DE1466041A1 - Radar follow-up device - Google Patents

Description

French priority from 17th July 1964 from the French Patent application Mr. 982 024

The invention relates to a radar follow-up device in which frequency-modulated Bauer or pulse signals are sent out and a correspondingly frequency-modulated RF reference signal Formation of a heterodyne wave is received, the frequency of which is one of that by the timing of the reference pulse compared to the correct position formed time interval (to) has independent component. KLt of such badarnaoh follower devices can the Succession of several, mostly movable targets to be carried out at a distance «»

In previously known such bathroom devices, various measures are taken to improve the accuracy of the distance measurements and the sensitivity in the evaluation of the Increase the distance of a detected object. · Such radar · devices measure the distance most often by the modern

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Technique of the pulse pres 8 move η associated frequency modulated Impulse is exploited by means of a refractive medium or by a spectroanalysis device. All these radar equipment measure - otherwise like the usual pulse radars - the distance in video frequency, the measurement with Zwisohenfrequene, the a fairly limited area of action and numerous more «· contains clarity, is used extremely rarely, with the exception of very special cases where the detection of the object is effortless and the maintenance of contact with the Goal is guaranteed at all times. Often, such conditions are created to the disadvantage of the sensitivity of the device, which the Possibility requires the precise removal of a moving object quickly, minimizing any error between the actual and the previously estimated distance to be delivered »In addition, with such radar devices to ensure. a high measurement accuracy, the breaking network or the analysis device must be of very precise design in order to be stable over time to maintain their essential properties »

The invention is based on the object of a SADAR successor device to create that can avoid the above disadvantages and in which above all the detection area and the The accuracy of the distance measurements is increased significantly. This succeeds with the radar near-follower proposed here according to the invention by a discriminator, which from the heterodyne wave a signal preferably with intermediate frequencies

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testifies whose fixed initial phase of the tent spacing (to) linear depends and thus its amplitude and pulse frequency (& o) -von this time interval are independent, furthermore by further DdLekriminatoren, which form an HP signal from the superimposition wave, the amplitude of which depends on the time interval and the pulse frequency of which is independent of this interval, continues to be duroh Circuit elements which convert the two synchronous RF signals and supply a video signal that is dependent on the time interval in terms of gate signals and QrUsse, as well as through the change range the holding organs widening the time interval and finally by circuit elements that determine the timing of the reference signal and the start and duration of operation through the relevant signals of the input amplifier automatically adjusts in order to bring the reference and incoming signals into coincidence

The circuits made in this way lead to a Frequency modulation of the transmitted signals according to a predetermined, preferably linear regularity through and mix when receiving a selected element of the recorded signals with one of the same laws as with Send and deliver frequency-modulated pulse-shaped reference signal a constant frequency beat signal that sue one fixed term and another proportional to the distance between the estimated delay used to excite the reference signal and the actual delay There is a delay, which the emitted electromagnet!

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see wave expends to get to two receivers au. The previously received superimposition wave circulates in two different transmission paths, one of which is subject to a reversal of the BP phase before it is integrated into an ohmic band, tuned tereteater, in order to deliver a similar difference signal to other transmission paths the superimposition β signal is integrated, without being subjected to any changes, in order to emit a so-called Sunmeneignal, which carries the entire energy of the selected elements of the received signals Delay from · Ba the differential signal and the 8u »> menelgnal have a feate frequencies, the torsu way gleloh the Zwleohenfrequens of the receiver, epeleen dleee both signals one of the two transmission paths common to be demodulated against each other and deliver a so-called fell» lerspannuhg bu , the one ungera Enteprioht the puncture, the variable size of which corresponds to a factor of the distance between the two delays; Here the proportionality factor is formed by the product of the quarter of the modulation degree of the friends when sending and the taps, the so-called distance window of the signal. The puncture of the error signal of the variable size can itself be adjusted for small distances, ie it gives a fault voltage proportional to the distance

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the polarity of the existing distance without Breohungsnetse odtr • onetige expensive

Si · changeable oasis of the fault function can b «i dsm here Torgeeohlagenen radar aahr noon can be selected »eo daee the radar device has a high sensitivity, a Extraordinary accuracy and considerable windiness with masses of actual provision, that of the The distance is proportional to the object to be sensed therefrom • Lektroaagnetieohen Ortungaeinriohtung separates ·

