WO2017198139A1

WO2017198139A1 - Track circuit transmitter, and method of realizing fail-safe capability

Info

Publication number: WO2017198139A1
Application number: PCT/CN2017/084495
Authority: WO
Inventors: 任国桥; 孙国营; 徐宗奇; 王瑞
Original assignee: 北京全路通信信号研究设计院集团有限公司
Priority date: 2016-05-19
Filing date: 2017-05-16
Publication date: 2017-11-23
Also published as: CN105799735B; CN105799735A; EA037787B1; EA201892652A1

Abstract

A track circuit transmitter, and method of realizing fail-safe capability. The track circuit transmitter comprises: a controller (11) having a first output end connected to a control input end of a waveform generator (13), a second output end connected to a first input end of a safe AND gate circuit (12), and a third output end connected to a second input end of the safe AND gate circuit (12); the safe AND gate circuit (12) having an output end connected to a first power input end of the waveform generator (13) and to a control end of a controlled switch (16); the waveform generator (13) having an output end connected to an input end of a power amplifier (14); the power amplifier (14) having an output end connected to a first switch contact (1) of the controlled switch (16) and to an input end of a check-back circuit (15); the check-back circuit (15) having an output end connected to an input end of the controller (11); and the controlled switch (16) having a second switch contact (2) connected to a transmission system including the track circuit transmitter. In this way, the present invention eliminates restrictions of a controlled switch (16) of a track circuit transmitter to controlled switches (16) of a safe type.

Description

Track circuit transmitter and fault-oriented security implementation method

This application claims to be submitted to the Chinese Patent Office on May 19, 2016, the application number is 201610334257.X, and the title of the invention is the priority of the Chinese patent application for "track circuit transmitter and fault-oriented security implementation", the entire contents of which are The citations are incorporated herein by reference.

Technical field

The present application relates to the field of track circuits, and in particular to a track circuit transmitter and a method for implementing fault-oriented security.

Background technique

At present, the rails are divided into different sections by mechanical or electrical methods, and track circuits are arranged on each section to ensure railway safety. Wherein, the track circuit transmitter is a part of the track circuit, is disposed at one end of the segment for outputting a signal related to railway driving safety, and is provided with a track circuit receiver at the other end of the segment to detect the railway driving sent by the track circuit transmitter Safety-related signals to determine whether the rail section is idle or occupied, and to determine if there is a break.

Since the track circuit transmitter outputs the signal related to the railway driving safety and the device itself before the output of the signal related to the railway driving safety, the signal related to the railway driving safety is outputted when there is no fault. In the event of a fault, the output of the signal related to railway traffic safety needs to be cut off. Therefore, the structure of the track circuit transmitter is often a reactive fault-safe structure. As shown in Fig. 1, the track circuit transmitter includes: controller, safety and Gate circuit, waveform generator, power amplifier, controlled switch and return circuit. The waveform generator generates a specific waveform signal according to the waveform generation command sent by the controller, and outputs the signal to the power amplifier. The power amplifier amplifies the specific waveform signal generated by the waveform generator, outputs a power amplification signal, and collects the power amplification signal by the return detection circuit. And sending to the controller, the controller extracts the signal parameters and determines whether the signal parameters meet the requirements of the indicator and whether the transmitter device is operating normally, and if so, outputs two control signals to the safety and gate circuit, and if not, does not output the control signal To the safety and gate circuit, when the safety and gate circuit receives two control signals, the drive signal is output to the controlled switch, and the 1 contact and the 2 contact of the controlled switch are turned on, and the power amplification signal is output, and the safety and the gate circuit are When two control signals are not received, The 1 contact and the 2 contact of the control switch are disconnected, and the power amplification signal is not output, that is, in the presence of a fault, the output of the signal related to the railway driving safety is cut off, and the track circuit is not received by the track circuit receiver or the in-vehicle device. The wrong signal sent by the transmitter is related to the safety of the railway driving, to avoid the wrong identification of the track circuit receiver or the vehicle equipment, and to ensure the safety of the railway. It can be seen that the controlled switch is responsible for the safety cut-off function.

