SU1161981A1 - Telemetric system - Google Patents

Abstract

A TELE-MEASURING SYSTEM containing a matrix converter, the inputs of which are inputs, the first outputs are connected to the inputs of the first group of communication channels, the second group of communication channels, the outputs of which are connected to the inputs of the adders of the first group, with the aim of because of the accuracy of the system, the second group of adders, the first and second switches, the first, second and third pulse counters, a permanently stored device, a clock generator, an AND element, a decoder, a reference element, are entered into it Information channels, each of which contains a switch and integrator connected in series, the inputs of the communication channels of the second group are connected to the corresponding outputs of the first group of the matrix converter, the outputs of the communication channels of the first group are connected to the inputs of the adders of the second group, the outputs of the adders are connected to the corresponding information inputs of the information switches channels, the integrator outputs of the information channels are the outputs of the system and are connected to the corresponding inverse inputs. and adders, the outputs of the information channel switches are connected to the corresponding information inputs of the first switch, the output of which is connected to the output input of the comparison element, the second input of which is the system input, the output of the comparison element connected to the inputs Reset of the first and second counters, with the first control input clock generator and through the third account:) Chick with the inputs of the permanent storage device, the outputs of which are connected to the corresponding information inputs the second switch, the output of which is connected to the first input of the And element, the outputs of the first pulse counter are connected to the corresponding control inputs of the second switch and information channel switches, the output of the clock generator is connected to the input of the first pulse counter and the BTopbiM input of the And element whose output is connected with the input of the second pulse counter, the outputs of which are connected to the corresponding inputs

Description

decipher, decoder outputs co-; The first inputs of the first switchboard are connected with the synchronous inputs corresponding to one of the outputs of the decoder connecting the informational switches, with the second control input of the generals and with the corresponding clock controllers.

116t98t

The invention relates to information measuring equipment and can be used in telemetry, remote communications, and telecontrol.

A telemetric system known to transmit messages over unreliable communication channels by using parallel channels and consisting of a serially connected group device of parallel communication channels and another group DJ device

The disadvantage of this system is a large number of channels.

Closest to the proposed is a telemetering system containing in each of the n measuring channels a serially connected communication channel, an adder, as well as a first matrix converter, an additional one. (t + 1) communication channels and serially connected 2nd matrix converter, determinant calculation unit and 3rd matrix converter, the outputs of which are connected to other inputs of adders, and the outputs of the latter are connected to the system outputs. In addition, the outputs of the 2nd matrix converter are connected to other inputs of the 3rd matrix converter, and the inputs to the outputs of the main and additional communication channels, the inputs of the 1st matrix converter are connected to the system input, and the outputs to the inputs of additional channels zi 2J

The disadvantage of this system is low accuracy. This is due, firstly, to the insufficiency (t + 1) of the reserve channels for the complete elimination of failures in the m channels, second, an increase in the error in determining the values of failures with an increase in the number of communication channels n, due to the influence of normal channels in each channel (for example, shum

quantization in digital systems, apparatus error, etc.).

The purpose of the invention is to increase accuracy.

