DE2007595A1 - Device for synchronizing a movement of a follower body with that of a guide body, in particular for the automatic synchronization of the rotary movement of radiators and deflection coils in back beam location systems - Google Patents

Description

FRIED ,, SBUPP SOCIETY WITH LIMITED LIABILITY

χη ussen

Device 2yjr Syneh.ronisa.tion of a movement of a Follower body with that of a guide body., In particular for automatic synchronization of the rotary movement of emitter and deflection coil in retro-reflective detection systems

The invention relates to a device for synchronizing sation of a movement of a follower body with that of a guide body with the help of a measuring · - »and delay device ,, especially for Syncnron.i sation of the rotary movement between a deflection coil in a viewer and a rotating one Radiators in radar systems. ·

To move a follower body synchronously with a guide body, is it already known for the transmission of rotational movements, to use so-called electric waves. whose Input a synchronous motor coupled to the guide body is provided. The synchro-

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nization of the rotary movement between the radiator and the deflection coil in radars.

Instead of the generator, a Drenfeidge crossing or a gearbox can be used be coupled to the rotating radiator, to which, instead of the synchronous motor, a synchro receiver runs syncnron.

Used to improve accuracy and ues torque to drive the rotary encoder a gear, uas its Speed compared to that of the heater ueispieisweise ..; it its translation ratio η = Io j 1 increases. The synchro receiver then drives the deflection coil err via a gear. Ratio η = 1: Io an, wooei him now an eighteen-fold increased torque is available.

A disadvantage is that now the natural synchronization

of the synchro system loses its uniqueness. You Deschenken now on a sector of the fine synchronization of η.

Io, a sector of the fine synchronization of> *: In a RotationsDereich of 3 ^ 0 verblei in a transmission with n = 1 ot

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A very inexpensive transmission of the rotation information that is often used, uses a 50 Hz generator coupled to the radiator (guide body). For driving the deflection coil (i'Olgekörper) a commercially available synchronous motor is used.

In order to achieve the required accuracy and sufficient torque here, gear ratios in the order of magnitude of η = 1: Ιοΰ are used, whereby the sector of fine synchronization shrinks (ß = 2.

The accuracy requirements with regard to the synchronization of the deflection coil of a navigation system are even +0.5

The problem is after each disruption of the synchronization between guide and follower body, i.e. radiator and deflection coil, both again roughly pre-synchro-

nize.

Malfunctions in synchronous operation occur after every interruption of operation, but can also be caused by excessive wind pressure on the emitter or similar forces during operation.

In known radar systems, the rough pre-synchro-

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nization down to the realm of natural synchronization a so-called start-stop switch device. device the deflection coil here from the sector of the fine synchronization, then the power supply of your drive, i.e. the torque synchro or synchronous motor, interrupted until synchronization is restored with the next revolution of the heater is made.

In the long run, this start-stop switch device with its mechanical switches has such large angular tolerances, that although they vS for a sector of fine synchronization of 20, for example, still works sufficiently reliably,

but must fail at 2.

For this reason, a semi-automatic start-stop device has already become known in radar systems, in which the operating personnel instructs the power supply of the deflection coil drive ψ via a break contact as soon as there is a synchronizing

sation error recognizes that the so-called advance bit no longer lies on the leading mark on the screen. The deflection coil is then taken along again in the course of the next Emitter rotation automatically.

The object of this invention is to create a device

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which is able to automatically synchronize a deflection coil as a follower body with a rotating radiator as a guide body, preferably in a Kadar system, and Dei Gieicniaufaoweichungen also oei an inexpensive follow-up device with its very narrow sector, without supervision by the staff and with little circuitry effort eier fine synchronization ψ safely and without significant loss of information.

This object is achieved according to the invention in that a measuring device for a running time (t _T ), which corresponds to a synchronization between the deflection body (deflection coil) and the guide body (radiator) plus a reference direction assigned to them, and also a delay device for delaying one of the two bodies, preferably of the Äöienkspule, while a delay time corresponding to a maximum of this running time is preceded.

The device according to the invention monitors the synchronization between guide and follower body with a preferably contact-controlled bieii device.

If the angle of rotation difference is smaller than the constructive one (gear ratio η. , η) sector of the fine synchronization Jt ^ of, for example, 2, the device does not intervene a. ... 6

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However, if this narrow sector of the fine synchronization is exceeded, so this synchronization deviation is in the form of a Running time determined, sat and passed on to a delay device, aie the one of the two bodies over a time corresponding to the measured transit time Delay time, so that the end of the education period - automatically after several delays in the case of large Aoweicnunoen synchronization is restored.

It has proven to be useful for a radar system to use the To delay the Aoienkspule, and after restoration with synchronization to release their / »ntrieo wiccier. The deflection coil has the lesser mechanical ace, and delaying and resuming requires the least amount of energy and circuit technology.

For other areas of application, it can be cheaper to use im For the purposes of this invention oebeispielswcise to delay the guide body, or else to achieve the restoration of synchronization through an acceleration of one of the Deiden bodies.

Using the drawing, an exemplary embodiment of the invention is explained in more detail when used on a radar device.

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It time:

Fi ti. 1 a schematic representation of an already named start-stop switch device,

rip. 2 aas iilockschaltuiid an automatic device for synchronization according to the invention

as an addition to the 'Anrieh shown in Fig. 1 tung, and

3 shows a diagram with the time sequence of within the device of FIG. 2 effective voltages.

In Fig. 1 of the drawing, a guide body 1 rotates in the form of a Radiator 1 of a radar system, driven by a Lotor 2 via a gear 3 · Simultaneously with the radiator 1, however with a ratio of a gear ratio η higher Speed, a rotary field encoder 4> which can also be an alternator.

A synchro receiver 5 runs with this rotary field encoder 4 synchronously to, preferably because of the torque to be transmitted is designed as a so-called Toraue synchro. (is an alternator, 5 must be a synchronous motor in this case be).

5 "

This synchro receiver drives via a gear 6, whose gear

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gear ratio η preferably has the value 1 , a

ⁿ i

Follower 7, which in the case of this radar system has a deflection coil 7 is for their display device. So far it is a question of the usual assemblies of a radar device, which in a known manner by a start-stop device 11, consisting of two switching devices ö and 9 and an interrupter 10 as a delay device, be synchronized.

The switching cams of the two switching devices ö and 9, one of which rotates with the radiator 1 and the other with the AbI enkspule 7, each lead via an associated contact to trigger the interrupter 10 and thus to the standstill of the deflection coil 7> as soon as both switching cams in one fixed reference direction such as the advance direction of a ship, the radar system 1 bearing having an angular difference equal to or greater than the overall ψ by the gear ratios η, η-related sector of the fine synchronization y). The switching device 9 remains closed until the radiator also closes the switching device 9 during its next rotation. The synchronization is thus restored in the reference direction, the interrupter 10 closes, and the deflection coil 7 can now rotate synchronously with the radiator 1.

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In Fig. 2 is the block diagram of the inventive automatic Apparatus for synchronizing the deflection coil 7 already described in FIG. 1 with the radiator 1 is shown. The other assemblies from 2 to 9 also belong to the complete device according to the invention, but here the Switching devices ο and 9 only for generating control pulses used for an electronic measuring device 12, where also only the "ttrderflanke" is used, and the accuracy and fatigue strength can thereby be increased considerably be lü.

From the two switching devices ό and 9 control pulses U and U (according to FIG. 3) are emitted to the measuring device 12, where they are converted into square-wave pulses U and U in a respective pulse shaper 13 and 14.

The Hechteck pulse U reaches a gate step 15 as

to a bistable multivibrator lü. The gate stage 15 is also led to the unstable Iipp stage Io with a iiireu output, _{but only supplies a gate pulse U r} if the narrower I (realecK.impuis U, due to a synchronous disturbance between the radiator 1 and the deflection coil 7, does not match the wider rectangular pulse U coincides.

When a gate pulse IU is generated, the bistable toggle

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-ΙΟ level IG switched »so that on its off '| on;> a licciiteck impulse U disfigured and so long stelienoleiot, ois the uistaüile Tilt stage Ib is tilted back into the rest position by the next right-hand ecimpuise U caused by the radiator 1.

During one by the angular amount of the synchronization deviation The transit time t determined between the radiator 1 and the deflection coil 7 is made up of an “amplifier Io with HC element 19” 20 Integrator 1 / an integration voltage U generated, which rises to its maximum value U 'max. and remains there, provided that the running time t. is greater than an aurcη the

Li

Dimensioning of the ittJ-CJliedes 19,20 specified starting time

t. is. If t _{r is} shorter, U_ only reaches an intermediate Λ max. L 7

value.

The integration _{voltage U 7} already generates a triangular pulse U, which is applied to a gate stage 22, with its smallest initial value. The iJechtecki.nipuis U remains, ois the integration voltage ü has gone back to zero after a flyback time t ^.

