RU2520413C1 - Device for simulation of protection of group of controlled objects based on logic xor - Google Patents

Abstract

FIELD: fire safety.

SUBSTANCE: device of simulation of protection of group of controlled objects consists of a control unit comprising a management unit, a unit of generating of codegram of the next step, the generator of first pseudo-random sequence (generator of PRS-1), the modulator unit, the generator of second pseudo-random sequence (generator of PRS-2), the switchboard comprising a switching unit with N lines of communication, N units of comparison on the number of the controlled objects, each of which consists of a memory element of the value of the generator PRS-2 of the control unit (ME of the value of the generator PRS-2 of the control unit), the unit of logical operations XOR (logical operation "exclusive OR") consisting of n units XOR, on the number of bits in the binary representation of the codegrams of the first and second pseudo-random sequences, the memory element of the value of the generator PRS-2 of the controlled objects (ME of the value of the generator PRS-2 of the controlled objects), control unit of serviceability of the object and the controlled object, consisting of a unit of memory of the next step, the comparison unit, the demodulator, the memory unit, the matching device, the modulator, the generator PRS-2.

EFFECT: providing simultaneous protection of group of controlled objects connected independently from each other on the star topology, simplification of the technical implementation and improvement of the data processing rate.

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Description

FIELD OF THE INVENTION

The invention relates to techniques for security and fire alarms, in particular to devices for imitating controlled objects, and can be used to protect objects.

State of the art

A device for imitating controlled objects, comprising a signal selection unit, which is part of the transmission unit, a signal selection unit, which is part of the translator, a control unit, which is part of the information reception unit, a communication line, wherein a sensor comprising a matching device is introduced into the transmission unit, modulator, demodulator, serial-to-n-parallel conversion unit, memory unit, start sequence memory unit, comparison unit, second pseudo-random sequence generator sequence (PSP-2 generator), a block for converting an n-bit parallel combination to a serial one, an information processing unit containing a matching device, a modulator, a demodulator, a block for converting a serial combination to parallel, a memory block for the starting sequence, a key generator, a generator of the first pseudo-random sequence (PSP-1 generator), PSP-2 generator, control value memory block, first memory device, second memory device, CPA block vnniya, the block of transformation of a parallel combination to serial (see. RF patent No. 2310236, cl. G08B 25/04, 2006.01).

The device allows you to provide control over the protected object. However, this device does not allow simultaneous imitation protection of several controlled objects. In addition, with long-term monitoring of the device for the protection of controlled objects, revealing the repetition period of the pseudo-random sequence, we can understand the pattern of generating values. Therefore, it is enough to intercept the values arriving at the input of the controlled object directed from the information processing unit to the object PSP-2 generator, and to carry out the substitution of output values based on the data obtained as a result of observation.

There is a system for interfacing devices for simulating controlled objects, which contains two memory cells, a signal comparison unit, three signal selection blocks, three matching devices, a modulator, two demodulators, a block for converting a parallel n-bit combination to a serial, two blocks for converting a serial combination to n -bit parallel combination (see RF patent No. 2387017, CL G08B 25/04, 2006.01).

The device is used in conjunction with a device for simulating controlled objects, while allowing to organize a system consisting of many controlled objects.

The disadvantage of this device is that it is not able to independently provide imitational protection of a group of controlled objects, but only extends the functionality of a simulated protection device of controlled objects, solving the problem of simultaneous imitating a group of objects. The problem of identifying the patterns of generated values remains unresolved.

If the communication line or one of the objects fails, the operation of the entire system is disrupted.

