SU1339452A1 - Device for checking sense of rotation and for measuring angle turn - Google Patents

Abstract

The invention relates to sensors for positioning and directing rotation of mechanical shafts. The purpose of the invention is to increase the reliability of monitoring and measurement in arbitrary modes of shaft rotation. Errors in determining the angular position of the shaft in any modes of rotation are excluded, since the signal at the outputs of the conversion unit (outputs of elements 15, 16) appears only if the conversion blocks (S-inputs of the flip-flops 4, 5, 6) act strictly on the inputs a certain time sequence of signals from sensors 1, 2, 3. 2 Il. (L with with OO with 4 SL GChE

Description

The invention relates to a technique for measuring the position and speed of rotation of mechanical shafts, more specifically to sensors for the position and direction of rotation of mechanical shafts.

The purpose of the invention is to increase the reliability of monitoring and measurement in arbitrary modes of shaft rotation. FIG. 1 is an electrical circuit diagram of the device; in fig. 2 - time diagrams of potentials of some points of the circuit.

The device consists of sensors 1-3, RS-flip-flops 4-6, one-oscillators 7-9, registers 10-12 of shift, logic element OR .13, delay line 14, logic elements AND 15 and 16, reversible counter 17. Elements 4-16 form a conversion unit. The output of each of the three sensors 1-3 is connected to the S-inputs of the corresponding RS-flip-flops 4-6 and one of the R-inputs of the other two triggers. The outputs of the RS-flip-flops 4-6 are connected to the information inputs of the registers 10-12 sdvga and the inputs of one-shot 7-9 through a three-input element OR 13 are connected to the input of the delay line 14, the tap of which is connected to the inverse dynamic recording input to the first cell and to the direct dynamic input shift information of each of the registers 10-12 shift. The output of the delay line 14 is connected to the first inputs of the elements 15 and 16, the second inputs of which are connected to the output of the second register of the shift register 11. The third and fourth inputs of the element And 15 are connected to the output of the third cell of the shift register 12, respectively. The third and fourth inputs of the element And 16 are connected to the output of the third cell of the shift register 10 and the output of the first cell of the shift register 12, respectively. The outputs of the elements 15 and 16 are connected to the addition and subtraction inputs of the reversible counter 17.

Level Log. 1 corresponds to a high voltage level, and a log level. O is a low voltage level (Fig. 2). Diagrams 1–3 potentials of the outputs of sensors 1–3, respectively, diagrams 4–6 are the potentials of the direct outputs of RS flip-flops 4–6, respectively, diagrams 7–9 are the potentials of the input, output, and output of the delay line, respectively, diagrams 10 and 11 are the potentials of the outputs first and third register cells 10

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shift, respectively, chart 12 - the output potential of the second cell of the shift register 11, diagrams 13 and 4 - the potentials of the outputs of the first and third cells of the shift register 12, respectively, diagrams 15 and 16 - the potentials of the addition and subtraction inputs of the reversible counter 17, respectively.

The device operates as follows.

When the shaft rotates, at the outputs of sensors 1-3, the signals of the Log will appear in series. 1, each of which sets RB-triggers 4-6 to one state, respectively, and sets two other RS-flip-flops to the Log state. A. For example, the sensor 1 signal is set to Log. 1 trigger, 4 and in the log state. o triggers 5 and 6, sensor 2 signal to the state of the Log. 1 trigger 5 and in the log state. About triggers 4 and 6. When the shaft rotates in one direction, the state Log. 1 at trigger 4 is set at a period of time t;, - t (Fig. 2). for trigger 5, for the period tj-tj, and for trigger 6, for the period tj-t ,.

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 When the shaft rotates in the opposite direction, the state Log. Trigger 4 is set at a time period, Trigger 5 is set at a period of time, and Trigger 6 is set at a period of time. When a signal appears Log. 1 at the output of the flip-flops 4-6 one-shot, connected to this trigger, generates a single pulse. The set of pulses of all single-oscillators is a sequence of clock pulses that is formed at the output of element 13 and uses dp information shift in the cells of registers 10-12 and for

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5 development of the output signals of the conversion unit,

On the front of each clock im-. pulse information shift occurs. in registers 10-12 in the direction from

0 cells 1 to the cell 3j on the decline of each clock pulse, the state of the trigger is recorded in the first register cell connected to the trigger.

55 Thus, in the period of time t -t, the potentials of the trigger conditions 4, the trigger 5, in the period,

the trigger 6 in the period, on the three inputs of the element 16 and set the potentials corresponding to the state -. m trigger 4 in the period t, -t, trigger 5 in the period tj-tj, trigger 6 in the period. In accordance with the algorithm of the temporal arrangement of the sensor signals, depending on the direction of rotation, in the specified periods of time, the potentials of the trigger appear in the outputs of the triggers. 1, Therefore, in the time period t, -t. for each

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From the three inputs of element 15 or 16, (depending on the direction of rotation of the shaft), the signal Log is received. 1 allowing the passage of a single pulse from the output of the delay line 14 to the corresponding output of the conversion unit. During this period of time, the passage of the pulse through the other element I is blocked by the potential Log. o, coming from another exit register. Errors in determining the angular position of the shaft in any rotational modes are excluded, since the signal at the outputs of the conversion unit (outputs of elements 15 and 16) appears only if the conversion unit (B-inputs of elements 4-6) are strictly defined in time signal sequences from sensors 1-3.

Claims (1)

Invention Formula Device dp of controlling the direction of rotation and measuring the angle of rotation, containing three angular position sensors, a reversible counter, three RS flip-flops, two AND elements, an OR element and a delay line, the outputs of the first and second sensors are connected to the S inputs of the first and second RS -triggers respectively. from 0 5 0 5 o five l characterized in that, in order to increase the reliability of monitoring and measurement under arbitrary rotational modes, three shift registers, three one-oscillators are entered into it, and the AND elements are made with four inputs, the OR element is with three, and the output of the first sensor is connected to the first R- the inputs of the second and third RS-flip-flops, the output of the second sensor - with the first R-input of the first RS-flip-flop rt second H-input of the third RS-flip-flop, the output of the third, sensor - with the S-input of the third RS-flip-flop and the second R- the inputs of the first and second RS-flip-flops, the output of each RS- the rigger is connected to the information input of the corresponding) shift register and the input of the corresponding single-oscillator; the outputs of the single-oscillators through the three-input element OR are connected to the input of the delay line, the intermediate output of which is connected to the inverse dynamic recording inputs and direct dynamic inputs of the shift of each of the shift registers, output the delay line is connected to the first inputs of the elements And, the second inputs of which are connected to the output of the second cell of the second shift register, the third and fourth inputs p The first element And are connected to the output of the first cell of the first shift register and the output of the third cell of the third shift register, respectively, the third and fourth inputs of the second element And are connected to the output of the third cell of the first shift register and the output of the First cell of the third shift register, respectively, and the outputs of the And elements are connected with inputs of addition and subtraction of a reversible counter, respectively. Editor N.Rogulich Compiled by V.Zhuravlev Tehred L.Olkynyk Order 4214/34 Circulation 776. Subscription VNIIPI USSR State Committee Inventions n discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, st. Design, Phage. 2 Proofreader A, Zimokosov