SU1698902A1 - Adapter for receiving information from distributed objects - Google Patents

Abstract

This invention relates to telemechanics. The purpose of the invention is to improve noise immunity and speed and simplify the device. The device contains a clock pulse generator 1, a pulse distributor 2, a switch 3, decoders 4,5,11, groups of elements AND 6P, display elements 7c-7p, counters 8, 9, unit 10 of comparison, element OR 12, delay element 13, element And 14, the memory element 22 and in each information channel the linear unit 16, the receiving and controlling unit 17, the elements 18-20 and the memory unit 21. 1 il.

Description

The invention relates to telemechanics and can be used in automated process control systems, data transmission equipment.

Systems and devices are known for receiving information about the state of remote distributed objects at a central control tower.

However, in an unoriginal device, either alternate reception of information from objects by one common receiving equipment is carried out, or an individual receiving device is placed on each object (communication channel), which ensures continuous information collection. The first method is simple to implement, but with a large number of objects with a rapidly varying connection it does not provide a high reliability of the state of objects in

real scale of the crown. The second method has opposite properties and is characterized by a much lower equipment utilization (loading) ratio.

Closest to the proposed is an adaptive device for receiving information from distributed objects, containing common equipment and m identical information channels. Each information channel includes a linear unit (modem), the output of which is connected to the first input of the account and the second entrance of the receiving and control unit, the output of which is connected to the first input of the timer, the output of which is connected to the second input of the counter. Vyhpts counter connect. The first entrance of the tribe OR, the output of which is connected by the first input of the memory block. First group of outputs

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the memory unit is connected to the group of inputs of the first element I, the second group of outputs of the memory unit is connected to the group of inputs of the second element I. The second input of the memory unit is connected to the output of the third element I, the second input of the timer and the third input of the counter. The second input of the OR element is connected to the output of the fourth element I. The common equipment includes a clock pulse generator, the output of which is connected to the input of the pulse distributor and the first input of the second counter. Each of the outputs of the pulse distributor is connected in the same information channel with the first inputs of the receiving and monitoring unit, the first and fourth elements AND and the second input of the third element I. The device switch has n information inputs, which are channel inputs of the device from objects, and m information outputs which are connected to the inputs of linear blocks of the same name information channels (t n), the same outputs of the receiving and control blocks of all information channels are combined and connected to the inputs of ne The decoder, the output of which is connected to the combined second inputs of the fourth elements AND of all information channels. The group of outputs of the first decoder is connected to the combined corresponding inputs of the input groups of each element AND group, the outputs of which are connected to the corresponding inputs of the same display elements. The same outputs of the first elements AND of all information channels are combined and connected to the same inputs of the second decoder and the inputs of the second group of the comparison unit, the inputs of the first group of which are connected to the same outputs of the first counter, the inputs of the third decoder and the combined inputs of the memory blocks of all information channels. The outputs of the second elements AND of all information channels are connected to the corresponding inputs of the first element OR, the output of which is connected to the first input of the first element I, the output of which is connected to the input of the first counter. The output of the comparison unit is connected to the second input of the second OR element, the output of which is connected.

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with the second input of the second counter and through the delay element with the second input of the first element I. The second input of the second element OR is connected to the combined first inputs of the third elements AND of all information channels and the output of the second element AND, the first input of which is connected to the first input of the second counter. The second input of the second element And is connected to the output of the second decoder, each output of the group of which is connected to the input of the same name element And group. The third input of the second element And is connected to the output of the fourth decoder, the inputs of which are connected to the corresponding outputs of the second counter. The outputs of the third decoder are connected to the corresponding first control inputs of the switch, each of the second control inputs of which is connected to the output of the third element And of the corresponding information channel.

The device receives sporadic (when an object state changes) information from communication channels about the state ti of remote objects. The process of receiving information from objects in the device is divided into three stages: connecting communication channels to free information channels, analyzing the availability of information on communication channels, and receiving and processing information. The first stage is mainly provided by the first counter and the comparison unit. The capacity of the first counter is equal to the number of channels n. The frequency of the clock generator in the comparison unit compares the number of channels of communication channels recorded in the memory of information channels, with the state of the first counter corresponding to the number of the communication channel, the queue before which reached. If the codes did not coincide during the hectare of the clock pulses, the next decoder connected to the outputs of the second counter will produce the output signals with each clock in the next series of m clock pulses. These signals are permissive for recording the number of the communication channel in the memory block of the first detected free information channel by the value of the output of the second decoder - the second element And 51698902

The element of the information channel is a memory block. Analysis of the connected channel for the presence of information in it is carried out by counting the number of received informational pulses in a fixed belt interval T0, specified by the timers in the information channels.

