SU404109A1 - SHAFT ROTATION SPEED SIGNALIZER - Google Patents

Description

one

The invention relates to rotary speed sensors of gas pumping units operating from a frequency sensor for use in an automatic monitoring and control system.

A shaft speed indicator is known that contains a first trigger, one of the inputs of which is connected via a switch to a timing bridge, the output of which is connected to the input of a null organ, the first and second coincidence circuits, a one-shot and the second and third triggers.

The proposed shaft speed indicator differs from the known fact that the inputs of the third trigger are connected to the outputs of the matching circuits, one of the inputs of each matching circuit is connected to the one-shot output, another input of each matching circuit is connected to the output of the second trigger, the one-shot input is connected to one of the first outputs trigger, the other input of which is connected to one of the inputs of the second trigger, the other input of which is connected to the output of the null organ.

This makes it possible to increase the reliability of the detector.

The shaft speed indicator is shown in the drawing.

It contains the first trigger-forming device 1, the key 2, the time specified by the power-3, the null-organ 4, the second control trigger 5, the matching circuits 6 and 7, the one-shot 8 and the output trigger 9. The signal from the sensor whose frequency is proportional to the rotation speed

the controlled shaft enters the trigger generator for conversion to rectangular pulses. From one arm of the trigger, the signal is fed to the key 2 and to one input of the trigger 5 of the control. Key 2

serves to discharge the capacitor time of the master bridge 3, formed by three resistors and capacitance. With key open 2, the capacitance time of the driver bridge is charged from a constant voltage source.

E through the resistance R. In the diagonal of bridge 3 a bullet-orgap 4 is turned on, which outputs a signal to the second input of control trigger 5 only if the voltage UK on the capacitance C during the pulse has time to charge

UK, formed by dividing the voltage E with the shoulders of the bridge. Control trigger 5 applies a voltage to one of the cascades of coincidence 6 and 7. From the other arm of the Tpin-generator-former 1, the signal goes to

one-shot 8. The output pulse of the single-shot 8 through the matching cascade, to which the voltage from control trigger 5 is applied, goes to the output trigger 9. The state of the output trigger 9 is determined by the single-pulse pulse passing circuit 8, when the rotation speed of the shaft is lower than the specified pulses from the single-slot 8 through the coincidence circuit 7, it arrives at the output trigger 9, and it is in a single steady state. If the shaft speed is higher than the specified pulse from the one-shot 8 through the coincidence circuit 6, it arrives at the output trigger 9, and it goes into another steady state. The subject of the invention The speed indicator of the speed of the shaft, containing the first trigger, one of the inputs of which is connected by time with the key, is connected to the bridge, the output of which is connected to the zero-organ input, the first and second coincidence circuits, the one-shot and the second and third triggers differing By the fact that, in order to increase its reliability in operation, the inputs of the third trigger are connected to the outputs of the matching circuits, one of the inputs of each matching circuit is connected to the one-shot output, the other input is connected to the output of the second rigger, the monostable input connected to an output of the first flip-flop, the other output of which is connected to one of the inputs of the second flip-flop, the other input of which is connected to the output zero-organ.

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