CN110949446A - Control circuit and method for electronic turnout - Google Patents

Abstract

The embodiment of the invention discloses a control circuit and a method of an electronic turnout, wherein the control circuit comprises: the system comprises a solid-state relay, a safety relay group and a current detector; the first end of each solid-state relay is connected with each corresponding current detector; all the current detectors are connected with the safety relay group; the safety relay group is connected with the switch machine through a plurality of signals and outputs the representation information of the switch machine corresponding to each signal. The embodiment of the invention obtains the representation information of the point switch through the control circuit of the electronic point switch consisting of the solid-state relay, the safety relay group and the current detector, is used for controlling the electronic point switch, and improves the safety control of the point switch and the intelligent diagnosability and maintainability of the control system and the point switch.

Description

Control circuit and method for electronic turnout

Technical Field

The invention relates to the technical field of communication, in particular to a control circuit and a control method for an electronic turnout.

Background

At present, the development speed of railways in China is faster and faster, and particularly, the requirement on the performance of railway equipment is higher and higher due to the construction of urban rail transit. Meanwhile, with the continuous development of advanced technologies such as computer communication, electronic information technology, automatic detection, power electronic switches and the like, the method is more favorable for improving the safety, reliability and intelligent diagnosis maintainability of railway signal technology. In order to meet the strict requirement of rapid development of railways on interlocking equipment, the all-electronic turnout control is the direction of the development of the existing interlocking system.

In the prior art, turnout control circuits are basically combined logics of gravity relays, the fixed operation and the reverse operation of a point switch, and the fixed operation and the reverse operation of the point switch are realized through a gravity relay gravity set, and meanwhile, the control circuit is guided to a safety side by utilizing the characteristic that the gravity relay is lost. However, since the interface relay passes a high voltage of 380VAC and has a relatively large power, the relay node is easily stuck, and the interface relay needs to be replaced and maintained periodically. Meanwhile, the relay logic has the following problems: the turnout position is determined only by indicating the polarity of the diode, which is simple, and under certain specific conditions, an external circuit can form the characteristic of the diode, so that false indication is caused, and the safety of the system is influenced; secondly, the turnout control circuit is not provided with a matched lightning protection circuit, so that faults are easily caused by lightning; finally, the turnout control circuit belongs to the relay interlocking category, the system is complex in wiring, and in addition, faults of the relay occur frequently due to reasons such as process materials and the like, so that the reliability of the turnout control circuit is low. The problems seriously affect the reliability and safety of the existing turnout control circuit, but the turnout control circuit has the highest technical requirement and the strongest fault protection capability in the field of railway signal control.

In conclusion, the interface relay occupies a large space, is complex in wiring, has a long system construction period and high energy consumption, and is complex in combined interface circuit, so that the trouble shooting of the turnout control is difficult, and the trouble shooting is difficult to diagnose.

Disclosure of Invention

Because the existing method has the problems, the embodiment of the invention provides a control circuit and a control method of an electronic turnout.

In a first aspect, an embodiment of the present invention provides a control circuit for an electronic switch, including: the system comprises a solid-state relay, a safety relay group and a current detector;

the first end of each solid-state relay is connected with each corresponding current detector;

all the current detectors are connected with the safety relay group;

the safety relay group is connected with the switch machine through a plurality of signals and outputs the representation information of the switch machine corresponding to each signal.

Optionally, a second terminal of each solid-state relay is connected to the power supply, and a third terminal is connected to the CPU.

Alternatively, the safety relay group is connected to the switch machines through five signals from X1 to X5, and outputs the indication information of the switch machines corresponding to the five signals.

In a second aspect, an embodiment of the present invention further provides a method for controlling a control circuit of an electronic turnout, including:

if the analytic results of the two CPUs are the same and the solid-state relay and the safety relay set are closed in place, detecting the current of the point switch in real time;

if the current of the point switch is detected to be free from the default and the point switch is operated in place, closing the solid-state relay;

and controlling the safety relay group to guide the indication position, outputting indication information of the point switch, and controlling the electronic turnout according to the indication information of the point switch.

