EP3656640B1

EP3656640B1 - Switch indication apparatus

Info

Publication number: EP3656640B1
Application number: EP19780134.3A
Authority: EP
Inventors: Hao Zhang; Xiaodong Liu; Yuanyuan LV; Yingcai ZHOU; Fusong ZHANG; Ying QI; Siran LI
Original assignee: CRSC Research and Design Institute Group Co Ltd
Current assignee: CRSC Research and Design Institute Group Co Ltd
Priority date: 2018-09-28
Filing date: 2019-09-04
Publication date: 2022-03-09
Anticipated expiration: 2039-09-04
Also published as: EA202091839A1; CN109278801B; CN109278801A; EP3656640A4; EP3656640A1; RS63169B1; WO2020063279A1

Description

TECHNICAL FIELD

The present invention relates to the technical field of rail transit and, in particular, to a turnout indication apparatus.

BACKGROUND

In a computer interlocking system currently in use, a computer performs interlocking operations, and the driving and indication is completed by a gravitation-type relay circuit performs driving and indication in a driving execution layer. A large number of gravitation-type relays are used in the system. As shown in FIG 1, an AC turnout control system in the existing art includes a large number of components, e.g., circuit breakers RD, open-phase protectors DBQ, relays DQJ, and has an extremely complex structure. In manufacture, the large number of electric device lead to extremely complex wiring and a large number of welding spots. In actual arrangement, the complex structure requires a large area. In use, the control flow and the current flow directions are complex. In case of a failure, the tracing and locating of the fault is a complex process, and the system requires regular maintenance.
As shown in FIG 1, a turnout action circuit has following current flow directions:

1) turnout action power source A → circuit breaker RD1 → open-phase protector DBQ-S_11-21 → start relay 1DQJ_12-11 → coil W of point machine motor;
2) turnout action power source B → circuit breaker RD2 → open-phase protector DBQ-S_31-41 → start relay 1DQJF_12-11 → start relay 2DQJ_111-112 → point machine connection point 43-44 → off switch K → coil U of point machine motor;
3) turnout action power source C→ circuit breaker RD3 → open-phase protector DBQ-S_51-61 → 1DQJF_22-21 → 2DQJ_121-122 → point machine connection point 41-42 → coil V of point machine motor;
4) the point machine motor has a phase sequence of W-U-V, and rotates clockwise to drive a switch rail to move towards a normal position.

In a positive half-cycle of a power source, a turnout indication circuit has a following current flow direction:
terminal 3 of indication transformer BD → resistor R1 → 2DQJ_22-21 → 2DQJ_131-132 → 1DQJF_13-11 → 2DQJ_111-112 → point machine connection point 33-34 → point machine connection point 15-16 → rectifier diode Z → resistor R → point machine connection point 35-36 → coil U of point machine motor → coil W of point machine motor → 1DQJ_11-13 → terminal 4 of indication transformer BD.
In a negative half-cycle of the power source, the turnout indication circuit has a following current flow direction:
terminal 3 of indication transformer BD → resistor R1 → 1DQJ_22-21 → 2DQJ_131-132 → DBJ_4-1 → point machine connection point 11-12 → coil V of point machine motor → coil W of point machine motor → 1DQJ_11-13 → terminal 4 of indication transformer BD.
The existing turnout control system is capable of obtaining state information of the point machine. However, the high error probability increases the risk in point machine control. Further relevant technologies are also known from CN 107985339 A (BEIJING NAT RAILWAY RES & DESIGN INST SIGNAL & COMMUNICATION LTD ET AL) 4 MAY 2018 (2018-05-04) which relates to capacitance inspection method for cables of alternating-current switch machine, and ZHANG ET AL: "Research on Three-phase AC Switches Control Module of Tram Signal System", MASTER THESIS, LANZHOU JIAOTONG UNIVERSITY, CN, 15 April 2016 (2016-04-15), page 1-68, XP 009518846.