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The value of To is chosen, out of the statistical characteristics of the coded information, so that the number of fronts, if there is information in the communication channel during the time interval Tp, is not less than a certain threshold R (the absence of information is accompanied by the presence of only one signal in the communication channels Polarities: 1 or O, the appearance of information is associated with alternation 1 and O). The timer is a binary counter

N - T0 / tK,

where t is the duration of one code

, combinations,

If during the time rfo the number of detected edges is less than R, then the communication channel is disconnected from the information channel and the latter becomes ready for connection to another communication channel. Otherwise, the reception and processing of information from the object continues. After receiving the information from the receiving object 10

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clock generator, the output of which is connected to the first input of the first counter and to the input of the pulse distributor, each of whose outputs is connected in the same information channel to the first inputs of the first, second and third elements And the receiving and control unit, the second input of which is connected to the output the linear block of the information roll, the output of the first element I is connected to the first input of the memory block of the information channel, the output group of which is connected to the group of inputs of the third element I, the switch, info The data inputs of which are the device inputs, and the information outputs of which are connected to the inputs of linear blocks of the same information channels, the same names of the receive and control blocks of all information channels are connected and connected to the inputs of the first decoder, the output of which is connected to - Loose elements II of all information channels, the outputs of the group of the first decoder are connected to the combined corresponding inputs of the group of each element and the group, the RODS of which are connected Unused with the corresponding inputs of the same display elements, the same output of the third element And all the information channels

When the end combination code is combined, 35 are combined and connected by the same name.

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clock generator, output. which is connected to the first input of the first counter and to the input of the pulse distributor, each of the outputs of which are connected in the same information channel with the first inputs of the first, second and third elements And and the receiving and control unit, the second input of which is connected to the output of the linear unit of information, the output the first element And is connected to the first input of the memory channel of the information channel, the group of outputs of which is connected to the group of inputs of the third element And, the switch, the information inputs of which are by device moves, and the information outputs of which are connected to the inputs of linear blocks of the same information channels, the same outputs of the receiving and control blocks of all information, the channels are combined and connected to the inputs of the first decoder, the output of which is connected to the combined second inputs of the second channels, the outputs of the group of the first decoder are connected to the combined corresponding inputs of the group of each element And the group, the RODS of which are connected to the corresponding inputs of one element name display, the same name vyhog.y third AND chseh informatsionny- channels

5 are combined and connected by the same

nor is the data channel released to receive signals from other objects.

The disadvantages of the device are insufficient noise immunity and speed, as well as hardware redundancy. In the presence of interference in communication channels, for example, the type of fragmentation, there may be cases of false ascertainment of the availability of information in communication channels and unproductive use of information channels. The same is accompanied by a fixed time interval for the analysis of T ,,, during which the information channel, as a minimum, can be idle in the absence of information in the communication channel.

The purpose of the invention is to increase the

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the inputs of the second to l7 pp. 1 of the ora and the entrances of the first unit of the bpsha comparison, the entrances of the rpysirtH which are connected to one of the B4X3i; i SECOND

the counter, the input v i -th decoder, and the 1-Mil ъ s are combined: groups of block inputs to all channels of information channels, the output of the comparison block is connected to the first input of the OR element, the output of which is connected to the input of the delay element, and the second input - with combined -; the second inputs of the first elements AND of all information channels and the output of the element I, the first pass of which is connected to the output of the second decoder, each output of the group of which is connected to the input of the element of the same name And group, the outputs of the third depressor

resistance and speed and up-55 are connected with eoteletvukshpng-n first

grove device.

