DE1588972A1 - Device for receiving remote control signals, especially in ripple control systems with control pulses superimposed on the heavy current - Google Patents

Description

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DIPL-ING. FiNSTERVVALD · DIPL-! NG. GR ^ MKOW

TELEPHONE 225110

P 15 OS 972.2-32 .. ■. 'Munich, the I8.I.7I

; -s 111

ZELLWSGER AG

Apparatus and Kaschinenfo.briken buttons

Gh 8610 Uster / Switzerland

Device for receiving remote control signals, in particular in ripple control systems with control pulses superimposed on the heavy current.

Addendum to patent ... (Pat.Ann. Z 12 322 VIIIb / 21c)

The subject of the main patent is a process for Reception of remote control signals, especially in Runast your systems with the control pulses superimposed, which is characterized by the fact that the control-frequency pulses in an electro-mechanical V / and converter with at least one tuned to the control frequency vibratory structures are initially converted into mechanical vibrations, with at least a vibrating mechanical part only in the presence of a control signal a circuit at least once, closes or lint vomits, whereby through this. Closing or interruption a voltage is made available by which a storage capacitor is charged is, and wherein the energy stored in this way in the storage capacitor is used to operate the receiver will.

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The main patent also relates to a device: to carry out the process, .and is by an electro-nie-, · .->. chanical. Converter with at least one on the tax ,. , Frequency-tuned oscillatable structure and at least one actuated by this oscillating structure contact in the charging path of a storage capacitor marked _K stands. ■

This known arrangement adheres - despite its high vi ,: ^; ; ·; Selectivity and good immunity to interference - nor the ■ - ■■ _ disadvantageous property of> that ■ -....- ■ - ■ possibly present in the storage ■ / capacitor caused by interference pulses. Charges have to be removed via a relatively high-ohmic discharge resistor and are therefore only reduced relatively slowly.

It has therefore been proposed to design the contact device so that - when a control signal is present - The opening and closing times of the contact are made different, i.e. that its opening time is greater than its closing time, and that the circuit is chosen so that a discharge resistor only is effective as such when the contact is closed. These improved arrangement is described in more detail in the Swiss patent (patent application no. 13171/66). It will there demonstrated that by a given ratio / of Oeffnungs- zu Schliessze.it. of the contact and a pre-determined division of the chargeev / iüorötandeö

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two Y / i resistances, one of which during the duration the contact closure is only effective as a discharge resistance, the interference immunity to itself repetitive disturbance impulses can be significantly improved.

With this arrangement, however, the improvement achieved is not yet optimal, since with every deflection of the vibratory structure. - which once per period the control frequency takes place - the mentioned contact is temporary even in the presence of a control signal is closed, whereby part of the charge of the storage capacitor, which is desired in this case, also flows off again. With the known methods and devices it is therefore not possible to use the discharge resistance to improve the receiver behavior Massively reduce interference pulses, i.e. the discharge time very extremely short, because this measure unfortunately also has an unfavorable influence on the over several Periods averaged charging, which through Control impulses is caused. The length of time, polygamous marriage The start of the control signal is necessary until the storage capacitor is charged enough that the receiver responds (i.e. until e.g. a glow tube ignites) idt at the known technology also largely depends on the ratio of opening time to closing time of the contact with others Words of.the amplitude of the vibrating organ or

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ultimately depends on the amplitude of the control signal.

It would be more advantageous, however, to use the mentioned time period of to make the amplitude of the control signal independent as soon as this amplitude has the minimum necessary level has reached. In other words, an ideal receiving device should respond to signals below this critical one Do not respond to levels at all, even if they are of infinitely long duration.

On the other hand, it should be an ideal receiving device Control signals, the amplitude of which is above the critical minimum level, always as precisely as possible according to the predetermined level respond for the same length of time, regardless of the level of the signal. Third, one should Ideal receiver does not respond to signals even of infinitely large amplitudes as long as the uninterrupted Duration of these signals is less than the stated duration.

