CN103761501A

CN103761501A - Laser bar code scanning device

Info

Publication number: CN103761501A
Application number: CN201410053219.8A
Authority: CN
Inventors: 张驰; 王济明; 付彦伟
Original assignee: SUZHOU DEWO INTELLIGENT SYSTEM Co Ltd
Current assignee: SUZHOU DEWO INTELLIGENT SYSTEM Co Ltd
Priority date: 2014-02-18
Filing date: 2014-02-18
Publication date: 2014-04-30

Abstract

The invention discloses a laser bar code scanning device which comprises a scanning body. A laser emitter, a laser reflecting face, a rotary prism, a prism motor and a laser receiver are installed inside the scanning body. The laser emitter emits out lasers with a stable wave band, the lasers are reflected by the laser reflecting face to the rotary prism, and then reflected by the rotary prism to a bar code, finally the lasers reflected back by the bar code are received by the laser receiver, and the rotary prism is controlled by the prism motor to rotate. According to the laser bar code scanning device, an improvement is carried out on the basis of an existing vibrating mirror type scanning device, a vibrating mirror is replaced by the rotary prism to reflect the lasers, the rotary prism is applied to the bar code scanning device, the lasers received by the laser receiver are stable in frequency, the decoding speed is effectively quickened, the first-time recognition and reading rate is effectively improved, and some complex bar codes can be easily decoded through two laser emitters arranged in parallel.

Description

Laser bar code scanister

Technical field

The present invention relates to a kind of bar code scanner, particularly a kind of laser bar code scanister.

Background technology

One dimension Laser Scanning Equipment is mainly the mirror Laser Scanning Equipment that quivers in the market, this Laser Scanning Equipment is difficult for improving sweep velocity, be generally 33 times/second, and recognition rate is first lower, laser is through quivering after mirror reflection, and owing to quivering, mirror wave dynamic frequency is larger, the low numerical value contrast of wave band very high value and wave band is very large, therefore when reflexing to laser pickoff through bar code, can exert an influence to laser pickoff, affect decoding speed and recognition rate first.

Summary of the invention

In order to overcome above-mentioned defect, the invention provides a kind of laser bar code scanister of rotating prism formula, this device can be transmitted into laser in bar code with a stable frequency, improves decoding speed and recognition rate first.

The present invention for the technical scheme that solves its technical matters and adopt is: a kind of laser bar code scanister, comprise scanning body, generating laser, laser reflection face, rotating prism, prism motor and laser pickoff are installed in described scanning body, described generating laser is launched the laser of stablizing wave band, through laser reflection face, reflex on rotating prism, rotating prism again by laser reflection to bar code, finally by laser pickoff, receive the laser reflecting in bar code, described rotating prism is rotated by prism Electric Machine Control.

As a further improvement on the present invention, described rotating prism is the multifaceted prism being at least comprised of three faces, and its each face is plane.

As a further improvement on the present invention, two generating lasers of arranging are side by side installed in described scanning body, described two generating lasers are launched the laser of different-waveband, the laser of described two generating lasers transmitting has different laser beam waist and wave band, the identification degree of expansion of laser light bundle to bar code effectively, thereby increase the decoding efficiency of bar code, also more easily some more complicated bar codes are decoded, the scope of application of laser scanning device is provided.

The invention has the beneficial effects as follows: the present invention improves on the basis of the existing mirror scanning device that quivers, with the rotating prism mirror reflection laser that replaces quivering, rotating prism is applied in bar code scan equipment, the laser frequency that laser pickoff is received is more stable, effectively improve decoding speed and recognition rate first, and this apparatus structure is simple, make simple and easy and with low cost, be applicable to bar code scan field, and two generating lasers of arranging side by side are also more easily decoded to some more complicated bar codes.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention;

Fig. 2 is the schematic diagram of another embodiment of structure of the present invention;

In figure, indicate: 1-scans body; 2-generating laser; 3-laser reflection face; 4-rotating prism; 5-prism motor; 6-laser pickoff; 7-bar code.

Embodiment

In order to deepen the understanding of the present invention, below in conjunction with embodiment and accompanying drawing, the invention will be further described, and this embodiment only, for explaining the present invention, does not form limiting the scope of the present invention.

Fig. 1 shows a kind of embodiment of a kind of laser bar code scanister of the present invention, comprise scanning body 1, generating laser 2, laser reflection face 3, rotating prism 4, prism motor 5 and laser pickoff 6 are installed in described scanning body 1, described generating laser 2 is launched the laser of stablizing wave band, through laser reflection face 3, reflex on rotating prism 4, rotating prism 4 again by laser reflection to bar code 7, finally by laser pickoff 6, receive the laser reflecting in bar code 7, described rotating prism 4 is controlled rotation by prism motor 5.

Described rotating prism 4 is the multifaceted prism being at least comprised of three faces, and its each face is plane.

Rotating prism 4 rotates under the drive of prism motor 5, the laser of being come by laser reflection face 3 is reflexed in bar code 7 with stable frequency, the laser that laser pickoff 6 receives like this will be relatively stable, is conducive to improve decoding speed and the recognition rate first of scanning device.

Embodiment 2: as shown in Figure 2, two generating lasers 2 of arranging are side by side installed in described scanning body 1, described two generating lasers 2 are launched the laser of different-waveband, the laser of described two generating lasers transmitting 2 has different laser beam waist and wave band, two laser beam are opened simultaneously or opened one of them, the identification degree of expansion of laser light bundle to bar code effectively, thereby increase the decoding efficiency of bar code, also more easily some more complicated bar codes are decoded, the scope of application of laser scanning device is provided.

Claims

1. a laser bar code scanister, comprise scanning body (1), it is characterized in that: generating laser (2) is installed in described scanning body (1), laser reflection face (3), rotating prism (4), prism motor (5) and laser pickoff (6), described generating laser (2) is launched the laser of stablizing wave band, through laser reflection face (3), reflex on rotating prism (4), rotating prism (4) again by laser reflection to bar code (7), finally by laser pickoff (6), receive the laser reflecting in bar code (7), described rotating prism (4) is controlled rotation by prism motor (5).

2. laser bar code scanister according to claim 1, is characterized in that: the multifaceted prism of described rotating prism (4) for being at least comprised of three faces, its each face is plane.

3. laser bar code scanister according to claim 1, it is characterized in that: two generating lasers (2) of arranging are side by side installed in described scanning body (1), described two generating lasers (2) are launched the laser of different-waveband, and the laser of described two generating lasers transmittings (2) has different laser beam waist and wave band.