Main and standby dual system automatic switching circuit and method for realizing main and standby dual system automatic switching

Abstract

The present application relates to an automatic switching circuit for a main and standby dual system and a method for realizing automatic switching of the main and standby dual system. Based on the implementation scheme of the present application, the present invention can realize seamless switching of the main and standby systems, and the switching time of the dual system can be adjusted according to the actual situation. The hardware of the automatic switching scheme of the main and standby dual system uses relays to form a logic circuit, without complex programmable devices, and all logics are realized by the logic circuit composed of relays. At the same time, a manual switching means is provided to ensure that the automatic switching of the main and standby dual system is successful once, reduce the number of unnecessary switching times, and improve the flexibility of the application of the integrated system. The basic method of automatic switching of the dual system designed by the present invention monitors the status of the dual system in real time and alarms for abnormalities. It has high reliability and shortens the delay of manual switching on signal equipment.

Description

Technical Field

[0001] The present disclosure relates to the field of rail transit technology, and in particular to a main-standby dual-system automatic switching circuit and a method and control system for realizing the main-standby dual-system automatic switching. Background Art

[0002] As the brain of railway transportation, the signal system ensures the safe and reliable operation of trains. In order to improve the availability and reliability of the signal system, the automatic switching function of the main and standby dual systems has become the most common method of railway signal equipment. Similarly, in some other industries with high reliability requirements, the automatic switching mode of the main and standby dual systems is also needed to improve the reliability of the product system.

[0003] The existing equipment adopting the automatic switching mode of the main and backup dual systems can automatically switch to the backup system once the main system has problems. When a problem occurs in the system, the controller can automatically switch the main system to the backup system and prompt the maintenance personnel to perform repairs. Among them, when the mode is switched, when the main system is automatically switched to the backup system, there will be a certain signal delay during the period, which causes the signal system to cause signal operation errors due to the delay.

[0004] When the current situation switching is unsuccessful, multiple scheme switching is required to switch to the best scheme for control, and the number of switching times is large.

[0005] The automatic control mode switching system requires a large number of logic circuits and programmable devices for program editing to design the program for the automatic switching mode. Therefore, its circuit structure is complex, requiring more complex programmable devices and other facilities, and the system is complex.

[0006] In addition, in order to improve automation as much as possible, the existing equipment that adopts the main and standby dual-system automatic switching mode rarely configures its signal system with a manual switching system that cooperates with the automatic switching system, so the flexibility is relatively low. Summary of the invention

[0007] In order to solve the above problems, the present application proposes a main-standby dual system automatic switching circuit and a method for realizing the main-standby dual system automatic switching and a method and control system for realizing the main-standby dual system automatic switching.

[0008] In one aspect, the present application provides a main-standby dual-system automatic switching circuit, comprising: a first system;

[0009] Second system;

[0010] Power supply PWR_VCC;

[0011] A dual-system automatic switching circuit for switching between the first system and the second system;

[0012] System selection knob switch SSS, with Auto and Manual gears;

[0013] The dual-system automatic switching circuit is connected to the power supply PWR_VCC, the first system and the second system are connected in parallel in the dual-system automatic switching circuit, and are associated with the system selection knob switch SSS;

[0014] When the system selection knob switch SSS is turned to the Auto position, the first system and the second system are switched and controlled by the dual-system automatic switching circuit, presenting an automatic mode;

[0015] When the system selection knob switch SSS is turned to the manual position, the first system or the second system is started directly, and the manual mode is displayed.

[0016] As an optional embodiment of the present application, optionally, the dual-system automatic switching circuit includes:

[0017] (1) The first system control circuit includes a time relay TR1, a time relay TR2, a locking relay LR1, a system switching relay SSR1 coil and a time relay TR1 coil, and the circuit path signal flow direction is:

[0018] PWR_VCC→AUTO→TR1→TR2→LR1→SSR1 coil / TR1 coil→GND;

[0019] Among them, the normally closed contact of the time relay TR1 is closed, the normally closed contact of the time relay TR2 is closed, and the normally closed contact of the locking relay LR1 is closed;

[0020] (2) The first system startup circuit includes a system switching relay SSR1, and the circuit path signal flow direction is:

[0021] PWR_VCC→SSR1→first system→GND;

[0022] Among them, the normally open contact of the system switching relay SSR1 is disconnected;

[0023] (3) The first system start-up holding circuit includes the system switching relay SSR2, the system switching relay SSR1 coil and the time relay TR1 coil, and the circuit path signal flow direction is:

[0024] PWR_VCC→AUTO→SSR2→SSR1 coil / TR1 coil→GND;

[0025] Among them, the normally closed contact of the system switching relay SSR2 is closed;

[0026] (4) The first system switches to the second system circuit, including the system feedback relay SFR1, the time relay TR1, the locking relay LR2, the system switching relay SSR2 coil and the time relay TR2 coil, and the circuit path signal flow direction is:

[0027] PWR_VCC→SFR1→TR1→LR2→SSR2 coil / TR2 coil→GND;

[0028] Among them, the normally closed contact of the system feedback relay SFR1 is closed, the normally open contact of the time relay TR1 is opened, and the normally open contact of the locking relay LR2 is opened;

[0029] (5) The driver D1 controlled by the first system is electrically connected to the system feedback relay SFR1.

