CN116767305A

CN116767305A - Full-electronic coding and signal transmission device and method

Info

Publication number: CN116767305A
Application number: CN202311047486.XA
Authority: CN
Inventors: 孙国营; 刘锐冬; 张忠红; 任国桥; 张夫松
Original assignee: CRSC Research and Design Institute Group Co Ltd
Current assignee: CRSC Research and Design Institute Group Co Ltd
Priority date: 2023-08-21
Filing date: 2023-08-21
Publication date: 2023-09-19
Anticipated expiration: 2043-08-21
Also published as: CN116767305B

Abstract

The application belongs to the technical field of all-electronic computer interlocking, and discloses an all-electronic coding and signal transmission device and method, wherein the device comprises: adopting two-out-of-two coded modules I and II, and determining the type of the output coding condition according to configuration information issued by computer interlocking; the electric coding module I system and the electric coding module II system both comprise a processor control circuit, a control circuit and a control circuit, wherein the processor control circuit is used for controlling the relay excitation circuit and the coding condition output circuit to output coding conditions; and the processor control circuit is also used for monitoring the working states of the relay excitation circuit and the coding condition output circuit in real time through the dynamic safety acquisition circuit. The application cancels the gravity relay of the external coding circuit and the signal transmission circuit, monitors the working state of the circuit in real time, and alarms information when in faults are convenient to maintain, and can quickly cut off the coding channel after the faults, stop outputting and lead the equipment to be guided by the faults safely.

Description

Full-electronic coding and signal transmission device and method

Technical Field

The application belongs to the technical field of all-electronic computer interlocking, and particularly relates to an all-electronic coding and signal transmission device and method.

Background

The technology of forwarding or superposing locomotive signal information by a track circuit is called encoding, and the station encoding system which is widely used by part of railways at present is superposition encoding, as shown in fig. 1, the superposition encoding is implemented by connecting the track circuit and encoding equipment in parallel through an electrical isolation device, so that the track information is sent and received, the encoded information is sent, and meanwhile, the rail is connected, and the encoding time is reduced to the minimum.

The superposition code is divided into occupation superposition code and pre-superposition code, and according to the specification of the railway station code technical conditions, the station positive line of the non-alternating current counting code system adopts pre-superposition code, and the stock way to the transmission line adopts occupation superposition code.

The pre-superposition coding and superposition coding are to logically judge the route information, the section, the blocking partition idle information and the like according to the conditions provided by signal interlocking, control an FS (coding transmitting device) in the upper diagram to output a given coding signal, control a CJ (coding transmission relay) in the upper diagram to conduct and transmit the coding signal to a set section at a proper time, and GL in the diagram is a coding isolator.

The computer interlocking is based on relay interlocking, the interlocking relation is ensured by computer software, and the circuit is executed by a relay.

The full-electronic computer interlocking is based on computer interlocking, and the relay executing circuit is replaced by an electronic executing module.

In the coded execution circuit realized by adopting the relay contact circuit, the coded function is realized by the following 3 parts of circuits: a control circuit for controlling the code sending conditions, and relates to an excitation circuit such as JMJ (pick-up code relay), FMJ (departure code relay), CJ and the like; the channel switching circuit controls the time of code sending and is built by the junction of CJ or GJF (rail power supply), JMJ or FMJ (code sending relay); the code transmitting circuit consists of a transmitter, a coding circuit and the like.

In the prior art, a large number of gravity relay building condition circuits are adopted in a channel switching circuit, an exciting circuit and a coding circuit of JMJ and GCJ, and the output of the relay executing circuits is controlled by computer interlocking.

The prior art has the following problems:

in the station coding system, the existing majority of modes adopt a gravity relay to build a coding circuit for providing coding conditions for a coding transmitter, the quantity of relays used by the coding circuit is large, wiring is complex, fault points are many, real-time monitoring cannot be carried out, the coding signal transmission circuit is also built by adopting the gravity relay, wiring is complex, real-time monitoring cannot be carried out, and once a coding signal channel fails, the checking process is complex, a large amount of labor is consumed, and the maintenance difficulty is greatly increased.

Disclosure of Invention

Aiming at the problems, the application provides a full-electronic coding and signal transmission device and a method, which adopt the following technical scheme:

the full-electronic coding and signal transmission device comprises an encoding module I system and an encoding module II system which adopt a two-in-two structure, wherein the encoding module I system and the encoding module II system both comprise a processor control circuit, a relay excitation circuit, a coding condition output circuit and a dynamic safety acquisition circuit;

the coding module I and the coding module II determine the type of the output coding condition according to the configuration information issued by the computer interlocking;

the processor control circuit is used for controlling the relay exciting circuit and the coding condition output circuit to output coding conditions;

and the processor control circuit is also used for monitoring the working states of the relay excitation circuit and the coding condition output circuit in real time through the dynamic safety acquisition circuit.

