group (500) is disposed on the side surface of the boundary of the groove. Three light receiving open grooves (601-1, 601-2, 601-3) are formed below the rotary reflecting mirror group, and the included angle between every two adjacent light receiving open grooves is 120 degrees; a photosensitive receiving tube is disposed on each of the light receiving open grooves. The all-directional high-speed laser bar code scanning apparatus has the advantages of a wide scanning range, a high scanning speed, a large quantity of lines, a good bar code identification effect and the like.

Description

Technical field

The present invention relates to the field of bar code scanning technology, and in particular, to an omnidirectional high speed laser bar code scanning device. Background technique

Bar code scanning device, also known as bar code reader, bar code scanner, bar code scanner, bar code scanner, etc., is an optical principle that decodes the information contained in the bar code and transmits it to the computer through a data line or wirelessly. Equipment such as devices. The bar code scanning device has accurate identification, fast data input speed, and low equipment cost and low cost. It is widely used in commercial POS (Point Of Sale), cash register system, supermarket, express delivery, warehousing, logistics, books, medicine, etc. field.

Depending on the light source, the bar code scanning device can be divided into a rainbow bar code scanner and a laser (laser) laser bar code scanner. The Rainbow Light Barcode Scanner, also known as a CCD (Charge-coupled Device) image sensor, uses the principle of photoelectric coupling to image a bar code printed pattern and then decode it. The advantage is that there is no shaft, long life and The cost is low; and the laser bar code scanner is a single-line scanner that uses a laser diode as a light source, which is superior to the rainbow bar code scanner in scanning speed, scanning distance, scanning sensitivity, etc., thus obtaining a wider application, currently The mainstream scanner on the market is a laser barcode scanner.

The conventional laser barcode scanner is provided with a single laser light source, and a plurality of reflective lenses are arranged at different inclination angles around the laser light source according to actual needs, and a polygon mirror is disposed at a central position of the plurality of reflective lenses. The multi-faceted mirror is rotated by a motor or a motor to realize a multi-directional scanning line optical network formed by a single light source. As shown in FIG. 1, the multi-directional scanning line optical network can be used to test the barcode. Information is read. The conventional laser scanning device can only form a scanning line optical network within a limited angle, and the number of scanning lines is small, and there are a plurality of single scanning lines 10 at each preset angle, and the barcode to be tested must be placed at an appropriate angle. In the scanning line optical network, it can be correctly recognized. Affects the effect of bar code reading.

Since the laser scanning device is a single-line scanner, one of the important factors affecting the bar code reading effect is the number of laser scanning lines, that is, when the laser scanning device projects the scanning line optical network to the bar code to be tested, the scanning line optical network is The number of laser scan lines projected at each moment largely determines the recognition effect of the barcode. Generally speaking, the more the number of scan lines, the better the scanning effect of the device.

In order to improve the scanning effect of the laser bar code scanning device, the Chinese patent (application number:

200310101759.0) A variable scanning device and method for a laser bar code reading device is proposed, which mainly comprises a variable driving device, so that a polygon mirror at a central position of the scanning device performs a predetermined variable angle and a predetermined swing frequency with a swing center. Swinging, so that each laser scanning line derives a plurality of scanning lines parallel to each other. As shown in FIG. 2, if the original scanning line 10 is used as the reference line 10, after the improvement of the scheme, each piece The reference line 10 will each derive a plurality of scan lines 11 parallel thereto. Therefore, the technical means adopted by the technical solution is to increase the number of scanning lines of the laser scanning device by multiplying each scanning line in the original scanning line optical network.

Although the above technical solution increases the number of laser scanning lines and improves the bar code recognition effect, since it only repeatedly increases the number of existing scanning lines in the original scanning line optical network, the scanning line light can only be formed within a limited angle. The scanning angle covered by the scanning line optical network still fails to reach 360-degree coverage, and the scanning range is small. The scanning blind area is below the scanning line optical network as shown in FIG. 2, and the barcode to be tested still needs to be A certain angle and the correct position are placed in the scanning line optical network to be aligned correctly to identify the scanning line, which affects the bar code recognition effect and ease of use, and the defect of the slow scanning speed of a single laser light source remains unresolved. . Summary of the invention

The technical problem to be solved by the present invention is to provide an omnidirectional high-speed laser bar code scanning device, how to improve the structure of the conventional laser bar code scanning device, increase the number of scanning lines, and form an omnidirectional scanning line optical network. , improve the recognition accuracy of the bar code to be tested, and expand the effective recognition area.