The information provided by Dar »ehlerespannung increases eelbet · active elektronieeh · switch, «alone die auf da · BesugesignaX or the correct delay acting on the signal received regulate · · · · Effect can «lon on the same side on the supplying Ortoeeillator as well as at the «lingangeTer-

Set a higher level in the double frequency chain · Vu the error voltage τοη level fluctuations of the low voltages independently, sweokaileelg controls the level of the amplification level of the * teretarker, among other things stabilize the middle level level of the sun signal au · dew. in relation to the two sea properties, namely Aas Differen * ¹ - and sum properties are normalized.

As already indicated, the Yorielohenuakehr leads the Hoohf requenaphaee dee Diffe.renawegee, which at des Orteoeailla-

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tor or to the received signal supplying the dleaen transmission path can take place while the farmer de · Beeugaeignala swei radio impulses “The geooetrisohe Biffereni“ wipe the ”s Both impulses are supplied by the differential signal and the geometric signal Sum leads to a »geometrical sum signal, the compared to the differential signal a phase shift τοη 90 ° beaitst. A selective attitude, walohe the Phaae dee difference turn signal β by 90 °, letataraa alt leads the geometrisohen Sum proper again in phase, daa with small Abetängen only slightly different from the signal of the sum path

Hit of the invention is created for the same radar device Furthermore, a state of affairs aur etatlatleohen Analyae is proposed » the immediate and for a great value the aeitilohen Distance supplies. Your operating company stalls without any fiüokeioht 84] f the analytical expression of the malfunction, in particular if this is periodic, one and can au swaldeutlgen reviews to lead. To avoid this, the proposed way of keeping a larger number of pairs of sutamen- and Bifferenswegen, In which the eohmalbandigen integrating filter tuned to frequencies shifted at regular intervals aind. No matter the value of the side space, but It is anticipated that the overlap signal will vary within the area occupied by all matched filters lies, there is a path of difference, which requires a minimally fun

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mug from nahcsu lull delivers, and «Üst * g« os »trlsoht & which sends a signal aaTlaalen fegols. ¥ · βιι letsteree exceeds a pre-determined Sohwellwert, yerniadet «in elcktro * nieoher 8oh * ltcr dl * Deaod« letlons »<ilialtttng On the respective transmission path pairs old of the um« agehltngen «evaluation signal chain, which is proportional to the error-correct belt delivers . Sie ··· eelbett & tlse etmtletUolie AWenoHM ltoet jegllehe Eweldeutigkelt Teratlden «die eloli dar ·» · result in tena »da ·· the Yehlerftuiktlon beleplelewelee · 1ηα · ΓΟ» 1β 1st «Unab · bangle« the effect of SlojreUepanaaagUL «AKtllone Blgaal · ent, whose rre« aen · rom the AbBtlaafreqaen · «tark abwelent,« ad the transmission paths • peleen neither the DeaodttlaUoneeehaltnng nooh the electronic booklet 8obalter ·

The kit of the pre-arranged Benaltaag is enlarged by the linear operating range of the error function, which is supplied to the aen « Tßv transmission« ways entaaltenie a $ eaalteag. For this purpose, TorvugMrelee is a tuamtsapannong ton of each individual DeaoduUtor adapted "" the value to the ton Has supplied error voltage "o that ·· the electronic switch a · by the · level changes from the Braktleoh linear Abechnitta resulting formed a" bad "panmingen fabler «• paanaag Uefert, who soait Ia AbbJaglgkeit der Seitenllohen Ter- • ohoben« la gross ·· TTntersehsldttags-reraegea «to reach a wide area at least« ad vOlllg eloher from a «hrd« «tlg ·

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| cold let.

