SU1730648A1 - Burglar alarm device with remote radio communication - Google Patents

Abstract

The invention relates to the field of radio engineering and can be used for protection against theft. The most promising is the use for signaling the opening or hijacking of cars and their effective detection, as well as for protection against hacking of individual garden houses and fire alarms. The purpose of the invention is to increase the information content. The device, if it is necessary to protect many objects at the same time, also provides a high efficiency of use of the frequency range, as it allows for the protection of many objects to use a single frequency radio channel, for example, the fp 26945 kHz frequency allocated for remote alarm signaling. 2 sludge. sl C

Description

The invention relates to the field of radio engineering and can be used to protect against theft of motor vehicles, individual garden houses, as well as to protect against apartment burglary and fire alarms.

The most promising is the use of the proposed device for signaling the opening or stealing of automobiles and for their effective detection.

A security alarm system is known (US Pat. Ms 4023163, cl. G 08 B 29/00, (340-409), providing a communication channel providing information transfer between the protected object and the control point. The means of control in this system is armed The object contains an encoder, a continuously generating code confirming the health of the communication line, an information converter,

forming at least one data bit representing the information to be transmitted to the control point, the selector registering the code bits and data bits, the control means of the selector providing the modified code, which is continuously transmitted over the communication line to the control paragraph. The receiver at the control point contains components that register the modified code. The first means of this receiver, which reacts to the selected bits of the code indicated first, form a signal about the health of the communication line, the second means of this receiver, which reacts to the data bits, produce an output signal representing the transmitted information.

This security alarm system is highly reliable because

CO ON ON J 00

keeps the built-in device for continuous control of the communication line between the protected object and the control point.

However, this system, which implements complex coding and decoding of the transmitted information about the state of the protected object, forms a code confirming the health of the line and provides for a reverse communication channel, including the transmitter and receiver of acknowledgment signals, is very complex, which limits its mass use. .

In addition, this system is energetically uneconomical, since it transmits line control signals continuously, both with and without an alarm.

The device for protection against theft with remote radio communication in US Pat. U.S.A. No. 4,751,499, c. 08 V 13/08, 1984, which reacts to a change in the position of a switch (sensor) mounted on a door or window of a protected object, generates a signal about unauthorized opening of the protected object and transmitting it over the radio to a receiving device alarms.

If the door or window of the protected object, for example, a car, is closed, the signal from the switch (sensor) is not received by the transmitter. In this case, the transmitter is turned off, and the receiver is in standby mode and the power consumed by the transmitting and receiving devices from appropriate power sources, such as batteries or galvanic cells, is minimal.

The advantage of this device, in addition to simplicity and energy efficiency, is the possibility of remote transmission of burglar alarm signals over the radio channel, which eliminates the need for laying communication lines, the cost of maintaining them, extends the range of operation and allows you to protect moving objects, such as cars.

The technical essence of this device is close to that claimed and accepted as a prototype.

This remote-theft anti-theft device contains a transmitting station containing a series-connected switch (unlocked sensor of the protected object), an alarm generator whose active element is the first transistor, a quartz oscillator, a radio transmitter, an active element which is the second transistor, and the transmitting antenna, as well as the receiving station, containing a serially connected receiving antenna, radio signal receiver, quartz filter, low signal amplifier frequency, a block of four valve circuits AND-NOT and a block of switches AC.

In the transmitting station, an analogue of the alarm generator that triggers the alarm transmission mode can be a one-shot.

In a receiving station, an analogue of an AND-NOT valve circuit block providing the activation of an alarm can be an electronic switch, and an analogue of an AC switch block (buzzer) may be an acoustic emitter, such as a loudspeaker.

A disadvantage of this device is the low information content, which limits the identification of protected objects and the localization of moving objects, such as vehicles that have been subjected to unauthorized opening or hijacking.

The aim of the invention is to increase the information content of an alarm device with remote radio communication.