The present invention realizes this ideal receiver largely and relates to a device which is characterized in that for scanning the mechanical vibrating structure at least two contacts are provided, in such an arrangement that their Opening times are shifted against each other in the presence of a control signal «

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In this way it can be achieved that already for control signals whose amplitude is only slightly above the critical minimum level, either one or the other contact is open, so that the - at Presence of a signal undesirable - closing time practically becomes Hull.

A further increase in the control signal level can then the ratio of opening to closing times and thus also the time required from the start of the control signal is practically no longer influencing until the recipient speaks. ·

In addition, this measure allows the discharge resistance to be considerably increased to be reduced because it now has practically no influence on the - over the duration of a tax- impulse averaged - carry out the desired charging process

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A very small discharge resistance makes the receiver, as desired, very insensitive to interference voltages even of the greatest amplitude and also when such interference tensions repeat themselves often and quickly. Necessary is only that every single, uninterrupted interference voltage surge is shorter than the specified minimum duration of the Control impulses so that there is no false triggering of the receiver the two contacts at least once for a short time be closed together - whereby one by disturbances

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caused partial charging of the storage capacitor in time / can be dismantled again quickly and as completely as possible.

The invention is illustrated below with the aid of exemplary embodiments explained in more detail. It shows:

Fig. 1 is a basic circuit diagram for a

Device for receiving remote control signals,

2 shows a first possible contact arrangement with Spring contacts,

3 shows a further possible contact arrangement with gravity contacts,

4 and 5 show the course of the oscillation amplitude over time the contact pieces under different conditions,

6 and 7 the contact opening and closing times in the sequence of movements according to FIGS. 4 and 5,

8 shows a time-voltage diagram with minimum values.

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In the circuit arrangement vegetable Pig. 1 places 1 and represent the terminals with which the receiving device is connected to the power network. One on the control frequency Matched electrical pilter with inductance 13 and capacitor 14 ″ causes a separation of the audio frequencies Control your voltage U, from the 50 Hz network voltage ILj. The 50 Hz mains voltage reaches the storage capacitor 10 via a charging resistor 3 and a rectifier 4, which would be charged if a low-resistance discharge path was not connected in parallel between points 15, 16 were.

This discharge path is formed from two contacts 8, 9 lying in series, which are closed in the rest position of the oscillating tongue 6. As soon as even one of these contacts is opened, the short circuit is interrupted and the 50 Hz high voltage applied to terminals 1, 2 is capable of charging capacitor 10 via resistor 3 and rectifier 4 in a predetermined period of time which is slightly less than the duration of a control pulse, effectively charging until the glow tube 11 ignites. The contacts 8, 9 are opened - as described in the main patent - by a control signal which is applied to the terminals 1, 2 and which causes the vibrating tongue 5, 6 to vibrate mechanically via the inductance 13, which is designed as an excitation coil.

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According to the invention, the oscillating tongue 6 is now with two in Contacts 8, 9 connected in series, which are arranged in such a way that when the oscillating tongue 6 - provided that the visual swing amplitude is sufficiently large - either one or the other contact is open. In order to realize this, the masses of the mating contacts 27, 28 and their contact pressure on the contact piece 17 are selected so that above a predetermined visual swing amplitude the oscillating tongue 6 or the contact piece 17, i.e. one specified minimum control voltage U,, the self-acceleration of the mentioned masses of the mating contacts 27, 28 against the rest position is so small that these masses the Vibrations of the contact piece 17 no longer constantly can follow.