Because of all the dleaer properties, what has been proposed here is old Badargerät a progressive flowering with automatic and continuous measurement of the Sntfernong all one especially moving bodies, a tall one

Accuracy and speed in the measurement, a great deal of risk of error, a high degree of frennveraOgea and great sensitivity given alnd _f wellhgenaohaitea in particular then τοη τοη of particular importance when the rer-Jtiältniaaäaaig aohwaohen signal 8ignalaet by a loJnOenohaet no The treatment, f * Aa * signal when the radar is genttaa invention subject, gait at te t medium · Onea einaigen Keaaiapulaea "auaauwerten the aeltliohen Aaetand which ewieohen of the funlorellen ouch pass the tateäehllohen Xntfernung needed lait ia Salt point of Meeeung and that beeteht, who let «Üliraad have been apprehended by the coming Meeeung ·

Further features dea here Torgeaehlagenaa Sadargertta and The advantages achieved by them are also apparent from the naoaatahaadea description of the drawing, which a Kadargar & t represents the invention Kind in a belaplelaweiae chosen execution afora beattglloh Structure and Wlrkungaveiae soheaatlaoh Teranaohaalloht. flg. 1a to le provide a graphic presentation of dia Mode of operation of the hadar device gaaäaa of the invention. 'ig. 14 aelgt

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in the block diagram dl essential component the bathroom appliances, fifv 2 brings 1 »individual the circuit sur statiettsohen Analysis * which shows the lateral displacement and the «error- * tension !! «fe ** · fig. 3a »3b and 3o lateen the formation of the Recognize rejuvenating curve of fault recovery

The description of the operation of a radar close-by-follower device is facilitated by the 8tudiua of the 9igla We Io and the block image of the figure, which looks at a radar that can be a pulse radar, but without This is due to the fact that the transmitter has a very high Prequeft *, which is linearly frequency-modulated and suitable for continuous or impulse signals, is picked up by the receiver with a delay of 0 after being sent to the object in question. The received wave can be expressed by the oil extension Ur, »Sr oos 0 τ , in which the momentary phase 0 ■■ * ■ '· u) o (t * -β)> ^ (t · - ö) ² , ec is the steepness the linear freojien modulation and where the circular frequencies of the outgoing wave in the eye locomotive are t »O. Piping wave is received in a mixer, which is also duroh geepelst the Orteoesillator which a frequensmodulierten with the same steepness "C BeBUgelmpule provides" Vie · 1a eeigt changing the frequens in depen "dependence of the time of the received wave and the Orteoesillatorβ , which starts working at the moment β ♦ to with the circle frequency IUo + Qo su. Mt.

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ImpfHager su get · Sti alt tw Invention Yorgesehlagen · Hader device automatically evaluates the distance to, which exists between the actual and the sown etherification. For the sake of simplification, it is assumed that the distance to merklloh is smaller than the distance caused by the traction pulse. The superimposition signal resulting from the mixture thus has a constant frequency of the circle frequency Xl ^, which is derived from the feet en value J (Zo and the expression - et to seeamaensetet, the ait de "distance to is variable" In Fig. 1b it is assumed that the distance to is positive «Sine solohe Oberlag · - · ring wave of the Sauer Tb, which passes through a filter of the bandwidth Bo matched to the circle frequencies * Λ ο * delivers a signal in the form u (t) - ACs ezpfj (£ bt - «O ^ | Si) | _v in which t ■ (t · - O - to) is set. As long as the filter is eohealbanded, ie the pressure T Bo fs is less than one, one can assume for small distances to that the amplitude A is practically constant if you change Ts · Thus, in the sum path with the superimposed wave of duration Vn · V, the filter supplies the entire signal with the analytical pressure

JJ _T (t) - Af exp Ij (& ot - «tto f / 2) J.

Furthermore, in the differential path, the overlapping wave Tor has the phase reversal, which takes place approximately at te »V / 2 · dl · form TT ₁ (t) * AJl exp Π C- ^ Ot -« Ctof / 4) 7 · Bas equal to the pulse The ratio applied to the superimposition ripple near the reversal leads to BU U ₂ (t) m hf, βχρ Tj (Slot + -Ctor / 4) J. This results in the difference signal% (t) - / U ₁ (t) - U ₂ (t) l sioh

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print out läaet duroh Ujj (t) ■ - JATaiii («, toT / 4)« Φ (tfLot) and the oil signal of the geoetrieohen Suaae

U ₀ (t) - Ju ₁ (t) ♦ U ₈ (t)] - Ataoa («Ctotr / 4) exp (j £ ot). Bio signals represent geoaetrieohen 8uaa »and difference beeitsea aleo among themselves a fhaeeovereohiobung ao 90 ° · fcäaet aaa daa different suitable ao turn 90 °, ao konrt letaterea old daa triaohen Suaaeneignal in Phaee and aiaat dia new rom aai

- Af a («c to r / 4) exp (jßot).

