SU432450A1 - DEVICE FOR THE CONTROL OF CODAFOND TIME PARAMETERS ^ - Google Patents

Description

one

The invention relates to automation and telemechanics in railway transport, in particular to devices for monitoring and measuring the timing parameters of a locomotive signaling code.

There are known devices for monitoring time parameters of a code, containing a pulse and spacing distributor connected to a pulse end and start blocks, a calibrated tag generator connected to a pulse start block and with a pulse counter, AND and OR gates and a reset key. However, the use of known devices to control the code time parameters leads to an increase in hardware, since the known devices do not have circuit rebuilding elements and do not provide consistent testing of pulses and code intervals that may have different standards. The purpose of the invention is to reduce the number of hardware. This is achieved by the fact that the device is equipped with a signal rate former connected to a calibrated tag generator, AND and OR logic gates, and a reset key. In addition, in the signal rate former, the pulse counter can be connected via a decoder to the pulse and interval rate switches, the fixed contacts of which are connected to the AND pulse and interval logic elements, respectively, connected to the norm block via the OR logical element. - directly.

FIG. 1 shows a block diagram of the device described; in fig. 2 is a block diagram of a signal normalizer. Distributor 1 impuls and intervals

the code converts the first pulse and the first code interval into the corresponding, and time intervals, the leading edge of which acts on the unit 2 of the beginning of the pulse, starts the generator of 3 calibrated marks, and

the back front is on the block 4 of the end of the pulse, which produces a zero pulse as a result. The calibrated time stamps are perceived by the counting input 5 of the former 6 of the signal normals, the output of which after

the norm of time appears a single impulse.

The operation of the device depends on the sequence of occurrence of the pulse "O at the output of block 4 and pulse" 1 at the output 7 of the driver 6. There can be four cases.

And the ery in the case. The pulse duration of the code is less than normal. After the end of the code pulse, "1 from the bottom input of the logic element" OR 8 and, therefore, from the control input 9 of the counter 10

pulses, which begins to perceive the calibration pulses arriving at its counting input 11 until the occurrence of 1 at the output 7 of the driver 6. Thus, in the counter 10, the shortage to the norm is recorded. In this case, the reset key 12 remains in the initial state, and the entire device is reset by the printing unit.

The second case. The duration of the first pulse code is equal to or greater than the norm. After the time of the norm and until the end of the pulse code at the output of the logical element "And

13, a pulse "1" acts, from the trailing edge of which the driver 6 is tuned to check the code interval, and the reset key 12 sets the device to its initial state.

The third case. Duration of the code interval is less than the norm. The operation of the device is similar to the operation of the first case with the only difference that in the counter 10 the "shortage for the code interval is recorded.

The fourth case. The length of the code interval is equal to or greater than the norm. The operation of the device is similar to the operation of the second case, but from the falling edge of the pulse, 1 driver 6 is configured to check the code pulse.

The principle of operation of the sigpal rate former is as follows. When checking the pulse width of the code of the generator 3 mark, the counting input 5 of the counter enters.

14 pulses and then through the decoder 15 to the fixed contacts of the switches 16 and 17 of the norms of pulses and intervals. When the time determined by the position of the switch 16 passes, the upper input of the logical element "AND 18 of the pulse appears" 1, resulting in the logical element "OR

19 has an impact on block 20 of the norm. Thus, upon expiration of the norm of the pulse time, the output 7 of the former appears as "1. In the case of compliance with the norm and pulse, the control unit 21, under the action of element 13, prepares the driver for checking the code interval. When the interval norm is executed, element 13, again acting on block 21, brings it back to its original state.

The drawing shows: 22 - control input of the imager 6; 23 - logical element “And interval.

Subject invention

Claims (2)

1. A device for controlling the code time parameters, containing a pulse and interval distributor, connected to the pulse end and start blocks, a generator calibrated tags, connected to a pulse start unit and with a pulse counter, logical elements AND and OR, and a reset key, characterized in that, in order to reduce the number of equipment, it it is equipped with a signal rate former connected to a calibrated tag generator, logic gates “AND and“ OR, and a reset key. 2. The device according to claim 1, characterized in that in the signal condition generator The pulse counter is connected via a decoder to the norm and pulse switches and intervals, the fixed contacts of which are connected to the AND pulse and interval logic elements, respectively, connected to the norm block via the OR gate, and directly to the control unit. iPut.i