CN104228876A - Remote axle-counting preliminary reset system and remote axle-counting preliminary reset method - Google Patents

Abstract

The invention discloses a remote axle counting pre-reset system, comprising: an ATS server that outputs a remote axle counting pre-reset command, a power supply, an ACE, a PLC that controls the ACE to perform pre-reset according to the remote axle counting pre-reset command, and a relay group and PMI, wherein, each relay coil in the relay group is respectively connected to the PMI, and each normally open contact is sequentially connected in series between the power supply and the PLC; the PMI receives the remote axle counting preset Reset command, drive each relay in the relay group to maintain a high position to connect the power supply and the PLC, and retrieve; the ATS server learns that each relay in the relay group maintains In a high state, send the remote axle counting pre-reset command to the PLC. The present invention uses PMI to replace the watchman's action enabling PLC, which is safe and reliable, and avoids the risk brought by manual operation.

Description

System and method for pre-resetting remote axis recording

technical field

The invention relates to the field of train monitoring, in particular to a system and method for restoring the state of a disturbed axle counting section ACB (AxleCounter Block).

Background technique

At present, the axle counting equipment communicates with PMI (Poste de Manoeuvre Informatisé (Computer Based Interlocking system), computer interlocking subsystem) through the discrete I/O port of ACE (Axle Counter Evaluator, axle counting evaluator). The axle counting device counts the number of train axles passing a certain position in a certain direction, and each axle counting device reports to ACE the number and direction of the axles passing by its position every 200 milliseconds, and then ACE calculates the number and direction of the train axles passing by its location according to the Counting of all axle counting equipment to calculate the occupancy of ACB (AxleCounter Block, axle counting section), and report the result to PMI.

There are four states for each ACB in ACE: unoccupied, occupied, disturbed and pre-reset. An ACB is considered disturbed if the following conditions are met:

1) ACE suspends; 2) ACE restarts; 3) The communication between the detection point magnetic head and ACE is disturbed; 4) The communication between ACEs is disturbed, and this section is the common section of two or all ACEs; 5) the area The segment is idle, and an error warning from the detection point is received; 6) The axle count value of the segment is negative; 7) The two count values of the ACB detection point are inconsistent, or the number of remaining axles in the detected segment is lower than a threshold value, considered to be less than the number of axles of the train (default is 1, but configurable).

An ACB disturbed state indicates a segment failure, and for a disturbed ACB, PMI will consider it occupied. In order to clear the fault, the following procedure needs to be followed:

Send a pre-reset command to the disturbed ACB through ACE to clear all axle counters in this section.

While following safety procedures, it is possible to drive a manual mode train or "dummy wheel" past the ACB's two axle counters. Before this process is completed, the ACB is still in the disturbed state.

If the number of axles entering and leaving the ACB is consistent again, the disturbed state is cleared. If the numbers are still inconsistent, the ACB remains disturbed and another "pre-reset" command is required.

In the existing system design, there are two ways to realize "pre-reset". One is that the operator on duty in the control center sends a remote axle counter pre-reset command to the PLC (Programmable Controller) from the ATS (Automatic Train Supervision, automatic train supervision subsystem), and the local operator presses the button in the control room The button connects the power to enable the PLC, and the PLC controls the ACE to issue a pre-reset command to the disturbed ACB. As shown in Figure 1 and Figure 2. Another way is that the local watchman uses the key switch on the parallel input and output board to issue a pre-reset command to the disturbed ACB. Since the ACE cabinet is placed in the equipment room, this method requires maintenance personnel to go to the equipment room every time for operation, which is inconvenient and unsafe.

Therefore, in the current operation, the first pre-reset method is more commonly used. To pre-reset a disturbed axle counting section requires a push button by the local attendant to enable PLC power after the ATS subsystem commands the PLC. However, it should be noted that PLC is not a safety subsystem, and this method requires the action of the watchman every time the axle counter is pre-reset. When a train is already occupied in an ACB, there is a risk of pre-resetting by misoperation.

Contents of the invention

The purpose of the present invention is to provide a remote axis recording pre-reset system and method, which uses PMI to replace the watchman's action enabling PLC, which is safe and reliable, and avoids the risks caused by manual operation.

