CN102556117A - Passive ground sensor for railway shunting monitoring system - Google Patents
Passive ground sensor for railway shunting monitoring system Download PDFInfo
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- CN102556117A CN102556117A CN2011104416436A CN201110441643A CN102556117A CN 102556117 A CN102556117 A CN 102556117A CN 2011104416436 A CN2011104416436 A CN 2011104416436A CN 201110441643 A CN201110441643 A CN 201110441643A CN 102556117 A CN102556117 A CN 102556117A
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Abstract
The invention relates to a passive ground sensor for a railway shunting monitoring system. A complete machine circuit is composed of 2 rectification filter circuits, 2 relays and 3 radio circuits. Each radio circuit is formed by connecting an identity card (ID) storage chip and an inductance-capacitance (LC) oscillating circuit, the input end of a rectification filter circuit A is connected with a current transformer L1, and the output end of the rectification filter circuit A is connected with a coil of a relay J1; and the input end of a rectification filter circuit B is connected with a current transformer L2, and the output end of the rectification filter circuit B is connected with a coil of a relay J2. The passive ground sensor is arranged on a signal receiving device of the passive ground signal sensor and a locomotive, not only changes no line signal, but also enables signals to be accurately transmitted to signal receiving equipment of the locomotive, and enables the monitoring system to stably and reliably work. The ground sensor does not emit electromagnetic waves initiatively, thereby being free of electromagnetism pollution on the environment.
Description
Technical Field
The invention relates to a ground shunting signal detection device of a railway shunting monitoring system, in particular to a passive ground sensor for the railway shunting monitoring system.
Background
At present, a train operation monitoring and recording device is widely adopted in a whole-road locomotive system, and the safety factor of locomotive operation is greatly improved. The aims of high efficiency, rapidness and safety of railway transportation are fulfilled. However, in the current shunting operation process and the process of the locomotive entering and exiting the garage, the ground shunting signal and the locomotive train operation monitoring and recording device can not be interlocked to carry out safety control due to the limitation of the track circuit condition in the station, and the problem to be solved in the safety production aspect of relevant departments of the railway is urgent. During shunting operation, a shunting worker is mainly used for confirming a ground shunting signal. Once the operation of the operator is wrong, accidents such as flushing, squeezing and falling are easily caused. Similarly, when the locomotive is shunting or is going out of the garage, the locomotive crew must look at the ground shunting signal, and the locomotive signal cannot be correctly distinguished due to negligence of the locomotive crew or interference of external conditions such as weather. The situation of driving accidents or major accidents caused by the locomotive signals is occasionally happened. Causing great loss and influencing the normal operation of transportation.
How to transmit the ground shunting signal to the locomotive and control the locomotive. Is a difficult problem at present. At present, the railway main track of China realizes locomotive signal display in a track receiving mode. However, the railway station and the freight yard have complicated lines, so that locomotive signal display cannot be realized in a track receiving mode. If the technology of coding in the station is realized, a great deal of reconstruction needs to be carried out on the signal equipment of the station, the engineering quantity and the investment are considerable, and the technology cannot be realized under the current conditions.
Therefore, in order to solve the above problems, it is necessary to improve or redesign the ground shunting signal detecting device of the railway shunting monitoring system, which has been a problem in the art.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and solve the problems of the prior art, and provides a ground shunting signal detection device of a railway shunting monitoring system, namely a passive ground sensor, so that the shunting monitoring system transmits shunting signals to locomotive vehicle-mounted communication equipment through a specific passive ground sensor on the premise of not changing line signals, the shunting signals are transmitted to a train operation monitoring and recording device, and corresponding instructions are sent out through the train operation monitoring and recording device to realize the control of a locomotive.