[0030] As an optional implementation scheme of the present application, optionally, the dual-system automatic switching circuit further includes:

[0031] The LR1 activation circuit includes the system switching relay SSR2, the time relay TR1 and the time relay TR1 coil, and the circuit path signal flow direction is:

[0032] PWR_VCC→AUTO→SSR2→TR1→LR1 coil→GND;

[0033] Among them, the normally closed contact of the system switching relay SSR2 is closed, and the normally open contact of the time relay TR1 is opened;

[0034] When the first system fails to start successfully, the LR1 activation circuit is used to switch the first system to the second system circuit activation, and the system automatically switches to the second system.

[0035] As an optional embodiment of the present application, optionally, the dual-system automatic switching circuit includes:

[0036] (1) The second system control circuit includes a time relay TR1, a time relay TR2, a locking relay LR2, a system switching relay SSR2 coil and a time relay TR2 coil, and the circuit path signal flow direction is:

[0037] PWR_VCC→AUTO→TR1→TR2→LR2→SSR2 coil / TR2 coil→GND;

[0038] Among them, the normally closed contact of the time relay TR1 is closed, the normally closed contact of the time relay TR2 is closed, and the normally open contact of the locking relay LR2 is opened;

[0039] (2) The second system starting circuit includes a system switching relay SSR2, and the circuit path signal flow direction is:

[0040] PWR_VCC→SSR2→Second system→GND;

[0041] Among them, the normally open contact of the system switching relay SSR2 is disconnected;

[0042] (3) The second system start-up holding circuit includes the system switching relay SSR1, the system switching relay SSR2 coil and the time relay TR2 coil, and the circuit path signal flow direction is:

[0043] PWR_VCC→AUTO→SSR1→SSR2 coil / TR2 coil→GND;

[0044] Among them, the normally closed contact of the system switching relay SSR1 is closed;

[0045] (4) The second system switches to the first system circuit, including the system feedback relay SFR2, the time relay TR2, the locking relay LR1, the system switching relay SSR1 coil and the time relay TR1 coil, and the circuit path signal flow direction is:

[0046] PWR_VCC→SFR2→TR2→LR1→SSR1 coil / TR1 coil→GND;

[0047] Among them, the normally closed contact of the system feedback relay SFR2 is closed, the normally open contact of the time relay TR2 is opened, and the normally closed contact of the locking relay LR1 is closed;

[0048] (5) The driver D2 controlled by the second system is electrically connected to the system feedback relay SFR2.

[0049] As an optional embodiment of the present application, optionally, the dual-system automatic switching circuit further includes:

[0050] The LR2 activation circuit includes the system switching relay SSR1, the time relay TR2 and the time relay TR2 coil, and the circuit path signal flow direction is:

[0051] PWR_VCC→AUTO→SSR1→TR2→LR2 coil→GND;

[0052] Among them, the normally closed contact of the system switching relay SSR1 is closed, and the normally open contact of the time relay TR2 is opened;

[0053] When the second system fails to start, the LR2 activation circuit is used to switch the second system to the first system circuit activation, and the system attempts to switch to the first system.

[0054] On the other hand, the present application proposes a method for realizing automatic switching of a primary and a standby dual system, the method being implemented based on the primary and standby dual system automatic switching circuit, comprising the following steps:

[0055] Turn the system selection knob switch SSS to the Auto position, and the first system and the second system will be automatically switched through the dual-system automatic switching circuit;

[0056] The switching between the primary and backup systems is automatic. When the first system starts, the second system is ready to start at any time. Once the first system fails to start, the second system starts immediately. When the second system starts, the first system is ready to start at any time. Once the second system fails to start, the first system starts immediately.

[0057] As an optional implementation scheme of the present application, optionally, the system selection knob switch SSS is turned to the Auto position, and the first system and the second system are automatically switched through the dual-system automatic switching circuit, including:

[0058] The system selection knob switch SSS is turned to the Auto position, and the coil of the time relay TR1 and the coil of the system switching relay SSR1 are energized through the first system control circuit; when the coil of the system switching relay SSR1 is energized, then:

[0059] The normally closed contact of SSR1 is disconnected, cutting off the startup and holding circuit of the second system;

[0060] The normally open contact of SSR1 is closed, the first system start circuit is energized, and the first system starts to start;

[0061] If the first system starts successfully, the first system sends a high level through the driver D1 to activate the system feedback relay SFR1, and the normally closed contact of SFR1 is disconnected, so that the first system switches to the second system circuit and disconnects, avoiding the simultaneous startup of the first system;

[0062] If the first system fails to start successfully and the system feedback relay SFR1 cannot be energized and activated, then after the delay time of the time relay TR1 expires, the normally open contact of TR1 closes, and the coil of the locking relay LR1 is energized through the LR1 activation circuit;

[0063] After the coil of the locking relay LR1 is energized, the normally open contact of LR2 is closed, and the circuit switching from the first system to the second system is activated, preparing to try to switch to the second system.