Optionally, the control method further includes:

after receiving an operation command of a point switch, a first CPU analyzes the operation command to obtain a first analysis result;

after receiving an operation command of the point switch, the second CPU analyzes the operation command to obtain a second analysis result;

correspondingly, if the analysis results of the two CPUs are the same and the solid-state relay and the safety relay set are both closed in place, the current of the point switch is detected in real time, and the method specifically comprises the following steps:

and if the first analysis result is the same as the second analysis result and the solid-state relay and the safety relay set are closed in place, detecting the current of the point switch in real time.

Optionally, if it is determined that the analysis results of the two CPUs are the same and the solid-state relay and the safety relay set are both closed in place, detecting the current of the switch machine in real time specifically includes:

if the analysis results of the two CPUs are judged to be the same, whether the solid-state relay is short-circuited is detected;

if the solid-state relay is not short-circuited, controlling the safety relay group, and detecting whether the solid-state relay and the safety relay group are closed in place or not;

and if the solid-state relay and the safety relay group are closed in place, detecting the current of the point switch in real time.

Optionally, if it is determined that the analysis results of the two CPUs are the same, after detecting whether the solid-state relay is short-circuited, the method further includes:

and if the solid-state relay is short-circuited, controlling the short-circuited solid-state relay to be guided to the safety side.

Optionally, if the solid-state relay is not short-circuited, controlling the safety relay set, and after detecting whether the solid-state relay and the safety relay set are closed in place, the method further includes:

and if the safety relay group is not closed in place, controlling the safety relay group which is not closed in place to shut down and guiding to the safety side.

Optionally, after the controlling the safety relay group to indicate the position, outputting indication information of the switch machine, and controlling the electronic switch according to the indication information of the switch machine, the controlling method further includes:

and controlling the point switch to guide to the safety side, and controlling the first CPU and the second CPU to stop sending dynamic pulses to the power supply so as to cut off the external output of the solid-state relay and the safety relay group.

Optionally, after the controlling the safety relay group to indicate the position, outputting indication information of the switch machine, and controlling the electronic switch according to the indication information of the switch machine, the controlling method further includes:

and if the switch machine is judged to be turned to the position, detecting the position of the switch machine.

According to the technical scheme, the embodiment of the invention obtains the representation information of the point switch through the control circuit of the electronic point switch consisting of the solid-state relay, the safety relay group and the current detector, and is used for controlling the electronic point switch, so that the safety control of the point switch, and the intelligent diagnosability and maintainability of the control system and the point switch are improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a control circuit of an electronic turnout according to an embodiment of the present invention;

fig. 2 is a schematic flow chart of a control method of a control circuit of an electronic turnout according to an embodiment of the present invention;

fig. 3 is an interactive schematic diagram of a control circuit of an electronic switch according to an embodiment of the present invention.

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

Specifically, in the conventional positioning representation, when the node groups in row 1 and row 3 of the switch machine are turned on, and at this time, assuming that 3 pins representing the transformer are output, the 3 pins are connected to X2 through a resistor, enter the switch machine, pass through the automatic switch, pass through a diode and a resistor, enter the automatic switch node again through a terminal, pass through the motor coil, and are output from X1 back to the other end representing the transformer. One end of DBJ is connected to the circuit of the transformer through the joint 2DQJ, the other end enters the switch machine through the terminal, and is connected to the loop from the neutral point of the motor through the joint of the automatic switch, so the DBJ and the diode and the resistor in the switch machine form a parallel circuit; because the DBJ is a current-biased relay, the DBJ relay can only be reliably picked up if both circuits are complete. In this state, the X3 terminal is connected to the contact connected to the electric motor through the contact of the automatic shutter, that is to say the switch machine has the ability to turn from positioning to reverse.