There is also a device for imitating a group of monitored objects, comprising a fault indication unit, an address counter, a control unit, an address generating unit included in the information receiving unit, a signal selection unit included in the translator, an information processing unit including a start sequence memory unit, a block for converting an n-bit parallel combination into a serial one, a modulator, a matching device, a key generator, a generator of a first pseudo-random sequence ( PSP-1 generator), demodulator, comparison unit, first storage unit, second pseudo-random sequence generator (PSP-2 generator), electronic key, serial to parallel conversion unit, second storage unit, memory register of the number of monitored objects, cycle counter , a communication line, a signal selection unit included in the transmission unit, a sensor including a starting sequence memory unit, a comparison unit, a second pseudo-random sequence generator (PSP-2 generator), a block for converting a serial combination to n-bit parallel, a memory block for an individual device address, a block for converting an n-bit parallel to a serial block, an address part verification block, a modulator, a demodulator, a memory block, a matching device (see . RF patent No. 2417452, cl. G08B 25/00, 2006.01). The device allows for simultaneous imitation protection of several controlled objects connected in series. However, of all the above inventions, this device is the most imitation.

However, an imitation protection device of a group of monitored objects does not provide an adequate level of imitation protection, since during prolonged monitoring of the device’s operation, an attacker can compose “request-response” statistics and infiltrate the system for some time.

Another disadvantage of the device is that when the communication line or one of the sensors fails, the operation of the entire system is disrupted.

These shortcomings were eliminated in the device of imitating a group of controlled objects, which allows simultaneous imitating of a group of controlled objects with a significant complication of revealing the patterns of generating pseudorandom values in the process of monitoring the operation of the device and expanding the capabilities of known devices for signaling the state of controlled objects. This device comprises a fault indication unit, an address counter, a control unit, an address generating unit included in the information receiving unit, a signal selection unit included in the translator, an information processing unit including a start sequence memory unit, an n-bit parallel combination conversion unit in serial, modulator, matching device, key generator, first pseudo-random sequence generator, shift register, shift counter, comparison unit, first a memory device, a second pseudo-random sequence generator, a demodulator, an electronic key, a serial to parallel conversion unit, a second storage unit, a memory register of the number of monitored objects, a cycle counter, a communication line, a signal selection unit, which is part of the transmission unit, a sensor including start sequence memory unit, comparison unit, second pseudo-random sequence generator, shift register, shift counter, pos conversion unit an exploratory combination into n-bit parallel, a memory block of an individual device address, a block for converting an n-bit parallel to a serial block, an address part verification block, a demodulator, a memory block, a matching device, a modulator (see RF patent No. 2447512, cl. G08B 25/00, 2006.01).

The disadvantage of this device is the structural complexity of the technical implementation, which ultimately leads to a decrease in the reliability of the device and an increase in the cost of manufacture. This disadvantage is eliminated in the following invention, which uses a memory store with N stacks constructed on a first-come, first-out basis (FIFO).

The security device of the group of monitored objects connected according to the star topology contains a control unit including a control unit, a next-cycle codogram generation unit, a PSP-1 generator, a modulator, PSP-2 generator, a switch, a demodulator, a memory store with N stacks built according to the FIFO principle, a comparison unit, a memory unit, a communication line, a sensor including a next-cycle memory unit, a comparison unit, a demodulator, a memory unit, a matching device, modulator, PSP-2 generator (see RF patent No. 2455696, cl. G08B 25/00, 2006.01).

The disadvantage of this device is the processing time of numerical sequences coming from monitored sensors, since a memory store with N stacks built on the FIFO principle is used, which increased the processing time and excluded the simultaneous verification of all sensors. This disadvantage is eliminated in the following invention, which allows you to simultaneously check all controlled objects.

Disclosure of invention

The objective of the invention is to develop a device for imitating a group of monitored objects, which allows for simultaneous verification of a group of monitored objects connected to the control unit according to the star topology, while maintaining the essential features of previous inventions in terms of the difficulty of identifying patterns of pseudo-random value generation during monitoring the operation of the device, expanding the capabilities of known devices for signaling the status of controlled objects and control ix technical implementation compared to previous devices.

The technical result that can be obtained using the present invention is reduced to providing simultaneous protection of a group of controlled objects connected independently from each other according to the star topology, expanding the functionality of known devices about the state of controlled objects, simplifying technical implementation and improving data processing speed compared to previous devices.

