DE1766753C - - Google Patents

Description

let; ^ :. I-: i ".riflir.Li-j- -der Hiiipfänger ^ ruppen mii pre-. ■ given. · '!!" . ·;>. '.: ·' .. - ..! ". E ^ ¹ Si.i '. ^ Erpi.:nk'i.sab>t;'..iil!.;.': Luge. r.::iei und al ■!,! ■>'.eng-' about for the phases Or ia-.ii / oiiJ.üTeren / i.-n?. «! ^: ien deii / ¹ Ae. Fn :: ": ^{|: -:;} -faiiijNiiPiiier ei it subregion provided; ei.i r; w il ot-'L'i ft. of the sub-areas a \ om lo.-Acrtgo. '■ · ■ bor eip> u! b; i: e;' r-lurz / eitgeber provided lsi. .! of th .- "hasten .. ago sequence corresponds to the Wip.kclanordnung the partial area and the Mim liauptabta tter be: ■ its iiitrit ¹ in the respective Teilbe rich gt.-i.-iriei v ird wherein the... Output of the Kur /.; I icitgebers' ias Frcigabesienal for the directional ^{excitation when the time period from the Ir.twer »1} CbCr erinitteketi since the entry of the main scanner into the sub-area has elapsed.

2. Arrangement according to claim I. characterized in that the actual value transmitter ι /., To /, ₄ ) is a measuring arrangement for the phase delay (τ).

3. Arrangement according to claim 2, characterized in that the measuring arrangement serving as an actual value transmitter (/.) For the phase runz.cit (r) consists of a phase meter and a connecting arithmetic unit in which, on the one hand, the phase measuring variable ', ( <·> ■ r). on the other hand the Kreisfreqi.enz (<,>) of the input signal of the phase meter can be entered, and its output variable only depends on the phase delay (τ).

4. Arrangement according to claim 3, characterized in that the arithmetic unit consists of a control loop (130. 132, i.13. 134) in which a monostable multivibrator (130) is \ orges ien. whose duration can be controlled by a voltage (U _Ui ) . of of from Signa, voltage angular frequency (o) derived pulses is triggered and its output voltage which is obtained by a low-pass filter (132) after sieving (i ■ '■ ") μ proportional to the circle ^r requency (u>) and the tilting duration is, in which a difference generator (133) for the voltages of the phase meter and the monostable multivibrator (130) and a DC voltage amplifier (134) are provided, which amplifies the (>> ■ Differcnzspannimg ((>',, ₅ ) and the monostable flip-flop (130) as voltage (U _Ui ) , and that the voltage (ί '11 _Λ ) is the output variable only dependent on the phase delay (τ) .μ

5. Αηοι dining according to one of the preceding claims, characterized in that the short / eggigcber is a monostable multivibrator ilOfii. .lessen tipping time vm 'Au-eang J.es Kt-' ■ .Tl.'e: ~ i.rs (/ i gcsteue ^r ! becomes.

(■. Art'TiiiUinu iiacii An ^ prueii 4 ih! 5. M'.l.ircr. Je-.eiif / eichn-Jt. That the ir.onosii'.bile N! A '^;■>:!■■; ■.: Ίιτ ι 106; _k \ i K ur /, 'e: [i-eiiers and the "''-'V ₁ ^ i ₁ IbUe K1 pii -; .. f .: 1 130) of the arithmetic unit bi ; .m: ^ i: die Kippdiiijer Pe> .nrn. ""ie; iden KiMidens.itorei '.!' jp .'.'- if.-iT:; -. !!! are. ¹ AOb-: " ! the Veri.ii-tn.s of the i \; ip.:, "i: a; ue-". Capacitor in the multi-vibrator (Π) ':, .-' L .: Kapa / i'a ¹ . of the rim capacitor in the Kipp.-ujf-. · ■ i 3U ■ dcic !; the \ 'receipt of the \\ as.serscn.ahge sc'nuindigkc.t / u den. Product; -. Us der Kreiiire d;: ei- .. 'of the main _{scanner and the z :: t} ' ehöri ^ eü akus'.i-.eii.n Sc'r. '. Verpunktsabitand iJ) -der Frnp ianusKiinale; st.