In the existing positioning reverse-position rotating diagram, after a console sends a command of starting to reverse position, a relay acts, when 1DQJ sucks up, DBJ falls down, and 1DQJF sucks up; after the 1DQJF is sucked up, the 2DQJ pole-switching is sucked up, the three-phase power supply is switched on, the BHJ is sucked up, and the 1DQJ forms a self-closed circuit. After the three-phase power supply is connected, the phase A enters a point switch from a terminal X1 and is connected with a motor coil; phase B enters the switch machine from a terminal X4 and is communicated with coils V1-V2 of the motor through a contact point of the automatic switch; the phase C enters from the terminal X3 and is connected with the coil of the motor through the contact of the automatic switch; the motor is driven to rotate. After the turnout is converted into the reverse state and locked, the node groups of the 2 nd row and the 4 th row of the automatic switch of the switch machine are switched on, the node groups of the 1 st row and the 3 rd row are switched off, and the three-phase power is switched off. After the three-phase power is cut off, BHJ falls, then 1DQJ and 1DQJF fall successively, and FBJ sucks up.

Therefore, in the prior art, the indication of the position of the turnout is determined only by indicating the polarity of the diode, which is simple, and under certain specific conditions, an external circuit can form the characteristic of the diode, so that 'false' indication is caused, and the safety of the system is influenced; secondly, the turnout control circuit is not provided with a matched lightning protection circuit, so that faults are easily caused by lightning; finally, the turnout control circuit belongs to the relay interlocking category, the system is complex in wiring, and in addition, faults of the relay occur frequently due to reasons such as process materials and the like, so that the reliability of the turnout control circuit is low. The problems seriously affect the reliability and safety of the existing turnout control circuit, but the turnout control circuit has the highest technical requirement and the strongest fault protection capability in the field of railway signal control.

Fig. 1 shows a schematic structural diagram of a control circuit of an electronic switch provided in this embodiment, including: the system comprises a solid-state relay, a safety relay group and a current detector;

the first end of each solid-state relay is connected with each corresponding current detector;

all the current detectors are connected with the safety relay group;

the safety relay group is connected with the switch machine through a plurality of signals and outputs the representation information of the switch machine corresponding to each signal.

Specifically, as shown in fig. 1, the control circuit of the electronic turnout provided by this embodiment includes 3 solid-state relays, each of which is connected to a current detector, and the current of the path is detected by the current detector.

The embodiment obtains the representation information of the point switch through the control circuit of the electronic switch consisting of the solid-state relay, the safety relay group and the current detector, is used for controlling the electronic switch, improves the safety control of the switch, and improves the intelligent diagnosability and maintainability of the control system and the point switch.

Further, on the basis of the above embodiment, the second terminal of each solid-state relay is connected to the power supply, and the third terminal is connected to the CPU.

The safety relay group is connected with the switch machine through five paths of signals from X1 to X5, and simultaneously outputs the representation information of the switch machine corresponding to the five paths of signals.

Wherein, X1 to X5 represent the representation information of the switch machine detected by the control circuit, and the representation information is detected by a dynamic detection method.

The control circuit of the electronic turnout provided by the embodiment has the advantages of small equipment volume, low energy consumption, simplicity and convenience in construction, complete monitoring function, diagnosable fault, safe guidance and less field maintenance, and meanwhile has an internal self-checking function, so that the safety of the system can be improved by controlling the fault inside each link, the fault indication is in place through intelligent diagnosis, and the external networked communication networking is very convenient.

Fig. 2 is a schematic flow chart illustrating a control method of a control circuit of an electronic switch according to this embodiment, including:

s201, if the analytic results of the two CPUs are judged to be the same, and the solid-state relay and the safety relay set are closed in place, detecting the current of the point switch in real time;

s202, if the current of the point switch is detected to be free from the default and the point switch is operated in place, closing the solid-state relay;

and S203, controlling the safety relay group to guide the indication position, outputting indication information of the point switch, and controlling the electronic turnout according to the indication information of the point switch.

Specifically, as shown in fig. 3, which is an interactive schematic diagram of the control circuit of the electronic turnout provided in this embodiment, two CPUs (CPU1 and CPU2) receive an operation command of a switch machine through communication interfaces respectively, and analyze the operation command respectively to obtain two analysis results. And (4) interacting the analysis results through a communication channel between the two, and determining the correctness of the analysis command when the two analysis results are the same.

