SU1285389A1 - Device for detecting and measuring signal maximum - Google Patents

Abstract

The invention relates to computing. The goal is to improve the accuracy of measuring the maximum signal (MS). The device for detecting and measuring the MS contains a comparison unit 1, a generator (D) 2 sawtooth voltage, triggers 3, 4, D 5 pulses, frequency dividers 6, 7, controllable switches 8, 9 and. counter 10. The purpose of the invention is achieved by the introduction of new functional connections between electrical elements, moreover, the linearly falling voltage is used as the sawtooth voltage. The measurement of the MS is performed with high accuracy, due to the determination of the magnitude of the maximum by its single measurement upon detection. The invention can be used in the processing of information coming in both continuous and discrete form. I zp f-li 2 ill. S

Description

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The invention relates to computing and can be used in the processing of information coming in both continuous and discrete form.

The purpose of the invention is to increase the accuracy of measuring the maximum of a signal by detecting the maximum of the signal at the beginning of the measurement, and then its analog-digital conversion and recording the maximum value into the counter.

1 shows a functional diagram of the device; 2 shows timing diagrams for his work.

The device contains a comparison unit 1, a sawtooth voltage generator 2, triggers 3, 4, a generator of 5 pulses, frequency dividers 6 and 7, controllable switches 8 and 9 and a counter 10. The output of the generator 5 pulses is connected to the inputs of frequency dividers 6 and 7 and To the input of the control key 8, the output of the frequency divider 6 is connected to the setup inputs of the trigger 3 and 4 and to the control input of the sawtooth generator 2, the output of which is connected to the first input of the comparison unit 1, the second input of which is the device input and the output - to the second installation the trigger input 4 and the input of the second control key 9, the second input of which is connected to the output of the trigger 3 and the input of the first control key 8, the output of which is connected to the counter 10, the reset input of which is connected to the output of the control key 9 and the control input of the divider 7 frequency, the output of which is connected to the second installation input of the trigger 3, while the installation bus of the initial state of the dividers 6 and 7 of the frequency are connected to the device start terminal.

The device works as follows.

The input signal is fed to one of the inputs of the unit 1 of the comparison.

Simultaneously with the arrival of the input signal, the generator of 5 pulses starts and the dividers 6 and 7 are installed, the parameters of which are identical, into the initial state. Through a frequency divider 6, the time interval between two operations of which is equivalent to the scale of the device, the generator 2 of the saw-tooth voltage is started, the amplitude O

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Yes, the signal of which is known to be greater than the maximum value of the input signal. The output signal from the frequency divider 6 also goes to the first input of the trigger 3, drives it to the one state corresponding to the presence of signal 1 at the output, and to the second input of the trigger 4, drives it to the zero state corresponding to the absence of the signal O at the output.

The first control key 8 is closed by a signal from the output of the second trigger 4, therefore, the pulses from the generator output 5 pulses to the input of the counter 10 do not pass.

In the first measurement cycle, when comparing the input signal with the sawtooth voltage, a pulse appears at the output of the comparison unit 1. This pulse through the second control key 9, opened by a signal from the output of the first trigger 3, is fed to the reset bus of the counter 10 and the control input of the second frequency divider 7, driving them to their initial state. .

The impulse from the output of block 1 also enters the first input of the second trigger 4, transferring it to the unit state. The output signal from trigger 4 is fed to the input of the first controlled key 8, preparing it to transmit pulses from the generator 5 pulses to the counter 10. Through the controlled key 8, opened by signals from the outputs of the trigger 3 and 4, the pulses from the generator output 5 pulses pass on the counter 10.

When the frequency divider 6 is triggered, the trigger 4 is moved to the zero state, closing the control key 8. On the counter 10, the number of pulses is proportional to the input signal.

If the input signal is increased, the order of operation of the device in subsequent measurement cycles is maintained. Thus, at the end of each measurement cycle, the meter 10 contains the digital equivalent of the maximum value of the input signal.

When the input signal decreases, the frequency divider 7 is triggered before the comparison unit 1. The signal from the output of the frequency divider 7 is fed to the input of the trigger 3, transferring it to the zero state. The control key 9 is closed by a signal from the output of the trigger 3, therefore the operation of the block 30

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- Comparing when comparing the sawtooth voltage with the input signal does not reset the frequency divider 7 and the maximum recorded in the counter 10. The signal from the output of the trigger 3 also closes the controlled key 8, preventing the passage of pulses from the generator output 5 pulses to the input of the counter 10,

Until the value of the input signal exceeds the value of the previously measured maximum, the frequency divider 7 is triggered in each measurement cycle before the comparison block I. The operation of the divider 7 frequency leads to the transfer of trigger 3 to the zero state. The output signal of the trigger 3 closes the controlled keys 8 and 9, which prevents the input signal maximum recorded in the counter 10 from being reset and the frequency divider 7 is reset to its initial state.

When the input signal exceeds the maximum value recorded in the counter 10, block 1 will work before frequency divider 7. The impulse from the output of the comparison unit 1 through the open control key 9 goes to the control input of the frequency divider 7, drives it to the initial state, and resets the reset bus of the counter 10, preparing it to record the new maximum value.

The same impulse will flip trigger 4 into one state. The signal from trigger output A opens controllable key 8. Pulses from generator output 5 pulses through control key 8 pass to counter 10, in which At the end of the measurement cycle a new maximum value is contained. Note that, in comparison with the known device, the proposed change in the assignment of one of the triggers, namely, that which i of the known device was used to allocate time intervals proportional to the increments of the input signal. In the proposed device, this trigger is used to introduce measurement cycles in which the value of the input signal exceeds the maximum recorded in counter 10.

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Timing diagrams (fg, 2) show the state of the outputs of the comparator unit 1, frequency dividers 6 and 7, triggers 3 and 4, and counter 10.

Thus, the maximum of the input signal is measured with high accuracy, due to the determination of the maximum value by measuring it once once, upon detection, which causes the advantage of the proposed device in comparison with the known one. The structure of the device is also simplified by eliminating one managed key.

Invention Formula

Claims (2)

1. Device for detecting and measurement of the signal maximum, containing two triggers, two controllable keys, a pulse generator connected to the first and second frequency dividers and through the first controlled key to the counter, the output of the first frequency splitter connected to the first input of the first trigger, the pilot-shaped voltage generator, the input of which is connected to the output of the first frequency divider, and the output to one of. the inputs of the comparator, the other input of which is the device input, the output of the comparator is connected to the first input of the second flip-flop and through the second controlled key to the control input of the second frequency divider, the output of the second flip-flop is connected to the input of the first controlled switch Neither frequency dividers are combined and connected to the start terminal, which is different from the fact that, in order to increase the maximum measurement, the output of the first frequency splitter is connected to the second input of the second trigger, the output of the second The frequency divider is connected to the second input of the first trigger, the output of which is connected to the input of the controlled key and through the second controlled key to the reset bus of the counter. 2. The device according to claim 1, t, l, and is often so that a linearly falling voltage generator is used as a sawtooth generator. t t t FIG. 2