Bypass device of redundant channel
By adopting a shared bypass rotary switch design in the instrumentation and control system, the bypass logic of redundant channels is simplified, the problem of complex interlocking required for redundant channels in the existing technology is solved, and redundant channel bypass is realized without a communication path.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-04-03
AI Technical Summary
The bypass devices for redundant channels in existing instrumentation and control systems require complex bypass interlocking logic and are not applicable to redundant channel systems without communication links.
A single bypass rotary switch is used, with each bypass position corresponding to a redundant channel. The bypass function is achieved through hard-wiring connection, avoiding complex interlocking logic between redundant channels.
It simplifies system complexity and ensures that only one redundant channel is in bypass state at any given time, making it suitable for redundant channel systems without communication paths.
Smart Images
Figure CN224082349U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of automatic control technology, and in particular to a bypass device for redundant channels. Background Technology
[0002] Instrumentation and control systems typically incorporate redundant channels to meet the single-failure criterion design requirements and improve system reliability. To facilitate testing or maintenance under system operation or other conditions, a bypass function for the redundant channels needs to be designed to lock out their outputs, ensuring the safety of the testing or maintenance process.
[0003] In the current instrumentation and control system, each redundant channel is equipped with an independent bypass device in its cabinet. Through the communication path between redundant channels, the bypass status of this channel is sent to other redundant channels. Bypass interlocking is performed in each redundant channel to prevent multiple redundant channels from being bypassed at the same time.
[0004] However, this bypass triggering method, which is based on the bypass state of other redundant channels and blocks the bypass of this channel, requires complex bypass interlocking logic between the redundant channels, making the implementation of the function quite complicated. Utility Model Content
[0005] To address the aforementioned issues, this application provides a bypass device for redundant channels.
[0006] The embodiments of this application disclose the following technical solutions:
[0007] This application provides a bypass device for a redundant channel, including: a bypass panel, a terminal module, and a controller; the bypass panel includes a bypass rotary switch with at least two bypass positions, each bypass position corresponding to a redundant channel; the controller includes at least two sub-controllers, each sub-controller corresponding to a redundant channel; the output terminal of each bypass position in the terminal module is connected to the input terminal of the redundant channel corresponding to the bypass position;
[0008] The bypass panel is used to respond to the user's operation of rotating the bypass knob switch to the target bypass position among the at least two bypass positions, close the output wiring contact corresponding to the target bypass position, and send the contact closure signal of the target bypass position to the terminal module.
[0009] The terminal module is used to send a bypass signal to the sub-controller of the redundant channel corresponding to the target bypass position in response to the contact closure signal.
[0010] The controller is configured to bypass the redundant channel corresponding to the sub-controller in response to the bypass signal.
[0011] In one possible implementation, the bypass panel further includes at least two enable key switches, each of which corresponds to a redundant channel; in the terminal module, for the enable key switch and bypass position corresponding to the same redundant channel, the output terminal corresponding to the bypass position is connected to the first sub-input terminal of the corresponding redundant channel, and the output terminal corresponding to the function position of the enable key switch is connected to the second sub-input terminal of the corresponding redundant channel.
[0012] The enabling key switch is used to close the output wiring contact corresponding to the function position in response to the user rotating the enabling key switch to the function position, and send the contact closure signal of the function position to the terminal module.
[0013] The terminal module is used to send a bypass signal to the sub-controller of the redundant channel corresponding to the target bypass position in response to the contact closure signal of the target bypass position and the contact closure signal of the function position.
[0014] In one possible implementation, in the terminal module, for the enable key switch and bypass position corresponding to the same redundant channel, the first sub-output terminal corresponding to the bypass position is connected to the first sub-output terminal corresponding to the function position of the enable key switch, the second sub-output terminal corresponding to the bypass position is connected to the first sub-input terminal of the corresponding redundant channel, and the second sub-output terminal corresponding to the function position of the enable key switch is connected to the second sub-input terminal of the corresponding redundant channel.
