RU120798U1 - PORTABLE READING DEVICE FOR READING AND DECODING DIRECT DRAWING SYMBOLS, INCLUDING WITH MIRROR SURFACES - Google Patents

Abstract

A portable reading device for decoding character marks of direct application, including from mirror surfaces, including a housing with a trigger assembly, an optical part consisting of a lens and an illumination unit, hardware and software made in such a way that the illumination unit of the scanner is made with additional light a cone-shaped nozzle made of matte material with built-in LEDs and fixed on the outside of the lighting chamber to significantly increase the illumination area with diffused light flux and use a unique lighting control algorithm for the external ring illuminator in combination with diffuse lighting in general.

Description

This utility model relates to portable readers (scanners) designed to “capture” and decode barcodes of various types, including symbolic labels of direct application (SMPS), applied to individual parts and components of products, in order to identify and track their life cycle.

The emergence of demand for SMPS has led to the creation of new technologies for “reading” such marks, since the scanners working on the previous technologies have proved incapable of decoding SMPS tags, especially those applied on specular and specular surfaces.

It is well known that a barcode scanner is a device that reads a barcode printed on the packaging of a product or the product itself and transfers this information to a computer, cash registers, POS terminals, etc. Barcode scanners are widely used in the field of trade and services for quick identification of goods, during holidays, warehousing, etc.

It is also known that by type of execution the scanners are divided into manual scanners, which the operator brings to the barcode to be read, and stationary scanners, which are fixed in one place, in which case the object marked with a barcode must already be brought to them.

The layout of the proposed scanner includes: a housing with a trigger assembly and light-sounding operator information elements, such as a buzzer, several LEDs of various colors, an optical part, consisting of a two-lens lens, an original design lighting unit with an additional diffuser cone-shaped ring, an apparatus part, consisting of several printed circuits with various components (DSP processor, input / output devices, etc.), optical sensor, general purpose software (for images, turning on / off the LEDs of the lighting unit having unique properties (for example, ultraviolet and infrared light) for decoding SMPS tags, while the scanning module built into the housing has a lighting chamber consisting of two lighting systems - external and internal, creates a diffuse light flux illuminating SMPS.As mentioned above, this utility model is primarily intended for reading and decoding symbol labels direct application (SMPS) ennyh into separate parts and jewelry sets.

The developed housing design differs significantly from the design of most scanners, including the closest competitors in decoding efficiency of direct-applied symbol labels: Cognex DataMan 7500 http // www.cognex.сot. US patent No. 6,330,974, 12/18/2001, portable reader for decoding character labels for direct application of a patent of the Russian Federation for utility model No. 96992, 09/09/08, patent application US 2011100842 A1 Barcode scanner, with the function of switching the read resolution during scanning , where a reader is described - an optical-electronic scanner, which includes a housing with a window and an electro-optical element located outside the window. At least two laser diodes providing laser beams are located outside the housing near the window. The rays intersect in the field of view of the optoelectronic elements, and the beams provide light to the electro-optical element through the window, which is reflected from the symbol located at the intersection point (Patent US 6,330,974).

In the application US 2011089242, 04/21/2011 another scanner for reading a bar code is described having a switching module for scanning (reading) bar codes with high resolution or low resolution. The closest in technical essence to the claimed utility model is a portable reader for decoding barcodes of various types, including symbol labels of direct application, made so that the handle of the case is located behind the case and smoothly passes into it, and the optical and hardware parts are made so that the pulses of the target designation LEDs of the lighting unit of the optical part do not coincide in time with the pulses of the backlight LEDs, and choose the optimal lighting level Xia automatically by adjusting the current in the LED backlight, the light used for including LEDs with a narrow spectral emission range (RU 96992 20.08.2010). Known portable reader is not effective enough for reading direct application marks, especially from mirror surfaces. The technical objective of the claimed utility model is to increase the efficiency of reading and decoding symbol labels of direct application, including from mirror surfaces. The stated technical problem is achieved by the fact that a portable reader for decoding direct-printed symbol labels is declared, including from mirror surfaces, including a housing with a trigger assembly, an optical part consisting of a lens and a lighting unit, hardware and software, performed as follows that the scanner lighting unit is made using an additional diffuse light cone-shaped nozzle made of a matte material with integrated LEDs, and which mounted on the outside of the lighting chamber to increase the coverage of the diffused light stream and provide an algorithm for controlling the lighting of an external annular illuminator in combination with diffuse lighting in general. In a portable reader device for decoding symbolic labels of direct application, claimed as a utility model, the pulses of the target designation LEDs of the lighting unit of the optical part do not coincide in time with the pulses of the backlight LEDs.

The proposed utility model is new and industrially applicable. The developed housing design differs significantly from the design of the known scanner housings, see Fig. 1 General view of the scanner housing with an additional scattering cone-shaped ring, Fig. 2 Scheme of the formation of an additional diffused light flux to expand the read zone

1. The scanner.

2. Lighting chamber.

3. Diffuser cone-shaped nozzle with integrated LEDs.

4. LEDs.

5. Luminous flux of diffuse lighting.

The scanner is equipped with two LED systems, alternately switched on, a red system and a cyan system, and invisible (for example, sympathetic inks) become visible only under UV lighting, and the character labels initially visible under normal lighting are supplemented by information from the invisible part, which allows to decode the entire character mark in full volume.

The engineering design of the illuminator is a two-chamber device that provides diffuse illumination, both at a small (less than 45 degrees - lower camera) and at a large angle (upper camera), which allows you to confidently read SMPN from any surface, including mirror and high reflectivity.

With the scanner’s existing lighting system, the external annular illuminator is turned off during the reading of labels to prevent bright glare due to reflection of the light flux, and only diffused light coming from the internal illumination chamber through the opening of the external annular illuminator is used. Thus, the resulting light spot of the scattered light is actually limited by the hole of the external annular illuminator, which makes it difficult to read marks commensurate with the light spot. The lighting zone with diffused light flux in the proposed design is expanded due to the use of a special conical nozzle, for example, from a matte transparent material with LEDs and fixed from the outside of the lighting chamber. To increase the depth of field of the optical system, the scanner uses the phenomenon of the dependence of the refractive index of optical glass on the wavelength, while the use of two LED systems (red system and blue system) allows one to obtain different focal lengths and accordingly different sharpness ranges. In order to point the scanner at a readable bar code, the light from two powerful LEDs passes through special lenses installed in front of them, then through the front optical cover and forms two bright spots on the subject. The pulses of the glow of the target designation LEDs do not coincide in time with the pulses of the glow of the backlight LEDs, so they are not visible in the image of the barcode received for decoding. The most suitable type of label illumination suitable for subsequent digital processing is diffuse illumination.

The proposed scanner design employs an optical diffusing cone-shaped nozzle with built-in LEDs, which allows to significantly increase the area of reliable reading of the SMNP, including from flare-forming surfaces, using a unique algorithm for controlling the illumination of an external ring illuminator in combination with diffuse illumination as a whole.

The aiming system, which is part of the scanner, allows the operator to confidently place the decoded mark in the field of view of the scanner.

Claims (1)

A portable reader for decoding direct-printed character labels, including from mirror surfaces, including a housing with a trigger assembly, an optical part consisting of a lens and a lighting unit, hardware and software, so that the scanner lighting unit is made with additional light cone-shaped nozzle made of matte material with integrated LEDs and mounted on the outside of the lighting chamber to significantly increase the lighting area diffused light flux and the use of a unique algorithm for controlling the illumination of an external annular illuminator in combination with diffuse illumination as a whole.