However, in order to enable the controlled switch to be safely cut off in the event of a fault in the track circuit transmitter, the probability of sticking of the controlled switch needs to be minimized, so a safe controlled switch such as a gravity type relay or an European standard safety type is generally used. Relays, however, are gravity-sized relays that increase the overall volume of the track circuit transmitter. Although the European standard safety relay is small in size, but the price is high, the cost of the track circuit transmitter is high. Also, the use of relays as controlled switches limits the application environment of the track circuit transmitter, such as in a strong vibration environment.

Summary of the invention

To solve the above technical problem, the embodiment of the present application provides a track circuit transmitter and a method for implementing fault-oriented security, so that the controlled switch of the track circuit transmitter is no longer limited to a safety-type controlled switch (such as a gravity type relay). The technical solution is as follows:

A track circuit transmitter comprising: a controller, a safety and gate circuit, a waveform generator, a power amplifier, a return circuit, and a controlled switch;

a first output of the controller is coupled to a control input of the waveform generator, a second output of the controller is coupled to a first input of the safety AND gate circuit, the controller a third output terminal is connected to the second input end of the safety AND gate circuit, and an output end of the safety AND gate circuit is respectively connected to a first power input end of the waveform generator and a control end of the controlled switch;

An output of the waveform generator is coupled to an input of the power amplifier, and an output of the power amplifier is coupled to a first switch contact of the controlled switch and an input of the return circuit, respectively An output of the return circuit is connected to an input of the controller;

a second switch contact of the controlled switch is connected to a transmission system to which the track circuit transmitter belongs;

The controller is configured to send a waveform generation command to the waveform generator, and receive a second waveform signal output by the power amplifier collected by the circuitback circuit and extract the second waveform signal a signal parameter of the number, determining whether the signal parameter meets an index requirement and whether the track circuit transmitter is operating normally, and if so, outputting a first control signal to the first input end of the safety AND gate circuit and outputting a second control signal To the second input end of the safety and gate circuit, if not, the operation of outputting the first control signal and the second control signal is not performed;

The safety AND gate circuit is configured to output a driving signal to the first power input end of the waveform generator and the control of the controlled switch when receiving the first control signal and the second control signal end;

The waveform generator is configured to generate a first waveform signal according to the waveform generation command, and output the first waveform signal to the power when the driving signal is received and the power supply is normally operated by the driving signal Amplifier

The power amplifier is configured to perform power amplification on the first waveform signal to obtain a second waveform signal, and output the second waveform signal;

The checkback circuit is configured to collect the second waveform signal, and output the collected second waveform signal to the controller;

The controlled switch is configured to: when the driving signal is received, the first switch contact and the second switch contact are turned on, and output the second waveform signal to a transmission system to which the track circuit transmitter belongs The first switch contact is disconnected from the second switch contact when the drive signal is not received.

Preferably, the waveform generator comprises: a first waveform generating circuit, a second waveform generating circuit, a first isolator and a second isolator;

An input end of the first waveform generating circuit serves as a control input end of the waveform generator;

An output end of the first waveform generating circuit is connected to an input end of the first isolator, an output end of the first isolator is connected to an input end of the second isolator, and the second isolator is The output end is connected to the input end of the second waveform generating circuit;

An input end of the second isolator serves as a first power input end of the waveform generator;

An output of the second waveform generating circuit serves as an output of the waveform generator.

Preferably, the first isolator is a first optocoupler, and the second isolator is a second optocoupler;

The waveform generator further includes: a first resistor, a second resistor, a third resistor, and a fourth resistor;

An output end of the first waveform generating circuit is connected to a first end of the first resistor, and a second end of the first resistor is connected to a first input end of the first optocoupler, the first light The second input end of the coupling is grounded, the first output end of the first optocoupler is connected to the second input end of the second optocoupler, and the second output end of the first optocoupler is connected to the safety gate The first sub-outputs of the circuit are connected;

a second input end of the second optocoupler is coupled to the first end of the second resistor, and a second end of the second resistor is coupled to the second sub-output of the safety AND gate circuit, a first input end of the second optocoupler is connected to the first end of the third resistor, and a second end of the third resistor is connected to the second sub-output end of the safety AND gate circuit, the second optocoupler The first output end is connected to the track circuit transmitter power supply, and the second output end of the second photocoupler is connected to the input end of the second waveform generating circuit and grounded through the fourth resistor;

Preferably, the first isolator is a first magnetic isolator, and the second isolator is a second magnetic isolator.

