RU58474U1 - TRANSPONDER AND TRANSPONDER FOB FOR SECURITY ALARMS - Google Patents

Abstract

The utility model relates to technical means of protecting a vehicle from illegal actions. The security alarm transponder comprises a microprocessor located in the housing and connected to a radio frequency signal transmitter, a power source, and a radio frequency signal detector connected to the microprocessor. At the same time, the microprocessor is configured to implement the functions of generating a coded radio signal and transmitting it to a radio frequency signal transmitter, decoding a request signal from an electronic security alarm unit received by a radio frequency signal transmitter, and encoding a response signal to said request transmitted to a radio frequency signal transmitter. The detector of the radio frequency signal, made with low sensitivity, and the transmitter of the radio frequency signal can be made each with a separate antenna or connected to a common antenna through a switch.

Description

The utility model relates to technical means to ensure the protection of a vehicle from illegal actions, in particular, relates to the design of devices designed for remote and contactless communication with the object security device endowed with the user identification function of this object.

Known transponder for burglar alarm, containing a microprocessor located in the housing associated with the transmitter of the radio frequency signal and the receiver of the radio frequency signal, and the microprocessor is configured to implement the functions of generating a code radio signal and transmit it to the transmitter of the radio frequency signal, decoding the request signal from the electronic security alarm unit received receiver of the radio frequency signal, and encoding a response signal to the specified request transmitted to the transmitter a radio frequency signal and a power source (12 Volt Magazine No. 6, June 2003, article “A room of fear for a careless car owner or thoughts on the protection of car alarms from electronic burglary”).

The specified known decision was made as a prototype for the claimed object.

A disadvantage inherent in the known solution is that the transmission of the code signal from the transponder to the electronic alarm unit is carried out by signals that are well distinguished from the spectrum of other signals. In this case, it is possible to read the code signal and repeat it with another device, which will neutralize the security alarm functions as a system designed to prevent unauthorized access to the protected object.

This useful model is aimed at solving the technical problem of forming a dialogue between the electronic unit located at the guarded object and the transponder (tag) of the user in the mode of increased noise immunity at a given maximum distance.

The technical result achieved in this case is to increase the efficiency of the security function.

The specified technical result for the first device is achieved by the fact that the security alarm transponder comprising a microprocessor located in the housing, connected to an RF signal transmitter, a power source, and an RF signal receiver connected to the microprocessor, made according to the direct detection scheme and with low sensitivity, and a microprocessor configured to implement the functions of generating a coded radio signal and transmitting it to a radio frequency signal transmitter, decoding Igna request from the electronic burglar alarm unit received by the receiver RF signal, and encoding the signal response to said request transmitted in the RF signal transmitter, wherein the RF signal detector receiver and a transmitter radio frequency signal formed each with a separate antenna or linked to a common antenna through a switch.

The specified technical result for the second device is achieved by the fact that the keychain-transponder for alarm, containing placed in the housing

the microprocessor associated with the radio frequency signal transmitter, a power source, and the radio frequency signal receiver connected to the microprocessor, made according to the direct detection circuit and with low sensitivity, is equipped with a control button associated with the microprocessor, when pressed, an unlock code signal is sent in the direction of the electronic alarm unit burglar alarm, and the microprocessor is configured to implement functions, decoding the request signal from electronically a burglar alarm unit, the received RF signal transmitter, and encoding the response signal to said request transmitted in the RF signal transmitter, wherein the RF signal detector and receiver RF signal transmitter each formed with a separate antenna or linked to a common antenna through a switch.

For both examples of execution, the microprocessor can be configured to implement an additional function for checking the request signal according to the “friend or foe” algorithm.

These features are significant and interconnected with the formation of a stable set of essential features, sufficient to obtain a technical result both in terms of the device and in terms of methods.

This useful model is illustrated by specific examples, which, however, are not the only possible ones, but clearly demonstrate the possibility of achieving the required technical result with the given sets of features.

Figure 1 - block diagram of a transponder with separate antennas of the transceiver part;

figure 2 is the same as in figure 1, with one transceiver antenna;

figure 3 is a block diagram of a keychain transponder, with one transceiver antenna.