Further, the electronic coding and signal transmission device also comprises a coding condition terminal board and an encoding frequency shift signal terminal board;

wherein, the encoding module I is connected with the encoding condition terminal board and the encoding frequency shift signal terminal board, and the encoding module II is connected with the encoding condition terminal board and the encoding frequency shift signal terminal board; the coding condition terminal board is connected with the coding transmitter, the coding transmitter is connected with the coding adjustment device, the coding adjustment device is connected with the coding frequency shift signal terminal board, and the coding frequency shift signal terminal board is also connected with the coding isolation device.

Further, the coded module I system and the coded module II system also comprise a first safety power supply, a second safety power supply, a third safety power supply and a fourth safety power supply; the relay excitation circuit comprises a coding relay excitation circuit and an encoding transmission relay excitation circuit;

the first safety power supply is used for providing power for the coding relay excitation circuit, the second safety power supply and the third safety power supply are respectively used for driving power supplies of the 2 coding condition source main switch relays, the fourth safety power supply is used for switching the driving power supplies of the relays, and the switching relays are arranged on the coded frequency shift signal terminal board.

Further, the processor control circuit comprises a first CPU and a second CPU, the first CPU is connected with the second CPU, the first CPU is used for controlling the coding relay excitation circuit and the coded transmission relay excitation circuit, each safety power supply converts dynamic pulse width control signals from the first CPU and the second CPU into direct current power supplies capable of driving the relay, and when any CPU dynamic pulse width control signal does not exist, the output of the direct current power supplies is stopped.

Further, the first CPU and the second CPU are also used for self-checking the dynamic pulse width control signal input into each safety power supply.

Further, the encoding condition output circuit comprises a first-stage switch and a second-stage switch which are connected with each other;

the first-stage switch comprises normally open nodes of 2 coding condition main switch relays, the normally open contacts of the 2 coding condition main switch relays are connected in parallel, the normally open contacts of 1 coding condition main switch relay are kept closed, and the normally open contacts of the other 1 coding condition main switch relay are opened;

the second stage switch comprises a normally open contact of the encoding relay.

Further, the first CPU and the second CPU are also used for simultaneously collecting normally open and normally closed contacts of the coded transmission relay, the coding relay, the switching relay and the coding condition main switch relay through the dynamic safety collecting circuit, judging the consistency of driving and collecting and the mutual exclusivity of the contacts, alarming after failure and guiding to the safety side.

Further, 2 switching relays are arranged, the first switching relay and the second switching relay share 1 fourth safety power supply, the first switching relay and the second switching relay are fixedly controlled by the coding module I, when the coding module I is in a control mode as a main system, the first switching relay and the second switching relay are driven to be sucked up, and otherwise, the first switching relay and the second switching relay are in a falling state.

Further, in the positive line path coding type, the first switching relay and the second switching relay each include 3 groups of normally open contacts and 3 groups of normally closed contacts;

the system comprises a first switching relay, a second switching relay, a first encoding module I and a second encoding module II, wherein the first switching relay is connected with the second switching relay through a plurality of groups of normally open contacts and normally closed contacts, the second switching relay is connected with the first encoding module I, the second switching relay is connected with the second encoding module II through a plurality of groups of normally open contacts and normally closed contacts, the first switching relay is connected with the second encoding module I, and the second switching relay is connected with the second encoding module II through a plurality of groups of normally open contacts and normally closed contacts.

Further, the dynamic safety acquisition circuit comprises a first acquisition circuit and a second acquisition circuit which are identical in structure, the first CPU carries out dynamic code transmitting acquisition on the normally open contact and the normally closed contact of the relay through the first acquisition circuit, the second CPU carries out dynamic code transmitting acquisition on the normally open contact and the normally closed contact of the relay through the second acquisition circuit, and the first acquisition circuit and the second acquisition circuit all comprise a normally open contact acquisition branch, a normally closed contact acquisition branch and a control branch.

Further, when the dynamic safety acquisition circuit carries out the recheck on the relays, the normally open contact acquisition branch and the normally closed contact acquisition branch share one control branch.

Further, the first CPU and the second CPU acquire the contact state of the relay through a dynamic safety acquisition circuit in a mode of multiplexing the IO ports in a time-sharing way, and different dynamic control signals are adopted by adjacent channels.