The technical result is achieved with the help of an imitation protection device for a group of controlled objects, consisting of a control unit containing a control unit, a codogram formation unit for the next clock cycle, a first pseudorandom sequence generator (PSP-1 generator 4), a modulator block, a second pseudo-random sequence generator (PSP- generator 6 2), a switch containing a switching unit connected to N communication lines, N comparison units according to the number of monitored objects, each of which consists of a storage device properties of the value of the PSP-2 generator of the control unit (memory 10 of the value of the generator PSP-2 of the control unit), the block of logical operations XOR (logical operation "exclusive OR"), consisting of n XOR blocks, according to the number of bits in the binary representation of the codograms of the first and second pseudorandom sequences, memory device values of the generator PSP-2 of the controlled objects (memory 12 values of the generator PSP-2 of the objects), the unit for monitoring the health of the object and the controlled object, consisting of a memory unit of the next clock, comparison unit, dem modulator, memory block, matching device, modulator, generator ПСП-2,

moreover, the first output of the control unit, which is part of the control unit, is connected to the first input of the codogram formation unit of the next cycle, the second output of the control unit is connected to the first input of the control of the switching unit included in the switch, the third output of the control unit is connected to the first input of the PSP- generator 2, the fourth output is connected to the input of the generator PSP-1,

the output of the codogram forming unit of the next clock is connected to the first input of the modulator,

the first output of the PSP-1 generator is connected to the second input of the codogram formation unit of the next clock, the second output of the PSP-1 generator is connected to the first input of the PSP-2 generator,

the output of the modulator is connected to the second input of the switching unit included in the switch,

the output of the PSP-2 generator is connected to the first input of the memory of the value of the PSP-2 generator of the control unit of each of the N comparison blocks included in the switch,

the first input-output of the switching unit, which is part of the switch, is connected via a communication line to the input-output of the matching device, which is part of the first controlled object, the output of the switching unit is connected to the first input of the memory value of the generator PSP-2 of the controlled objects of the comparison unit included in the composition of the switch, the remaining outputs of the switching block are connected to the corresponding comparison blocks,

N outputs of the memory value of the generator PSP-2 of the control unit and N outputs of the memory values of the generator PSP-2 of the controlled objects, each of the N comparison blocks included in the switch, are connected to the N inputs of the logical operation block XOR of each of the N comparison blocks included switch

the output of the logical operation block XOR of each of the N comparison blocks included in the switch is connected to the input of the health monitoring unit of the object, each of the N comparison blocks included in the switch,

the output of the health monitoring unit of the object, each of the N comparison units included in the switch, is connected to the first input of the control unit,

the input-output of the switching unit included in the switch is connected via a communication line to the input / output of the matching device included in the controlled object, the first output of the matching device is connected to the first input of the demodulator, the output of the demodulator is connected to the input of the memory block, the output of the memory block is connected to the second input of the comparison unit, the output of the memory unit of the next clock is connected to the first input of the comparison unit, the output of the comparison unit is connected to the input of the PSP-2 generator, the output of the PSP-2 generator is connected to the input modulator, the modulator output is connected to the first input of the matching device.

Brief Description of the Drawings

In Fig.1 shows a block diagram of a device for imitating a group of controlled objects, and in Fig.2 - the address part and the code word PSP.

The security device of the group of monitored objects (Fig. 1) contains a control unit 1, a control unit 2, a codogram formation unit for the next clock 3, a generator of the first pseudorandom sequence 4 (generator 4 PSP-1), a modulator block 5, a generator of the second pseudorandom sequence 6 (generator 6 PSP-2), switch 7, N comparison blocks according to the number of monitored objects 8, switching block 9, memory of the PSP-2 generator value, control unit 10 (memory 10 of the PSP-2 generator value of the control unit), logical operation block XOR 11 (logical operation "exclusive OR"), memory device value generator ПСП-2 of controlled sensors 12 (memory 12 generator value ПСП-2 of controlled objects), health monitoring unit of object 13, N communication lines 14, controlled object 15, block the next clock memory 16, the comparison unit 17, the demodulator 18, the memory unit 19, the matching device 20, the modulator 21, the generator 22 PSP-2.

