DE905469C - Device for starting up a drive by remote control - Google Patents

Description

Device for starting up a drive by remote control The invention relates to a device for starting up a drive by remote control by means of an encrypted light beam, in particular for Opening of a garage door by the headlight controlled according to the encryption on a motor vehicle.

It has been proposed to remotely control garage doors to open by means of radio-electric waves from a motor vehicle, to which Purpose connected to the opening device for the door a receiving device that responds only to certain electrical signals. Such However, setup is complicated and expensive and uses alongside the receiving device special radio-electric transmitter in the vehicle ahead.

It is also known to use electromagnetic means for doors or gates to open by installing an electromagnet in the floor of the vehicle, which is triggered when the vehicle is driven over be put into operation by the vehicle under the action of certain impulses and thereby initiates the opening of the door. Practically, such a facility has neither because of the structural inconvenience and costs involved can enforce.

Optically remote-controlled devices are also known which especially for counting bodies moving through the light beam, e.g. B. Vehicles, are intended and made up of two light-sensitive, connected in series Consist of cells arranged along the path of moving bodies and are brought into effect one after the other. The first of these two institutions only carries out a preparatory activity for the purpose of commissioning the second facility to enable and thereby in opposite Exclude moving bodies from the counting process. Special encryption devices are not provided in this case.

Furthermore, arrangements for optical remote control are known, at which signal luminous fluxes of a certain carrier frequency on the transmission side one or more modulation frequencies can be pressed and on the receiver side those caused by the signal luminous flux in a light-sensitive part Currents are fed to a selection circuit tuned to the carrier frequency.

It is also already known to open doors or gates, e.g. B. of garages, with the help of a thrown onto a photocell from the headlight of a motor vehicle to open the emitted light beam, whereby to secure and prevent unauthorized persons Actuation of the system, the triggering light is modulated and the receiving system is tuned to the relevant modulation frequency by means of sieving and the modulation oscillation can optionally be subdivided in the manner of a Morse code. .

The invention consists in that the drive, for. B. for a garage door, one through a photosensitive cell, e.g. B. selenium cell controlled Switching device is connected upstream, which only in a certain way encrypted, the light-sensitive cell hitting light signals by opening or closing one electrical circuit responds and thereby, especially after a certain Duration of action that activates the gearbox for the drive.

The encryption of the controlling light can through evenly periodic or uneven interruption of a light beam, by selection certain wavelengths or the like. For encryption and decryption can expedient clockworks with the same control effect, z. B. spring mechanisms used one of which is built into the transmitter and another in the receiver and which are in operation at the same time by a light beam emitted by the light transmitter be set so that the clockwork of the receiver is synchronized with that of the transmitter expires and thereby the drive, z. B. a door, puts into operation.

Further details and advantages of the invention are as follows Description of several circuit diagrams to be found, namely Fig. I and 2 show the Remote control of a drive system depending on an alternately interrupted and re-flashing light beam, FIG. 2 showing a variant of FIG Use of periodically intermittent light represents, Fig.3 a remote control according to a principle similar to that of the circuit diagram according to FIG. i or 2 with intermittent Light and fig. Q. remote control by light beams with encryption Selection of certain wavelengths.

Io is a headlight, z. B. the Headlight or searchlight of a motor vehicle, which from a suitable Power source ii on the vehicle z. B. receives power via a switch ii '. Of the Headlights are controlled in a suitable manner so that they alternate light emits and is darkened again. In the schematic sketch this is indicated by a Drum 12 indicated, which rotates around its axis and for encryption of the Light beam is provided with recesses 13 ', 13 ", 13"' etc., the drum by a suitable clockwork 1q., in the drawing schematically by the spring 14 indicated, are offset in rotation in the direction of arrow p with a certain speed can.

Another light source is indicated at 15, which is outside of the Vehicle is fixed and emits a constant light in the rest.