Further, the first CPU and the second CPU are further configured to determine a relay contact state according to a result acquired in a set time after sending a dynamic control signal to the dynamic security acquisition circuit.

Further, the configuration information includes the coded transmitter type information and the coded mode information.

The application also provides an all-electronic coding and signal transmission method, which comprises the following steps:

determining the type of the output coding condition according to the type information of the coding transmitter and the coding mode information;

the control relay excitation circuit and the coding condition output circuit output coding conditions;

and monitoring the working states of the relay exciting circuit and the coding condition output circuit in real time.

Further, the real-time monitoring of the working states of the relay excitation circuit and the coding condition output circuit comprises the following steps:

and meanwhile, normally open and normally closed contacts of the coded transmission relay, the coded relay, the switching relay and the coded condition main switch relay are collected, the consistency of driving and mining and the mutual exclusivity of the contacts are judged, and the alarm is given after the fault occurs and the safety side is led.

The application has the beneficial effects that:

1. the application puts the processor control circuit, the relay excitation circuit, the coding condition output circuit and the dynamic safety acquisition circuit into the device, cancels the gravity relay of the external coding circuit and the signal transmission circuit, and simultaneously keeps the interface mode with the coded transmitter unchanged so as to adapt to the coded transmitter of the existing station.

2. The application monitors the working states of the relay exciting circuit and the coding condition output circuit in real time through the dynamic safety acquisition circuit, gives alarm information in time when in fault, and is convenient for maintenance. After the fault is found, the coding channel can be cut off rapidly, so that the transmitter stops outputting, and the safety of the equipment guided by the fault is ensured.

3. The application is suitable for the configuration modes of various scenes, is suitable for relay code transmitters and communication code transmitters, and is capable of realizing forward line route coding and side track coding, controlling a plurality of sections at most by one module, ensuring safety, simultaneously providing codes for a plurality of transmitters, providing codes for redundant +1 transmitters and providing multi-path coding conditions.

4. The arrangement of the switching circuit in the forward path coding type ensures that after a single system module fails, the other system of operation is not influenced, dangerous output is not generated, and the system can be guided to a safety side.

5. The application is provided with the multiple switch protection circuit, and the safety of the module is enhanced by arranging the multiple safety switches.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 shows a schematic diagram of the structure of a superimposed code according to the prior art;

FIG. 2 shows a schematic structural diagram of an all-electronic encoding and signaling device according to an embodiment of the present application;

FIG. 3 shows a schematic diagram of the architecture of the encoder modules of the system I and the system II, according to an embodiment of the present application;

FIG. 4 shows a schematic diagram of an encoding signal switching circuit in a positive line approach encoding type according to an embodiment of the present application;

fig. 5 shows a schematic diagram of the structure of an encoding condition output circuit according to an embodiment of the present application;

FIG. 6 shows a schematic diagram of a dynamic security acquisition circuit in accordance with an embodiment of the present application;

FIG. 7 shows a schematic diagram of a software architecture design according to an embodiment of the application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that the terms "first," "second," and the like herein are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

The embodiment of the application provides an all-electronic coding and signal transmission device, which is characterized in that a coding circuit and a signal transmission circuit are placed in the device, a gravity relay of the external coding circuit and the signal transmission circuit is canceled, and meanwhile, the interface mode with an encoding transmitter is kept unchanged, so that the device is suitable for the encoding transmitter of the existing station, the physical output of the coding condition and the signal transmission circuit is controlled in an all-electronic mode, the working states of the coding circuit and the signal transmission circuit are monitored in real time, alarm information is timely given when the device fails, and the device is convenient to maintain. The coding circuit and the signal transmission circuit adopt fault real-time detection, and can rapidly cut off a coding channel after the fault is found, so that the coded transmitter stops outputting, and the safety of equipment guided by the fault is ensured.

As shown in fig. 2, the full-electronic coding and signal transmission device comprises a coding module I system, a coding module II system, a coding condition terminal board and a coding frequency shift signal terminal board which are arranged in a cage.

Wherein the encoding module I is connected with the interlocking I system and the interlocking II system of the computer interlocking system through the configuration board I, the coded module II is connected with the interlocking I system and the interlocking II system of the computer interlocking system through the configuration board II, and the coded module I and the coded module II are connected through an intersystem redundancy A network and an intersystem redundancy B network.