SUMMARY

In terms of the preceding problems in the existing art, the present invention provides an AC turnout indication apparatus for improving reliability of the turnout control.
The above problem is solved by a turnout indication apparatus according to claim 1. Further improvements and embodiments are provided in the dependent claims.
According to the invention is provided a turnout indication apparatus including an indication electric control circuit, and an indication acquisition and control circuit.
The indication electric control circuit is connected to the indication acquisition and control circuit, and is configured to supply power for the indication acquisition and control circuit.
The indication acquisition and control circuit includes a normal position circuit, a reverse position circuit and a switch circuit, each of the normal position circuit and the reverse position circuit is connected to a point machine through the switch circuit to acquire indication information of the point machine.
Further, the indication acquisition and control circuit is capable of acquiring multi-wire system point machine indication information.
The normal position circuit is connected to the switch circuit, and is capable of being connected to an indication diode of the point machine when the point machine is in a normal position.
The reverse position circuit is connected to the switch circuit, and is capable of being connected to the indication diode of the point machine when the point machine is in a reverse position.
According to the invention, the indication electric control circuit is a transformer circuit, the transformer circuit includes a primary coil, a first secondary coil and a second secondary coil.
According to the invention, the normal position circuit includes a normal position acquisition circuit and a normal position acquisition self-check circuit, the reverse position circuit includes a reverse position acquisition circuit and a reverse position acquisition self-check circuit.
The switch circuit is provided with multiple switch branches, a first switch branch of the multiple switch branches is connected to a first end of the first secondary coil, a second switch branch of the multiple switch branches is connected to a second end of the first secondary coil through the normal position acquisition circuit; a third switch branch of the multiple switch branches is connected to a first end of the second secondary coil, and a fourth switch branch of the plurality of switch branches is connected to a second end of the second secondary coil through the reverse position acquisition circuit.
According to the invention, the normal position circuit further includes the normal position acquisition self-check circuit, the normal position acquisition self-check circuit is connected between the first switch branch and the second switch branch and is configured to determine whether the normal position circuit works normally.
According to the invention, the reverse position circuit further includes the reverse position acquisition self-check circuit, the reverse position acquisition self-check circuit is connected between the third switch branch and the fourth switch branch and is configured to determine whether the reverse position circuit works normally.
Further, the switch circuit includes a switch component, a control component and an acquisition component.
The control component is configured to control on and off of each switch branch in the switch component.
The acquisition component configured to acquire an on-off state of the each switch branch in the switch component.
Further, an AC turnout module is capable of sending an alternating sinusoidal signal to the outdoor point machine through the normal position circuit and the reverse position circuit separately; in a case where the AC turnout module controls a five-wire system point machine, when the normal position acquisition circuit acquires a negative half-cycle current of the sinusoidal signal and the reverse position acquisition circuit acquires a sinusoidal current, the point machine is determined to be in a normal position state; when the reverse position acquisition circuit acquires a positive half-cycle current of the sinusoidal signal, and the normal position acquisition circuit acquires the sinusoidal current, the point machine is determined to be in a reserve position state; otherwise, the point machine is determined to be in a four-open state.
Further, in a case where the AC turnout module controls a seven-wire system point machine, when the normal position acquisition circuit acquires a positive half-cycle current of the sinusoidal signal, and the reverse position acquisition circuit acquires no current, the point machine is determined to be in a normal position state; when the reverse position acquisition circuit acquires the positive half-cycle current of the sinusoidal signal, and the normal position acquisition circuit acquires no current, the point machine is determined to be in a reverse position state; otherwise, the point machine is determined to be in a four-open state.
Further, when the normal position acquisition self-check circuit is capable of acquiring a positive half-cycle signal and a negative half-cycle signal of the sinusoidal signal at the same time, the normal position acquisition circuit is determined to work normally; otherwise, the normal position acquisition circuit is determined to be in failure.
When the reverse position acquisition self-check circuit is capable of the positive half-cycle signal and the negative half-cycle signal of the sinusoidal signal at the same time, the reverse positon acquisition circuit is determined to work normally, otherwise, the reverse positon acquisition circuit is determined to be in failure.
Further, the indication information includes normal position information, reverse position information or four-open information.
Through the technical solution of the present invention, reliability of turnout control can be effectively improved, and operation safety of the railway vehicle is ensured. Additional features and advantages of the preset invention will be set forth in the description which follows, and in part will be apparent from the description, or may be understood by implementing the present invention. The objects and other advantages of the present invention may be implemented and obtained through structures set forth in the description, claims and drawings.

BRIEF DESCRIPTION OF DRAWINGS

To illustrate the technical solutions in the embodiments of the present invention or the technical solutions in the existing art more clearly, drawings used in the description of the embodiments or the existing art will be briefly described below. Apparently, the drawings described below illustrate part of the embodiments of the present invention, and those skilled in the art may obtain other drawings based on the drawings described below without creative work.

FIG. 1 is a schematic diagram of an AC turnout control system in the existing art;
FIG. 2 is a block diagram of an AC turnout module according to an embodiment of the present invention;
FIG. 3 is a block diagram of a logic part in an AC turnout according to an embodiment of the present invention;
FIG. 4 is a block diagram of a drive part in an AC turnout according to an embodiment of the present invention;
FIG. 5 is a block diagram of an indication part in an AC turnout according to an embodiment of the present invention; and
FIG. 6 is a double hot standby AC turnout system according to an embodiment of the present invention.

DETAILED DESCRIPTION

To illustrate the objects, technical solutions and advantages of embodiments of the present invention more clearly, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with drawings in the embodiments of the present invention. Apparently, the described embodiments are part, not all, of embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of the present invention.
FIG. 2 is a block diagram of an AC turnout module according to an embodiment of the present invention. As shown in FIG. 2, the AC turnout module in the embodiment of the present invention adopts a double 2-out-of-2 structural design, including two point machine control parts and a logic part. Each point machine control part includes a drive part and an indication part. An upper point machine control part and a down point machine control part, each including the drive part and the indication part, is in data connection with a safety processing module in the logic module. The two point machine control parts have the same principles but are physically independent.
In the embodiment of the present invention, the AC turnout module mainly includes a drive part, an indication part and a logic part. The drive part and the indication part are independent of each other. In the embodiment of the present invention, the logic part, the drive part, and the indication part are respectively introduced below.

Logic part:

The logic part implements data interaction with a control network and a maintenance network to implement functions of communication interaction, output control, acquisition and safety operation. The logic part is composed of a 2-out-of-2 main control unit, and cooperates with another logic unit to form a double 2-out-of-2 structure. FIG. 3 is a schematic diagram of a logic part with a double 2-out-of-2 structure according to an embodiment of the present invention. As shown in FIG. 3, two safety processing modules are provided in the logic part: a safety processing module I and a safety processing module II. Each of the two safety processing modules adopts two safety CPU chips: a safety CPU chip 1 and a safety CPU chip 2. In the safety processing module I, the safety CPU chip 1 implements data connection with the safety CPU chip 2, and the safety CPU chip 1 and the safety CPU chip 2 are respectively connected to a control network A and a maintenance network A. The structure of the safety processing module II is the same with that of the safety processing module I, and each safety CPU chip in the safety processing module I and the safety processing module II implements data interconnection.

Drive part:

As shown in FIG. 2, the drive part is powered by a three-phase alternating current (AC 380V) and is connected to an internal motor of the point machine. In use, the drive part may control the point machine to operate a fixed rotation or a reverse rotation based on a control instruction of the safety CPU chips in the logic part. The drive part mainly includes a three-phase power source switch circuit, a three-phase current isolation acquisition circuit, a three-phase electronic switch circuit and a commutation and wire system conversion circuit. FIG. 4 shows a further structural diagram of a logic part according to an embodiment of the present invention.
As shown in FIG. 4, the three-phase power source switch circuit includes a safety relay, a safety AND gate and a safety acquisition unit which are respectively connected to the safety relay. The safety AND gate in the three-phase power source switch circuit controls the safety relay in the three-phase power source switch circuit to implement the on-off control of the three-phase current. The safety AND gate receives dynamic signals at different frequencies sent by the safety CPU chips in the safety processing module to implement the on-off control of the safety relay.
In the embodiment of the present invention, the safety relay may adopt a switch tube device such as a 3-on-1-off small-scale safety relay. The three-phase electricity of AC 380V is respectively accessed through three normal-open contacts of the 3-on-1-off safety relay. The three normal-open contacts of the 3-on-1-off safety relay are closed when the point machine acts. When a fault occurs, the driving to the relay is ensured to be disconnected. The two safety CPU chips in the logic part is capable of sending dynamic control signals at different frequencies to the safety gate to implement the on-off control of the safety relay and ensure the cut-off of the AC 380V power output in case of any CPU failure. The safety acquisition unit in the three-phase power source switch circuit may be implemented by a dynamic code acquisition unit, which acquires a state of normal-close contacts of the safety relay connected to the dynamic code acquisition unit to ensure safety acquisition for the state of the normal-close contacts, and sends the acquired data to the safety CPU chips in the safety processing module. The safety AND gate in the three-phase power source switch circuit, as a control component, is capable of controlling the on and off of the safety relay to implement the on-off control of the AC 380V current. For example, when a safety fault occurs, the safety AND gate controls the 3-on-1-off safety relay to act to cut off the power supply of the AC 380V power source. The safety acquisition circuit monitors the safety relay, acquires an on-off state of the normal-close contacts of the safety relay, and sends the acquired on-off state data to the logic part. Two safety processing modules in the logic part receive the on-off state data at the same time, so as to learn the current state of the safety relay.
The three-phase current isolation acquisition circuit acquires currents in all phase lines of the three-phase electricity to obtain current data (which includes data such as magnitudes and phases of the currents) of the three-phase electricity so as to determine whether each phase line is in abnormal conditions such as phase loss, powerdown or overcurrent, and sends the obtained current data to the safety CPU chips in the safety processing module I and the safety processing module II.
The outdoor AC point machine is driven by the three-phase electricity (U, V and W) of AC 380V The abnormal in any phase causes a failure in normally driving the point machine (a case where a motor or a circuit inside the board is burnout may even occur at the time of overcurrent). Therefore, an independent current detection circuit is designed for each phase in the embodiment of the present invention (e.g., a three-phase current isolation acquisition module shown FIG. 4) and is configured to determine whether this phase line has phase loss, powerdown or overcurrent. Once the abnormal is detected, the three-phase electricity of 380V output is stopped (i.e., the switch of the three-phase power resource is turned off), and an alarm instruction is sent to the safety CPU chips to control the drive part to guide into a safety side. The three-phase electronic switch circuit includes three independent electronic switches for performing the on-off control on the three-phase electricity. Exemplarily, three independent solid-state relays may be used to control the on and off of the three-phase electricity in parallel separately. The three-phase electronic switch circuit is beneficial for improving the reliability and lifetime of the contacts of the safety relays before and after the three-phase electronic switch circuit. When an output is required to drive the point machine to rotate, the three-phase electronic switch circuit is finally closed or opened, so that the safety relays before and after the three-phase electronic switch circuit are turned on and off with no electricity.
As shown in FIG. 4, in the embodiment of the present invention, three electronic switches are provided on the lines of the three-phase electricity respectively. The three-phase electronic switch circuit further includes an electronic switch control part which implements a data connection with the safety CPU chips in the safety processing module. The safety CPU chips are capable of sending the control instruction to the electronic switch control part. The electric switch control part controls the on and off of the electronic switches after receiving the control instruction, thereby controlling the on and off of the three-phase electricity.
The commutation and wire conversion circuit includes one or more switch circuits. The switch circuit includes a safety relay, a safety AND gate and a safety acquisition unit which are respectively connected to the safety relay. As shown in FIG. 4, the commutation and wire conversion circuit takes use of two switch circuits to implement not only conversion from three phase lines to five wires, but also commutation. The two switch circuits are respectively connected to two phase lines, thereby converting two phases of the three-phase electricity into four wires, and finally converting the drive circuit into a five-wire system. The safety acquisition unit in each switch circuit acquires state data of the normal-open contacts and the normal-close contacts in the safety relay. The state data includes the on-off state of the normal-open contacts and the normal-close contacts or a state of whether adhesion occurs. Through the acquisition of the state of the normal-open contacts and the normal-close contacts, and the comparison between the state and a current relay control signal, the state of the relay contacts is determined. At the same time, the acquired state data is sent to the safety CPU chips in the safety processing module. In the embodiment of the present invention, the state data may be sent to both of the safety CPU chip 1 and the safety CPU chip 2. The safety AND gate in the commutation and wire conversion circuit also implements the data connection with the safety CPU chips in the safety processing module, and implements the on-off control of lines based on the control instruction of the safety CPU chips. Specifically, each of the two safety CPU chips in the safety processing module may send the control signal to one or two of two safety AND gates.
The commutation and wire system conversion circuit of the drive part is connected to an internal motor of the point machine through an electromagnetic compatibility protection circuit.

