CN101726757A - Device for monitoring railway foreign body intrusion by using dynamic signal - Google Patents
Device for monitoring railway foreign body intrusion by using dynamic signal Download PDFInfo
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- CN101726757A CN101726757A CN200910242554A CN200910242554A CN101726757A CN 101726757 A CN101726757 A CN 101726757A CN 200910242554 A CN200910242554 A CN 200910242554A CN 200910242554 A CN200910242554 A CN 200910242554A CN 101726757 A CN101726757 A CN 101726757A
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Abstract
The invention discloses a device for monitoring railway foreign body intrusion by using a dynamic signal, and belongs to the field of disaster prevention and reduction of the foreign body intrusion in rail environment monitoring. In the method for monitoring railway foreign body intrusion, an alternating current signal is adopted, the voltage and power of an input signal and an output signal are monitored, and the signals are ensured not to lead in other signals to cause abnormal work of a power grid due to seton. The multi frequency point working mode of an audio signal ensures that a plurality of paths of power grid cable signals on the same power grid support frame work at different frequencies. If any key device in a drive loop goes wrong, a falling-object relay falls. Due to the adoption of a transformer isolation signal, DC isolation is realized between the interior and the exterior of a board, and the reliability and the safety of the circuit are improved. The AC dynamic mode foreign body sensor has higher safety and reliability than the DC mode foreign body sensor, and accords with guide safety principle of the field of railway signals.
Description
Technical field
The foreign body intrusion that the invention belongs to Railway Environment monitoring field of preventing and reducing natural disasters relates in particular to a kind of device that adopts the Dynamic Signal monitoring railway foreign body intrusion.
Background technology
Develop with high-speed rail technology, railway anti-disaster is as a big engineering project, become big engineering of the newly-built high-speed railway of each bar and technical matters, have influence on the traffic safety of bullet train, be in particular in weather conditions, geologic agent and human factor, these factors can cause great traffic safety accident.The foreign body intrusion that is caused by geologic agent and human factor particularly falls etc. as foreign matter on abrupt slope falling rocks, the bridge and can directly cause derail even bigger safe driving accident.Therefore the foreign body intrusion sensor is in the railway anti-disaster system one the very ingredient of core.
Current foreign body intrusion sensor adopts grid mode, and when foreign body intrusion took place, foreign matter severed electrical network, and electrical network is opened circuit.Present foreign body intrusion sensor electrical network (hereinafter to be referred as the foreign matter electrical network) adopts direct current signal, and after the foreign matter grid line disconnected, coupled relay fell (gravity safety relay) automatically, realizes the break-make monitoring of foreign matter electrical network.Because the foreign matter electrical network of direct current signal is when disconnecting, if grid line is connected with other direct current signal, can cause the foreign matter electrical network false logical, this state is and is dangerous, direct current signal is not a Dynamic Signal simultaneously, do not meet the dynamic driving and monitoring principle of railway signal, have influence on the security of foreign matter electrical network break-make monitoring.
Summary of the invention
The objective of the invention is the problem that exists at the employing direct current signal monitoring railway foreign body intrusion described in the background technology, proposed a kind of device that adopts the Dynamic Signal monitoring railway foreign body intrusion.
It is characterized in that described device comprises signal generation and power amplification circuit, output transformer buffer circuit, signal output and input voltage frequency monitoring circuit, input transformer buffer circuit, signal rectifier circuit, junk relay circuit, lightning protection circuit and foreign matter electrical network;
Above-mentioned signal takes place to be connected with the input end of input voltage frequency monitoring circuit with output transformer buffer circuit and signal output respectively with the output terminal of power amplification circuit;
An output terminal of output transformer buffer circuit is connected with the input end of input voltage frequency monitoring circuit with signal output, and its another output terminal is connected with the foreign matter electrical network by lightning protection;
The input end of input transformer buffer circuit is connected with the foreign matter electrical network by lightning protection, and an output terminal is connected with the input end of input voltage frequency monitoring circuit with signal output, and its another output terminal is connected with the input end of signal rectifier circuit;
An output terminal of signal rectifier circuit is connected with the input end of input voltage frequency monitoring circuit with signal output, and its another output terminal is connected with junk relay end.
Interchange dynamic mode foreign matter sensor proposed by the invention has improved the reliability and security of circuit will far being better than DC mode foreign matter sensor aspect security and the reliability, meeting railway signal field failure to the safe side principle.
Description of drawings
Fig. 1: Dynamic Signal foreign matter sensor is formed block diagram;
Fig. 2: signal produces and the power amplification circuit block diagram;
Fig. 3: typical AC signal observation circuit composition frame chart.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment is elaborated.Should be emphasized that following explanation only is exemplary, rather than in order to limit the scope of the invention and to use.