And after the correctness of the two CPU analysis commands is determined, judging whether the solid-state relay and the safety relay set are closed in place or not, and monitoring the current of the point switch in real time through a current detector when the solid-state relay and the safety relay set are both closed in place.

And after detecting that the current of the point switch is lack, judging whether the point switch is operated in place or not, if so, closing the solid-state relay, controlling the safety relay group to guide to the representation position, outputting the representation information of the point switch, and controlling the electronic turnout according to the representation information of the point switch.

The embodiment obtains the representation information of the point switch through the control circuit of the electronic switch consisting of the solid-state relay, the safety relay group and the current detector, is used for controlling the electronic switch, improves the safety control of the switch, and improves the intelligent diagnosability and maintainability of the control system and the point switch.

Further, on the basis of the above method embodiment, the control method further includes:

after receiving an operation command of a point switch, a first CPU analyzes the operation command to obtain a first analysis result;

after receiving an operation command of the point switch, the second CPU analyzes the operation command to obtain a second analysis result;

correspondingly, if the analysis results of the two CPUs are the same and the solid-state relay and the safety relay set are both closed in place, the current of the point switch is detected in real time, and the method specifically comprises the following steps:

and if the first analysis result is the same as the second analysis result and the solid-state relay and the safety relay set are closed in place, detecting the current of the point switch in real time.

Specifically, in this embodiment, after the CPU instructions of the two channels are compared and consistent, the dual CPUs output and control the safety relay group and the solid-state relay to control the operation of the switch machine. And corresponding output self-checking readback exists in the output of each step, and if a fault is detected, the module is guided to the safety side to cut off the external output. And detecting the current and the voltage of the switch machine simultaneously in the action process of the switch machine, and calculating the power of the switch machine in the action process. After the switch machine is turned to the position, the position of the switch machine can be detected.

Further, on the basis of the above method embodiment, if it is determined that the analysis results of the two CPUs are the same and the solid-state relay and the safety relay set are both closed in place, detecting the current of the switch machine in real time specifically includes:

if the analysis results of the two CPUs are judged to be the same, whether the solid-state relay is short-circuited is detected;

if the solid-state relay is not short-circuited, controlling the safety relay group, and detecting whether the solid-state relay and the safety relay group are closed in place or not;

if the solid-state relay and the safety relay group are closed in place, detecting the current of the point switch in real time;

if the safety relay group is not closed in place, controlling the safety relay group which is not closed in place to shut down and guiding to a safety side;

and if the solid-state relay is short-circuited, controlling the short-circuited solid-state relay to be guided to the safety side.

Further, on the basis of the above method embodiment, after the controlling the safety relay set to indicate the position, outputting indication information of the switch machine, and controlling the electronic switch according to the indication information of the switch machine, the method further includes:

controlling the point switch to guide to the safe side, and controlling the first CPU and the second CPU to stop sending dynamic pulses to the power supply so as to cut off the external output of the solid-state relay and the safety relay group;

and if the switch machine is judged to be turned to the position, detecting the position of the switch machine.

Specifically, the method comprises the following steps in the process of operating the switch machine:

a1, after the two CPUs receive the command for operating the switch machine and analyze the correctness of the command, the CPU interactive analysis commands of the two channels are compared to judge whether the command is consistent;

a2, if the CPU interactive analysis commands of the two channels are consistent, the two channels detect whether the solid-state relay is short-circuited, and if the solid-state relay is short-circuited, the solid-state relay is down and guided to the safety side;

a3, if the short circuit does not occur, operating the safety relay set, and simultaneously detecting whether the safety relay set is in place or not, if not, shutting down and guiding to a safety side;

a4, if the safety relay set is in place, operating 3 solid-state relays, and simultaneously detecting whether the solid-state relays are in place;

a5, if the solid relay is in place, detecting the action current of the switch machine in real time, and judging whether a defect item exists or not and the switch machine is in place;

a6, turning off 3 solid-state relays after detecting that a point switch is in place, and indicating the guidance of a safety relay group after detecting that 3 solid-state relays are in place;

when the switch machine is in place, the safety relay group of the control circuit also reaches the representation position, namely X1 to X5 represent representation information of the circuit detection switch machine, and the representation information is detected by a dynamic detection method.

