DE1940288A1 - Method and device for testing a bottle for foreign bodies - Google Patents

Description

Mitsubishi. Jukogyo Kabushiki Kaiaha _; _ _ I'okio, Japan I. AM. ISII

Method and device for testing a bottle for foreign bodies

The invention relates to a method and a device for the automatic detection of foreign bodies that are deposited on the inner or outer surface of a bottle, for example a bottle for spirits, alcoholic lines baw. -free drinks, milk and the like., and deals in particular with the division of license signals for conversion into individual electrical signals to determine the presence of a foreign body.

-A method for testing bottles has already been proposed in which an inside inspectoscope inserted into the bottle in connection with from the Diffuse light thrown into the bottle on the outside is applied. However, in order to be able to determine a sampling line In this process, devices for lifting and lowering while rotating at the same time are used to pull foreign matter of the bottle, while the test device itself remains in a fixed position < > Since this indoor tester also uses a lens over a considerable amount of light Route is the opening of the lens, i.e. the ratio of the focal length to the incident aperture on one

limited high value, dau the available Liehtmenge ao small. Since the test field of the indoor test equipment is still large, there is a sense of the size of the foreign bodies that can be detected. Since the electrical circuit for the detection of foreign bodies also has a frequency modulation system to improve the signal-to-exchange ratio, the first part orders that not only the setting or adjustment of the circuit is difficult, but that there is also a great loss of light P in the inspectoscope .

The object of the invention is therefore primarily the sheep a procedure and a device for testing a bottle, with soft; the disadvantages of conventional devices are overcome and by one effective means of dividing ν of light signals into ones electrical signals for the purpose of securing, dividing foreign bodies or substances on the surfaces of a bottle is offered.

This object can be achieved according to the invention through use solve an optical fiber bundle, which at. his i, nde ™ can be divided into separate channels, so that the Light signals can then be converted into separate electrical signals / ground. This creates a continuous, created automatically working foreign body locking device, when using the incident Loves an optical fiber strand at the entry end of one using the indoor testing device and optical or light signals separated from the fiber strand divided into separate channels at its: exit end

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are obtained ", which are then converted into eiektriscue signals will. By amplifying and processing these single electrical signals by means of an integrator Entualtenden electrical circuit, which in the test device may be built in, the presence of Foreign bodies of different sizes can be determined. Since in Test device an optical fiber strand is used, can a lens with a larger aperture can also be used, so that a larger amount of Licut is obtained.

Since the optical fiber strand is also divided at its exit end, it subdivides the area of the test field, see above that in each of the partial areas the change in the amount of light caused by foreign bodies is the higher change ratio can be determined. :

Another advantage achieved by subdividing the test field is that smaller areas or points of foreign matter can be detected. As a result of the subdivision of the test field, the ratio of signal to noise is so large that the signal processing approach can be simplified. Since the optical fiber strand and the electrical circuit are combined in a single instrument that can be raised and lowered inside the bottle, mixing of thimble caused by external sources with the detector signals is avoided, also by using an integrator circuit in the output of a phatoelectric converter bEv, ^r . Transductor in this novel method for testing bottles an improved ratio of signal to house is obtained.

009809/112 T

1940283

The various novelties that characterize the invention Features are particularly emphasized in the claims forming part of the description. The following is the invention is explained in more detail in a preferred exemplary embodiment with reference to the drawings for better understanding. Show it:

1 shows a partially broken longitudinal section a place en test applies to the characteristics the invention,

rig. 2 is a cross-sectional rush along the line II-II in Figure 1, in the direction of Pf, seen

Fig. 3 shows a cross section along the line III-III in Fig. 1, seen in the direction of the arrow,

FIG. 4 shows a cross section along the line IV-IV in FIG. 1 i (. 5 a section along the line V-V in Fig. 3 »

6 shows a block diagram of an in the test device according to FIGS. 1 to 5 built-in electrical circuit,

FIG. 7 shows a detailed drawing of a circuit in accordance with FIG Fig. Ο provided integrator circuit,

8 and 9 are graphical representations of input and output waveforms of the circuits according to FIG. 7f

Fig. 10 is a partial side view of the upper part of the invention Device in * whose housing the electrical Circuit built-in,

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_A "■ ^ß ÄD ORIGINAL 009809/1127 -,

Pig. 11 a TeilaeiJ; enan3icOt der ir < a bottle introduced testing device and

FIG. 12 shows an illustration of the test field of the device according to FIG. 11, showing the manner of division of the test field by means of an optical fiber strand.

