SU447315A1 - Device for tracking moving objects - Google Patents

Description

I

i The invention relates to signaling, centralization and interlocking devices 1 for railway transport.

Devices are known for determining the tracing of moving objects containing two railway tracks with a common sensor range located on different threads, connected to the counter via a signal selection unit, a pulse shaper and a coincidence circuit that emit pulses to one of the two reversible counter inputs. depending on the direction or movement of the wheelset

units.

The aim of the invention is to increase the noise immunity of the device.

This is achieved by the fact that the signal selection unit is executed on logical elements. max and NOT. At the same time, the output of each sensor is connected to the logical element NOT and the output of the signal selection unit through the logical element I, and the output; the logical element NOT, relative to the first sensor, is connected to the logical one.

 element And, referring to the second | sensor,

The drawing shows a structural diagram of the proposed device.

The device is a circuit in which sensors 1 and 2 of information with a common area of action are connected via a signal selection unit 3, a pulse shaper 4 and a matching circuit 5 and 6 to the counter. The information sensor may consist of sensing and threshold elements that convert the magnitude of the signal of the track sensor to rectangular.

The signal selection unit consists of logic elements 7 and 8 AND, logic elements 9 and 1 O and is not designed to separate the original signal from sensors 1 and 2.

At the initial appearance of the signal from sensor 1, the signal selection unit repeats it and supplies 4 pulses to the input of the driver. The subsequent influence of the signal of sensor 2 will not change the state of your circuit until the signal of sensor 1 disappears. Pulse

3

It occurs at the output of the corresponding pulse former at the moment when its input signal disappears. The pulse at the output of the device 5 coincides with the Vits system only when the pulse generator 4 signal and the information sensor 2 signal coincide in time, which is ensured by a strictly specified algorithm of the device operation. When the sensor 2 signal first appears, the circuit works in a similar way.

Thus, the pulse at the output of the device will take place only in the event of the initial appearance and disappearance of one of the sensor signals and the presence of the common time zone of these signals. For all states of the inputs, including Kot, the signal of one sensor overlaps in time or several signals from another sensor, the false pulse high is excluded.

Subject of invention j

A device for determining the tracking of moving objects, containing two gels of a roadway with a common sensor area located on different threads, connected to the counter through a signal selection unit, an impulse driver and a coincidence circuit, characterized in that, in order to improve noise immunity, the unit signal selection, performed on the logical elements NOT and AND; the output of each sensor is connected to the logical element NOT and the output of the signal selection unit through the logical element AND, and the output of the logical element NOT connected to the first sensor is connected to the logical element AND relating to the BTOijoMy sensor.

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