A quadruple hot standby node control device
By designing the switching node output control circuit of multiple MCUs and isolation circuits, combining cross control and independent power supply, the problem of degradation of the existing quadrupole system in the event of failure is solved, and high stability and high reliability output control is achieved to ensure that Quadrupole can still be maintained in case of failure.
Patent Information
- Application Number
- CN202411148178.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2044-08-21
AI Technical Summary
The existing four-fold hot spare system will be downgraded to two-fold hot spare when there is a minor failure in any two circuits, and it will not be able to effectively maintain the four-fold hot spare state.
A switch node output control circuit including multiple MCUs and isolation circuits is designed. The cross-control and independent power supply system ensure that the quadrupole can still be maintained when any circuit circuit fails. Bus communication and optocoupling isolation circuit are used for signal feedback. and detection.
At the same cost situation, high stability and high reliability output control are achieved, ensuring that higher heavy thermal standby status can be maintained in the event of failure of some internal circuits.
Smart Images
Figure CN118655762B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of rail transit technology, and more specifically, to a quadruple hot standby node control device. Background Art
[0002] The existing technology realizes quadruple hot standby by using four circuits. This technology has defects. If any two circuits have small faults, the quadruple hot standby will be turned into double hot standby.
[0003] Therefore, how to provide a quadruple hot standby node control device has become a technical problem that urgently needs to be solved in this field. Summary of the invention
[0004] The present invention provides a quadruple hot standby node control device, comprising a switch node output control circuit;
[0005] The switch node output control circuit includes: a first MCU, a second MCU, a third MCU, a fourth MCU, a first isolation circuit, a second isolation circuit, a third isolation circuit, a fourth isolation circuit, a first switch node, a second switch node, a third switch node and a fourth switch node;
[0006] The first MCU is connected to the first isolation circuit; the second MCU is connected to the second isolation circuit; the third MCU is connected to the third isolation circuit; the fourth MCU is connected to the fourth isolation circuit; the first isolation circuit is connected to the first switch node and the second switch node respectively; the second isolation circuit is connected to the first switch node and the second switch node respectively; the third isolation circuit is connected to the third switch node and the fourth switch node respectively; the fourth isolation circuit is connected to the third switch node and the fourth switch node respectively.
[0007] Optionally, the output states of the first switch node, the second switch node, the third switch node and the fourth switch node are fed back to the first MCU, the second MCU, the third MCU and the fourth MCU through the first isolation circuit, the second isolation circuit, the third isolation circuit and the fourth isolation circuit.
[0008] Optionally, the first MCU and the first isolation circuit and the second MCU and the second isolation circuit cross-control the first switch node and the second switch node, the third MCU and the third isolation circuit and the fourth MCU and the fourth isolation circuit cross-control the third switch node and the fourth switch node, forming a 2×2 hot standby mode.
[0009] Optionally, the first MCU and the first isolation circuit, the second MCU and the second isolation circuit, the third MCU and the third isolation circuit, and the fourth MCU and the fourth isolation circuit all use independent power supply systems.
[0010] Optionally, the first MCU, the second MCU, the third MCU and the fourth MCU are connected through bus communication.
[0011] Optionally, the bus communication uses a dual-channel CAN bus, an SPI bus or a UART serial port.
[0012] Optionally, the device further comprises: an external node detection circuit;
[0013] The external node detection circuit includes: a first MCU, a second MCU, a third MCU, a fourth MCU, a fifth isolation circuit, a sixth isolation circuit, a seventh isolation circuit and an eighth isolation circuit;
[0014] The external node signal is connected to the fifth isolation circuit, the sixth isolation circuit, the seventh isolation circuit and the eighth isolation circuit respectively; the fifth isolation circuit is connected to the first MCU; the sixth isolation circuit is connected to the second MCU; the seventh isolation circuit is connected to the third MCU; and the eighth isolation circuit is connected to the fourth MCU.
[0015] Optionally, the external node detection circuit further includes: a first diode, a second diode, a third diode, a fourth diode, a first fuse, a second fuse, a third fuse and a fourth fuse;
[0016] The first diode and the first fuse are arranged between the external node signal and the fifth isolation circuit;
[0017] The second diode and the second fuse are arranged between the external node signal and the sixth isolation circuit;
[0018] The third diode and the third fuse are arranged between the external node signal and the seventh isolation circuit;
[0019] The fourth diode and the fourth fuse are disposed between the external node signal and the eighth isolation circuit.