The implementation of the invention

The security device of the group of monitored objects consists of a control unit 1 containing a control unit 2, a next step codogram generating unit 3, a first pseudo-random sequence generator 4 (PSP-1 generator 4), a modulator block 5, a second pseudo-random sequence generator 6 (PSP- generator 6 2), a switch 7, containing a switching unit 9 with N communication lines 14, N comparison units 8 according to the number of monitored objects, each of which consists of a memory 10 of the PSP-2 generator value, a control unit (З 10 values of the PSP-2 generator of the control unit), block 11 of logical operations XOR (logical operation “exclusive OR”), consisting of n XOR blocks, according to the number of bits in the binary representation of the codograms of the first and second pseudorandom sequences, the memory 12 of the value of the PSP generator 2 monitored objects (memory 12 values of the generator PSP-2 monitored objects), the unit 13 monitoring the health of the object and the monitored object 15, consisting of a block 16 of the memory of the next clock, block 17 comparison, demodulator 18, block 19 memory and matching device 20, a modulator 21, oscillator 22 CAP-2

moreover, the first output of the control unit 2, which is part of the control unit 1, is connected to the first input of the next cycle codogram forming unit 3, the second output of the control unit 2 is connected to the first control input of the switching unit 9 included in the switch 7, the third output of the control unit 2 connected to the first input of the generator 6 PSP-2, the fourth output is connected to the input of the generator 4 PSP-1,

the output of the codogram forming unit 3 of the next clock is connected to the first input of the modulator 5,

the first output of the generator 4 PSP-1 is connected to the second input of the block 3 forming the codogram of the next clock cycle, the second output of the generator 4 PSP-1 is connected to the first input of the generator 6 PSP-2,

the output of the modulator 5 is connected to the second input of the switching unit 9, which is part of the switch 7,

the output of the generator 6 PSP-2 is connected to the first input of the memory 10 values of the generator PSP-2 of the control unit of each of the N comparison units 8 included in the switch 7,

the first input-output of the switching unit 9, which is part of the switch 7, is connected via the communication line 14 to the input-output of the matching device 20, which is part of the first monitored object 15, the output of the switching unit 9 is connected to the first input of the memory 12 of the PSP-2 generator value controlled objects of the comparison unit 8, which is part of the switch 7, the remaining outputs of the switching unit 9 are connected to the respective comparison units,

N outputs of the memory 10 values of the generator PSP-2 of the control unit and N outputs of the memory 12 values of the generator PSP-2 of the controlled objects, each of the N comparison blocks 8 included in the switch 7 are connected to the N inputs of the block 11 of logical operations XOR of each of the N blocks 8 comparisons included in the switch 7,

the output of the block 11 of logical operations XOR of each of the N comparison blocks 8 included in the switch 7 is connected to the input of the health monitoring unit 13 of the object, each of the N comparison blocks 8 included in the switch 7,

the output of the control unit 13 of the health of the object, each of the N comparison blocks 8 included in the switch 7 is connected to the first input of the control unit 2,

the input-output of the switching unit 9, which is part of the switch 7, is connected via the communication line 14 to the input-output of the matching device 20, which is part of the controlled object 15, the first output of the matching device 20 is connected to the first input of the demodulator 18, the output of the demodulator 18 is connected to the input of the memory unit 19, the output of the memory unit 19 is connected to the second input of the comparison unit 17, the output of the next memory unit 16 is connected to the first input of the comparison unit 17, the output of the comparison unit 17 is connected to the input of the generator 22 ПСП-2, the output is the generator 22 CAP-2 is connected to the input of the modulator 21, the modulator 21 output is connected to the first input of the matching device 20.

