DE1099046B - Remote control relay that works with 2 transmission frequencies, especially for overlay remote control systems - Google Patents

Description

Remote control relay working with 2 transmission frequencies, especially for Overlay remote control systems Overlay remote control systems for power networks mostly work with sound frequencies, i.e. with a frequency range in which in contrast to the high frequency the resonance curve of an oscillation circuit with economic Dimensions of its parts are relatively flat. It is therefore often difficult sometimes even impossible, as a receiving relay through a capacitor on the To use switching magnets that have been matched to the superimposition frequency, as there is a risk of that these relays because of their low selectivity due to neighboring frequencies, higher Mains harmonics, glitches, etc. are actuated. It is much sharper in this frequency range according to known laws the resonance curve of a mechanical oscillation system pronounced, but here the other difficulty arises again, the mechanical one Convert the oscillating movement into a definite switching movement, especially if this switching movement should be precisely defined in terms of distance.

But there is also another difficulty with such systems on. The power grids are subdivided, and the individual parts are through transformers coupled with each other and also with neighboring networks. These coupling points must depending on the conditions for the superimposed currents permeable or non-permeable be. If these requirements are not met in individual cases, then they must Areas can be bridged by control circuits or blocked by blocking circuits. Used man, now a variety of control frequencies that are further apart, then these routing and blocking circuits would have to be set to the respective superimposition frequency before each transmission be remotely tuned. This is cumbersome and expensive. Regarding the spread The superposition energy is therefore: cheaper, only with one or with a few few control frequencies to work so that you can use tightly tuned circles or can be limited to the frequency range for which the relevant coupling point is permeable in networks. But should one now do one with one or a few frequencies Carry out a large number of different control files, then the receiving relays will at least drop for the operation of, mass equipment, such as hot water storage tanks, tariff devices, etc., way too expensive. So one has z. B. used for such purposes receiving relays, that have a selector driven by a drive that is triggered by a start pulse was set in motion. The actual remote control act was carried out, for example one at a certain time interval that varies depending on the type of remote control act sent completion impulse executed.

The invention is based on this, despite the restriction to a few control frequencies get by with cheap receiving relays without having to forego a large number of tax files. The receiving relays should work so selectively that they are caused by network harmonics and other disorders are not affected. The invention makes of in itself or in connection with other parts known means use and consists in one novel purposeful combination of such means.

In a known remote control device that uses mechanical oscillating systems and works with two differently tuned transmission frequencies, is to be gradual Movement of a switching disc, an indexing mechanism is provided, which has two mechanical, Oscillating systems in the form of spring tongues, each tuned to one of the two transmission frequencies having. The two oscillating systems each act on one of the two with the switching disk ratchet or steering wheels seated on the same shaft. By sending the The switching disk becomes one frequency by means of one oscillation system up to one Moved forward end position in which it triggers the switching process to be carried out, whereupon by sending the other frequency the switching disk by means of the second oscillation system is returned to its initial position. With each of the two frequencies must so a certain minimum number of pulses are sent, so that each associated ratchet wheel moves the indexing disc by the specified distance. The two ratchet wheels are only halfway around serrated; one may therefore, in view of the fact that occasionally one or a few impulses are too weak fail and do not move the switching disc any further, even more than send the required minimum number of pulses. A shortcoming of this known device is, however, that it can also respond to glitches.

Also with another well-known. Remote control device becomes a Switching disk moved step by step by means of a ratchet wheel, but are electrical oscillating systems are used, and also according to the pulse number method is being worked on. By sending a very specific number of pulses at one frequency An electrical oscillating system tuned to this frequency moves the ratchet wheel up to a position in which there is a switchover of the electrical oscillating system on the second transmission frequency, and only through what is to be done on it Sending a very specific number of pulses of the second frequency will be the indexing disc moves on. You can use either of these two movements or a switching process with a delay time only after the second movement to be triggered. Since this device works according to the pulse number method, so it has the disadvantage over the aforementioned known device that for each movement of the switching disk by a predetermined distance, as already mentioned, an exact number of pulses is required.

The invention is based on this, despite the restriction to a few control frequencies with cheap mechanical receiving relays and 'without sacrificing a large number of Tax records get along. The receiving relays should work so selectively that they are not influenced by network harmonics and other disturbances. The invention makes use of means known per se or in connection with other parts and consists in a novel, purposeful combination of such means.