~. Ai'iOrü'.ung according to claim 1. thereby ge k. • -! i -. 'calibrates. since Si the risers of the 7th white f-.iv.pi <n; üska; - ;! l. each sub-area k; eu ^ .veise e ;; - e; since · - direki and on the other hand via Lnu'Veiigiieder .107. 1OS '.ui totalizer (109th! 1Ü! Caught. sciiir.ssen, the two adjoining each other and by half a wave! of the sub-area ge ger.eirrindcr ', replaced directional clubs, and daü dl ·; >. Si recorded by these directional lobes gnaie / ur intensity control of the Siei'tsigr.als \ can be used.

S. Arrangement according to claim 7, characterized in that a gate (113, 114) is assigned to each channel of a Richikeule. which lets through the signal voltage of the associated channel, if at the same time from the main scanner a release signal for the associated receiving channel de = sub-range and from the short timer (Z) an output signal from ^: pending.

^l ). Arrangement according to claim I. It is characterized by the fact that the short-term output which can be set by the actual encoder for each sub-area consists of a coincidence stage (C) and a sawtooth generator (M, the duration of which corresponds to the cycle time of the main scanner (S _A S /.) Through a sub-area, and then the coincidence stage (C) emits the release signal when the breakover voltage has risen to the control voltage of the actual value transmitter.

The invention relates to an arrangement for Rieh determination of incident water-borne sound waves in a large angular range, consisting of a large number of recipients or recipient groups with subsequent receiving channels. which directional characters are assigned to the different to each other bordering angular subareas of the entire angular area. a main scanner for periodic rapid sampling of the received signals of all sub-areas of a device for derivation of Feinpeilwerteu from two reception channels belonging to the same subrange and one Display device with synchronous linkage of the direction display for scanning all sub-areas, esp special by means of the cathode ray of a cathode ray tube.

In an arrangement of this type that has already been proposed (German patent specification 1,566,847), the Fine bearing through interpolation between the amplitudes

>'. ί-. · '■''! ■ Εci.is'.; :: -. ■; ιμ ._- η through, sub- Jüeciliche Ye- ■■ ::: ■ ': -.Γ ;: ι ¹ · i'. ei "i npfangr channels could end up: -.! - heM.-h;!", TiKr Ji-r N-'chtei .. da Ii.! ie Gvnau! gke >> i \: 'Kici'' ^: iirgsan , 'eigi ", i"' ·. '. · .. Z': h! uo ^r ^ -r \ '\ a

e- re.e.cii üheiianrende ::. / or hu .. · poi.itio.i ■ ■■ vn Rvh!.;, Iarak;: - rhiiken a'nliärv - '. Ig i - t ur.d an

■: ι :: '■. ■: "./ cn of a Gt-sa: rr.r \ ^r eiches um · ■■ en; ger a: s

■ e, ί; ';:; u: uiu · lies O'c task zugr.mde. an an ■■. :: ■ :: ηu. the entrance, - jze'.ennzeiciinettn An l \ - shai-

■ ■■. ---. J-iie the married disadvantages »en.ieidei

^: .; V de ^r / aiii of the I .mpl'-int 'channels · ν ·> ·. kiehie.ii ;; <! -. Ie. isitki · ;. i-rr.10gui.-iU.

>>. ·, .W-!. ι'Μ. ·. ·: ή dte -.- r -Vif-cch ·. · '-'- ht vor> k "Ober ..:: ·· .. gone out. Tar de f-einp'.ii' ifg ^ i --k: i eiiiicl ■! e; i ^u -: eichen .ias an S ₁ Js hekanrao ν experience », the '■ ■' or i aif / cndiifei en. messung / \\ i .hen two; : i '.''. LCi η ή.er recipient groups with acoustic

- ■; ■ -: -rpunk; a! - Use U; nd / n., Since mii • e-v. Make procedures one of the degree of reinforcement

· :: ^(ier;. Ntpfind, chkeit of \ he chiedcnen Empiäii-: independent (lei-aiiiizkeii R ι · _ · nt Li nc> best ι ιτ- '

■ let it narrow.

A'i - geiier, d of these considerations v.iri die ge ^; .- '■! [!' Erfindiingsgcmaß object by a Anord :: _ dissolved in each of the sections, the two receive channels ¹ Jen feeding or ^receiver. I: .ipiängergruppen with predetermined acoustic · ,.! point spacing ((D are assigned, as the actual value... , for each of the partial;! ■ (■ an adjustable short timer. whose temporary sequence of the angular arrangement of the sub-area is provided '.ahta -icr is started at the F.intritt in the respective part region and the output of the short timer lias Ereigabesigna! for Richtungsanzeiic at the end of the determined actual value of the time since t ^r entries of Hauptabtasters in the partial region h'rl'ert.

