SU1114967A2 - Device for determination of pulse repetition period - Google Patents

Abstract

DEVICE DETERMINATION OF THE PERIOD OF REPEATING PULSES by author. St. No. 953583, characterized in that, in order to expand its functionality, an AND element, a pulse counter, an adder, a first and second AND-OR element, and an NOT element are introduced into it, the second output of the counting and calculating time interval unit being connected to the input of the analysis unit through the element AND, as well as with the 11th first input of the adder, directly, and the second output of the block.counters and the output of the block of the adders are connected respectively to the first and second inputs of the averaging block through the first and second elements, respectively, AND-OR, the second inputs the latter, as well as the second input of the adder, the input of the pulse counter, the input of the element is NOT connected to the first output of the counting block and the calculation of time intervals, the output of the element is NOT connected to the second input of the AND element and the third inputs of the first and second AND-OR elements, the fourth inputs of which are connected respectively to the first output of the pulse counter and to the output (L of the adder, the third input of which is connected to the output of the averaging unit, and the fourth input to the second output of the pulse counter.

Description

4 O) The invention relates to a measuring technique. According to the main auth. 953583 A device for determining the pulse repetition period is known, which contains an averaging block, a block of counters, an accumulator block, an analysis block and a counting block and computing time intervals whose input is connected to the input bus, the first output is connected to the first input of the counter block, and the second output is connected to the block input analysis, the first output of the analysis block is connected to the first input of the block of adders, and the second output to the second input of the block of meters, the first output of which is connected to the second input of the block of adders, and the second output to the first input of the block nor, the second input of which is connected to the input of the block of adders, and the output with the output bus of the device, the analysis block contains a storage unit for evaluating the pulse repetition period, a counter for the control block, and a comparison block, the first input of which is connected to the second output of the counting block and time slots and to the input of the control unit, the second input to the output of the storage unit estimates the pulse repetition period, the third input of the comparison unit to the first output of the control unit, the first output of the comparison unit to the first input of the sum block The second output is connected to the first input of the storage unit of the pulse repetition period estimates, the second input of which is connected to the first output of the analysis unit counter, the input of the analysis unit counter is connected to the second output of the control unit, and the second output of the analysis unit counter to the second input of the counter meters l . A disadvantage of the known device is the specific functionality. The purpose of the invention is to expand the functionality of the device. This goal is achieved in that the pulse counters element, the adder, the first and second AND-OR elements and the NOT element are entered into the device for determining the pulse repetition period, the second output of the counting block and computing time intervals is connected to the input of the analysis unit through the AND element, and also with the first input of the adder directly, and the second output of the block of meters and the output of the block of adders are connected respectively to the first and second inputs of the averaging block through the first and second elements AND-OR, the second inputs of the latter, as well as the second th input of the adder, the input of the pulse counter and the input element is NOT connected to the first output of the block counting and determining time intervals, the output of the element is NOT connected to the second input of the AND element and the third inputs of the first and second AND-OR elements, the fourth inputs of which are connected respectively to the outputs a pulse counter and an adder, the third input of which is connected to 1c by the output of the averaging unit, and the fourth input to the second output of the pulse counter. FIG. 1 shows a block diagram of a device for determining the pulse repetition period; figure 2 structural diagram of the analysis block. The device contains a block of 1 counting and computing time intervals, block 2 of analysis, block 3 of adders, block 4 of counters, block 5 of averaging, element 6, pulse counter 7, / adder 8, first element AND-OR 9, second element AND- OR 10, the element is NOT 11. The input of block 1 is the input of the device, and the first output of block 1 is connected to the first input of block 4, as well as to the input of the element NOT 11, with the second inputs of the first and second elements AND-OR 9 and 11, c the second input of the adder 8 and with the input of the counter 7. The second output of block 1 is connected to the first input of the adder 8 and to the first input of the el And 6, the output of which is connected to the input of block 2 analysis. The first and second outputs of block 2 are connected to the first input of block 3 and the second input of block 4, respectively, and the output of block 3 is connected to the first input of I-III 10, the output of which is connected to the second input of block 5. Block 4 has two outputs, the first is connected to the second input of block 3, and the second to the first input of IShSh 9, the output of which is connected to the first input of block 5. The first and second outputs of counter 7 are connected respectively to the fourth input of I-III 9 and to the fourth input of the adder 8, and the output of the element NOT 11 is connected to the third inputs of the elements of the AND-AND And 9 and 10 and second input member and 6. The output of the adder 8 is connected to a fourth input of AND-OR 10 The third input of the adder 8 is connected to the output unit 5, which is removed with the result of the measurement pulse repetition period or repetition period of bursts. The analysis unit 2 comprises a comparison unit 12, a pulse repetition period estimates storage unit 13, a counter 14 and a control unit 15. The first input of the comparator unit 12 is connected to the output of the AND 6 element and to the input of the control unit 15, the second input of the unit 12 is connected to the output of the pulse repetition period estimates storage unit 13, the third input of the unit 12 to the first output of the control unit 15, the first output of the unit 12 - to the first input of block 3 of adders, and the second output to the first input of the evaluation pulse period evaluation unit 13, the second input of which is connected to the first output of the counter 14, the input of the counter 14 connected to the second output of the control unit 15, and the second output of the counter 14 - with the second in building block counter 4. The apparatus operates as follows. The time codes for receiving the input pulses of the stack are successively input to the counting unit 1 and calculating the time intervals, where the determination of the time intervals between two adjacent pulses itj, which enter the analysis unit 2 through the element biv of the adder 8 is included. the register in which the maximum value of the time interval is stored, specified a priori. If the value of & i | between adjacent pulses will be more than the maximum allowable time interval taking into account pulse disappearance, then the End of the packet signal is generated at the second output of counting block 1 and computing time intervals) In block 2 of the analysis, a consistent comparison of the time interval utj with the contents of the registers of the evaluation storage unit 13 pulse repetition period. If the contents of the register to be checked are zero, then the newly received integral ut | is written to the register as 674 of the first estimate of the repetition period of pulses and is added to the sum of one of the adders of block 3, and one is added to one of the counters of block 4, whose numbers are determined by the index of the counter value 14 of block 2. When the inequality is zero check condition, / U; -Tj / e, (1) where T; - the contents of the checked register of the unit 13 for storing the estimates of the pulse repetition period; - the specified permissible error of measurement of the time interval is stored in the special register of the storage unit 13 of the estimates of the pulse repetition period. When condition (1) is fulfilled, the content of the counter 14 of block 2 is increased by one and the content of the next register of the storage unit of the repetition period of pulses 13 is rst analyzed, otherwise the time interval is added to the contents of the adder of block 3 and one is added to the counter of block 4 The numbers of the adder of block 3 and the counter of block 4 are determined by the contents of the counter 14 of block 2. As a result, the initial packet of pulses is divided into subpacks, the sum of time intervals of each subpackage is stored in from the sum of block 3, the number of received time intervals of the patch is in the corresponding counter of block 4, and the sum of all received time intervals of the pack is in the night 8. After the last Krd time of receiving the pulses of the packet arrives, the block 1 produces a signal End of the packet which the content of the counter 7 is increased by one, element 6 is closed, the outputs of blocks 3 and 4 are connected to the inputs of block 5, and the outputs of the adder 8 and counter 7 are turned off, and the comparison circuit of block 4 searches for the number of the counter with the maximum According to The contents of the found block of block 4 and the block 3 coinciding with it according to the number of the block 3 through elements 9 and 10 appear in block 5 of averaging, where the pulse repetition period of the packet is determined by dividing the sum of the summator;