The recipient who z. B. is used to open a garage door, there is essentially from the selenium cell 16, an amplifier 17, a decryption device 18, which is also shown in the drawing as a drum and with the openings the drum i2 corresponding recesses 19 ', i9 "and 1g"' is provided, further the time switch 2o and the light-sensitive cell (z. B. selenium cell) 21 one Light barrier which is connected upstream of the selenium cell 16. The light source 15, which z. Belly. can emit infrared light is usually directed so that the light beam emanating from it hits the selenium cell 21. A relay 23 in the circuit 22 of the light barrier operates a switch 24, which is in the circuit 25 of the selenium cell 16 is arranged such that the switch 24 is open as long as the selenium cell 21 receives light and thus the circuit 22 is energized, but closed is as soon as the circuit 22 is without power.

The current produced in the circuit 25 is amplified by the amplifier 17 in such a way that an amplified current is produced in the same direction as it in the circuit 26, 27, 28, 29 when the switch 30 is closed. The switch 30 is switched by a lever arm 31 which is controlled by the drum 18 by means of a wedge surface 32 such that the switch 30 is closed when the wedge surface 32 is above one of the openings 19 'to 19 "', on the other hand is opened when it runs down on one of the drum surfaces located between the openings.

A corresponding, but inversely acting, from a wedge surface 33 of the switch lever 3 [actuated] switch 35 is located in one of an external power source 36 supplied circuit 37, 38, 28, 29, so that this circuit is energized is set when the wedge surface 33 on the surfaces of the drum 18 between the Openings 19 'to 19 "' runs out and thus the switch 35 closes.

The drum 18. is coupled to a clockwork 39, which is the clockwork 14 is precisely matched and, once released, the drum 18 at the same speed, z. B. in the direction r, offset in rotation with which the drum 12 is driven by the clockwork will.

The timer 2o, provided that there is uninterrupted power through the lines 28, 29 flows, after a certain time interval d & 'switch -fd and thus a circuit 41 is closed, which is to be actuated Transmission, e.g. B. to open a garage door, takes effect.

The operation of the device described is as follows: In order to generate electricity in the circuit 25 of the receiver cell 16, the vehicle first drives so far towards the door that the light beam of the light barrier 15, 21 is interrupted Switch 24 is closed. The drums 12 and 18 or the corresponding encryption or decryption devices are initially located, e.g. B. under the action of resilient devices, in mutually corresponding rest position, z. B. as shown in the drawing. However, it is expedient to darken the light source io before the start of the decryption process and to release the darkening only when the drum 12 begins to rotate. This can e.g. B. done in a simple and expedient manner in that the drum 12 is adjusted so far against the direction of arrow P that the light is covered by the lower edge of the opening 13 '. If the drum 12 is then released to rotate, then at that moment in which the light passing through the opening 13 'falls on the cell 16, a shock surge is generated in the line 25, which on the one hand triggers the spring mechanism 39 in a manner not shown and on the other hand, current is generated in the circuits 26, 27, 28, 29 via the amplifier 17; the latter, however, only when the switch 30 is closed, ie the inclined surface 32 of the switching lever 31 is above the opening ig ', and only as long as the selenium cell 16 receives light. The time switch 2o is thus also supplied with electricity, so that it begins to run.

In order to ensure that the drums run synchronously, a device can be provided on the vehicle, which simultaneously with the interruption the light barrier 15, 21 at the same time also releases the drum 12 for rotation. to for this purpose a light-sensitive cell can be arranged on the vehicle, which receives light at the moment the light barrier is interrupted by 15 and thereby, e.g. B. by means of a relay, the spring mechanism 14 simultaneously with the release of the Drum 18 releases.

If the drum i: has rotated so far that the headlight is darkened by the upper edge of the opening 13 ', the selenium cell 16 no longer receives any light either, and the current in the circuit 25 is interrupted. As a result, no more current can be supplied from the amplifier 17 via the switch 30 to the time switch 2o. The time switch ao is now set up in such a way that it is switched back to the original position at the moment the power is cut off and thus prevents the switch 40 from closing in this case.

So that the switch 40 can now close, it must continue to receive power even after the power to the receiver cell has been interrupted. This is done by the fact that at this moment the decryption device 18 switches to the circuit of the foreign source 36-, in that the inclined surfaces 32 and 33: the switching lever 31 and 34 run onto the upper edge of the opening ig '! whereby the switch 30 is opened and the switch 3 $ is closed. As a result, the circuit 37, 38, 28, 29 is closed, so that the timer 20 remains under power and can continue to run.

