EP1049844B1 - Remote control device - Google Patents

Description

The invention relates to a remote control device for Control of at least one function of access devices.

There are radio remote control devices for controlling Access devices e.g. to control a garage door operator known, the one transmitter and one Have recipients, with the recipient inside the garage is arranged and the drive for the garage door activated. The user owns a transmitter which sends coded signals, in which coded Signal identification data are included. The receiver decodes the respective transmission signal and compares the identification data with in one Storage device stored identification data. If the identification data match the receiver controls the drive of the garage door its actuation. With such a remote control device the transmitter is usually mobile, for example, it is stored in a vehicle or built in directly so that the user at all times can operate the transmitter if he with his Wants to drive the vehicle into or out of its garage. If the transmitter is to be installed in the vehicle installation measures must be taken retrospectively and it is not possible from the outset a transmitter in one To provide the vehicle by the vehicle manufacturer, because the sender to the receiver and the by the Receiver-controlled garage door operator assigned and the manufacturer of the vehicle does not know whether and which garage door operator the user has in his Wants to install or has installed a garage.

From US-A-5 686 904 is a self-learning security system with an encoder and a decoder known in which the encoder including information a saved user key using a stored non-linear Encoding algorithm to generate a value that is transmitted to the decoder. The User key on a unique manufacturer defined master key (system identification word) and a serial number. The decoder decodes the value using the master key and of the algorithm stored in the decoder.

It is therefore an object of the present invention to Remote control device for controlling at least one Function of access devices to create the with regard to the different manufacturers of access devices is manufacturer-independent, and different access devices for the users enable equal access.

This object is achieved by the features of the main claim solved.

According to the invention is a remote control device to control at least one function of Access devices provided several types of transmitters and a kind, i.e. a uniform The receiver has, the receiver being the access device controls and where the transmitters of the respective Type a system identification word assigned to the type and have different serial numbers, for example, each type assigned to a manufacturer is. The single recipient, i.e. the one kind von Receiver has the different system identification words of the different types of transmitters for example stored in a microcontroller, so the broadcast signal from any type of transmitter can be understood by the recipient. With this Remote control device it is possible for the receiver a single microcontroller with the majority design system identification words and to produce this in large numbers. The transmitters with the manufacturer-specific system identification word fitted. To an equal Access for the different types of Receiving stations must, however, have an agreement regarding the serial numbers of the transmitters to be assigned of different types. Corresponding areas of the invention are in the receiver stored by serial numbers, each area a system identification word, i.e. a kind of Assigned to transmitter. This measure ensures that the receiver is universal, the manufacturers of the different access devices but their independence with regard to their broadcasters preserve, i.e. the transmitter of the manufacturer, for example 2 can not the manufacturer 3 recipient activate and vice versa. The individual manufacturers of the access devices is only your own system identification word known.

By the measures specified in the subclaims are advantageous further developments and improvements possible.

Advantageously, a universal transmitter, i.e. another type of transmitter may be provided, the one different system identification word to the other types of transmitters, their serial numbers however, are unrestricted. In this way can a universal transmitter e.g. in automobiles from automobile manufacturers be installed from the start.

In a further advantageous embodiment to increase security a bill of exchange or Roll code for coding and decoding the transmission signals used so that the transmission signal at changes every time the transmitter is pressed. For synchronization of the transmitter and receiver is thereby from the transmitter current synchronization information encoded in Transmitted signal delivered, compared in the receiver becomes. In a preferred embodiment given tolerance window regarding the evaluation, with a desynchronization due to a Operation of the transmitter outside the reception area the receiver nevertheless actuates the access device is made possible.

An embodiment of the invention is in the Drawing shown and is in the following Description explained in more detail. The only figure shows the schematic representation of the remote control device according to an embodiment of the invention.

In the single figure is a remote control system that works on the radio basis, shown in the scheme. The remote control system includes a receiver 10 which is designated as a universal recipient, and several Types of transmitters 1 to 5, with transmitters 2 to 5 can be manufacturer-specific.

The transmitters 2 to 5 each comprise a storage device, in the a system identification word that is specific to the type of transmitter, and a serial number assigned to each sender of a kind of Assigned to stations 2 to 5 is saved. Farther each transmitter contains a processing unit or an encoder, the algorithm known per se contains, using the system identification word and the respective serial numbers and possibly further ones in the storage device stored or contained in the encoder Information a transmission signal is generated which is transmitted to the receiver 10.

As can be seen in the figure, everyone is of Transmitters 2 to 5 in addition to the system identification words SI 2 to SI 5 assigned serial number range, which in Figure for transmitter type 2, for example with 1 to 999999 is specified. Within these areas, the Serial numbers from different channels one Channel type can be assigned.

The receiver 10 also has a storage device and a processing unit or a decoder to be trained as a microcontroller can. In the receiver 10, i.e. in the storage device or in the microcontroller are the system identification words SI 2 to SI 5 of each Channel types 2 to 5 are stored and are also the respective transmitter types 2 to 5 and the system identification words assigned serial number range saved. The recipient also contains the algorithm or the mathematical basis which the transmitters 2 to 5 encode the transmission signals.