This creates an arrangement for fine bearing, whose Genai-'gkcit of deviations in the Sensitivity and gain is independent. by using the phase or transit time difference measurement possible high measurement accuracy is used. In addition, the same Ge is used in each sub-area Accuracy achieved, regardless of whether adjacent hard sub-areas follow.

The actual value transmitter advantageously consists of a measuring arrangement for the phase delay time i. Let through it high measurement accuracy; n for the direction of incoming signals of various types in one wide frequency range achieve what for use possibility of arrangement is important.

To measure the phase transit time τ, a measuring arrangement which serves as an actual value and consists of a phase meter with a subsequent arithmetic unit can be provided, into which on the one hand the phase measured variable 7 (ω, τ) and on the other hand the angular frequency (i the input signal of the phase meter are entered, and whose output variable only depends on the phase delay r.

The arithmetic unit can make the best of a control loop

-t

'! en! ">. ■ - ·. Eie ^! _{SiUIaISp 1} .nung Jer Kreis ■ rei] iien /. Abieii.le.-i li: ". P,., Scn üciriiiuert is and desv ..: ·. after sieving by : h one, i '^ etprtß ge "-. ¹ -onnene

and the tilt duration lsi. in the control loop s.iui ter.ur (.in! JitTerenzbilüner ^; ür the Sp.innuniien of the 'Phases mevsers and the monostainiep. Muliivi'Tator ^ and a Gleiclispaii'-iüiiü.s'.eistarker. which the difleren / Spanniing amplifies and supplies the niono-.iabiien MuIu -'- ih; a; or as; controlling voltage, wöbe; this voltage is the only n (> ci! ■■. on ^τ dependent AiiS-ganggroi.ie of the arithmetic unit.

The short timer is preferably mono executed stable multivibrator, its fighting time

!. '. ι iunA.iionsireire .: ·, /' j ^ ^ amir narbeiieii the short /.eitgebers and de-, Rechenwerke-- iäUt look aui by errvichcii s ways. that the: uüno.> tabili.-n multivibrators of the arithmetic logic unit and the short-term cebers up to which the tilting period besi, iinenJ; n capacitors are built - where the \: r contains: iis the capacitance of each time-determining capacitor in the multivibrator of the In short, the capacitance of the time-determining capacitor in the processor of the arithmetic unit is equal to the ratio of the water bowl speed to the product of the angular frequency of the main scanner and the ¹ , given that the aci-tic distance from the center of gravity is 1.

An increase in the recognizability of the target by increasing the bondage penalty with little additional effort can be achieved by having the outputs of two receivers or groups of receivers each part area crosswise on the one hand directly, on the other hand Connected to totalizer via running time members are, the two adjacent and around the half an angle of the "1 eilbereiebes against each other versuzte directional lobes form, and that of these Richtkeu'len recorded signals used to control the intensity of the signal for the correct display will. A goal can be assigned to each channel of a right club, which the signal span tion of the associated channel lets through if at the same time from the main scanner an enable signal for the Associated recipient or the associated recipient group of the sub-area and from the Kurzzeitge an output signal is present.

The value set by the actual value transmitter for each sub-range

¹ bare short-time generator can also consist of a coincidence stage and a sawtooth generator, the tilting time of which corresponds to the transit time of the main sensor through a partial area, and whose tilting voltage, which has risen to the control voltage of the actual value transmitter, indicates the point in time for the release signal through the coincidence stage.

In the drawing, the invention is illustrated using the example of a panoramic sonar system. It shows

Fig. La such a panoramic sonar system in • a first,

2a in a modified embodiment.

Fig. Ib, Ic and 2b directional characteristics in the Sonar systems according to Fig. La and 2a, and

Fig. Id shows a voltage diagram for Fig. La. ϊ To monitor an all-round area of 360 ', converters in the form of a cylinder base with z. B. 48 converters U \ to H '_<(t provided. These converters are / u groups of recipients so together

collected. il; il.i about 'lie delay networks of two Receiver channels directional characteristics formed who the, the sub-areas of 7.5 each of the perimeter / belong.

There are two vaccination skairiles in each section. / .. B. the sub-area I shown in Fig. La the F.mp fan groups H ₁ to IT ₁ , and (K ₁₁ to ΙΓ, _Κ . Assigned; through the delay networks N _la and N _lh overlapping directional characteristics R ₁ ,, and R _{ih formed} for the sub-area (Fig. Ib).

