SU637791A1 - Indicator of electromagnetic mechanism armature position - Google Patents

Description

(54) ANCHOR POSITION ALARM SIGNAL

ELECTROMAGNETIC MECHANISMS

This impulse consists of three threshold elements 10, П, 12, a capacitor 13 and a differentiating chain I.

The device works as follows. The pulses produced by the generator 1 through the cut-off diode 2, the winding of the electromagnetic mechanism 8 n transformer 3 (serves to galvanically unplug the measuring circuit with the mains) is fed to the input of the comparator 4 and to the input of the former 7, the pulse amplitude on the secondary winding of the transformer 3 depends on the value of inductance winding 8 of the electromagnetic mechanism, which is determined by the position of its core.

When the core is fully retracted, the inductive resistance of the winding is maximum, and the amplitude of the pulses on the secondary winding of transformer 3 (Fig. 2, a) is minimal and less than the reference voltage applied to the second input of the comparator 4. At the same time, the output of the comparator 4 is the signal "1 ( Fig. 26): The response voltage of the threshold element W is chosen to be less than the minimum amplitude of the pulses on the secondary winding of the transformer 3, therefore, the element 10 is triggered by each pulse arriving at its input. When element 10 is triggered, the voltage at its output (Fig. 2c) increases exponentially. As soon as the voltage across the capacitor reaches the trigger threshold of element II (voltage U,} on fng. 2), the output of the latter appears as "1" (Fig. 2g). This signal through the differentiating circuit 4 is fed to the input of the threshold element 12, from the output of which the strobe pulses (Fig. 2e) are fed to one of the inputs of the circuit 5 (circuit AND –NE). Since the signal "S" arrives at the second input of circuit 5 from the comparator, a positive voltage drop is formed at the output of circuit 5 at the output of this circuit (Fig. 2 g), with which trigger indicator 6 is held in state O (Fig. 2 h).

. As the electromagnet core moves downward, the inductive resistance of its winding decreases, and the amplitude of the pulses on the secondary winding of the transformer increases. As soon as the amplitude of these pulses is d (ktignet threshold (ti on

FIG. 2), the comparator is transferred to the state "O. A positive voltage drop at the input of the comparator 4 acts on the first input of the trigger indicator 6 and throws it into the state "1. The appearance of the signal “O at the input of logic circuit 5 prevents the passage of strobe pulses from the output of element 12 to the second input of the trigger. Therefore, the signal "1 at the input of trigger b is maintained until a pulse with an amplitude less than

than the voltage DC of operation of the comparator 4 (g in Fig. 2). The change in the reference point coordinate is made by adjusting the voltage Vc.

Claims (2)

Invention Formula Electromagnetic box position detector, containing a carrier frequency generator, connected via a diode and a transformer to the electromagnetic winding and an output trigger indicator, characterized in that, in order to improve the position signaling accuracy, a comparator with a source of reference signal is added to the detector, the second input which is connected to the secondary winding of the transformer, and the output - to the first input of the trigger indicator, and the gate driver, whose input is connected n to the secondary winding of the transformer, and the output -. a NAND circuit, a second input of which is connected to the output of the comparator, and an output - to a second input latch indicator. Sources of information taken into account in the examination: I. Setekov B.S. Basics of the calculation and design of electromagnetic elements of automatic and telemechanical devices. M.-- L., 1965, p. 250-470. 2. USSR author's certificate No. 516020, cl. G 05 B, 23/02, 1975. LH Ы1Нг1 ± Rimmttt I I I GPT tt ta t V ef t Wi i and I I. li M and bttllt ttt  k k yr to