The embodiment shown in FIGS. 1 to 5 of an al * Inspectoscop beüeichenbaren bottle testing device with the features of the invention has a housing in the form of a lengthwise Rohrceils 3, at the upper end of which two connection parts 1 and ^ are provided, of which the Anaahlussteil 1 is fitted over the upper end of the pipe part 3 and fastened to the latter by means of screws.

The liohrteil 3 is in the axial direction of an optical Fiber strand 4 passes through and has a sleeve 5 at its lower end, which extends under the lower or »light entry end of the optical fiber strand 4 extends and an objective lens 6 holds. Below the lens 6 is the sleeve 5 open on one side and holds a mirror 7, the at an angle of 45 ° with respect to the plane of the Lens 6 is arranged and provides an image of the side surface of a bottle to be tested «

Within the Haupttsils of the pipe part 3 is a link 2 ' as a holder for the optical fiber strand 4 »" which enters the connecting part 1 at the upper End® dss Eobx part 3 and there in three separate “distances from each other

owning sections 4a, 4b and 4c ajfivided iac, the ends of which in the at the top; de3 connection U-Qa 1 fixed connection part 2 v ^ rgeseh · ι en end pieces 2a, Vi and 2c are fixed.

A transparent glass pane 8 is arranged on the upper side of the connection part 2, which extends over the exit ends of the three sections 4a, 4b, 4c of the optical fiber strand 4 and on its surface in alignment with the exit ends of the optical fiber optic sections 4a, 4b , 4c three ρκ to ■■ ler'tripcue War / iler 10a, 10t and 10c are arranged, which are insulated from one another by means of an insulating body 9. Gem ^? '·. li _f;. 5 ainl the glass pane ,, the Ί / ar.ileriOa, 10b, 10c uiA the insulating body j ix. an underside arrangement ^T > in _{tj of} an outer connecting part 11 which is mounted on the top of the connecting part 2. Lines 12a, 12b or 12c connected to transducers 10a, 1Or, 10c go from connecting part 11 to the outside.

The block diagram according to Pig. 6 shows di ^ electrical circuit for processing the ^{aogegebrr ^ rr electric signals from the photoelectric wall 1} err 10a, 10b, 10c, which are fed to a logical OR circuit 2J5 after they are successively amplified 20a, 20b and / or . 20c, integrators 21a, 21b or 21c and Eechteckgerieratoren 22a, 22b or 22c have passed through »In addition, a part of the signal supplied by the converter 10a, bypassing the amplifier 20a, the integrator 21a and the Hechteck generator 22a via a branch circuit containing a DC amplifier 24 the logical one. ODEii circuit 23 is supplied. The output of the logical a OBEE switch

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device 23 is connected to a logic UIQ) circuit 26, the second input of which is connected to the output of a flip-flop circuit 2 ^l j for determining the test positions on the bottle. The ν · η of the logical AND circuit 26 canceled signal is fed to a memory circuit 27, which can be canceled by means of a reset pulse generator 28.

The structure of the integrators 21a-21c is shown in more detail in FIG. Each integrator 21a, 21b or 21c has two silicon transistors T ₁ and T ₀ , whose collectors are connected to a voltage source via resistors R ₁ and R, and their emitters via resistors R ₂ or R are connected, so that the transistors T ₁ and Tp work in emitter follower _{circuit after the resistors R 1} , R ₀ are selected to be small compared to the resistors R ,, R ^,. Between the emitter of the transistor T ₁ and the base of the transistor Tp there is a Sili2im.i-diode D ₁ , which prevents a current flow through the resistor Rp * if there is a parallel to this Ί / iderstaiid Kp and the diode D ₁ Capacitor C _{1 is} charged. A second capacitor Gp is connected to the emitter of the transistor Tr.