If the oscillating tongue 6 now begins to oscillate, the mating contacts 27, 28 of the oscillating tongue 6 are able to follow 100 follow up to a certain amplitude A and the low-resistance discharge path between points 15 and 16 initially remains 100 follow . However, if the amplitude A continues to rise, the maximum acceleration of the vibrating tongue 6 occurring in the two vibration end positions also increases and, at a certain amplitude A, reaches the limit acceleration that the mating contacts 27, 28 are still capable of due to their mass and the contact pressure forces. If the amplitude A of the tongue is only very slightly above this limit value, the mating contacts 27 raise,

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stay in the tongue end positions for a short time but still closed in the vicinity of the zero crossing of the vibrating tongue. A noticeable charge of the Storage capacitor 10 does not take place under these conditions, however, because during the short Small charge stored in the storage capacitor 10 is then immediately returned to the closed one Eontakte 8, 9 is dismantled. However, if the amplitude A of the oscillating tongue 6 continues to rise, it is reached it very soon reaches a value at which the contact 8 opens before its partner 9 closes again, so that coverage the opening times occur. This means a complete interruption between points 15 and 16, that long lasts until the amplitude falls again at the end of the signal pulse, which lasts many periods of the signal frequency the amplitude value corresponding to the occurrence of the bridging decreases, whereupon the storage capacitor over the discharge circuit quickly .; is discharged. The charging time / capacitor that comes into effect thus begins practically with the reaching of the vibration tongue amplitude corresponding to the coverage and ends with the Falling below this value.

Fig. 2 now shows a first exemplary embodiment for the Eontäktanordnung 8, 9 with spring contacts, both sides of the Double contact piece attached to the swinging tongue 6 17 springs 24 »25 are clamped in a support 26,

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which carry the mating contacts 27, .28. An insulated attached tension spring 29 pulls the mating contacts 27, 28 against the double contact piece 17. The dimensioning of the tension spring 29 has the essential task of acceleration the masses of the springs 24, 25 with their mating contacts 27, 28 to be dimensioned in such a way that above a predetermined amplitude A of the oscillating tongue '6 the above-explained Coverage of the opening intervals for the contacts 8, 9 comes about.

Pig. 5 shows a further exemplary embodiment for the Contact arrangement in which the pressing force between the double contact piece 17 and mating contacts 27, 28 by the Gravity is exerted. On both sides of the vibrating tongue 6, i.e. above and below it are in bearings 22, 23 two-armed levers 20, 21 rotatably mounted with the Counter contacts 27, 28 are provided. Additional weights G-., Gp cause a predetermined contact pressure between the Contacts 8, 9 · With small oscillation amplitudes of the oscillating tongue 6, the additional weights G-., Gp are capable of permanent Ensure contact is made; with increasing amplitudes, however, the additional weights can move the levers 20, 21 do not accelerate in such a way that the contacts 8, 9 remain permanently closed; so contact opening occurs and thus interruption of the discharge path 15-16.

As soon as the oscillation amplitude of the oscillating tongue 6 decreases again, in the embodiment according to FIG

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Tension spring 29 ″ or in the exemplary embodiment according to Pig. the additional weights G ,, Gp again in a position, the mating contacts 27, 28 to be constantly applied to the double contact piece 17 and to restore the discharge path 15-16. As a result, any possible charge in the storage capacitor 10 is briefly reduced.

If interference voltage pulses occur at terminals 1, 2 with the frequency of the control pulses, then these can under certain circumstances to strike the vibrating tongue 6 and to give it such an amplitude that a short-term Contact opening occurs. But since the interference voltage pulses are only of short duration - especially if they repeat themselves several times - every contact opening is followed by a fading away after a short time the oscillation amplitude of the oscillating tongue 6 and thus the closing of the contacts 8, 9 · A possible partial The storage capacitor 10 is charged by such interference voltage pulses in every interval quickly reduced again between two interference voltage surges, so that practically occurring interference voltages never be able to fully charge the storage capacitor IO. Hur the actual control signals that give the vibrating tongue a predetermined constant amplitude during a certain Grant time intervals uninterruptedly, leave the short-circuit path 15 - 16 open at least as long as bin the charging voltage of the charging capacitor 10

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ΐ588972

- 12 the ignition voltage of the glow tube 11 is reached.

