SU942104A1 - Device for inquiry of telemetric system channels - Google Patents

Description

one

The invention relates to telemetry and can be used in multichannel telemetry systems with time division channels, in particular in systems with a cyclic mode of polling channels.

Devices for cyclic polling of telemetry system channels are known, consisting of a clock pulse generator (GTI) connected by its output to the input of a binary pulse counter for internal conditions VI, the outputs of said counter are connected to the corresponding inputs of electoral elements forming together with the counter a pulse distributor whose outputs are connected to the control inputs of the channel key elements, the information inputs of the latter are connected to the measuring channels, and the outputs are combined s in the overall yield of the device.

In known devices, the inputs of the electoral elements are connected to the outputs of the binary counter in such a way that the sets of binary variables arriving at these inputs follow in a lexicographical order, i.e., in order of increasing their numbers. For example, one output of the first trigger of a binary counter is connected to one of the inputs of each odd election element, and the other output with one of the inputs of each even election element.

fO One output of the second trigger is connected to one of the inputs of the first, second, fifth, sixth, etc. electoral elements, and the other output of this trigger is connected to one of the inputs of the third, fourth

t5 of the seventh, eighth, etc., electoral elements, etc. f l.

In such devices, the polling rate is the same for all channels. Its value is selected from the requirement to transmit

Claims (7)