This goal is achieved by the fact that in a telemetering system containing a matrix converter whose inputs are system inputs, the first codes are connected to the inputs of the first group of communication channels, the second group of communication channels, the outputs of which are connected to the inputs of the adders of the first group, are entered into the second group of adders , first and second switches, first, second and third pulse counters, read-only memory, clock generator, AND element, decoder ,. Comparison element, information channels, each of which contains a switch and an integrator connected in series, the inputs of the communication channels of the second group are connected to the corresponding outputs of the first group of the matrix converter, the outputs of the communication channels of the first group are connected to the inputs of the adders of the second group, -TACHINGS of the adders are connected to corresponding to the information inputs of information channel switches The outputs of the information channel integrators are system outputs and are connected to the corresponding inverters the common inputs of the adders, the outputs of the information channel switches are connected to the corresponding information inputs of the first switch, the output of which is connected to the first input of the comparison element, the second input of which is the master input of the system, the output of the comparison element is connected to the inputs Reset the first and second counters control of the clock pulse generator input and through the third counter with the inputs of a permanent jamming device whose outputs are connected to the corresponding information inputs The second kotovatator 4, whose output is connected to the first input of the element I, the outputs of the first pulse counter is connected to the corresponding control inputs of the second switch and information channel switches, the output of the clock generator connects to the second input of the pulse counter and the second input of the element And, the output of which is connected to (the input of the second pulse counter, the outputs of which are connected to corresponding corresponding inputs of the decoder, the output M of the decoder is connected to the synchronous switch information channels and sootvetstvukntsimi by control inputs to per- Vågå | F utatora, one of the decoder outputs is connected to a second input yn .ravl vschim taktovk pulse generator. Due to this, a transition occurs to a rough representation of the transit signals (n + 2m) -intermediate signals (where m is the maximum number of non-faultable channels), which are transformed in the receiving subsystem in such a way that among them there are n defect-free signals, which using a tunable inverse matrix, telemetric signals are restored. The drawing shows a structural diagram of a telemetering system. The system contains a matrix generator 1, (n + 2m) communication channels 2, () adders 3; informational quotations 4, consisting of comg mutators 5 and integrators 6, permanent memory 7; third pulse counter 8, element 9 comparisons second switch 10, first 11 pulses generator 12 clock pulses, AND element IS second counter 14 pulses decoder 15 and the first switch 16. Matrix converter 1 converts n input signals x (t) into (n + 2in) intermediate signals y (t) in accordance with the operation of multiplying the n-component vector by a rectangular matrix A of dimension (n + 2in ) .n: TCt) A. (t) Matrix A has the following properties: normalization of rows (for example, normalization of dispersion, the sum of the squares of the elements is equal to one), which is necessary to keep the output matrix 1 of the same dynamic range as the input signals; any n rows form the matrix A |, with a nonzero determinant, therefore such a matrix has an inverse matrix. The matrix A is constructed as follows. As a source, a square (php) matrix with a non-zero determinant and normalized rows is used, for example, the unit matrix 00 ... 1 is next (n + 1) and the row must contain such elements a .. n-and all matrices times) P41 , dimensions (pxp), which can be composed of (n + 1) -th row and any (n-1) previous ones, had a non-zero determinant. This leads to n conditions that, after simplifying the determinants of T7, have the form, - O, i 1, p. Values a are chosen taking into account normalization, for example: a -, i 1, p. The elements of all of the following lines are defined in the same way. The implementation of the matrix converter 1 is possible on the basis of (n + 2m) sum # 1 direct-subtractive. Communication channels 2 are designed to transmit input signals over a distance and can be implemented on the basis of a wired communication line, a radio link, etc. Adders 3 have n + 1 inputs, the weights of which correspond to each of (n + 2m) rows of matrix A, so that the output of adders 3 forms the difference L yj -S: where X, i 1, n are the output signals of the telemetering system. Blocks 3 are implemented on the basis of summing-subtractive circuits. 5 Switches 5 information channels are designed to transmit one of the (n + 2m) input signals to the output; The number of the connected signal is determined by the code at the control inputs, this code is memorized, when signal 1 appears at the control input (on the leading edge of the pulse), Blocks 1 are known as integrated circuits. Integrators 6 are designed to integrate the input voltage with as fast as possible. The first switch 16 is designed to transmit one of the p input to the output signals in accordance with the logical unit on one of the n control inputs. The switch 16. consists of n measuring keys with combined outputs, the Permanent memory device 7 is designed to memorize all possible (n + 2in) bit code combinations containing (n + m) units and is a memory block in C, n + 2fti bit code combinations. Each combination is formed at the outputs of block 7 when the corresponding address combination appears at its inputs. Pulse counters 8, 11 and 14 are designed to form an output code combination corresponding to the number of impulses arriving at the input. The number of possible states for counters 8, 11, and 14 is C 1, (n + 2m), and n, respectively. Counter LI and 14, in addition, can be reset to the zero state under the action of logical 1 at the installation input. Comparison element 9 generates a signal 1 at the output if the voltage module at the first input of the switch 16 exceeds the constant setting voltage The second input, in the opposite case, at the output of circuit 9 there is a signal O, the setting level, which determines the minimum level detected with combat, i.e. the accuracy of the control depends on the normal error of the system and the permissible probability of a false failure of the channel Rd channels, maxis 2: LK (1, where b is the standard deviation of the normal errors in the communication channels of 2, and K is determined from the following equality: 1 j Switch 10 connects to the output one of the input logic signals in accordance with the code on the control inputs.Generator 12 generates at its output a sequence of pulses with a frequency fj or fJ depending on which of the two control inputs has a pulse 1, Frequency f. () is achieved by the speed of blocks 4, 6, and 9 with the passage of information pulses, and the frequency fj is determined by the speed of blocks 4,11, 13, 14, 15. with the passage of logical signals.Thanks to the presence of two different frequencies, the speed of the system is improved. a time base generator and an RS trigger that controls the time by a time generator circuit or a division factor in the frequency divider at the output of the master oscillator. The decoder 15 is designed to form at one of its outputs a logical unit in accordance with the code combination at the inputs. The proposed telemeasurement works as follows. Telemetry signals x; (t), i 1, n are converted in block 1 into intermediate signals y (t), j 1, using matrix A, any n rows of which have an inverse matrix. The intermediate signals y1 (t) are transmitted via the corresponding Tn + 2m) communication channels 2 r among which there can be no more than m faulty channels. By a faulty channel is meant channel 2, the error of which is influenced by noise, aging, radiation, failure of the element, etc. exceeds a certain level. In the receiving subsystem, the signals y (t) yj (t) (t), where j (t) is the error of channel 2, are fed to the inputs of the corresponding adders 3, at the outputs of which the differences f n 1 Vi are formed - as additional inverse inputs of adders 3 are given output signals of the system x (t), i 1, p. From (n + 2m) 7 output signals, the adder Cp signals passes through n switch 5 to inputs n of integrators 6., as a result of which o. A p-input and p-output automatic control system with matrix feedback is formed, with the strings m Atrits of feedback corresponds to the rows of the matrix A for those n signals y | whose numbers are chosen for connection in the switches 5. Since any n rows of the matrix A have an inverse matrix, then the outputs of the integrators 6 form estimates of the telemetry signals x (t), which follows from the equality - 1 f - «H. „-An Y X + A .. lk-V (.. Where AJ, -X is a matrix composed of n rows of the matrix A,. Is an error vector in n CS2. To check the health of selected (in this transmission cycle) to restore channels 2 under The action of the generator pulses 12, which follow at a reduced speed fj, replaces part of the signals in the following way. At the output of block 7, there are (n + 2x) logical units, which corresponds to (n + m) channels 2, which are considered good. are good, then for any n of them it is possible to restore the signals x, and when replacing any sig ala y, the backup yi one ns of the signals x (t) n will change more than the predetermined calculated value determined by the level of normal bore channels 2, under the action of the generator pulses 12 the counter 11 changes its state and at the output switch 10 comes with a logical signal O shsh 1 in accordance with the number of the symbol in the code combination at the output of the memory device 7, as soon as the next unit rjp.oft goes to the output of switch 10, along with the pulse and at the output of the elements And as a result what sc The switch 14 changes its state and, under the action of a pulse at the output of the depotfrarator 15, the address of the backup channel 2 is set in the corresponding switch 5. The transition process 1 affects all signals x (t), but the maximum jump amplitude is in the signal x (t) corresponding to switch 5 with the changed address. It is this address that is located at the input of the switch 16, therefore the amplitude of the transient process at the output of the switches 5 and 16 in the comparison element 9 will be compared with the allowable setpoint. If there is no transference, control continues. If the comparison element 9 forms a logical unit at its output, then one of the (n + 2m) channels 2 used to restore the signals x (t) failed. The system then goes into the search mode for another set of healthy channels 3. To do this, the state of the counter 8 changes, a new (n + 2m) bit word with (n + m) units, counters 11 and The 14 are zeroed, the generator 12 is transferred to the higher frequency, and the addresses of the first n of the selected channels 2 are entered into all the switches 5. Once this is finished, the nth input code of the decoder 15 will switch the generator 12 to a lower frequency and start the test mode (n + t) channels 2 for compatibility s. If one of the new combinations of n channels 2 of comparison element 9 works again, the search for healthy (n + m) channels 2 continues. Since the number of failures does not exceed m, the search always ends successfully. Consider the effect of the normal component of channel errors on the level of detectable errors. Since the control is based on the replacement of one of the signals Yj (t) with another one, this results in the summation of two normal errors, i.e. doubling the dispersion of normal fissure. Therefore, even for serviceable channels 2, there can be voltage jumps at the input of the comparison circuit 9, the root mean square, the value of these jumps is d e N2. Knowing this, you can set the level, the settings at the second input of circuit 9: L. K-42 DG is determined by the permissible probability of false failures. Thus, the proposed device provides high accuracy;

