CS224034B1

CS224034B1 - Integrated optoelectric scanning unit

Info

Publication number: CS224034B1
Application number: CS29682A
Authority: CS
Inventors: Emanuel Zajac
Original assignee: Emanuel Zajac
Priority date: 1982-01-14
Filing date: 1982-01-14
Publication date: 1983-12-30

Description

Vynález sa týká integrovanej optoelektrickej snímače) jednotky určenej na snímanie kvality povrchu, štrukturálnych chýb, farebnosti apod., rovinných ploch dřeva a iných materiálov.The present invention relates to an integrated optoelectric transducer for detecting surface quality, structural defects, colouration and the like, planar surfaces of wood and other materials.

V súčasnosti ea používajú rožne zariadenia na snímanie kvality rovinných plóch. Princip týchto zariadení spočívá prevážne na funkcii svetlocitlivých polovodičov alebo fotoodporov, keď k osvetleniu snímaných ploch sa používajú zváčša klasické zdroje světla, ako sú vláknové žiarovky, halogenové žiarovky, žiarovky apod., niekedy tiež lasery. Tieto zdroje světla však vždy tvoria samostatnú časť. Nie sú teda integrovanou súčasťou vlastných snímačových jednotiek.Nowadays ea are using barbecue devices to sense the quality of planar surfaces. The principle of these devices rests mainly on the function of light-sensitive semiconductors or photoresist, when mostly light sources such as filament lamps, halogen lamps, incandescent lamps, etc., sometimes also lasers, are used to illuminate the sensing surfaces. However, these light sources always form a separate part. They are therefore not an integrated part of their own sensor units.

Toto klasické riešenie představuje pri praktických aplikáciách viacero nevýhod, ako je napr. potřeba opticky oddeliť zdroj světla, snímaciu jednotku, ale najma snímanú plochu okolitého prostredia, aby sa ohmedzili rušivé vplyvy sposobené kolísáním intenzity denného alebo umělého osvetlenia pracovných priestorov. Nedostatkom pri využívaní klasických zdrojov osvetlenia snímaných ploch je aj ich malá účinnost', daná tým, že sa musia umiestňovať poměrně daleko od snímanej plochy, aby sa tak dosiahlo jej rovnomernejšie osvetlenie. Přitom na2 priek usmerneniu světelného žiarenia přídavnou optikou a reflektorickými odrážkami rozptyl světla do okolia je značný.This conventional solution presents several disadvantages in practical applications, such as e.g. the need to optically isolate the light source, the sensing unit, but in particular the sensed area of the surrounding environment in order to limit disturbances caused by fluctuations in the intensity of daylight or artificial illumination of the working spaces. The disadvantage of using conventional sources of illumination of the scanned surfaces is also their low efficiency, given that they have to be located relatively far from the scanned surface in order to achieve a more even illumination. In spite of the rectification of the light radiation by means of additional optics and reflective bullets, the scattering of the light into the environment is considerable.

Skór uvádzané nedostatky doposiaf známých zariadení na snímanie kvality rovinných plóch sa odstrania použitím integrovanej optoelektrickej snímacej jednotky podlá vynálezu, ktorej podstatou je také konštrukčné riešenie, že je do jedného celku združená jednak osvetfovacia jednotka, a tiež vlastná snímacia optoelektrická jednotka.The aforementioned drawbacks of the prior art planar surface quality sensing devices are eliminated by using the integrated optoelectric sensing unit according to the invention, which is based on a construction that both the lighting unit and the actual optoelectric unit are combined in one unit.

Osvetfovacia jednotka pozostáva zo žiarovky ako zdroja světla a dvoch skleněných doškových svetlovodov usmerňujúcich světlo zo žiarovky len na úzký pás snímanej plochy, ked skleněné doškové svetlovody sú umiestnené po oboch stranách snímacej jednotky, ktorá principové pozostáva z rady lineárně usporiadaných fotóniek, před ktorými je uložená přídavná optika v tvare valcovej odseče obrátená rovinnou plochou smerom k fotónkám, takže integrovaná optoelektrická snímacia jednotka okrem uvedených vlastností má aj přednosti „Zariadenia na snímanie štrukturálnych chýb dřeva“ podfa čs. autorského osvedčenia č. 206 226, tj. je citlivá na pretiahle chyby a skvrny nachádzajúce sa na snímanej ploché, čo je dósledkom toho, že přídavnou optikou sa povodně kruhová směrová charakteristika fotóniek mění na eliptická.The illumination unit consists of a bulb as a light source and two glass thatched light guides directing light from the bulb only to a narrow strip of sensing surface when the glass thatched light guides are located on both sides of the scanning unit, which in principle consists of a series optics in the form of a cylindrical paragraph facing the photons so that the integrated optoelectric sensing unit has, in addition to the aforementioned characteristics, also the advantages of the "Device for detecting structural defects in wood" according to US. of the author's certificate no. 206,226, ie. is sensitive to elongated errors and spots found on the sensed flat, as a result of the additional optics the flood circular directional characteristics of the photo tubes change to elliptical.