Pig .1β aeigt the vector representation of the signals. The tactor TJt forms the signal U ₁ (t), the tactor H daa 8l «ttal V ₈ (t), the vector DS the signal represents the geoaatrieohen 8naaw and the vector TAT dae iDifferenuitable dead rotation in 90 * · la let at the other point au beaerkaftV Aaaa die Aaplitude daa SlfferaaaaliBala alah einueföreig Ui dependency daa Abatandea to, dia dar gaoaatrleohen Sueaw kooinaafuraig changes «ad dia Aaplitude dar eeeaateunme independent τaοη daa Abetaad ta let · Alelta dieee the same three signals

Dar dia Buaeonoignalo ^tt 0eeaataaaae and Dlfferena "absorbing beaodulator aittelt the product of both Auedrüoke and Ilatort a signal Q ₁ Ii) fL.W -« AS Mo r / 4) ooe («tto t / B).

Bieeea compared to the square mean value dae Snaaeneigwele ^{2 the} «laioA lot« recorded signal forms the error-

algnal B · a fctolft) ooe («Ctot / 2); near the Koinsidena _t who »the Zeltabataad to aahr did little» fillt daa fahloralcaal old

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of the straight line Eo · = (-CC74) to Susannen · The steepness «C * t / t dieeer Straight lines can be made very large around what is proposed here Device to provide an extremely high sensitivity and a more precise assessment of the tent spacing, if that Signal / noise ratio small let. The possibility nöeliöh, Detecting the presence of an echo depends on tone 4 energy dee signals in the Hesszeit and from the noise accompanying it away. The effect of the noise is "that the for * de · Impulse is changed, resulting in an error in the evaluation the arrival tent of the point of the impulse at the point of one maximum slope leads, whereby the accuracy of the distance measurement is significantly limited. To dieeer on the bulging To counteract the harmful effects that can be traced back, according to the invention, the signal is preferably linearly frequency-modulated, and the measurement is carried out at high frequency can preferably be the intermediate frequency. These two solutions have the consequence that the corresponding frequency band, the so-called effective frequency band, is carried by the hat ring Information is increased significantly. The error transmitted to the arrival time of the signal is the smaller »the the frequency deviation of the modulation is larger.

As already briefly explained, »the distance measurement calls a sum signal and a difference signal emerge under high frequency performing circuit. Bas Suamenslgnal transmits the entire energy of the

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placed signals and is used for approximate evaluation of the distance. On the other hand, the difference signal, which is formed by the difference between the two elements of the separated signal and divided by the middle of this window, gives the amplitude and polarity of the lateral error Control error signal which automatically "shifts" the distance window in the direction of a reduction until the time interval is canceled. The cancellation takes place when the useful signal is collapsed with the distance window. This coincidence occurs when the frequency of the overlay signal is constant and equal to the previously set value Qo , to which the filters of the sum and difference path are tuned

That contributes to the formation of the sum and difference signals Intermediate frequency recorded using a single Impulse-based method also leads to an extremely rapid response and insensitivity to changes in the amplitude of the successive pulses. on the other hand the large frequency deviation further improves the resolving power of the Hadarnao follower proposed here

Pig · Td shows schematically in a block diagram the individual circuits, which the sum and difference transmission paths form. The circulating in the ZF chain of the receiver «

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The signal is applied at input B ₁ to the amplifier 1-bit controlled amplification level, followed by an electronic switch 2, which is automatically controlled by the error signal tends to be attributed to the Inpule supplied by the amplifier 1 in coincidence. The element of the separated signal supplied by switch 2 is subjected to treatment and measurement. It should be noted that the effect of the window would be the same if switch 2 were shunted and the conducting state of one or a series of drilling operations Amplifier 1 would control. The supplied signal is applied simultaneously to the circuit branches 10 and 20, in which the sum and difference _{signals necessary for the evaluation of the error signals are formed o} In the circuit branch 20 the signal is applied to the miso stage 21, which also receives the local oscillator $ 0 The voltage supplied receives _o This oscillator, which is frequency-modulated with the same rate of change as the signal sent out, is triggered simultaneously with switch 2 with a constant initial instantaneous frequency. In this way, the component of the signal supplied by the scanner 21, which is obtained from the lower sideband by superimposition, has a constant frequency that is unchangeable over time (circular reagent i2i). This frequency has two expressions. The main expression J2o shows the difference between the frequency of the signal at the input of amplifier 1