The technical scheme for realizing the above-mentioned purpose is:

One of the remote axle counting pre-reset systems of the present invention includes: an ATS server that outputs a remote axle counting pre-reset command, a power supply, an ACE, a PLC that controls the ACE to perform a pre-reset according to the remote axle counting pre-reset command, and a relay group and PMI, where,

Each relay coil in the relay group is respectively connected to the PMI, and each normally open contact is sequentially connected in series between the power supply and the PLC;

The PMI receives the remote axle counting pre-reset command, drives each relay in the relay group to maintain a high position to connect the power supply and the PLC, and recovers;

The ATS server learns that each relay in the relay group maintains a high state according to the recovery signal of the PMI, and sends the remote axle counting pre-reset command to the PLC.

In the above remote axle counting pre-reset system, the relay group includes two relays.

In the above-mentioned remote shaft counting pre-reset system, the PMI retrieves the output status of each relay in the relay group and sends it to the ATS server; the ATS server judges that each relay is fault-free and is at a low level according to the retrieval information state, output the remote axle counter pre-reset command to the PMI.

In the above-mentioned remote axle counting pre-reset system, the relay failure refers to: the output state is inconsistent with the recovery state, and the inconsistent state lasts for more than 200 milliseconds.

The second remote axis pre-resetting method of the present invention includes:

The ATS server sends a remote axle counting pre-reset command to the PMI;

The PMI outputs an enable command, drives each relay in the relay group to maintain a high state, retrieves the state information of each relay and returns the information to the ATS server;

After the ATS server confirms that each relay is in a high state according to the mining information, it sends a remote axis pre-reset command to the PLC;

The PLC controls the ACE to perform a pre-reset.

In the above-mentioned remote shaft counting pre-reset method, the sending of the remote shaft counting pre-reset command includes:

The ATS server sends an initial pre-reset command to the PMI, and the PMI returns to confirm receipt of the command;

The ATS server sends a confirmation pre-reset command to the PMI.

In the above-mentioned remote shaft counting pre-reset method, the PMI outputs an enabling command to drive each relay in the relay group to maintain a high state for 7 seconds.

In the above remote axle counting pre-resetting method, the PLC controls the output to the ACE for 3 seconds.

In the above remote axle counting pre-reset method, the ATS server receives a pre-reset command sent by the operator, and then sends a remote axle counting pre-reset command to the PMI.

In the above-mentioned remote axle counting pre-reset method, the ATS server retrieves the output status of each relay in the relay group according to the PMI, and when judging that each relay has no fault and is in a low state, outputs a remote axle counting pre-reset command to the PMI.

The beneficial effects of the present invention are: the present invention solves the current need for cleaning every time the ACB is disturbed, requiring the local attendant to go to the operating room to manually press the button once, and the risk of reducing work reliability due to manual operation. By using the ATS to issue safety commands to the interlock safety subsystem PMI instead of the action of the watchman to enable the PLC, the remote axis pre-reset is realized.

Description of drawings

Fig. 1 is a schematic structural diagram of a traditional system for realizing remote axis pre-resetting;

Fig. 2 is the specific structural diagram of the traditional system for realizing the pre-reset of remote shaft recording;

Fig. 3 is a structural diagram of the remote axle recording pre-reset system of the present invention;

Fig. 4 is a state machine diagram of the remote axle recording pre-reset system of the present invention;

Fig. 5 is a flow chart of the remote axle counting pre-resetting method of the present invention.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing.

Please refer to Fig. 3, the remote axle counting pre-reset system of the present invention includes ATS server, PLC, ACE, PMI and relay group, wherein:

The ATS server is connected to PMI and PLC respectively through Ethernet; PLC is connected to ACE; each relay coil in the relay group is respectively connected to PMI, and each normally open contact is connected in series between the power supply and PLC.

The ATS server is used to output the remote axle counting pre-reset command; the PMI receives the remote axle counting pre-reset command, drives each relay in the relay group to keep the high position to connect the power supply and PLC, and returns;

According to the recovery signal of PMI, the ATS server sends the remote axle counting pre-reset command to the PLC after knowing that each relay in the relay group is in a high state;

PLC controls ACE to perform pre-reset according to the remote axle counter pre-reset command.