The goal is achieved by the fact that in a device comprising a transmitting station, including a sensor unit, a reference oscillator, a first one-oscillator, the input of which is connected to the output of the sensor unit, and a transmitter, to the output of which the transmitting antenna is connected, as well as the receiving station containing the receiver, To the input of which the receiving antenna is connected, and to the output a band-pass filter, and a switch connected in series, an audio signal amplifier and an acoustic emitter, are connected in series to the transmitting station frequency divider, address counter, memory block and digital-to-analog converter, the output of which is connected to the information input of the transmitter, and the series-connected element IL AND and the second one-oscillator, the output of which is connected to the control input of the transmitter, and the input of the reference generator is connected to the output the sensor unit, and the output with a clock input frequency divider, the second output of which is connected to the first input of the OR element, the second input of which is connected to the output of the first one-oscillator, and the inverse output torogo monoflop is connected to the mounting input address counter and the receiving station administered serially coupled demodulator,

the threshold element and the one-shot, the output of which is connected to the control input of the switch, the input of the alarm demodulator of the alarm is connected to the output of the bandpass filter, and the information input of the switch is connected to the output of the receiver.

The author and the author are not aware of technical solutions containing signs equivalent to the distinctive features of the claimed device.

Similar solutions from other fields of technology, possessing the technical properties of the claimed subject matter, are unknown to the author and the author. Thus, the claimed technical solution, in our opinion, satisfies the criterion of significant differences.

1 shows a block diagram of the device; 2 shows timing diagrams explaining the principle of operation of the device.

The burglar alarm system with remote radio communication includes a transmitting station 1, which includes a series of 2 sensors in series, a reference generator 3, a frequency divider 4, an address counter 5, a permanent memory 6, a digital-to-analog converter 7 and a transmitter 8, k the output of which is connected to the transmitting antenna, the first one-shot 9, the input of which is connected to the output of the sensor unit 2, the element OR 10, the first input of which is connected to the second output of the frequency divider 4, and the second input

- with the output of the first one-shot 9, and the second one-shot 11, the input of which is connected to the output of the element OR 10, the direct output to the control input of the transmitter 8, and the inverse output to the installation input of the address 5, and a receiving station 12 containing receiver 13

- to the input of which the receiving antenna is connected, and to the output - a chain of series-connected band-pass filter 14, alarm demodulator 15, threshold element 16, one-shot 17, switch 18, amplifier 19 and acoustic emitter 20, while the information input of switch 18 is connected with the output of the receiver 13.

Figure 2 shows the following timing diagrams explaining the principle of operation of the device:

a is the signal at the output of the block of 2 sensors;

b - signal at the output of the first one-shot 9; where bdn 1 - the duration of the output pulse;

c is the signal at the first output of divider 4 frequencies, where tr is the period of the following clock pulses;

g is the signal at the output of the second one-oscillator, where g0dn 2 is the duration of the output pulse;

d - the signal at the second output of the 4 frequency divider;

e is the signal at the output of the digital-to-analog converter;

W - amplitude-modulated signal at the output of the transmitter 8; where Tn is the repetition period of transmission cycles;

h is the signal at the output of the bandpass filter 14;

and - the signal at the output of the alarm demodulator 15; where Unop is the response voltage of the threshold element 16;

k is the signal at the output of the threshold element 16;

l - the signal at the output of the one-shot. 17; where go is the duration of the output pulse; m - the signal at the output of the amplifier 19 audio frequency.

The device works as follows.

In the initial state in the absence of an alarm situation in the transmitting station 1 at the output of the sensor unit 2, the potential is low logic level, the transmitter 8 is turned off, and in the receiving station 12 the switch 18 is in the off state. In this case, the input of the audio signal amplifier 19 is disconnected from the output of the receiver 13 and, in the absence of an alarm signal, the noise of the receiver on the acoustic emitter 20 is not heard.

When an alarm situation occurs, recorded by at least one of the sensors (for example, mounted on the doors, hood and roof-boot car; the 2 sensors, the output of the high logic level is set at its output (FIG. 2, a))

the front of which provides the start of the first one-shot 9. At the same time, the output signal of the sensor unit 2 enables the operation of the reference generator 3, generating a fon frequency signal, for example, fon

38.4 kHz.

