CN104176093B - A kind of relay for axle counting system drives safely and detection method - Google Patents
A kind of relay for axle counting system drives safely and detection method Download PDFInfo
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- CN104176093B CN104176093B CN201410459099.1A CN201410459099A CN104176093B CN 104176093 B CN104176093 B CN 104176093B CN 201410459099 A CN201410459099 A CN 201410459099A CN 104176093 B CN104176093 B CN 104176093B
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Abstract
The invention discloses a kind of track relay for axle counting system to drive safely and detection method, adopt 2 single-chip microcomputers, 1 relay of control independently, being connected by the contact of these 2 relays controls track relay.The control method of each relay is: the square-wave signal of single-chip microcomputer output passes sequentially through voltage amplification, power amplification, isolation, rectification, filtering, finally produces required DC voltage control relay.This relay comprises 2 groups and with upper contact, and one group of contact is for output loop and retaking of a year or grade detection, and another group contact is for retaking of a year or grade detection.An axle counting system feature in the application is that relay falls is safe, this technical scheme make use of this feature of axle counting system just, adopting square-wave signal to control picking up of relay, any type of fault all can cause that square-wave signal disappears, and relay falls.Compared with the scheme that existing employing fixed level controls relay, substantially increase the safety of system.
Description
Technical field:
The present invention is applied to railway signal axle counting system field, relates to a kind of relay for axle counting system and drives safely and detection method.
Background technology:
At present, the equipment can complete the track section free time in rail transportation system, taking inspection mainly has two kinds: track circuit and axle counting system.Track circuit is the circuit constituted as conductor using one section of rail on rail track, and one end is transmitter, and the other end is receptor.When not having train to sail this section of track into, receptor can receive the normal signal that transmitter sends, it was shown that section does not have train, and state is idle.When there being train to sail this section of track into, due to the signal shorts that transmitter is sent by the steel wheel shaft of train, cause that receptor cannot receive the normal signal that transmitter sends, it was shown that section has train, and state is for taking.Adopt rail as transmission conductor just because of track circuit, cause that it has inborn deficiency.First: when railway roadbed humidity, hydrops, the leakage current between rail is relatively big, and when not having train to sail into, receptor also cannot receive the normal signal that transmitter sends, and display block state, for taking, namely takies without car, affects conevying efficiency；Second: for moist and little section of driving a vehicle, rail gets rusty easily, even if causing having train to sail this section into, owing to having rust between train wheel shaft and rail, make wheel shaft cannot short-circuit two one steel rails, receptor remains able to receive the normal signal that transmitter sends, and display block state is idle, namely there is car idle, have a strong impact on traffic safety；3rd: owing to the earth is had signals leakiness by rail, cause that track circuit section distance is shorter, general section length is more than 1 kilometer, it is impossible to meet longer section demand.And axle counting system exactly can solve the problem that the deficiency of above-mentioned track circuit, axle counting system is only small by the impact of surrounding, and rail gets rusty, axle counting system is not had any impact by railway roadbed hydrops etc., and the section length of axle counting system can reach tens kilometers.Just because of these advantages so that axle counting system becomes the standard configuration equipment of subway, light rail signaling system, and also has a wide range of applications in big railway.
The application principle of axle counting system is: be respectively provided with an axle-counting points in each gateway of track section, the train wheel shaft entering and exiting this section can be counted by each axle-counting points, then count results is issued indoor meter shaft main frame, the Train Wheel number of axle that all axle-counting points of this section are sent can be carried out COMPREHENSIVE CALCULATING by indoor meter shaft main frame, thus judging the free time of this section, seizure condition.Simplest section is the linear section being made up of 2 axle-counting points, and this section is made up of axle-counting points A and axle-counting points B, and the number of axle that axle-counting points A counts is X, and the number of axle that axle-counting points B counts out is Y.When X is equal to Y, it was shown that do not have train in section, state is idle, then control track relay and pick up.When X is not equal to Y, it was shown that have train in section, state for taking, then controls track relay and falls.
Owing to axle counting system needs the free time of output track section, seizure condition, namely control picking up and falling of track relay, pick up and show that this track section is idle, fall and show that this track section takies.As can be seen here, the output element of axle counting system, namely the control circuit of track relay is most important to the safety of whole system, and the malfunction of track relay may result in serious security incident.