To solve the above technical problem, the present invention provides an omnidirectional high-speed laser barcode scanning device, including: a base housing; a recess is disposed in the middle of the base housing, and three light source slots surrounding the recess are provided around the base housing, and adjacent light source slots are mutually clamped The angle is 120 degrees;

Three laser diodes are respectively fixed through a mounting component, correspondingly fixed in the light source slot, respectively for generating a light beam and projecting out through a predetermined beam projection path;

Three mirror brackets are respectively slotted with the light source - correspondingly mounted on the corresponding light source slots; each of the mirror brackets is respectively provided with a light projecting mirror and a light collecting mirror; The light-receiving mirror is disposed in front of the light-emitting mirror, and an opening is disposed in a middle portion of the light-receiving mirror;

a rotating mirror group disposed at a central position of the groove, the rotating mirror group including a rotating electrical machine and a polygon mirror disposed on a side of the rotating electrical machine, the polygon mirror being in the rotating electrical machine Rotating at a preset speed under the control;

a ring-column mirror group consisting of a plurality of reflecting lenses of different angles, respectively arranged on the boundary side of the groove;

And three light-receiving slots are respectively disposed under the rotating mirror group, and the adjacent light-receiving slots are at an angle of 120 degrees with each other, and corresponding to the position of the light source slotting; Each of the light receiving slots is mounted with a photosensitive receiving tube;

The light projecting mirror is disposed in a forward direction of the beam projecting path, and after the light beam generated by each of the laser diodes is projected to a corresponding light projecting mirror, passes through an opening in the light collecting mirror Projecting on a mirror in the rotating mirror group, and forming a 360-degree full-coverage grid optical network through the secondary reflection of the loop mirror group to realize omnidirectional scanning of the barcode;

The light-receiving mirror reflects the returned light beam after the barcode scanning onto a mirror of the loop mirror group, and is collected on the photosensitive receiving tube after being reflected by the loop mirror group.

Preferably, each of the laser diodes emits a beam having a wavelength of 650 nanometers.

Further, the polygon mirror disposed on the side of the rotating electrical machine is composed of a hexahedral mirror, and the adjacent mirrors are at an angle of 120 degrees with each other.

In an implementation manner, the ring array mirror group includes three sets of trapezoidal mirror groups arranged on a boundary side of the groove, and the position of each set of trapezoidal mirror groups is slotted with the light source— -correspond, And each set of trapezoidal mirror sets includes three trapezoidal lenses having a predetermined tilt angle.

Further, the scanning speed of the bar code scanning device is 4860 lines/second.

In particular, the barcode scanning device is configured to scan and identify a one-dimensional barcode and/or a two-dimensional barcode. Further, the barcode scanning device further includes a barcode data processor;

The barcode data processor is configured to receive an electrical signal converted by the photosensitive receiving tube, and perform data decoding on the electrical signal to obtain information stored by the scanned barcode.

Specifically, the mounting assembly includes a card holder that is slotted with the light source, and a plurality of accessories that secure the laser diode to the card holder.

Preferably, the barcode data processor is a 32-bit ARM processor.

Still further, the bar code scanning device further includes a one-piece structural casing, and the front surface of the seat structure casing is made of a transparent material through which a laser beam can pass normally.