Preferably, the first isolator is a first capacitive isolator and the second isolator is a second capacitive isolator.

A method for implementing fault-oriented security of a track circuit transmitter includes:

The controller sends a waveform generation command to the waveform generator;

The controller receives a second waveform signal output by the power amplifier collected by the circuit, and the second waveform signal is a first waveform signal generated by the power amplifier according to the waveform generation command by the waveform generator a signal obtained by power amplification;

The controller extracts a signal parameter of the second waveform signal;

The controller determines whether the signal parameter meets an indicator requirement and whether the controller device is operating normally;

If yes, outputting a first control signal to the first input terminal of the safety AND gate circuit and outputting a second control signal to the second input end of the safety AND gate circuit, so that the safety AND gate circuit outputs a driving signal to The waveform generator and the controlled switch, the waveform generator outputs a first waveform signal when the power is normally supplied, and the controlled switch outputs the second waveform signal;

If not, the operation of outputting the first control signal and the second control signal is not performed such that the safety AND gate circuit does not output a drive signal.

Compared with the prior art, the beneficial effects of the present application are:

In the present application, the driving signal outputted by the safety and the gate circuit is used as a power supply waveform generator, and when the controller determines that the signal parameter meets the index requirement and the track circuit transmitter operates normally, the first control signal and the second control signal are output to The safety and gate circuit enables the safety and gate circuit to output a driving signal to the waveform generator and the controlled switch. The waveform generator supplies power normally to generate a first waveform signal, and the controlled switch is turned on under the control of the driving signal to output a second waveform signal. When the controller determines that the signal parameter does not meet the index requirement or the track circuit transmitter operates abnormally, the first control signal and the second control signal are not output to the safety AND gate circuit, so that the safety and gate circuit does not output the driving signal, and the waveform is generated. The device loses the working power and cannot continue to output the first waveform signal, and the controlled switch is disconnected because the drive signal is not received, so that the second waveform signal cannot be output, even if the controlled switch is stuck, the waveform generator loses the working power. Can not continue to output the first waveform signal, still can guarantee that the track circuit transmitter will not lose afterwards Wrong railway driving safety related waveform signals, so the probability of blocking the controlled switch can be minimized, so that non-safety controlled switches (ie non-gravity relays or non-European standard safety relays) can be used. The controlled switch of the track circuit transmitter is no longer limited to a safety type controlled switch (such as a gravity type relay), and the cost of the track circuit transmitter is reduced, and the requirements of the track circuit transmitter for the use environment vibration conditions are reduced.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present application. Other drawings may also be obtained from those of ordinary skill in the art in view of the drawings.

1 is a schematic diagram of a logical structure of a track circuit transmitter in the prior art;

2 is a schematic diagram of a logical structure of a track circuit transmitter provided by the present application;

3 is a schematic diagram of a logical structure of a waveform generator provided by the present application;

4 is a schematic diagram of another logical structure of a waveform generator provided by the present application;

FIG. 5 is a flow chart of a method for implementing fault-oriented security of a track circuit transmitter provided by the present application.

detailed description

The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the drawings in the embodiments of the present application. It is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

Embodiment 1

Referring to FIG. 2, a schematic diagram of a logical structure of a track circuit transmitter provided by the present application is shown. The track circuit transmitter includes: a controller 11, a safety AND gate circuit 12, a waveform generator 13, a power amplifier 14, and a back. The circuit 15 is controlled and the switch 16 is controlled.

a first output of the controller 11 is coupled to a control input of the waveform generator 13, and a second output of the controller 11 is coupled to a first input of the safety AND gate circuit 12, A third output of the controller 11 is coupled to a second input of the safety AND gate circuit 12, an output of the safety AND gate circuit 12 and a first power input of the waveform generator 13 and the The control terminals of the controlled switch 16 are connected.

An output end of the waveform generator 13 is connected to an input end of the power amplifier 14, and an output end of the power amplifier 14 is respectively connected to a first switch contact 1 of the controlled switch 16 and the return circuit 15 The input terminals are connected, and the output of the return circuit 15 is connected to the input of the controller 11.