The track relay control circuit of existing axle counting system mainly has two ways, is described below respectively:
The first control mode is as shown in Figure 1: two single-chip microcomputers independently export a level signal, low level represents and takies, high level represents idle, the two level signal synthesizes a road signal through an AND circuit, and the signal after synthesis controls picking up and falling of track relay through amplifying of driver.First shortcoming of this control mode is to cause that the output with door is fixed as high level when AND circuit damages, then track relay is no longer remained pick up by the control of single-chip microcomputer, and this likely results in serious security incident.Second shortcoming is the state being not detected by track relay.
The second control mode is as shown in Figure 2: two single-chip microcomputers independently export a level signal, and low level control pcb board relay falls, and expression takies, and high level controls pcb board relay energized, represents the free time.The contact series connection of two pcb board relays controls picking up and falling of track relay.First shortcoming of this control mode is to cause that output is fixed as high state when certain stage circuit damages, then corresponding pcb board relay is no longer remained pick up by the control of single-chip microcomputer, if owing to the reason such as thunder and lightning, surge causes that two-way output circuit is all fixed as high state, then causing that track relay is no longer remained pick up by the control of single-chip microcomputer, this likely results in serious security incident.Second shortcoming is to be not detected by the control loop of track relay.
Summary of the invention:
Drive and detection method Problems existing for above-mentioned existing axle counting system track relay, the invention provides a kind of new track relay for axle counting system and drive safely and detection method.
This invention address that the technical scheme of the problems referred to above as shown in Figure 3: adopt the track relay drive circuit of safety, method particularly includes: adopt 2 single-chip microcomputers, 1 pcb board relay of control independently, by the contact of these 2 pcb board relays connect (contact of a pcb board relay controls positive supply, and the contact of another pcb board relay controls negative supply) control track relay.
The control method of each pcb board relay is: the square-wave signal of single-chip microcomputer output passes sequentially through voltage amplifier circuit, power amplification circuit, isolation circuit, rectification circuit, filter circuit, finally produces required DC voltage control pcb board relay.An axle counting system feature in the application is that track relay falls is safe, this technical scheme make use of this feature of axle counting system just, square-wave signal is adopted to control picking up of pcb board relay, in pcb board outputting circuit for relay, the fault of any point all can cause the disappearance of square-wave signal, thus causing that pcb board relay falls, namely track relay falls failure to the safe side.
This invention address that the technical scheme of the problems referred to above further comprises: adopt 2 grades or notching relay detection technique, both the state of pcb board relay was detected, also the output loop of track relay is detected simultaneously.Method particularly includes: this pcb board relay comprises 2 groups and with upper contact, and one group of contact detects for the state retaking of a year or grade of pcb board relay, and another group contact both controls track relay for output loop, is simultaneously used for the detection of output loop.When single-chip microcomputer order relay energized, the result of retaking of a year or grade detection is that relay falls, it was shown that relay drive circuit breaks down, then single-chip microcomputer alert, notifies that attendant changes board.When single-chip microcomputer order relay falls, the result of retaking of a year or grade detection is relay energized, it was shown that relay breaks down, then single-chip microcomputer alert, notifies that attendant changes board.
Accompanying drawing illustrates:
Fig. 1 is existing axle counting system track relay control circuit mode 1 theory diagram.
Fig. 2 is existing axle counting system track relay control circuit mode 2 theory diagram.
Fig. 3 is the axle counting system track relay control circuit theory diagram of the present invention.
Detailed description of the invention:
The present embodiment is the preferred embodiment of the present invention, and other its principles all are identical with the present embodiment or approximate with basic structure, all within scope.
The present invention protects a kind of track relay for axle counting system drive safely and detection method, adopt square-wave signal to control relay, adopt 2 grades or notching relay detection technique.In the present embodiment, adopt 2 single-chip microcomputers, 1 pcb board relay of control independently, by the contact of these 2 pcb board relays connect (contact of a pcb board relay controls positive supply, and the contact of another pcb board relay controls negative supply) control track relay.
Refer to accompanying drawing 3, the control mode of pcb board relay is: single-chip microcomputer output square-wave signal, sequentially pass through voltage amplifier circuit, power amplification circuit, isolation circuit, rectification circuit, filter circuit, finally produce required DC voltage control pcb board relay.Advantage of this embodiment is that no matter be that system restarts or breaks down in any point in control circuit, all can cause the disappearance of square-wave signal, thus causing falling of pcb board relay, this circuit inherently has the circuit of fail-safe performance.