4, 5 ^ 6 and 7, the contact opening and closing times of contacts 8 ,. 9 in function of the route of the double contact piece 17 explained in more detail. The double contact piece 17 describe - stimulated by a control pulse - a forced oscillation 41 with the amplitude A. The possible trajectories described by the mating contact 27 for different dimensions are for clarification purposes the illustration in Fig. 4 and the corresponding possible trajectories of the mating contact 28 shown in FIG.

If one looks first at the diagram in FIG. 4: The mating contact follows from the origin 0 to the point 42 or 43 27 of curve 41. It should be noted that the double contact piece 17 from the drawn first O-passage to the second zero crossing its movement in the direction of the path S is delayed, the value of this delay at the maximum amplitude A reaching a maximum. Of the Counter contact 27 lifts off as soon as the spring 29 or the additional weight G- or Gp is no longer large enough, in order to delay it at least as much as the delay of the double contact piece 17 corresponds.

In the graphic according to FIG. 4, 27 two different restoring forces are assumed, with the Path curve 44 of the mating contact 27 of a large rear

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adjusting force and the trajectory 45 corresponds to a small restoring force. The arrow heights 49 represent the contact spacing for each case. The trajectory curve 44 separates at point 42 from curve 41 and coincides again at point 46 with the path of the double contact piece, ie contact 8 closes again here. For the trajectory 45, the contact is opened at the divergence point 43 and contact is made again at the point 47. The process is repeated for the mating contact 27 at each subsequent oscillation period. The opening time of the contact 8 therefore lasts - depending on the restoring force - from time t, ₂ ^to time tg (FIG. 6) or from time t 1 to t 1 (FIG. 7).

The same applies to the counter-contact oscillating in phase opposition 28 (graphic Fig. 5) · First of all, the mating contact 28 follows the path, depending on the restoring force up to point 32 or 33; there leaves mating contact the contact piece 17 (contact 9 opens) and returns to the contact piece 17 at one of the points 36 or 37 (Contact 9 closes), whereupon the next point in time or 33 again takes off contact. Ask here too the heights of the arrows 39 represent the respective contact spacing.

The resulting coverage of the opening and closing times these trajectories are now summarized in FIGS. 6 and 7, with - for each restoring force according to Path curves 34, 35 and 44 »45 separated - the Üeff

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opening times by solid lines, the closing times are illustrated by interrupting the lines and the top line sequence for contact 8, the line sequence immediately below for contact ' 9 applies. '

In the event of a large restoring force (trajectories 44, 34, Fig. 6), the contact closes up to point tp, then contact opens up to t t ~ ₂ closed, then opens until % ~ r etc. in the time intervals. £ „, / - - t. _? and tg - t " ₂ there is now coverage 4G, 40 'of the closing times; ie in these time intervals the storage capacitor 10 can discharge via the discharge path 15-16.

With a small restoring force under a given amplitude A of the contact piece 17 (or with a larger amplitude A with the same restoring force as above) the trajectory 45 or 35 should be described. Contact 8 remains closed to point 43 and then lifts off to point 47 »closes again to the next point 43 u.s.f. Contact 9 remains closed until point 33 and is open until point 37. The juxtaposition

the closing times in Fig. 7 now shows that both contacts are never closed at the same time, but that time intervals 50 (t ,, * - ^ 4.7) " ¹ ^ S ⁰ '(^ ax - t ~") develop

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are where both contacts are open at the same time. This is the amplitude of the discharge path 15 - 16 continuously interrupted.

As soon as the oscillation amplitude decreases again to a level, that the coverages 50, 50 'of the opening times w each omitted, this means that point 37 (contact 9 closed) moves before point 43 (contact 8 open) that thus during this time interval t ~ „- t. ~ both contacts are closed at the same time, and thus the state according to FIG. 6 is established.

Since the transition from the state

"Time t ~ ₇ is before time t. ~" Or time %. " Is before time t ~~

in the state

"Time t-" is after time t._ " or time t. "is after time t",

is very pronounced, this is a very strict criterion that the receiving device is only for Responds to signals of sufficient amplitude and duration. All interference voltages that either have a smaller oscillation amplitude cause or the duration of which is shorter than is necessary to charge the storage capacitor 10, remain ineffective for switching operations of the receiver.