The second switch contact 2 of the controlled switch 16 is connected to the transmission system to which the track circuit transmitter belongs.

The controller 11 is configured to send a waveform generation command to the waveform generator 13, and receive a second waveform signal output by the power amplifier collected by the circuit detection circuit 15 and extract a signal parameter of the second waveform signal. And determining whether the signal parameter meets the requirement of the indicator and whether the track circuit transmitter is operating normally; if yes, outputting the first control signal to the first input end of the safety AND gate circuit 12 and outputting the second control signal to the The second input of the safety AND gate circuit 12, if not, does not perform an operation of outputting the first control signal and the second control signal.

The second waveform signal outputted by the power amplifier 14 is a signal obtained by power-amplifying the first waveform signal generated by the waveform generator 13 in accordance with the waveform generation command transmitted by the controller 11.

The second output end of the controller 11 outputs a first control signal, and the third output end of the controller outputs a second control signal.

In the present embodiment, the signal collected by the check circuit 15 is the second waveform signal output from the power amplifier 14.

The controller 11 extracts and determines whether the signal parameters (such as frequency and amplitude) meet the requirements of the indicator.

In this embodiment, the specific process of the controller 11 determining whether the track circuit transmitter is operating normally may be, but is not limited to, determining whether the read/write of the RAM (random access memory) in the controller 11 is normal, or determining Whether the power supply voltage of the track circuit transmitter is normal.

The safety AND gate circuit 12 is configured to output a driving signal to the first power input end of the waveform generator 13 and the controlled switch when receiving the first control signal and the second control signal The control end of 16.

The waveform generator 13 is configured to generate a first waveform signal according to the waveform generation command when the driving signal is received and the power is normally operated by the driving signal, and output the first waveform signal to the Power amplifier 14.

The power amplifier 14 is configured to perform power amplification on the first waveform signal to obtain a second waveform signal, and output the second waveform signal.

The check circuit 15 is configured to collect the second waveform signal and output the collected second waveform signal to the controller 11.

The controlled switch 16 is configured to, when receiving the driving signal, the first switch contact and the second switch contact are turned on, and output the second waveform signal to a transmission of the track circuit transmitter The system, when the driving signal is not received, the first switch contact is disconnected from the second switch contact.

In the track circuit transmitter shown in Fig. 2, the drive signal output from the safety AND gate circuit 12 is used as the power supply signal supply waveform generator 13 to supply power to the entire waveform generator 13. When the safety and gate circuit 12 does not output the drive signal, the waveform generator 13 cannot operate due to the absence of the power source, and the first waveform signal cannot be generated based on the waveform generation command of the controller 11. Even if the power amplifier 14 is still operating and the controlled switch 16 is turned on at this time, the noise signal in the track circuit transmitter can be amplified and output to the rail, but the output noise signal does not have a specific modulation characteristic (such as CP- FSK modulation), the noise signal is not recognized as useful information by the track circuit receiver and the in-vehicle device. Therefore, the purpose of guiding the track circuit transmitter to the safe side is achieved. It can be seen that even if the controlled switch 16 is stuck, the track circuit transmitter determines that the second waveform signal does not meet the index requirement or the track circuit transmitter device operates abnormally. At the same time, it can still ensure that the wrong waveform signal related to driving safety is no longer output, and the track circuit receiver and the vehicle equipment are continuously received and the error information is ensured to ensure the safety of the railway.

In the present application, a non-contact type electronic switch can be used instead of the controlled switch 16.