[0064] As an optional implementation scheme of the present application, optionally, the system selection knob switch SSS is turned to the Auto position, and the first system and the second system are automatically switched through the dual-system automatic switching circuit, including:

[0065] When the first system switches to the second system circuit and is activated, the coil of the time relay TR2 and the coil of the system switching relay SSR2 are energized through the second system control circuit, then:

[0066] The normally closed contact of the system switching relay SSR2 is disconnected, and the first system starts to keep the circuit de-energized, so that the coil of the system switching relay SSR1 and the coil of the time relay TR1 are de-energized, thereby de-energizing the first system;

[0067] The system switching relay SSR1 is de-energized, the normally closed contact of the system switching relay SSR1 energizes the second system startup holding circuit, and the coil of the system switching relay SSR2 and the coil of the time relay TR2 are activated;

[0068] The normally open contact of the system switching relay SSR2 is closed, the second system starting circuit is energized, and the second system is started;

[0069] If the second system starts successfully, the second system sends a high level through the driver D2 to activate the coil of the system feedback relay SFR2, and the normally closed contact of the system feedback relay SFR2 is disconnected, disconnecting the second system and switching to the first system circuit to avoid the first system starting at the same time;

[0070] If the second system fails to start successfully and the system feedback relay SFR2 cannot be activated, then after the delay time of the time relay TR2 expires, the normally open contact of TR2 closes, and the locking relay LR2 is energized through the LR2 activation circuit; after the LR2 coil is activated, the normally open contact of LR1 closes, and the second system switches to the first system circuit activation, and the system retries to activate the first system.

[0071] As an optional implementation scheme of the present application, optionally, the system selection knob switch SSS is turned to the Auto position, and the first system and the second system are automatically switched through the dual-system automatic switching circuit, and further comprising:

[0072] Turning the system selection knob switch SSS to the manual position directly starts the first system or the second system and enters the manual mode.

[0073] On the other hand, the present application also proposes a control system, comprising:

[0074] processor;

[0075] a memory for storing processor-executable instructions;

[0076] Wherein, the processor is configured to implement the method for realizing automatic switching of the active and standby dual systems when executing the executable instructions.

[0077] Technical effects of the present invention:

[0078] Based on the implementation scheme of the present application, the present invention can realize seamless switching of the main and standby systems, and the switching time of the two systems can be adjusted according to the actual situation. The hardware of the automatic switching solution of the main and standby dual systems uses relays to form a logic circuit, without complex programmable devices, and all logics are implemented by the logic circuit composed of relays. At the same time, a manual switching means is provided to ensure that the automatic switching of the main and standby dual systems is successful once, reduce the number of unnecessary switching times, and improve the flexibility of the application of the integrated system. The basic method of automatic switching of the dual systems designed by the present invention monitors the status of the dual systems in real time and alarms for abnormalities. It has high reliability and shortens the delay of manual switching on signal equipment.

[0079] The dual-system automatic switching achieved by the present invention ensures real-time monitoring of the status of redundant system signal equipment. It has high reliability and greatly shortens the time spent by signal equipment in the switching process. It has flexible configurability and strong scalability, and is highly compatible with the power supply interfaces of various redundant systems. It can be widely used in the subsequent development of new projects or the upgrading and transformation of old projects. All cables can be built into the integrated box, which has a small overall size and is easy and reliable to install, which is conducive to market promotion. Through the dual-system automatic switching design, the control of the signal system is more intelligent and integrated, which greatly improves the train operation efficiency. The design uses relays to build a logic circuit, so that the system has stable automatic switching performance and higher reliability.

[0080] Further features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0081] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the disclosure and, together with the description, serve to explain the principles of the disclosure.

[0082] Figure 1 The topological structure diagram of the main and standby dual system automatic switching circuit of the present invention is shown;

[0083] Figure 2 It is a schematic diagram showing the circuit path signal flow of the control circuit of system 1 in the topological structure of the present invention. DETAILED DESCRIPTION

[0084] Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0085] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0086] In addition, in order to better illustrate the present disclosure, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present disclosure can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present disclosure.

[0087] In order to describe the technical principle in conjunction with the accompanying drawings, the following Figure 1 The first system in the description is System 1, and the second system is described as System 2.

[0088] The terms for the facilities in the attached figure are explained as follows:

[0089] 1. SSS: System Selection Switch

[0090] The selector switch has three positions: left, middle and right. The leftmost end of the knob is for manually selecting system 1 as the main system working mode, and the rightmost end of the knob is for manually selecting system 2 as the main system working mode. When the knob is in the middle position, it is the Auto automatic switching mode. The main system working system switches between system 1 and system 2 according to the working health of the two systems, as described below in this patent.

[0091] 2. SSR: Switch System Relay

[0092] Taking the system switching relay SSR1 as an example, when the system switching relay SSR1 coil is energized, the normally closed contact of SSR1 is disconnected, cutting off the start-up holding circuit of system 2. When the system switching relay SSR1 coil is energized, the normally open contact of SSR1 is closed, the start-up circuit of system 1 is energized, and system 1 starts to start.

[0093] Similarly, when the system switching relay SSR2 coil is energized, the normally closed contact of SSR2 is disconnected, cutting off the start-up holding circuit of system 1. When the system switching relay SSR2 coil is energized, the normally open contact of SSR2 is closed, the start-up circuit of system 2 is energized, and system 1 starts to start.

[0094] 3. TR: Timer Relay

[0095] This relay is an activation delay relay. After the relay coil is activated, it takes a delay period before the contacts will act. The delay time can be manually set through the relay body. The delay time is set to be slightly longer than the system automatic start time.