The goal is achieved by the fact that P is a device containing

the inputs of the second to l7 pp. 1 of the ora and the entrances of the first unit of the bpsha comparison, the entrances of the rpysirtH which are connected to one of the B4X3i; i SECOND

counter, input v i -th decoder and integrated 1-Mil ъ s.: groups of block inputs tg of all information channels, the output of the comparison block is connected to the first input of the OR element, the output of which is connected to the input of the delay element, and the second input is with combined -; the second inputs of the first elements AND of all information channels and the output of the element I, the first pass of which is connected to the output of the second decoder, each output of the group of which is connected to the input of the element of the same name And group, the outputs of the third depressor

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the control inputs of the switch, each of the second control inputs of which are connected to vyho, nch-: nepsof-o

element I of the corresponding information channel, a memory element is entered, the output of the delay element is connected to the second input of the first counter, the input of the second counter and the first input of the memory element, the second input of which is connected to the output of the first counter, the output of the memory element is connected to the second input of the element And, the output of the second element And in each information channel is connected to the second input of the memory block.

The drawing shows the functional diagram of the device.

The information receiver from the distributed objects contains a generator of 1 clock pulses, a distributor 2 pulses, switch 3, first 4 and second 5 decoders, a group of elements AND, display elements, first 8 and second 9 counters, comparison unit 10, third decryptor 11 , element OR 12, element 13 of delay, element AND 14, information channels 15, (- 15 tons, each of which contains a linear block 16, a block 17 of reception and control, the first 18 second 19 and third 20 And elements and a memory block 21 tee and memory element 22

The device works as follows.

From the communication channels, the information inputs of the switch 3 intermittently receive information on the state n of the remote distributed objects. In the absence of information (changes in the state of objects) in each communication channel, the service code combination is constantly transmitted from the objects. If there are changes in the state of the objects, the transfer of the quiescent pattern is stopped and informational code combinations are transmitted cyclically. The switch 3 carries the connected communication channels to the receiving information channels, a device whose number is less than the number of communication channels (). The work of information channels is provided by m sequences of clock pulses shifted one after the other with respect to the other, which are formed by the distributor 2 pulses from the reference clock sequence of the clock pulse generator 1 with a period of Ј (,.

The process of receiving information from an object in the device is divided into three

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stages: search for a communication channel that is not connected to the receiving equipment of the device, connecting the communication channel to a free information channel, the actual reception and processing of information.

The main unit, which ensures operation of the device at the first and partially at the second stages, is counter 9, whose capacity M is equal to the number of communication channels in the system and, and the number of stages

K (+ 1),

where j ° 8anJ is the part of the logarithm.

Each state of the counter 9 corresponds to the binary code of the communication channel number.

Let counter 9 take the state corresponding to the number of the 1st communication channel (1 Јr i Ј n). The code of the number of the 1st channel from the output of the counter 9 with each clock of the generator 1 is compared in block 10 of comparison with the code values of the numbers already connected to the information channels of communication channels stored in their memory blocks 21. A full comparison cycle occurs during the time m of generator 1 pulses, during which the memory blocks of all information channels are polled. The codes of the numbers of the connected communication channels are received through the third AND elements. 20 to the first group of inputs of the comparison unit 10. The same outputs of the elements And 20 of all information channels are combined; collectively, the outputs of elements 20 form a K-bit common bus. Simultaneously with the beginning of the cycle of comparing the codes of the number of communication channels, the counting of the number of pulses of the generator 1 by the counter 8, having a capacity equal to t, begins.

If during time t блок0 the comparison unit 10 detects the coincidence of the number codes of the i-th communication channel, then a pulse is generated at the output of unit 10, which through the OR 12 element and the delay element 13 resets (sets) the counter 8 and the memory element 22 to the initial zero state and translates counter 9 into the state corresponding to the (i + 1) -ro number of the communication channel. A new comparison cycle begins in block 10.

If in none of the m pulses of the generator 1, the block 10 has recorded a match of the channel numbers, i.e. it is established that the i-th communication channel is not connected to any information channel, then the counter 8 generates a signal that brings the memory element 22 to state 1. The search for the free information channel 15 starts. The signal from the output of the element 22 It is sent to one of the inputs of elements AND 14, to the other input of which the output of the second decoder 5 is connected. At this output of decoder 5, signals appear only when zero code combinations arrive at its input from memory blocks 21 of information channels. When the first signal appears at the output of the decoder 5, element And 14 generates a pulse, which is selected in the corresponding element And 18 of information channels by coinciding with the pulse of the distributor 2. The pulse from the output of element 18 enables from the output of counter 9 to memory block 21, the same pulse arrives at the corresponding control input of the switch 3. At the other control input of the last one, corresponding to the measure of the selected communication channel, the signal from the third encoder 11, which is formed as a result of decoding the counter 9. The simultaneous action of the signals on the two control inputs of the switch 3 connects the 1st communication channel to the selected free information channel. At the same time, the pulse from the output of the element 14 through the element OR 12 enters the input element 13 of the delay. In turn, the delay time Ј0 element 13 generates a pulse, which resets counter 8 and memory element 22 to the initial zero state and converts counter 9 to the state corresponding to (it-0th communication channel. A new determination cycle is started on 1 + 1) -th communication channel to the device or not, etc.

