SU1379167A1 - Apparatus for detecting overheated axle boxes of rail vehicles - Google Patents

Abstract

The invention relates to railway automatics devices and relates to the construction of floor equipment of a device for detecting overheated railway axle boxes. The purpose of the invention is to improve noise immunity. A device for detecting overheated rolling stock of a rolling stock contains a thermal radiation receiver 1 (a bolometer), the body of which is mounted on a ball joint 2. The hinge 2 is mounted on a base in the path. One end of the lever 3 is attached to the receiver body, the other end of which is connected through an eccentric gear 4 with the drive 5 of the electric motor. The lever 3 and the eccentric gear 4 form an orienting device. 2 Il.

Description

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The invention relates to railway automatics devices and relates to the construction of floor equipment of a device for detecting overheated railway axle boxes.

The purpose of the invention is new noise immunity.

FIG. 1 schematically shows the proposed device; in fig. 2 is a drive control block diagram.

A device for detecting the overheated rolling stock of the rolling stock contains a thermal radiation receiver 1 (a bolometer), the body of which is fixed in the njapoBOM hinge 2. The hinge 2 is mounted on the base of the track. One end of the lever 3 is attached to the receiver body, the other end of which is connected through an eccentric gear 4 with the drive 5 of the electric motor. 3 and eccentric gear 1 form an orienting device. The drive control block 6 is connected to the output of the preamplifier 7 connected to the output of the receiver 1. The drive control block 6 comprises a series-connected threshold element 8, an amplifier 9 and a switch 10 connected to the drive 5.

The device works as follows.

According to a certain program (before the passage of the train), the center of the top of the camera is opened, with this, the receiver of thermal radiation 1 (bolometer) “looks at the sky. If the sun is in sight, the output of receiver 1 is turned on by a signal, which is amplified by preamplifier 7 and fed to control unit 6, which actuates drive 5. Electric drive 5 turns eccentric gear 4 by 90 °, after which it turns off. The eccentric gear is connected to the housing of the bolometer 1 by the lever 3 so that when it is rotated 90 °, the housing (optics) of the bolometer 1 changes its orientation by an angle equal to the maximum viewing angle of receiver 1 (5 °). Thus, the receiver 1 "turns away from direct sunlight, and in the new position (with the new optics orientation) the thermal signals are read from the axle boxes of the passing train, after which the curtain of the floor camera is closed.

Such operations are performed before each train. If the sun orientally appears in the field of view of the bolometer 1, the same reorientation process occurs, only in this case the polarity is switched and the drive 5

turns the eccentric gear to the same 90 °, but in the opposite direction (to its former position), where there is no sun at the moment. The activation of the drive 5 of the block m. 6 control takes place as follows. The signal (from the sun) from the bolometer 1 is amplified by the pre-amplifier and is fed to the first input of the threshold element 8 of the control unit 6. The second input of the threshold element is supplied by a reference voltage, which in its level is slightly lower than the signal voltage level, removed in the same way from the sun with its minimum radiation activity. From the output of the threshold element, the signal goes through the amplifier 9 to the commutator 10, which actuates the drive 5, and the signal for switching on is necessary for the first moment, then electric power is supplied to the electric drive through a parallel channel, provided in the switch.

In the existing orientation of the outdoor chambers in the country to the rear wall of the housing of the axle box, the indicated displacement (change of the orientation angle)

5 in the horizontal plane, with a distance from the center of the optics to the axle box (1200 mm), does not exceed 105 mm (1200 x tg5 °), which is within the gating pulse (the distance between the wheelset sensors), equal to 500 m. m, and does not cause

0 the need to reconfigure the instrument's receiving and amplifying tract, and, consequently, does not lead to any additional conditions. The arrangement of a bolometer optics in a vertical plane also does not cause

5 additional cabinets, since the optics still scans the entire rear wall of the housing of the axle box from bottom to top.

Claims (1)

Invention Formula A device for detecting overheated rolling stock of a rolling stock, comprising a thermal radiation receiver mounted on the track, an orientation device associated with it, and an actuator connected to the control unit, characterized in that, in order to increase the protection value, the orientation device contains levers and eccentric transmission, the thermal impedance receiver housing is connected to the base m. There is one end of the lever, the other end of which is connected via an eccentric transmission with a drive. C1} ig.g