The encoding module I is connected with the encoding condition terminal board and the encoding frequency shift signal terminal board, and the encoding module II is connected with the encoding condition terminal board and the encoding frequency shift signal terminal board; the coding condition terminal board is connected with the coding transmitter, the coding transmitter is connected with the coding adjustment device, the coding adjustment device is connected with the coding frequency shift signal terminal board, and the coding frequency shift signal terminal board is also connected with the coding isolation device.

For example, the encoding module I system, the encoding module II system, the encoding condition terminal board and the encoding frequency shift signal terminal board are connected by motherboard PCB wiring.

Wherein, the code module I and the code module II are identical modules, and adopt a main and standby redundancy working mode. The encoding module I and the encoding module II determine the active/standby state through the data interaction between the systems, and when the two systems are simultaneously started, the fixed I is the primary system, and besides, the first starting is the primary system.

The encoding condition terminal board sends encoding conditions to the encoding transmitter, the encoding transmitter sends encoding condition sources to the encoding modules I and II through the encoding condition terminal board, the encoding transmitter generates encoding frequency shift signals according to the encoding conditions, the encoding frequency shift signals are processed through the encoding adjustment equipment and then sent to the encoding isolation equipment through the encoding frequency shift signal terminal board, the encoding frequency shift signals are processed through the encoding isolation equipment and then sent outwards, and the encoding isolation equipment is used for playing a high barrier effect on a track circuit so as to avoid interference on the encoding frequency shift signals.

In order to adapt to different types of coded transmitters and coded modes, the all-electronic coding and signal transmission device of the embodiment of the application is divided into 5 types, as shown in table 1, and table 1 is a comparison table of coding condition types.

TABLE 1

The coding module I and the coding module II determine the type of the output coding condition according to the configuration information issued by the computer interlocking, wherein the configuration information comprises coding transmitter type information and coding mode information; based on the safety control protocol network, the safety control protocol network is issued to the coding module I system and the coding module II system by the computer interlock, and is used for judging the type of the full-electronic coding and signal transmission device and executing corresponding functions.

As shown in FIG. 3, the two-out structure is adopted by the encoding module I and the encoding module II, and the encoding module I and the encoding module II respectively comprise a processor control circuit, a plurality of safety power supplies, a relay excitation circuit, an encoding condition output circuit and a dynamic safety acquisition circuit, wherein the processor control circuit comprises a first CPU and a second CPU, and the first CPU is connected with the second CPU.

The processor control circuit is used for controlling the relay exciting circuit and the coding condition output circuit and outputting the coding condition; and the processor control circuit is also used for monitoring the working states of the relay excitation circuit and the coding condition output circuit in real time through the dynamic safety acquisition circuit.

The relay exciting circuit comprises a coding relay exciting circuit and an encoding transmission relay exciting circuit.

Each coding module can complete the interaction of state data between two CPUs through internal redundant communication, and the function of two-out-of-two is realized. For example, the first CPU and the second CPU each include an MCU chip and a crystal, the MCU chip being a core of control.

The multiple safety power supplies comprise a first safety power supply, a second safety power supply, a third safety power supply and a fourth safety power supply, each safety power supply converts dynamic pulse width control signals from the first CPU and the second CPU into direct current power supplies capable of driving the relay, when any CPU dynamic pulse width control signal does not exist, the output of the direct current power supplies is stopped, 2-out-of-2 operation is achieved, and 4 safety power supplies respectively correspond to 4 pairs of input signals.

The first CPU and the second CPU are also used for self-checking the dynamic pulse width control signals input into each safety power supply, and timely finding out fault alarms of the safety power supply circuits.

For example, the first safety power supply is used for providing power for the excitation circuit of the coding relay, the second safety power supply and the third safety power supply are respectively used for driving power supplies of the main switch relay of the 2 coding condition sources, the fourth safety power supply is used for driving power supplies of the switching relay (QHJ) in the positive line subtype, the QHJ relay is arranged on the coded frequency shift signal terminal board, the switching relay (QHJ) adopts a small forced guiding relay and is used for switching signal input channels, and the independent operation of the coded module I system and the coded module II system is ensured.

The relay excitation circuit is connected with a first CPU, and the first CPU is used for controlling the relay excitation circuit.

The CJ (coded transmission relay) and the coding relay for conducting coding conditions are small forced guiding contact relays, and the relays theoretically have adhesion faults caused by contact burning, so that the power supply condition for controlling the suction of the relays can not adopt safety and driving, and common isolation control circuits are adopted for saving cost. The first CPU controls the excitation driving circuits of all CJ and encoding relays by adopting reactive fail-safe mode control.