Indication part:

As shown in FIG. 2, the indication part is connected to an internal shutter of the point machine. In operation, the indication part acquires indication state information of the point machine, and sends the acquired indication state information of the point machine to the safety CPU chips of the logic part. The indication part mainly includes an indication electric control circuit, and an indication acquisition and control circuit.
FIG. 5 shows a structural diagram of an indication part according to an embodiment of the present invention. The indication electric control circuit of the indication part may be implemented through a transformer. Specifically, an AC 220V voltage may be converted into two AC 48V voltages and output through a power frequency transformer, and the AC 48V voltages are output to the indication acquisition and control circuit. The indication acquisition and control circuit of the indication part includes an indication acquisition circuit, an indication acquisition self-check circuit and a safety relay. The indication acquisition and control circuit is connected to the internal motor of the point machine through the electromagnetic compatibility protection circuit. As shown in FIG. 5, the indication part in the embodiment of the present invention adopts a four-wire system. A first wire and a second wire are respectively connected to a first terminal and a second terminal of a first secondary coil of the transformer, and a third wire and a fourth wire are respectively connected to a first terminal and a second terminal of a second secondary coil of the transformer. The four wires are connected to switch branches of the safety relay separately.
The indication acquisition and control circuit is connected to the internal shutter of the point machine and may acquire the indication state information of the point machine in operation. As shown in FIG. 5, a circuit in which the first secondary coil of the transformer is located forms a first loop and a circuit in which the second secondary coil of the transformer is located forms a second loop. The first loop includes a normal position circuit, and the second loop includes a reverse position circuit.
The normal position circuit includes a normal position acquisition circuit and a normal position acquisition self-check circuit. The reverse position circuit includes a reverse position acquisition circuit and a reverse position acquisition self-check circuit. The normal position circuit and the reverse position circuit are configured to determine indication information of the turnout, i.e., obtaining state information of the turnout such as a normal position, a reverse position or a four-open position. The normal position acquisition circuit is connected to the second wire. The normal position acquisition self-check circuit is connected between the first wire and the second wire. The reverse position acquisition circuit is connected to the third wire, and the reverse position acquisition self-check circuit is connected between the third wire and the fourth wire. The normal position circuit and the reverse position circuit determine whether the turnout is in a normal position, a reverse position or a four-open state through the normal position acquisition circuit and the reverse position acquisition circuit. When the AC turnout controls a five-wire system point machine and the point machine is in a normal position, the internal shutter of the point machine connects the normal position circuit to an indication diode of the point machine, and the reverse position circuit is in a short-circuit state. The AC turnout module sends an AC sinusoidal signal to an outdoor point machine through the normal position circuit and the reverse position circuit separately. The AC sinusoidal signal of the normal position circuit returns a negative half-cycle sinusoidal current after passing through the indication diode, and the reverse position circuit returns a sinusoidal current due to the short circuit of the point machine. In this case, when the normal position acquisition circuit acquires the negative half-cycle sinusoidal current and the reverse position acquisition circuit acquires the sinusoidal current, the point machine is determined to be in a normal position state. Similar to the principle of the normal position acquisition, when the reverse position acquisition circuit acquires a positive half-cycle sinusoidal current and the normal position acquisition circuit acquires the sinusoidal current, the point machine is determined to be in a reverse position state. When other combinations or an abnormal current is acquired, the point machine is determined to be in a four-open state. When the AC turnout controls a seven-wire system point machine, and the point machine is in a normal position, the internal shutter of the point machine connects the normal position circuit to the indication diode of the point machine, and the reverse position circuit is in a short-circuit state. The AC turnout module sends the AC sinusoidal signal to the outdoor point machine through the normal position circuit and the reverse position circuit separately. The AC sinusoidal signal of the normal position circuit returns the positive half-cycle sinusoidal current after passing through the indication diode, and the reverse position circuit returns no current due to the short circuit of the point machine. In this case, when the normal position acquisition circuit acquires the positive half-cycle sinusoidal current and the reverse position acquisition circuit acquires no current, the point machine is determined to be in a normal position state. Similar to the principle of the normal position acquisition, when the reverse position acquisition circuit acquires the positive half-cycle sinusoidal current and the normal position acquisition circuit acquires no current, the point machine is determined to be in a reverse position state. When other combinations or acquiring an abnormal current is acquired, the point machine is determined to be in a four-open state. The acquisition and self-check circuits are in a working state in real time, and periodically submits the indication state information to the logic part. The normal/reverse position acquisition self-check circuit is configured to determine whether the normal/reverse position circuit works normally. When the normal/reverse position acquisition self-check circuit determines that the normal/reverse position circuit works abnormally, the turnout module guides to a safety side. That is, when it is determined to be abnormal in the indication part, the normal position acquisition self-check circuit sends an instruction to the safety CPU chips, and the safety CPU chips control the drive circuit to guide the turnout to the safety side. The normal position acquisition self-check circuit and the reverse position acquisition self-check circuit may perform self-check at a certain period to implement a periodic detection for the abnormal work of the indication part.
The normal position acquisition self-check circuit is configured to determine whether the normal position acquisition circuit works normally. Based on the control instruction sent by the safety CPU chips, the normal position acquisition self-check circuit controls conduction or disconnection of a branch in which the normal position acquisition self-check circuit is located. When the branch in which the normal position acquisition self-check circuit is located is in conduction, the branch shorts an external circuit and enters a self-check state.in a normal condition, the normal position acquisition self-check circuit acquires a valid positive half-cycle signal and a valid negative half-cycle signal at the same time; otherwise, the normal position acquisition circuit is determined to be in failure. When the branch in which the normal position acquisition self-check circuit is located is in disconnection, the branch enters a point machine indication acquisition state, and a signal acquired by the normal position acquisition circuit is a real indication of the external point machine. The work principles of the reverse position acquisition self-check circuit and the normal position acquisition self-check circuit are the same. The normal position circuit and the reverse position circuit are connected to the safety relay. Specifically, the first wire, the second wire, the third wire and the fourth wire are respectively connected to contacts of four switch branches of the safety relay to connect the normal position circuit and the reverse position circuit to the safety relay. The safety relay is controlled by a control circuit to implement the on-off control of each wire. The safety CPU chips in the safety processing module sends the control instruction to the control circuit, so that the control circuit controls the on and off of the contacts of the safety relay. An acquisition circuit is connected to the safety relay, so as to acquire the state of the normal-open contacts and the normal-close contacts in each branch of the safety relay, and determine whether each branch of the safety relay works normally (mainly determining problems of whether the coil is open or the contacts are adhered), and send the acquired state data (including the on or off state of the normal-open contacts and the normal-close contacts) to the safety CPU chips in the safety processing module. The normal position acquisition circuit is connected in parallel. A first end of the paralleled circuit is connected to the first terminal of the first secondary coil. The normal position acquisition circuit is configured to acquire the turnout indication state. The normal position acquisition self-check circuit is connected between the first wire and the second wire, and is connected to the normal position acquisition circuit. Corresponding to the normal position circuit, the reverse position acquisition circuit in the reverse position circuit is connected between the third wire and the fourth wire, and is connected to the reverse position circuit. The safety relay is connected to the internal shutter of the point machine through a rear plate protection circuit.
The normal position acquisition self-check circuit and the reverse position acquisition self-check circuit receive the control instruction of the safety CPU chips in the safety processing module. According to the control instruction, the normal position acquisition circuit and the reverse position acquisition circuit operate the acquisition and self-check to perform control.
Based on the AC turnout module described above, the present invention provides a dual-system hot standby AC turnout system. As shown in FIG. 6, the dual-system hot standby AC turnout system includes two AC turnout modules: an AC turnout module I and an AC turnout module II. Each AC turnout module includes a logic part as described above and two point machine control parts as described above.
A first point machine control part in the AC turnout module I and a first point machine control part in the AC turnout module II form a double structure to cooperatively control the point machine through the electromagnetic compatibility protection circuit and an outdoor distribution board. A second point machine control part in the AC turnout module I and a second point machine control part in the AC turnout module II also form a double structure to cooperatively control the another point machine through the electromagnetic compatibility protection circuit and the outdoor distribution board.
The safety CPU chips in the logic parts of the two AC turnout modules implements data communication through inter-system communication wires. This dual-system hot standby AC turnout system further effectively improves the safety, reliability and availability in the control of the turnout.
Although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the above-mentioned embodiments may still be modified, or part of the technical features therein may be equivalently substituted. Such modifications or substitutions do not depart from scope in nature of the technical solutions in the embodiments of the present invention.

