RU1783620C - Translator of one-out-of-three code to one-out-of-four code - Google Patents

Abstract

The invention relates to automation and is intended for train control systems. The invention improves the reliability of the translator. The translator of code 1 of 3 to code 1 of 4 contains the first-fourth AND 1-4 and the first-fifth elements OR 5-9, 1 table, 1 il.

Description

The invention relates to automation and is intended for train control systems.

The closest in technical essence and obtained by using the effect to the claimed one is a code 1 ID 3 translator to code 1 of 4, containing triggers, each of which is made of two AND and OR elements, the output of each of the trigger elements being connected to the first output of another element, the outputs of the AND elements of the first and second triggers are connected respectively to the first and second outputs of the translator, the third input of the translator is connected to the second inputs of the elements of the third and fourth triggers, and the OR element (1). However, this device has a relatively low reliability, since its circuit is quite complex.

The purpose of the invention is to increase the reliability of the translator by simplifying it.

The drawing shows a functional diagram of the translator code 1 of 3 to code 1 of 4.

The device contains the first to fourth elements AND 1-4, the first to fifth elements OR 5-9. In the drawing, the numbers 10-12 indicate the first to third inputs of the translator, respectively, the numbers 13-16, respectively, the first to fourth outputs of the translator.

The operation of the translator is described by a table in which the first state in the first clock is taken as the initial one.

The table lists all the possible states of inputs 10-12 (input words), the corresponding states of the outputs of elements 5-8 OR and outputs 13-16 devices (output words) when the input words correspond to the law of their formation, that is, the presence of input combinations signals of only one unit of three and the absence of malfunctions in the circuit of the device itself.

In this case, bars 8 and 9 correspond to another variant of the transition of the translator from state (2) to state (3), and bars 10 and 12 correspond to another variant of the transition from state (4) to state (1). A translator has the property of checking compliance with the law of generating input words. For example, if on

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Inputs 10 ... 12 of the translator receive the word 000 (code O from 3), then at its outputs 13-16 the word 0000 will be generated (code O from 4). If the word 101 (code 2 of 3) is supplied to the same inputs, then the word 0110 (code 2 of 4) will be generated at the outputs of the translator. The translator also has the property of self-checking, i.e. any single malfunction of its elements can be detected by a change in the weight of the output word on one or more sets of input code 1 id 3rd. For example, a malfunction constant 0 of the first input of the translator will be fixed in one of the cycles 1, 4 or 7 (see table), since the word 0000 will be generated at the outputs 13 ... 16 of the translator. Fault constant 1 of the same input will be recorded in measures 3, 6, 8 or 10, since in this case words containing two units of four will be observed at the outputs of the translator. The malfunction constant 0 of the second input of element 1 And the translator will be detected in any of the cycles 4, 5 or 9, since in this case the word 0000 will be generated at the outputs of the device. The malfunction constant 1 of the same input of element 1 And can be fixed at 3, 6, 8 or 10 measures, as at outputs 13.,. 16 of the translator, words that do not belong to the plurality of words of code 1 and will be generated. 4. The malfunction constant 0 of the output of element 1 And it will be fixed in one of the cycles 4, 5 or 9, since in this case the word 0000 will be formed at the outputs of the translator. The malfunction of the constant 1 of the output of the same element can be fixed on one of

sets 1, 2, 3, 6, 7, 8, 10 or 11, since in this case a word will be generated at the outputs of the translator that does not belong to the set of words of code 1 of 4,

Claims (1)

SUMMARY OF THE INVENTION A code translator 1 of 3 to a code 1 of 4 containing AND elements and OR elements of the outputs of the first, second, third and fourth AND elements connected to the first inputs of the same OR elements, the outputs of which are connected to the first inputs of the same AND elements, the second input the first element AND combined with the second the input of the second element And, the second input of the third element And is combined with the second input of the fourth element And, the outputs of the first and fourth elements And is respectively the first and second outputs a translator, characterized in that, in order to increase the reliability of the translator due to its simplification, the output of the fifth OR element is connected to the second input of the first And element, the second input of the first The OR element is connected to the output of the third And element and is the third output of the translator, the second input of the second OR element is connected to the output. The fourth And element, the second input of the third element OR is connected to the output of the second AND element and is the fourth output of the translator, the second input of the fourth element OR is connected to the output of the first AND element, the first and second inputs of the fifth element OR are respectively the first and second inputs of the translator, the second input of the third AND element is the third input of the translator. Table continuation