The invention is realized by the following technical scheme: a passive ground inductor for railway shunting monitored control system, including complete machine circuit, its characterized in that: the whole machine circuit consists of 2 rectifying and filtering circuits, 2 relays and 3 radio frequency circuits;
the input end of the rectification filter circuit A is connected with a current transformer L1; the output end of the relay is connected with a coil of a relay J1;
the input end of the rectifying and filtering circuit B is connected with a current transformer L2; the output end of the relay is connected with a coil of a relay J2;
the radio frequency circuit 1, the radio frequency circuit 2 and the radio frequency circuit 3 have the same circuit structure, and the radio frequency circuit is formed by connecting an ID card storage chip and an LC oscillation circuit; LC oscillating circuits in the radio frequency circuit 1 and the radio frequency circuit 2 are respectively connected in series with normally open contacts of a relay J1 and a relay J2;
an LC oscillating circuit in the radio frequency circuit 3 is connected with a normally closed contact of a relay J1 and a normally closed contact of a relay J2 in series;
ID card memory chips in 3 radio frequency circuits can be directly connected in parallel with two ends of a capacitor of the LC oscillation circuit, and the work of the radio frequency circuits is controlled by utilizing normally open or normally closed contacts of a relay to cut off the LC oscillation circuit;
or, the ID card storage chips in the 3 radio frequency circuits are connected in parallel to two ends of a capacitor of the LC oscillating circuit through normally closed contacts or normally open contacts of the relay J1 and the relay J2, and the power supply circuit from the capacitor to the ID card storage chips is cut off by utilizing the normally open contacts or normally closed contacts of the relays to control the work of the radio frequency circuits.
The two methods can realize the on-off control of the radio frequency circuit by the relay.
The invention has the beneficial effects that: the railway shunting monitoring system transmits shunting signals to the locomotive through a specific passive ground sensor on the premise of not changing line signals, sends the shunting signals to a train operation monitoring and recording device, and sends corresponding instructions through the train operation monitoring and recording device to realize the control of the locomotive. The invention has the advantages of small engineering quantity, low investment and quick effect. On passive ground signal inductor and inductor on locomotive, it can not change line signal, but also can accurately transmit the signal to locomotive, so that the monitoring system device can attain stable and reliable operation. Because the ground sensor does not need to supply power during working, only a mutual inductor sleeved on a filament circuit of a signal lamp is needed to sense the change of the signal state, and ground signal equipment is not directly electrically connected, the ground signal interlocking equipment and shunting signals are not affected, and the structure, the performance and the technical index of the equipment are not changed. The ground sensor does not actively emit electromagnetic waves, and does not have electromagnetic pollution to the environment.
Drawings
FIG. 1 is a block diagram A of a passive ground sensor;
fig. 2, structural block diagram B of the passive ground sensor.
Detailed Description
For a more clear understanding of the invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings and examples:
as shown in fig. 1 and 2, the whole circuit of the passive ground sensor is composed of 2 rectifying and filtering circuits, 2 relays and 3 radio frequency circuits;
the input end of the rectification filter circuit A is connected with a current transformer L1; the output end of the relay is connected with a coil of a relay J1;
the input end of the rectifying and filtering circuit B is connected with a current transformer L2; the output end of the relay is connected with a coil of a relay J2;
the 3 radio frequency circuits have the same structure and are formed by connecting an ID card storage chip and an LC oscillation circuit; wherein,
an LC oscillating circuit in the radio frequency circuit 1 is connected in series with a normally open contact of a relay J1;
an LC oscillating circuit in the radio frequency circuit 2 is connected in series with a normally open contact of a relay J2;
an LC oscillating circuit in the radio frequency circuit 3 is connected with a normally closed contact of a relay J1 and a normally closed contact of a relay J2 in series;
ID card memory chips in 3 radio frequency circuits can be directly connected in parallel with two ends of a capacitor of the LC oscillating circuit; or the ID card memory chip is connected in parallel with the two ends of the capacitor of the LC oscillating circuit after passing through the normally open or normally closed contact of the series relay J1 or the relay J2.
The two methods can realize the on-off control of the radio frequency circuit by the relay.
The 3 radio frequency circuits of the passive ground signal sensor respectively represent a blue lamp, a white lamp and no lamp (signal fault), in addition, on a line without a signal machine, a soil block, a passive speed limit point and the like can be represented through specific codes, and the contents represented by the 3 radio frequency circuits can be embodied in the codes of the respective ID card storage chips.
In addition, the on-off of each radio frequency circuit is controlled by devices such as a current transformer and a relay, and the information transmission of the state of the signal lamp is realized.
The connection mode shown in figure 1 is to control the operation of the radio frequency circuit by using the normally open or normally closed contact of the relay to cut off the oscillation loop of the LC of the radio frequency circuit,
the connection mode shown in figure 2 is that the normally open or normally closed contact of the relay is used for cutting off the power supply line from the capacitor to the ID card storage chip to control the work of the radio frequency circuit
The key technology of the invention is to control the on-off of the radio frequency circuit by using a normally open or normally closed contact of the relay. The radio frequency circuit is provided with a 125Khz oscillating circuit consisting of LC, the circuit parameter requirement is very strict, and other components are connected in series in the circuit to have very large influence on the circuit. The oscillation frequency of the oscillation circuit can be changed, and if the frequency change exceeds an allowable range, the data of the ID card memory chip in the radio frequency circuit can not be read. The type of relay and the length of the wiring have an effect on this. Therefore, a large amount of experiments are carried out on the circuit in the early stage, the types of the connected relays are selected, the length of the wiring is shortened, and the like. Finally, we selected AQW614, AK74
Two types of relays. The two relays have small power consumption and small volume. The contact resistance of the contact is small, and the requirement of a circuit is completely met.