[0020] Optionally, the external node detection circuit further includes: a first comparator, a second comparator, a third comparator and a fourth comparator;
[0021] The external node signal passes through the first diode and the first fuse in sequence, and then performs threshold comparison through the first comparator, and the comparison result enters the first MCU through the fifth isolation circuit;
[0022] The external node signal passes through the second diode and the second fuse in sequence, and then performs threshold comparison through the second comparator, and the comparison result enters the second MCU through the sixth isolation circuit;
[0023] The external node signal passes through the third diode and the third fuse in sequence, and then performs threshold comparison through the third comparator, and the comparison result enters the third MCU through the seventh isolation circuit;
[0024] The external node signal passes through the fourth diode and the fourth fuse in sequence, and then performs threshold comparison through the fourth comparator. The comparison result enters the fourth MCU through the eighth isolation circuit.
[0025] Optionally, the fifth isolation circuit, the sixth isolation circuit, the seventh isolation circuit and the eighth isolation circuit are optocoupler isolations.
[0026] According to the technical content disclosed in the present invention, the following beneficial effects are achieved: under the same cost, highly stable and reliable output control can be achieved, especially when a failure occurs in some internal circuits, a higher hot standby can still be maintained.
[0027] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
[0029] Figure 1 A schematic diagram of a quadruple hot standby node control device provided according to an embodiment;
[0030] Figure 2 A schematic diagram of a switch node output control circuit provided according to an embodiment;
[0031] Figure 3 The figure is a schematic diagram of an external node detection circuit provided according to an embodiment.
[0032] Explanation of the accompanying drawings: U1-fifth isolation circuit, U2-sixth isolation circuit, U3-seventh isolation circuit, U4-eighth isolation circuit, D1-first diode, D2-second diode, D3-third diode, D4-fourth diode, FU1-first fuse, FU2-second fuse, FU3-third fuse, FU4-fourth fuse, IN+ is the positive pole of the external node signal, and IN- is the negative pole of the external node signal. DETAILED DESCRIPTION
[0033] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.
[0034] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
[0035] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.
[0036] In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.
[0037] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.
[0038] According to the present invention, Figure 1 and Figure 2 As shown, a quadruple hot standby node control device is provided, including a switch node output control circuit;
[0039] The switch node output control circuit includes: a first MCU, a second MCU, a third MCU, a fourth MCU, a first isolation circuit, a second isolation circuit, a third isolation circuit, a fourth isolation circuit, a first switch node, a second switch node, a third switch node and a fourth switch node;
[0040] The first MCU is connected to the first isolation circuit; the second MCU is connected to the second isolation circuit; the third MCU is connected to the third isolation circuit; the fourth MCU is connected to the fourth isolation circuit; the first isolation circuit is connected to the first switch node and the second switch node respectively; the second isolation circuit is connected to the first switch node and the second switch node respectively; the third isolation circuit is connected to the third switch node and the fourth switch node respectively; the fourth isolation circuit is connected to the third switch node and the fourth switch node respectively.
[0041] The internal programs of the first MCU, the second MCU, the third MCU and the fourth MCU are set with complete logic control, and can take corresponding operation control when any circuit fails, so that the entire device is not affected by the failure and ensure the correctness of node output and node status input.
[0042] The first MCU and the first isolation circuit, the second MCU and the second isolation circuit, the third MCU and the third isolation circuit, and the fourth MCU and the fourth isolation circuit all use independent power supply systems. In this case, any fault in any circuit will not affect the normal operation of other circuits.
[0043] The first MCU and the first isolation circuit and the second MCU and the second isolation circuit cross-control the first switch node and the second switch node, and the third MCU and the third isolation circuit and the fourth MCU and the fourth isolation circuit cross-control the third switch node and the fourth switch node, forming a 2×2 hot standby mode. With this hot standby mode, when part of the circuit inside the circuit fails, the opposite circuit can be cross-utilized to continue to form a hot standby. Based on this principle, a longer circuit life and more reliable and stable switch node control can be maintained than the prior art. It can ensure both reliable closure of the node and reliable disconnection of the node.