A7, guiding to a safety side, wherein the CPU does not send dynamic pulses to the safety power supply, and the safety power supply does not output 24V _ safe; meanwhile, the solid-state relay and the safety relay can cut off the external output.

The control method of the control circuit of the electronic turnout provided by the embodiment adopts an intelligent diagnosis and self-checking method to detect the state of the control circuit and the state of the switch machine, so that the safety, reliability and usability of the system are improved.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

It should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A control circuit for an electronic switch, comprising: the system comprises a solid-state relay, a safety relay group and a current detector;

the first end of each solid-state relay is connected with each corresponding current detector;

all the current detectors are connected with the safety relay group;

the safety relay group is connected with the switch machine through a plurality of signals and outputs the representation information of the switch machine corresponding to each signal.

2. The control circuit of the electronic switch according to claim 1, wherein the second terminal of each solid-state relay is connected to a power supply, and the third terminal is connected to the CPU.

3. The control circuit of the electronic switch as claimed in claim 1, wherein the safety relay set is connected to the switch machine through five signals of X1 to X5, and outputs the indication information of the switch machine corresponding to the five signals.

4. A control method of a control circuit of an electronic switch according to any one of claims 1 to 3, comprising:

if the analytic results of the two CPUs are the same and the solid-state relay and the safety relay set are closed in place, detecting the current of the point switch in real time;

if the current of the point switch is detected to be free from the default and the point switch is operated in place, closing the solid-state relay;

and controlling the safety relay group to guide the indication position, outputting indication information of the point switch, and controlling the electronic turnout according to the indication information of the point switch.

5. The control method according to claim 4, characterized by further comprising:

after receiving an operation command of a point switch, a first CPU analyzes the operation command to obtain a first analysis result;

after receiving an operation command of the point switch, the second CPU analyzes the operation command to obtain a second analysis result;

correspondingly, if the analysis results of the two CPUs are the same and the solid-state relay and the safety relay set are both closed in place, the current of the point switch is detected in real time, and the method specifically comprises the following steps:

and if the first analysis result is the same as the second analysis result and the solid-state relay and the safety relay set are closed in place, detecting the current of the point switch in real time.

6. The control method according to claim 4, wherein if it is determined that the two CPUs have the same analysis result and the solid-state relay and the safety relay set are both closed in place, detecting the current of the switch machine in real time includes:

if the analysis results of the two CPUs are judged to be the same, whether the solid-state relay is short-circuited is detected;

if the solid-state relay is not short-circuited, controlling the safety relay group, and detecting whether the solid-state relay and the safety relay group are closed in place or not;

and if the solid-state relay and the safety relay group are closed in place, detecting the current of the point switch in real time.

7. The control method according to claim 6, wherein if the two CPUs have the same analysis result, after detecting whether the solid-state relay is short-circuited, the method further comprises:

and if the solid-state relay is short-circuited, controlling the short-circuited solid-state relay to be guided to the safety side.

8. The control method according to claim 6, wherein if the solid-state relay is not short-circuited, controlling the safety relay set, and detecting whether the solid-state relay and the safety relay set are closed in place, further comprising:

and if the safety relay group is not closed in place, controlling the safety relay group which is not closed in place to shut down and guiding to the safety side.

9. The control method according to claim 4, wherein after the controlling the safety relay group to indicate the position, outputting indication information of the switch machine, and controlling the electronic switch based on the indication information of the switch machine, the method further comprises:

and controlling the point switch to guide to the safety side, and controlling the first CPU and the second CPU to stop sending dynamic pulses to the power supply so as to cut off the external output of the solid-state relay and the safety relay group.

10. The control method according to claim 4, wherein after the controlling the safety relay group to indicate the position, outputting indication information of the switch machine, and controlling the electronic switch based on the indication information of the switch machine, the method further comprises:

and if the switch machine is judged to be turned to the position, detecting the position of the switch machine.

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