[0096] 4. LR: Locking Relay

[0097] The two-winding coil latching relay has two opposite coils, namely LR1 and LR2. When the two coils are energized, the contact movement direction is opposite. When the LR1 coil is energized, the contact of LR1 is opened and the contact of LR2 is closed. After the LR1 coil is de-energized, the contact remains in the previous state. Only when the coil LR2 is energized, the contact of LR2 is opened and the contact of LR1 is closed.

[0098] LR1:

[0099] The left coil of the locking relay (see attached Figure 1 )

[0100] LR2:

[0101] The right coil of the locking relay (see attached Figure 1 )

[0102] 5. SFR: System Feedback Relay

[0103] If system 1 is successfully started, driver D1 controlled by system 1 will activate SFR1. If system 1 is not successfully started, SFR1 will not be activated.

[0104] Similarly, if the system 2 is successfully started, the driver D2 controlled by the system 2 will activate SFR2. If the system 2 is not successfully started, SFR2 will not be activated.

[0105] Attached Figure 1 In the topology, different circuits are included. Different electronic facilities have different application states, and the states of their normally open contacts and normally closed contacts are different. Therefore, their functions are different in different circuits. The bottom coil corresponds to the system switching relay, time relay or latching relay in each circuit that is compatible with the coil.

[0106] This topology includes the following circuits for switching between system 1 and system 2, and the circuit path signal flows in various states are as follows:

[0107] (1) System 1 control circuit, the signal flow of its circuit path is:

[0108] PWR_VCC→AUTO→TR1→TR2→LR1→SSR1 coil / TR1 coil→GND;

[0109] (2) System 1 starts the holding circuit, and the signal flow of its circuit path is:

[0110] PWR_VCC→AUTO→SSR2→SSR1 coil / TR1 coil→GND;

[0111] (3) System 1 starts the circuit, and the signal flow of the circuit path is:

[0112] PWR_VCC→SSR1→System 1→GND;

[0113] (4) System 1 switches to system 2 circuit, and the signal flow of the circuit path is:

[0114] PWR_VCC→SFR1→TR1→LR2→SSR2 coil / TR2 coil→GND;

[0115] (5) System 2 control circuit, the signal flow of its circuit path is:

[0116] PWR_VCC→AUTO→TR1→TR2→LR2→SSR2 coil / TR2 coil→GND;

[0117] (6) System 2 starts the holding circuit, and the signal flow of its circuit path is:

[0118] PWR_VCC→AUTO→SSR1→SSR2 coil / TR2 coil→GND;

[0119] (7) System 2 starts the circuit, and the signal flow of its circuit path is:

[0120] PWR_VCC→SSR2→System 2→GND;

[0121] (8) System 2 switches to the system 1 circuit, and the signal flow of the circuit path is:

[0122] PWR_VCC→SFR2→TR2→LR1→SSR1 coil / TR1 coil→GND;

[0123] (9) LR1 activation circuit, the signal flow of its circuit path is:

[0124] PWR_VCC→AUTO→SSR2→TR1→LR1 coil→GND;

[0125] (10) LR2 activation circuit, the circuit path signal flow direction is:

[0126] PWR_VCC→AUTO→SSR1→TR2→LR2 coil→GND.

[0127] The connection relationship of the electronic components of each circuit can be specifically Figure 1 The circuit is described below. Figure 2 As shown, taking the system 1 control circuit as an example, the signal flow of the circuit path passes through PWR_VCC→AUTO→TR1→TR2→LR1→SSR1 coil / TR1 coil→GND in sequence.

[0128] Example 1

[0129] In one aspect, the present application provides a main-standby dual-system automatic switching circuit, comprising: a system 1;

[0130] System 2;

[0131] Power supply PWR_VCC;

[0132] Dual system automatic switching circuit, used for switching between system 1 and system 2;

[0133] System selection knob switch SSS, with Auto and Manual gears;

[0134] The dual-system automatic switching circuit is connected to the power supply PWR_VCC, and the system 1 and the system 2 are connected in parallel in the dual-system automatic switching circuit and are associated with the system selection knob switch SSS;

[0135] When the system selection knob switch SSS is turned to the Auto position, system 1 and system 2 are switched and controlled by the dual-system automatic switching circuit, presenting an automatic mode;

[0136] When the system selection knob switch SSS is turned to the manual position, system 1 or system 2 is started directly, presenting the manual mode.

[0137] like Figure 1 The topological structure diagram of the main and standby dual system automatic switching circuit is shown in FIG. System 1 and system 2 are connected in parallel in the topological structure and controlled by a system selection knob switch SSS.

[0138] There are two control methods for System 1 and System 2:

[0139] The first one is that the system selection knob switch SSS is turned to Auto, and the main and standby systems switch to automatic mode. When system 1 is started, system 2 is ready to start at any time. Once system 1 fails to start, system 2 starts immediately. When system 2 is started, system 1 is ready to start at any time. Once system 2 fails to start, system 1 starts immediately.

[0140] The second method is to turn the system selection knob switch SSS to the far left or far right, and you can directly start system 1 or system 2 by adjusting the SSS switch. When the knob is turned to the far left, the manual selection system 1 works as the main system. When the knob is turned to the far right, the manual selection system 2 works as the main system.

[0141] As an optional embodiment of the present application, optionally, the dual-system automatic switching circuit includes:

[0142] (1) System 1 control circuit includes time relay TR1, time relay TR2, locking relay LR1, system switching relay SSR1 coil and time relay TR1 coil. The signal flow direction of the circuit path is:

[0143] PWR_VCC→AUTO→TR1→TR2→LR1→SSR1 coil / TR1 coil→GND;

[0144] Among them, the normally closed contact of the time relay TR1 is closed, the normally closed contact of the time relay TR2 is closed, and the normally closed contact of the locking relay LR1 is closed;

[0145] (2) System 1 starting circuit, including system switching relay SSR1, whose circuit path signal flow direction is:

[0146] PWR_VCC→SSR1→System 1→GND;

[0147] Among them, the normally open contact of the system switching relay SSR1 is disconnected;

[0148] (3) System 1 starts the holding circuit, including the system switching relay SSR2, the system switching relay SSR1 coil and the time relay TR1 coil. The signal flow direction of the circuit path is:

[0149] PWR_VCC→AUTO→SSR2→SSR1 coil / TR1 coil→GND;

[0150] Among them, the normally closed contact of the system switching relay SSR2 is closed;

[0151] (4) System 1 switches to system 2 circuit, including system feedback relay SFR1, time relay TR1, locking relay LR2, system switching relay SSR2 coil and time relay TR2 coil. The circuit path signal flow direction is:

[0152] PWR_VCC→SFR1→TR1→LR2→SSR2 coil / TR2 coil→GND;

[0153] Among them, the normally closed contact of the system feedback relay SFR1 is closed, the normally open contact of the time relay TR1 is opened, and the normally open contact of the locking relay LR2 is opened;

[0154] (5) Driver D1 controlled by system 1 is electrically connected to system feedback relay SFR1.

[0155] As an optional embodiment of the present application, optionally, the dual-system automatic switching circuit further includes:

[0156] The LR1 activation circuit includes the system switching relay SSR2, the time relay TR1 and the time relay TR1 coil, and the circuit path signal flow direction is:

[0157] PWR_VCC→AUTO→SSR2→TR1→LR1 coil→GND;

[0158] Among them, the normally closed contact of the system switching relay SSR2 is closed, and the normally open contact of the time relay TR1 is opened;

[0159] When system 1 fails to start successfully, the LR1 activation circuit is used to switch system 1 to system 2 circuit activation, and the system automatically switches to system 2.

[0160] As an optional embodiment of the present application, optionally, the dual-system automatic switching circuit includes:

[0161] (1) System 2 control circuit includes time relay TR1, time relay TR2, locking relay LR2, system switching relay SSR2 coil and time relay TR2 coil. The signal flow direction of the circuit path is:

[0162] PWR_VCC→AUTO→TR1→TR2→LR2→SSR2 coil / TR2 coil→GND;

[0163] Among them, the normally closed contact of the time relay TR1 is closed, the normally closed contact of the time relay TR2 is closed, and the normally open contact of the locking relay LR2 is opened;

[0164] (2) System 2 starting circuit, including system switching relay SSR2, whose circuit path signal flow direction is:

[0165] PWR_VCC→SSR2→System 2→GND;

[0166] Among them, the normally open contact of the system switching relay SSR2 is disconnected;

[0167] (3) System 2 starts the holding circuit, including the system switching relay SSR1, the system switching relay SSR2 coil and the time relay TR2 coil. The signal flow direction of the circuit path is:

[0168] PWR_VCC→AUTO→SSR1→SSR2 coil / TR2 coil→GND;

[0169] Among them, the normally closed contact of the system switching relay SSR1 is closed;

[0170] (4) System 2 switches to the system 1 circuit, including the system feedback relay SFR2, the time relay TR2, the locking relay LR1, the system switching relay SSR1 coil and the time relay TR1 coil. The circuit path signal flow direction is:

[0171] PWR_VCC→SFR2→TR2→LR1→SSR1 coil / TR1 coil→GND;

[0172] Among them, the normally closed contact of the system feedback relay SFR2 is closed, the normally open contact of the time relay TR2 is opened, and the normally closed contact of the locking relay LR1 is closed;

[0173] (5) Driver D2 controlled by system 2 is electrically connected to system feedback relay SFR2.

[0174] As an optional embodiment of the present application, optionally, the dual-system automatic switching circuit further includes the following associated with system 2:

[0175] The LR2 activation circuit includes the system switching relay SSR1, the time relay TR2 and the time relay TR2 coil, and the circuit path signal flow direction is:

[0176] PWR_VCC→AUTO→SSR1→TR2→LR2 coil→GND;

[0177] Among them, the normally closed contact of the system switching relay SSR1 is closed, and the normally open contact of the time relay TR2 is opened;

[0178] When system 2 fails to start successfully, the LR2 activation circuit is used to switch system 2 to system 1 circuit activation, and the system attempts to switch to system 1.

[0179] Based on the implementation principle of Example 1, on the other hand, the present application proposes a method for realizing automatic switching of the active and standby dual systems. The method is implemented based on the active and standby dual system automatic switching circuit, and comprises the following steps:

[0180] Turn the system selection knob switch SSS to the Auto position, and system 1 and system 2 will automatically switch through the dual system automatic switching circuit;

[0181] The switching between the primary and standby systems is automatic. When system 1 is started, system 2 is ready to start at any time. Once system 1 fails to start, system 2 starts immediately. When system 2 is started, system 1 is ready to start at any time. Once system 2 fails to start, system 1 starts immediately.