[0044] In some embodiments, the output states of the first switch node, the second switch node, the third switch node and the fourth switch node are fed back to the first MCU, the second MCU, the third MCU and the fourth MCU through the first isolation circuit, the second isolation circuit, the third isolation circuit and the fourth isolation circuit to achieve multiple complete detections, thereby ensuring that the node outputs are consistent with what is required.
[0045] In some embodiments, the first MCU, the second MCU, the third MCU and the fourth MCU are communicatively connected via a bus.
[0046] The bus communication adopts a dual-channel CAN bus, SPI bus or UART serial port, and electrical isolation is added between the communication bus and the main control chip to prevent a bus failure caused by a failure of a certain main control chip from affecting the other three main control chips.
[0047] The first MCU, the second MCU, the third MCU and the fourth MCU use 32-bit ARM core microcontrollers, and the microcontrollers have at least 64 pins, or even 100 pins or 144 pins. More pins represent more GPIOs, and more node detection and node output can be managed.
[0048] The output of the microcontroller passes through the isolation circuit and then controls the relay, and the node closing and disconnecting is achieved through the relay stage.
[0049] The Arm core microcontroller must have dual CAN bus, SPI bus and UART interface.
[0050] The dual CAN bus can not only communicate within the device, but also communicate with the outside world.
[0051] The SPI bus is mainly used for internal communication of the board.
[0052] The UART interface can be used for both internal and external communications, and can achieve more complex functions.
[0053] Each node control circuit is electrically independent and does not affect each other under any circumstances.
[0054] In some embodiments, Figure 1 and Figure 3 As shown, the device further includes: an external node detection circuit;
[0055] The external node detection circuit includes: a first MCU, a second MCU, a third MCU, a fourth MCU, a fifth isolation circuit U1, a sixth isolation circuit U2, a seventh isolation circuit U3 and an eighth isolation circuit U4;
[0056] The external node signal is connected to the fifth isolation circuit U1, the sixth isolation circuit U2, the seventh isolation circuit U3 and the eighth isolation circuit U4 respectively through the external node signal positive electrode IN+ and the external node signal negative electrode IN-; the fifth isolation circuit U1 is connected to the first MCU; the sixth isolation circuit U2 is connected to the second MCU; the seventh isolation circuit U3 is connected to the third MCU; the eighth isolation circuit U4 is connected to the fourth MCU.
[0057] If any circuit fails, it will not affect the correctness of the node status detection of other circuits. Similarly, the node status is cross-linked 2×2 into the 4 main control chips to ensure the 2×2 mode 4-way hot standby node status detection.
[0058] The external node detection circuit further includes: a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a first fuse FU1, a second fuse FU2, a third fuse FU3 and a fourth fuse FU4;
[0059] The first diode D1 and the first fuse FU1 are arranged between the external node signal and the fifth isolation circuit U1;
[0060] The second diode D2 and the second fuse FU2 are arranged between the external node signal and the sixth isolation circuit U2;
[0061] The third diode D3 and the third fuse FU3 are arranged between the external node signal and the seventh isolation circuit U3;
[0062] The fourth diode D4 and the fourth fuse FU4 are arranged between the external node signal and the eighth isolation circuit U4.
[0063] The external node detection circuit further includes: a first comparator, a second comparator, a third comparator and a fourth comparator;
[0064] The external node signal passes through the first diode D1 and the first fuse FU1 in sequence, and then performs threshold comparison through the first comparator, and the comparison result enters the first MCU through the fifth isolation circuit U1;
[0065] The external node signal passes through the second diode D2 and the second fuse FU2 in sequence, and then performs threshold comparison through the second comparator. The comparison result enters the second MCU through the sixth isolation circuit U2;
[0066] The external node signal passes through the third diode D3 and the third fuse FU3 in sequence, and then performs threshold comparison through the third comparator. The comparison result enters the third MCU through the seventh isolation circuit U3;
[0067] The external node signal passes through the fourth diode D4 and the fourth fuse FU4 in sequence, and then performs threshold comparison through the fourth comparator. The comparison result enters the fourth MCU through the eighth isolation circuit U4.
[0068] The fifth isolation circuit U1 , the sixth isolation circuit U2 , the seventh isolation circuit U3 and the eighth isolation circuit U4 are optical coupler isolations.
