CN205417654U - Disconnected rail monitoring system device - Google Patents
Disconnected rail monitoring system device Download PDFInfo
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- CN205417654U CN205417654U CN201620196099.1U CN201620196099U CN205417654U CN 205417654 U CN205417654 U CN 205417654U CN 201620196099 U CN201620196099 U CN 201620196099U CN 205417654 U CN205417654 U CN 205417654U
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Abstract
The utility model relates to a railway safety monitoring facilities specifically is a disconnected rail monitoring system device. The measuring divides the little the control unit MCU of built -in to connect DA sine wave generator, and DA sine wave generator's output passes through the digital filtering module and connects the power amplification module, and the power amplification module is passed through the transformer isolation and is carried the rail, detecting the host computer and passing through wave filter connection lock -in amplifier by coupling transformer, lock -in amplifier passes through integrating circuit and connects AD converting circuit, detect host computer quantity and be 2, detect extension quantity and be 1. This system device, to rail control in time, accurate, reduce the cost of labor by a wide margin.
Description
Technical field
This patent relates to railway security monitoring device, is specially a kind of rail break monitoring system device.
Background technology
Rail is in operation and receives the impact of train and being probably of rail break occur, easily causes serious railway accident if can not find in time to report to the police to change.The generation of rail break is the most unexpected, it is difficult to monitor in time.Current railway security monitoring needs substantial amounts of staff timing to patrol and examine railway, and it manually expends very big, and manpower is monitored its accuracy and be there is also serious unstability.Under the background that cost of labor grows to even greater heights, develop a set of rail break device requirement accurate, quick, low cost the strongest.
Summary of the invention
This patent is for above technical problem, it is provided that a kind of rail break monitoring system device, utilizes single-frequency phase shift sine wave detection signal quick and precisely to monitor rail state, reduces accident rate, reduce monitoring cost.
The concrete technical scheme of this patent is as follows:
Rail break monitoring system device, it is made up of detection extension set, detection main frame, it is characterized in that: in detection extension set, micro-control unit MCU connects DA sine-wave generator, the outfan of DA sine-wave generator connects power amplifier module by digital filtering module, and power amplifier module is transported to rail by transformer isolation；Detection main frame is connected lock-in amplifier by coupling transformer by wave filter, and lock-in amplifier connects A/D convertor circuit by integrating circuit；Detection host number is 2, and detection extension set quantity is 1, and lightning-protection module, solar electrical energy generation module provide power supply to detection extension set, detection main frame.
In specifically used, one two receipts, one transmission of a detector segments, two receptions.Transmission is positioned at B point, receives at A point and C point.Rail is divided into several 8Km detector segments, sender unit is installed in the middle part of each detector segments, sends 420(370) Hz single-frequency phase shift sine wave detection signal, within every two seconds, send once, 2 seconds each persistent period.Adjacent interval signal uses different frequency isolation.After discharger sends signal, signal is propagated to the left and right along rail.
When detector segments takies without car, intact with when rupturing at rail, receive the voltage swing difference that device receives.Testing circuit gathers that rail is intact and voltage signal amplitude size during rail break, and judges whether rail fractures by GPRS transmission to station monitoring equipment.If running into rail break, the signal amplitude that reception device receives significantly reduces.
Owing to using battery to power, send signal and use interval to send, within 2 seconds, send, 2 seconds sleep patterns.It is thus desirable to signal is carried out digital phase shift, it is ensured that receiving terminal can homophase.
Detect every 4 seconds collection rail temperature of extension set and cell voltage and transmission level, as changed greatly, upload host computer by wireless.
Signal is amplified, send MCU, through AD conversion, digital filtering after filtering and phase-locked amplification, it may be judged whether have rail break to occur.If any, host computer will be uploaded by wireless.When incoming level, cell voltage and rail temperature change greatly, also will be uploaded by wireless.
Host computer realized the functions such as car identification, rail break warning.Whenever having rail break to occur, system automatic spring alert box voice message.Meanwhile, this information is reached work business production management system by system.
By data base and production management system interface, rail break is reported to the police, equipment state obtains synchronized update in production management system.
Accompanying drawing explanation
Fig. 1 is this patent structural representation.
Fig. 2 is the structural representation of single-frequency phase shift sine wave detection signal generator in this patent.
Fig. 3 is the structural representation of single-frequency phase shift sine wave detection signal receiver in this patent.
Wherein, 1 detection extension set, 2 detection main frame, 3 rails, 4 amplification modules, 5 AD conversion module, 6 digital filtering modules, 7 wave filter, 8 lock-in amplifiers, 9 integrating circuit.
Detailed description of the invention
Below in conjunction with detailed description of the invention, this patent is described further.
Rail break monitoring system device, it is made up of detection extension set, detection main frame, it is characterized in that: in detection extension set, micro-control unit MCU connects DA sine-wave generator, the outfan of DA sine-wave generator connects power amplifier module by digital filtering module, and power amplifier module is transported to rail by transformer isolation；Detection main frame is connected lock-in amplifier by coupling transformer by wave filter, and lock-in amplifier connects A/D convertor circuit by integrating circuit；Detection host number is 2, and detection extension set quantity is 1, and lightning-protection module, solar electrical energy generation module provide power supply to detection extension set, detection main frame.
