SU864544A1 - Method and device for measuring pulse amplitude - Google Patents

Description

one

The invention relates to digital measurement technology and information transmission technology and can be used to measure the amplitude of pulsed signals from various sources, in particular, signals received from the output of an information transmission line with a coefficient instability. ,ten

A known method of digital measurement of the amplitude of pulse signals, in which quantum information and auxiliary signals are used, the number of measures of the auxiliary signals is equal to the number of measures of information signals, in the interval of each pulse the information signals belong to one of the zones in amplitude, In accordance with this, one of the auxiliary signals is selected, with the help of which a single amplitude correction signal is formed, which also BEFORE the information signal IJ.

The disadvantage of the method is the large number of auxiliary signals used, as well as the absence of averaging auxiliary signals, as a result of which a large

The magnitude of the random error and measurement accuracy is reduced.

There is a known method for digitally measuring the amplitude of pulsed signals, by which quantized informational signals are used, and auxiliary signals. In this case, auxiliary signals of one measure are used, these signals are averaged and amplitude correction signals are generated using the number of zones in amplitude. information signal belonging to one of the zones by amplitude by comparison with reference signals, in accordance with which a certain amplitude correction signal is selected, which is l added to 2 sigNsShU information.

For implementing the method, a device for digitally measuring the amplitude of pulse signals is known, comprising an analog-to-digital converter, the output of which is connected to the first input of a key unit, the second input of which is connected to the input of an analog-digital converter through a synchronizer, the second output of which is connected to the first input of the block, memory and with the entrance of the installation counter.

the output of which is connected to the input of the first increment calculator, the memory unit whose output is connected to the first input of the first comparison and selection unit.

A disadvantage of the known method is low accuracy when the amplitudes of pulses are nonlinear on a measuring scale, since the generated correction signals are proportional to the amplitude of the received auxiliary signal of one measure, and also due to the time lag of the amplitude correction signals relative to the information signals.

The purpose of the invention is to improve the measurement accuracy.

This goal is achieved by the fact that in the method of digital measurement of the amplitude of pulse signals, based on the use of quantized information and auxiliary signals by a number of measures smaller than the number of measures of information signals, the information signals belong to one of the zones in amplitude in the interval of each pulse by comparison with traditional ones. signals, averaging auxiliary signals and generating amplitude correction signals for information signals; the number of measures of auxiliary signals are set at least two, pre-store the quantized informational and auxiliary signals and determine whether the auxiliary signals belong to one of the zones in amplitude, and after averaging, form the amplitude correction signals of the auxiliary signals, mix them with auxiliary reference signals when determining the following auxiliary signals signals to one of the zones in amplitude, after forming the correction signals, the amplitudes of the information signals are added, summed with the information by reference signal signals when determining whether the informational signals are located in one of the zones in amplitude, then the address of the belonging area of each information signal is converted into a digital code.

A device for digitally measuring the amplitude of pulse signals, comprising an analog-to-digital converter, the output of which is connected to the first input of a key block, the second input of which is connected to the input of an analog-digital converter through a synchronizer, the second output of which is connected to the first input of the memory block and to the installation input a counter whose output is connected to the input of the first increment calculator; a memory block whose output is connected to the first input of the first

a comparison and selection unit, an additional comparison and selection unit, two reference signal generating units, an additional calculator of code converter, a difference module generating unit and an output signal generator, the analog-digital converter output connected to the second memory block input, the output of the key block connected to the first input of the additional unit of comparison and selection, the output of which is through a counter, the first calculator of increments and the first block of the formation of reference signals It is connected with its second input, the second output of the counter is connected via an additional increment calculator and the second block of forming reference signals is connected to the second input of the first comparison and selection block, the output of which is connected to the outputs of the output signal generator through a code converter and a shaping unit.

The structural electrical circuit of the device is shown in the drawing.

The device contains an analog-to-digital converter 1, the output of which is connected through a serially connected memory 2, a comparison and selection unit 3 and a code converter 4 are connected to the input of the output signal generator 5, a synchronizer b, the output of which gates of the auxiliary signals is connected to the control input. key block 8, the output of which is connected through a serially connected comparison and selection block 9, a counter 7, a calculator of 10 increments and a block 11 of generating reference signals are connected to the video of block 3, a block 12 of forming a difference module, the output of a counter 7 through a serially connected calculator of 13 increments and a block 14 forming the main signals are connected to the inputs of block 9, the output of block 3 through the block 12 forming the difference module is connected to the second input of the output signal generator 5.,

Ustrh5ystvo works in the following way. .