Since when control pulses occur with sufficient

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Amplitude of the discharge path 15-16 lying parallel to the storage capacitor LO is continuously interrupted - as mentioned at the beginning - a very small discharge resistor 19 can be connected to the discharge circuit, without the over time of a normal Control pulse averaged charging process m would be favorably influenced. The discharge time constant can thus be extremely be kept small, i.e. even with the smallest overlaps of the closing times according to Fi ;;. 6 takes place a complete discharge of the storage energy (! it storage capacitor 10 the opening times according to FIG. 7 to the charging of the storage capacitor 10 uninterruptedly and exclusively determined in accordance with the time constants of the charging resistor 3 and the capacity of the storage capacitor 10; it is therefore no longer dependent on the oscillation amplitude A as soon as it has a "predetermined value" has reached.

This advantageous behavior is shown in FIG. 8. In this diagram, the ordinate is the control voltage U., The pulse duration t as the abscissa. applied. the

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Curve 55 represents the minimum necessary interference or control voltage U. (correct frequency) in function their uninterrupted duration t. which is necessary

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so that the recipient speaks straight away. A vertical one

Border line 51 represents the minimum pulse duration t. daring

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under which a charging of the storage capacitor 10 up to the ignition point of the glow tube 11 even with any high amplitude is impossible. Border line 52 represents the minimum signal voltage U i (or the minimum

min
Oscillation amplitude), below which the storage capacitor 10 is not sufficiently charged - even with a duration t of any length. - he follows. The behavior of the receiving device according to the invention is now qualified by curve 53, which closely follows the mentioned boundary lines 51 »52 - which" should be striven for as ideal behavior - and at the point of intersection it has only an insignificant rounding off. The improvement of the interference immunity against '' About repetitive interference voltage pulses and the reduction in the dependence of the response time on the amplitude of the control pulses in comparison to the corresponding representation of the main patent (see FIG. 2 thereof) are thus salient.

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Claims (1)

Patent claims: M "y device for receiving remote control signals, in particular in ripple control systems with control pulses superimposed on the heavy current according to claim 2 of the patent (Pt. Note Z 12 322 VIIIb / 21ο>, marked thereby i.c h η e t that for scanning the mechanically oscillating structure (5, 6 »7) at least two contacts (8,9) are provided, in such an arrangement that their opening times in the presence of a control signal are shifted against each other in time * 2 · Device according to claim 1, characterized by the fact that the time shift the opening times of the contacts (8, 9) result in an overlap (50) as soon as the oscillation amplitude has reached a predetermined minimum value. 3 · Device according to claim 1 and 2, thereby ch marked that the two contacts (8,9) are connected in series and in a discharge path (15,16) which in turn is connected to the storage capacitor (10) is connected in parallel. 4. Device according to claims 1-3, d a through characterized in that the two contacts (8,9) springs (24,25) attached to them Have mating contact pieces (27 »28), which mating contact pieces by means of a tension spring (29) against a contact piece (17) can be drawn. 109823/0095. - 11 - 5 · Device according to claims 1 - 4, characterized in that the tension spring (29) is dimensioned so that it opens the opening above a specified Sch.vingamplitude of the oscillating tongue (6) the contacts (8,9) allows, on the other hand, if the amplitude is smaller than this, the contacts (8,9) are closed holds. That the two contacts ( '20,21) having 6 _e device according to the are aimed at 1,2 and 3, characterized in that (8,9) with lever attached to them counter-contact pieces (27, 28), which mating contact pieces by means of additional weights (G ., Gg) are pressed against a contact piece (17). 7. Device according to claims 1, 2, 3 and 6, characterized in that the additional weights (G ₁ , Gp) are dimensioned such that they open the contacts (8,9) above a predetermined oscillation amplitude of the oscillating tongue (6) allow, but keep the contacts (8,9) closed at smaller than this predetermined amplitude. 109823/0095