SU1157667A1 - Pulse shaper - Google Patents

Abstract

PULSE FORMER, containing a three-phase input signal sensor, a threshold element, a dual key and an RS flip-flop, the inputs of which are connected to the dual-phase paraphase outputs, characterized in that, in order to improve the speed of the pulse generator by retrieving information during 1/3 of the rotation period sensor, it additionally introduced two threshold elements, two twin keys. two RS flip-flops, three AND gates and an OR gate, the first inputs of the first, second and third dual keys are connected to the corresponding phases of the three-phase sensor, and their second inputs are connected via the corresponding threshold element to the second, third and first phases of the three-phase sensor, respectively , direct and inverse outputs, respectively, of the second and third dual keys are connected to inputs S and R of the respective RS flip-flops, direct outputs of the first and second, second and third, first and third tr The IGs. Rows are connected respectively to the inputs (L dami of the first, second, and third elements AND, whose outputs through the OR element are connected to the output of the pulse former.

Description

sd

Od The invention relates to a pulse technique and to be used in automation and computer devices. A pulse shaper is known which contains a three-phase input signal sensor with a power source and a PZ trigger. However, this driver has a low noise immunity. Closest to the invention is a pulse shaper comprising a three-phase input signal sensor, a threshold element, a dual key, and an RS flip-flop, the inputs of which are connected to the dual-phase param- eters of the dual key .2. A disadvantage of the known pulse shaping, especially when it is used in the frequency measurement system (or speed) of rotation of the Three Phase Sensor, is low speed because one output pulse is formed per revolution of the sensor. The aim of the invention is to increase the speed of the pulse former due to the information for 1/3 of the rotation period of the sensor. The goal is achieved by the fact that a pulse shaper containing a three-phase input signal sensor, a threshold element, a dual key and an RS flip-flop, the inputs of which are connected to the paraphase outputs of a dual key, additionally introduced two threshold elements, two dual keys, two RS flip-flops, three the logical element AND and the logical element OR, the first inputs of the first, second and third dual keys are connected to the corresponding phases of the three-phase sensor, and their second inputs are connected through the corresponding pores The pitch element with the second, third and first phase of the three-phase sensor, the direct and inverse outputs of the second and third dual switches, respectively, are connected to the inputs S and R of the corresponding RS-flip-flops, the first outputs of the first and second, second and third, first and third the flip-flops are connected respectively to the inputs of the first, second and third elements AND, the outputs of which through the OR element are connected to the output of the pulse former. On fif. 1 is a functional diagram of a pulse former; FIG. 2 - time diagrams of work. The pulse shaper contains a three-phase sensor 1 input signal, the threshold elements 2-4, dual keys 5-7 and RS-flip-flops 8-10, the inputs of the trigger 8 are connected to the paraphase outputs of the dual key 5, three logical elements And 11-13 and logical element OR 14. The first inputs of the first, second and third dual switches 5-7 are connected to the corresponding phases of the three-phase sensor 1, and their second inputs are connected through the corresponding threshold element 2-4 to the second, third and first phases of the three-phase sensor 1, direct and inverse, respectively. output The second and third dual keys 6 and 7, respectively, are connected to inputs S and R of the respective flip-flops 9 and 10, the direct outputs of the first and second, second and third, first and third flip-flops 8-10 are connected respectively to the inputs of the first, second and third. elements And 11-13, the outputs of which through the element OR 14 are connected to the output of the pulse shaper. Impulse shaper work, em follow cim way. The signals from the three-phase sensor 1 (Fig. 2 a, S, b) are fed through the threshold elements 2-4 to the inputs of the dual switches 5-7. When the input signal has a positive polarity, exceeding the trigger level of threshold elements 2-4, a pulse is generated at the forward output of dual keys 5-7, three negative polarities of the input signal, exceeding the trigger level of threshold elements 2-4, a pulse is formed at the inverse output twin keys 5-7. With a zero input signal, as well as with signal dips from loss of contact of the contact lamellae of sensor 1, all; the keys are locked. The signals from the paraphase outputs of the dual keys 5, 6 and 7 arrive at the installation inputs of the RS-flip-flops 8-10, ensuring their transfer to the front of the positive and negative pulses. t At the output of the RS-flip-flops 8-10, rectangular pulses are generated on

31

the frequency of rotation of the three-phase sensor 1 (Fig. 2, and, ".) shifted by 120 relative to each other. As a result of pairwise comparison of the output signals of the RS-flip-flops by 8-10 logical elements AND 11-13 and their summation at the output of the logical element OR 14 are formed directly.

carbon pulses at triple frequency of rotation of sensor 1 (fig. 2l).

Thus, the pulse shaper provides for the formation of 5 square-wave pulses at the tripled frequency of rotation of the sensor, which will allow measuring the speed for one third of the period.

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FIG. 2

Claims (1)

A PULSE FORMER containing a three-phase input signal sensor, a threshold element, a dual key and an RS trigger, the inputs of which are connected to the paraphase outputs of the dual key, characterized in that, in order to increase the speed of the pulse shaper by collecting information for 1/3 of the sensor rotation period , two additional threshold elements, two dual keys, two RS-flip-flops, three logical elements AND and a logical element OR, are introduced into it, and the first inputs of the first, second and third dual keys are connected to the corresponding phases of the three-phase sensor, and their second inputs are connected through the corresponding threshold element to the second, third and first phases of the three-phase sensor, respectively, the direct and inverse outputs of the second and third dual keys, respectively, are connected to the inputs S and R of the corresponding RS flip-flops, the direct outputs of the first and the second, second and third, first and third triggers are connected respectively to the inputs of the first, second and third AND elements, the outputs of which through the OR element are connected to the output of the shaper and pulses. SU ... 1157667> 1 1157667