SU546892A1 - Multichannel device for selecting the minimum value of the average value - Google Patents

Description

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The invention relates to the field of computer technology and may find application in information processing.

A single-channel device I is known for selecting a minimum average value comprising a period meter, counters, and memory elements. When determining the minimum average value using this device, samples taken at different points in time are analyzed, which reduces the measurement accuracy.

It is also known a multichannel device 2, which contains in each channel an indicator and a series-connected sensor, a voltage-to-frequency converter, an averager and a memory element, the first output of which is connected to the input common to all channels of a multi-input element I.

A disadvantage of the known device is that it provides data only about the minimum average value, but does not allow to obtain information on whether there are values in other channels, for example, frequencies. Multiples of the minimum average value and in which channels they are contained, which is very important when testing various structures, for example, in those cases when you need to know not only the minimum value of the average value, but also the presence of higher harmonics in the controlled object. the order and in which channels they are contained.

In order to expand the class of tasks in the proposed device, a common delay element is introduced in each channel and a three-input element And in each channel, the first input of which is connected to the output of the averager, the second input - to the first output of the memory element, and the third input is connected to the output of the multi-input element and to the input of the delay element, the output of which is connected to the corresponding inputs of the memory elements of the averagers, the output of the three-input element I is connected to the indicator of its own channel.

The drawing shows a diagram of the proposed device.

It consists of L channels, each of which includes a sensor 1, a voltage-frequency converter 2, whose input

connected to the output of sensor 1, the averager 3, the first input of which is connected to the output of the converter 2, the memory element 4, the first input of which is connected to the output of the average 3, three-input element AND 5, two control inputs of which are connected to the output of memory 4 and the average of 3, and the indicator of the 6 channel with a value that is a multiple of the minimum. I mean value of the 1st parameter. In addition, the outputs of all elements of the pa.mti are connected to the inputs of the multi-input element And 7, the output of which, in turn, is connected to the output of the device, to the third control inputs of the three-input element And 5 and through the delay element 8 to the second inputs of the averager 3 l of memory element 4. The operation of the device is as follows. In the initial state, the converter 2 does not work, the averager 3 n memory element 4 is in polloseepn "O, and the output of memory element 4 establishes a prohibiting level for the three input elements And 5 and multi-input element And 7 the latter are closed and no signal is received at the outputs of the device and the indicators 6. In the operating mode, converter 2 is working, and the minimum value of the parameter will correspond to the minimum frequency at the converter output, i.e. the maximum filling time of the averager 3. Let, for example, the sensor Lv (any, for example, N channel) register the smallest, as compared to other N- / sensors, parameter averaged value. Moreover, some other sensors, for example, the first channel, record multiples of the average minimum average values of the parameters. For simplicity, assume that the degree of multiplicity is two. The remaining sensors of channel 1 record arbitrary, not multiple to the average minimum, parameter values. If the nominal averaging times of all averagers 3 are the same, then the signal at the output of the averager Zl is the last to turn up. In this case, the elements 4i, ... 4; ... 4l - 1 of the memory are already stored by the appearance of pulses at the outputs of the averagers B ... 3;, ... that is, they will go to the state "1 and prepare to the opening of the three-input element And 5 on one of the inputs of the multi-input element And 7 on all inputs. Thus, with the appearance of a pulse at the output of the SN averager, the element 4N will also go to the state "1, and the multi-input element AND 7 will work and at its output a signal that will prepare the three-input elements and Zl to work on the second input . Since the pulse duration is much longer than the response time of memory elements 4, the three-input element And 5 will be open through all three inputs and at the output it will receive a signal that will go to the output indicator 6l-. In addition to the three-input element And 5l-, at the same moment the three-input element And 5i will also be open. This is due to the fact that by the time the 3jv averager is filled, the averager 3i will go through two full cycles of filling (multiplicity factor is two): it will be filled, cleared during rerun (the memory element 4 will go to state "1"), will be filled again and refilled instant of refilling of the average Zl due to the multiplicity of parameters. Thus, the three-input element And 5 will open and the signal from its output will go to the indicator 6i. The remaining three-input elements and Ss, .. 5;, .. 5.Y-1 will be closed, because their inputs do not receive permission signals from the outputs of the averagers Зг, ... 3; ..., З.у. After issuing signals to the output of the device and to the indicator, the averagers 3 and the memory elements 4 will, under the influence of the signal from the output of the multi-input element P 7, return to the initial state "O and the operation of the device will resume. The technological feature in the operation of the proposed device is that the memory elements 4 are set to "O on the same signal as the three-input elements AND 5 are interrogated. Since the output potential of the memory element 4 is resolved with some late on the moment of polling of the three-input element 5, which leads to unstable operation of the latter, it is necessary in the reset circuit of averagers 3 and memory elements 4 to provide for delay element 8, for example, a double inverter. The proposed device, in comparison with the known ones, has wider functional capabilities, which allow to determine channel addresses with subharmonics without additional increase in auxiliary control equipment. Formulas of the invention. A multichannel device for selecting the minimum value of the average value, containing in each channel an indicator and a serially connected sensor, voltage-frequency converter, averager, and us element, the first output of which is connected to the input common to all channels of a multi-input element And, characterized in that, in order to expand the class of tasks, it contains a common delay element and in each channel a three-input element And, the first input of which is connected to the output of the averager, the second the move is connected to the first output of the memory element, and the third input is connected to the output of the multi-input element I and to the input of the delay element whose output is connected to the corresponding inputs of the memory elements and averagers, the output of the three-input element I connected to the indicator of its channel, Sources of Information taken into account during the examination: 1.P. S. Yermolov, “Digital Frequency Counters, L., 1973, p. 11. 2. USSR Author's Certificate No. 470814, M. Кл.2 G 06F 15/36, 1974,

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