If all information channels on the 15th, 15th are occupied by receiving and processing information from objects, then the state of the counter 9 and the memory block 22 remains unchanged until

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any information channel is released.

The third stage - the actual reception and processing of information from the object - begins immediately after connecting the communication channel to the information channel 15 (-15m. Each line unit 16 interfaces the information channel with the duplex communication channel and performs signal conversion, demodulation (reception) and modulation (transmission).

The demodulated code dressings are sent from block 16 to block 17 of the IT control, as well as to the internal modulator of its own linear block, from which they are sent via the reverse link to the object (information feedback). In block 17, code dressings are regenerated, clock and cycle phasing is performed and the code combinations are checked for consistency with the error-correcting code. With each correct reception, the code cobminations of the primary code are read in parallel code with, the working cycles of the information channel to the inputs of the decoder 4. Since the working cycles of all information channels are separated in phase, the groups of outputs of blocks 17 of all information channels are combined into a common bus.

If a rest code combination is received from the communication channel, the result of its decryption (impulse) is immediately fed to the input of the second element And 19 of the information channel, where it is selected with its tact from the distributor 2 and deletes the code number. communication channel in memory block 21. This means that this information channel is free and ready to connect another communication channel.

When receiving code combinations containing information on the state of the object, decoder 4 outputs the results of decoding via the corresponding AND group to the display element by sending a permission signal to the input element And n from one of the outputs of the second decoder 5. This is ensured by the fact that the inputs of the decoder 5 at a given time are connected via the element 20 to the outputs of the corresponding memory block 21 in which the code of the communication channel is stored

(object), and the result of decryption from the decoder 5 enters the fp- element.

At the end of the passage and processing of all informational code combinations, the service rest is received from the object again. From the output of the decoder 4, the result of its decryption after selection in the corresponding element I 19 erases the number of the connected channel in memory block 21, which means that the corresponding information channel is ready, to receive information from other objects.

Compared with the prototype of the proposed device is simpler and has a higher noise immunity and speed. Instead of m timers, m counters, m elements OR, m elements AND, element OR, element AND and the decoder, only one new memory element (memory trigger) is entered into the device. Higher noise immunity is due to the replacement of the method of analyzing the availability of information in the communication channel by the number of reversals for a fixed interval

time t0 on the informational signs of the code combo & inations. At the same time, the time during which the absence of information from the object is analyzed in the information channel 1 is reduced compared to the prototype in

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This AND, the third decoder, the outputs of which are connected to the first control inputs of the switch, the comparison unit whose output is connected to the first input of the OR element, the output of which is connected to the input of the delay element, in the counter and in each information channel the linear block, output The first and the third elements are AND, and the memory blocks, the outputs are connected to the first inputs of the third AND element, the output of the first AND element is connected to the first input of the memory block and the corresponding second control unit. go in ohm switch, each of the outputs of which are connected to the input of a linear block of the corresponding information channel, the same outputs of the receiving and monitoring blocks of information channels are combined and connected to the corresponding inputs of the first decoder, the output of which is connected to the first input of the second element tfa And each information channel output element And is connected to the second input of the OR element and the combined first inputs of the first elements AND information channels, each of the outputs of the pulse distributor from dinen with combined said second input unit and receiving the control and the first - and third elements suitable traffic channel of the same name

1-N times, where N TF / t (tK is the extender — the outputs of the third elements and the information of one code combination).

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channels are combined and connected to the corresponding inputs of the second decoder and the corresponding first inputs of the comparator unit, the outputs of the second counter are connected to the corresponding inputs of the third decoder, the second inputs of the comparator unit and the second inputs of the memory block of each information channel, characterized in that in order to simplify and improve the speed and noise immunity of the device, a memory element is inserted into the neg, the output of which is connected to the second input of the AND element, the output of the delay element is connected to the input of the V cerned counter, a first input of the memory element and the second input of the first counter, the output of which union of soybeans with a second input of the memory element - ti and each traffic channel output of the second AND element is connected to the third input of the memory unit.

