CN117734769A - Urban rail three-phase alternating-current five-wire system turnout position detection method and device - Google Patents
Urban rail three-phase alternating-current five-wire system turnout position detection method and device Download PDFInfo
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- CN117734769A CN117734769A CN202311627628.XA CN202311627628A CN117734769A CN 117734769 A CN117734769 A CN 117734769A CN 202311627628 A CN202311627628 A CN 202311627628A CN 117734769 A CN117734769 A CN 117734769A
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- 238000010586 diagram Methods 0.000 description 7
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Abstract
The invention belongs to the field of urban rail train signal systems, and discloses a method and a device for detecting the position of an urban rail three-phase alternating-current five-wire system turnout, wherein the detection method is to determine a point machine circuit at different positions by analyzing the action principle of the five-wire system turnout; then, according to the output voltage on the switch circuit control X1, designing voltage acquisition circuits on X2, X3, X4 and X5; and finally judging the actual position and the line state of the turnout according to the acquisition value of the voltage acquisition circuit. The voltage acquisition circuit adopts direct-current voltage to separate an action power supply and an acquisition power supply of the switch machine, so that the usability of the system is improved. And line faults are automatically detected, and the usability and maintainability of the system are improved. The circuit is compatible with the original relay circuit, and is beneficial to smooth upgrade from the relay circuit to the full-electronic system.
Description
Technical Field
The invention relates to the field of urban rail train signal systems, in particular to a method and a device for detecting the position of an urban rail three-phase alternating-current five-wire system turnout.
Background
Railway turnouts are important signal equipment in train operation and are used for adjusting the running direction of a train, and when the train runs through the turnouts, if the turnouts are abnormal, the running safety of the train can be seriously threatened. The method has important significance in detecting and monitoring the turnout with high reliability and high reliability.
The current common turnout position detection method is to realize the collection of turnout positions by using turnout indication voltage, and has the following defects:
the position acquisition voltage is high-voltage power, and power-off operation is needed when manual maintenance detection and fault removal are performed, so that maintenance time is relatively long. If a certain line is broken, the switch position is in the meter losing state, but the fault line cannot be automatically identified, and the maintenance efficiency is low.
A separate configuration of a power supply and power supply lines for the presentation circuit is required.
The method for detecting the position and the line fault of the turnout by adopting a safer, more convenient and higher reliability is an effective measure for realizing high availability and safe operation of the train.
Disclosure of Invention
In order to solve the problems in the prior art and realize safe, convenient and high-reliability detection of the position and line faults of the turnout, the invention provides a method and a device for detecting the position of the urban rail three-phase alternating-current five-wire turnout.
In a first aspect, a method for detecting the position of a urban rail three-phase alternating-current five-wire system turnout is provided, which comprises the following steps:
s1: analyzing the action principle of the five-wire turnout, determining the switch machine circuits at different positions, and adopting a direct current positive and negative voltage circuit;
s2: and (3) respectively adding comparators on X2, X3, X4 and X5 according to the output voltage on the switch circuit control X1, and judging the actual position of the switch by the acquired values of the voltages on X2, X3, X4 and X5.
Furthermore, the designed voltage acquisition circuit is compatible with a conventional five-wire switch control relay circuit, and can be directly upgraded without changing a circuit.
Furthermore, the switch machine circuit does not use alternating current, and the direct current positive and negative voltage is converted by the direct current power supply operated by the full electronic system.
Further, the switch machine circuit includes: the circuit characteristics at the locate, flip and neutral positions are shown to represent the orientation and position of the diode.
Further, controlling the output voltage on X1 includes: after the switch machine is in place, the driving circuit is cut off, the indicating relay is connected, and the switch machine cable is connected into the indicating circuit.
Further, a voltage acquisition circuit is designed, comprising: according to the circuit principle, a diode is arranged on an X2 line during positioning, a diode is arranged on an X3 line during inversion, and the voltage acquisition circuits on X2 and X3 are designed to be 3 comparators, so that the voltage acquisition circuits can respectively judge that the voltage is greater than 0V and less than 0V and the absolute value is greater than 0V; the voltage acquisition circuits on X4 and X5 are 1 comparator, which can judge that the voltage is larger than 0V.
Further, judging the switch position according to the collection value includes: according to the principle, a truth table is listed, the FPGA of two different power domains respectively acquire voltage values on X2, X3, X4 and X5, switch positions and line on-off states are respectively judged according to the voltage values, and the two FPGA of the switch position judgment values perform interactive voting, so that the safety of switch position judgment is ensured.
In a second aspect, a device for detecting the position of a urban rail three-phase alternating current five-wire switch is provided, comprising: a processor coupled to the memory; the memory is for storing computer instructions which, when executed by the processor, cause the apparatus to perform the method as described in the first aspect.