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block 3 to the value of the counter of block 4. The result of the enrollment is stored in the high register of block 5. After a certain time, determined by the operation of block 4, the state of the counter 14 and the registers 13 of the storage of the estimates of the pulse repetition period, block 3, counters are reset to O 4, after which the device is ready to receive a packet of pulses. The condition for determining the pulse repetition period is dominance. true (undistorted) intervals in a packet of received pulses, as well as the correct choice of the number of registers in block 13 of the storage of estimates of the period of repetition of pulses, adders in block 3 and counters in block 4.

After block 1 receives the input time code of the first pulse of a new packet, the time interval & T between the last pulse of the previous packet and the first pulse of the new packet is calculated, which then goes to the adder 8. The next calculated time interval tj resets the signal End packs in block 1. As a result, element 6 is opened and time intervals & t arrive at block 2, the sum ftt of the previous pack and Т T is written to the output register of adder 8, and the inputs of block 5 and 4 are connected to the inputs of block 5 Chica 7

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and cooler 8. While blocks 2-4 are busy processing incoming time intervals utj, block 5 determines the repetition period of 5 burst by dividing the contents of the input register of the adder 8 by the contents of counter 7. The measurement result is entered into the output register of block 5 . With the arrival of the block

 1 pulse End of the pack, block 5 again starts the calculation of the pulse repetition period.

In counter 7, after reaching the maximum value of a trace with a pulse of 5 pulse. The end of the pack sets a single state, and the last calculated repetition period of bursts of pulses 20 from the output of block 5 is reset and recorded in the adder 8. Thus, the repetition of the bursts of pulses is ensured. at each subsequent accumulation cycle in the counter 7 and the adder 8.

25 The proposed device, in contrast to the known one, allows one to determine, in addition to the pulse repetition period, another characteristic of the pulse sequence — the repetition period of 30 bursts of pulses. Moreover, this is achieved with minimal equipment costs, since when calculating each characteristic of a pulse sequence, one and

5 the same block of calculation and computation of time intervals and averaging block.

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Claims (1)

DEVICE FOR DETERMINING THE PERIOD OF REPEAT OF PULSES by ed. St. No. 953583, characterized in that, in order to expand the functionality, an element And, a pulse counter, an adder, the first and second I-IPI elements and the element NOT are introduced into it, the second output of the block for calculating and calculating time intervals connected to the input of the block analysis through the AND element, as well as with the first input of the adder directly, and the second output of the block of counters and the output of the adder block are connected respectively to the first and second inputs of the averaging block through the first and second AND-OR elements, the second inputs of the last x, as well as the second input of the adder, the input of the pulse counter, the input of the element is NOT connected to the first output of the counting unit and calculating time intervals, the output of the element is NOT connected to the second input of the AND element and to the third inputs of the first and second AND-OR elements, the fourth inputs of which respectively connected to the first output of the pulse counter and to the output of the adder, the third input of which is connected to the output of the averaging unit, and the fourth input is connected to the second output of the pulse counter. 1114967 2