SU549816A1 - Device for summing signals - Google Patents

Description

(54) DEVICE FOR SIGNATING SIGNALS

This invention relates to automation and computing.

Devices for summing signals are known, comprising null-bodies, a scan variable generator, and counters (recorders), the number of which is equal to the number of summed signals 1.

The disadvantage of such devices is their complexity, increasing in proportion to the number of terms.

The closest analogue to this invention is a device for summing signals, containing a scanning magnitude generator, null organs, triggers, OR elements, a control key, a block of fixing the number of triggered zero organs, a controlled clock generator, a recorder, a zero level indicator and switch. The first inputs of the zero-organs are connected to the corresponding inputs of the device, and the outputs of the inputs of the corresponding triggers, the outputs of which are connected to the Inputs of the fixing block of the number of triggered zero-organs and the OR element whose output is connected to the input of the controlled key. The block of fixing the number of triggered nullorgans is connected via a switch to the inputs of a scanning magnitude generator and a controlled clock pulse generator, the output of which is connected to another

the input of the controlled key, the output of which is connected to the recorder 2.

The specified device does not allow summing signals of a different sign, which, for example, is important when determining the alternating sum of deviations from the specified settings in automation devices, i.e., determining the algebraic sum. In addition, this device does not determine the sum of normalized terms (sums of terms with different weighting factors). This sum represents the approximate value of the integral determined by the readings of individual (point) detectors located in the field of the monitored parameter.

The aim of the invention is to expand the functionality of the device, i.e., determine the algebraic sum of the signals and the sum of the normalized terms.

This goal is achieved by the fact that the proposed device additionally contains a delay element and nodes specifying normalizing coefficients. The zero-level indicator output is connected to other trigger inputs and to the recorder reverse input through a delay element, and other inputs of null-organs are connected to the outputs of the nodes specifying the normalizing coefficients, the inputs of which are connected to the output of the scanning magnitude generator.

FIG. 1 shows a diagram of an apparatus for summing signals; FIG. 2 is a timing diagram explaining its operation.

The device for summing the signals comprises a scan variable generator /. null organs 2, triggers 3, element OR 4, control key 5, block for fixing the number of triggered null organs 6, control clock generator 7, recorder 8, zero level indicator 9, switch 10, normalizing factors setting node / / and time delay 12.

The generator of the scanning quantity / is an oscillatory system, the output value of which varies according to a linear law of different polarity (see Fig. 2). Recorder 8 is a controllable reversible counter.

The node specifying the normalization coefficients is designed to change the amplitude of the total scanning quantity from the generator / without changing the scanning period, and according to the theory of scanning systems, the conversion of signals into a time interval allows these signals to be normalized to the corresponding weights proportional to the change in amplitude of the scanning quantity.

The node specifying the normalization coefficients can be performed according to the voltage divider circuit. Delay / 2 is necessary to eliminate device malfunction at the moment of changing the sign of the scanning value.

In the outgoing state, the scanning value, taking into account the normalizing coefficients, applied to the first inputs of null organs 2, is greater than the possible values of positive summable signals fed to the second inputs of null organs 2. The signals at the outputs of the trigger 3, the element "OR 4, the zero level indicator 9, as well as blocks 5 and 7 are missing. Managed key 5 is closed.

Consider the operation of the device for the case when the coding of the common components in the amplitude distribution of the summed signals is carried out by changing the frequency of the controlled generator of clock pulses 7. In this case, the output of block 6 through switch 10 is connected to the input of generator 7.

The scan value from the output of the generator 1 is fed to the inputs of the nodes specifying the normalization coefficients, thereby multiplying each of the summable bipolar signals by the corresponding weighting factor. Let it be required, for example, to determine the algebraic sum of three signals with normalizing coefficients, two of which (X and) are positive, and the third (X is negative.

When reducing the scanning values from the outputs of nodes 7 / from its positive maximum value to zero

the moment of equality of the corresponding scanning value with the signal (X.}, (Fig. 2, TI). As a result, the corresponding null organ 2 and the trigger, 3 (Fig. 2.6) are triggered. Immediately at this moment the signal from the output of block 6 sets frequency, rabbi / from. e. frequency proportional to the number of actuated il organs. At the same time, the signal from the output of the element “OR 4 opens the key 5, and the pulses from the generator 7 begin to arrive at this point at the input (+) of the recorder 8 (FIG . 2, e), in which the term begins to register in the code with the corresponding norm coefficient, the frequency from the output of the generator 7 remains fixed until the corresponding scanning value equals the signal X (Fig. 2, Gd). At this point, the second null organ (Fig. 2, c) is triggered, which is fixed The device 6 sets the frequency from the generator output to 2 / o, i.e., is proportional to the number of actuating null organs. 2, e) a frequency multiple of the number of common components in the distribution of positive amplitudes of the summed signals at a given time interval in the scanning cycle begins to be received through the public key 5. This frequency remains fixed until the positive signal is equal to the corresponding scanning value.

At the moment of equality of the positive scan value to zero, the signal from the output of the generator 1 reaches its negative maximum value, and the zero level indicator 9 (Fig. 2, (5) triggers, the signal from the output of which, delayed by circuit 12 to the scaling time switch, returns triggered triggers In this case, the signal at the output of element 4 disappears, the key 5 closes, thereby stopping the pulse from generator 7 to the recorder 8. Since the output of the zero level indicator 9 is The support / 2 is connected to the input of the reverse of the recorder 8, then the signal from the output of the delay / 2 switches the input of the recorder from (+) to (-), thereby preparing the recorder 8 to sum the negative signals.

As the scanning value from the outputs of the nodes // from its negative maximum value tends to zero, there comes a moment of equality of the corresponding scanning value with the signal Xs (Fig. 2, Gz). As a result, the corresponding zero-body 2 and trigger 3 (Fig. 2, d) are triggered. Immediately at this moment, the signal from the output of block 6 sets the frequency equal to fo pulses from generator 7 begin to arrive at input (-) of recorder 8 (FIG. 2, g), and the sum of positive signals 1 and Hh is subtracted from the number-pulse equivalenit with the corresponding normalizing coefficients until the scan value is equal to zero.

Thus, in the recorder 8, the algebraic sum of the terms with the corresponding weights is memorized;

When calculating the normalized sum of the signal values, the second generator input of the scanning quantity is connected to the source of the normalizing signal.

If the coding of the common components in the amplitude distribution of the summed signals is carried out by changing the tilt angle of the scanning function at the corresponding points in time in the scanning cycle, then the output of the fixing device for the number of triggered 6 bodies is switched to the first generator input L through the generator. remains fixed throughout the entire scan cycle. The dynamics of the interaction of the remaining elements of the device remains the same.

Thus, the described device allows the algebraic sum of signals to be calculated, which is necessary when solving problems related to the construction of adders in analog-digital computing devices and digital regulators, and to calculate the sum of normalized signals, which is the equivalent of integrals, According to the indications of point sensors located in the field of the monitored parameter.

Claims (2)

1. F. Ye. Temnikov. “The Theory of Deploying Systems, Gosenergoizdat, 1963, pp. 46-51. 2. Avt. St. USSR Lo 444182, cl. G 06 F.7 / 50, 04/17/73 (prototics).