For example, in the forward path encoding type (including relay encoding and communication encoding type), the following technical requirements should be satisfied when the forward path encoding type is applied to the forward path pre-superposition coding section: when the train imports the signal, at least the first section inside the train transmits the forbidden code or does not transmit the code. If the electric code module I and the electric code module II are applied in double systems, the relay is adhered due to the faults such as contact melting and the like in the main system, the fault module is reduced to the standby system, the other system is lifted to be output normally, and if the contact adhesion CJ of the fault system is a first section transfer switch in the inner side of the access, the first section in the inner side of the access is caused to send out an effective code, which is contrary to the technical requirements.

Aiming at the technical requirements, as shown in fig. 4, when the subtype of the full-electronic coding and signal transmission device is a positive line type, 2 switching relays (QHJ) are arranged, and a first switching relay and a second switching relay are arranged on a coded frequency shift signal terminal board, so that two-system switching of input signals is realized, and the first switching relay and the second switching relay share 1 fourth safety power supply.

The first switching relay and the second switching relay are fixedly controlled by the encoding module I, when the encoding module I is mainly in a control mode, the first switching relay and the second switching relay are driven to be sucked up, and otherwise, the first switching relay and the second switching relay are in a falling state.

In the positive line path encoding type, 2 signals are input at most, and 2 signal lines are input for each signal. The first switching relay and the second switching relay comprise 3 groups of normally open contacts and 3 groups of normally closed contacts, wherein 2 groups of normally open contacts (NO) and normally closed contacts (NC) of the first switching relay are used for switching the outgoing lines of 2 paths of input signals, 2 groups of normally open contacts (NO) and normally closed contacts (NC) of the second switching relay are used for switching the return lines of 2 paths of input signals, 1 group of normally open contacts (NO) and normally closed contacts (NC) of the first switching relay and the second switching relay are connected with a coding module I system and a coding module II system, and the coding module I system and the coding module II system are used for checking the contact states of the first switching relay and the second switching relay through 1 group of normally open contacts (NO) and normally closed contacts (NC).

The first switching relay and the second switching relay are respectively combined by adopting a 3NO relay and a 3NC relay, and 1 group of NO contacts and NC contacts of the first switching relay and the second switching relay are connected in series to carry out contact state recheck, and 1 fault is the integral fault and is used as 1 relay.

When the encoding module I or II is the main system, the first switching relay and the second switching relay switch the input signal into the main system.

If there is a CJ in the main system, the relay is stuck due to the faults such as contact burning, and the input signal is also tangentially raised to the main system when the other system is raised to the main system, and the fault system will not have signal output.

If the input signal is interfered, a large current impact signal is gushed in, and meanwhile, the contact point closed by the first switching relay and the second switching relay and the normally open contact point of the CJ are simultaneously welded to cause adhesion, possibly dangerous consequences are caused, at the moment, the main system in the I system or the II system of the electric code transmitter can timely identify the CJ to suck adhesion faults, the main system stops outputting (restarting to the safety side), the control command becomes a safety side falling command, the safety AND gate does not output, all codes stop outputting, the main system is lifted, the first switching relay and the second switching relay are identified to be blocked after the main system is lifted, the module is stopped after the other system is stuck, the safety side is guided, the safety AND gate does not output, the code outputting is stopped, and the double systems are ensured not to output the electric code signal because of the inherent characteristics of stopping outputting after the code condition is not provided by the electric code transmitter, and the fault guiding safety is ensured.

For example, if the subtype of the all-electronic coding and signal transmission device in the embodiment of the application is a communication coding type, if the relay has adhesion fault, the logic part state of the interlocking of the coding module I system or the II system and the computer is in a communication interruption state, and when the communication of the coding module I system or the II system and the logic part is interrupted, the logic part performs safety side protection on the coding of the coding transmitter, namely does not output coding conditions or output safety side coding conditions, so that the coding module I system or the II system does not output coding signals or output safety side coding, and fault guiding is safe.

The coding condition output circuit is used for sending the coding conditions to the coding transmitter through the coding condition terminal board, for example, the coding condition output circuit is a double-switch protection output circuit, the coding condition source is from the coding transmitter, the coding condition output circuit adopts the normally open contacts of the 2 forced guiding contact relays as a primary switch, and the coding condition power supply from the outside is conducted to be output as the coding conditions.

For example, as shown in fig. 5, the coding condition output circuit includes a first-stage switch and a second-stage switch that are connected to each other, the first-stage switch includes a normally open node of 2 coding condition main switch relays, the 2 coding condition main switch relays are controlled by a second safety power supply and a third safety power supply, the normally open contacts of the 2 coding condition main switch relays are connected in parallel, the normally open contacts of 1 coding condition main switch relay are kept closed, and the normally open contacts of the other 1 coding condition main switch relay are opened.