The beneficial effects of the invention are as follows:
the current common turnout position detection method is to use turnout indication voltage to realize the collection of turnout position, the position collection voltage is high voltage, and the manual maintenance detection and fault removal need to be powered off, so that the maintenance time is relatively long. The direct-current voltage is adopted, the action power supply and the acquisition power supply of the switch machine are separated, the position acquisition circuit can be tested without power failure, the line faults are automatically detected, and the availability and maintainability of the system are improved.
The current common turnout position detection method needs to configure a power supply and a power line for the indication circuit independently. The circuit compatible original ZDJ9 relay circuit in the application does not need to be configured with a power supply and a power line, and is favorable for smooth upgrading from the relay circuit to an all-electronic system.
In the conventional turnout position detection method, if a certain line is broken, the turnout position is in a meter losing state, but cannot be automatically identified. The method and the device can automatically detect the line faults and improve the usability and maintainability of the system.
The position and line fault detection of the turnout in the method are safer, more convenient and more reliable, and are effective measures for realizing high availability and safe operation of the train.
Drawings
FIG. 1 is a schematic block diagram of a five wire switch machine;
FIG. 2 is a simplified schematic block diagram of a five-wire switch;
fig. 3 is a functional block diagram of position detection.
Detailed Description
The technical scheme of the invention is specifically described below with reference to the accompanying drawings.
The switching and locking of the five-wire switch are realized by a five-wire switch machine, and the schematic block diagram of the ZDJ9 five-wire switch machine is shown in figure 1: when the five-wire turnout acts, the contact points are driven to act correspondingly, when the turnout is positioned, the 1 node and the 3 node are closed, the 2 node and the 4 node are opened, the diode is connected into a loop, and the X2 connection represents the anode of the diode. When the turnout is in the reversed position, the nodes 1 and 3 are opened, the nodes 2 and 4 are closed, the turnout is connected into a loop, and the X3 is connected with the cathode of the diode. When the turnout runs to the intermediate state 1, the nodes 1 and 4 are closed, the nodes 2 and 3 are opened, and the condition that the diode is not in the loop is indicated that the diodes X1, X2, X3, X4 and X5 are all in the loop.
According to the principle of turnout operation, a simplified diagram of a turnout circuit is drawn, and is shown in fig. 2.
The circuit for collecting the position is designed according to the invention, and the circuit block diagram is shown in figure 3.
3 comparator circuits are designed on X2 and X3, and 1 comparator circuit is designed on X4 and X5.
The acquisition circuit has a self-correcting function, 2 comparison values are inconsistent between any two states, and the 2 comparison values are switched between 0 and 1. The acquisition can be ensured not to be misjudged.
The comparison circuit of X4 and X5 is used for judging whether X4 and X5 are open or not. When the X4 is positioned, X4 is acquired as 1 when positive voltage is output, X4 is acquired as 0 when negative voltage is output, and the X4 circuit is normal, and when positive and negative voltages are output, X4 is acquired as 0, the X4 circuit is broken. Similarly, when the positive voltage is output, the X5 is collected to be 1, the X5 is collected to be 0 when the negative voltage is output, which indicates that the X4 line is normal, and when the positive voltage and the negative voltage are output, the X5 is collected to be 0, which indicates that the X5 is broken. If the state is the intermediate state, the states of the X4 and X5 circuits can be judged at the same time, and the method is the same as the previous method.
The circuit designed by the invention is based on an all-electronic interlocking control system, and a circuit block diagram is shown in figure 3.
When the switch machine is not driven, the full electronic system can be connected with the relay in fig. 3, the relay adopts a safety relay, and the normally closed contact of the relay adopts a pulse detection mode, so that the reliability of a detection circuit is ensured. Indicating that the relay connects the acquisition circuit with the switch machine circuit. The detection principle is as follows: positive and negative voltages are alternately output on X1, and voltage states on X2, X3, X4 and X5 are collected. The unidirectional conductive characteristic of the diode is utilized to distinguish the disconnection state from the positioning and inversion state. The corresponding voltage collecting states of the switch machine in the positioning, inversion and intermediate states are shown in the following table respectively.
Table 1 collected values when the switch machine was in position
Table 2 collected values when the switch machine is in the inverted position
Table 3 collected values when the switch machine was in the neutral state
The table above will be described by taking the case when the switch machine is in position, when X1 outputs a positive voltage, it means that the diode is not turned on, the voltage collected by X2 is 0, and the voltage collected by X3 is positive. When X1 outputs negative voltage, the diode is turned on, and X2 and X3 collect negative voltage. Other positions are consistent in principle. By combining the acquisition circuit principle, the scheme can realize that no matter the cable is connected in error or the cable is disconnected, the erroneous judgment is not reversed, and the safety is ensured.