The omnidirectional high-speed laser bar code scanning device provided by the invention provides a light source slot by every 120 degrees around the base shell, and a laser diode is installed as a laser light source in each light source slot, and each laser is The diode is matched with optical structures such as a light-emitting mirror, a light-receiving mirror, a rotating mirror group, and a ring-shaped mirror group. Therefore, after multiple reflections, the laser beam (ie, the scanning line) generated by each laser diode is at least Covering the scanning area of 120 degrees, the three laser light sources can project a 360-degree omnidirectional scanning line optical network, and the barcode to be tested placed in the scanning line optical network can be identified without intentionally aligning the scanning lines; When the rotating mirror group has a hexahedron mirror and the loop mirror group has a nine-sided mirror, the laser barcode scanning device provided by the invention can generate a 54-line scanning line optical network, thereby improving the barcode recognition effect; The scanning speed of the device can be controlled by controlling the rotational speed of the rotating motor in the rotating mirror group, when the scanning speed of each scanning line When the second line 30, the present invention provides a scanning apparatus scanning speed of 4860 available lines / sec. Therefore, the omnidirectional high-speed laser bar code scanning device provided by the invention has the advantages of wide scanning range, fast scanning speed, high line number and good bar code recognition effect. DRAWINGS

1 is a schematic diagram of a scanning line optical network formed by a conventional laser scanner; 2 is a schematic diagram of a scanning line optical network improved by a conventional laser scanner in the prior art; FIG. 3 is a perspective structural view of an embodiment of an omnidirectional high-speed laser barcode scanning apparatus provided by the present invention;

4 is a front view of the omnidirectional high-speed laser bar code scanning device provided in FIG. 3 of the present invention; FIG. 5 is a partial cross-sectional view of the omnidirectional high-speed laser bar code scanning device provided in FIG. 3 of the present invention; A schematic structural view of a mounting assembly in an omnidirectional high speed laser bar code scanning device;

Figure 7 is an exploded view of the mounting assembly of Figure 6 of the present invention;

Figure 8 is a schematic view showing the structure of the rotating mirror group provided in Figure 3 of the present invention;

9 is a schematic diagram of a scanning line optical network formed by the omnidirectional high-speed laser bar code scanning device provided in FIG. 3 of the present invention;

Figure 10 is a schematic view showing the bottom structure of the omnidirectional high-speed laser bar code scanning device provided in Figure 3 of the present invention;

Figure 11 is a block diagram showing the structure of a seat structure of the omnidirectional high-speed laser bar code scanning device of Figure 3 of the present invention. detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings in the embodiments.

The structure of the omnidirectional high-speed laser bar code scanning device provided by the present invention will be described in detail below with reference to Figs. 3 to 11 .

3 is a perspective view showing an embodiment of an omnidirectional high-speed laser bar code scanning device provided by the present invention; FIG. 4 is a front view of the omnidirectional high-speed laser bar code scanning device provided in FIG. 3 of the present invention; Figure 3 is a partial cross-sectional view showing the omnidirectional high speed laser bar code scanning device.

In this embodiment, preferably, the barcode scanning device is configured to scan and identify the one-dimensional barcode and/or the two-dimensional barcode.

In this embodiment, the omnidirectional high-speed laser barcode scanning device includes: a base housing 100; a recess 101 is defined in the middle of the base housing 100, and the base housing 100 is provided with three different angles of light source surrounding the recess 101, that is, the The base housing 100 is provided with three light source slots around the groove 101 (the first light source slot 102-1, the second light source slot 102-2 and the third light source slot 102-3, respectively). And preferably, the adjacent light source slots are at an angle of 120 degrees with each other; that is, the first light source slot 102-1, the second light source slot 102-2, and the third light source slot 102-3 are in a mathematical form. It can be used as the three vertices of an equilateral triangle.

The omnidirectional high-speed laser bar code scanning device further includes three laser diodes (including a first laser diode 201-1, a second laser diode 201-2, and a third laser diode 201-3), respectively, through a mounting component - Correspondingly fixed in the light source slot, respectively for generating a light beam and projecting out in a predetermined beam projection path; specifically, the first laser diode 201-1 is mounted on the first light source through the first mounting component 202-1 The second laser diode 201-2 is mounted in the second light source slot 102-2 through the second mounting component 202-2; the third laser diode 201-3 is mounted through the third mounting component 202-3 In the third light source slot 102-3.

The wavelength of the emitted light beam of each of the laser diodes is preferably 650 nm (nanometers). Since the power density of the 650 nm low-intensity laser is much smaller than the damage threshold of the human body and blood, laser irradiation with a wavelength of 650 nm does not cause irreversible damage to human tissues, and even long-term exposure will not bring the human body. Any danger.