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and the frequency of the oscillator 50. The "broad expression -" 6 to the constant frequency as well as the phase of the resulting signal depend τοη the time interval formed by the distance window, which never coincides with the "it de" recorded signal. This component of the signal is transmitted to the filter 25 by the circuit 22 with the elimination of all other products The signal emitted through the filter 23 is applied, on the one hand, to a stabilization circuit and, on the other hand, to the demodulator 3, where the difference signal supplied by the circuit branch 10 also arrives. The stabilization circuit consists of the detector 40 and the comparator connected to it 41 _t the τοη de "reference signal generator is fed and supplies the corrector signal to the gain control 42, which acts on the gain of the amplifier 1 in such a way as to keep the mean level of the signal constant, the τοη de" filter 23 is output and that Suma signal of the measurement forms.

The circuit branch 10 forming the differential signal contains the Miaohatttfe 11, which picks up the signal supplied by the electronic switch Z and the local oscillation which is emitted to the oscillator 50 after the conversion by the circuit 51. The circuit 51 in the Away-

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window changes the VhBMB of the Miaohetufe 11 "led signals suddenly by a phase jump τοη 90 ° ₀ on the main value of the constant frequency of the signal, a narrow band filter is integrated. The difference signal emitted by filter 13 is subjected to a phase rotation of 90 ° brought about by circuit 14 before it is applied to demodulator 3 The demodulator 3 supplies the error signal, which is equal to the scalar product of the mean value of the Suaaen-8ignaIs normalized with respect to the stabilized mean value of the difference- and sum signals is *

The demodulation circuit 3 can consist of a phase detector or some other circuit with the same or similar effect as logarithmic amplifiers, circuits with arithmetic or pseudoarithmetic division.By executing the product of the sum and difference signals, the expression of the error voltage Eo depending on the time interval takes on a sinusoidal shape whose course is shown in Fig. 3a "in a significant portion of both sides of the lullwertes the curve practically coincides with a straight line · in this section is the error voltage simultaneously dea frequency deviation Λΐ of the transmitted modulated signal and the tent distance to between the through the telemetry induced delay and

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proportional to the actual delay ο The actual · Ydelay represents the outward and return side of the sent full in order to get back to the receiving antenna can give, provides a high steepness of the distance measurement and provides the radar follow-up device according to the invention extremely high sensitivity “On the other hand, the proportionality of the sun distance to allows the Abetandefindefind to be opened automatically to correct »to quickly match the recorded signal in Lead to coincidence (to * 0) »

In order to evaluate all these advantages, which are the great steepness the distance measurement result in »it is practically ntitslioh to use the curved parts of the curve of the error voltage as far as possible away from each other »by setting the error voltage up to a value that is still significant for considerable time intervals as well as the acquisition period and any interruption the connection with the targeted Oegenetand prevented. the Measures proposed here »referring to the statistical Support technology, allow this result to be achieved. They also give the possibilities of directly modifying the time interval to independently of the precise law that the error voltage Bo alt dem Time interval to be linked to derive the linearity range of the Extending the error voltage and suppressing a high number of ambiguities, a component that has so far been used in the practical application of distance measurement at medium frequencies

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occurs. The expansion of the linear range of the error voltage is achieved by the multitude of transmission paths of the static analysis maintenance. Purely one and the same incident impulse delivers these transmission paths error voltages that are regularly shifted from one another depending on the lateral distance. By any of these Fehlerspanmingsn is supplied to an additional voltage corresponding values, bringing the straight part of the Fehlerspannungekurve a transmission path to the linear extension of the curve form of the adjacent transmission path su "preceding it ₀ In this manner, has the resultant curve of the error voltage with complete retention of their large steepness a considerable area, which thus facilitates the detection and maintains constant contact with the recorded target! Due to the same situation, numerous ambiguities are suppressed