In the present application, the driving signal output from the safety and gate circuit 12 is used as the power supply waveform generator 13, and when the controller 11 determines that the signal parameter meets the index requirement and the track circuit transmitter operates normally, the first control signal and the second are output. The control signal is sent to the safety AND gate circuit 12, causing the safety AND gate circuit 12 to output a drive signal to the waveform generator 13 and the controlled switch 16, the waveform generator 13 is normally powered, generating a first waveform signal, and the controlled switch 16 is controlled at the drive signal The first waveform signal is outputted, and when the controller 11 determines that the signal parameter does not meet the index requirement or the track circuit transmitter operates abnormally, the first control signal and the second control signal are not output to the safety AND gate circuit 12, so that The safety and gate circuit 12 does not output the driving signal, the waveform generator 13 loses the operating power supply, and the first waveform signal cannot be continuously output, and the controlled switch 16 is disconnected because the driving signal is not received, so that the second waveform signal cannot be output, even if The controlled switch 16 is stuck, but the waveform generator 13 loses the operating power and cannot continue to output the first waveform signal, and the track can still be guaranteed. The circuit transmitter then no longer outputs erroneous driving safety related waveform signals, so the probability of blocking the controlled switch 16 can be minimized, so that non-safety controlled switches (ie non-gravity type relays or Non-European standard safety relays, so that the controlled switch of the track circuit transmitter is no longer limited to safety-type controlled switches (such as gravity type relays), and the cost of the track circuit transmitter is reduced, and the track circuit transmitter is reduced. Requirements for the use of environmental vibration conditions.

Referring to FIG. 3, a schematic diagram of a logical structure of the waveform generator 13 is shown. The waveform generator 13 includes a first waveform generating circuit 131, a second waveform generating circuit 132, a first isolator 133, and a second isolator. 134.

An input terminal of the first waveform generating circuit 131 serves as a control input terminal of the waveform generator 13.

An output end of the first waveform generating circuit 131 is connected to an input end of the first isolator 133, and an output end of the first isolator 133 is connected to an input end of the second isolator 134. An output of the second isolator 134 is coupled to an input of the second waveform generating circuit 132.

An input end of the second isolator 134 serves as a first power input terminal of the waveform generator 13.

An output of the second waveform generating circuit 132 serves as an output of the waveform generator 13.

The power supply mode of the waveform generator 13 shown in FIG. 3 is compared to the track circuit transmitter shown in FIG. 2. The power supply mode of the waveform generator 13 is that the safety and gate circuit 12 no longer supplies power to the entire waveform generator 13, but supplies power to the first isolator 133 and the second isolator 134 through the first isolator 133 and the second. The turning on and off between the isolators 134 realizes the on and off of the first waveform generating circuit 131 and the second waveform generating circuit 132, thereby controlling whether the waveform generator 13 outputs the first waveform signal.

In this embodiment, the first isolator 133 may be a first optocoupler P1, and the second isolator 134 may be a second optocoupler P2.

When the first isolator 133 is the first optocoupler P1 and the second isolator 134 is the second optocoupler P2, the waveform generator further includes: a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor. R4, as shown in Figure 4.

An input end of the first waveform generating circuit 131 serves as a control input of the waveform generator 13.

An output end of the first waveform generating circuit 131 is connected to the first end of the first resistor R1, and a second end of the first resistor R1 is connected to the first input end of the first optocoupler P1. The second input end of the first optocoupler P1 is grounded, the first output end of the first optocoupler P1 is connected to the second input end of the second optocoupler P2, and the second optocoupler P1 is connected to the second The output is coupled to the first sub-output of the safety AND gate circuit 12.

The second input end of the second optocoupler P2 is connected to the first end of the second resistor R2, and the second end of the second resistor R2 is connected to the second sub-output end of the safety AND gate circuit 12 The first input end of the second optocoupler P2 is connected to the first end of the third resistor R3, the second end of the third resistor R3 and the second sub-output of the safety AND gate circuit 12 Connected, the first output end of the second optocoupler P2 is connected to the track circuit transmitter power supply Vcc, and the second output end of the second optocoupler P2 is connected to the input end of the second waveform generation circuit 132 and Grounded through the fourth resistor R4.

The first sub-output of the safety and gate circuit 12 and the second sub-output of the safety and gate circuit 12 form an output of the safety and gate circuit 12, and the first sub-output of the safety and gate circuit 12 outputs a positive driving signal. The second sub-output of the signal, safety and gate circuit 12 outputs a drive signal negative signal.