The invention provides a kind of device that adopts the Dynamic Signal monitoring railway foreign body intrusion.
Signal takes place to adopt lc circuit as signal generating circuit with power amplification circuit, produces approximate square-wave signal, carries out shaping by hysteresis comparator, adopt pliotron that pipe is amplified then, realize that the audio frequency Dynamic Signal produces, power amplification and dynamically output, as shown in Figure 2.When the foreign matter electrical network adopts the multilayer grid mode, adopt the sound signal of different frequency.
By signal take place and the audio frequency active power signal of power amplification circuit output by capacitive coupling every directly linking to each other with the main limit of audio-frequency transformer (AFT) in the output transformer buffer circuit, the other end on main limit and this circuit " " signal links to each other, and realizes AC power coupling output.Simultaneously, audio-frequency transformer (AFT) adopts the two-pack edge mode, one road secondary is used for signal output, another road secondary provides interface for the electric voltage frequency observation circuit, can realize for signal produce with the Working Status Monitoring of amplifying circuit and to frequency input signal monitoring support rightly, working state of system is monitored.The secondary of the electrical network of monitor portion circuit and transformer output is simultaneously realized DC-isolation, makes the circuit working safety and reliability, can not be directed at the system failure owing to the fault of supervisory circuit simultaneously.The output transformer buffer circuit is realized the level conversion of signal simultaneously, makes the signal level that flows on the foreign matter electrical network be lower than the upper limit of safety circuit.
The input transformer buffer circuit is realized access, the level conversion of foreign matter power grid cables signal.Wherein audio-frequency transformer (AFT) adopts the two-pack edge mode, and one group of secondary produces power signal, by signal rectifier circuit, is converted to d. c. voltage signal and drives the junk relay; Another group secondary provides interface for the electric voltage frequency observation circuit simultaneously.Secondary one end of the audio-frequency transformer (AFT) in main limit one end of the audio-frequency transformer (AFT) in the input transformer buffer circuit and the output transformer buffer circuit links to each other by the supporting network metal truss of foreign matter electrical network; when foreign matter power grid cables broken string or insulation damages; can cause the audio-frequency transformer (AFT) master limit short circuit in the input transformer buffer circuit; the junk relay falls; and can not exist owing to metal truss cable holding signal path " vacation " path that causes rupturing, have creepage protection function.
Signal rectifier circuit is converted to direct current signal with the AC audio power signal that the input transformer buffer circuit provides, and drives the junk relay.
It is right that signal output and input voltage frequency monitoring circuit are measured and supported voltage of signals, frequency, prevents the misoperation that causes owing to other AC signal and interface circuit job failure, and it needs monitored signal to comprise:
1) AC signal that provides of output transformer buffer circuit signal monitoring interface;
2) AC signal that provides of input transformer buffer circuit signal monitoring interface;
3) junk relay driving voltage;
This circuit need be realized data interchange with control center simultaneously, adopts data communication interface, as realizations such as CAN or 485.
Wherein, for ac signal measurement; adopt the combination of circuits pattern of Fig. 3, form by holding circuit, ac amplifier circuit, active rectifying circuit, dc amplification circuit, A/D convertor circuit, signal transformation circuit, counting circuit, interface circuit and central processing unit.
The holding circuit function will realize the bidirectional protective to measured signal circuit and supervisory circuit, and guaranteeing does not influence mimic channel work when digital supervision partly breaks down, and when tested AC signal is too high simultaneously, does not damage digital circuit.Adopt resistance and stabilivolt combination can finish this function at the AC signal input end.
Ac amplifier circuit be used for realizing with the AC signal of high output impedance carry out voltage transitions, to adapt to the required level of active rectifying circuit.
The major function of active rectification is that AC signal is converted to direct current signal, guarantees that simultaneously AC signal can not occur guaranteeing the conversion accuracy of signal owing to the caused voltage difference of common commutation diode tube voltage drop in transfer process.
Dc amplification circuit carries out low-pass filtering with the AC signal of active rectification output, carries out the DC level conversion simultaneously, adapts to the needs of AD conversion.
A/D convertor circuit is converted to AC signal with direct current signal, provides voltage data for the supervisory circuit central processing unit simultaneously.
It is direct current square-wave pulsatory signal with the AC sine conversion of signals that signal transformation circuit adopts hysteresis comparator, for counting circuit provides count pulse.