6 is a schematic structural view of a mounting assembly in the omnidirectional high-speed laser bar code scanning device provided in FIG. 3 of the present invention, wherein FIG. 6 is a perspective view of the mounting assembly; FIG. (b) is a side cross-sectional view of the mounting assembly. Referring to Figure 7, there is shown an exploded view of the mounting assembly of Figure 6 of the present invention.

In the present embodiment, the structures of the respective mounting components for mounting the laser diodes on the corresponding light source slots are the same, and the structure of the respective mounting components is illustrated by taking the first mounting component 202-1 as an example.

Preferably, as shown in Figure 7, the mounting assembly includes a card holder 2024 that is slotted with the light source, and a plurality of accessories that secure the laser diode to the card holder. Specifically, the fitting of any one of the mounting components may include a connecting wire 2021 and a gasket 2022. The laser diode 2023 is fixed to the connecting wire 2021 through the gasket 2022. Preferably, the laser wire 2021 is FPC (Flexible). Printed Circuit, flexible circuit board; specifically, the laser diode 2023 is built in the card holder 2024, and the card holder 2024 can be fixed to the base housing 100 by screws 2025; Further comprising a spring 2026 for adjusting the focal length, and a cover sheet 2027, a lens 2028 and a laser head 2029 covering the laser diode 2023, wherein a circular hole (not shown in FIG. 7) is disposed at a top position of the top of the laser head 2029 to Constrains the direction of emission of the laser beam.

In this embodiment, a laser diode is respectively built in each of the light source slots; a light projecting mirror and a light collecting mirror are respectively disposed above each of the light source slots; the light collecting mirror is disposed at In front of the light-emitting mirror, an opening is disposed in a middle portion of the light-receiving mirror; and a light-emitting mirror and a light-receiving mirror above each of the light source slots are preferably mounted on the mirror bracket On the base housing.

Specifically, as shown in FIG. 3, the omnidirectional high-speed laser barcode scanning device further includes three mirror brackets (including a first mirror bracket 301-1, a second mirror bracket 301-2, and a third mirror). The brackets 301-3) are respectively mounted on the corresponding light source slots in response to the light source slotting; specifically, the first mirror bracket 301-1 is disposed in the first light source slot 102- 1 is above; a second mirror bracket 301-2 is disposed above the second light source slot 102-2; and a third mirror bracket 301-3 is disposed above the third light source slot 102-3. Each of the mirror brackets is respectively provided with a light projecting mirror and a light collecting mirror; and the light collecting mirror is disposed in front of the light projecting mirror, and an opening is arranged in the middle of the light collecting mirror. . Specifically, as shown in FIG. 3, the first mirror bracket 301-1 is mounted with a first light-emitting mirror 302-1 and a first light-receiving mirror 303-1; the second mirror bracket 301-2 is mounted thereon. There are a second light-emitting mirror 302-2 and a second light-receiving mirror 303-2; a third light-reflecting mirror 302-3 and a third light-receiving mirror 303- are mounted on the third mirror holder 301-3. 3, and the openings of the central positions of the first light-receiving mirrors 303-1, the second light-receiving mirrors 303-2, and the third light-receiving mirrors 303-3 correspond to the positions of the matching light-emitting mirrors, In order to facilitate the respective light-emitting mirrors to reflect the laser beam of the received laser diode through the corresponding opening.

The omnidirectional high-speed laser bar code scanning device further includes a rotating mirror group 400 disposed at a central position of the groove 101. The rotating mirror group 400 includes a rotating electrical machine 401 and is disposed at the rotating electrical machine 401. a polygon mirror 402 on the side, the polygon mirror 402 is in the rotating electricity The machine 401 is rotated at a preset speed V0 under the control of the machine 401. Preferably, the rotating reflection 400 is a hexagonal prism mirror, and each cylinder is provided with a mirror. The hexagonal prism mirror includes a hexahedron mirror disposed on an outer side surface of the rotating electrical machine, and adjacent mirrors form an angle of 120 degrees with each other; the hexagonal mirror is under the control of the rotating electrical machine Rotate at the preset speed V0.