The waveform generator 13 shown in Fig. 4 works as follows:

The secondary side of the first optocoupler P1 and the primary side of the second optocoupler P2 are powered by the safety and gate circuit 12, and when the safety and gate circuit 12 does not output a drive signal, the secondary side and the second of the first optocoupler P1 One of the optocouplers P2 When the secondary side power supply disappears, the input signal of the first optical coupler P1 cannot be transmitted to the second optical coupler P2, and the signal of the first waveform generating circuit 131 cannot be transmitted to the second waveform generating circuit 132, and the first waveform signal cannot be generated, thereby achieving security. Cut off the purpose of the error signal output.

Among them, only when two optocouplers fail at the same time, the electric connection between the first leg of the first optocoupler P1 and the third leg of the second optocoupler P2 can be realized without the need of "electric-optical-electrical" conversion. There is a possibility that the error signal output cannot be safely cut off. Since the two optocouplers fail at the same time and the probability of electrical connection between the 1 pin of the first optocoupler P1 and the pin 3 of the second optocoupler P2 is extremely low, when the two optocouplers fail at the same time, the error signal output cannot be cut off on schedule. The probability is low.

In this embodiment, the first isolator 133 may be specifically, but not limited to, a first magnetic isolator. Correspondingly, the second isolator 134 may specifically, but not limited to, be a second magnetic isolator.

In this embodiment, the first spacer 133 may be specifically, but not limited to, a first capacitive isolators. Correspondingly, the second isolators 134 may specifically, but not limited to, be second capacitive isolators.

Embodiment 2

Corresponding to the above-mentioned track circuit transmitter, this embodiment provides a method for implementing fault-oriented security of a track circuit transmitter. Referring to FIG. 5, the following steps may be included:

Step S51: The controller sends a waveform generation command to the waveform generator.

Step S52: The controller receives the second waveform signal output by the power amplifier collected by the circuit.

The second waveform signal is a signal obtained by the power amplifier for power-amplifying the first waveform signal generated by the waveform generator according to the waveform generation command.

Step S53: The controller extracts a signal parameter of the second waveform signal.

Step S54: The controller determines whether the signal parameter meets the requirement of the indicator and whether the transmitter device is operating normally.

If yes, go to step S55, if no, go to step S56.

Step S55: output a first control signal to the first input end of the safety AND gate circuit and output a second control signal to the second input end of the safety AND gate circuit, so that the safety AND gate circuit outputs a driving signal To the waveform generator and the controlled switch to cause the waveform generator to be powered normally The first waveform signal is output, and the controlled switch outputs the second waveform signal.

Step S56: The operation of outputting the first control signal and the second control signal is not performed, so that the safety AND gate circuit does not output a driving signal.

It should be noted that each embodiment in the specification is described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same similar parts between the embodiments are referred to each other. can. For the device type embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment.

Finally, it should also be noted that in this context, relational terms such as first and second are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these entities. There is any such actual relationship or order between operations. Furthermore, the term "comprises" or "comprises" or "comprises" or any other variations thereof is intended to encompass a non-exclusive inclusion, such that a process, method, article, or device that comprises a plurality of elements includes not only those elements but also Other elements, or elements that are inherent to such a process, method, item, or device. An element that is defined by the phrase "comprising a ..." does not exclude the presence of additional equivalent elements in the process, method, item, or device that comprises the element.

The method for implementing the track circuit transmitter and the fault-oriented security provided by the present application is described in detail above. The principle and implementation manner of the present application are described in the specific examples. The description of the above embodiment is only used for To help understand the method of the present application and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. It should not be construed as limiting the application.

Claims

A track circuit transmitter, comprising: a controller, a safety and gate circuit, a waveform generator, a power amplifier, a return circuit, and a controlled switch;

a first output of the controller is coupled to a control input of the waveform generator, a second output of the controller is coupled to a first input of the safety AND gate circuit, the controller a third output terminal is connected to the second input end of the safety AND gate circuit, and an output end of the safety AND gate circuit is respectively connected to a first power input end of the waveform generator and a control end of the controlled switch;

An output of the waveform generator is coupled to an input of the power amplifier, and an output of the power amplifier is coupled to a first switch contact of the controlled switch and an input of the return circuit, respectively An output of the return circuit is connected to an input of the controller;

a second switch contact of the controlled switch is connected to a transmission system to which the track circuit transmitter belongs;