An adaptive device for receiving information from dispersed objects, containing a clock pulse generator, the output of which is connected to the input of the pulse distributor and the first input of the first counter, the switch whose information inputs are device inputs, the first decoder, the outputs of the output group of which are connected to the same inputs of the group of inputs of all elements AND groups, the outputs of which are connected to the corresponding inputs of the corresponding display elements, the second decoder, the outputs of the group of outputs first connected to the second inputs of the elements of the same name and group, the output from the first input of the elements

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This AND, the third decoder, the outputs of which are connected to the first control inputs of the switch, the comparison unit, the output of which is connected to the first input of the OR element, the output of which is connected to the input of the delay element, the second counter and in each information channel the linear block whose output is connected to the first input of the receiving and control unit, the first is the third And elements and the memory block, the outputs of which are connected to the first inputs of the third element And, the output of the first element 4 and I is connected to the first input of the memory block and the corresponding second the control input of the switch, each of whose outputs is connected to the input of the linear block of the corresponding information channel, the same outputs of the receiving and control blocks of the information channels are combined and connected to the corresponding inputs of the first decoder, the output of which is connected to the first input of the second element of each information channel , the output element And is connected to the second input element OR and the combined first inputs of the first elements AND information channels, each of the outputs of the distributor impulses It is connected to the combined second inputs of the receiving and controlling unit and the first to third elements of the corresponding information channel, the same

outputs of the third elements And information outputs of the third elements AND information

The channels are combined and connected to the corresponding inputs of the second decoder and the corresponding first inputs of the comparison unit, the outputs of the second counter are connected to the corresponding inputs of the third decoder, the second inputs of the comparison unit and the second inputs of the memory block of each information channel, in order to simplify and increase the speed and noise immunity of the device, a memory element is inserted into it, the output of which is connected to the second input of the AND element, the output of the delay element is connected to the input the second counter, the first memory element and the second input of the first counter, the output of which is connected to the second input of the memory element, and in each information channel, the output of the second element I is connected to the third input of the memory block.

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Claims (1)

^ Claims ί 40 An adaptive device for receiving information from dispersed objects, containing a clock pulse generator, the output of which is connected to the input of the pulse distributor and the first input of the first counter ₍ switch, the information inputs of which are the device inputs, the first decoder, the outputs of which group of outputs are connected to the same the inputs of the group of inputs of all elements AND the groups whose outputs are connected to the inputs of the same display elements of the same name / second decoder, the outputs of the group of outputs of which They are connected to the second inputs of the same elements AND groups, the output is to the first input of the 10-element Eden element OR, the output of which is a linear block, the output of which is connected to the first input of the AND block, and the third decoder whose outputs are connected to the first control inputs of the switch , a comparison unit, the output of which is connected to the first input with the input of the delay element, a pry counter, and in each information circuit and control elements And and the block ge are connected to the first element And, And is connected to the first input of the memory block and corresponds by the second control input of the switch, each IR of the outputs of which is connected to the input of the linear block of the corresponding information channel, the outputs of the same blocks of the reception and control of information channels are combined and connected to the corresponding inputs of the perioro decoder, the output of which is connected to the first input of the second element And of each information channel, the output of the AND element is connected to the second input of the OR element and the combined first inputs of the first elements AND information channels, each of the outputs of the distributor imp LSS is connected to the combined second inputs of the reception and control unit and the first ^ third elements AND the corresponding information channel, the outputs of the third elements and information channels of the same name are combined and connected to the corresponding inputs of the second decoder and the corresponding first 'inputs of the comparison unit of the counter using the connecting inputs of the third, the second inputs of the block; the second inputs of the block: an information channel, in order to increase the speed and noise immunity of the device, an element NT memory, the output of which is connected to the second input of the element And, the output of the delay element is connected to the input of the second counter, the first input of the memory element and the second input of the first counter, the output of which is connected to the second input of the memory element, and in each information channel the output of the second element And is connected , with the third input of the memory block. the first is the Third flash memory, the outputs of which are the first inputs of the third output of the first element *!, the outputs of the second correspond to a decryptor, comparisons and memories of each ι, with respect to: