DE1958748A1 - Procedure for multi-channel remote control of models - Google Patents

Description

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Em £ & £ & in VerfättFöW (öffip f .0 at the transmitter side · eiir 6 <y6ttfi ^ equett * e <r ISfS low-frequency * vibrations up to a few kfife aÄpXitudWiu »ödutie * t: wilrd ¹ , - the after iftifeH * Detoedulation in the receiver oscillating circles corresponding to the frequency of resonance are fed and, after amplification z, BV a relay is activated, since a certain function can be performed

au # solder.

EfIn; deraelt iibKJicbe »Bfei? tia * eaeirMHrfialiiT« m _# . there",

aorlieütie *: ,, iiatr from

tioneleywtre »beloiira £ epwocdtew and! »JBB .. us" Kunlfc Technik "19 ^ 7, pages 05 & - 658 and! "Funkacliau ¹ " 1967 ,. Seeds; 63ΐ - Ä3ft; «ÜogPÜeiMl becBriieben !. Be * SyeHee: becomes ¹ ü »ditx-clir« fn ¹

defined time intervals continuously a Group of tax elgnalwii. ilttex-trraeen, which have one thing: iihigh-frequency ΤταεβΓ al! » impressed aind-.

The each * control channel de «fSap ^ üiK ^ rw zcr Intermediate communication is duxrcli the time interval between and the beginning of this one ! ■ pulses up to »scope; de * necbaten üipulaea .. Dec AuascIsXtte d »a; Steoerorgana ie;

The Kuslenkans corresponds to the control button in the transmitter. De »tfiedex-aolunirstakt of the whole Xnforaationayrapp · beat: I-I; a basic generator with a Vietterliolzeii; for example JO n »a _r which essentially gTöOmr iet as the duarcli the control coils of 1-2 as Daaex and the outer tent of about Ο, Λ ■» ■ claimed »time.

Not in d «a of the IJaroraatioxtan turned over beatiftpruchten part of the 1Tled «Tsolzeit will be the

1ÖS822 / ÖSST '.

g 1512

High-frequency carriers are modulated with a so-called Hücltstellsignai.

These known remote control systems work afterwards the amplitude modulation process. While the earlier systems single MF-TSne for transmission who use the control signals, in modern proportional systems the transmission signal is almost exclusively switched on and off in rhythm with the coded control commands. There are also Systems known to change the frequency of the Use MF tones to transmit proportionally coded commands. This SyetcMen depends, however the big handicap is that they require a relatively large bandwidth when multiple functions be transmitted simultaneously or time-division multiplex should. The system of highly frequented inputs and Blanking, on the other hand, is narrower, but is much more susceptible to interference ASf disorders.

DU · The task of the present Crfindaag exists in to -wezmelden the described power.

Reg. 1512

Issued by a method for menrkanaligeη Remote control of models in which the control information in the transmitter is sequential in time a fixed repetition rate modulated on a carrier and in receivers after their distribution on the individual control channels a function proportional to the length of each of this information control, the invention is to be seen in the fact that the carrier broadcast by the transmitter alternately between two adjacent frequencies is keyed, the dwell time at the keyed frequency measures the deflection of the respective tax body addressed in the recipient.

With a suitable choice of the modulation index, the bandwidth requirement when operating the system in the shortwave range not or only insignificantly larger than in the known systems, it can be effortlessly in the channel spacing of + ^ 10 kHz customary in this area. With careful Limitation in the intermediate frequency amplifier of the receiver ensures this method is very effective AM suppression.

The transmission frequency can be kept constant in the usual way by means of an oscillating quartzea, since

Reg. 1512

Circuits for quartz oscillators are known, which allow a variation of the oscillator frequency up to about 2 $ ("Electronic Design ¹¹ 6, March 15, 1967, p. 244-2l * 7).

In contrast to the known method, control commands by rhythmic switching on and off The same goal is achieved here to transmit the transmitter in the cycle of these control commands Keying achieved from one frequency to the other.

The power requirement for keying the frequencies is minimal. On the sender side, there is therefore no Power modulator, while in the receiver the frequent problematic control circuits can be dispensed with.

The control circuits are therefore particularly critical in the remote control of models because they are safer Operation of the receiver both in the immediate vicinity of the transmitter as well as at the range limit should be guaranteed.

The proposed method using frequency modulation is still on the UHF remote control band

1098 ?? / Π957

Reg. 1512

more advantageous than in the KV band, because the modulation index is higher here due to the larger channel spacing may be chosen. For the same reason, they also decrease when using plug-in quartz systems Channel selection the requirements for the accuracy of the quartz and its cost. The biggest advantage the invention brings in the UHF band, but is also here in the good suppression of AM interference too see.

If one considers the modulation index m as the quotient Defined from the maximum stroke H and the maximum modulation frequency F, i.e. ra = ', are guidelines for the modulation index

in the SW band: m = 3

in the UHF band: m a 3 to be mentioned.

10982 7/0957 * "- 7 -

Claims (1)

Beg. 1512 - 7 claim Procedure for the multi-channel remote control of Models in which the control information in the transmitter is sequential in one fixed repetition rate modulated onto a carrier and in the receiver, according to its distribution to the individual control channels, one function in each case control the model proportionally to the length of each of these pieces of information, characterized in that the carrier emitted by the transmitter alternates between two adjacent Frequencies keyed iwrd, whereby the dwell time at the keyed frequency measures the deflection of the respective tax body addressed in the recipient. 10982? / 0957