The device imitating a group of controlled objects works as follows.

The functioning of the device imitating a group of controlled objects is carried out in broadcast mode or in the individual verification mode of controlled objects.

In block 3 of the formation of the codogram of the next measure, 2 types of codograms are formed (Fig. 2), containing the following commands:

1) initialization command:

a) with a broadcast address — initialization of generators 22 PSP-2 of controlled objects with 15 code word PSP-1 prepared by generator 4 PSP-1;

b) with an individual address of the inspected object - contains the code word PSP-1 generated by the generator 4 PSP-1, and is intended for individual verification of a particular controlled object 15;

2) a command for polling objects with a broadcast address — when transmitted to controlled objects, it forces the previously initialized generators 22 PSP-2 to prepare the next code word PSP-2 and send it to control unit 1.

Monitored objects are connected to the central device according to the star topology.

After the start command is received by the control unit 2, which is part of the control unit 1, commands from the first and fourth outputs are simultaneously sent to the PSP-1 generator 4, which generates the code word of the PSP-1 sequence and transmits it to the codogram block 3 of the next cycle , and to block 3 of the codogram formation of the next clock cycle, generating an initialization command with a broadcast address. From the second output of the control unit 2, a control command is sent to the switching unit 9, which is part of the switch 7. Through the modulator 5, the prepared command is transmitted, which has in its information part the code word of the PSP-1 sequence to be transmitted to all controlled objects to initialize the generator 22 PSP-2. The generators 22 PSP-2 of all monitored objects 15, as well as the generator 6 PSP-2 of the control unit 1, have identical algorithms for generating a pseudo-random sequence. In normal operation, the codogram block 3 of the next clock cycle operates in broadcast mode, transmitting a command for polling objects to all controlled objects with a certain frequency. The codeword prepared by the PSP-1 generator 4 initiates the PSP-2 generator 6 to generate the next codeword of the PSP-2 sequence, which is recorded in the memory 10 of the PSP-2 generator value of the control unit located in the comparison unit 8. The command generated in the codogram block of the next clock cycle 3 through the switching block 9, the communication line 14, the matching device 20, which ensures the synchronization of the transmission and reception, and the demodulator 18 is fed to the memory block 19, from where it is sent to the comparison block 17. The code word stored in the memory unit 16 of the next clock cycle arrives at the same block (for example, a zero n-bit binary sequence). In block 17, the codogram from the control block 1 is compared with the code word from block 16. In the case of a mismatch from the comparison block 17, the “initialization” command is sent to the PSP-2 generator 22, by which the PSP-2 generator 22 prepares a new pseudo-random sequence on based on the code word that came from generator 4 ПСП-1, otherwise block 17 concludes that the next command for polling objects has arrived. In the latter case, the “object polling” command arrives at the PSP-2 generator 22 from the comparison unit 17, according to which the previously initialized PSP-2 generator 22 generates the next word of the pseudo-random sequence. Using the modulator 21 and the matching device 20 through the communication line 14, the code word is returned to the switching unit 9 and recorded in the memory 12 values of the generator PSP-2 of the controlled objects corresponding to the serial number of the controlled object of the comparison unit 8. Memory 10 values of the generator PSP-2 of the control unit 2 and memory 12 values of the generator PSP-2 of the monitored objects convert the serial binary combinations received at their inputs into parallel n-bit ones and each bit from memory 10 of the value of the generator PSP-2 of the control unit and with memory 12 the values of the PSP-2 generator of controlled objects are supplied to block 11 of logical operations XOR (“exclusive OR”). At the output of block 11, either the value “0” (comparison is true) or the value “1” (comparison error) may appear. The comparison result is sent to the unit 13 monitoring the health of the object, which transmits to the control unit 2 the number of the object and the code of the result of the comparison. If data on their normal operation has been received from all controlled objects, then control unit 2 gives a command to block 3 of generating a codogram of the next survey of objects and to generator 6 PSP-2 to generate the next value. If one of the monitored objects does not respond or the value “1” (comparison error) arrives at the unit 13 for monitoring the health of the object (in this case), the control unit 2 puts the codogram formation unit 3 of the next measure into an individual operating mode. An individual mode of operation consists in forming a command for interrogating an erroneously responding object containing the address of this object and a code word prepared by generator 4 of PSP-1, and transmitting it to this object. In addition, in the individual operating mode, the code word prepared by the generator 4 PSP-1 is fed to the generator 6 PSP-2, which forces him to prepare a new sequence and transfer its first value to the memory 10 of the generator value PSP-2 control unit. In case of repeated erroneous response from the monitored object, an alarm is triggered. After that, the control unit 2 repeats its actions that occur after the start command arrives at it.