At the same time, at the first output of the frequency divider 4, a sequence of rectangular pulses is formed (Fig. 2, c) with the following frequency fT, for example, tV 4.8 kHz.

An output pulse (Fig. 2, 6) of the first single-vibrator 9 with a duration of T. A-1, for example 10k1 10 ms, coming through the element OR 10, ensures the start of the second one-oscillator 11. A positive pulse (Fig. 2, g),

formed at the direct output of the second one-shot 11, enables the transmitter 8 to turn on. A negative pulse with a duration of one T2, for example T.0d2 8 s, formed at the inverse output of the second one-shot 11, allows the address 5 to start working at the outputs 1 ... n parallel binary codes, and the arrival of each new clock pulse to the clock input of the counter 5 address increases its output parallel binary code by one.

The output codes of the counter 5 address, received on the address bus of the block 6 of the permanent memory, for example ROM E573RF4 (see the tail of ST. Microprocessors and microcomputers in automatic control systems. - Reference. Ld: Mashinostroenie 1987) provide the original reading alarm codes stored in memory locations with lower addresses, for example, from address 00 to address AR (in hexadecimal).

A digital-to-analog converter 7, for example, a K1I8PA1A DAC (see Gutnikov VG Integral Electronics in Measuring Devices. L .: Energoatomizdat, 1988, p. 239) converts parallel alarm codes with a frequency fT into an analog alarm signal. In the simplest case, the alarm signal is a single frequency signal (Fig. 2, e), for example, a 1.6 kHz signal, a multiple of fT 4.8 kHz.

As an alarm signal, the coding of which is carried out in block 6, a complex code can also be used, which, when transmitted over the air, individually call the owner of the protected object or the security service (for example, a traffic police post).

From the output of the digital-to-analog converter 7, an alarm signal is fed to the information input of the transmitter 8, which transmits it via a radio channel, for example, at a frequency fp 26945 kHz to the receiving station 12.

After reading a sequence of parallel alarm codes recorded in the memory cells of block 6, the address counter 5 reads from memory cells with subsequent addresses, for example, addresses from VO to 4FF (hexadecimal) recorded in the ROM of information signal codes, for example voice information signal.

At the end of the alarm, the digital-to-analog converter

7 converts the stream of parallel codes of the information signal read from the memory of block 6 at a frequency fT to the corresponding analogue

signal of speech information (figure 2, e), for example, a signal that provides the transmission of the following speech information: Car theft VAZ 2108, color yellow, license plate D0613LD.

The transmitter 8 after the transmission of the alarm signal provides for the transmission over the air of this information signal to the receiving station 12 (FIG. 2, g).

The radio signal emitted by the antenna of the transmitting station 1 is received by the receiver 13 of the receiving station 12, which generates an audio signal at the output and then an information signal. Bandpass filter, for example

An electromechanical filter with a passband of Af 15 Hz, selects an alarm (Fig. 2h), which from its output goes to an alarm demodulator 15, for example, a peak detector. The demodulated signal (FIG. 2, I) from the output of the demodulator 15 of the alarm signal is supplied to the threshold element 16.

When the output signal of the demodulator 15 exceeds the tripping voltage

The Unop of the threshold element 16, for example Unop 1 V, a high logic level potential is established at the output of the threshold device (Fig. 2k).

Threshold output signal front

element 16 provides the launch of the one-shot 17, the output of which forms a positive pulse (figure 2, l) with a duration of one, for example t.0d 8 s, which, being fed to the control input of the switch 18, ensures that it is turned on. In this case, the switch 18 connects the input of the audio signal amplifier amplifier 19 to the output of the receiver 13.

The output signal of the receiver 13 is amplified by the power of the audio signal amplifier 19 and is fed to an acoustic emitter 20, for example a loudspeaker, which listens for an alarm signal, for example

the 1.6 kHz signal and the information signal following it (FIG. 2, m), for example, a voice information signal: VAZ 2108 hijacking, color yellow, number plate D0613LD.