Fig. 10 shows: an overall view of the inside test device and the electrical circuit existing instrument. The Iimen test device 31 has on her upper end a connector 32 and a housing 33 for receiving the electrical circuit, from which a Cable 34 is led out for connection to a power source, not shown. In Fig. 11 is the testing device 31 shown inserted into a bottle 35 and

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arranged in such a way that they the side surfaces of the Bottle is able to test, whereby the test field 36 according to FIG. 12 over the mirror 7 upwards to the light entrance end of the optical Paserstrangp 4- is reflected.

When the device is in operation, the side surface of the bottle 35 to be tested is imaged by the reflecting mirror 7, which is arranged at an angle of 45 ° with respect to the objective lens L. Since the lens 6 bundles the image onto the light entry end of the optical fiber strand 4, the area of the bottle side wall located in the test field 36 is fixed by the light entry end of the fiber strand. The image is broken down into three sections by dividing the optical fiber strand 4 and passed to the exit ends 4a, 4b, 4c of the optical fiber strand without optical interference or mutual interference between the individual sections. In other words, every change in the amount of light thrown by the mirror 7 onto the light entry ends of the "optical fiber strand 4" appears as a difference in the amount of light at the upper or exit ends 4a, 4b, 4c optical fiber strand 4..

The variable amounts of light appearing at each of the exit ends 4a-4c of the optical fiber strand

be over

the glass pane 8 on the oppositely arranged Photoelectric converters 10a, 10b and 10c transmitted, which converts them into electrical signals, which then

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further processed by the electrical circuit according to FIG. 6 v / earth. More specifically, those received by the three sections of the optical laser strand 4 are received Signals through the amplifiers 20a, 20b, 20c, the integrator circuits 21a, 21b, 21c and the rightsok generators 22a, 22b, 22o of the logical OR circuit 23 fed, which provides an output signal, which at Occurrence of a corresponding signal from the UHD logic circuit 26, which is released by the flip-flop circuit 25 for storage in the memory circuit 27 is passed.

With this arrangement, the signals emitted by the multivibrator are used to determine the test position The bottle 35 · Tuck signals are throughout the whole Test processes generated. In the moment in which one Signal on one connected to the memory circuit Zurüokweiesohaltung is transmitted, the reset pulses generating circuit 28 sur delivery of a Bücketeilimpulses to the memory circuit 2? caused.

The DC amplifier 24 operates when the photoelectric conversion element 10a is kept in the dark state, and regardless of the Prüfpoeition on the bottle 35. In other words, this circuit works when no change in measured by the optical fiber strand Amount of light is present because the entire side surface of the bottle 35 with foreign matter such as cement or

i.

Adhesive, is covered.

If, for example, a Signal from amplifier 20a to the base of the Iransisx: rs

009809/1121

T _{1 is} applied and a current flows in via its collector, this current flows through the resistor H ₂ and the diode D ₁ . However, the ratio between the _{currents flowing through the diode D 1} and the opposing + and R ₂ is small * because the diode D _{1 has} a much lower intrinsic resistance than the resistance H ₂ ι so that the largest rope of the collector string over the diode D ₁ flows and charges the capacitor C. · The _{electrical charge stored in the capacitor C 1} is discharged through the resistor H., but the discharge time is comparatively long because the resistance value of the resistor Ii. is great. The charging characteristics of the capacitor C ₁ therefore have a very short charging time and a long discharging time. The voltage across the charged capacitor O ₁ with respect to ground is impressed on the base of the transistor Tg, whereupon this becomes conductive, and the voltage drop across the resistor H. is fed to a Hechteck generator 22a in the next stage of the electrical circuit.

