SU688989A1 - Switching apparatus - Google Patents

Description

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The invention relates to the field of automation and can be used in railway automation systems in the development of voltage and frequency-voltage transducers.

Known switching devices that contain triggers, decoder, elements And encoder 1.

The disadvantage of these devices is the impossibility of using them in railway automation, which limits the functionality.

In addition to this, switching devices are known, for example, a linear encoder comprising a multivibrator consisting of a transformer, a diode bridge and a driver, the output of which is connected to the input of a trigger counter and a matrix.

The disadvantages of the device are low reliability due to the appearance of false information, and the impossibility of its use in railway automation.

In order to increase reliability and expand functionality, a switching device containing a transformer connected in series, a diode bridge, a driver and a counter, as well as a key, whose input is connected to the output of a diode bridge, has three

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trigger, encoder and two multistable trigger, and the output of the counter through the first trigger is connected to the first multistable trigger and the input of the second trigger, the other input of which is connected to the other output of the imaging unit and the first input of the second multi-stable trigger. The outputs of the second trigger through the first multistable trigger and the encoder are connected respectively to another input of the counter and through the third trigger to another input of the key. In addition, the second input of the second multistable trigger is connected to the input of the counter, the third input is connected to the input of the third trigger, and the output is connected to another input of the first trigger.

The drawing shows a block diagram of the device.

The device consists of a transformer 1 connected via a diode bridge 2 to a driver of 3 rectangular i.pulses and to the input of a control key 4, a trigger counter 5, the output of which is connected to the input of trigger 6, the output of the latter is connected to the inputs of the installation of trigger 7 and a multistable trigger 8. The counting input of the trigger 7 is connected to the inverse input of the imager 3 rectangular pulses, and the outputs of the trigger 7 are connected respectively to the even and odd inputs mn

multistable trigger 8, the outputs of which through the encoder 9, are connected to the reset bus of the trigger counter 5, the counting input of the trigger 10 and the installation input of the myostable trigger I, the inputs of which are connected to the forward and inverse outputs of the driver 3, respectively, and the output to the trigger input 6, respectively. The output of the trigger 10 is connected to the controllable input of the key 4.

The device works as follows.

The alternating voltage from the output of the transformer 1 is fed to the diode bridge 2, which is pulsed from the output, its voltage is fed to the input of the control key 4 and to the input of the former 3 rectangular pulses, which is a variable from its variable The output of the diode bridge 2 forms rectangular pulses. The signal from the direct output of the imaging unit 3 is fed to the input of the trigger counter 5, as well as to the input of the multistable trigger 11, and from the inverse output to the other input of the myo-stable trigger 11 and to the counting input of the trigger 7. These triggers will not function, since “The prohibition of the encoder 9 and the trigger 6.

The trigger 6 is turned on after a predetermined number of pulses of the driver 3, determined by the number of bits of the trigger counter 5. Upon reaching a predetermined number of pulses from the driver 3, the trigger 6 turns on and enters the gate. Turning on jpnrrepa 6 removes the prohibition from trigger 7 and multistable trigger 8. Trigger 7 begins to work in frequency division of the signal from driver 3. Signals of trigger outputs 7 are sent to odd and even inputs of a multistable trigger 8, which accumulates in itself the number of pulses that is set by the encoder 9. The outputs of all stages of the multistable trigger 8 are connected to the inputs of the encoder 9. After the multistable trigger 8 has accumulated a specified number of pulses, the signal from the output of the imager 3 Through the encoder 9 enters the reset trigger bus 5, which is set in the outgoing state, the ban is removed from the multistable And trigger and the trigger 10 is switched, which opens or locks the key 4. When the prohibition of the multistable And trigger is removed, the next impulse shaper 3 turns on the first cascade of the multistable trigger I, and at the end of this pulse a second cascade of the multistable trigger 11 is turned on, from the output of which the signal goes to erasing the information of the first trigger 6. Trigger 6, turning off, erases the information in the multistable trigger 8 and sets a ban for trigger 7. The soft information in the multistable trigger 8 is erased, and the signal from the direct output of the encoder 9 removes the ban from the trigger counter 5, and the inverse output is received and the accumulated information a multistable trigger 11, the shutdown of which removes the inhibit signal from trigger 6. Therefore, at this moment the device is restored to its original state and prepared for a new count of pulses coming from the rover 3.

The switching device allows to increase the reliability, to expand the information stability of the automastering systems, and therefore to increase the capacity of the trains and to ensure the shutdown of the devices for any damage.

Claims (2)

1. USSR author's certificate No. 545080, cl. N OZK 17/02, 14.07.75. 2. Kazakov A. A. Electrochel centralization of arrows and signals. M., “Transport, 1968, p. 309-314 (prototype).