In this embodiment, two relays are defined in the relay group, and the two relays are identical. Using two identical relays is from a safety point of view, the state expressed is more accurate, and the control is more stable. It can be seen from Figure 3 that the functions of these two relays are the same as those of the PLC enable button. PMI controls the output state of these two relays, and the feedback. When any relay fails (the output is inconsistent with the recovery state, and the inconsistent state lasts for more than 200 milliseconds), PMI will send an alarm to the ATS server. According to the status of the two relays, PMI sends the status report of the mining back to the ATS server.

When any of the following situations occurs, PMI will not accept the remote axle counter pre-reset command from the ATS server:

Any one of the two relays fails;

Any one of the two relays will be in high position.

The PMI will be able to accept the remote axle counter pre-reset command from the ATS server when the following conditions are met:

There is no fault in either relay;

The feedback status is low in both relays.

The operator on duty in the control center or the ATS server itself judges whether a remote axle counter pre-reset command can be sent from the ATS server to the PMI according to the status reported by the PMI. If the status of the PMI report is unacceptable, the ATS server command will be ignored.

A state machine diagram can be used to represent the internal logic design of the PMI function:

As shown in Figure 4, from the logic point of view of this design: when the PMI is initially started, it is in the 0 state, there is no input and output, and there is no internal variable change. After startup, the logic state is 1, 4, 6, 8, and then PMI will change the internal logic state according to the real state of the trackside.

State transitions are illustrated with the following steps:

1. After starting, if the PMI detects that the two relays are not faulty, and the state of the two relays is low, the state 8 will jump to 9, that is, the PMI can accept the initial pre-reset command of the ATS, and the logic state is 1, 4, 6, 9, after accepting the ATS initial pre-reset command at this time, state 1 will jump to 2, 10-second countdown (if state 9 jumps to 8 during the countdown, the 10-second countdown will be interrupted and state 2 will jump to 1) After the end, state 2 will automatically jump to 3, and ATS will send a confirmation pre-reset command within 20 seconds, and state 3 will jump back to 1 (special case 1: if ATS does not receive a confirmation pre-reset command within 20 seconds countdown , the countdown is invalid after 20 seconds, and the axis pre-reset command is also invalid, and the state jumps from 3 to 1. Special case 2: If the state 9 jumps to 8 when the ATS confirms the pre-reset command has not been received within 20 seconds countdown, then The 20-second countdown is interrupted, the axis counting pre-reset command is invalid, and the state jumps from 3 to 1.), a complete remote axle counting pre-reset command is sent, the state 4 will jump to 5, and the PMI drives two output relays to high . And because the design requires that the PMI cannot accept the ATS initial pre-reset command when any relay is high, the state 9 will jump to 8, and the logic states are 1, 5, 6, and 8. After the 7-second countdown of the PMI output relay to the high position, the state 5 will automatically jump to 4, and the state 8 will also jump to 9 again, ready to accept the next ATS remote axle counter pre-reset command. At this time, the logical state returns to 1, 4, 6, and 9.

2. When the PMI detects a fault in one of the relays, the state will jump from 6 to 7. According to the design, if there is a fault, the PMI will not accept the ATS pre-reset command, and the state 9 will jump to 8, and the logic state is 1, 4 , 7, 8. At this time, if the ATS sends the initial pre-reset command to the PMI, it will not be able to jump from 1 to 2 because the PMI cannot accept the ATS command at this time.

3. PMI detects that the relay fault is restored, and the status of both relays is low, then the status will jump from 7 to 6, and the status 8 will jump to 9, and the logic status is 1, 4, 6, 9. At this time, if ATS sends the remote axle counter pre-reset command, refer to step 1.

Please refer to Fig. 5, the remote shaft counting pre-resetting method based on the above-mentioned remote shaft counting pre-resetting system of the present invention includes the following steps:

The ATS server receives the pre-reset command sent by the operator, or, according to the output status of the two relays retrieved by the PMI, the ATS server judges that the two relays are not faulty and are in a low state, and outputs a remote axle counting pre-reset command to the PMI , the remote axle counter pre-reset command is a safety command that requires a second confirmation. First, the ATS server will send an initial remote axle counting pre-reset command, and the PMI will report to the ATS server 10 seconds after receiving it (return to confirm receipt of the command). The ATS server sends a confirmation remote axle counting pre-reset command again within 20 seconds, so that the PMI will actually accept this command, drive two output relays and keep the relays in the high state for 7 seconds. The output relay is set to a low state. The definition of 7 seconds is to take into account: the communication delay between ATS and PLC is 2 seconds + PLC output is 3 seconds + a margin of 2 seconds.