The second-stage switch comprises a normally open contact of the coding relay, the total power supply of the coding relay exciting circuit is a first safety power supply, and the first CPU controls the relay exciting circuit on a channel output by the first safety power supply to control the lifting and falling of the coding relay.

For example, the 4-way coding condition external source input (GS 1-GS 4) is connected with one end of the normally open node of the 2 coding condition main switch relays, the other end of the normally open node of the 2 coding condition main switch relays is connected with the normally open contact of the coding relay, and when the number of the coding relays is multiple, the coding relays are respectively controlled in groups. For example, the encoder relays 1 to 5 and the encoder relays 6 to 10 are respectively provided with 1 isolation driving circuit, and the first CPU controls the sucking up and dropping down of the encoder relays 1 to 10 respectively through 2 relay exciting circuits.

For example, the coding relay excitation circuit comprises an optocoupler controller, a first resistor, a second resistor and a PMOS (positive channel Metal Oxide Semiconductor) tube, wherein the first safety power supply is a 24V power supply, the optocoupler controller comprises a first diode and a first phototriode, a control signal of the first CPU is input from the anode of the first diode, the cathode of the first diode is grounded, the first end of the first resistor is connected with the collector of the first phototriode, the first end of the second resistor is connected with the emitter of the first phototriode, the two ends of the first safety power supply are respectively connected with the second end of the first resistor and the second end of the second resistor, the second end of the first resistor is also connected with the source electrode of the PMOS tube, the second end of the second resistor is also connected with the first end of the coil of the coding relay, the drain electrode of the PMOS tube is connected with the second end of the coil of the coding relay, and the grid electrode of the PMOS tube is connected with the first end of the first resistor and the collector of the first phototriode.

The embodiment of the application adopts the control measures of the multi-stage switch to increase the safety of the full-electronic coding and signal transmission device, if a certain stage of switch fails, such as relay contact adhesion, the NO and NC contacts of the coding relay are dynamically collected by the double CPU to identify the output state of the coding relay for drive and check, and after confirming inconsistent drive and drive faults, the output can be stopped by closing the other stage of relay switch, thereby guaranteeing the safety of the module.

The first CPU and the second CPU are used for simultaneously collecting normally open contacts (NO) and normally closed contacts (NC) of all relays (comprising CJ, a coding relay, QHJ and a coding condition main switch relay) through a dynamic safety collecting circuit, judging the consistency of driving and collecting, judging the mutual exclusivity of the contacts, alarming and guiding to a safety side after faults occur, and following a 2-out-of-2 safety design structure.

In order to reliably detect the states of the relay contacts, the NO and NC contacts of the relay adopt DC24V self-checking condition power supplies, the first CPU and the second CPU conduct dynamic code sending collection on the NO and NC contacts of the relay at the same time, the dual CPU judges the collection result states to conduct driving and consistency collection inspection and mutual exclusion inspection on the relay contacts, and the collection results and judgment results of the NO and NC are compared in two-to-two mode.

The return detection of normally open and normally closed contacts of the relay adopts an inherent dynamic safety acquisition circuit, as shown in fig. 6, the dynamic safety acquisition circuit comprises a first acquisition circuit and a second acquisition circuit which are identical in structure, the first CPU carries out dynamic code sending acquisition on NO and NC contacts of the relay through the first acquisition circuit, and the second CPU carries out dynamic code sending acquisition on NO and NC contacts of the relay through the second acquisition circuit.

The first acquisition circuit and the second acquisition circuit comprise a normally open contact acquisition branch, a normally closed contact acquisition branch and a control branch, wherein the first end of the normally open contact acquisition branch is connected with the positive electrode of the self-checking condition power supply, the second end of the normally open contact acquisition branch is connected with the first end of the control branch, the second end of the control branch is connected with the negative electrode of the self-checking condition power supply, the first end of the normally closed contact acquisition branch is connected with the positive electrode of the self-checking condition power supply, and the second end of the normally closed contact acquisition branch is connected with the second end of the normally open contact acquisition branch and the first end of the control branch.

The normally open contact acquisition branch and the normally closed contact acquisition branch comprise a first current limiting resistor, a reading optocoupler, a third resistor and a second diode, the reading optocoupler comprises a third diode and a second phototriode, a first end of the first current limiting resistor is connected with a positive electrode of a self-checking condition power supply, a second end of the first current limiting resistor is connected with an anode of the third diode, a cathode of the third diode is connected with an anode of the second diode, a collector of the second phototriode is used as a reading point A, a collector of the second phototriode is further connected with a first end of the third resistor, a voltage between a second end of the third resistor and the reading point A is 3.3V, and an emitter of the second phototriode is grounded.

