SU1472301A1 - Device for detecting vehicle wheels slip - Google Patents

Abstract

The invention relates to a blocking device for railway wheels. The purpose of the invention is to improve accuracy. The device contains a frequency sensor 1 installed on the wheel axis, a reversible counter 2, a counter 3, a polling unit 4 and a comparison unit 5. The reversing counter 2 records the speed measured by the counter 3. In a reversible counter, the velocity difference is calculated over two consecutive intervals, which in block 5 comparisons are compared with the allowable value, above which a signal indicating the presence of blocking appears at the output of block 5. The polling unit provides the speed measurement mode and synchronous operation of the device components. 2 Il.

Description

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FIELD OF THE INVENTION The invention relates to railway transport, in particular to rolling stock protection devices.

The purpose of the invention is to improve accuracy.

FIG. 1 is a block diagram of a device for detecting a wheelhouse of a vehicle; in fig. 2 - a functional block diagram of the survey.

A device for detecting the undercarriage of the wheels of a vehicle contains a frequency sensor G of the speed of rotation of the wheel, to the output of which the subtractive input of the reversing counter 2 and

Chica 1 records the speed of the wheel. At the moment when the first interval ends, the speed measured by counter 3 is recorded in the reversible counter 2, the counter 3 is reset to zero, and the signal from the third output of the polling unit 4 simultaneously with the measurement of the speed in the second time interval, the counter 3 calculates the speed difference

. | Q for two consecutive and equal in magnitude time interval. After the end of the second time interval, the signal from the outputs of the reversible counter 2, proportional to the acceleration of the wheel, is compared in comparison block 5 after the arrival of the signal input of counter 3, the reset input of the terminal 15 from the second output of block 4 from the access control is connected to the first output acceleration level. If valid

4 polls, and the output - to the installation input-level acceleration will be exceeded, then

a reversible counter 2, connected to the output of the block 5, according to the signal, indicated by one of the adjustments about the occurrence of blocking. Block 4

unit 5 comparison, other polling installation jn provides a measurement mode whose inputs are intended for connecting and synchronous operation of blocks, therefore

In the subsequent outputs, the synchronization input is connected to the second output of the polling unit 4, to the third output of which the synchronization input of the reversing counter 2 is connected.

The polling unit 4 consists of a pulse generator 6 connected in series (Fig. 2) and one-shot 7-9, the outputs of which are respectively the first.

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Claims (1)

intervals are similar to those considered. Invention Formula A device for detecting the blocking of vehicle wheels, containing one of the counters, connected by a subtracting input to the output frequency the third and second outputs of the polling unit, n wheel speed sensor, and the output - to The device operates as follows: a comparator input input, characterized in that, in order to increase accuracy, it is provided with a polling unit and an additional counter, the counting input of which is connected to the output frequency zom. The generator 6 (Fig. 2) at equal intervals triggers the one-shot 7, which in turn starts the single-installation input of the comparison unit, characterized in that, in order to improve accuracy, it is equipped with a polling unit and an additional counter, the counting input of which is connected to the output frequency vibrator 8, from which one 5 sensors are launched, the output is to the installation input vibrator 9. At the output of block 4 (Fig. 1) of the poll, three short consecutive pulses are generated. In the time interval specified by the generator 6, into the counter 3 by the number of pulses from the frequency data point of the counters, and the reset input to one of the outputs of the polling unit, the other outputs of which are connected to the synchronization inputs of one of the counters and the comparison unit. Chica 1 records the speed of the wheel. At the time of the end of the first interval, the speed measured by counter 3 is recorded in the reversible counter 2, the counter 3 is reset to zero and the speed difference is calculated by the signal from the third output of the polling unit 4 simultaneously with the speed measurement in the second time interval by counter 3 for two consecutive and equal in magnitude interval of time. After the end of the second time interval, the signal from the outputs of the reversible counter 2, proportional to the acceleration of the wheel, compares 25 intervals are similar to those considered. Invention Formula A device for detecting the blocking of vehicle wheels, containing one of the counters, connected by a subtracting input to the output frequency wheel speed sensor, and the output - to The installation input of the comparison unit, characterized in that, in order to increase accuracy, it is equipped with a polling unit and an additional counter, the counting input of which is connected to the output of the frequency sensor output - to the installation input sensor output - to the installation input one of the counters, and the reset input to one of the outputs of the polling unit, the other outputs of which are connected to the synchronization inputs of one of the counters and the comparison unit.