In an embodiment, application two takes the principle of two especially, adopt 2 single-chip microcomputers independently to export square-wave signal and control 1 pcb board relay, with the real performer-track relay of the series connection point control of these 2 pcb board relays, namely constitute one the two fail-safe type of drive taking two types.
In an embodiment, pcb board relay adopts has 2 groups and with upper contact, the safety type relay with mandatory guide function, adopt 2 grades or notching relay detection technique, both the state of pcb board relay was detected, also the output loop of track relay is detected simultaneously.If single-chip microcomputer detects the malfunction of any relay, all can alert, notify that attendant changes board.
In being embodied as, it is also possible at relay two ends reversely and connect fly-wheel diode, for suppressing the impact to component of inverse electromotive force that relay coil produces, it is to avoid circuit component damage.
In an embodiment, the generation of square-wave signal and 2 grades or notching relay retaking of a year or grade detection are realized by scm software, and other links realize each through hardware circuit.
Claims (3)
1. the track relay safety drive for axle counting system, it is characterized in that: include 2 single-chip microcomputers, 1 pcb board relay of control independently, the contact series connection of 2 pcb board relays, the contact of one pcb board relay controls positive supply, the contact of another pcb board relay controls negative supply, and single-chip microcomputer adopts square-wave signal to control pcb board relay；Each pcb board relay comprises 2 groups and with upper contact.
2. a kind of track relay safety drive for axle counting system according to claim 1, it is characterized in that: the square-wave signal of single-chip microcomputer output passes sequentially through voltage amplifier circuit, power amplification circuit, isolation circuit, rectification circuit, filter circuit, finally produces required DC voltage control pcb board relay.
3. the detection method of a kind of track relay safety drive for axle counting system according to claim 1, is characterized in that:
Including 2 single-chip microcomputers 1 pcb board relay of control independently, the contact series connection of 2 pcb board relays, the contact of one pcb board relay controls positive supply, the contact of another pcb board relay controls negative supply, single-chip microcomputer passes sequentially through voltage amplifier circuit, power amplification circuit, isolation circuit, rectification circuit, filter circuit, finally produces required DC voltage control pcb board relay；Adopting square-wave signal to control picking up of pcb board relay, in pcb board outputting circuit for relay, the fault of any point all can cause the disappearance of square-wave signal, thus causing that pcb board relay falls, it is ensured that track relay falls failure to the safe side；
Each pcb board relay comprises 2 groups and with upper contact, and one of which contact detects for the state retaking of a year or grade of pcb board relay, and another group contact both controlled track relay for output loop, was simultaneously used for the detection of output loop.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410459099.1A CN104176093B (en) | 2014-09-10 | 2014-09-10 | A kind of relay for axle counting system drives safely and detection method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410459099.1A CN104176093B (en) | 2014-09-10 | 2014-09-10 | A kind of relay for axle counting system drives safely and detection method |
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| CN104176093A CN104176093A (en) | 2014-12-03 |
| CN104176093B true CN104176093B (en) | 2016-07-06 |
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| CN112564484B (en) * | 2020-11-05 | 2022-04-12 | 北京全路通信信号研究设计院集团有限公司 | High-safety remote emergency switch device based on Internet of things technology and data processing method |
| CN115402374B (en) * | 2022-10-08 | 2024-03-01 | 通号(西安)轨道交通工业集团有限公司北京分公司 | Track circuit system for detecting use state of track section |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201268315Y (en) * | 2008-06-27 | 2009-07-08 | 北京康吉森交通技术有限公司 | Axle counter track circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB373649A (en) * | 1930-03-27 | 1932-05-17 | Ver Eisenbahn Signalwerke Gmbh | Improvements in or relating to railway axle counting apparatus |
| CN2104797U (en) * | 1991-10-23 | 1992-05-20 | 上海铁道学院 | Electronic high voltage pulsive circuit devive of railway track |
| CN101337552B (en) * | 2008-08-21 | 2011-11-23 | 北京佳讯飞鸿电气股份有限公司 | Counting axle system using double 2-vote-2 system |
| CN102693608A (en) * | 2012-05-29 | 2012-09-26 | 北京佳讯飞鸿电气股份有限公司 | Earthquake monitoring system for railway disaster preparedness |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201268315Y (en) * | 2008-06-27 | 2009-07-08 | 北京康吉森交通技术有限公司 | Axle counter track circuit |
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