The invention also relates to one with two transmission frequencies working remote control relay, especially for use in overlay remote control systems, with a step-by-step moving a switching disk in the manner of a selector Step-by-step mechanism that controls the switching disk by means of a mechanical oscillating system moved forward to an end position and by means of another, the mechanical oscillation system tuned to the other frequency End- in. The initial position moved- According to the invention, this remote control relay is thereby characterized in that the stepping mechanism has three mechanical oscillating systems, two of which are tuned to the same frequency and that two are different coordinated oscillation systems the switching disc only alternately up to the end position can move forward, while the third, the indexing disc from the end back into The oscillating system moving the initial position with an automatic deceleration device is provided, which is actuated when the switching disk end position is reached. Through this the following advantages are achieved: The fact that two differently coordinated drives can only alternately advance the cam or switching disc, you can for these drives use mechanical vibration systems which, as stated above, are highly selective and at the same time force specified switching paths once and for all, which result in a clear stepping of the switching disc. By being by these drives the voter can only be brought into one end position and the Transfer of the switching disk from the end position to the starting position causes a delayed activation of a third drive, the defect becomes at the same time of stepped switching disks, namely in the absence of control impulses or getting into disorder when glitches occur, prevent, because you can be left behind in excess by alternately sending incremental pulses Switch the switching disks through to the limit switch without the switching disks hurrying ahead Move on from the end position to the starting position and through the excess Incremental pulses are advanced. Due to the above combination will be practically all of the demands made on a modern overlay remote control system be fulfilled.

The invention is illustrated by way of example in which the simplicity for the sake of a switching disk only actuates one switch, explained in more detail: To the high-voltage network N, an electromagnet 2 is connected via a capacitor 1, the two tongues 3, 4 can vibrate. The tongues 3, 4 are, as is the case with weakly damped mechanical vibration systems is easily possible, quite sharp two closely spaced tone frequencies matched. On the range of these frequencies is also the circuit 1, 2 tuned, which, as mentioned, a relatively has a flat resonance curve. The tongues 3, 4 also form pawls that, against each other offset, can engage in a toothing of a wheel 6. The wheel 6 has an interrupted one Gearing; the toothed areas and the toothed gaps correspond to the distance of the pawl tongues 3, 4. In addition, the wheel has a larger tooth gap 7. It sits together with wheels 8 to 10 on a joint, indicated by 11 Wave.

The wheel 8 has a corresponding tooth gap 7 of the wheel 6 Area of a toothing 12 into which a tongue 13 with a pawl 14 can engage. The tongue 13 is tuned to the same frequency as the tongue 4 and will also still excited by the magnet 2. For this purpose z. B. the three tongues 3, 4, 13 arranged close to each other in front of the pole of the magnet.

In the oscillation path of the tongue 13 engages a bimetallic spring 15, which can be heated by a winding 16. Prevented in the cold state shown it engages the pawl 14 in the toothing 12. When heated, it bends moves in the direction of the arrow and thereby releases the tongue 13.

The disk 9 can with a cam 17 a switch 18 for the heating coil 16 close. This cam meets this switch in the end position of the arrangement. The arrangement is drawn in the initial position. The adjustable on the shaft Disk W arranged in 11 has a cam 19 which can close a switch 20. Depending on the setting of this cam 19, the switch 20 is in the one or other position of the shaft 11 actuated. So there are receiving relays for different Remote control files always have differently set cams 19.

The switch 20 sets a heating coil 21 of a bin-metal spring 22 to the network, which carries one contact 23 of a switch 24, the other contact is denoted by 25. The device to be operated remotely is directly connected to the switch 24 or connected indirectly via a contactor. The tongue 3 is on the frequency f, the tongues. 4 and. 13 are tuned to the frequency F.