The controller is configured to send a waveform generation command to the waveform generator, and receive a second waveform signal output by the power amplifier collected by the circuitback circuit and extract a signal parameter of the second waveform signal, and determine Whether the signal parameter meets the requirement of the indicator and whether the track circuit transmitter is operating normally; if yes, outputting the first control signal to the first input end of the safety AND gate circuit and outputting the second control signal to the safety AND gate a second input of the circuit, if not, an operation of outputting the first control signal and the second control signal;

The safety AND gate circuit is configured to output a driving signal to the first power input end of the waveform generator and the control of the controlled switch when receiving the first control signal and the second control signal end;

The waveform generator is configured to generate a first waveform signal according to the waveform generation command, and output the first waveform signal to the power when the driving signal is received and the power supply is normally operated by the driving signal Amplifier

The power amplifier is configured to perform power amplification on the first waveform signal to obtain a second waveform signal, and output the second waveform signal;

The checkback circuit is configured to collect the second waveform signal, and output the collected second waveform signal to the controller;

The controlled switch is configured to: when the driving signal is received, the first switch contact and the second switch contact are turned on, and output the second waveform signal to a transmission system to which the track circuit transmitter belongs The first switch contact is disconnected from the second switch contact when the drive signal is not received.
The track circuit transmitter according to claim 1, wherein the waveform generator comprises: a first waveform generating circuit, a second waveform generating circuit, a first isolator and a second isolator;

An input end of the first waveform generating circuit serves as a control input end of the waveform generator;

An output end of the first waveform generating circuit is connected to an input end of the first isolator, an output end of the first isolator is connected to an input end of the second isolator, and the second isolator is The output end is connected to the input end of the second waveform generating circuit;

An input end of the second isolator serves as a first power input end of the waveform generator;

An output of the second waveform generating circuit serves as an output of the waveform generator.
The track circuit transmitter according to claim 2, wherein the first isolator is a first optocoupler, and the second isolator is a second optocoupler;

The waveform generator further includes: a first resistor, a second resistor, a third resistor, and a fourth resistor;

An input end of the first waveform generating circuit serves as a control input end of the waveform generator;

An output end of the first waveform generating circuit is connected to a first end of the first resistor, and a second end of the first resistor is connected to a first input end of the first optocoupler, the first light The second input end of the coupling is grounded, the first output end of the first optocoupler is connected to the second input end of the second optocoupler, and the second output end of the first optocoupler is connected to the safety gate The first sub-outputs of the circuit are connected;

a second input end of the second optocoupler is coupled to the first end of the second resistor, and a second end of the second resistor is coupled to the second sub-output of the safety AND gate circuit, a first input end of the second optocoupler is connected to the first end of the third resistor, and a second end of the third resistor is connected to the second sub-output end of the safety AND gate circuit, the second optocoupler The first output end is connected to the track circuit transmitter power supply, and the second output end of the second photocoupler is connected to the input end of the second waveform generating circuit and grounded through the fourth resistor;

An output of the second waveform generating circuit serves as an output of the waveform generator.
A track circuit transmitter according to claim 3, wherein said first isolation The device is a first magnetic isolator and the second isolator is a second magnetic isolator.
The track circuit transmitter of claim 3, wherein the first isolator is a first capacitive isolator and the second isolator is a second capacitive isolator.
A method for implementing fault-oriented security of a track circuit transmitter, characterized in that it comprises:

The controller sends a waveform generation command to the waveform generator;

The controller receives a second waveform signal output by the power amplifier collected by the circuit, and the second waveform signal is a first waveform signal generated by the power amplifier according to the waveform generation command by the waveform generator a signal obtained by power amplification;

The controller extracts a signal parameter of the second waveform signal;

The controller determines whether the signal parameter meets an indicator requirement and whether the controller device is operating normally;

If yes, outputting a first control signal to the first input terminal of the safety AND gate circuit and outputting a second control signal to the second input end of the safety AND gate circuit, so that the safety AND gate circuit outputs a driving signal to The waveform generator and the controlled switch, the waveform generator outputs a first waveform signal when the power is normally supplied, and the controlled switch outputs the second waveform signal;

If not, the operation of outputting the first control signal and the second control signal is not performed such that the safety AND gate circuit does not output a drive signal.