[0015] In one possible implementation, the bypass panel further includes at least two indicator lights, each corresponding to a redundant channel; in the terminal module, for each indicator light, the first terminal of the indicator light is connected to the first output terminal of the redundant channel corresponding to the indicator light, and the second terminal of the indicator light is connected to the second output terminal of the redundant channel corresponding to the indicator light.
[0016] The controller is used to send a bypass feedback signal to the terminal module; the bypass feedback signal is used to indicate that the redundant channel corresponding to the sub-controller has been bypassed;
[0017] The terminal module is also used to illuminate the indicator light corresponding to the bypassed redundant channel in response to the bypass feedback signal.
[0018] In one possible implementation, the controller is specifically used for:
[0019] A bypass feedback signal is sent to the terminal module, and a preset voltage is provided to the indicator light corresponding to the bypassed redundant channel to illuminate the indicator light.
[0020] In one possible implementation, the bypass panel also includes a test light button;
[0021] The test lamp button is used to respond to the user pressing the test lamp button, close at least two test lamp contacts corresponding to the test lamp button, and send the test lamp signal to the terminal module; each test lamp contact corresponds to a redundant channel;
[0022] The terminal module is used to send the test light signal to the controller;
[0023] The controller is configured to respond to the test lamp signal by sending a lighting signal to the indicator lights corresponding to the at least two test lamp contacts, thereby lighting up the indicator lights.
[0024] In one possible implementation, in the terminal module, for each test lamp contact, the output terminal corresponding to the test lamp contact is connected to the input terminal of the redundant channel corresponding to the test lamp contact.
[0025] In one possible implementation, the terminal module includes a first terminal connector, hardware logic circuitry, and a second terminal connector.
[0026] The first terminal connector is used to connect the bypass panel to the terminal module;
[0027] The hardware logic circuit is used to connect the output terminal corresponding to each bypass position to the input terminal of the redundant channel corresponding to the bypass position.
[0028] The second terminal connector is used to connect the terminal module to the controller.
[0029] In one possible implementation, the bypass panel and the terminal module, as well as the terminal module and the controller, are connected by hardwiring.
[0030] In one possible implementation, the bypass rotary switch also includes a normal position;
[0031] The bypass panel is specifically used to disconnect all output wiring contacts corresponding to the bypass positions in response to the user rotating the bypass knob switch to the normal position.
[0032] Compared with the prior art, this application has the following beneficial effects:
[0033] In the bypass device for redundant channels provided in this application embodiment, each redundant channel shares a bypass rotary switch. Each bypass position of the bypass rotary switch corresponds to a redundant channel. When the bypass rotary switch is rotated to the target bypass position, only the output wiring contact corresponding to the target bypass position is closed, and the output wiring contacts corresponding to other bypass positions are open. This ensures that only one redundant channel is in the bypass state at any given time, and there is no need for complex bypass interlocking logic between the redundant channels, effectively reducing the complexity of the system. Attached Figure Description
[0034] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0035] Figure 1 This is a schematic diagram of an existing bypass interlock logic;
[0036] Figure 2 A schematic diagram of a bypass rotary switch provided in an embodiment of this application;
[0037] Figure 3 A schematic diagram of a bypass device provided in an embodiment of this application;
[0038] Figure 4 A schematic diagram of wiring contacts for a bypass panel provided in an embodiment of this application;
[0039] Figure 5 This is a wiring diagram of a terminal module provided in an embodiment of this application. Detailed Implementation
[0040] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.
[0041] In the current instrumentation and control system, each redundant channel is equipped with an independent bypass device in its cabinet. Through the communication path between redundant channels, the bypass status of this channel is sent to other redundant channels. Bypass interlocking is performed in each redundant channel to prevent multiple redundant channels from being bypassed at the same time.
[0042] Taking the redundant channel bypass scheme of a nuclear power plant as an example, the bypass signal is triggered by the bypass panel installed on each redundant channel, and the bypass signal is sent to the redundant channel. After receiving the bypass signal, the controller of the redundant channel sends its own bypass status to other redundant channels through the communication path.
[0043] To prevent two or more redundant channels from being bypassed simultaneously, bypass interlock logic is set in the controller logic. For example... Figure 1 As shown in the figure, this is a schematic diagram of an existing bypass interlock logic. When the first redundant channel is bypassed, the bypass signal of the first redundant channel is sent to the second, third, and fourth redundant channels through the communication path, and the bypass signals of the second, third, and fourth redundant channels are blocked by logic.
[0044] In this case, even if the bypass switch of the bypass panel of the second redundant channel and / or the third redundant channel and / or the fourth redundant channel is triggered, the second redundant channel, the third redundant channel and the fourth redundant channel after being blocked cannot be bypassed.
[0045] On the one hand, this bypass triggering method, which is based on the bypass state of other redundant channels and blocks the bypass of this channel, requires complex bypass interlocking logic between the redundant channels, making the function implementation quite complex.
[0046] On the other hand, current bypass interlocking measures rely on communication paths between different redundant channels, which cannot be applied to completely independent redundant channel instrumentation and control systems without communication links.
[0047] Based on this, in the bypass device for redundant channels provided in this application embodiment, each redundant channel can share a bypass rotary switch. Each bypass position of the bypass rotary switch corresponds to a redundant channel. When the bypass rotary switch is rotated to the target bypass position, only the output wiring contact corresponding to the target bypass position is closed, and the output wiring contacts corresponding to other bypass positions are open. This ensures that only one redundant channel is in the bypass state at any given time. There is no need for complex bypass interlocking logic between the redundant channels, which effectively reduces the complexity of the system.
[0048] The following description, in conjunction with the accompanying drawings, describes a bypass device for a redundant channel provided in an embodiment of this application. This application provides a bypass device for a redundant channel, including: a bypass panel, a terminal module, and a controller.
[0049] Hardwiring can be used between the bypass panel and the terminal module, and between the terminal module and the controller, to accommodate redundant channel instrumentation and control systems without communication paths.
[0050] In this embodiment, the bypass panel includes a bypass rotary switch with at least two bypass positions, each bypass position corresponding to a redundant channel. The controller includes at least two sub-controllers, each sub-controller corresponding to a redundant channel. The output terminal of each bypass position in the terminal module is connected to the input terminal of the redundant channel corresponding to the bypass position, so that when the bypass rotary switch is rotated to the bypass position, the sub-controller of the corresponding redundant channel can bypass the redundant channel.
[0051] In one possible implementation, the terminal module may include a first terminal connector, hardware logic circuitry, and a second terminal connector. The first terminal connector connects the bypass panel to the terminal module; the hardware logic circuitry connects the output terminal corresponding to each bypass position to the input terminal of the redundant channel corresponding to that bypass position; and the second terminal connector connects the terminal module to the controller. Communication between the bypass panel and the controller can be achieved based on this terminal module.
[0052] like Figure 2 As shown in the figure, this is a schematic diagram of a bypass rotary switch provided in an embodiment of this application. Taking a bypass rotary switch with four bypass positions as an example, when the user rotates the bypass rotary switch to the first bypass position, the first redundant channel corresponding to the first bypass position is bypassed, and the other redundant channels are not triggered to bypass; when the user rotates the bypass rotary switch to the second bypass position, the second redundant channel corresponding to the second bypass position is bypassed, and the other redundant channels are not triggered to bypass, and so on.
[0053] In this embodiment, since multiple redundant channels share a single bypass knob switch, the bypass knob switch can only be rotated to one bypass position at a time, and only one redundant channel is in bypass state at any given time. There is no need for complex bypass interlocking logic between the redundant channels, which effectively reduces the complexity of the system.
[0054] In one possible implementation, the bypass panel can, in response to a user rotating the bypass knob switch to a target bypass position among the at least two bypass positions, close the output wiring contact corresponding to the target bypass position and send a contact closure signal for the target bypass position to the terminal module.
[0055] In response to the contact closure signal, the terminal module sends a bypass signal to the sub-controller of the redundant channel corresponding to the target bypass position. Based on this, the controller can respond to the bypass signal to bypass the redundant channel corresponding to the sub-controller.