20 with a given accuracy of the most rapidly changing message i2J.  Since the rates of change of messages transmitted on different channels may differ from one another several times, 39 for some channels the survey frequencies will be greatly overestimated, which results in a large number of redundant samples at the device output.  To eliminate these disadvantages, t.  In order to reduce the redundancy of transmitted messages, in telemetric systems with cyclic polling mode, an individual polling frequency is assigned to the channel every day, determined by the rate of change and the required accuracy of message recovery transmitted via this channel.  The known devices that implement such a polling mode can also have, as part of their pulse counter, along with double triggers, and ring distributors (RR) with numbers of internal states 3, 4, 5 ,. .  H and 4.  Due to this, it is possible to implement a larger set of different polling frequencies, and consequently, reduce the total number of samples at the output of the device.  Usually, in known devices s and 4, channels with an increased sampling frequency are alternately polled first, then channels with an average sampling frequency, etc., alternately also.  d.  At the same time, the connections of the inputs of the election elements with the outputs of the ring distribution; The shtels (the binary trigger will also be called the ring distributor with the number of internal states 2), as in the known devices 1.1-1, are determined by the lexicographic ordering of sets of binary variables .  Such a construction of the device. In order to interrogate the coughs of the telemetry system, it is permissible only with the sequential start-up of ring distributors in the pulse counter Cz.  In this case, the polling frequencies of different channels may differ from each other only by an integer number, determined by the number of internal states of the ring distributors of the pulse counter involved in generating the polling signals with these frequencies.  In the known device (prototype), polling frequencies F-r / 9 f-j-lbbvi F-j- / f44 are possible, where FT is the frequency of the following clock cycles at the GTI output.  It is known that a more dense grid of different polling frequencies, including frequencies that are not multiple 1x between themselves, and consequently, greater opportunities for reducing the redundancy of transmitted messages, can be obtained with parallel and mixed starting of ring distributors in the pulse counter 5j and. b.  For example, when mixed starting the same ring distributors that are used in the prototype, it is possible in addition to the existing polling frequencies to implement the polling frequencies T-j-Il2 and F. J- / 48 Ji, however, in this case, performing the connections of the inputs of the electoral elements with the outputs of the ring distributors in accordance with the lexicographic order of following a set of binary variables, as in the prototype, can lead to a decrease in the number or impossibility of implementing the channels polled with these additional frequencies interrogation, and therefore to the performance of the device of its functions.  Example.  Let it be required to ensure the interrogation of six channels with the interrogation frequency FOPр - FT / 9, six channels with the interrogation frequency of eight channels with the interrogation frequency, -.  In this case, the device pulse counter contains two ring distributors with the number of internal states 3 and two RC with the number of internal states 4.  In the device for polling channels 3 of the telemetry system, which is the closest to the one proposed, with the after-.  Dope start ring distributors can not get a polling frequency equal to F / 48.  It is necessary to use a mixed launch CD.  In addition, for the two-channel polling of six channels with a frequency of 1-op1 Rt / 9 six channels with a frequency of Fonp2; FT- / 36H lexicographic ordering of sets of binary variables requires a clock generator to be connected to a pulse distributor consisting of b ring distributors on the internal states of the electoral elements, the number of which is equal to the number of polled information channels, channel key elements whose information inputs are connected to the output of the device.  Determine how many channels can be polled with the Fonp FT / 46 polling frequency.  with the known construction of the device.  The issues of joint implementation of channels with different polling frequencies are investigated in the work of del. We use the notion of the relative polling period hl -Tu / FThen we get W} 9, ki2. 3b,  Six channels with the Fonp -Fr / P () polling frequency will disable polling b.  48 channels with a polling frequency oprG -FT / 48.  The condition for the implementation of at least 5 9 single channels with a polling frequency Fj is the condition 1 | -Bk70.  In our case, Wj M-, 48- B, B, 48; 48-48 Oh, t.  e.  This condition is not met.  Thus, the construction of devices for polling channels according to the well-known scheme does not provide for polling a single channel with a polling frequency of Fonp V. The purpose of the invention is to increase the number of polled information channels and polling frequencies.  This goal is achieved by the fact that, in a device for polling telemetry system channels, the output of a clock generator is connected in a pulse distributor with counting inputs of that group of ring distributors, the numbers of internal states of which are mutually prime numbers, the next cells of which are connected the inputs of that group of subsequent ring distributors, the number of internal states of which is equal to the number of internal states of the previous ring distributors, the outputs S tsevyh valves connected to the control inputs of polling elements in the following order, to sequentially start annular distributors; t. .  VN-RI.  ti-iii. , h-s-. , where M, - is the number of a set of binary variables arriving at the inputs of this selective element; t- is the output number of the i -th ring distributor; Vi is the number of internal states -, „„ -) -th ring distribute l; 1 means the integer part of dividing the numerator by the denominator, v-l, b. v. M for parallel start of ring distributors and for mixed start of ring distributors 4.   3r. Hi-t) r iCsj- iv Vi - the set number is binary) of the variables arriving at the inputs of this selective element from the outputs j of the group of ring distributors, PUs.  the number of internal states of the j-group and containing Sj ring distributors; - the number of internal states of the -th ring distributor in the –j and group; tv is the output number of the i -th ring distributor in the group.  , B. Pl, 3,. . . , - the outputs of the selective elements of the pulse distributor are connected to the control inputs of the corresponding group of channel key elements, the numbers of polling cycles of which differ by the value H, d4, where 3. j is the odd of the numbers vh,. . . W | {, PT - clock frequency, polling frequency.  The drawing shows a diagram of the device.  The device contains a clock pulse generator 1, a pulse distributor 2, channel key elements 3, ring distributors 4, selective elements 5, information channels 6.  In particular, when polling six channels - QB with a polling frequency, six channels with a polling frequency - Fj / 36, and eight channels with a polling frequency - Ff- / 48 (where Fp is the clock frequency of the clock circuits) 5 4 (and - And 3))) And 4 4), the output of the clock pulse generator is connected to the counting input of the first and third ring distributors, the last cells of which. , connected respectively. with counting inputs of the second and fourth ring distributors, the first output of the first ring distributor is connected to the first inputs of the first, fourth to seventh electoral elements, 75421 the second output of this ring distributor is connected to the first inputs of the second, fifth and eighth electoral elements, and the third output - with the first cares of the third, sixth and. ninth through twentieth electoral element.  The first output of the second ring distributor is connected to the second inputs of the first, second, thirteenth and sixteenth electoral elements, the second 10 output to the second inputs of the fourth, fifth, sixth and seventeenth electoral elements, the third output to the second inputs of the seventh, eighth, ninth and twelfth electoral elements .  The first output of the third ring distributor is connected to the third inputs of the ninth, thirteenth and seventeenth electoral elements, the second output is connected to the third inputs of the neck of the twelfth and sixteenth electoral elements, the third output is.  with the second inputs of the third, eleventh, fifteenth and nineteenth electoral elements, and the fourth 25 output - with the second inputs of the tenth, fourteenth, eighteenth and twentieth electoral elements.  The first output of the fourth ring distributor is connected to the third inputs of the third and eighth and eighteenth electoral elements, the second output to the third inputs of the fourteenth and nineteenth electoral elements, the third output to the third inputs of the tenth and fifth national electoral elements, and the fourth exit - with the third entries of the eleventh and twelfth electoral elements.  The device operates as follows. With the arrival at the input of the distributor 2 pulses from the generator output, the ring states change. distributors 4. .  In this case, the outputs of the ring j distributors 4 are alternately excited, t.  e.  are, for example, a high potential.  The change of internal states of the first and third ring distributors 4 (the numbering of the ring distributors, their outputs and logical electoral elements will be conducted from top to bottom) occurs after the arrival of each pulse from the output of the generator 1, the change of internal states 4.  occurs after returning the first 4 to the initial state, t.  e.  under the influence of every third clock pulse, and with Ina of internal states of even 5 15 48 vert 4 after returning to the initial state of the third 4 o, t.  e.  under the action of every fourth clock pulse.  After the operation of each clock pulse (in each clock cycle), the polling signals appear at the output of only that selective element whose inputs are connected to output ring distributors excited at that time.  The set of excited outputs of different distributors forms a single set of binary variables, the number of which coincides with the number of the cycle (position) in which these outputs are excited, and is uniquely determined by the numbers of the annular distributors entering this set of outputs (7).  The connection of the dialing number (cycle) with the numbers of the corresponding excited outputs of the ring distributors is determined by the following steps: sequential start of the ring divider and -Gr.  -R. V) ,; V4 ; V4-. / l is the number of a set of binary variables arriving at the input of a given electoral element, t is the number of the output of the -th ring distributor,) is the number of internal states of the -th ring distributor, l- means the integer part of the division of LuiJ, 3, parallel start of ring rasitel t r-vl, mixed start of ring rasitel - Nr-rl-vq-b SvN (n4x). ; r j r-OlSj-i), 994 N is the number of excitation of the state of the j -th group of ring distributors, Njjllvij is the number of internal states of the -th chain, containing 5 ring distributors; - the number of internal states, the -th ring distribution of bodies in the j -th group, fc- is the number of outputs of the -th ring distributor in the -th group “.  . .  , 3,. . , / Let after the influence of the next clock pulse all ring distributors 4 are established in the initial states, t.  e.  the excitations are their first exits.  In this case, the polling signal is generated only at the output of the first electoral element 5, which is connected to the corresponding key element.  Volume 3 of the channel interrogated with the interrogation frequency, for example, the Number of a set of binary variables arriving at the inputs of this element, is equal to 0.  The duration of the polling signal TT is equal to the period of the clock pulse, t.  e.  TT J / FT The full cycle of the survey of all channels contains 1 irr elementary positions (cycles), the duration of each of which is equal to T.  Denote  the numbers of these positions are numbers O, 1, 2. . .  N-1.  Signals with a frequency oppocaFjj p. At the output of the first logical electoral scheme, they occupy the positions with the numbers О, УН ,, 2 w, 3) In our case, Wi-Viix, 9.  In addition to these, directly occupied positions, signals with a period are forbidden to be occupied by polling signals with a lower frequency Rdpr (with a large relative period i2. ), for example, with a survey frequency of / 48 (with a relative period of U1: 48), else.  p d, namely.  K, positions with numbers that differ from one another by the value of fu (where is the greatest common divisor of the numbers wi and yu1c, t.  e.  with numbers 0, di),.   In this example, and forbidden for kaneshes with a frequency of polling. positions have numbers O, 3, 6. . . .  