The two receiving channels belonging to the first sub-area with the receiver groups IV _{ to W _$ and W ₄₁ to H ^ ₄₈ have an acoustic center of gravity d, so that depending on the direction of incidence of the received waterborne sound waves, there is a phase difference between the outputs of the delay network / V ₁₀ and N _th yields.

A total of 48 pairs of receiving channels are seen before. The reception channels belonging to the second section from 7.5 to 15 ° consist of converters W ₁ to W and VV _u to W ₁ , the 48th section, for example, includes the two reception channels with converters IK ₄₈ to W ₁ and W _Mt to W _in . In the following, only the process for the receiving channels of the first sub-area is described.

To measure the phase difference between the outputs of the delay nct / works / V _1n and N _{lb of} the two receiving channels, a phase meter P _{1 is} provided, which supplies an output voltage proportional to the phase angle.

The two Ausgangssignalc the delay networks N N _la and _lb are further added together in a sum A formers. The sum signal follows the directional characteristic R ₁ according to FIG. La as a function of the angle of incidence of the water-borne sound waves. The output voltages of the phase meters P ₁ to P ₄ and the summers A 1 to A _4S are scanned by synchronously running main scanners S _P and S ,,. The output of the main scanner S _P is given to one of the two inputs of a coincidence stage C, the output of the main scanner S _A art the signal input of a gate G.

A sawtooth generator K, which is synchronized with the main samplers Sp and S _A , supplies a sawtooth voltage to the second input of the Koinzi denzstufe C.

The coincidence stage C delivers an output pulse U _c to the second input of the gate G when the instantaneous voltage U _{K of} the sawtooth generator K (see FIG. Id) and the output voltage U _{P of} the phase meter P match.

The phase meter P ₁ to P ₄₈ are designed so that the voltage swing, which corresponds to a EinfaUswinkelbe rich of ± 3.75 'around the central direction Sy of the sub-area, is equal to the voltage swing at the output of the sawtooth generator K. This measure ensures that the Output pulse U _{1 of} the coincidence stage C opens the gate G at a point in time that is permanently assigned to the angle of incidence of the water sound wave.

So that when the gate G is opened and the signal coming from the main scanner S _A passes through, the visual signal on the cathode ray tube O is lit up true to the angle of incidence, an alternating voltage is generated via a frequency divider D , the frequency of which is the 48th part of the frequency of the sawtooth generator K. amounts to. This alternating voltage is filtered in a filter F and the output signal of a multiplier Λ / is then divided into two ^{alternating voltages shifted by 1} X) against each other, cii · ■ generate a circular deflection with the divided frequency in a known manner. - For this purpose, the phase rotation win ¹ H) "is provided in the phase shifting element //.

Here is the circular track of the circular deflection of the cathode Sti allies is becoming more common in Paiiurumudarsllungcn Way inflated proportionally. To this end

id a ramp generator '/' is provided, the voltage of which is multiplied by the filter output voltage in the M multiplier.

With active sonar systems, the ramp generator 7 ″ is synchronized with the pulse transmission, and its

π output signal rises from the voltage O at the beginning of the solder period to a maximum value at the end of the solder period.

Instead of, as in the illustrated embodiment, the phase difference between the two receiving channels

is ίο len to measure a partial area, may, as ten in the two embodiment of FIG. 2, the Laufzcitdifferen / (phase delay time τ) is measured and used as a measure for the storage of the sound arrival direction from the mean direction Sy of the associated Teilbcrei

2i ches are used. Such a runtime measurement can be achieved by first measuring the phase between the two output voltages of the receiving channels carried out and in one on closing arithmetic unit the phase runzcit r between

jo see both reception channels is determined. The phase delay τ is thus measured in actual value transmitters designed as transit time meters /., To L ₂₄ , wel before, like the phase meters P _x to P _is in FIG

3i sen are.

That in this embodiment, different from that shown in Fig. La, not 48, but only 24 pairs of reception channels are provided, it is based on a further, with the transit time measurement,

■ to unrelated action that is described in more detail below.

The phase delay r measured in the actual value sensors L to L ₂₄ is present at the output of the delay meter as a delay-dependent voltage and is be

π uses to control a short timer Z ₁ to Z ₂₄ . Each short timer is, corresponding to the saw tooth generator K in Fig. La, started when the main scanner S arrives at the boundary of the associated sub-area.

The main scanner S consists of a clock generator 101. which rhythmically advances an L signal in a shift register 102. The shift register 102 has 48 outputs. After the L signal has reached the 48th output, it is returned to the 1st output.

st output returned.