However, this gate stage 22 is only opened for a delay pulse U _Q when the trailing edge of the liechteckimpuises U switches through the gate stage 22 after the running time t has ended.

This delay pulse U leads via the interrupter 10

... 11

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to delay the deflection coil 7 »for example by means of Un interruption of the power supply for the Toraue-Synchro resp. Synchronous motor 5

The delay pulse U remains in place for a delay time t _y . This delay time t corresponds to the time t, ^ of the HC-üliedes 19, 20, because with the end of its discharge time the Scnmitt-Trigrjer 21 interrupts its square pulse U and thus the for stage 22 closes.

The ι. The area of the guiding device 12 was deliberately aimed at one smaller range than the maximum possible synchronization deviation limited in order to keep the cost of electronic components within economic limits, so that the restoration the synchronization takes place in stages during two or more successive revolutions in the event of large deviations.

Ib Thus, in the example shown in FIG. 3, there is a synchronization deviation of ^ U ₁ = 250.

The delay process then begins, but in this example it ends when the delay time t _v1 ■ return time t., Corresponding to a rotation angle of the radiator 1 of 100. There remains a remaining synchronization deviation of CVg, «70 °, which only occurs during the next revolution

... 12

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of the radiator 1 is completely compensated for with a delay time t.

if the pike-corner pulses U and U. coincide during the next cycle, no gate pulse Vs is generated and the device does not respond.

Various modifications are within the scope of this invention and / or extensions possible; In particular, the invention can also be applied to such devices in which more than two bodies have to be synchronized with each other.

lö Furthermore, the delay can not only be considered a standstill, but can be realized as locomotion with reduced rotational speed.

Finally, synchronization can also be restored with the help of rotational acceleration of one of the two bodies can be achieved.

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Claims (3)

"Ί Provision for synchronizing a ..possibly a follow-up body rait that of a guide body with the help of a iieii- una delay device, in particular for the synchronization of a rotary movement between ai ^ ADienKspuie in a display unit and a rotating emitter uei radar systems, uauurcji marked, da * $ a keiieiurichtuixg (12) for a uauizeit (t), aie a Gieichlauiaüweioiiuii ^ («-) between: iCiien i'Oi ^ ekürper ( aoi enkspuLe7) and LeifcKurper (stra.ii.er 1) uezdi | iich je eliaer inside assigned ^ rxchtaiig exitüpricht, and also a delay device (24) for delaying one of the two bodies, preferably the (/), wuhrcnu a maximum of this term (c.) corresponding / education ^ time (t ..) is vorixanuen. 2. V ^ oxTLcntung xiach claim 1, characterized in that uui »aie i ·, (l2) is a time expression, aie uei ^, ues a body (l oaer "/) aurcn its iiuzui4üiii ^ tartuar is unu nox ijurcnyang of the other" urp (7 or 1), xiacn / u ^ laul aer running time (t _f ) during an i; ücu JL iaufztit (t.J can be switched to reverse. 3. Device according to Axis claim 1 and 2, characterized in that the Kelieinrichtung (12) an optionally up and down ... 14 109838/0787 - BAD ORIGlNAU 2ÜÜ7h95 downward integrating electronic integrator (l /) is. 4 · Device according to claim 1 or 3> marked uauurch, the delay device (24) with the sieve device (12) is coupled in such a way, ciaii the delay time (t) with uer Return time (t,) is identical. 5 · Device according to claim 1 to 4> characterized in au & of the piston body (/) is provided. Outside of the delay time (t _v ), preferably a standstill b. Device according to Ansorucii 1 to ¹ j, characterized in that the i'.eüeinrictitung (lz) is limited to a lower range that is smaller than the maximum possible Gi eictilauf auwei chuny (; <.). ^. Device according to the preceding claims, characterized in that, within one iieiieinrichtun ^ (12) two pulse shapers (13> 14) controlled by the drawing direction-oriented ociutit device (o, y) ^; · IL a ^ er aie gate stage (15) ni »uiigeschaLteter üistaDiler liippstufe (lü) for the generation of a synchronous control; (v) corresponding square pulse (U) of over the length of the term (t.) Are provided which O I ^ the integrator (17) which determines a return time (t _n ) is connected downstream, including one. Eiseinrichtung (12) a delay device (24) is switched on Lst, in which the conversion of the 109838/0787 BAO ORIGINAL ; <ückLaufzeit (t _? ) takes place in the corresponding delay time (t _v ). 109838/0787