2 shows the statistical analysis in a block diagram evaluating downstream circuit. To an exact mode of operation for significant time intervals to ensure the statistical analysis hold is fed by the mixers 11 and 21, which filters 12 and 22 are close. You statistical Circuit has a sum multipath branch, a differential multipath branch, an electronic switch 6, a plurality of voltage sources 3On for outputting additional voltages and a Switching logic circuit 46 · The sum multipath branch 1st through a large number of narrow-band filters 23J and 25J »the two

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On the side of the tuning frequencies the filters 23 are regularly shifted in frequency, furthermore detectors 40J and 787 and integrators 43j and 43j following them are formed, at the outputs of which the mean value of the module of the output 49 delivered ^{by the filters and diodes 44j and 777 nlt is supplied} Receives signals. The diodes 44j and 443 allow the maximum value of the voltages aa output of the integrators to be achieved. The voltage available at the connections of the common • output 45 is used to control the gain of the input amplifier 1.

Ser Differeasvielwegsweig consists of a plurality of those of the sum of multi path comparable filters 13j and 137 ^from phase shifters 14j and cause T77 · which the phase shift of signals supplied by the frequensunäeeig shifted filters 90 °, and from demodulators 34 and 77t corresponding in number to the eohmalbandigen filter each branch and in which the signals coming from the filters shifted by the same frequency in the two branches are demodulated. the tension eats the greatest. The knowledge of this transmission path directly determines the time interval to present in each case without running through the error voltage E, the law of change of which cannot be recognized with great accuracy. The electronic one

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Sehalter 6, which is controlled by the switching logic circuit 46 takes place, supplies the error voltage obtained in the transmission path selected by him.

Each demodulator 3J and 5J carries the product of the volumetric and differential voltages of the relevant transmission paths and supplies the error voltage peculiar to each transmission path. (^ y) tT or At 1st, and dl «frequency shift between the two adjacent filters 233 (or 13J) and * C is the duration of the impulse of the« Besugesignal «Pig o 3a shows the course of the distance measurement curve S ₉ which by using the Filters 23 and 13 output voltages is obtained. This curve is drawn as a function of the variable proportional to the time interval to. 71g * 3b schematically represents the network of curves representing the error voltages supplied by the successive demodulators 3} and TJ. Do you find the error voltages 5? and 3j add additional voltages 3Oj and 3OJ, you get "a continuous resulting distance measurement curve with a large effective range o flg. 3b shows the additional voltages 301, 3θΤ, 302 and 5Ü?" which combine calibration with the error voltages to form the resulting curve S ^ su shown in 'lg · 3c. This resulting error voltage is output by the electronic switch 6

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Claims (1)