[0182] The specific working principle is as follows:

[0183] 1. The system selection knob switch SSS is turned to the Auto position, and the coil of the time relay TR1 and the coil of the system switching relay SSR1 are energized through the system 1 control circuit. When the coil of the system switching relay SSR1 is energized, the normally closed contact of SSR1 is disconnected, cutting off the system 2 start-up holding circuit; the coil of the time relay TR1 is energized, but the time relay needs to delay for a certain time (according to the system start-up time setting) before the TR1 contact will act.

[0184] 2. After the coil of the system switching relay SSR1 is energized, the normally open contact of SSR1 is closed, the system 1 starting circuit is energized, and system 1 starts to start;

[0185] If system 1 starts successfully, system 1 sends a high level through driver D1 to activate system feedback relay SFR1, and then the normally closed contact of SFR1 is disconnected, so that system 1 switches to system 2 circuit and cannot be energized, preventing system 2 from starting at the same time;

[0186] If system 1 fails to start successfully and the system feedback relay SFR1 cannot be energized and activated, then after the time delay of time relay TR1 expires, the normally open contact of TR1 closes, and the coil of locking relay LR1 is energized through the LR1 activation circuit. After the coil of locking relay LR1 is energized, the normally open contact of LR2 closes, and system 1 switches to system 2 circuit activation.

[0187] 3. After the system 1 switches to the system 2 circuit and is activated, the coil of the time relay TR2 and the coil of the system switching relay SSR2 are energized through the system 2 control circuit. The normally closed contact of the system switching relay SSR2 is disconnected, and the system 1 starts to keep the circuit de-energized, de-energizing the coil of the system switching relay SSR1 and the coil of the time relay TR1, thereby de-energizing the system 1 system.

[0188] 4. The system switching relay SSR1 loses power, and the normally closed contact of the system switching relay SSR1 enables the system 2 start-up and holding circuit to be energized, and the system switching relay SSR2 coil and the time relay TR2 coil are activated; the normally open contact of the system switching relay SSR2 is closed, the system 2 start-up circuit is energized, and system 2 is started.

[0189] If system 2 starts successfully, system 2 sends a high level through driver D2 to activate the coil of system feedback relay SFR2, and the normally closed contact of system feedback relay SFR2 is disconnected, so that system 2 switches to system 1 and the circuit is disconnected, avoiding simultaneous startup of system 1;

[0190] If system 2 fails to start successfully and the system feedback relay SFR2 cannot be activated, then after the delay time of time relay TR2 expires, the normally open contact of TR2 closes, and the locking relay LR2 is energized through the LR2 activation circuit; after the LR2 coil is activated, the normally open contact of LR1 closes, and system 2 switches to system 1 circuit activation, and the system tries to activate system 1 again.

[0191] The switching between the primary and standby systems is automatic. When system 1 is started, system 2 is ready to start at any time. Once system 1 fails to start, system 2 starts immediately. When system 2 is started, system 1 is ready to start at any time. Once system 2 fails to start, system 1 starts immediately.

[0192] When the system selection knob switch SSS is moved to a position other than Auto, such as being manually adjusted to the far left, system 1 receives the gear position signal and starts to start; the same is true for system 2.

[0193] Therefore, by adopting the above method, the present invention can realize seamless switching of the main and standby systems, and the switching time of the two systems can be adjusted according to the actual situation. The hardware of the automatic switching solution of the main and standby dual systems uses relays to form a logic circuit, without complex programmable devices, and all logics are implemented by the logic circuit composed of relays. At the same time, a manual switching means is provided to ensure that the automatic switching of the main and standby dual systems is successful once, reduce the number of unnecessary switching times, and improve the flexibility of the application of the integrated system. The basic method of automatic switching of the dual systems designed by the present invention monitors the status of the dual systems in real time and alarms for abnormalities. It has high reliability and shortens the delay of manual switching on signal equipment.

[0194] The dual-system automatic switching achieved by the present invention ensures real-time monitoring of the status of redundant system signal equipment. It has high reliability and greatly shortens the time spent by signal equipment in the switching process. It has flexible configurability and strong scalability, and is highly compatible with the power supply interfaces of various redundant systems. It can be widely used in the subsequent development of new projects or the upgrading and transformation of old projects. All cables can be built into the integrated box, which has a small overall size and is easy and reliable to install, which is conducive to market promotion. Through the dual-system automatic switching design, the control of the signal system is more intelligent and integrated, which greatly improves the train operation efficiency. The design uses relays to build a logic circuit, so that the system has stable automatic switching performance and higher reliability.

[0195] Obviously, those skilled in the art should understand that all or part of the processes in the above-mentioned embodiment method can be implemented by instructing the relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned control methods. The modules or steps of the present invention can be implemented by a general-purpose computing device. They can be concentrated on a single computing device or distributed on a network composed of multiple computing devices. Optionally, they can be implemented by program codes executable by computing devices, so that they can be stored in a storage device and executed by the computing device, or they can be made into individual integrated circuit modules respectively, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. In this way, the present invention is not limited to any specific combination of hardware and software.