The mixed stream of information signals of measure N and auxiliary signals of measure p from the output of the transmission line is fed to the inputs of analog-digital converter 1 and synchronizer 6. Synchronizer 6 generates audio signals determining the averaging cycle of the auxiliary signals and the refresh cycle of the reference signals to determine the amplitude belonging to the measured pulses. The entire information flow, the cycle time, is memorized in block 2. In key block 8, auxiliary signals of different measures are made from the total pulse flow. For this, control strobe pulses are formed in synchronization 9Pb. In block 9, the received auxiliary signals c4) are associated with n reference signals (reference digital combinations) formed in block 14. The signals from the output of block 9 are averaged by accumulation - in counter 7, the number of stages of counter 7 being equal to the number of measures of auxiliary signals n and not less than two. In calculator 13, the signals of correction signals amplitude | are calculated using output signals of counter 7 at the end of each cycle; the number of measures of which From these signals, in block 14, n reference signals are formed. Thus, the device has a ring of feedback, which allows both the level and the scale of the measured pulse amplitude to change, to generate reference auxiliary signals, so that the auxiliary signals of each measure: accumulate in their stages of the counter 7, the signals from which are used in the device to form in block 11 (about the definition of the zone of belonging) the amplitudes of the information pulses. In the calculator 10, the amplitude correction signals are calculated from the output signals of the counter 7, from which N of these combinations are formed in block 11, the formation of N signals in block 10 by the input signals is performed by interpolation, and the additional (Nn) signals is located evenly between the n input signal 14 and. Between each two input signals, there are additional N – N signals, and the increment of any of the N – n signals is ANij calculated by the formula: 6Nv-i H / tЫL. k AI / L is the number of the zone determined by any pair of adjacent auxiliary signals; j is the number of the additional signal in zone I; Lp is the increment of test signals. In case of instability of the level and scale in the transmission channel, the slots Ofn of information and auxiliary signals are changed, and the extinctions of the latter are averaged and. used to change the reference signals of the determination of the membership of the measured signals / which is carried out in block 3. The output signals of block 3, representing the measurement result in the positional code, in the converter 4 is formed a parallel binary code. corresponding to the measurement result of the amplitude of each pulse. To improve the reliability of measuring the amplitude of the pulses, the smallest of the signals of the difference between the received signal and the reference signals from block 3 enters the block 12, the output signal of which corresponds to the deviation module of the received signal from the nominal level. In the absence of interference in the transmission line, regardless of the zone of belonging of the information signal, in block 12, the same digital combinations are received, corresponding to the middle of the zone. If there is interference, depending on their level, a proportional increase in the deviation of the modulus of the difference at the output of block 12 takes place. In the shaper 5, an output measurement signal is generated in digital form, the higher bits of which correspond to the quantized value of the measured amplitude, and the lower ones determine the reliability of the measurement and be used to select measurement data from the output of the main or backup path, as well as during processing for rejecting invalid information. Thus, when the amplitude of each pulse changes during transmission, changes in the amplitude of the auxiliary signals are initially detected, the number of measures is small to save bandwidth of the transmission line, and the averaged auxiliary signals are used both to correct the amplitudes of the auxiliary signals and to correct the bit signals of the information signals . The method of measuring the amplitude of the pulse signals makes it possible to increase the measurement accuracy, especially when the amplitudes of the pulses are nonlinear on a measuring scale, since increments for correcting the amplitudes of informative signals are generated for each K pair of auxiliary signals nearest to them. In addition, there is no time lag between the information signals and the corresponding amplitude correction curves, which increases the degree to which the corrective increments correspond to changes in the signal amplitude and increases the measurement accuracy. The device can be used in measurement technology, in single-channel amplitude meters, as well as in multichannel (multi-frequency) receiving devices of information transmission and reception systems, in which it is necessary to accurately measure the signal size in each frequency channel before deciding on the choice of maximum signal.

Claims (2)

Claim 1. A method for digitally measuring the amplitude of pulsed signals based on the use of quantized information and auxiliary signals with a number of measures less than the number of measures of information signals, on the interval of each pulse, the information signals belong to one of the zones in amplitude by comparison with the reference signals, auxiliary signals are averaged, and generate signals for correcting the amplitude of information signals, characterized in that, in order to improve the accuracy of measurement, the number of measures of auxiliary systems the channels set at least two, previously memorized-quantized information and auxiliary signals and determine the belonging of the auxiliary signals to one of the zones by amplitude, and after their averaging, the correction signals of the amplitude of the auxiliary signals are generated, summed with auxiliary reference signals when determining the belonging of the subsequent auxiliary signals to of one of the zones in amplitude, after the formation of the signals for the correction of the amplitude of the information signals, they are summed with information reference signals when determining the belonging of information signals to one of the zones by amplitude, after which the address of the zone of membership of each information signal is converted into a digital code. 2. The device for implementing the method according to claim 1, containing an analog-to-digital converter, the output of which is connected to the first input of the key unit, the second input of which is connected to the input of the analog-to-digital converter through a synchronizer, the second output of which is connected to the first input of the memory unit and with the installation input of the counter, the output of which is connected to the input of the first increment calculator, a memory unit, the output of which is connected to the first input of the first comparison and selection unit, characterized in that, in order to increase the accuracy of the measurement In addition, an additional block of comparison and selection, two blocks of the formation of reference signals, an additional calculator of increments, a code converter, a block for generating a difference module and a driver of the output signal are introduced, the output of the analog-to-digital converter connected to the second input of the memory block, the output of the key block connected to the first the input of the additional unit of comparison and selection, the output of which is through the counter, the first calculator of increments and the first block of the formation of reference signals is connected to its second input Second counter output through additional increments calculator and a second reference signal generating unit connected to the second input of the first comparator and vybor'a, the output of which through the code converter ⁷ and the forming unit module connected to the difference input of the output signal.