[0056] For example, such as Figure 2As shown, the bypass rotary switch also includes a normal position; when the user rotates the bypass rotary switch to the normal position, the bypass panel can respond to the user's operation of rotating the bypass rotary switch to the normal position by disconnecting all output wiring contacts corresponding to the bypass position.
[0057] In one possible implementation, the bypass panel further includes at least two enable key switches, each corresponding to a redundant channel. In the terminal module, for the enable key switch and bypass position corresponding to the same redundant channel, the output terminal corresponding to the bypass position is connected to the first sub-input terminal of the corresponding redundant channel, and the output terminal corresponding to the function position of the enable key switch is connected to the second sub-input terminal of the corresponding redundant channel.
[0058] The enable key is used to determine whether to bypass the corresponding redundant channel. For the bypass position and the enable key function position corresponding to the same redundant channel, if both are triggered, a bypass signal is sent to the controller to avoid accidental triggering of the bypass function due to misoperation.
[0059] In this embodiment, each enable key switch is a two-position type. That is, when the enable key switch is rotated to the function position, the output wiring contact corresponding to the function position is closed; when the enable key switch is rotated to the non-function position, the output wiring contact corresponding to the function position is open.
[0060] In this embodiment, the output terminal corresponding to the bypass position includes a first sub-output terminal corresponding to the bypass position and a second sub-output terminal corresponding to the bypass position, and the output terminal corresponding to the function position of the enable key switch includes a first sub-output terminal corresponding to the function position and a second output terminal corresponding to the function position.
[0061] In the terminal module, for the enable key switch and bypass position corresponding to the same redundant channel, the first sub-output terminal corresponding to the bypass position is connected to the first sub-output terminal corresponding to the function position of the enable key switch, the second sub-output terminal corresponding to the bypass position is connected to the first sub-input terminal of the corresponding redundant channel, and the second sub-output terminal corresponding to the function position of the enable key switch is connected to the second sub-input terminal of the corresponding redundant channel.
[0062] For example, in response to a user rotating the enable key switch to a function position, the output wiring contact corresponding to the function position closes, sending a contact closure signal for the function position to the terminal module. In response to both the contact closure signal for the target bypass position and the contact closure signal for the function position, the terminal module sends a bypass signal to the sub-controller of the redundant channel corresponding to the target bypass position, enabling the sub-controller of the redundant channel corresponding to the target bypass position to bypass the redundant channel.
[0063] In this embodiment of the application, the enable key can be used to reconfirm whether the corresponding redundant channel is bypassed, so as to avoid the bypass function being accidentally triggered due to misoperation.
[0064] In one possible implementation, the bypass panel further includes at least two indicator lights, each corresponding to a redundant channel. In the terminal module, for each indicator light, the first terminal of the indicator light is connected to the first output terminal of the redundant channel corresponding to the indicator light, and the second terminal of the indicator light is connected to the second output terminal of the redundant channel corresponding to the indicator light.
[0065] The indicator light is used to indicate whether the corresponding redundant channel is bypassed.
[0066] In this embodiment, after the sub-controller bypasses the redundant channel, the controller can send a bypass feedback signal to the terminal module. This bypass feedback signal indicates that the redundant channel corresponding to the sub-controller has been bypassed.
[0067] In response to the bypass feedback signal, the terminal module illuminates the indicator light corresponding to the redundant channel that has been bypassed.
[0068] In this embodiment, after the sub-controller bypasses the redundant channel, the sub-controller can send a bypass feedback signal to the terminal module and provide a preset voltage to the indicator light corresponding to the bypassed redundant channel to light up the indicator light.
[0069] It is understood that the preset voltage value is not specifically limited in the embodiments of this application, and it can be set according to needs. For example, the preset voltage can be 24V.
[0070] In this embodiment of the application, after the sub-controller bypasses the corresponding redundant channel, the user can be notified that the redundant channel has been bypassed by lighting the corresponding indicator light. At the same time, based on the lit indicator light, it can also be determined which redundant channel is currently being bypassed.