Counting circuit adopts multidigit counter device, and paired pulses is counted, and central processing unit carries out zero clearing to counting circuit within a certain period of time, reads the count value of Fixed Time Interval simultaneously, determines the frequency of signal.
Counter is exported the result with interface circuit and the central processing unit data bus is realized interconnection.
The DC converting circuit of supervisory circuit adopts holding circuit, direct current to amplify, AD changes and central processing unit is realized interconnection.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and is familiar with those skilled in the art in the technical scope of the present invention's exposure; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (7)
1. device that adopts the Dynamic Signal monitoring railway foreign body intrusion, it is characterized in that described device comprises signal generation and power amplification circuit, output transformer buffer circuit, signal output and input voltage frequency monitoring circuit, input transformer buffer circuit, signal rectifier circuit, junk relay circuit, lightning protection circuit and foreign matter electrical network;
Above-mentioned signal takes place to be connected with the input end of input voltage frequency monitoring circuit with output transformer buffer circuit and signal output respectively with the output terminal of power amplification circuit;
An output terminal of output transformer buffer circuit is connected with the input end of input voltage frequency monitoring circuit with signal output, and its another output terminal is connected with the foreign matter electrical network by lightning protection circuit;
The input end of input transformer buffer circuit is connected with the foreign matter electrical network by lightning protection circuit, and an output terminal is connected with the input end of input voltage frequency monitoring circuit with signal output, and its another output terminal is connected with the input end of signal rectifier circuit;
An output terminal of signal rectifier circuit is connected with the input end of input voltage frequency monitoring circuit with signal output, and its another output terminal is connected with the junk relay circuit.
2. a kind of device that adopts the Dynamic Signal monitoring railway foreign body intrusion according to claim 1, it is characterized in that, described signal takes place to adopt lc circuit as signal generating circuit with power amplification circuit, produce approximate square-wave signal, carry out shaping by hysteresis comparator, adopt pliotron that pipe is amplified signal then, generate audio frequency dynamic communication signal, and with the monitor signal of this signal as the foreign matter electrical network.
3. a kind of device that adopts the Dynamic Signal monitoring railway foreign body intrusion according to claim 1, it is characterized in that, described signal produce with the audio frequency dynamic communication signal of power amplification circuit output by capacitive coupling every directly linking to each other with the main limit of output transformer buffer circuit sound intermediate frequency transformer, the other end on main limit and this circuit " " signal links to each other.
4. a kind of device that adopts the Dynamic Signal monitoring railway foreign body intrusion according to claim 3, it is characterized in that, described audio-frequency transformer (AFT) adopts the two-pack edge mode, and one road secondary is used for signal output, and another road secondary provides interface for the monitoring of signal output and input voltage frequency.
5. a kind of device that adopts the Dynamic Signal monitoring railway foreign body intrusion according to claim 1, it is characterized in that an end of an end on the main limit of described input transformer buffer circuit sound intermediate frequency transformer and the secondary of output transformer buffer circuit sound intermediate frequency transformer links to each other by the metal truss of foreign matter electrical network.
6. a kind of device that adopts the Dynamic Signal monitoring railway foreign body intrusion according to claim 5, it is characterized in that, described input transformer buffer circuit sound intermediate frequency transformer adopting two-pack edge mode, one road secondary is used to produce power signal, and another road secondary provides interface for the monitoring of signal output and input voltage frequency.
