Railroad switch gap critical alarm system

Abstract

The invention discloses a turnout gap critical alert system, which is made up of turnout information collecting extension, turnout information machine. The turnout information collecting extension completes the data transmission between the turnout information collecting extension and turnout information through the low voltage direct current source on two signal cable wires with DTMF double audio frequency signal superposing technology; and then it is connected to the signal computer supervising network system through CAN bus; the sensor in the turnout information collecting extension is an arc object arranged on two parallel surface or the bottom of checking pole on current electric point switch; the contact point of the checking block on the point switch and the chordal height or chordal length of the sensor are used as the critical state switch value of turnout gap. The invention is accurate and reliable.

Description

technical field [0001] The invention relates to the technical field of railway signals, in particular to an alarm system for sampling the switching value of the critical state of the switch gap in each railway station and the actual position of the switch on site. Background technique [0002] The running direction of the train in railway transportation is determined by the automatic operation of the automatic control equipment in the control center to determine the position of the turnout; the safety of the train is guaranteed by the monitoring of the gap state of the turnout. Either one of the two has a problem, which will immediately cause a major traffic accident, hurting personal safety or property loss. The turnout is the "tiger's mouth" of railway transportation safety at present, but the automatic control equipment currently used cannot find the critical state of the gap gap of the turnout far away from the control center, and the actual position of the turnout on si...

AI Technical Summary

Problems solved by technology

If any of the two goes wrong, it will immediately lead to a major traffic accident, injuring personal safety or property damage.

Turnout is the "tiger's mouth" of railway transportation safety at present, but the automatic control equipment currently used cannot detect the critical state of the gap gap of the turnout far away from the control center, and the actual position of the turnout site

[0003] There is an existing switch gap alarm system. The signal collected by the information collection extension installed at the switch gap is an analog quantity, and when the sensor collects the signal, it can only collect information in one of the two directions of each switch gap. , the information in the other direction can only be obtained by calculation, and does not consider the fit tolerance caused by the allowable tolerance in mechanical manufacturing, and its accuracy is poor

The signal transmission between the information collection extension and the upper-level turnout monitoring machine is realized by 220 volt or 110 volt power lines, which is less safe and prone to electric shock hazards during maintenance

Due to the use of 220 volt or 110 volt power lines to transmit data signals, the volume of the information collection extension is relatively large, generally 400mm×300mm×200mm, which cannot be placed in the signal cable box, and it is very inconvenient for the staff to maintain

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