Rail is intact with when fractureing, and signal should have significant change；Can correct identification source under electrified disturbed condition.
First should select suitable signal frequency, signal preach test side time decay as far as possible little.When using electrical signal detection rail break, due to rail every meter equivalent inductance milihenry more than ten, and every kilometer of rail and railway roadbed bleeder resistance 0.6 ohm.If selecting frequency f=20Khz, then every kilometer of rail impedance Z=2pifL=2 × 3.14 × 20 × 1000 × 0.01 × 1000 Ω=1.3M Ω, if signal source 12V, ten microvolts of receiving terminal level, electrified section is difficult to process.Therefore system signal source uses 420Hz frequency, can reach hundreds of millivolt at 4 km signals；Secondly detection is not carried out at signal source, and is detecting away from signal source；Finally send signal amplitude the biggest.
Second Problem to be solved, needs frequency acquisition, uses narrow-band filtering or FFT to carry out spectrum analysis, can partly solve problem, helpless for co-channel interference.Signal in addition to frequency parameter, also phase parameter.By frequency and the phase place of detection signal, can significantly suppress noise, improve detection signal-to-noise ratio.
Citing, signal source B is 2Km away from detection device A and C.MCU produces 420Hz/370Hz sinusoidal signal by DA conversion, and filtered shaping, power amplification, transformer isolation are delivered to rail.For increasing equipment dependability, use two-way output form, wherein a road backup.Signal source floating voltage 10V, maximum 2A.
Rail signal through transformer coupled, bandpass filtering, phase sensitive detection, amplification, be AD converted after integrating circuit.
After signal AD conversion, through digital filtering, obtain the upward peak of waveform and lower peak value, calculate its difference.According to wide wood strip result of the test, its value 1.54V when rail is intact, when fractureing at signal source 300m, signal 940mv, rail is intact and the signal intensity that fractures is obvious.
Power supply may be used without limited Alternating Current Power Supply, uses solar energy in the case of unconditional.The interval all devices of detection passes to station extension set by GPRS and processes, reports to the police.Extension set data upload Railway Bureau, track division, locomotive simultaneously.Hole ∮ 10 in steel rail web position, uses squash type connected nail, and the non-maintaining connecting line of anticorrosion is fastened on connected nail.When changing rail, can effectively save use cost.
Battery, solar panels, do not having power configuration local, according to power consumption demand, using 1 12V26Ah accumulator and solar panels.
Use road internal standard SMC composite XB-1 case (long 496mm × wide 415mm × high 291mm), there is fire-retardant, antirust, ageing-resistant, lightweight, good insulating, and the advantage such as impact resistance is strong.Rail limit case built-in Monitoring and Controlling box, the home being installed on outside track clearance.
In April, 2015, build test platform at wide wood strip, install one at K2+400 and receive device, at K4+100, dispensing device is installed, insulation joint (simulation rail rail break) is installed at K3+100.Result shows:
(1) accuracy rate: 98%, without failing to report.
(2) the rail break detection time :≤1 minute, uplink time :≤5 minutes.
(3) detect signal: sinusoidal wave, frequency 420(370) Hz, 2 seconds interval times
(4) adapt to ambient temperature :-20～60(DEG C).
(5) battery capacity: 12V/24AH.
(6) solar panels: 60W.
Every 2 days, systematic parameter is measured, and in host computer facilities for observation ruuning situation, within every more than 10 days, do a breaking test.
Test in Chengdu North locomotive depot, check and cab signal is affected, at Chengdu North locomotive depot loop wire, one monitoring main frame and monitoring unit are installed, observe cab signal and show.Result shows: whether equipment works, and cab signal is normal.
Claims (1)
1. rail break monitoring system device, it is made up of detection extension set, detection main frame, it is characterized in that: in detection extension set, micro-control unit MCU connects DA sine-wave generator, the outfan of DA sine-wave generator connects power amplifier module by digital filtering module, and power amplifier module is transported to rail by transformer isolation；Detection main frame is connected lock-in amplifier by coupling transformer by wave filter, and lock-in amplifier connects A/D convertor circuit by integrating circuit；Detection host number is 2, and detection extension set quantity is 1, and lightning-protection module, solar electrical energy generation module provide power supply to detection extension set, detection main frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620196099.1U CN205417654U (en) | 2016-03-15 | 2016-03-15 | Disconnected rail monitoring system device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620196099.1U CN205417654U (en) | 2016-03-15 | 2016-03-15 | Disconnected rail monitoring system device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106828535A (en) * | 2016-12-14 | 2017-06-13 | 中国铁道科学研究院电子计算技术研究所 | A kind of track rail break monitoring system and rail break method for detecting position |
| CN107933617A (en) * | 2017-09-26 | 2018-04-20 | 上海新海信通信息技术有限公司 | A kind of railway track broken rail monitoring method |
-
2016
- 2016-03-15 CN CN201620196099.1U patent/CN205417654U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106828535A (en) * | 2016-12-14 | 2017-06-13 | 中国铁道科学研究院电子计算技术研究所 | A kind of track rail break monitoring system and rail break method for detecting position |
| CN107933617A (en) * | 2017-09-26 | 2018-04-20 | 上海新海信通信息技术有限公司 | A kind of railway track broken rail monitoring method |
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