1. According to the present utility model, the transponder (FIG. 1) for a security alarm, for example, implemented with a user identification function, comprises a microprocessor 1 located in the housing and connected to an RF signal transmitter 2 and a power supply 3. The transponder also includes a coupled with a microprocessor, the receiver 4 of the radio frequency signal, made according to the direct detection scheme and with low sensitivity, and the microprocessor is configured to implement the functions of generating a code radio signal and transmitting it to the transmitter of the radio frequency signal, decoding the request signal from the electronic alarm system unit received by the transmitter of the radio frequency signal, and encoding a response signal to said request transmitted to the transmitter of the radio frequency signal. The detector receiver of the radio frequency signal and the transmitter of the radio frequency signal can be made each with a separate antenna 5, 6 (figure 1) or connected to a common antenna 7 through the switch 8 (figure 2 and figure 3).

The microprocessor can also be configured to implement an additional function for checking the request signal using the friend-or-foe algorithm.

Such a transponder is used for security systems operating in the following way. This method of providing user identification consists in the fact that the user, by means of a transponder, transmits over the radio channel in the direction of the object supplied to the alarm system

the encoded signal, which is received by the receiving part of the security alarm for verification according to a given "friend or foe" algorithm. Upon receipt of the encoded signal from the transponder from the security alarm side, a request is sent to the transponder in the form of an information signal generated using a random number generator, and upon receipt of a corresponding response from the transponder within a specified time, this response is checked using a separate friend-or-foe algorithm »And if the parameters of the transponder response signal coincide with the set control parameters of this response signal, the user is considered identified oh.

The transponder microprocessor can be configured to implement an additional function of generating a coded radio signal and transmitting it to the radio frequency signal transmitter after decoding the radio signal from the transmitter.

When using a burglar alarm with a keyfob removed from the keyfob signal, the user issues a coded signal in the direction of the burglar alarm from the keyfob, upon receipt of the encoded signal from the keyfob from the burglar alarm side, the received signal is checked using the “friend or fob” algorithm and the test result is positive form a signal “your keychain”, during the formation of which, from the alarm system side, a request is sent to the transponder via the radio channel in the form of information The signal generated by the random number generator, and upon receipt of the corresponding response from the transponder within a specified time, check this answer according to a separate “friend or foe” algorithm, and if the parameters of the transponder response signal coincide with the set control parameters of this response signal, the user is considered identified .

An example of a combined keyfob and transponder is shown in Fig.3. This example differs from the previous ones in that the keyfob function and its controls are added to the transponder design. When the control button 9 is pressed (when the control contact is closed), the microprocessor generates an encoded signal according to a predetermined algorithm, which is the keyfob signal, and transmits it using the radio transmitter.

This utility model is industrially applicable, as it can be implemented using existing technologies used in the production of electronic security systems.

Claims (2)

1. A transponder for burglar alarms, comprising a microprocessor located in the housing associated with a radio frequency signal transmitter and a radio frequency signal receiver, and the microprocessor is configured to implement the functions of generating a radio code signal and transmitting it to a radio frequency signal transmitter, decoding a request signal from an electronic alarm block, received by the transmitter of the radio frequency signal, and encoding a response signal to the specified request, transmitted to the transmitter frequency signal, and a power source, characterized in that the RF signal receiver is adapted for direct detection scheme and a low sensitivity, said receiver and transmitter are each formed with a separate antenna or linked to a common antenna through a switch. 2. A key fob-transponder for burglar alarms, comprising a microprocessor located in the housing and connected to a radio frequency signal transmitter and a radio frequency signal receiver, and the microprocessor is configured to implement functions, decode a request signal from an electronic alarm block received by the radio frequency signal transmitter, and encode a response signal to the specified request transmitted to the transmitter of the radio frequency signal, as well as a control button associated with the microprocessor, etc. when pressed in the direction of the electronic alarm unit, a security radio code unlock signal is sent, and a power source, characterized in that the radio frequency signal receiver is made according to the direct detection and low sensitivity circuit, wherein said receiver and transmitter are each made with a separate antenna or connected to a common antenna through the switch.