The transmitter and receiver of the remote control device can control different functions, for example can when using the remote control device for access to a garage or for another entry control device with a Transmitter and receiver opening and closing the garage door, the lighting and, for example, the activation controlled or deactivation of an alarm system become. The functions are on one or programmed several buttons of the respective transmitter, corresponding buttons or switches on the receiver 10 are provided. If multiple functions from the transmitter are controlled, the information on the Function included in the transmission signal and to the Transfer recipient.

When a transmitter is pressed the coding process initialized, i.e. the fixed deposit and not Readable system identification word and the serial number of the respective transmitter control the given one Algorithm that functions as a transfer function the corresponding processing unit e.g. 64 Provides a bit long code word. This includes under other also encodes the information about the desired function to be carried out, the synchronization state of the transmitter and the unencrypted serial number of the transmitter.

The above-mentioned transmitted signal or code word arrives at the receiver 10 by being checked first whether the serial number is from a previous one Initialization or synchronization stored in memory was and is present. If not Case, the transmitted information is ignored and the transmitter treated as unauthorized. Is the serial number all necessary information is stored, namely system identification word, serial number and algorithm before the transmitted transmission signal to decrypt. The system identification word is correct does not match, no decryption be made and the transmitter is again called recognized without authorization. If the identification word is present in the receiver, the signal is decoded and decrypted and the recipient checks whether the serial number of the transmitter in the the system identification word assigned area falls. Is not this the case, the function is not executed. If all values match, the desired one Control made.

An alternating or Rollcode used by the coding at each Coding process, i.e. each time you press the send button of the transmitter is changed. This will make eavesdropping a code once sent and then Play by an unauthorized broadcaster impossible due to the constant changing of the code made. For example, in the receiver and in the transmitter an internal counter may be provided, the Algorithm uses the counter reading in the Broadcast signal is incorporated. However, others can Measures for the production of the change code be provided.

So that sender and receiver with regard to the change code must match, a synchronization or a training of the recipient on the respective Transmitter can be made. This synchronization or teaching can only be carried out successfully if the same system identification word in the transmitter and in the receiver is deposited. For synchronization or to learn a recipient must be on this a voting button or a voting switch for the desired function can be pressed. So that will the receiver 10 in the synchronization or teach-in mode brought. Then the button on the transmitter or the input element that actuates this function should be assigned. The transmitter then transmits the coded transmission signal described above, the transfers all information to the recipient who in synchronization mode now the serial number, the information via the pressed key and the synchronization information of the transmitter stored in the memory. Immediately afterwards the same button must be on the transmitter be pressed again. Because the serial number already stored in the recipient's buffer is decrypted and compared again the synchronization information. This must now by a precisely defined value from the previous one saved deviations. If so, be the information about serial number and synchronization finally saved and the recipient returns in the normal operating state and the learning or the synchronization was successful. If more Voting buttons for the different functions the same process can be provided for each other existing voting buttons are carried out, the assignment to the individual functions is free can be done.

If a send button is outside the reception area operated by the receiver, the synchronized System between transmitter and receiver fall out of step, there after another actuation in the reception area i.e. after transmission of the transmitted signal on the recipient decrypting the current Provides synchronization information from the transmitter, which, however, does not differ in the desired way the stored information differs so that the receiver is the one that is connected to it Control device would not control.

To avoid this there is a so-called in the receiver Tolerance window for the deviations between the in Receiver stored synchronization information and the current synchronization information transmitted by the transmitter intended. Is the synchronization information in the specified predetermined tolerance window, is the desired function anyway executed. The first tolerance window can still a second tolerance window is saved in the receiver be larger than the first tolerance window. If the mentioned deviation lies outside the first Tolerance window but within the larger one selected second tolerance window, the current synchronous information cached and the desired one Function not carried out. For the user the impression that the send button is not neat has pressed and this normally pushes them in second time. Now all the information is back transmitted and decrypted and the comparison of the Synchronization information provides the expected Result and the selected function is carried out. At the same time, the current information is back saved and the transmitter and receiver run again synchronous. The small tolerance window includes e.g. Deviations for 16 operations outside the reception area and the larger deviations from very much more activities. Has the button more often pressed than the operations of the second larger The system cannot synchronize the tolerance window and no more functions are performed. In this case a complete resynchronization must be carried out be carried out using voting keys.

In certain cases it may be desirable that the Radio remote control system comprises a universal transmitter, for example in the case of an entry control device in an automobile, for example in the Sun visor or is arranged in the interior mirror head. In the case of an existing universal transmitter, the Car manufacturers do this independently of the others Install types of transmitters 2 to 5, i.e. independently of which entry control device the user will use the vehicle later. This is in the single figure shown in dashed lines, the Universal transmitter is assigned to transmitter type 1. This Universal transmitter 1 also has a system identification word SI 1, which is different from the others distinguishes and also in the recipient 10 is stored. So that this transmitter 1 as Universal transmitter can be used is not him Serial number range assigned, but the serial numbers can be assigned without restriction. The The sender can then use all receivers of receiver type 10 speak to.