PMI outputs the enable command, drives the two relays to maintain the high state, retrieves the status information of the two and returns the retrieved information to the ATS server;

After the ATS server confirms that the two relays are in the high state according to the mining information, it sends a remote axle counter pre-reset command to the PLC; the PLC controls the output of the ACE for 3 seconds, enough for the ACE to reset the axle counters in the disturbed section. When the train or the simulated wheel cleans the disturbed ACB and recovers, the ATS server shows that the ACB is in a normal state.

To sum up, the present invention is independent, does not affect other interlocking functions, and can be configured from the interlocking table according to the different requirements of each line and each customer. For PMI software, when the column "ACB_RPEPRESET_RELAYS" in the interlock table is empty, this function will not be realized, but as long as the names of the two output relays are defined in the interlock table, this function can be realized. In this way, the PMI is used to replace the manual operation button to enable the PLC. However, the ACE cabinet and interface have not changed in any way, and maintenance personnel can still use the key switch to realize the pre-reset of the axle counter.

In Fig. 3, DCS represents the distributed control system; CPU represents the central processing unit.

The above embodiments are only for the purpose of illustrating the present invention, rather than limiting the present invention. Those skilled in the relevant technical fields can also make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent The technical solutions should also belong to the category of the present invention and should be defined by each claim.

Claims (10)

1. a long-range note axle pre-reset system, comprising: export the ATS server of long-range meter shaft pre-reset order, power supply, ACE and control according to the order of described long-range meter shaft pre-reset the PLC that described ACE performs pre-reset;

It is characterized in that, also comprise: relay group and PMI, wherein,

Each relay coil in described relay group connects described PMI respectively, and each open contact is serially connected between described power supply and described PLC successively;

Described PMI receives the order of described long-range meter shaft pre-reset, drives each relay in described relay group to keep high-order to connect described power supply and described PLC, and back production;

Described ATS server, according to the back production signal of described PMI, is learnt that in described relay group, each relay all keeps high-end trim, is sent the order of described long-range meter shaft pre-reset to described PLC.

2. long-range note axle pre-reset system according to claim 1, it is characterized in that, described relay group comprises two relays.

3. long-range note axle pre-reset system according to claim 1, it is characterized in that, the output state of each relay in relay group described in described PMI back production, sends to described ATS server; When described ATS server judges the equal trouble free of each relay according to back production information and is all in low-end trim, export the order of described long-range meter shaft pre-reset to described PMI.

4. long-range note axle pre-reset system according to claim 3, it is characterized in that, described relay fault refers to: output state and back production inconsistent, and this inconsistent state continue more than 200 milliseconds.

5., based on a long-range note axle pre-reset method for note axle pre-reset system long-range described in claim 1 or 2, it is characterized in that, comprising:

Described ATS server sends the order of long-range meter shaft pre-reset to described PMI;

The order of described PMI output enable, to drive in described relay group each relay to keep high-end trim, and back production information is also returned to described ATS server by the status information of each relay of back production;

After described ATS server is all positioned at high-end trim according to each relay of back production validation of information, send the order of long-range note axle pre-reset to described PLC;

Described PLC controls described ACE and performs pre-reset.

6. long-range note axle pre-reset method according to claim 5, it is characterized in that, the order of described transmission long-range meter shaft pre-reset, comprising:

Described ATS server sends initial pre-reset order to described PMI, and described PMI returns and acknowledges receipt of instruction;

Described ATS server sends and confirms that pre-reset order is to described PMI.

7. long-range note axle pre-reset method according to claim 5, is characterized in that, the order of described PMI output enable, drives each relay in described relay group to keep high-end trim 7 seconds.

8. long-range note axle pre-reset method according to claim 5, is characterized in that, described PLC controls to the output 3 seconds of described ACE.

9. long-range note axle pre-reset method according to claim 5, is characterized in that, described ATS server receives the pre-reset instruction that operator sends, then sends the order of long-range meter shaft pre-reset to described PMI.

10. long-range note axle pre-reset method according to claim 5, it is characterized in that, the output state of each relay in described ATS server relay group according to described PMI back production, when judging the equal trouble free of each relay and be all in low-end trim, export the order of long-range meter shaft pre-reset to described PMI.