The L signal therefore appears at each output of the shift register only with every 48th cycle of the clock 101.

_{The 24 short-time generators Z 1} to Z ₂₄ are connected to each odd-numbered output of the shift register 102. The appearance of the L signal at one of the mentioned 24 outputs of the shift register causes the connected short timer Z to be triggered via a monostable tipper 103. After its adjustable tipping duration, a needle pulse is obtained from the trailing edge of the output pulse via the pulse shaping stages 104 and 105, which in turn a multivibrator 106 abuts. The tilt duration Al

766 753

this multivibrator 106 is determined by the voltage i. definitely. At the end of the tilting period Λ'Γ thus occurs at the output of the be traciiii'tcM Kurz / .eitgcbers ' /. an output pulse.

The output pulses supplied by the timing generators, are used as control pulses for the associated gate circuits. When a gate circuit is opened by a pulse from the timer, it lets the signals received in the relevant sector Si as video signals for the Hclltastung the cathode ray tube O through. In this case, the clock generator 101 in Fig. 2a has the same effect as the sawtooth generator A 'in Fig. La and the Schicberegi ster 102 that of the frequency divider /) in Fig. La. The frequency divided down in the shift register 102 is, as in the example described first, sifted in a filter and fed to the deflection systems of the cathode ray tube O via a multiplier M after splitting into two components shifted by 90 ° from one another. In this example, a phase rotation element Q for display correction has been inserted between the filter and the multiplier.

The output voltages of the two receiving channels, which are tapped at the output of the delay networks / V, j and N _lh , are added, namely once after one of the two voltages has been delayed by a certain amount in a Laulzeilgüed IO7 or IO8. in such a way that by atkli tion in summers t09 and 110 summation voltage distort which two directional characteristics are assigned, which are against each other by 7.5 ° and against the central direction Sy of the sub-range by 1-3.75 ° b / w. -3.75 ". As a result, with an effort of only 24 sub-areas, i.e. only 24 pairs of receiving channels and the connected 24 delay networks / V, a total of 48 directional lobes, and consequently only 24 actual detectors L and short timers Z are required.

In Fig. 2b, the ^{Richtcharakteri contained for the recipient groups It 7} , bis, JK ₈ and IV ₄₁ to If ₄₈ stiken illustrated. This corresponds to Λ, the directional characteristic offset by + 3.75 " against the central direction at the output of the summator 110 and R, the directional characteristic offset by 3.75 ° against the central direction at the output of the summing device 109. The mutually overlapping directional characteristics R ," and R _xb are effective at the outputs of the delay networks N _la and N _xb and are used for phase delay measurement.

The output voltages of the summers 109 and 110 are processed in evaluation circuits M1, 112 and are applied as processed signals to the ports 113 and 114. Since there are 48 gates, corresponding to the 48 directional characteristics, but only 24 short timers, a selection circuit must be provided for the correct assignment of the control pulses coming from the short timers to the 48 gates, i.e. the 48 directional characteristics. Two AND stages 116 and 117 are used for this purpose, to which the pulses from the short timer are fed simultaneously via parallel inputs and which are connected to successive outputs of the shift register 102 so that they come into operation one after the other. This ensures that the signal of the directional characteristic R _{1 is allowed} to pass through the gate 114 when the actual value transmitter L ₁

a Laufzct is measured, which corresponds to an angle of incidence to the left of the symmetry axis Sv of the receiver groups ΙΓ ,, to H'jk and H ', until It ₁ , and that the T.) r 113 switches the signal of the directional characteristic R , through, wain the running time corresponds to an angle of incidence to the right of the mentioned axis of symmetry .SY.

To the duration of a signal, that is the width of a pixel to control, are behind the AND stages 116, 117 monostable multivibrators 118, 119 provided with adjustable tilting duration. These open the gates for a predetermined period of time and thus determine the size of the pixels.

As has already been explained above, an actual value Gcbcr L consists of a phase meter, which measures the torque of the incoming signals, and an arithmetic unit.

Each actual value transmitter /, contains two two-point elements 120 and 121, which the amplitudes of the two Limit groups of incoming signals. By differentiating the square-wave voltages obtained in this way in differentiating stages 122 and 123 and after filtering off the negative pulses in Bcgrcn / .erstufen 124 and 125 positive needle pulses are obtained at the output of these stages at the times of positive zero passages of the signal voltages.

