SU1199684A1 - Device for detecting overheated axle boxes of rolling stock - Google Patents

Abstract

1. A DEVICE FOR DETECTING HEATED TUBES OF MOBILE COMPOSITION containing a track reading camera connected through an amplifier to the first input of the memory block, the second input of which is connected to the output of the wheel pair fixation block and the outputs to the inputs of the comparison block whose output is connected to the input threshold unit, and track sensors, characterized in that, in order to increase the reliability, it is equipped with a unit for determining the velocity of the rolling stock, a code converter and a "digital-to-analog converter, output is connected to the control input of the threshold unit, and the inputs are connected to the converter inputs, the outputs of which are connected to the rolling stock velocity determination unit, the first and second inputs of which are connected respectively to the first and second track sensors (LI and the pass lock fixation inputs wheelset. WITH CO: about 05 00 4ia

Description

2. An apparatus according to claim 1, characterized in that the rolling stock velocity determining unit comprises a time interval generator, a master oscillator, an And element, a pulse counter, a pulse shaper, triggers, and avg. Elements whose inputs are formed the first and second inputs of the block, and the outputs are connected to the inputs of the time interval 84, the output of which is connected to the input of the read pulse shaper and to the first input of the And element, the second input of which is connected to the output of the master oscillator, a. output - with the input of a pulse counter, the outputs of which are connected to the information inputs of the flip-flops, the synchronization inputs of which are connected to the output of the read pulse shaper, and the outputs are formed by the outputs of the block.

The invention relates to railway automatics devices and is intended for contactless automatic detection of overheated rolling stock boxes.

The purpose of the invention is to increase credibility.

FIG. 1 shows a diagram of the device; in fig. 2 is a block diagram for determining the speed.

The device comprises a track reading camera 1, an amplifier 2, a memory block 3, a comparison block 4, a threshold block 5, a code converter 6, a digital-to-analog converter 7, a wheel pair passage fixation block 8, a rolling stock speed detecting block 9, track sensors 10 and eleven.

Block 9 for determining the speed of a rolling stock (Fig. 2) contains a time interval generator 12, a master oscillator 13, an ele- Ment 14, a pulse counter 15, a read pulse shaper 16, comparison elements (not shown), whose inputs form the first and second inputs of the block, and triggers 17.

The output of the track reading camera 1 is connected via an amplifier 2 to the first input of the memory unit 3, to the second input of which the output of the fixation block of the wheel pair 8 is connected. The outputs of the memory block are connected to the inputs of the comparison unit 4, the output of which is connected to the first input of the threshold unit 5 , the second input of which is connected to the output of the digital-to-analog converter 7, the inputs

which are connected to the outputs of the code converter 6, the inputs of which are connected to the speed determining unit 9. The inputs of the speed determining unit are connected respectively to the first and second track sensors 10 and I1 and the inputs of the wheelset aisle fixation unit.

The outputs of the driver 12 temporary

Q interval is connected to the input of the formation 12 of the read pulse and the first input of the element 14, the second input of which is connected to the output of the master oscillator 13, and the output with

5 by the input of a pulse counter 15, the outputs of which are connected to the information inputs of the flip-flops 17, the outputs of which form the outputs of the speed determining unit 9.

Q The device works as follows.

When the first wheelset passes over the sensor 10, the driving generator 13 is turned on and off when

5 passing over the sensor 11. Thus, the number of pulses fixed by the counter 15 is proportional to the speed of movement of the rolling stock. From the outputs of the trigger I7, the speed code is fed to the inputs of the converter 6 codes, and then to the input of the digital-analog converter 7. The voltage from the output of the converter 7 is fed to the control input of the threshold unit 5. Thermal signals

the track plenum 1 is converted into electrical ones, which are then amplified by the amplifier 2 and stored in memory block 3. The recording of signals in memory block 3 is controlled by a block 8 for fixing the passage of the wheelset. After recording the signals. temperatures of about two coceAHtnc bucks these signals are given

to the inputs of unit 4 of the comparison, and then to the input of the threshold unit 5, which form an alarm signal in the presence of an overheated axle box.

Claims (2)

1. A DEVICE FOR DETECTING OVERHEATED BOXES OF MOBILE STRUCTURE, comprising a track reading camera connected via an amplifier to the first input of the memory unit, the second input of which is connected to the output of the block blocking the passage of the wheel pair, and the outputs are connected to the inputs of the comparison unit, the output of which is connected to the input threshold block, and travel sensors, characterized in that, in order to increase reliability, it is equipped with a rolling speed determination unit, a code converter and a digital-to-analog converter, the output of which is connected to the ’control input of the threshold block, and the inputs are to the inputs of the code converter, the outputs of which are connected to the rolling speed determination unit, the first and second inputs of which are connected respectively to the first and second track sensors and inputs of the wheel pair passage fixation unit. FSWTI FIG! 2. The device according to π. 1, characterized in that the unit for determining the speed of the rolling stock comprises a time interval shaper, a master oscillator, an And element, a pulse counter, a read pulse shaper, triggers and elements of interruption, the inputs of which are formed by the first and second inputs of the block, and the outputs are connected to the inputs of the shaper of the time interval, the output of which is connected to the input of the shaper of the read pulse and the first input of the element And, the second input of which is connected to the output of the master oscillator, and ·. output - with the input of the pulse counter, the outputs of which are connected to the information inputs of the triggers, the synchronizing inputs of which are connected to the output of the read pulse shaper, and the outputs form the block outputs.