RU1799775C - Train speed control device - Google Patents

Abstract

Use: to control the speed of a train. SUMMARY OF THE INVENTION: a device comprises a speed sensor, a pulse signal control unit, a direction determining unit, a mixer, a pulse counter, a comparison element, a digital comparator, a frequency multiplier, two input signal converters from a frequency multiplier, a delay element, a controller zero position sensor, input signal generator, converter operation control unit, executive unit. 1 ill.

Description

The invention relates to the field of railway transport, in particular to train safety systems.

The purpose of the invention is to increase reliability.

The invention is illustrated in the drawing, which shows a block diagram of a device.

The device for monitoring the speed of movement comprises in series a speed sensor 1, a pulse signal control unit 2, a direction determination unit 3, a mixer 4, a pulse counter 5., a comparison element 6, a digital comparator 7 and a frequency multiplier 7.

In addition, the device includes the first 9 and second 10 input signal converters, the first inputs connected to each other and to the output of the frequency multiplier 8, the second inputs to each other and to the output of the delay element 11, the input of which is connected to the output of the sensor 12 zero the position of the controller, and the third inputs are between themselves and with the output of the input signal generator 13. The input of the input signal generator 13 is connected to the output of the converter operation control unit 14. The first output of the first 9 input signal converter is connected to the input of the executive unit 15, the second output and output of the second 10 input signal converter is connected respectively to the first and second inputs of the converter operation control unit 14, and the third is connected to the second input of the mixer 4. The device includes a selection block 16 controlled speed, the first and second outputs of which are connected

x | Yu h)

h

41, respectively, with the second inputs of the comparison element 6 and the digital comparator 7.

The motion voltage detecting unit 3 is made on the basis of an lK-trigger, the inverter operation monitoring unit 14 is similar to a rectifier element, and the controlled speed selection unit 16 is on contact elements.

The device operates as follows.

When moving from the train, the signal of the sensor 12 of the controller's zero position through the delay element 11 is fed to the second inputs of the first 9 and second 10 input signal converters. At the same time, the pulse signals from the speed sensor 1 are sent to the pulse control unit 2, the output of which is a low pulse signal the frequency that arrives at the input of block 3 and when the sequence of pulses coincides with the selected direction of motion, a low-frequency pulse signal appears at the output of block 3, which the first goes to the first input of the mixer 4, the second input of which from the output of the generator 13 of the input signal through the first 9 converter of the input signal receives a high-frequency pulse signal, this signal also goes to the third input of the second 10 converter of the input signal

A high frequency signal is generated in the presence of inverse signals c. the second output of the first 9 and the output of the second 10 input signal converters, which are respectively supplied to the first second inputs of the converter operation control unit 14, the output signal of which is input to the input signal generator 13 and turns it on. Otherwise, the signal at the output of block 14 disappears and the generator 13 disrupts the failure of the oscillation. The high-frequency signal from the output of mixer A goes to the input of pulse counter 5, the output of which is an electric signal in the form of a binary code corresponding to the number of pulses arriving at its input. From the control speed selection unit 16, electrical signals are supplied to the second inputs of the comparison element 6 and the digital comparator 7 in the form of a binary code, respectively, according to the value of the control speed. The signals in the form of a binary code from the counter 5 pulses are compared with those recorded from the block 16 for selecting the controlled speed in the comparison element b and in the form of converted binary codes (at the time of the absence of a signal at the output of the counter 5

pulses and at the time of a series of pulses at its output) are fed to the input of the digital comparator 7, where they are once again compared with the recorded signal in the form of a binary code from the block 16 for selecting a controlled speed. The pulse signal from the digital comparator 7 has a frequency two times lower than the signal at the output of the motion direction determining unit 3 and is supplied to the frequency cutter Viv, in the form of short pulses received at its output, fed to the first inputs of the first 9 and second 10 input signal converters, which periodically reset to zero.

5 The high-frequency signal from the first output of the first 9 input signal converter is fed to the input of the Executive unit 15.

If the actual speed exceeds the controlled one, the signal in the form of a binary code at the output of the comparison element b will change and the low-frequency signal will disappear at the output of the digital comparator 7, which is why the output of the multiplier

5, frequency 8, the zeroing signal disappears and the output of the first 9 and the output of the second 10 of the input signal converters install t-in-phase (non-inverse) signals, which will lead to the loss of the signal on block 14

0 control of the converter, disruption of the oscillation of the generator 13 of the input signal and the disappearance of the high-frequency signal at the first output of the first 9 converter of the input signal. Executive unit 15

5 will turn on the braking.

Thus, this device allows you to expand the range of speed control of a moving unit of a railway vehicle.

Claims (1)

Formula of the invention A device for monitoring the speed of a train, comprising a speed sensor connected to a pulse signal control unit, a zero-position sensor of the controller with a delay element, input signal converters and an executive unit connected in input to the output of the first input signal converter, characterized in that, with In order to increase reliability, it is equipped with a mixer, a pulse counter, a comparison element, a digital comparator, a frequency multiplier, a block for selecting a controlled speed, a unit for monitoring the operation of the converters, an input signal generator and a direction determination unit, which is connected by an input to the output of the pulse signal block and the output - with one of the inputs of the mixer, to the output of which are connected. are connected in series a pulse counter, a comparison element, a digital comparator and an hour multiplier currents, the output of which is connected to the inputs of both converters of the input signal, the second inputs of which are connected to the output of the delay element, and the third inputs - to the output of the generator of the input signal, the input of which is connected to the output of the control unit of the converters, the first and second a swarm of inputs which are connected respectively to the second output of the first and second input signal converters, and the third output of the first input signal converter to the second mixer input, wherein the first and second outputs of the controlled speed selection unit are connected respectively to the second inputs of the comparison element and the digital comparator.