The current transformer L1 and the current transformer L2 respectively sense filament currents of a blue lamp and a white lamp, when the blue lamp or the white lamp is on, the relay J1 or the relay J2 is attracted, the normally open contact is closed, the normally closed electric shock is disconnected, and the corresponding radio frequency circuit is connected at the moment. When the sensor on the locomotive approaches the ground sensor, the 125Khz frequency signal sent by the sensor on the locomotive is electromagnetically coupled with the passive ground sensor, so that the LC resonance circuit of the passive ground sensor generates oscillating current to supply power for the ID card memory chip of the ground sensor, and the information code in the ID card memory chip of the ground radio frequency circuit is transmitted to the sensor on the locomotive.
If the signal is faulty when neither the blue lamp nor the white lamp is on, the radio frequency circuit 3 is connected. Received when the locomotive passes is information (failure information) of the radio frequency circuit 3.
The current transformer is the 2 nd key technology of the invention, the current transformer is a device for inducing filament current, but at present, the railway signal lamps all use light emitting diodes as the light source of the signal machine, the input voltage of the signal machine is AC220V, the current is 130mA, the difficulty of the current transformer inducing the small current is very large, and the secondary side of the current transformer is required to drive at least 3 relays to work. A large number of experiments were performed on the structure of the transformer, the material of the iron core, the number of turns of the coil, and the like. Finally, the iron core is determined to adopt the nano technology to realize the technical breakthrough. The system requirement is guaranteed, and at present, one transformer can drive 4 relays to normally work.
The invention uses two-way radio frequency technology to complete the digital identification of ground signal, not only does not change the line signal, but also can accurately transmit the signal to the locomotive, thus the monitoring system can achieve stable and reliable work.
The acquisition process of the ground shunting signal state comprises the following steps: and a power line of the signal lighting unit passes through a central hole of the current transformer. When the signal lamp is on, the output signal of the secondary side of the current transformer drives the micro relay of the ground inductor to work, and different resonant circuits (namely blue and white lamps and signal faults) are switched. The ground sensor can be placed at a distance of 1-100 meters from the ground signal machine, and the distance can be adjusted according to different conditions. Meanwhile, a plurality of ground sensors can be placed in the distance, and the secondary side output of the current transformer is connected with the ground sensors through cables.
When the inductor on the locomotive is close to the ground inductor, electromagnetic coupling occurs, so that the resonant circuit of the ground inductor generates oscillating current to supply power for the ID card storage chip of the ground inductor, and the ground inductor sends out corresponding character strings. Meanwhile, the sensor on the locomotive receives the corresponding character string, and the information is processed by the railway shunting monitoring host and then is transmitted to the original locomotive monitoring device for monitoring through a 485 (or CAN) communication port.
The invention applies the digital radio frequency technology to train operation and railway station shunting operation, applies the technology to the identification of shunting signals, and accurately transmits the identified signals to a train operation monitoring and recording device.
The ground equipment is provided with an LC resonance circuit, the frequency of the LC resonance circuit is the same as the frequency transmitted by an inductor on the locomotive, under the excitation of electromagnetic waves transmitted by the locomotive inductor, the LC resonance circuit generates resonance, so that charges are generated at two ends of a capacitor, when the accumulated charges reach more than 2V, the capacitor can be used as a power supply to provide working voltage for an ID card storage chip in which a ground shunting signal identification code is stored, the data of the ID card storage chip is transmitted out, at the moment, the inductor on the locomotive receives the information and carries out corresponding processing through a microprocessor, and the state of the shunting signal is judged to be transmitted to a train operation monitoring and recording device.
In light of the above description, it is believed that the present invention will be embodied in conjunction with the techniques described herein.