The control branch circuit comprises a control optocoupler and a second current limiting resistor, the control optocoupler comprises a fourth diode and a third phototriode, wherein a collector electrode of the third phototriode is connected with a cathode of the second diode in the normally open contact collecting branch circuit and a cathode of the second diode in the normally closed contact collecting branch circuit, an emitter of the third phototriode is connected with a cathode of a self-checking condition power supply, a cathode of the fourth diode is used as a control point B, an anode of the fourth diode is connected with a first end of the second current limiting resistor, and a second end of the second current limiting resistor is connected with a voltage of the control point B to be 3.3V.

The dynamic safety acquisition circuit principle is as follows: the NO and NC joints of the relay adopt DC24V self-checking condition power supplies, the first CPU and the second CPU perform dynamic code sending acquisition on the NO and NC joints of the relay at the same time, the first CPU and the second CPU judge the acquisition result state to perform driving and acquisition consistency check and mutual exclusion check on the relay joints, and perform two-to-two comparison on the acquisition results and judgment results of the NO and the NC.

When the dynamic safety acquisition circuit carries out the recheck on the relays, the normally open contact acquisition branch and the normally closed contact acquisition branch share one control branch, namely the relay contact self-check shares 1 control branch.

For example, there are 21 relays on the board, and under normal conditions, each CPU needs 21 dynamic code sending and signal collecting, and is limited by MCU resources, and the 18 relays all adopt 2 relay contact self-checking to share 1 control branch, and the 3 relay contact self-checking circuit is 1 relay self-checking to use 1 control branch.

The first CPU and the second CPU time-sharing multiplex IO ports read the contact state of the relay through a dynamic safety acquisition circuit, and different dynamic control signals are adopted by adjacent channels.

For example, since 21 relays NO and NC status are checked back, 42 IO ports are required, if each NO or NC status occupies 1 IO port, the number of existing IO ports of the CPU cannot meet the requirement, so that the contact status of the relays is obtained by using a mode of time-sharing multiplexing the IO ports, each CPU uses 5 8-bit bus buffers, and the CPU reads the normally open and normally closed contact status of each relay in a time-sharing manner. For adjacent contact states on the physical channels, different dynamic control signals are used by adjacent channels to ensure that the adjacent channels do not cross-talk with each other in order to prevent erroneous reads after unexpected erroneous connections. Meanwhile, the software also performs balance processing, and adopts some tolerance strategies for some accidental interference, so that the working stability of the all-electronic coding and signal transmission device is ensured.

The self-checking signals sent by the first CPU and the second CPU are dynamic signals, and the contact state of the relay is judged according to the acquired result in the set time.

As shown in fig. 7, the internal software structure of the full electronic coding and signal transmission device comprises four parts of a platform hardware layer, an operating system layer, a platform software layer and module application software. The platform hardware layer and the operating system layer provide basic support (mainly for driving functions and operating system scheduling) for platform software and application software. The application software runs on the basis of the platform software, and the application software and the platform software work cooperatively to jointly realize the functions of the full-electronic coding and signal transmission device.

The software is designed from top to bottom based on a process-oriented analysis method. And the software is divided into functional modules by adopting a modularization technology, and a definite inter-module interface is defined. The whole software adopts a mode of multitasking parallel execution, and after initialization is completed, each functional task is managed, scheduled and executed by an operating system.

The first CPU and the second CPU of the single module are provided with fixed ID numbers by hardware, and the first CPU and the second CPU enable software to flow to the first CPU and the second CPU of the branch by reading the fixed ID numbers.

Based on the above all-electronic coding and signal transmission device, the embodiment of the application also provides an all-electronic coding and signal transmission method, which comprises the following steps: determining the type of the output coding condition according to the type information of the coding transmitter and the coding mode information; the control relay excitation circuit and the coding condition output circuit output coding conditions; the working states of the real-time monitoring relay exciting circuit and the coding condition output circuit are specifically as follows: and meanwhile, normally open and normally closed contacts of the coded transmission relay, the coded relay, the switching relay and the coded condition main switch relay are collected, the consistency of driving and mining and the mutual exclusivity of the contacts are judged, and the alarm is given after the fault occurs and the safety side is led.