45.  If the outputs of another electoral element, forming as the first signals. interrogation with frequency F, rgnpi connect with the outputs of ring distributors, the set of numbers of which (outputs) forms the number 4lO of a set of binary variables that differ from the number of the set of binary variables that are at the inputs of the first element 5 by the second the channel with the polling frequency Fopp grows at positions with numbers different from those of the positions of the first channel with the same frequency asking for the value and prohibits polling channels with the frequency of reference with numbers.  ,, 3. . .  (in an example 3,69. . .  45, O) t.  e.  the same positions as the first channel with this polling frequency.  Such channels with a survey frequency, | For channels with a frequency of interrogation Rdgts, the same positions of the complete cycle, which are forbidden, can be 1, 1. (Vic- Since each channel with a polling frequency (relative period wi) prohibits polling channels with a frequency of Roprk by the relative period), position 6, then due to the proposed connection of inputs of electoral elements that generate polling signals with a frequency of Fonp-outputs ring distributors, in which the number of sets of binary variables at the inputs of these elements differ from one another by a value, becomes possible on those that are free from each.  groups of.  of channels with a frequency of interrogation p HF / interrogate additional Pi / a large number of channels with a frequency of interrogation of oprk In the considered example, the interrogation frequency Rohrr -r / 9 has six channels.  Since t 9 m 3, then in one b.  ij A, „RU ™ U“. g / 5, channel, The remaining three channels with the polling frequency olr / 9 should be included in another group.  The electoral elements of the first group form the polling signals with the frequency “Upeva (initial), the third and sixth cycles (positions), and the selective elements of the second group - in the first, fourth and seventh cycles (positions).  Similarly, the connection is made to the outputs of the ring distributors of the inputs of the election elements that form the onpiCPonppFonp t) polling signals.   e.  The numbers of the binary variable sets formed by the outputs of the RC should differ from one another by a value of k.  In our example, the Fonp-j onpa 1 frequency is interrogated six channels.  Since rftj.  36 and, then in the same group also includes 36/12 3 channels.  In total we have two pears.  Periv among the polling channels allowed for the frequency of Ronp2. -RG / 36 position has but measure five.  Thus, the elements of the first group form the polling signals at the fifth, seventeenth and twenty-ninth bars (position), and the elective elements of the second group form the eighth, twentieth, and thirty second bars (positions).  The remaining free positions of the full polling cycle of all channels are assigned for polling a channel® with a frequency of,. In our example, the number of such additional polled channels with a frequency of polling OPR T 48 can reach eight.  Thus, the proposed device for polling channels of a telemetry system allows polling a greater number of channels with a given polling frequency as compared to a known device with the same informativeness and the number of internal states of the pulse counter and, therefore, has greater functional capabilities.  Claims of Invention A device for polling channels of a telemetry system, comprising a generator of so-called pulses, a pulse distributor. owls, consisting of 5 ring distributors, on internal conditions of electoral elements, the number of which is equal to the number of polled information channels, channel key elements, information inputs of which are connected to information channels, the outputs are combined and connected to the output of the device, characterized in that In order to increase the number of polled information channels and polling frequencies, the output of the clock generator is connected in the pulse distributor with the counting inputs of that group of ring signals. The number of internal states of which are interrelated but pure numbers, the last KOTOffcix cells are connected respectively to the counting inputs of that group of subsequent ring distributors, the number of internal states of which is equal to the number of internal states of the previous ring distributors, the outputs of the five ring distributors are connected to the control The entries for the electoral elements are in the following order.    ,-but; . one).  ) Cs. j-i) where N. - the number of the turn on cycle of the given electoral element; j M; - the number of a set of binary variables arriving at the inputs of this selective element from the outputs j of the group of ring distributors; t- is the output number} of the koltsev. . , the distributor, i I is the number of internal states of the p and t group containing the Sj kol -. l target distributive, and; - the number of internal states of the i-th ring distributor in the j-group.  VMl. i «1Г-Г- 1, 3,. . . ; , the outputs of the selective elements of the pulse distributor are connected to the control- ling inputs of the corresponding group of channel key elements, the numbers of polling cycles differ by the value of dl / f. . . , k, where d ,,. ,, to the hod clock frequency number, is the polling frequency. B, Sources of information taken into account during the examination 1. Freko A.  AT.  Telemetry  M. , Higher School, 1975.  with.  208-21O, rice, 6. 11-6. 13.   2. Andrews Davis Schwartz, Adaptive Data Compression.-Proceedings of the Institute of Electronics and Radio Electronics. (TIER). T. 55, 1957, No. 3, p. 25-38. 3.Karamov 3. S., Fomin A. F. Elements of analog radio telemetry systems. M.-L., 1967 (prototype). 4.Link L. Amplitude-pulse code-pulse modulation () In the book. Vsedushno-cosmic telemetry 139421 (collection of materials). M ,, Military. MO USSR, 1968, p. 227-238. 5. Mikheev A. A. About the formation of periodic sequences of signals I switch with unequal periods of 5. - Sat. Radio electronic devices. Labor P zana Radiotechnical Institute. Issue 43, P, 1975., p. . 6.Mikheev A.A. On the joint implementation of polling signals with unequal 41 repetition periods. Intercollegiate Sat., Management Transfer the transformation and display of information. Issue 1, P, 1974, p. 75-80. t - 1 l D d 7. Mikheev A.A., Nechaev G.I. About. the globalization of periodic sequences of switching signals using ring distributors. - Instrument making, t. XV 1972, No. 11, Izdvvo Universities, p. 58-62,