Are the drums 12 and 18 with respect to the ones provided in them Control recesses as well as with regard to their starting position and their speeds precisely coordinated, so there is no interruption of the current at the time switch 2o instead. The switch 40 for the circuit 41 is consequently after the close a predetermined time and thus the gear to be operated, z. B. for the Garage door, put into operation.

Any deviation from the synchronous running of the encryption device 12 and the decryption device 18 has the consequence that the current at the timer either already at the receiver cell 16 or at the switch 3o or at the switch 35 is interrupted.

The control of the light beam can also be done by evenly periodic interruption, such as. B. is indicated in FIG. Here, the drum 12 or 18 is provided with slot-shaped openings 42 of the same size and arranged at the same distance from one another. By using different slot widths a or different spaces b between the slots, encryption of the device that is secure against unauthorized use can also be achieved in this case.

The simultaneous commissioning of the encryption and decryption facility, z. B. the drums 12 and 18, can also be achieved that instead of or in addition to the light barrier 15, 21 with a fixed light source 15, another one Light source is provided on the vehicle. This is intended to light up to throw the selenium cell 21 or onto an additional cell, which another Switch in circuit 25 operated by means of a relay. The actuation takes place but in this case in such a way that the switch is activated when the light hits the cell is closed, but remains open in the absence of light. The light source is located preferably in a circuit which, when supplied with electricity, the spring mechanism 14 triggers and thus starts up. In this case, it is initially useful the headlight io directed at cell 16 and only then the one directed at 21 Light source 15 or the additional light source switched on. As soon as the latter happens, put both drums 12 and 18 into operation at the same time, so that with precise coordination, the synchronous running of both clockworks or drums is guaranteed is.

Instead of drums, discs or the like Light beam, of course, in a suitable other way, for. B. by appropriate Interruption of the headlight circuit, for example on the one controlled accordingly Switch ii '.

3 shows a somewhat different scheme for an encryption of the light beam by periodic interruption of the same. The encryption takes place in this case by means of a clockwork 5o, which moves a switching lever 51 back and forth with the period used for encryption, and thereby closes and opens the headlight current at contact 52 in a corresponding rhythm and thus controls the light of headlight 53 with the corresponding frequency . A selenium cell 54, which is expediently shielded from side light by a screen 55 and, when light strikes, excites a current in its circuit 56, which is amplified via an amplifier 57, serves as the receiver. The increased current is on the one hand via a line 58, a contact 59, the switching lever 6o of a time switch triggering clockwork 61, the line 62 and the coil 63 of an electromagnet with the trigger lever 64 of the clockwork 61 actuating magnet armature 65 and on the other hand via an in one Auxiliary circuit 66 arranged coil 67 of a magnet (relay) 68 is conducted. The clockwork 61 is set up in such a way that it runs in the same cycle as the associated clockwork 5o and interrupts the amplifier circuit of the selenium cell 54 at the appropriate frequency by oscillating the switching lever 6o at contact 59 and always returns to its original position as soon as the coil 63 does not Electricity receives more. The lever 6o is expediently under spring pressure in such a way that it normally rests on the contact 59. With the interruption of the circuit of the selenium cell by the lever 6o, however, the circuit 69 of the external power source 70 via the contact 71 is closed at the same time. In the circuit of the power source 7o, a switch 72 is also arranged, which is closed under the action of a spring and opened by the electromagnet 68 as soon as the selenium cell 54 is hit by light and the coil 67 receives current.

The mode of operation according to FIG. 3 is as follows: At the moment when light falls on the cell 54, the coil 63 is energized in the circuit of the cell or the amplifier 57 with the contact 59, 6o closed, and thus the clockwork 61 is put into operation. As soon as the lever 6o leaves the contact 59 , the circuit via the cell 54 is interrupted, but the current in the coil 63 is nevertheless maintained, since the circuit of the current source 7o at the contact 71 is closed at the same time. In this case, however, a current can only flow if the switch 72 is also closed. However, this is only the case if the cell 54 does not receive any light during this time. The clockwork 5o must therefore be precisely matched to the clockwork 61 so that the headlight current at contact 52 is interrupted at the same time as the switching lever 6o is switched over from contact 59 to contact 71.