Referring to Figure 8, there is shown a schematic structural view of the rotating mirror assembly provided in Figure 3 of the present invention; wherein Figure (a) in Figure 8 is a perspective structural view of the rotating mirror group, and Figure (b) is a drawing ( a) a side cross-sectional view of the rotating mirror group; (c) is a cross-sectional structural view of the rotating electric machine in the rotating mirror group.

Specifically, the polygon mirror 402 disposed on the side of the rotating electrical machine 401 is composed of a six-sided mirror, and the adjacent mirrors are at an angle of 120 degrees with each other. As shown in (a) of FIG. 8, the polygon mirror 402 is disposed on the outer surface of the rotary electric machine 401, and is a hexagonal columnar mirror. Each cylinder surface is provided with a mirror, that is, the outer surface of the columnar mirror, etc. Divided into six angles, each side is set with a mirror.

Optionally, the rotating mirror set 400 is further provided with a fixed wire 403 at the bottom of the rotating electrical machine 401 for supplying power to the rotating mirror set 400. Preferably, the wire 403 is implemented by FPC cable. In this embodiment, when any one of the laser beams is projected onto the polygon mirror 402, a scanning line can be reflected on each surface of the polygon mirror 402 by the rotation of the rotating motor 401, and can be controlled by The rotational speed V0 of the rotary electric machine 401 controls the scanning speed of the bar code scanning device.

It should be noted that the polygon mirror 402 provided by the embodiment of the present invention includes, but is not limited to, a hexagonal mirror. The number of mirrors of the polygon mirror 402 can be appropriately increased according to actual needs, and can be on the top of the rotating motor 401. The mirror is arranged to increase the number of scanning lines of the barcode scanning device, thereby improving the recognition effect of the barcode to be tested.

In this embodiment, the omnidirectional high-speed laser bar code scanning device further includes a ring-column mirror group 500, which is composed of a plurality of reflecting lenses of different angles, and is respectively arranged on the boundary side of the groove 100.

Preferably, the ring array mirror group 500 includes three sets of trapezoidal mirror groups arranged on the boundary side of the groove 100 (the first trapezoidal mirror group 501, the second trapezoidal mirror group 502, and a third trapezoidal mirror group 503), as shown in FIG. 4, the position of each set of trapezoidal mirror groups is slotted with the light source - Corresponding, and each set of trapezoidal mirror sets includes three trapezoidal lenses having a predetermined tilt angle. In a specific implementation, since each of the trapezoidal lenses has a certain inclination angle, the shape of the trapezoidal lens may be a trapezoidal reflective lens whose upper bottom side is longer than the lower bottom side.

In this embodiment, the omnidirectional high-speed laser bar code scanning device further includes three light-receiving slots respectively disposed under the rotating mirror group, and the adjacent light-receiving slots are at an angle to each other. 120 degrees, and corresponds to the position where the light source is slotted. Specifically, as shown in FIG. 4, the three light receiving slots are respectively a first light receiving slot 601-1 corresponding to the first light source slot 102-1; and the second light source slot 102-2 Corresponding second light receiving slots 601-2, and third light receiving slots 601-3 corresponding to the third light source slots 102-3; each of the light receiving slots is mounted with a photosensitive receiving tube, wherein , each photosensitive receiving tube is not drawn in the drawing. In this embodiment, the photosensitive receiving tube is a photodiode, which is a photodetector capable of converting an optical signal into a current or voltage signal.

In this embodiment, during the light projecting process, each of the light projecting mirrors is disposed in a forward direction of the beam projecting path, and a light beam generated by each of the laser diodes is projected to a corresponding light projecting mirror. Then, passing through the opening in the light-receiving mirror, projecting on a mirror in the rotating mirror group 400, and forming a 360-degree full through the secondary reflection of the annular mirror group 500 Cover the grid optical network to achieve full-scale scanning of the barcode.

During the light-receiving process, the light-receiving mirror reflects the returned light beam after the barcode scanning onto a mirror of the ring-column mirror group 500, and is collected by the reflection of the ring-column mirror group 500. On the photosensitive receiving tube.