[0071] In one possible implementation, the bypass panel also includes a test light button for detecting whether the indicator light can be lit normally.
[0072] For example, the test lamp button can respond to a user pressing the test lamp button by closing at least two test lamp contacts corresponding to the test lamp button and sending the test lamp signal to the terminal module. Each test lamp contact corresponds to a redundant channel.
[0073] The terminal module sends the test lamp signal to the controller. In response to the test lamp signal, the controller sends a lighting signal to the indicator lights corresponding to the at least two test lamp contacts, thereby illuminating the indicator lights.
[0074] In one possible implementation, in the terminal module, for each test lamp contact, the output terminal corresponding to the test lamp contact is connected to the input terminal of the redundant channel corresponding to the test lamp contact.
[0075] In summary, in the bypass device for redundant channels provided in this application embodiment, each redundant channel shares a bypass rotary switch. Each bypass position of the bypass rotary switch corresponds to a redundant channel. When the bypass rotary switch is rotated to the target bypass position, only the output wiring contact corresponding to the target bypass position is closed, while the output wiring contacts corresponding to other bypass positions are open. This ensures that only one redundant channel is in the bypass state at any given time, and there is no need for complex bypass interlocking logic between the redundant channels, effectively reducing the complexity of the system.
[0076] For ease of understanding, the following is a general introduction to a bypass device for a redundant channel provided in the embodiments of this application.
[0077] like Figure 3 As shown, this figure is a schematic diagram of a bypass device provided in an embodiment of this application. The bypass device for the redundant channel includes a bypass panel, a terminal module, and a controller. The bypass panel and the terminal module, as well as the terminal module and the controller, are connected by hardwiring.
[0078] With four redundant channels, the bypass panel includes one test light button, one bypass rotary switch, four enable key switches, and four indicator lights.
[0079] The bypass rotary switch has one normal position and four bypass positions. The first bypass position corresponds to the first redundant channel; the second bypass position corresponds to the second redundant channel; the third bypass position corresponds to the third redundant channel; and the fourth bypass position corresponds to the fourth redundant channel.
[0080] The four enabling key switches include a first enabling key switch, a second enabling key switch, a third enabling key switch, and a fourth enabling key switch. Specifically, the first enabling key switch corresponds to the first bypass position and the first redundant channel; the second enabling key switch corresponds to the second bypass position and the second redundant channel; the third enabling key switch corresponds to the third bypass position and the third redundant channel; and the fourth enabling key switch corresponds to the fourth bypass position and the fourth redundant channel.
[0081] The four indicator lights are designated as the first indicator light, the second indicator light, the third indicator light, and the fourth indicator light. Specifically, the first indicator light corresponds to the first redundant channel; the second indicator light corresponds to the second redundant channel; the third indicator light corresponds to the third redundant channel; and the fourth indicator light corresponds to the fourth redundant channel.
[0082] like Figure 4 As shown in the figure, this figure is a schematic diagram of the wiring contacts of a bypass panel provided in an embodiment of this application.
[0083] The bypass rotary switch has four output wiring contacts, namely B1-1, B2-1, B3-1, and B4-1, which correspond to the first bypass position, the second bypass position, the third bypass position, and the fourth bypass position, respectively.
[0084] With the bypass knob switch in the normal position, all four output wiring contacts are open. With the bypass knob switch in the first bypass position, B1-1 is closed, while B2-1, B3-1, and B4-1 remain open. With the bypass knob switch in the second bypass position, B2-1 is closed, while B1-1, B3-1, and B4-1 remain open. With the bypass knob switch in the third bypass position, B3-1 is closed, while B1-1, B2-1, and B4-1 remain open. With the bypass knob switch in the fourth bypass position, B4-1 is closed, while B1-1, B2-1, and B3-1 remain open.
[0085] This ensures that only one redundant channel is in bypass mode at any given time, eliminating the need for complex bypass interlocking logic between redundant channels and effectively reducing system complexity.