At the end of the transmission of the alarm signal and the information signal by the transmitting station 1, the drop of the output pulse of the second one-shot 11 generated at its direct output ensures switching off

transmitter 8. At the same time, the front of a negative pulse generated at the inverse output of the second one-shot 11, resets the counter of the address 5 to its original state.

After the reception of the transmitted message is completed, the output pulse of the monoblock 17 of the receiving station 12 switches off the switch 18, which disconnects the input of the audio amplifier 19 from the output of the receiver 13 and, thus, blocks the listening noise on the acoustic emitter 20 of the receiver.

The signal (FIG. 2, d) generated at the second output of the 4 frequency divider with the repetition period Tn, for example Tp 27 s, coming through the IL-10 element to the input of the second single vibrator 11, makes it periodically start, providing in the presence of alarm situations, automatic repetition of alarm and information signal transmission cycles, for example, every 27 seconds. The effectiveness of the invention is that by introducing into the device, comprising a transmitting station, comprising a sensor unit, a reference oscillator, a first one-shot vibrator and a transmitter, as well as a receiving station comprising a receiver, a filter, a switch, an audio signal amplifier and an acoustic radiator, into the transmitting the station of the OR element and the second one-shot, the circuit from the series-connected frequency divider, the address counter, the memory block and the digital-to-tax converter, and the receiving station - the circuit from an increase in the informativeness of the burglar alarm device with remote radio communication is achieved by successively connected demodulator, threshold element and one-shot.

The high information content of the device when compared with the device prototype, due to the possibility of synthesizing various types of alarms and voice information signals at the transmitting station, expands the range of application of this device.

The device can be used to simultaneously protect groups of individual houses from fire or burglary. At the same time, in the transmitting stations installed in the protected houses, the blocks corresponding to the verbal information about the address of the protected house and the nature of the monitored alarm situation (fire, burglary) must be recorded in the blocks of the permanent memory, and the receiving station at the control point may be alone since

when receiving a synthesized information signal, you can listen to the voice information about the address of the corresponding protected house and the nature of the alarm.

High information content and availability of remote radio communication determine the expediency of widespread use of the device for the protection of moving objects,

for example cars. At the same time, the completeness of information about a protected mobile object embedded in the transmitted signal, the frequency of transmission of information signals provide the ability to quickly identify a mobile object and detect it. So, for example, when equipping posts or operational workers of the traffic police with simple and, consequently, small-sized wearable receiving stations,

Any car equipped with a hijacking station that automatically transmits information about the make, color and license plate of this car can be quickly detected and delayed.

The advantage of the device is also high efficiency of use of the frequency range, since for the protection of many objects can be used

radio channel of one frequency.

Claims (1)

Invention Formula Security alarm device remotely containing a transmitting station, including a sensor unit, a reference generator, a first single vibrator, the input of which is connected to the output of the sensor unit, and a transmitter, to the output of which the transmitting antenna is connected, the receiving station containing the receiver, whose input is connected An antenna, a band-pass filter, whose input is connected to a receiver's output, and a switch connected in series, an audio frequency signal amplifier and an acoustic emitter, characterized in that ormativnosti, introduced to the transmitting station frequency divider, address counter, constant memory unit, digital-to-analog converter, OR element, second one-shot, demodulator, threshold element, one-shot entered into the receiving station, the output of the sensor block is connected to the input of the reference generator, the output of which is connected to the input frequency divider, the first output of which is connected to the counter clock input addresses whose outputs are connected to the inputs of a permanent memory unit whose outputs are connected to the inputs of a digital-to-analog converter, the output of which is connected to the information input of the transmitter, the second output of the frequency divider is connected to the first input of the element OR, the output of which is connected to the input of the second one-oscillator the output of which is connected to the control input of the transmitter, the inverse output of the second one-shot is connected to the input resetting the address counter, the output of the first one-shot is connected to the second input of the OR element, at the receiving station the output of the band-pass filter is connected to the input of the demodulator whose output is connected to the input of the threshold element whose output is connected to the input of the single-vibration the output of which is connected to the control input of the switch, output the receiver is connected to the information input of the switch. x Editor T.Orlovska Compiled by V.Romanov Tehred M. Morgental Corrector