The invention in comparison with the prototype and other known technical solutions has the following advantages:

- increasing the level of security alarm simulation with simultaneous monitoring of all protected objects;

- the ability to speed up the process of polling connected objects and detecting the fact of substitution of the object.

Claims (1)

The security device of the group of monitored objects consists of a control unit containing a control unit, a next-step codogram generation unit, a first pseudo-random sequence generator (PSP-1 generator), a modulator block, a second pseudo-random sequence generator (PSP-2 generator), a switch containing a switching unit with N communication lines, N comparison blocks according to the number of monitored objects, each of which consists of a storage device of the generator value PSP-2 of the control unit (memory generator PSP-2 ator of the control unit), XOR logical operations block (logical operation “exclusive OR”), consisting of n XOR blocks, by the number of bits in the binary representation of the codograms of the first and second pseudorandom sequences, the memory device of the PSP-2 generator value of the controlled objects ( The memory value of the generator PSP-2 of controlled objects), the unit for monitoring the health of the object and the controlled object, consisting of a memory block of the next clock cycle, a comparison block, a demodulator, a memory block, a matching device, mod generator, PSP-2 generator, the first output of the control unit included in the control unit connected to the first input of the codogram formation unit of the next clock cycle, the second output of the control unit connected to the first control input of the switching unit included in the switch, the third output of the control unit connected to the first input of the PSP-2 generator, the fourth output is connected to the input of the PSP-1 generator, the output of the codogram formation unit of the next clock is connected to the first input of the modulator, the first output of the PSP-1 generator is it is connected to the second input of the codogram forming unit of the next clock cycle, the second output of the PSP-1 generator is connected to the first input of the PSP-2 generator, the modulator output is connected to the second input of the switching block included in the switch, the output of the PSP-2 generator is connected to the first input of the value memory the generator ПСП-2 of the control unit for each of the N comparison blocks included in the switch, the first input-output of the switching unit included in the switch is connected via a communication line to the input-output of the matching device included as part of the first controlled object, the information output of the switching unit is connected to the first memory input of the PSP-2 generator value of the controlled objects of each of the N comparison blocks included in the switch, N memory outputs of the PSP-2 generator of the control unit and N memory outputs of the PSP generator -2 controlled objects, each of the N comparison blocks included in the switch, are connected to the N inputs of the logical operation block XOR of each of the N comparison blocks included in the switch, the output of the logical opera block XOR of each of the N comparison blocks included in the switch is connected to the input of the health monitoring unit of the object, each of the N comparison blocks included in the switch, the output of the health monitoring unit of the object, each of the N comparison blocks included in the switch is connected to the first input of the control unit, the input-output of the switching unit included in the switch is connected via a communication line to the input-output of the matching device, which is part of the controlled object, the first output of the matching device connected to the first input of the demodulator, the output of the demodulator is connected to the input of the memory block, the output of the memory block is connected to the second input of the comparison block, the output of the memory block of the next clock is connected to the first input of the comparison block, the output of the comparison block is connected to the input of the PSP-2 generator, the output of the PSP generator -2 is connected to the input of the modulator, the output of the modulator is connected to the first input of the matching device.

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