due to the complete elimination of failures in m channels and the absence of an increase in the dispersion of errors in all channels upon exiting

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Claims (1)

TELEVISION SYSTEM, containing a matrix converter, the inputs of which are the inputs of the system, the first outputs are connected to the inputs of the first group of communication channels, the second group of communication channels, the outputs of which are connected to the inputs of the adders of the first group, which means that, in order to improve the accuracy of the system , it introduced the second group of adders, the first and second switches, the first, second and third pulse counters, a permanent storage device, a clock pulse generator, element: I, decoder, element comparable. the information channels, each of which contains ¹ commutator and integrator connected in series, the inputs of the communication channels of the second group are connected to the corresponding outputs of the first group of the matrix converter, the outputs of the communication channels of the first group are connected to the inputs of the adders of the second group, the outputs of the adders are connected to the corresponding information inputs switches of information channels, outputs of integrators of information channels are the outputs of the system and are connected to the corresponding inverse inputs ummators, the outputs of the switches of information channels are connected to the corresponding information inputs of the first switch, the output of which is connected to the first input of the comparison element, the second input of which is the input of the system, the output of the comparison element is connected to the inputs of the Reset of the first and second counters, with the first control input of the generator clock pulses and through a third counter with inputs of a read-only memory device, the outputs of which are connected to the corresponding information inputs of the second comm Tatorey whose output is connected to a first input AND gate, outputs of the first pulse counter are connected to respective control inputs of the second switch and switches the information channels, the clock pulse generator output is connected to JJW is the input of the first pulse counter and with the second input of the And element, the output of which is connected to the input of the second pulse counter, the outputs of which are connected to the corresponding inputs of the decoder, the outputs of the decoder are connected to the clock inputs of the corresponding switches of the information channels and the corresponding inputs of the first switch, - 'one of the outputs of the decoder is connected - with a second control input of the clock generator. 1 .