SU1581615A1 - Apparatus for automated inspection of wear-out and shifts of contact wire - Google Patents

Abstract

The invention relates to electric transport, in particular to the maintenance of a contact network. The purpose of the invention is to increase reliability. The device comprises an excitation coil 1 and a series of receiving coils arranged in series on the skid. The length of each receiving coil is selected in accordance with a predetermined measurement accuracy of the displacements, and their number in accordance with the zone of movement along the contact wire wear sensor. Each receiving coil is connected to the input of a corresponding comparator, the output of which controls the displacement detection unit, as well as via OR elements with the same name and adjacent switches, the inputs of which are connected to the corresponding receiving coils, and the outputs via a common bus to the input of the converter. Its output signal, which converts the sum of induced currents in the receiving coil, over which the contact wire is located, and adjacent to it in a voltage, is proportional to the wear and controls the recording unit of the latter. 1 il.

Description

315

The invention relates to an electric vehicle equipped with an overhead wire, in particular to the maintenance of the contact network.

The purpose of the invention is to increase reliability and enhance functionality.

The drawing shows the functional diagram of the device.

The device includes a wear sensor made in the form of a magnetic field excitation coil 1 located on the skid of the current collector

coils 2-7 (for the sake of simplicity, not all receive coils are shown and

other elements of the same type, but only part of them).

Each receiving coil 1-7 is connected to the input of its comparator 8-13, the output of which is connected to the corresponding input of the offset detection unit 14 of the contact wire 15 from the middle of the wear sensor. The output of each comparator 8-13 is also connected through the corresponding elements OR 16-21, respectively, with its switch 22-27. The output of each switch 22-27 is connected by a common bus to the input of the converter 28 of the analog signal, the output of which is connected to the wear register 29.

The device works as follows.

When the AC coil 1 is powered on, a frequency of, for example, 10-100 kHz, an electromagnetic field is created in the receiving wire coils 8-13, which are located at a given distance of the contact wire 15, which induces a alternating voltage of the same frequency in the receiving coils 8-13.

It has been found that in the receiving coils 8-13 in length, for example 50 mm, remote from the contact wire 15 over a distance of more than 50 mm, the induced voltage is less than 2% of the voltage induced in the receiving coil above which contact wire 15. Therefore, the sum of the induced currents in the receiving coil determined by inductive voltages, for example, 4 (if), above which contact wire 15 is located, and in its neighboring (and, i $) with an error less than 2% is equivalent to induced nag

0

five

0

five

five ,,.

 , „

five

is proportional to the wear of the contact wire 15.

The voltage induced in coil 4 exceeds the value of the voltage in adjacent coils 3 and 5 and the reference voltage U№. Therefore, the comparator 10 connected to the coil 4 is triggered. It issues a signal to the displacement detection unit 14 through the elements OR 17-19, opens the switches 23-25. In this case, the currents of the receiving coils 3-5 from the inputs of the switches go to their bus-connected outputs, and the total current is fed to the converter 28. At the output of the converter 28, an analog voltage is applied that is proportional to the wear of the contact wire and comes to wear registration 29.

In the specific example of making the device in accordance with the predetermined values of the displacement of the contact wire from the middle of the skid 1500 mm and the accuracy of measuring the displacement 50 mm length of the excitation coil 1 and a number of receiving coils are selected taking into account

edge effect equal to 1250 mm, and

length of each coil - 50 mm, total

the number of receiver coils is equal to

1250: 50 25.

Device for automated monitoring of wear and displacement of a contact wire, comprising a wear sensor made in the form of a magnetic field excitation coil located on the runner and a receiving coil associated with a wear detection unit, characterized in that in order to increase reliability and expand functionality, it is equipped with additional receiving coils, sequentially located along the runner, a unit for detecting the wire displacement from the middle of the wear sensor, a comparat OR elements, switches, the number of which corresponds to the number of receiving coils, and an analog signal converter, the output of which is connected to the input of the wear recorder and the input to the output of each switch connected by one input to the output of the corresponding OR element, and the other with the output of the corresponding receiving coil and the input

51581615b

a corresponding comparator, with - one neighboring element OR, and this output of each comparator is connected to the third input of the other and corresponding to the first input to the corresponding input of the OR recording unit, the second input of the offset.

Claims (1)

, FORMULA OF THE INVENTION A device for the automated control of wear and displacements of a contact wire containing a wear sensor made in the form of a magnetic field excitation coil and a receiving coil connected to a wear registration unit located on a runner, about t and h Existing with me. in order to increase reliability and expand functionality, it is equipped with additional receiving coils sequentially located along the runner, a unit for detecting wire displacement from the middle of the wear sensor, comparators, OR elements, switches, the number of which corresponds to the number of receiving coils, and a converter an analog signal, the output of which is connected to the input of the wear registration unit, and the input is connected to the output of each switch connected by one input to the output of the corresponding IL element And, with another - with the output of the corresponding receiving coil and the input of the corresponding comparator, the output of each comparator is connected to the first inputs of the corresponding OR element, the second input 1581615 6 of one adjacent OR element and the third input of the other and corresponding to the wookie input of the offset registration unit.