Referring to Figure 9, there is shown a schematic diagram of a scanning line optical network formed by the omnidirectional high speed laser bar code scanning device of Figure 3 of the present invention.

In this embodiment, three laser diodes are disposed at different angles, and the two laser diodes are at an angle of 120 to each other. The rotating mirror group 400 disposed at the center of the annular groove 101 is preferably provided with a hexahedron mirror, and the side surface of the annular groove 101 is preferably provided with a common 9-faced trapezoidal mirror corresponding to each laser diode. Therefore, the present invention provides Each laser light source of the laser bar code scanning device can form 6 x 9=54 laser scanning lines. As shown in FIG. 9, the scanning lines formed by the three laser light sources respectively cover different angle regions, thereby forming 360° omnidirectional coverage. Lattice optical network, improved barcode scanning device The depth of field, the bar code to be tested in any orientation in the scanning optical network can be scanned by the laser beam, so that there is almost no scanning dead zone.

Further, in the present embodiment, the scanning speed of the laser bar code scanning device can be improved by controlling the rotation speed of the rotary electric machine 401. Specifically, when the rotational speed V0 of the rotary electric machine 401 is 30 cycles/second, the scanning speed Vs of the bar code scanning device provided by the present invention is 4860 lines/second. The calculation method is: Vs=54 lines / (week · light source) X 30 weeks / sec 3 light source = 4860 lines / s.

Referring to Fig. 10, there is shown a bottom structural view of an omnidirectional high speed laser bar code scanning device provided by the embodiment of Fig. 3 of the present invention.

Further, the omnidirectional high-speed laser barcode scanning device provided by the present invention further includes a barcode data processor;

In this embodiment, a PCB (Printed Circuit Board) may be disposed at the bottom of the base housing 100, and the barcode data processor and its related peripheral circuits are integrated in the On the PCB board 700. In a specific implementation, the PCB board 700 may further be provided with multiple data transmission interfaces, such as the data network ports 701 703 703 in FIG. 10 , and the barcode information read by the barcode data processor may be transmitted to the external computer through the network cable. Further analysis processing and use are performed; and the power interface 704 of the laser barcode scanning device of the present invention is further disposed on the PCB board 700.

In a specific implementation, preferably, the barcode data processor is a 32-bit ARM processor. The ARM processor is a 32-bit RISC (Reduced Instruction Set Computer) processor architecture with small size, low power consumption, low cost, and high performance.

Further, in this embodiment, the omnidirectional high-speed laser bar code scanning device further includes a one-piece structural housing 800. As shown in FIG. 11, the front surface of the seat structure housing 800 is transparent to allow the laser beam to pass normally. The material is manufactured, wherein (a) of Fig. 11 is a front view of the housing of the seat structure, and (b) of Fig. 11 is a right side view of the housing of the seat structure. The seat structure housing 800 protects the various structures in the bar code scanning device from damage during use.

In a specific implementation, the laser barcode scanning device may further be provided with a buzzer, and the buzzer Various prompt sounds are used as a basis for judging whether the barcode is swept, such as: When a barcode is scanned, the buzzer will sound 1 and the buzzer will give another sound when the scan is wrong. The laser barcode scanning device can also be provided with a wireless communication module, and the barcode data processor can convert the read barcode data into a wireless signal through the wireless communication module, and send it to an external processing device for use or further analysis processing.

The omnidirectional high-speed laser bar code scanning device provided by the invention provides a laser light source (laser diode) at a position 120 degrees around the base shell, and a corresponding light-emitting mirror for each laser light source, The optical structure of the light-receiving mirror, the rotating mirror group and the ring-shaped mirror group improves the structure of the conventional scanning device, and the laser beam is subjected to multiple reflections, preferably 54 scanning lines are derived, and the scanning line is added. The number and the 360-degree omnidirectional scan line optical network, the barcode to be tested placed in the scan line optical network can be recognized without intentionally aligning the scan line, thereby improving the recognition effect of the barcode; and controlling the rotation reflection The rotating motor speed in the mirror group controls the scanning speed of the device. Therefore, the omnidirectional high-speed laser bar code scanning device provided by the invention has the advantages of wide scanning range, fast scanning speed, high line number and good barcode recognition effect.