Claims

A turnout indication apparatus, comprising: an indication electric control circuit (1a, 1b, 1c), and an indication acquisition and control circuit (2,3),
wherein the indication electric control circuit is connected to the indication acquisition and control circuit and is configured to supply power for the indication acquisition and control circuit; and the indication acquisition and control circuit comprises a normal position circuit (2), a reverse position circuit (3) and a switch circuit (4), each of the normal position circuit and the reverse position circuit are connected to a point machine through the switch circuit to acquire indication information of the point machine;

wherein the indication electric control circuit is a transformer circuit, the transformer circuit comprises a primary coil (1a), a first secondary coil (1b) and a second secondary coil (1c)

the normal position circuit comprises a normal position acquisition circuit and a normal position acquisition self-check circuit, the reverse position circuit comprises a reverse position acquisition circuit and a reverse position acquisition self-check circuit;

the switch circuit is provided with a plurality of switch branches, a first switch branch of the plurality of switch branches is connected to a first end of the first secondary coil, a second switch branch of the plurality of switch branches is connected to a second end of the first secondary coil through the normal position acquisition circuit; a third switch branch of the plurality of switch branches is connected to a first end of the second secondary coil, and a fourth switch branch of the plurality of switch branches is connected to a second end of the second secondary coil through the reverse position acquisition circuit;

wherein the normal position circuit further comprises the normal position acquisition self-check circuit, the normal position acquisition self-check circuit is connected between the first switch branch and the second switch branch and is configured to determine whether the normal position circuit is in failure;

the reverse position circuit further comprises the reverse position acquisition self-check circuit, the reverse position acquisition self-check circuit is connected between the third switch branch and the fourth switch branch and is configured to determine whether the reverse position circuit is in failure.
The turnout indication apparatus of claim 1, wherein
the indication acquisition and control circuit is capable of acquiring multi-wire system point machine indication information;

the normal position circuit is connected to the switch circuit, and is capable of being connected to an indication diode of the point machine in response to determining that the point machine is in a normal position; and

the reverse position circuit is connected to the switch circuit, and is capable of being connected to the indication diode of the point machine in response to determining that the point machine is in a reverse position.
The turnout indication apparatus of claim 1, the switch circuit comprises a switch component, a control component and an acquisition component,
wherein the control component is configured to control on and off of each switch branch in the switch component; and

the acquisition component is configured to acquire an on-off state of the each switch branch in the switch component.
The turnout indication apparatus of claim 1, wherein
the turnout indication apparatus is capable of sending an alternating sinusoidal signal to the outdoor point machine through the normal position circuit and the reverse position circuit separately;

in a case where the turnout indication apparatus controls a five-wire system point machine, in response to determining that the normal position acquisition circuit acquires a negative half-cycle current of the sinusoidal signal and the reverse position acquisition circuit acquires a sinusoidal current, the point machine is determined to be in a normal position state; in response to determining that the reverse position acquisition circuit acquires a positive half-cycle current of the sinusoidal signal, and the normal position acquisition circuit acquires the sinusoidal current, the point machine is determined to be in a reverse position state; otherwise, the point machine is determined to be in a four-open state.
The turnout indication apparatus of claim 1, wherein
the turnout indication apparatus is capable of sending an alternating sinusoidal signal to the outdoor point machine through the normal position circuit and the reverse position circuit separately;

in a case where the turnout indication apparatus controls a seven-wire system point machine, in response to determining that the normal position acquisition circuit acquires a positive half-cycle current of the sinusoidal signal, and the reverse position acquisition circuit acquires no current, the point machine is determined to be in a normal position state; in response to determining that the reverse position acquisition circuit acquires the positive half-cycle current of the sinusoidal signal, and the normal position acquisition circuit acquires no current, the point machine is determined to be in a reverse position state; otherwise, the point machine is determined to be in a four-open state.
The turnout indication apparatus of claim 4 or 5, wherein
in response to determining that the normal position acquisition self-check circuit is capable of acquiring a positive half-cycle signal and a negative half-cycle signal of the sinusoidal signal at the same time, the normal position acquisition circuit is determined to work normally; otherwise, the normal position acquisition circuit is determined to be in failure; and

in response to determining that the reverse position acquisition self-check circuit is capable of acquiring the positive half-cycle signal and the negative half-cycle signal of the sinusoidal signal at the same time, the reverse positon acquisition circuit is determined to work normally; otherwise, the reverse positon acquisition circuit is determined to be in failure.
The turnout indication apparatus of claim 1, wherein
the indication information comprises normal position information, reverse position information or four-open information.