Uvedené přednosti integrovanej optoelektrickej snímacej jednotky možno s výhodou využit pri postupnom snímaní kvality rovinných ploch dřeva, ak sa umiestni bezprotredne nad rovinnou plochou pohybujúceho sa telesa (došky, hranolčeka). Možno ju však analogicky využit aj v iných praktických aplikáciách v oblasti priemyslovej výroby.Said advantages of the integrated optoelectric sensor unit can be advantageously utilized in the gradual sensing of the quality of the planar surfaces of the wood if it is placed immediately above the planar surface of the moving body (thatch, prism). However, it can be used analogously in other practical applications in the field of industrial production.

Na pripojenom výkrese je znázorněný příklad možného technického riešenia integrovanej optoelektrickej snímacej jednotky podlá vynálezu, kde na obr. 1 je zakreslené celkové konstrukčně usporiadanie integrovanej optoelektrickej snímacej jednotky a na obr. 2 je rez A—Á telesom integrovanej optoelektrickej snímacej jednotky.The attached drawing shows an example of a possible technical solution of the integrated optoelectric sensor unit according to the invention, where in FIG. 1 shows the overall design of the integrated optoelectric sensor unit, and FIG. 2 is a cross-sectional view of the integrated optoelectric sensor unit A-A.

Integrovaná optoelektrická snímacia jednotka (obr. 1) pozostáva z dvoch skleněných doškových svetlovodov 1, ktoré sú upravené tak, že ich spodná plocha 2 je voči vonkajšej ploché zešikmená pod uhlom a — = 30° až 45° a horná plocha 3 je v pozdížnom smere zaoblená do tvaru paraboly, keď v ohnisku tejto paraboly je v oboch doškách •vytvořený kruhový otvor 4, do ktorého je zasunutá žiarovka 5. Všetky plochy doškových svetlovodov 1 sú opatřené účinným svetloreflexným náterom okrem plóch 2, cez ktoré světlo zo žiarovky 5 prenlká na snímanú plochu.The integrated optoelectric scanning unit (Fig. 1) consists of two glass thatched light guides 1, which are arranged so that their lower surface 2 is inclined at an angle α to 30 ° to 45 ° with respect to the outer surface and the upper surface 3 is in the longitudinal direction. rounded in the shape of a parabola, when in the focus of the parabola there is a circular opening 4 in both thatch • into which the bulb 5 is inserted. All areas of the thatched light guide 1 are provided with an effective light-reflective coating. area.

Medzi doškovými svetlovodmi 1 je umiestnená vlastná snímacia jednotka pozostávajúca z doškového telesa 6, v ktorom sú lineárně uložené fotónky 7 a před nimi přídavná optika 8 v tvare polvalcovej odseče, ktorá je smerom k fotónkám 7 obrátená rovinnou plochou. Na telese 6 je upevněná aj doska tlačených spojov 9, prostredníctvom ktorej sú fotónky elektricky spojené s konektorom 10, umiestneným na hornej straně telesa 6.Between the thatched light guides 1 there is an actual sensor unit consisting of a thatched body 6, in which the photons 7 and the additional optics 8 in the form of a half-cylindrical section are arranged, which face the photons 7 with a planar surface. A printed circuit board 9 is also mounted on the body 6 by means of which the photocells are electrically connected to a connector 10 located on the upper side of the body 6.