If one of the transmitters 1 to 5 is lost or that Automobile in which the transmitter is installed, stolen prevent unauthorized access receives. You can use the saved serial numbers be deleted in the receiver, whereby any Voting button on the receiver for a longer one Time is pressed continuously. Then everyone will serial numbers of all ever stored in memory synchronized station deleted.

The memories contained in the receiver are not volatile, i.e. if the power supply fails the information contained therein is not lost. All possible operating states of the Receivers are shown on a display. The recipient must of course be locked up, So be arranged in the access-protected room unauthorized persons at the press of a voting key to prevent the recipient.

In some cases it may be desirable to have feedback from the receiver to the sender. In these cases the transmitter is with a receiving unit and the receiver is provided with a transmitter unit. Via this bidirectional transmission link the recipient can, for example, provide feedback indicate whether the desired function has been carried out. This option is particularly useful when activated an alarm system via radio is important because it is recognized whether it is actually initialized has been. Of course, you can use the bidirectional Transmission path also other signals like a signal about the construction of the transmission lines Synchronization signals or other tuning signals be transmitted.

In the prescribed embodiment, the Radio transmission, for example at one frequency of 433 MHz. Of course are other transmission paths that perform the function conceivable.

Claims (14)

1. Radio control device for controlling at least one function of access devices with at least one transmitter (1 to 5) and one receiver (10), wherein the receiver (10) is in contact with the access device, and the at least one transmitter has a memory device for storing a system identification word and a serial number, and an encoder for encoding the transmission signal by means of an algorithm known per se by using a system identification word (SI 1 to SI 5) and the serial number, wherein the receiver (10) has a memory device for storing the system identification word and serial numbers and a decoder for decoding the received transmission signals by means of an algorithm and furthermore comprises at least one tuning unit through which the at least one transmitter and the receiver can be tuned by transmitting the serial number and storing the same in the receiver
   characterized in that
   several types of transmitters (2 to 5) and one type of receiver (10) are provided and each type of transmitter (2 - 5) is allocated a different system identification word (SI 2 - SI 5) and a different range of serial numbers comprising a plurality of serial numbers and the receiver of the one type stores all the system identification words (SI 2 - SI 5) and the serial number ranges.
2. Device according to claim 1, characterised in that the receiver is designed in such a way that it compares the serial numbers and the system identification word contained in the transmission signal with the stored data and, when these match, activates the access device.
3. Device according to claim 1 oder claim 2, characterised in that a further type of transmitter (1) with allocated system identification word (SI 1) is provided which is configured as an universal transmitter and whose serial number is not associated with any range of serial numbers, the system identification word being stored in the memory device of the receiver (10).
4. Device according to one of the claims 1 to 3, characterised in that the algorithm contains a roll and change-over code for changing the code for encoding the transmission signal after each transmission of a coded transmission signal.
5. Device according to one of the claims 1 to 4, characterised in that during the tuning of the respective transmitter (1 to 5) to the receiver (10) together with the serial number a synchronisation information about the state of the roll or change-over code is tranmittable from the respective transmitter to the receiver.
6. Device according to claim 5, characterised in that for a non-expected deviation of the synchronisation information stored in the receiver with the transmission signal to the synchronisation information transmitted currently a first tolerance window is input in the receiver, within which the control of the at least one function can still be carried out.
7. Device according to claim 6, characterised in that a second, bigger tolerance window is input in the receiver, and which is designed in such a way that, if the deviation of the respective synchronisation information is located within the bigger tolerance window, a storing in a bufferof the current synchronisation information and no control is carried out and during a renewed transmission of a transmission signal a comparison of the temporally stored synchronised information with the current one is carried out and with the expected deviation the control of the at least one function can still be carried out.
8. Device according to one of claims 1 to 7, characterised in that the transmitter has a selection unit for selecting a number of the functions of the access device to be controlled, wherein the information about the function to be controlled is contained encoded in the transmission signal and that the tuning unit of the receiver is designed to tune the respective function to be controlled.
9. Device according to one of the claims 1 to 8, characterised in that the tuning unit has one or more keys or switches.
10. Device according to one of claims 1 to 9, characterised in that in the receiver there is provided an erasure device for erasing the stored serical numbers.
11. Device according to one of the claims 1 to 10, characterised in that the respective transmitter has a receive unit and the receiver has a transmitter unit and that the transmitter unit of the receiver is designed to transmit an acknowledgment signal concerning the received transmission signal or about the function carried out, the synchronisation signals and/or the tuning signals of the receive unit of the transmitter.
12. Device according to one of the claims 1 to 11, characterised in that the transmitters and the receiver are formed as radio devices.
13. Device according to claim 12, characterised in that the frequency of the transmission signals is 433 Mhz.
14. Device according to one of the claims 1 to 13,characterised in that the respective transmitter is arranged in a vehicle and that the access device is a control device for the operation of a garage door.

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