[0086] Each enable key switch corresponds to an output wiring contact for a function position, namely the first enable key switch, the second enable key switch, the third enable key switch, and the fourth enable key switch, which correspond to output wiring contacts B1-2, B2-2, B3-2, and B4-2 respectively, and are used to realize the bypass confirmation function of redundant channels.
[0087] All enable key switches are 2-position type. When rotated to the function position, the corresponding output connection contact closes; when rotated to the non-function position, the corresponding output connection contact opens. That is, when the first enable key switch is rotated to the function position, B1-2 closes, and when rotated to the non-function position, B1-2 opens; when the second enable key switch is rotated to the function position, B2-2 closes, and when rotated to the non-function position, B2-2 opens; when the third enable key switch is rotated to the function position, B3-2 closes, and when rotated to the non-function position, B3-2 opens; when the fourth enable key switch is rotated to the function position, B4-2 closes, and when rotated to the non-function position, B4-2 opens.
[0088] The first, second, third, and fourth indicator lights correspond to input wiring contacts F1, F2, F3, and F4, respectively. The indicator lights illuminate when the input wiring contacts are connected to the preset voltage; otherwise, they are off. During non-testing phases, if an indicator light is illuminated, it indicates that the corresponding redundant channel is in bypass mode; during testing phases, if an indicator light is illuminated, it indicates that the indicator light is functioning correctly.
[0089] The test lamp button has four test lamp contacts: L1, L2, L3, and L4. L1 corresponds to the first indicator light; L2 to the second indicator light; L3 to the third indicator light; and L4 to the fourth indicator light. When the test lamp button is pressed, L1, L2, L3, and L4 are all in the closed state; when the test lamp button is released, L1, L2, L3, and L4 are all in the open state.
[0090] The controller comprises four sub-controllers: the first sub-controller, the second sub-controller, the third sub-controller, and the fourth sub-controller. The first sub-controller corresponds to the first redundant channel; the second sub-controller corresponds to the second redundant channel; the third sub-controller corresponds to the third redundant channel; and the fourth sub-controller corresponds to the fourth redundant channel. Each sub-controller can receive signals from the terminal modules through its corresponding acquisition (DI) module and send signals to the terminal modules through its corresponding output (DO) module.
[0091] like Figure 5 As shown in the figure, this figure is a wiring diagram of a terminal module provided in an embodiment of this application.
[0092] The terminal module includes a first terminal connector, hardware logic circuitry, and a second terminal connector.
[0093] The first terminal connector includes 16 wiring terminals, with the outer side connected to the bypass panel via hard wiring and the inner side connected to the hardware logic circuit.
[0094] In the hardware logic circuit, for the enable key switch and bypass position corresponding to the same redundant channel, their output terminals are connected via an AND logic circuit. That is, the first sub-output terminal corresponding to the bypass position is connected to the first sub-output terminal corresponding to the function position of the enable key switch, the second sub-output terminal corresponding to the bypass position is connected to the first sub-input terminal of the corresponding redundant channel, and the second sub-output terminal corresponding to the function position of the enable key switch is connected to the second sub-input terminal of the corresponding redundant channel.