[0069] In summary, the technical content disclosed in the present invention can achieve highly stable and reliable output control at the same cost, especially when a failure occurs in some internal circuits, a higher hot standby can still be maintained.
[0070] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.
Claims
1. A quadruple hot standby node control device, characterized in that: include: Switch node output control circuit; The switch node output control circuit includes: a first MCU, a second MCU, a third MCU, and a fourth MCU; a first isolation circuit, a second isolation circuit, a third isolation circuit, and a fourth isolation circuit; a first switch node, a second switch node, a third switch node, and a fourth switch node; The first MCU is connected to the first isolation circuit; the second MCU is connected to the second isolation circuit; the third MCU is connected to the third isolation circuit; the fourth MCU is connected to the fourth isolation circuit; the first isolation circuit is connected to the first switch node and the second switch node respectively; the second isolation circuit is connected to the first switch node and the second switch node respectively; the third isolation circuit is connected to the third switch node and the fourth switch node respectively; the fourth isolation circuit is connected to the third switch node and the fourth switch node respectively; The first MCU and the first isolation circuit and the second MCU and the second isolation circuit cross-control the first switch node and the second switch node, the third MCU and the third isolation circuit and the fourth MCU and the fourth isolation circuit cross-control the third switch node and the fourth switch node, forming a 2×2 hot standby mode; The first MCU and the first isolation circuit, the second MCU and the second isolation circuit, the third MCU and the third isolation circuit, and the fourth MCU and the fourth isolation circuit all use independent power supply systems; the device also includes: an external node detection circuit; The external node detection circuit includes: a first MCU, a second MCU, a third MCU, a fourth MCU, a fifth isolation circuit, a sixth isolation circuit, a seventh isolation circuit and an eighth isolation circuit; The external node signal is connected to the fifth isolation circuit, the sixth isolation circuit, the seventh isolation circuit and the eighth isolation circuit respectively; the fifth isolation circuit is connected to the first MCU; the sixth isolation circuit is connected to the second MCU; the seventh isolation circuit is connected to the third MCU; and the eighth isolation circuit is connected to the fourth MCU.
2. The quadruple hot standby node control device according to claim 1, characterized in that: The output states of the first switch node, the second switch node, the third switch node and the fourth switch node are fed back to the first MCU, the second MCU, the third MCU and the fourth MCU through the first isolation circuit, the second isolation circuit, the third isolation circuit and the fourth isolation circuit.
3. The quadruple hot standby node control device according to claim 1, characterized in that: The first MCU, the second MCU, the third MCU and the fourth MCU are connected to each other through a bus communication.
4. The quadruple hot standby node control device according to claim 3, characterized in that: The bus communication adopts a dual-channel CAN bus, an SPI bus or a UART serial port.
5. The quadruple hot standby node control device according to claim 1, characterized in that: The external node detection circuit further includes: a first diode, a second diode, a third diode, a fourth diode, a first fuse, a second fuse, a third fuse and a fourth fuse; The first diode and the first fuse are arranged between the external node signal and the fifth isolation circuit; The second diode and the second fuse are arranged between the external node signal and the sixth isolation circuit; The third diode and the third fuse are arranged between the external node signal and the seventh isolation circuit; The fourth diode and the fourth fuse are disposed between the external node signal and the eighth isolation circuit.
6. The quadruple hot standby node control device according to claim 5, characterized in that: The external node detection circuit further includes: a first comparator, a second comparator, a third comparator and a fourth comparator; The external node signal passes through the first diode and the first fuse in sequence, and then performs threshold comparison through the first comparator, and the comparison result enters the first MCU through the fifth isolation circuit; The external node signal passes through the second diode and the second fuse in sequence, and then performs threshold comparison through the second comparator, and the comparison result enters the second MCU through the sixth isolation circuit; The external node signal passes through the third diode and the third fuse in sequence, and then performs threshold comparison through the third comparator, and the comparison result enters the third MCU through the seventh isolation circuit; The external node signal passes through the fourth diode and the fourth fuse in sequence, and then performs threshold comparison through the fourth comparator. The comparison result enters the fourth MCU through the eighth isolation circuit.
7. The quadruple hot standby node control device according to claim 1, characterized in that: The fifth isolation circuit, the sixth isolation circuit, the seventh isolation circuit and the eighth isolation circuit are optocoupler isolations.