If, on the other hand, there is no precise coordination, but if, for example, the selenium cell 54 still receives current after the lever 6o has been switched over to the contact 71, the switch 72 cannot close because the coil 67 is also still energized. The coil 63 is therefore also de-energized and thus the clockwork 61 is put out of operation. If the time switch 5o interrupts the circuit of the headlight 53 prematurely, that is, before the switching lever 6o has switched over to the contact 71 , the current in the coil 63 is also interrupted and the clockwork 61 is switched off.

When the lever 6o springs back, if the selenium cell 54 is still receiving light at this point in time, the clockwork is put back into operation, but is always switched off again when the light hitting the cell 54 does not correspond to the frequency corresponding to the clockwork 61 or a continuous light is cast on the cell 54. If necessary, a device can also be provided which, after the clockwork has been switched off, only allows it to be switched on again after a certain period of time. By changing the length of the contacts 52, 59 , the duration of the interruption can be changed. If necessary, the contacts themselves can be adjustable.

Instead of a shift lever 51 or 6o moving back and forth, of course a rotating switching element can also be used, which in the appropriate order which closes or interrupts contacts with regular or uneven periods. Instead of a clockwork, a specific oscillation can also be used A coordinated vibration system of a mechanical, electrical or other type is used the frequency of the light beam interruption used for encryption is matched. The vibration system used to trigger the drive can in this case be set up so that it only applies to the current frequency generated thereby responds, which corresponds to the natural frequency of the vibration system (Resonance effect). If necessary, different light frequencies can also be used one after the other can be used for encryption.

In the example according to FIG. 4, the encryption is carried out by selecting certain wavelengths of the light. The headlight 8o is for this purpose with a z. B. pivotable filter 81 is provided which, for example, through two colored windows 82 'and 82 "arranged one above the other, next to one another or concentrically to one another, only allows light of two specific wavelengths to pass through which the beam is split up by spectral analysis and thrown against a concave mirror 85. The concave mirror is interrupted at points 86 'and 86 ", specifically at those points where the light refracted in the direction 87', 87" would strike mirror 85 , which is thus fed to the selenium cells 88 'or 88 ". All the remaining light is reflected on the concave mirror 85 and thrown onto the selenium cell 89 , which is arranged at a suitable location, for example in the vicinity of the focal point of the mirror. The encryption takes place here by the filter 81, which only lets through light of such a wavelength or color that the selenium cells 88 'and 88 ″, but not the selenium cell 89 , receive light.

The cell 88 'is connected to the coil gi' via an amplifier go ' Electromagnet g2 ', the cell 88 "go through an amplifier" to the coil gi "one Electromagnets 92 "and the cell 89 via an amplifier 93 both to the coil 94 'of an electromagnet 95' as well as to the coil 94 "of an electromagnet 95 "connected.

By the electromagnets 92 ', 95' on the one hand and 92 ", 95" on the other hand two shift levers 96 ', 96 "alternate against the two assigned to them Magnets pivoted, with the switch lever alternating between the contacts 97 'and 97 " close and open. Expediently, springs 98 ', 98 "are provided, which the levers Try to pull against the magnets 95 ', 95 ". The levers are electrically conductive 96 ', 96 "are arranged one behind the other in the circuit 99 of a power source ioo, in which there is still a coil ioi for switching on the timer io2, which in turn is to be actuated after a certain, possibly only short time interval Sets the drive in motion. If necessary, a special one can also be used in this case Timers come in elimination.

The mode of operation of the device according to FIG. 4 is as follows: As long as light of a different color than that of rays 87 ', 87 "passes through prism 84 enters the receiving device, the selenium cell 89 is excited, so that the lever 96 ', 96 "by the magnets 95, 95", if necessary with the support of the springs 98 ', 98 "or through the self-resilient design of the levers, pivoted clockwise will. The currents possibly also generated by the selenium cells 88 ', 88 "are in this case not strong enough to pivot the levers 96 ', 96 "in the opposite direction. The circuit 99 of the current source ioo is therefore interrupted at the contacts 97 ', 97 ", so that the drive device io2 cannot take effect. The same thing occurs a, if only light of the rays 87 'or only the rays 87 "the receiving device meets, since in this case either the contact 97 'or 97 "is open.