[0196] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment method can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned control methods. Among them, the storage medium can be a disk, an optical disk, a read-only memory (ROM), a random access memory (RAM), a flash memory (Flash Memory), a hard disk (Hard Disk Drive, abbreviated as: HDD) or a solid-state drive (SSD), etc.; the storage medium can also include a combination of the above-mentioned types of memory.

[0197] Example 2

[0198] Furthermore, in another aspect, the present application also proposes a control system, comprising:

[0199] processor;

[0200] a memory for storing processor-executable instructions;

[0201] Wherein, the processor is configured to implement the method for realizing automatic switching of the active and standby dual systems when executing the executable instructions.

[0202] The control system of the embodiment of the present disclosure includes a processor and a memory for storing processor executable instructions. The processor is configured to implement any of the above-mentioned active-standby dual-system automatic switching circuits when executing the executable instructions.

[0203] Here, it should be noted that the number of processors can be one or more. At the same time, in the control system of the embodiment of the present disclosure, an input device and an output device may also be included. Among them, the processor, memory, input device and output device may be connected through a bus or in other ways, which are not specifically limited here.

[0204] The memory, as a computer-readable storage medium, can be used to store software programs, computer executable programs and various modules, such as the program or module corresponding to the main and standby dual-system automatic switching circuit of the embodiment of the present disclosure. The processor executes various functional applications and data processing of the control system by running the software programs or modules stored in the memory.

[0205] The input device can be used to receive input numbers or signals. The signal can be a key signal related to user settings and function control of the device / terminal / server. The output device can include a display device such as a display screen.

[0206] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A main-standby dual-system automatic switching circuit, characterized in that: include: First system; Second system; Power supply PWR_VCC; A dual-system automatic switching circuit for switching between the first system and the second system; System selection knob switch SSS, with Auto and Manual gears; The dual-system automatic switching circuit is connected to the power supply PWR_VCC, the first system and the second system are connected in parallel in the dual-system automatic switching circuit, and are associated with the system selection knob switch SSS; When the system selection knob switch SSS is turned to the Auto position, the first system and the second system are switched and controlled by the dual-system automatic switching circuit, presenting an automatic mode; When the system selection knob switch SSS is turned to the manual position, the first system or the second system is directly started, presenting the manual mode; The dual-system automatic switching circuit includes: (1) The first system control circuit includes a time relay TR1, a time relay TR2, a locking relay LR1, a system switching relay SSR1 coil and a time relay TR1 coil, and the circuit path signal flow direction is: PWR_VCC→AUTO→TR1→TR2→LR1→SSR1 coil / TR1 coil→GND; Among them, the normally closed contact of the time relay TR1 is closed, the normally closed contact of the time relay TR2 is closed, and the normally closed contact of the locking relay LR1 is closed; (2) The first system startup circuit includes a system switching relay SSR1, and the circuit path signal flow direction is: PWR_VCC→SSR1→first system→GND; Among them, the normally open contact of the system switching relay SSR1 is disconnected; (3) The first system start-up holding circuit includes the system switching relay SSR2, the system switching relay SSR1 coil and the time relay TR1 coil, and the circuit path signal flow direction is: PWR_VCC→AUTO→SSR2→SSR1 coil / TR1 coil→GND; Among them, the normally closed contact of the system switching relay SSR2 is closed; (4) The first system switches to the second system circuit, including the system feedback relay SFR1, the time relay TR1, the locking relay LR2, the system switching relay SSR2 coil and the time relay TR2 coil, and the circuit path signal flow direction is: PWR_VCC→SFR1→TR1→LR2→SSR2 coil / TR2 coil→GND; Among them, the normally closed contact of the system feedback relay SFR1 is closed, the normally open contact of the time relay TR1 is opened, and the normally open contact of the locking relay LR2 is opened; (5) The driver D1 controlled by the first system is electrically connected to the system feedback relay SFR1.

2. The main and standby dual system automatic switching circuit according to claim 1 is characterized in that: The dual-system automatic switching circuit further includes: The LR1 activation circuit includes the system switching relay SSR2, the time relay TR1 and the time relay TR1 coil, and the circuit path signal flow direction is: PWR_VCC→AUTO→SSR2→TR1→LR1 coil→GND; Among them, the normally closed contact of the system switching relay SSR2 is closed, and the normally open contact of the time relay TR1 is opened; When the first system fails to start successfully, the LR1 activation circuit is used to switch the first system to the second system circuit activation, and the system automatically switches to the second system.

3. The main and standby dual system automatic switching circuit according to claim 1 is characterized in that: The dual-system automatic switching circuit includes: (1) The second system control circuit includes a time relay TR1, a time relay TR2, a locking relay LR2, a system switching relay SSR2 coil and a time relay TR2 coil, and the circuit path signal flow direction is: PWR_VCC→AUTO→TR1→TR2→LR2→SSR2 coil / TR2 coil→GND; Among them, the normally closed contact of the time relay TR1 is closed, the normally closed contact of the time relay TR2 is closed, and the normally open contact of the locking relay LR2 is opened; (2) The second system starting circuit includes a system switching relay SSR2, and the circuit path signal flow direction is: PWR_VCC→SSR2→Second system→GND; Among them, the normally open contact of the system switching relay SSR2 is disconnected; (3) The second system start-up holding circuit includes the system switching relay SSR1, the system switching relay SSR2 coil and the time relay TR2 coil, and the circuit path signal flow direction is: PWR_VCC→AUTO→SSR1→SSR2 coil / TR2 coil→GND; Among them, the normally closed contact of the system switching relay SSR1 is closed; (4) The second system switches to the first system circuit, including the system feedback relay SFR2, the time relay TR2, the locking relay LR1, the system switching relay SSR1 coil and the time relay TR1 coil, and the circuit path signal flow direction is: PWR_VCC→SFR2→TR2→LR1→SSR1 coil / TR1 coil→GND; Among them, the normally closed contact of the system feedback relay SFR2 is closed, the normally open contact of the time relay TR2 is opened, and the normally closed contact of the locking relay LR1 is closed; (5) The driver D2 controlled by the second system is electrically connected to the system feedback relay SFR2.

