Alarm control method for crossing section

Abstract

The invention relates to an alarm control method for a crossing section. A device comprising a detection circuit and a control circuit is adopted. When a train gets close to magnetic steel, an alarm is given, the train occupies a crossing, a track relay is demagnetized, a continuous alarm circuit composed of the track relay, a first diode and a continuous alarm power terminal is switched on, and then the alarm is kept; meanwhile, an excitation power source of a reverse track relay is switched on to make the reverse track relay act to be attracted, and an RC circuit is charged at the same time; when the train travels out of the crossing, an alarm removing circuit composed of the track relay, the reverse track relay and an alarm removing terminal is switched on, an impulse voltage is sent out at a moment by means of immediate excitation of the track relay and slow release of the reverse track relay, and the alarm initiated by the corresponding magnetic steel is removed. Through the alarm control method, the problem that when the train runs in the occupied crossing section, an alarm is interrupted in advance and consequently a lifting rod of a keurboom machine is started can be solved.

Description

technical field [0001] The invention relates to the technical field of automatic alarms, in particular to an alarm control method for crossing sections. Background technique [0002] Since January 2010, in order to implement the "low cost, high efficiency" business strategy, the logistics department of Ningbo Iron and Steel Co., Ltd. has adopted the automatic signal control method of point-type crossings with magnetoelectric sensors. Three railway level crossings on the road were transformed with automatic alarm technology, and the original guarded crossings were changed to unguarded crossings. The alarm control of the crossing section adopts non-insulated track circuit equipment, and there is a phenomenon that the light vehicle "jumps" instantly (that is, the phenomenon of speeding), and the vehicle train interrupts the alarm in advance when it is running in the crossing section-starting the phenomenon of raising the pole of the fence, especially for railway three The numb...

AI Technical Summary

Problems solved by technology

480 track circuit or audio non-insulated track circuit is generally used in China for alarm control in the crossing section, but there is a problem that the train wheel pair cannot effectively short-circuit the rail voltage (signal) due to poor branching of the track circuit, so that the train runs in the occupied crossing section Instantaneous "speeding" phenomenon occurs from time to time, which cannot solve the problem of early interruption alarm, because the interruption alarm problem caused by poor track circuit shunting has not yet found an effective solution; in addition, the audio track circuit equipment in the crossing section is expensive, Frequent faults and difficult maintenance

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