Only if both lights for encryption at the same time serving wavelengths of rays 87 'or 87 ", and only this light that Receiving device can be activated by simultaneously switching the switch lever 96 ', 96 "in the position shown the circuit 99 is closed and thus the timer io2 or the drive, e.g. B. a garage door can be put into operation.

Of course, monochrome or multi-colored light can also be used with the appropriate Selection of the wavelengths, possibly also invisible light can be used. Further the device can also be combined with clockworks in such a way that the Light of different wavelengths one after the other or in connection with a certain one Frequency or the like. Is to be brought into effect. There is an encryption of light also in any other way, e.g. B. by polarization od. Like. For can be used alone or in combination with other types of encryption. To all In some cases, the device can also be used in conjunction with a light barrier Fig. I can be used.

Claims (7)

PATENT CLAIMS: i. Device for starting up a drive by remote control by means of an encrypted light beam, in particular for Opening of a garage door by the headlight controlled according to the encryption on a motor vehicle, characterized in that the drive, for. B. for the Door, one through a light sensitive cell, e.g. B. selenium cell, controlled switching device is connected upstream, which is only encrypted in a certain way, the light-sensitive Cell-hitting light signals by opening or closing an electrical circuit responds and thereby, especially after a certain period of exposure, the transmission for the drive in action. 2. Device according to claim i, characterized in that that the encryption of the light controlling the device is known per se Way depending on the passage of time, e.g. B. by periodic interruption of a Light beam takes place. 3. Apparatus according to claim i and 2, characterized in that that in the light transmitter and in the light receiver as an encryption and decryption device serving clockworks synchronous control effect, z. B. spring mechanisms (14, 39; 5o, 61) installed are, which as a result of synchronous run, z. B. by means of a timer, the drive turn on. 4. Apparatus according to claim 3, characterized by a device z. B. a light barrier (15, 21) or other light sources that have a synchronous Ensures the initial position of the movements. 5. Apparatus according to claim i to 4, characterized in that the fixed light barrier (15, 21) which the Door od. Like. Upstream, initially, z. B. by the approaching vehicle, must be interrupted before the decryption device is put into operation can be. 6. Apparatus according to claim i to 5, characterized in that switching devices (30, 35; 72; 96 ', 96 ") are arranged in the circuit for converting the light energy into electrical energy, which the circuit to the triggering or decryption device (2o ) and switch it off as soon as the receiver receives light that does not correspond to the decryption device. 7. Apparatus according to claim i to 6, characterized in that when used any or periodically interrupted light the triggering device of the drive, z. B. od a clockwork. Like., In the rhythm of the encryption alternately over the light-sensitive cell (16, 54) and via an external drive source, e.g. B. Power source (36, 70), is kept in operation, such that by appropriate control, e.g. B. by means of clockwork, possibly using one of the photosensitive Cell controlled switch (72), the other power source always delivers power, but can only deliver electricity when the light-sensitive cell itself does not have any light receives. B. Device according to claim 7, characterized in that that the clockwork (61) by a coil (63) od. The like. Is put into operation, which in the common circuit of both the photosensitive cell (54) and the External power source (7o) is arranged, the alternating connection of this common Circuit to the cell (54) or the external power source through the clock of the transmitter clockwork (5o) running receiver clockwork (61) is controlled and in the circuit of the external power source (7o) a switch (72) is arranged which is open as long as the light-sensitive Cell (54) receives power, and is closed as soon as cell (54) has no power receives (Fig. 3). 9. Apparatus according to claim 1 and 2, characterized in that the emitted light qualitatively, e.g. B. od by selecting certain wavelengths. Like., is encrypted, 1o. Device according to claim 9, characterized in that that the time switch (1o2) is put into operation by a coil (1o1) or the like, which is arranged in the circuit (99) of a power source (loo), in which further one or more changeover switches (96 ', 96 ") are located, which are in the closed position (97, 97 ") are brought when the receiver (88 ', 88", 89) light the selected Quality (87 ', 87 ") received, and opened if the recipient does otherwise Light (above 89) receives (Fig. 4). Referred publications: German patents No. 466 794, 643 537; French patent specification No. 769214.