- 21 - 1466041 patent claims s 1ojRadar follow-up device in which frequency-modulated Bauer "or \ - / pulse signals are transmitted and a correspondingly frequency-modulated HF reference signal is received with the formation of a superimposed wave" whose frequency is a component that is independent of the time interval (to) formed by the timing of the reference pulse relative to the correct position has » characterized by a discriminator (23J) ₁ which generates a signal, preferably with an intermediate frequency, from the superimposition wave» whose fixed initial phase depends linearly on the time interval (to) and thus its amplitude and pulse frequency © .o) are independent of this time interval, furthermore duroh further diecriminators (51 ♦ 11 »13J), which form an HP signal with the superimposed wave» whose amplitude depends on the distance between the cells (to) and whose pulse frequency (ßo) is independent of this distance, furthermore via signal elements (3 »8 , 6), which convert the two synchronous RF signals and one into sign n and Or size of the time interval (to) dependent Yideo signal, as well as circuit elements (30j) expanding the range of change of the tent interval (to) and eohliesslioh by circuit elements (7) »which by the relevant signals (71» 72) the time slot of the Automatically adjust the reference signal as well as the start and duration of operation (2) of the input amplifier (1) in order to bring the reference and incident signals (B ₁ ) into coincidence » ORIGINAL BATHROOM - 22 - 809813/0765 2. Radar device according to claim 1 »characterized in that daea dl · the pulse-shaped superimposition signal of certain Bauer (Vo) into a signal of constant amplitude and frequency, but with the time interval (to) dependent initial phase converting discriminators (23» 23J) from a pulse frequency (2o) matched filter exist whose bandwidth (Bo) is sufficiently narrow that the product (Bo · fe) remains below one. ο Radar device according to claim 1 or 2, characterized in that the an HP signal with an amplitude independent of the sign and size of the time interval (to) delivering ^ isiminators (51, 11, 12, 13, 13j »14) from the phases of both halves of the signaling impulse delivered by the triggered local oscillator (50) according to the sign differentiating circuits (51), a mixer (11) and a superimposed filter (12) that follows it, one on the pulse frequency (Ü2o), a component of the pulse frequency dee from the overlay tion Bfliter emitted Signals matched Bohmalbandigen filter (13) and a selective hold element (14) consist »which can rotate the phase of the signal supplied by the last-mentioned filter by 90 ° _o 4 · Radar device according to one of claims 1 to 3 »characterized in that the circuit elements (3 ₉ 3j, 3J) demodulating the synchronous RF signals consist of synchronous detectors, the video signals of the same polarity as the time interval - 23 - BATH ORIGINAL 809813/0765 stood (to) nit Kittelbar about a "yclic function of whose value-dependent amplitudes ran » 5. Radar device according to one of the preceding claims «thereby marked that the immediately above the the Yideo signals output circuit element (6) the exact display of the Zeitabs t and e (to) supplying circuit (8) consisting of several narrow-band, Frequenavereohappened at regular intervals Filter (133, 23j · HI «257), one of which (133, TJTJ) a in Yorselohen and öröese from des »wischen der Fregen of the superimposition signals and the spacing frequencies of the filter in question, the existing distance depends on the amplitude HP signal and the others (23Jt 257) aplitude constant HF signal kit for one of the Abetina frequencies supply the filter of the same frequency, and furthermore several aynchronous deeodulators (3j «5J) which pick up the RF signals emitted by the filters, several« fed by the related filters (23j «237) each with a rectifier circuit (40j, VPi) and an integrator ( 43J, TJJ) comprising IaAaIe ₉ a logic threshold (46) fed by the latter and an electronic switch (6) controlled by this, several transmission paths fed by the demodulator ^ (5J, 57), which at its output with the error voltage directly the in the transmission path (23j «257) · on which the signal has a maximum, provides lateral displacement (to) obtained, as well as one that of all rectifiers and - 24 809813/0765 Integrating channels emitted signals adding circuit (HU TO "» 45), which formed a mean voltage serving to normalize the error signals supplied by the demodulators 6. Radar device according to claim 5, characterized in that daaa dl the change range of the time interval (to) expanding the holding organs from circuit elements !! (3Oj, 3ÖJ) exist «the Emit additional voltages that each have a »Binseldemodulator (3j, 3J) matched value besitsea, see his * own error signal is added, and eo the electronic signal holder (6) a sound practical by juxtaposing linear sections of the resulting fault voltage formed by one of its fault voltages 7 »Radar device according to one of the preceding claims, characterized marked that the distance window that is on the same side with a constant initial frequency that the Besugslapuls « delivering Orta oscillator (50) triggers and the Xlesent des recorded signal by affecting the input IF amplifier (1) framed, from an automatically τοη der * ehlersspannung controlled electronic switch consists " δ «. Radar device according to one of the preceding claims, characterized characterized in that a stabilization hold (42) is provided to stabilize the mean level of the sum signal 8098 13/0765 - 25 - BATH ORIGINAL is seen coming from a »linear detector (40), one -of a comparator (41) fed to a Besugssign & l and one to it downstream circuit (42), which automatically adjusts the degree of Veretärfcunggrad the preferably in the ZP-Eapfangekette switched input amplifier (1). 9. Radar device according to one of Claims 5 to 8, characterized in that that the two halves of the difference signal after Phase discriminating circuit in the middle of the removal window the phase of the received, then to the Mfferensaleoher (11) applied signal suddenly reverses 10ö radar device according to one of claims 4 to 9t, characterized in that one or more logarithmic amplifiers - Are provided that the Bifferenssignal through that of the sum demodulate and deliver the error signal « 11. Radar device according to one of the preceding claims, characterized characterized in that the transmitted signal according to an Im pre-imposed condition is frequency modulated, which may be a non-linear frequency / selt function in which In the case of the explored orthotometer, except for a constant, it follows the same degree of unevenness BATH ORIGINAL 809813/0765