The full-electronic coding and signal transmission device and the method of the embodiment of the application are suitable for the configuration modes of various scenes, are suitable for relay coding transmitters and communication coding transmitters, control 8 sections at most by one module, ensure the safety, provide codes for 2 transmitters and provide codes for redundant +1 transmitters, and can provide 10 coding conditions at most.

The application ensures that after single system module fails, the other system work is not influenced, dangerous output is not generated and the system can be guided to the safety side through the arrangement of the switching circuits (the first switching relay and the second switching relay) in the positive line path coding type.

The coding condition output circuit of the coding source enhances the safety of the module by arranging multiple safety switches.

Although the application 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. The full-electronic coding and signal transmission device is characterized by comprising a two-in-two coding module I system and a two-out-of-two coding module II system, wherein the coding module I system and the two-in-two coding module II system both comprise a processor control circuit, a relay excitation circuit, a coding condition output circuit and a dynamic safety acquisition circuit;

2. The all-electronic coding and signal transmission device according to claim 1, wherein the electronic coding and signal transmission device further comprises a coding condition terminal board and an encoding frequency shift signal terminal board;

3. The all-electronic coding and signaling device of claim 2, wherein the coded modules I and II each further comprise a first safety power source, a second safety power source, a third safety power source, and a fourth safety power source; the relay excitation circuit comprises a coding relay excitation circuit and an encoding transmission relay excitation circuit;

4. The all-electronic coding and signal transmission apparatus according to claim 3, wherein the processor control circuit includes a first CPU and a second CPU, the first CPU and the second CPU being connected, wherein the first CPU is configured to control the coding relay excitation circuit and the coded transmission relay excitation circuit, each of the safety power supplies converts dynamic pulse width control signals from the first CPU and the second CPU into a dc power supply that can drive the relay, and when any one of the CPU dynamic pulse width control signals does not exist, output of the dc power supply is stopped.

5. The all-electronic encoding and signaling device of claim 4, wherein the first CPU and the second CPU are further configured to self-test the dynamic pulse width control signal input to each of the safety power sources.

6. The all-electronic encoding and signaling device of claim 1, wherein the encoding condition output circuit comprises a first stage switch and a second stage switch connected to each other;

7. The full-electronic coding and signal transmission device according to claim 3, wherein the first CPU and the second CPU are further configured to collect normally open and normally closed contacts of the coded transmission relay, the coding relay, the switching relay and the coding condition main switch relay simultaneously through the dynamic safety collection circuit, judge driving consistency and contact mutual exclusivity, alarm after a fault and guide to a safety side.

8. The full-electronic coding and signal transmission device according to any one of claims 3 to 5, wherein 2 switching relays are provided, the first switching relay and the second switching relay share 1 fourth safety power supply, the first switching relay and the second switching relay are fixedly controlled by the coding module I, and when the coding module I is in the control mode, the first switching relay and the second switching relay are driven to be attracted up, and otherwise, the first switching relay and the second switching relay are in the falling state.

9. The all-electronic coding and signal transmission device according to claim 8, wherein in the positive line path coded type, the first switching relay and the second switching relay each include 3 sets of normally open contacts and 3 sets of normally closed contacts;

10. The full-electronic code and signal transmission device according to any one of claims 3 to 5, wherein the dynamic safety acquisition circuit comprises a first acquisition circuit and a second acquisition circuit with the same structure, the first CPU performs dynamic code transmission acquisition on the normally open contact and the normally closed contact of the relay through the first acquisition circuit, the second CPU performs dynamic code transmission acquisition on the normally open contact and the normally closed contact of the relay through the second acquisition circuit, and the first acquisition circuit and the second acquisition circuit each comprise a normally open contact acquisition branch, a normally closed contact acquisition branch and a control branch.

11. The device of claim 10, wherein the plurality of normally open and normally closed contact acquisition branches share a control branch when the dynamic safety acquisition circuit rechecks the plurality of relays.

12. The device for fully electronic coding and signal transmission according to claim 10, wherein the first CPU and the second CPU time-division multiplex the IO ports obtain the contact state of the relay through a dynamic security acquisition circuit, and different dynamic control signals are adopted for adjacent channels.

13. The device of claim 10, wherein the first CPU and the second CPU are further configured to determine a relay contact state according to a result acquired within a set time after sending a dynamic control signal to the dynamic security acquisition circuit.

14. The all-electronic coding and signaling device of claim 1, wherein the configuration information includes coded transmitter type information and coded mode information.

15. An all-electronic coding and signal transmission method, characterized by comprising the following steps:

16. The all-electronic coding and signaling method of claim 15, wherein monitoring the operating states of the relay excitation circuit and the coding condition output circuit in real time comprises the steps of: