SU41024A1 - Device for measuring DC rail circuits from a moving train - Google Patents

Description

The proposed device is intended to measure the strength and direction of direct current in a track circuit from a moving train.

The invention consists in the fact that in order to make measurements without direct connection to the rail circuit by means of a frame located on the train and connected to a measuring instrument used to determine the current strength in the rail circuit, an iron rotor rotating at a constant speed is located in this frame designed to excite in it a current proportional to the magnetic flux formed by the passage of direct current on the rails.

The entire device, as seen from the drawing, is placed on a mobile railway unit and consists of a vertical shaft O driven by an engine M with a stabilized speed; iron measles P and CR, playing the role of rotors for alternators, are fixed on the shaft.

Over railroad rail

(459)

The frame of the EUT, which is fixedly attached to the car, is located, which is intersected by the magnetic flux formed by the passage of a constant current along the rails. With the rotation of the rotor. P this magnetic flux intersecting the frame of the EUT varies in magnitude, why an alternating current of a frequency corresponding to the rotor number P is induced in the latter.

The alternating current from the EUT frame is fed to the amplifier Y and passes through the filter K, passing only frequencies corresponding to the rotor speed P. The purpose of the filter K is to separate extraneous currents that can be induced in the EUT frame and without rotation of the rotor P, if not There is some kind of pulsation in the track circuit. From the filter K, the current flows to the measuring device A (normal or recording).

Measuring instrument A, measuring alternating current, is graduated in amperes of direct current passing through the track circuit.

To determine the direction of the direct current, stationary polarized electromagnets are located under the second rotor of the RS, which are polarized by direct current through the excitation winding of the OF. On the cores of the same electromagnets, the winding of the ICE is superimposed. When the rotor of the RS is rotated in the winding of the IC, an alternating current is induced which coincides in frequency with the current obtained from the HO frame, since the rotors of the RS and P are located on the same axis. On the other hand, the current generated by the I.C. coil relative to the phase of the current generated by the HO frame will depend on the direction of the excitation flow. If the polarizing electromagnets of PE are always given the same polarity, then, depending on the direction of current flow along the track circuit, the phases of the currents generated by the ICO and IO coils will either coincide or be opposite. The phase comparison is made by a phase meter F, according to which it is possible to judge the direction of the current in the track circuit.

The subject matter of the invention.

Claims (2)

1. A device for measuring DC rail circuits from a moving train using a frame placed on the last, connected to a measuring device used to determine the current strength in the rail circuit, characterized in that the current proportional to the magnetic field is excited in said IO frame the stream formed by the passage of direct current along the rails, it is located at a constant speed rotating iron rotor I 2. The form of the device according to claim 1, characterized in that, in order to determine the direction of the current in the track circuit, the rotor of the RC, located above the stationary polarized PE electromagnets, is fixed on the same axis with the rotor P current. coinciding in frequency with the current obtained from the scope of the EUT.