Hardware circuit implementation mode: the positive and negative power supplies are converted from the working power supply of the full-electronic board card. When the controller controls the switch driving circuit to act, the controller disconnects the relay in fig. 3, and disconnects the acquisition circuit from the driving circuit. When the driving is stopped, the control relay is connected with the acquisition circuit and the action circuit. The implementation mode of the representation acquisition circuit is as follows: the positive voltage and the negative voltage respectively pass through 2 photomos tubes and are connected to X1 through a resistor, and the positive voltage enabling or the negative voltage enabling applied to X1 is controlled by 2 independent controllers. X2 and X3 are respectively connected to the power ground through voltage dividing resistors, the collected voltage is subjected to a conversion and comparison circuit, the comparison circuit is used for judging the positive voltage, the negative voltage and the 0 voltage, the judgment value is sent to 2 independent controllers through optocouplers, and the two controllers vote. The current of the acquisition path is limited to mA level by the resistance on the path, so that the safety risk of the human body is avoided, and the on-line test can be performed.
The FPGA implementation mode comprises the following steps: outputting negative voltage at X1, and collecting voltage values on X2, X3, X4 and X5 at the moment; next, positive voltage is output on X1, and voltage values on X2, X3, X4 and X5 at the moment are collected; comparing the value collected by each state with the truth table, if the value is consistent with any state, the value is the corresponding position, and if the value is different from any state, the fault is indicated. If the line is disconnected, the line acquisition value is always 0, and if a certain line acquisition value is always 0 and the corresponding truth table is not 0, the line abnormality can be judged. The operation is circularly executed, and the position and the state of the turnout are detected in real time.
The foregoing is illustrative of the present invention and is not to be construed as limiting thereof, but rather as being included within the spirit and scope of the present invention.
Claims (8)
1. The method for detecting the position of the urban rail three-phase alternating-current five-wire system turnout is characterized by comprising the following steps of:
s1: analyzing the action principle of the five-wire turnout, determining the switch machine circuits at different positions, and adopting a direct current positive and negative voltage circuit;
s2: and (3) respectively adding comparators on X2, X3, X4 and X5 according to the output voltage on the switch circuit control X1, and judging the actual position of the switch by the acquired values of the voltages on X2, X3, X4 and X5.
2. The method for detecting the position of the urban rail three-phase alternating-current five-wire switch according to claim 1, wherein the designed voltage acquisition circuit is compatible with a conventional five-wire switch control relay circuit and can be directly upgraded without changing a circuit.
3. The method for detecting the position of a three-phase alternating-current five-wire switch of a urban rail according to claim 1, wherein the switch machine circuit uses no alternating current and the direct current positive and negative voltages are converted by a direct current power supply operated by a full electronic system.
4. The method for detecting the position of a three-phase ac five-wire switch in urban rail according to claim 1, wherein the switch circuit comprises: the circuit characteristics at the locate, flip and neutral positions are shown to represent the orientation and position of the diode.
5. The method for detecting the position of a three-phase ac five-wire switch in a urban rail according to claim 1, wherein controlling the output voltage on X1 comprises: after the switch machine is in place, the driving circuit is cut off, the indicating relay is connected, and the switch machine cable is connected into the voltage acquisition circuit.
6. The method for detecting the position of a three-phase alternating current five-wire switch in a urban rail according to claim 5, wherein the voltage acquisition circuit is designed and comprises: according to the circuit principle, a diode is arranged on an X2 line during positioning, a diode is arranged on an X3 line during inversion, and the voltage acquisition circuits on X2 and X3 are designed to be 3 comparators, so that the voltage acquisition circuits are respectively judged to be more than 0V, less than 0V and the absolute value is more than 0V; the voltage acquisition circuits on X4 and X5 are 1 comparator, and are judged to be larger than 0V.
7. The method for detecting the position of a three-phase ac five-wire switch in a urban rail according to claim 6, wherein the step of determining the position of the switch based on the collected values comprises: according to the principle, a truth table is listed, the FPGA of two different power domains respectively acquire voltage values on X2, X3, X4 and X5, switch positions and line on-off states are respectively judged according to the voltage values, and the two FPGA of the switch position judgment values perform interactive voting, so that the safety of switch position judgment is ensured.
8. The utility model provides a city rail three-phase exchange five-wire system switch position detection's device which characterized in that includes: a processor coupled to the memory; the memory is for storing computer instructions which, when executed by the processor, cause the apparatus to perform the method of any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311627628.XA CN117734769A (en) | 2023-11-30 | 2023-11-30 | Urban rail three-phase alternating-current five-wire system turnout position detection method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311627628.XA CN117734769A (en) | 2023-11-30 | 2023-11-30 | Urban rail three-phase alternating-current five-wire system turnout position detection method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117734769A true CN117734769A (en) | 2024-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311627628.XA Pending CN117734769A (en) | 2023-11-30 | 2023-11-30 | Urban rail three-phase alternating-current five-wire system turnout position detection method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117734769A (en) |
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2023
- 2023-11-30 CN CN202311627628.XA patent/CN117734769A/en active Pending
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