Claims (2)
1. A passive ground inductor for railway shunting monitored control system, including complete machine circuit, its characterized in that: the whole machine circuit consists of 2 rectifying and filtering circuits, 2 relays and 3 radio frequency circuits; the input end of the rectification filter circuit A is connected with a current transformer L1; the output end of the relay is connected with a coil of a relay J1; the input end of the rectifying and filtering circuit B is connected with a current transformer L2; the output end of the relay is connected with a coil of a relay J2; the radio frequency circuit 1, the radio frequency circuit 2 and the radio frequency circuit 3 have the same circuit structure, and the radio frequency circuit is formed by connecting an ID card storage chip and an LC oscillation circuit; LC oscillating circuits in the radio frequency circuit 1 and the radio frequency circuit 2 are respectively connected in series with normally open contacts of a relay J1 and a relay J2; an LC oscillating circuit in the radio frequency circuit 3 is connected with a normally closed contact of a relay J1 and a normally closed contact of a relay J2 in series; ID card memory chips in 3 radio frequency circuits can be directly connected in parallel with two ends of a capacitor of the LC oscillation circuit, and the work of the radio frequency circuits is controlled by utilizing normally open or normally closed contacts of a relay to cut off the LC oscillation circuit; or, the ID card storage chips in the 3 radio frequency circuits are connected in parallel to two ends of a capacitor of the LC oscillating circuit through normally closed contacts or normally open contacts of the relay J1 and the relay J2, and the power supply circuit from the capacitor to the ID card storage chips is cut off by utilizing the normally open contacts or normally closed contacts of the relays to control the work of the radio frequency circuits.
2. The passive ground sensor for a railway shunting monitoring system of claim 1, wherein: an LC oscillating circuit in the radio frequency circuit 1 is connected in series with a normally open contact of a relay J1; an LC oscillating circuit in the radio frequency circuit 2 is connected in series with a normally open contact of a relay J2; the LC oscillating circuit in the radio frequency circuit 3 is connected in series with the normally closed contact of the relay J1 and the normally closed contact of the relay J2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110441643.6A CN102556117B (en) | 2011-12-26 | 2011-12-26 | Passive ground sensor for railway shunting monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110441643.6A CN102556117B (en) | 2011-12-26 | 2011-12-26 | Passive ground sensor for railway shunting monitoring system |
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| CN102556117A true CN102556117A (en) | 2012-07-11 |
| CN102556117B CN102556117B (en) | 2015-03-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104464451A (en) * | 2014-12-12 | 2015-03-25 | 柳州铁道职业技术学院 | Railway locomotive signal lighting demonstration system |
| CN113147839A (en) * | 2021-04-26 | 2021-07-23 | 天津开发区文博电子有限公司 | Passive ground sensor code definition and arrangement method for railway shunting monitoring system |
Citations (4)
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|---|---|---|---|---|
| JP2008029143A (en) * | 2006-07-24 | 2008-02-07 | Hitachi Ltd | Train operation system and ground side operation device |
| JP2009166671A (en) * | 2008-01-16 | 2009-07-30 | Nippon Signal Co Ltd:The | Train control device |
| JP2010206942A (en) * | 2009-03-03 | 2010-09-16 | Railway Technical Res Inst | Automatic train control system |
| CN202413849U (en) * | 2011-12-26 | 2012-09-05 | 天津开发区文博电子有限公司 | Passive ground inductor for railway shunting monitoring system |
-
2011
- 2011-12-26 CN CN201110441643.6A patent/CN102556117B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008029143A (en) * | 2006-07-24 | 2008-02-07 | Hitachi Ltd | Train operation system and ground side operation device |
| JP2009166671A (en) * | 2008-01-16 | 2009-07-30 | Nippon Signal Co Ltd:The | Train control device |
| JP2010206942A (en) * | 2009-03-03 | 2010-09-16 | Railway Technical Res Inst | Automatic train control system |
| CN202413849U (en) * | 2011-12-26 | 2012-09-05 | 天津开发区文博电子有限公司 | Passive ground inductor for railway shunting monitoring system |
Non-Patent Citations (2)
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| 《科技信息》 20071231 段金辉 "监控装置在调车状态下失控问题的解决" 22、34 1-2 , 第30期 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104464451A (en) * | 2014-12-12 | 2015-03-25 | 柳州铁道职业技术学院 | Railway locomotive signal lighting demonstration system |
| CN113147839A (en) * | 2021-04-26 | 2021-07-23 | 天津开发区文博电子有限公司 | Passive ground sensor code definition and arrangement method for railway shunting monitoring system |
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| CN102556117B (en) | 2015-03-04 |
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