SU1267258A1 - Device for checking rotational speed of shaft of working mechanism - Google Patents

Abstract

The invention relates to instrumentation engineering and makes it possible to improve the accuracy of control of the moment of decreasing rotational speed. When the rotational speed decreases, the time interval between the signals of sensor 1 increases, while the information recorded in register 9 is shifted by a greater number of cycles. The information is shifted until a signal appears on the switch-on actuator connected by switch 10 to block 4 3 output register 9, This signal, indicating an unacceptable reduction in the speed of rotation, is used-. S is to disable actuator 3. 1 ip. (L

Description

I: D) Brillee refers to (1l-o-measuring technology, namely, to devices for controlling the speed of rotation of a shaft, using a white-handed mechanism).

The purpose of the invention is to improve the accuracy of control of the moment of decreasing rotational speed,

The drawing shows: a block diagram of the proposed device.

The device contains a tachogenerator made in B1 1 of the sensor 1 signal and the code disk 2 mounted on the shaft of the actuator 3, unit 4 activating actuator 3, driver 5 pulses reference generator 6 trigger 7 element 8, shift register 9, switch 10 and driver 11 pulses.

The formers of 5 and 11 pulses are made in the form of single vibrators,

The device works as follows.

When block 4 is turned on, the shaft of the actuator 3 and the code disk 2 are rotated, while sensor 1 generates a signal which rises to the input of the record of the shift register 9 | and simultaneously on the drivers 5 and 11 pulses. From the output of the former 11, the register information is reset 9, and from the output of the imaging unit 5, the flip-flop of the trigger 7 to the state in which the pulses of the reference generator 6 are allowed to pass through the AND 8 element to the register shift bus 9, and the signal from the write bus is transferred to the register I then with each new pulse of the reference generator, it is transferred to the next cell of the shift register 9, with each new signal from sensor 1 resetting information in register 9 with the subsequent recording of the sensor signal in reg

gistr 9 and displacement (shear) along

register 9 is repeated.

When the rotational speed decreases, the time interval between the signals of sensor 1 is increased, and the information recorded in register 9 is shifted by a greater number of ticks. The information is shifted until a signal appears at the output of register 9 connected by switch 10 to block 4. This signal is an indication of an unacceptable reduction in the rotational speed. 5 It is used to disable actuator 3,

Claims (1)

Invention Formula A device for controlling the speed of rotation of the actuator shaft, containing a tachogenerator, the code disk of which is fixed to the actuator shaft, and a signal sensor through the first pulse shaper connected to the trigger input, Element I, one input connected to the trigger output, the reference generator, second pulse shaper and an actuator activation unit, characterized in that, in order to increase the accuracy of monitoring the moment of rotational speed reduction, it is equipped with a shift register and The switch has positional contacts which are connected to the bit outputs of the shift register, and a common contact is connected to the input of the actuator switch-on unit and to the installation input of the trigger, while the reference generator is connected to another input of the element I. And the output of the element I A tachogenerator signal transmitter is connected to the input of the record of the shift register and to the input of the second pulse shaper, the output of which is connected to the reset bus of the shift register.