In FIG. 8, the waveform of the signals originating from a tested pulse and fed to the integrators 21a-21c, together with the bulk level, is shown by way of example. Ereiehlioherweise the signal S _{1 is} greater than the Bauschbzw. Interference signal K ₁ , while signal S ₂ , seen in absolute terms, is greater than interference signal N ₂ . However, since the amplitude of the signal S _{2 is} smaller than that of the interference signal IL above a predetermined reference _{potential, only the signal S 1} and not the signal can. S _{2 are} transmitted because its amplitude is below .'- a_c .ier ^ eni ^^ L of the interference signal Ii ₁ , as a result, a waveform is subject

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009809/1127 ORIGINAL BATHROOM

of the kind shown in Fig. J, at times of linear variation and su other times of variation due to the shape of the bottle being tested. The signal-to-noise ratio% In other words, even v / hen jederaeit is sufficiently large, it may happen that one and the same foreign bodies may be depending on its site of deposition of time detected over the entire area over the bottle or not detected. The integrator 21a, 21b, 21c serves to eliminate this disadvantageous effect.

According to FIG. 10, the testing device 31 and the electrical circuit in the same housing, sa that they as liinixi.it can be raised and lowered. The flexibility of the cable 34 supports the vertical mobility of the test device.

In Figs. 11 and 12 the mutual "" box is from Test field 36 of the surface of the bottle and light entry end of the optical fiber strand 4 indicated. During the The test procedure is the bottle 35 with simultaneous lifting and lowering the test device 31 in rotation, to scan the side surface of the bottle in a spiral. Since the entire test field in a vertical direction is not reduced, there is no need to increase the speed of the bottle relative to the speed the perpendicular movement. In other words, the entire test field is not covered by the optical Fiber strand scanned; rather, the optical one transmits Fiber strand 4 shows the change in light and the amount of light of the image projected onto the slit-like surface. The size of the test field is therefore determined by the size of the

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divided sections of the optical fiber strand 4 determined. If a small foreign body area is also to be detected, this can be done by increasing the number of individual sections happen in a given test field · If, for example, the surface of the foreign body of the surface one of the individual dimensions of the optical fiber strand corresponds, the transmitted via this section can be Change the amount of light to a very large extent. However, it should be noted that the area of the foreign body and the Area of the end of the optical fiber strand related to each other by a P factor as the objective lens is arranged between them.

Since an optical fiber strand is provided instead of a lens in the shaft of the testing device, the loss of light can be reduced be reduced by about 50 # by the Also, division of the optical fiber strand can make a large change in the amount of light for different SizeX ° Foreign bodies present in the side surface of the bottle achieve, these foreign bodies being detected by means of a very simple electrical circuit can.

If the signal is considerable due to a foreign object Size is evoked; also becomes the image on the end faces of the separated optical fiber strand sections thrown so that the transducers in question are operated simultaneously and in this case a greater number emit signals, thereby avoiding incorrect actuation.

By using the integrator circuit, one of the two

009809/1127

Bulky or interfering signal and the one originating from a foreign body Signal can be distinguished, since the latter signal only occurs once for each revolution of the bottle is generated, in accordance with the one-time only Occurrence of light and dark areas during the bulk signal, for example in the form of signals as a result of letters or sequence printed on the bottle an uneven surface configuration of the bottle every revolution at least »occur several times and therefore would be received one after the other, so that these signals are stored in capacitor C. as shown in FIG and would not appear as an output signal. Consequently becomes only the real »from a foreign body caused signal transmitted through the test device

The mechanism of the test device according to the invention is very simple, with only the bottle being rotated is raised or lowered while the tester is raised will. As the test fixture and the electrical circuit are installed in one and the same housing, requires the Device does not have a lead and is hardly exposed to any externally induced bulking signals.

As mentioned, according to the invention, a lens bit with a larger aperture can be used, so that a larger amount of the incident light can be recorded by the test device can. By dividing the optical fiber strand at its exit end, it is possible to send single signals that are converted into electrical signals. By separately amplifying and processing these signals in an electrical circuit, the bottle can be operated effectively

009809/1121

being checked. Since, in addition, the ptical fiber rank its outlet end subdivided to the area of the Reducing the size of individual test fields can reduce the change in the incident UeLt quantity caused by foreign bodies can be detected as a relatively larger change, so that even small amounts of foreign matter are detected can. By using the Integratorachaltuii ^ · the signal-to-house ratio is also improved, which is a particularly advantageous method of testing is guaranteed by bottles *

In summary, the invention therefore creates a device for the detection of foreign bodies or foreign matter on the surface of a bottle. This device having an optical Faeeratrang is in the Bottle inserted with an incident beam of light directed onto the incident end of the fiber strand. in the Inside the device, the optical fiber strand is on its exit end divided to separate optical Signals 8 «that convert into electrical signals for display the presence of foreign objects.