The arrangement works as follows: Should the switch 24 be closed then the frequency f is first sent temporarily, so that the tongue 3 responds and the wheel 6 advances by one tooth range. This arrives the tongue 4, which was previously engaged in a tooth gap, in a toothed area, while the tongue 3 has reached the end of such a range. Even if the Frequency f is sent much longer than for some reason called stepping of the wheel 6 is necessary, the wheel 6 can only move one Toothing area can be advanced. In order to continue switching must now the frequency F are sent, causing the tongue 4 to vibrate. brings and thereby the wheel. 6 advances by a further tooth range. Now has the tongue 4 the end of such an area, the tongue 3, however, again the beginning of one reached such an area. For the purpose of further switching of the wheel 6 must now again the frequency f are sent and so on. It's always best to become something Send longer than is required for a switching step of the wheel 6 to with Security with all receiving relays, even those that are slower or less Receive remote control energy, etc. to achieve the completion of a switching step. In this way, the wheel 6 is now switched on until the cam 19 the switch 20 closes. Now the broadcast is stopped or paused for so long until the bimetallic spring is under the action of the heating coil 21, which is now switched on 22 has bent to the contact closure of the switch 24. This becomes the remote control act completed. The frequencies f and F are then sent alternately until the arrangement has reached the end position, and there are also other programs of frequencies f and F carried out in excess to remove any switching disks that were left behind 10 of the system to bring it into the end position with certainty. Has in the end position the cam 17 switched on the heating coil 16 via the switch 18. The bimetal spring 15 begins to bend in the direction of the arrow; but she works with such indolence that even when the frequencies f and F are transmitted in excess, they still do not have the tongue 13 releases. For example, it may take about 20 seconds to release.

In these 20 seconds you have enough time to broadcast excess Incremental pulses. Only after this waiting time has elapsed, the bimetal spring 15 is the Tongue 13 free, which is now in the end position of the switching disc. Beginning of the gearing 12 has reached. Well, it will be long enough! Frequency F sent so now apart from the tongue 4, the released tongue 13 can also swing. The vibrations of the tongue 4 are ineffective because they work in the larger tooth gap 7. In contrast, the tongue 13 advances the disk 8 by its toothing area and thereby brings the arrangement from the end position to the starting position, namely only up to this position, because later she will no longer find any teeth. Simultaneously If the cam 17 leaves the switch 18, the heating coil 16 is switched off, the Bimetal spring 15 cools down and returns to the end position shown. Now you can do it again with a new one. Broadcast can be started.

When the switch 24 is operated remotely, the other relay is the differently set cams 19 to the relevant, the switch 20 corresponding Hiked past counters and temporarily closed them. A remote control act but was not carried out because the bimetallic spring 22 of the relevant Relay did not have enough time to close corresponding contacts 23 and 25. Or in other words: for the execution of a remote control act it is necessary that with the clock-wise transmission of the incremental pulses at least as long in the corresponding dial position is stopped that the thermally delayed switch 24 have time to close.

It will usually not be practical to use the tongues 3, 4 and 13 directly to use to switch wheels, because otherwise they are too damped and thus becoming too little selective, rather one gets in the way of such a tongue make a button strive, which in turn first advances one wheel. The button is arranged at such a distance from the rest position of the tongue that it is sufficient Has space to rock up undamped.

In the exemplary embodiment, the bimetal tongues work with working current, instead, however, they can also work with quiescent current. Instead of bimetal tongues can other cheap delay organs, z. B. NTC thermistor, working like an hourglass Mercury tubes or the like. Can be used.

Claims (2)

PATENT CLAIMS: 1. Remote control relay working with two transmission frequencies, in particular for superimposed remote control systems, with a step-by-step switching mechanism that moves a switching disk in the manner of a selector Another frequency tuned mechanical oscillating system is moved back from the end to the starting position, characterized in that the stepping mechanism has three mechanical oscillating systems (3, 4, 13), two of which (4, 13) are tuned to the same frequency, and that two differently tuned oscillating systems (3, 4) can only alternately move the switching disk (10) forward to the end position, while the third oscillating system (13) which moves the switching disk (10) from the end back to the starting position with an automatic delay device ( 15) is provided that when reaching the switch yoke end position is actuated (by 17, 18) . 2. Relay according to claim 1, characterized in that that the third oscillating system (13) one by a bimetal spring (15) in the cold Has locked ratchet arm (14) and that a heating circuit (16) of this bimetallic spring (15) is on a switch (18) which closes in the switching disk end position. Documents considered: German Patent No. 730 658.