[0095] For example, such as Figure 5 As shown, corresponding to the first bypass position and the first enable key switch of the first redundant channel, the first sub-output terminal of the first bypass position is connected to the first sub-output terminal of the first enable key switch, and the second sub-output terminal (a) of the first bypass position is connected to the first sub-input terminal (5' in the hardware logic circuit) of the first redundant channel. The second sub-output terminal (a') of the function position of the first enable key switch is connected to the second sub-input terminal (9' in the hardware logic circuit) of the first redundant channel. Similarly, corresponding to the second bypass position and the second enable key switch of the second redundant channel, the first sub-output terminal of the second bypass position is connected to the first sub-output terminal of the second enable key switch, and the second sub-output terminal (b) of the second bypass position is connected to the first sub-input terminal (6' in the hardware logic circuit) of the second redundant channel. The second sub-output terminal (b') of the function position of the second enable key switch is connected to the second sub-input terminal (10' in the hardware logic circuit) of the second redundant channel. The third bypass position and the third enable key switch of the third redundant channel are connected. The first sub-output terminal of the third bypass position is connected to the first sub-output terminal of the third enable key switch. The second sub-output terminal (c) of the third bypass position is connected to the first sub-input terminal (7' in the hardware logic circuit) of the third redundant channel. The second sub-output terminal (c') of the function position of the third enable key switch is connected to the second sub-input terminal (11') of the third redundant channel. The fourth bypass position and the fourth enable key switch of the fourth redundant channel are connected. The first sub-output terminal of the fourth bypass position is connected to the first sub-output terminal of the fourth enable key switch. The second sub-output terminal (d) of the fourth bypass position is connected to the first sub-input terminal (8') of the fourth redundant channel. The second sub-output terminal (d') of the function position of the fourth enable key switch is connected to the second sub-input terminal (12') of the fourth redundant channel.
[0096] In the hardware logic circuit, the output terminal corresponding to each test lamp contact is connected to the input terminal of the redundant channel corresponding to that test lamp contact. For example, the output terminal corresponding to the first test lamp contact is connected to the input terminal of the first redundant channel. Figure 5In the I-1 section, the output terminal corresponding to the second test lamp contact is connected to the input terminal of the second redundant channel, corresponding to... Figure 5 II-1; the output terminal corresponding to the third test lamp contact is connected to the input terminal of the third redundant channel, corresponding to Figure 5 III-1; the output terminal corresponding to the fourth test lamp contact is connected to the input terminal of the fourth redundant channel, corresponding to Figure 5 IV-1 in the middle.
[0097] In the hardware logic circuit, the first terminal of each indicator light is connected to the first output terminal of the redundant channel corresponding to the indicator light, and the second terminal of each indicator light is connected to the second output terminal of the redundant channel corresponding to the indicator light.
[0098] For example, the first terminal of the first indicator light is connected to the first output terminal of the first redundant channel, and the second terminal of the first indicator light is connected to the second output terminal of the first redundant channel, corresponding to... Figure 5 In the I-3 section, the first terminal of the second indicator light is connected to the first output terminal of the second redundant channel, and the second terminal of the second indicator light is connected to the second output terminal of the second redundant channel, corresponding to... Figure 5 II-3; the first terminal of the third indicator light is connected to the first output terminal of the third redundant channel, and the second terminal of the third indicator light is connected to the second output terminal of the third redundant channel, corresponding to Figure 5 In section III-3; the first terminal of the fourth indicator light is connected to the first output terminal of the fourth redundant channel, and the second terminal of the fourth indicator light is connected to the second output terminal of the fourth redundant channel, corresponding to... Figure 5 IV-3 in the middle.
[0099] The second terminal connector includes 12 wiring terminals, which are hardwired to the acquisition or output modules of each redundant channel controller.
[0100] Each sub-controller in the controller can receive bypass signals from the terminal modules through the corresponding acquisition modules. The sub-controller executes the bypass logic function within the sub-controller based on the bypass signals to bypass the corresponding redundant channels.
[0101] The sub-controller can use software logic to OR the bypass signal and the test lamp signal, and then send the bypass feedback signal to the terminal module via the output module to light up the indicator light on the bypass panel.
[0102] For example, when the user presses the test light button, L1, L2, L3, and L4 are closed, and the first redundant channel, the second redundant channel, the third redundant channel, and the fourth redundant channel receive the test light signal and send their respective bypass feedback signals to the terminal module to light up the first indicator light, the second indicator light, the third indicator light, and the fourth indicator light.
[0103] When the first, second, third, and fourth indicator lights are all lit, it can be confirmed that the operating logic of each redundant channel and each indicator light are normal.
[0104] Based on this, the process of bypassing the first redundant channel will be introduced as an example.