4. The main and standby dual system automatic switching circuit according to claim 3 is characterized in that: The dual-system automatic switching circuit further includes: The LR2 activation circuit includes the system switching relay SSR1, the time relay TR2 and the time relay TR2 coil, and the circuit path signal flow direction is: PWR_VCC→AUTO→SSR1→TR2→LR2 coil→GND; Among them, the normally closed contact of the system switching relay SSR1 is closed, and the normally open contact of the time relay TR2 is opened; When the second system fails to start, the LR2 activation circuit is used to switch the second system to the first system circuit activation, and the system attempts to switch to the first system.

5. A method for realizing automatic switching of a primary and a standby dual system, characterized in that: The method is implemented based on the active / standby dual system automatic switching circuit according to any one of claims 1 to 4, and comprises the following steps: Turn the system selection knob switch SSS to the Auto position, and the first system and the second system will be automatically switched through the dual-system automatic switching circuit; The switch between the primary and standby systems is automatic. When the first system starts, the second system is ready to start at any time. Once the first system fails to start, the second system starts immediately. When the second system starts, the first system is ready to start at any time. Once the second system fails to start, the first system starts to start immediately.

6. The method for realizing automatic switching of active and standby dual systems according to claim 5, characterized in that: When the system selection knob switch SSS is turned to the Auto position, the first system and the second system are automatically switched through the dual-system automatic switching circuit, including: The system selection knob switch SSS is turned to the Auto position, and the coil of the time relay TR1 and the coil of the system switching relay SSR1 are energized through the first system control circuit; when the coil of the system switching relay SSR1 is energized, then: The normally closed contact of SSR1 is disconnected, cutting off the startup and holding circuit of the second system; The normally open contact of SSR1 is closed, the first system start circuit is energized, and the first system starts to start; If the first system starts successfully, the first system sends a high level through the driver D1 to activate the system feedback relay SFR1, and the normally closed contact of SFR1 is disconnected, so that the first system switches to the second system circuit and disconnects, avoiding the simultaneous startup of the first system; If the first system fails to start successfully and the system feedback relay SFR1 cannot be energized and activated, then after the delay time of the time relay TR1 expires, the normally open contact of TR1 closes, and the coil of the locking relay LR1 is energized through the LR1 activation circuit; After the coil of the locking relay LR1 is energized, the normally open contact of LR2 is closed, and the circuit switching from the first system to the second system is activated, preparing to try to switch to the second system.

7. The method for realizing automatic switching of active and standby dual systems according to claim 6, characterized in that: When the system selection knob switch SSS is turned to the Auto position, the first system and the second system are automatically switched through the dual-system automatic switching circuit, including: When the first system switches to the second system circuit and is activated, the coil of the time relay TR2 and the coil of the system switching relay SSR2 are energized through the second system control circuit, then: The normally closed contact of the system switching relay SSR2 is disconnected, and the first system starts to keep the circuit de-energized, so that the coil of the system switching relay SSR1 and the coil of the time relay TR1 are de-energized, thereby de-energizing the first system; The system switching relay SSR1 is de-energized, the normally closed contact of the system switching relay SSR1 energizes the second system startup holding circuit, and the coil of the system switching relay SSR2 and the coil of the time relay TR2 are activated; The normally open contact of the system switching relay SSR2 is closed, the second system starting circuit is energized, and the second system is started; If the second system starts successfully, the second system sends a high level through the driver D2 to activate the coil of the system feedback relay SFR2, and the normally closed contact of the system feedback relay SFR2 is disconnected, disconnecting the second system and switching to the first system circuit to avoid the first system starting at the same time; If the second system fails to start successfully and the system feedback relay SFR2 cannot be activated, then after the delay time of the time relay TR2 expires, the normally open contact of TR2 closes, and the locking relay LR2 is energized through the LR2 activation circuit; after the LR2 coil is activated, the normally open contact of LR1 closes, and the second system switches to the first system circuit activation, and the system retries to activate the first system.

8. The method for realizing automatic switching of active and standby dual systems according to claim 5, characterized in that: When the system selection knob switch SSS is turned to the Auto position, the first system and the second system are automatically switched through the dual-system automatic switching circuit, which also includes: Turning the system selection knob switch SSS to the manual position directly starts the first system or the second system and enters the manual mode.

9. A control system, characterized in that: include: processor; a memory for storing processor-executable instructions; Wherein, the processor is configured to implement the method for realizing automatic switching of the active-standby dual system as described in any one of claims 5-8 when executing the executable instructions.

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