SU98998A1 - Device for detecting breakages of the wires - Google Patents

Description

The subject matter of the invention is a ycTpoiicxBO for determining the breaks in the cores of insulated wires, which consists of a high-frequency generator for switching to the test wire, a capacitive sensor through which the test wire passes, and a break indicator connected to this sensor. The use of such devices to determine the hidden wire breakage during its winding is prevented by the presence of a sliding contact between the test wire and the break indicator, as well as a change in inductance (in the form of a winding roll included in the device circuit) of the wire to be tested. To ensure reliable control in conditions where the inductance of the circuit of the monitored wire varies (for example, under winding conditions), it is not necessary to use a second capacitive sensor that serves to connect the high-frequency generator to the wire. An electronic relay can be used as a break indicator in the device.

The drawing shows a circuit diagram of the device.

The principle of the device is based on the frequency of high-frequency electrical oscillations from one part of the circuit to another using capacitive coupling formed between the special plates 1 and the test wire 2, when it is broken, the capacitive coupling is broken, causing changes in the operation of the device. High-frequency alternating current, obtained from the generator assembled by the three-point scheme on lamp 3 (6A7, 6SA7), passage through the capacitance plate-wire-plate, ponad on the left side of the double triode 4 (6N9), working as quality No. 98998-2 -

ve detector (anode and grid connected to each other). As a result of detection on the cathode resistance 5 of the left side of triode 4, a constant hope voltage is formed, which minus is applied to the grid of the right half of the same lamp included in one of the shoulders of the bridge circuit. Three other arms are formed by two resistances 6 (50 clods each) and a potentiometer 7.

The bridge of the bridge diagonal includes a polarized relay 8 winding. The bridge scheme is connected so that, if there is an offset on the grid of triode 4 (lamp polocon rights), the current through the relay winding is zero. Relay anchor, pahod in left no.1o kenpi. closes the circuit of green lamochka 9, indicating that there is no breakage of the test wire. At the time of the break of the test wire between the two plates 1, the capacitance of the connection is broken, and high-frequency electrical oscillations do not fall on the detector. The load of the detector sharply impresses the value of the constant voltage, which is the actual displacement on the grid of triode 4. The bridge circuit is unbalanced and the current 8 starts to flow through the winding of the relay 8. At the same time, the measles relay is transferred to the other side and closes the circuit of the red light bulb 10, indicating a break in the wire. One can turn off the machine with a specially installed switch that is triggered by a relay 8 relay. After removing a wire breakage by pressing button 11, the winding circuit, the relay and its measles will return to the left position, which lights a green light. The power of the po1131) device is monitored from the 12 (6X5) assembled on the lamia wntel.

Invented

Claims (2)

1. A device for detecting the break of the cores of insulated wires, consisting of a high-frequency generator for connecting to the test wire, a capacitive sensor through which the test wire passes, and an indicator of the break connected to this sensor, in order to ensure reliable control in conditions when the inductance value counter. The wire to be changed varies (for example, under winding conditions), a second capacitive sensor, a digital sensor, is used to connect the pointer generator to the wire. 2. In the device according to claim. 1, the use of an electronic relay as a break indicator.