The NaUeI impulses originating from the signal voltage in the output of the limiter, tufc 124 are delayed by the combination of monostable tipper 26, differential / control stage 27 and limit control stage 128 by a time r. The delay time r _(| must be greater than the maximum transit time difference between echo signals recorded by the directional characteristics R _ia and R _lh assigned to the receiving channels. It expediently corresponds to half a period of the highest signal frequency.

The needle pulses originating from the receiving channel with the Vc.zögerungsnetzwerk / V _1n switch on a bistable multivibrator 129, which is reset by those from N _ih. At the output of the bistable flip-flop 129, square-wave pulses of constant amplitude and a duration corresponding to the difference in transit time of the sound waves at the two subgroup pairs, delayed by the delay time T _0, arise at the rate of the signal frequency. The following low-pass filter 131 sifts from the sequence in front of square-wave pulses from a DC voltage that is ω proportional to the transit time difference and the Kreisfre frequency. In the arithmetic unit the. Circular frequencies. ω eliminated and the phase delay τ determined separately. For this purpose, the needle pulses de limiter stage 125 at the same time a monostable tilting stage 130 in the arithmetic unit at the rate of the Signalfre frequency. The duration of this stage can be controlled _{via a voltage IZ 134.} The tilting period is limited by suitable measures to a minimum of 0.2 T ₀ by a maximum of 0.8 r ₀ . The output voltage of the monostable multivibrator 130 consists of square pulses of the same amplitude and the same clock rate as those of the bistable multivibrator 129. This is proportional to the delay time set at the monostable multivibrator 130 by the voltage U ₁₁₄ and the signal frequency. The DC voltages from the low-pass filters 131 and 132 are switched against one another in a difference generator 133. The differential voltage (V ₁₁₃ is after amplification

kuiig in a DC voltage amplifier 134 of the monostable multivibrator 130 as a controlling voltage £ / "., supplied. The mares 130, 132, 133 and 134 represent a control loop, which, if there is sufficient Re gel gain; causes the tilting duration of the monostable multivibrator 130 is practically the same as the sum of the delay time r _n and the phase transit time ι of the sound waves at the two receiving channels. In parallel with the monostable multivibrator 130 , the monostable multivibrator 106 is set by the same voltage U _xu . This represents the output voltage of the actual value transmitter L or the input voltage of the short-time transmitter Z. The monostable multivibrator 106 is up to the Kipp

10

The permanently determining capacity is constructed in exactly the same way as the monostable multivibrator 130. Therefore, the set tilting durations differ only by a constant factor, irrespective of the control characteristic, namely the ratio of their capacities. This ratio is to be chosen so that it corresponds to the ratio of the Vasserschallgescli Speed to the product of the Krcisfrequcnz of the main scanner and the associated acoustic center of gravity distance d of the relevant receiving channels.

The tilting duration of the monostable multivibrator 106 is thus set proportionally to the said transit time difference, so that the signal on the cathode ray tube O is displayed true to life.

1 sheet of drawings

Claims (1)

i 766 ! \ r-.t> rά: -. ί · ι; .. ■.! ' Ri.::Hi::"!gs ^K e ^ ti'nniMnc -jin; ". ;; lend »." -A ';!,: - ■: ■ c!'.;<■: ■. elien in a cross Wmke 'area, ve-.iei'e: ..! υ- e'.ne ^r variety \ οπ Enipfi ·. p. rak! --.- "siike ¹ !; -...." 1 '-.! - ^ i -ind. aie different :; d <- eii-an .. ·: g; ei./ep.dep ■ '. iiikel ^ uii.iigi-. · '! Subarea ;, η des gesi'.iiKeP. \ ^l . iri-.e-rereicPiCS? L. belong. cine ;; "Hauptiab'uister / u.; - .: r- 'discheri Schne! labt :: üup.g der l" .- Tir !!; ci: iiss: e! ":. i :::.! ier sub-areas, one Em richlup.L! .'iir Abieifiiig of Feiipeilu erten from each oil - -'ue;. the same sub-areaL zugeliorliiei: F.mpfing-kanait.! ¹ -ov. ie a display device ; .i: i / ur .- \ r>'. λ - iijn =.: i! i.': - Free ranges of synchronous Able; · - 'rn ::! or iiicli: uiigs:' i! i: ' eige. especially mute !; tics K ^ 'ii'mdui' ^ 'Tililes of a KiV.rvxler.str.-ilVirr-hre. d: ι :: ι.': g; ■ ·: π ^: ^. ' e: ch π j r. d, v »iedePi j *. ~