009809/1121

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Claims (1)

Claims Procedure for testing a bottle for foreign bodies or foreign matter adhering to its upper surface, in the case of w XLc hem to indicate the presence of free bodies on the bottle surface, light emitted by a light source inside the bottle. ..χ: is caught, characterized in that the received light is divided into a number of separate channels and converted into a separate electrical signal in each channel and that the electrical signals for indicating the presence of foreign bodies on the bottle surface are amplified. processed . Method according to claim 1, characterized in that the bottle to be tested is rotated around a vertical axis, while the receiver for the light at the same time is moved in a vertical direction to continuously individual sections of the bottle surface to consider. Method according to Claim 1, characterized in that the received light reflects and emits it several light guide channels is thrown and that the light guide channels are divided at their exit ends will" Device for carrying out the method according to one of the preceding claims with one in the interior 009809/1127 The test device that can be inserted into the bottle to be checked, with a rural housing, characterized in that that in the housing a lengthwise running optical fiber strand with several separate, transverse distances from one another own light exit end a device which the incident light in the light entry end of the optical fiber strand reflected, and means for receiving the light from the separate Lichtauatrittsenden the optical fiber strand are provided, which the light in electrical Signals indicating changes in the amount of light received due to the presence of foreign objects on the bottle surface UB.vand.eli ». o » Device according to claim 4, characterized in that the housing has a longitudinally extending tubular shaft, a connector mounted at one end to hold the light exit ends of the optical fiber strand and a sleeve attached to the other end of the Eoheechafts, which extends outwards over the light entry end of the optical fiber strand extends out. 6, device according to claim 5 »characterized in that that in the sleeve an objective lens for .pla delung of the light on the light entry end of the optical Fiber strand is arranged 7. Apparatus according to claim 6, characterized in that the incident light reflecting device is a reflective mirror mounted below the lens at an angle to its plane is, and that the sleeve has an opening for admitting the -17-009809 / 1127 BATH incident light to the mirror having »the light passing through a lens to the incident end of the optical Fiber strand is directed. b. Apparatus according to claim 5, characterized in that the connecting socket part has several end pieces which are arranged at a transverse spacing from one another and which each hold a separate exit end of the optical fiber strand. 9. Apparatus according to claim 8, characterized in that the connecting part carries a transparent glass pane, ^j (fie extends across the separate Liohtaustrittsenden arranged in the end pieces of the optical fiber strand »and that photoelectric converters are provided on the side of the glass pane opposite the light exit ends , which are each arranged opposite one of the Liohtaustrittsenden of the optical fiber material on the other side of the glass pane. 10. The device according to claim 9 »characterized» for this, continue on the top of the AnsohluSteiis Connection part is mounted »which contains an insulating body and that the transducers are spaced apart from one another are arranged in the insulating body and are kept at a distance from one another by this. 11. The device according to claim 10, characterized in that that to the converter a multi-core insulated cable is connected, which is insulated passed through the outer connector. 009809/1121 -1Ü- 12. Vorricntung according to claim 9 »characterized by, da / 3 each converter in series with an amplifier, tr an integrator "and a square-wave generator is and that the square wave generators to a common logic OR circuit «! are closed, the output of which is connected via a logic UIJD circuit a memory circuit is connected. 15. Device according to claim 12, characterized in that that a second input of the logical AND circuit to a toggle switch to determine the test positions is connected to a bottle to be tested 14. Device according to claim 13, characterized in that that part of the signals supplied by one of the photoelectric converters via a direct current amplifier is fed directly to the logical OR circuit. 15 · Device according to claim 14, characterized in that that a reset pulse generator for resetting the memory circuit is connected to the memory circuit is. 009809/1127 Blank page