The above is a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. These improvements and retouchings are also considered. It is the scope of protection of the present invention.

Claims

claims

1. An all-round high-speed laser barcode scanning device, characterized by including:

A base housing; a groove is provided in the middle of the base housing, and three light source slots surrounding the groove are provided around the base housing, and adjacent light source slots are sandwiched between each other. The angle is 120 degrees;

Three laser diodes are respectively fixed in the light source slot through a mounting assembly, respectively used to generate a beam and project it out in a predetermined beam projection path;

Three reflector brackets, corresponding to the light source slots, are installed above the corresponding light source slots; each of the reflector brackets is provided with a light-emitting reflector and a light-receiving reflector; And the light-collecting reflector is arranged in front of the light-projecting reflector, and an opening is provided in the middle of the light-collecting reflector;

A rotating mirror group is arranged at the central position of the groove. The rotating mirror group includes a rotating motor and a polygonal mirror arranged on the side of the rotating motor. The polygonal mirror is on the side of the rotating motor. Rotates at a preset speed under control;

An annular reflector group is composed of a plurality of reflective lenses with different angles, which are arranged in an annular manner on the boundary side of the groove;

And, three light-collecting slots are respectively arranged below the rotating reflector group, and the angle between adjacent light-collecting slots is 120 degrees, and corresponds to the position of the light source slot; A photosensitive receiving tube is installed on each of the light receiving slots;

The light-emitting reflector is arranged in the forward direction of the light beam projection path. After the light beam generated by each of the laser diodes is projected to the corresponding light-emitting reflector, it passes through the opening in the light-receiving reflector. , is projected on one of the mirrors in the rotating mirror group, and forms a 360-degree full coverage grid light network after secondary reflection by the ring mirror group to achieve all-round scanning of barcodes;

The light-collecting mirror reflects the returned light beam after barcode scanning onto one mirror of the ring mirror group, and is collected on the photosensitive receiving tube after being reflected by the ring mirror group.

2. The omnidirectional high-speed laser barcode scanning device according to claim 1, characterized in that each The wavelength of the beam emitted by the laser diode is 650 nanometers.

3. The omnidirectional high-speed laser barcode scanning device according to claim 1, characterized in that the polygonal reflector provided on the side of the rotating motor is composed of six reflectors, and adjacent reflectors are formed into each other. The angle is 120 degrees.

4. The omnidirectional high-speed laser barcode scanning device according to claim 1, characterized in that, the ring array reflector group includes three groups of trapezoidal reflector groups arrayed on the boundary side of the groove, each group The position of the trapezoidal reflector group corresponds to the slot of the light source, and each trapezoidal reflector group includes three trapezoidal lenses with a predetermined tilt angle.

5. The omnidirectional high-speed laser barcode scanning device according to claim 1, wherein the scanning speed of the barcode scanning device is 4860 lines/second.

6. The omnidirectional high-speed laser barcode scanning device according to any one of claims 1 to 5, characterized in that the barcode scanning device is used to scan and identify one-dimensional barcodes and/or two-dimensional barcodes.

7. The omnidirectional high-speed laser barcode scanning device as claimed in claim 6, wherein the barcode scanning device further includes a barcode data processor;

The barcode data processor is used to receive the electrical signal converted by the photosensitive receiving tube, and perform data decoding on the electrical signal to obtain the information stored in the scanned barcode.

8. The omnidirectional high-speed laser barcode scanning device according to claim 7, wherein the installation component includes a card holder that is paired with the light source slot, and the laser diode is fixed in the card holder. Multiple accessories on.

9. The omnidirectional high-speed laser barcode scanning device as claimed in claim 8, characterized in that: The barcode data processor is a 32-bit ARM processor.

10. The omnidirectional high-speed laser barcode scanning device according to claim 9, characterized in that the barcode scanning device further includes a seat-type structural housing, and the front of the seat-type structural housing is made of a transparent material that allows the laser beam to pass normally. Material manufacturing.