DoSkové svetlovody 1 možno zhotovit bud z organického alebo prírodného skla. Ako zdroj světla možno použiť klasickú vláknová alebo halogenová žiarovku napájanú jednosměrným prúdom. Vhodným fotoeiemetom sú fotónky KP 101, resp. KP 102, popřípadě integrované fotoelementy rady KPX.... Pri použití posledně měno váného fotoelementu je však obmedzenie v konštantnej vzdialenosti fotóniek (2,5 mm), čo je dané ich integrovanou konštrukciou. Velmi priaznivé parametre u integrovenej optoelektrickej snímacej jednotky určenej na snímanie štrukturálnych chýb dřeva možno dosiahnúť napr. ako hrúbka svetlovodných dosák je cca 4 +- 6 mm, šířka cca 4 +- 5 cm a výška 10 +- 12 cm. Požadované osvetlenle snímané j plochy je cca 12.10³ Lx a vzdálenost snímače od snímané] plochy cca 4 +- 6 mm.The light guide 1 can be made of either organic or natural glass. As a light source, a conventional filament or halogen lamp powered by a direct current can be used. Suitable photo-emitters are photocells KP 101, resp. KP 102, or integrated photoelements of the KPX series. However, when using the last modified photoelement, there is a limitation in the constant distance of the photocells (2.5 mm), which is due to their integrated design. Very favorable parameters of the integrated optoelectric sensor unit designed for sensing structural wood defects can be achieved e.g. as a thickness of light-guide plates is approx. 4 + - 6 mm, width approx. 4 + - 5 cm and height 10 + - 12 cm. The required illuminated sensing surface is approx. 12.10 ³ Lx and the distance of the sensor to the sensing surface is approx. 4 + - 6 mm.

Claims

3 224034 Flood-circular directional characteristicsPicture changes to elliptical. The advantages of the integrated optoelectric sensing unit can be advantageously utilized in the gradual scanning of the quality of the planar surfaces of the wood if it is placed immediately above the planar surface of the moving body (thatch, but may also be used in other practical applications in the field). The accompanying drawing shows an example of a possible technical solution of an integrated optoelectric sensor unit according to the invention, wherein in Fig. 1 the overall structural arrangement of the integrated optoelectric sensor unit is shown, and Fig. 2 is a section A— The integrated optoelectric sensing unit (FIG. 1) consists of two glass thatched beams 1 which are arranged so that their lower surface 2 is flatly angled at an angle α = 30 ° up to 45 °, and the upper surface 3 is rounded into the tv in the longitudinal direction A circular parabola 4 is formed in the focus of this parabola, in which the bulb S is inserted in all the thatch. All the surfaces of the thatched skylights 1 are provided with an effective light-reflective coating, in addition to the planes 2 through which the Integrated optoelectric sensing unit characterized in that it comprises two glass thatched beams (1) having a lower surface (2) bevelled with respect to the outer plane at an angle α = ° of 30 ° to 45 ° and provided with an upper surface (3) arranged in the rearward direction. in the focal point of which there is an aperture (4j for the lamp (5), which is temporarily inserted into the openings (4) in both glass thatch light pipes (1), when all the light-water surfaces (1) except The light (5) of the bulb (5) passes over the surface of the scanner. Between the thatched light guides 1, there is provided a self-sensing unit consisting of a thatch body 6 in which the photocells 7 and the additional optics 8 in the form of a half-cylindrical section, which face the photo tubes 7, are rotated in front of them. A printed circuit board 9 is mounted on the body 8 by means of which the photocells are electrically connected by a connector 10 located on the upper side of the body 6. The light guide 1 can be made of either organic or natural glass. The light source can be a single-directional filament or halogen filament lamp. Appropriate photoelemetics KP 101, resp. KP 102, optionally integrated KPX ... photoelements. However, the use of the latter varied the limitation in the constant distance of the photocells (2.5 mm) given by their integrated construction. Very favorable parameters for an integrated optoelectric sensing unit intended for the sensing of structural wood defects can be achieved, for example, as a light guide rake of about 4 + -6 mm, a width of about 4 - 5 cm and a height of 10 + - 12 cm. The required illumination of the sensed area is about 12.103 Lx and the distance of the sensor from the sensed area is about 4 + 6 mm. an effective light-reflective coating, wherein a center-to-center body (6) of the sensing unit core is disposed in the center between the light guides (1), in which the photocells (7) are disposed linearly and additional optics (8) in front of the lower body (6) ) in the form of a cylindrical separator which is rotatable to the photocells (7) by a planar surface and is optically symmetrical thereto when the printed connections (9j serving to connect the phototapes (7) to the connector) are also mounted on the body (6) (10), which is fixed to the body (6), 1 sheet of drawings