7. a kind of device that adopts the Dynamic Signal monitoring railway foreign body intrusion according to claim 1 is characterized in that, described signal output separates with other circuit with input voltage frequency monitoring circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102425541A CN101726757B (en) | 2009-12-16 | 2009-12-16 | Device for monitoring railway foreign body intrusion by using dynamic signal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009102425541A CN101726757B (en) | 2009-12-16 | 2009-12-16 | Device for monitoring railway foreign body intrusion by using dynamic signal |
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| CN101726757A true CN101726757A (en) | 2010-06-09 |
| CN101726757B CN101726757B (en) | 2012-07-04 |
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| CN2009102425541A Expired - Fee Related CN101726757B (en) | 2009-12-16 | 2009-12-16 | Device for monitoring railway foreign body intrusion by using dynamic signal |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102060039A (en) * | 2010-11-02 | 2011-05-18 | 北京佳讯飞鸿电气股份有限公司 | Direct-current pulse driving and detecting device for foreign body sensor |
| CN102514594A (en) * | 2011-12-08 | 2012-06-27 | 西安理工大学 | High-speed railway highway-over-railway foreign matter invasion monitoring system based on optical fiber |
| CN102673610A (en) * | 2012-05-29 | 2012-09-19 | 北京佳讯飞鸿电气股份有限公司 | Railway disaster-preventing foreign body invasion-limiting monitoring system |
| CN102914698A (en) * | 2012-10-31 | 2013-02-06 | 上海膜林科技有限公司 | Circuit and method for measuring resistance loss of crystal oscillating wafer of crystal control instrument |
| CN103144651A (en) * | 2012-12-27 | 2013-06-12 | 北京佳讯飞鸿电气股份有限公司 | Foreign invasion limiting monitoring system orienting to railway disaster prevention |
| CN104260760A (en) * | 2014-10-15 | 2015-01-07 | 北京世纪瑞尔技术股份有限公司 | Direction control based foreign body invasion limit monitoring system |
| CN104502803A (en) * | 2014-12-24 | 2015-04-08 | 北京佳讯飞鸿电气股份有限公司 | Power network monitoring device and system |
| CN105527496A (en) * | 2016-02-03 | 2016-04-27 | 河南辉煌科技股份有限公司 | Method for detecting sensor resistance of foreign-matter invasion detection circuit |
| CN109029580A (en) * | 2018-08-14 | 2018-12-18 | 北京航天新风机械设备有限责任公司 | A kind of airtight storing and transporting box enviromental monitoring equipment |
Family Cites Families (3)
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| US6895362B2 (en) * | 2003-02-28 | 2005-05-17 | General Electric Company | Active broken rail detection system and method |
| CN101249835B (en) * | 2008-03-28 | 2010-06-09 | 江苏今创安达交通信息技术有限公司 | High-speed railway foreign matter invasion observation system |
| CN201280140Y (en) * | 2008-09-04 | 2009-07-29 | 河南辉煌科技股份有限公司 | Foreign body approaching limit detection apparatus |
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2009
- 2009-12-16 CN CN2009102425541A patent/CN101726757B/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102060039B (en) * | 2010-11-02 | 2012-12-05 | 北京佳讯飞鸿电气股份有限公司 | Direct-current pulse driving and detecting device for foreign body sensor |
| CN102060039A (en) * | 2010-11-02 | 2011-05-18 | 北京佳讯飞鸿电气股份有限公司 | Direct-current pulse driving and detecting device for foreign body sensor |
| CN102514594A (en) * | 2011-12-08 | 2012-06-27 | 西安理工大学 | High-speed railway highway-over-railway foreign matter invasion monitoring system based on optical fiber |
| CN102673610B (en) * | 2012-05-29 | 2015-06-24 | 北京佳讯飞鸿电气股份有限公司 | Railway disaster-preventing foreign body invasion-limiting monitoring system |
| CN102673610A (en) * | 2012-05-29 | 2012-09-19 | 北京佳讯飞鸿电气股份有限公司 | Railway disaster-preventing foreign body invasion-limiting monitoring system |
| CN102914698A (en) * | 2012-10-31 | 2013-02-06 | 上海膜林科技有限公司 | Circuit and method for measuring resistance loss of crystal oscillating wafer of crystal control instrument |
| CN102914698B (en) * | 2012-10-31 | 2015-05-13 | 上海膜林科技有限公司 | Method for measuring resistance loss of measuring circuit of crystal oscillating wafer of crystal control instrument |
| CN103144651A (en) * | 2012-12-27 | 2013-06-12 | 北京佳讯飞鸿电气股份有限公司 | Foreign invasion limiting monitoring system orienting to railway disaster prevention |
| CN104260760A (en) * | 2014-10-15 | 2015-01-07 | 北京世纪瑞尔技术股份有限公司 | Direction control based foreign body invasion limit monitoring system |
| CN104502803A (en) * | 2014-12-24 | 2015-04-08 | 北京佳讯飞鸿电气股份有限公司 | Power network monitoring device and system |
| CN104502803B (en) * | 2014-12-24 | 2017-10-03 | 北京佳讯飞鸿电气股份有限公司 | A kind of power network monitoring apparatus and system |
| CN105527496A (en) * | 2016-02-03 | 2016-04-27 | 河南辉煌科技股份有限公司 | Method for detecting sensor resistance of foreign-matter invasion detection circuit |
| CN105527496B (en) * | 2016-02-03 | 2018-05-11 | 河南辉煌科技股份有限公司 | A kind of method for detecting foreign body intrusion detection circuit sensor resistance |
| CN109029580A (en) * | 2018-08-14 | 2018-12-18 | 北京航天新风机械设备有限责任公司 | A kind of airtight storing and transporting box enviromental monitoring equipment |
| CN109029580B (en) * | 2018-08-14 | 2023-08-11 | 北京新风航天装备有限公司 | Airtight storage and transportation case environment monitoring equipment |
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