[0105] Release the test light button; L1, L2, L3, and L4 are disconnected. Turn the bypass knob switch to the first bypass position; B1-1 is closed, while B2-1, B3-1, and B4-1 remain open. Turn the first enable key switch to the function position; B1-2 is closed. With both B1-1 and B1-2 closed, the bypass panel can send a bypass signal for the first redundant channel to the first sub-controller via the terminal module. In response to this bypass signal, the first sub-controller sends a bypass feedback signal to the terminal module, illuminating the first indicator light.
[0106] In summary, the bypass device for redundant channels provided in this application embodiment can ensure that only one redundant channel is in bypass state at any given time, and there is no need for complex bypass interlocking logic between redundant channels, which effectively reduces the complexity of the system.
[0107] Meanwhile, through an AND logic circuit inside the terminal module, a bypass signal can only be sent to the corresponding redundant channel when the enable key switch in the function position corresponds to the same redundant channel as the target bypass position, thus avoiding accidental triggering of the bypass function due to misoperation.
[0108] The device provided in this application does not rely on the communication path between redundant channels, and can be applied to scenarios where there is no communication path between redundant channels, thus having greater applicability.
[0109] The above description is merely one specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A bypass device for redundant channels, characterized in that The bypass panel, the terminal module, and the controller; the bypass panel comprises a bypass knob switch with at least two bypass gears, each of which corresponds to a redundant channel; the controller comprises at least two sub-controllers, each of which corresponds to a redundant channel; the output terminal corresponding to each bypass gear in the terminal module is connected with the input terminal of the redundant channel corresponding to the bypass gear; The bypass panel is used to close the output wiring contact point corresponding to the target bypass gear in response to the operation of rotating the bypass knob switch to the target bypass gear among the at least two bypass gears, and send a contact closing signal of the target bypass gear to the terminal module; The terminal module is used to send a bypass signal to the sub-controller of the redundant channel corresponding to the target bypass gear in response to the contact closing signal; The controller is used to bypass the redundant channel corresponding to the sub-controller in response to the bypass signal. The bypass panel further comprises at least two enable key switches, each of which corresponds to a redundant channel; in the terminal module, for the enable key switch and the bypass gear corresponding to the same redundant channel, the output terminal corresponding to the bypass gear is connected with the first sub-input terminal of the corresponding redundant channel, and the output terminal corresponding to the function gear of the enable key switch is connected with the second sub-input terminal of the corresponding redundant channel; 2. The apparatus of claim 1, wherein, The enable key switch is used to close the output wiring contact point corresponding to the function gear in response to the operation of rotating the enable key switch to the function gear, and send a contact closing signal of the function gear to the terminal module; The terminal module is used to send a bypass signal to the sub-controller of the redundant channel corresponding to the target bypass gear in response to the contact closing signal of the target bypass gear and the contact closing signal of the function gear. In the terminal module, for the enable key switch and the bypass gear corresponding to the same redundant channel, the first sub-output terminal corresponding to the bypass gear is connected with the first sub-output terminal corresponding to the function gear of the enable key switch, the second sub-output terminal corresponding to the bypass gear is connected with the first sub-input terminal of the corresponding redundant channel, and the second sub-output terminal corresponding to the function gear of the enable key switch is connected with the second sub-input terminal of the corresponding redundant channel.
3. The apparatus of claim 2, wherein, The bypass panel further comprises at least two indicator lights, each of which corresponds to a redundant channel; in the terminal module, for each indicator light, the first terminal of the indicator light is connected with the first output terminal of the redundant channel corresponding to the indicator light, and the second terminal of the indicator light is connected with the second output terminal of the redundant channel corresponding to the indicator light; 4. The apparatus of claim 1, wherein, The controller is used to send a bypass feedback signal to the terminal module; the bypass feedback signal is used to indicate that the redundant channel corresponding to the sub-controller has been bypassed; The terminal module is further used to light up the indicator light corresponding to the bypassed redundant channel in response to the bypass feedback signal. The controller is specifically used for:
5. The apparatus of claim 4, wherein, The bypass feedback signal is sent to the terminal module, and a preset voltage is provided to the indicator lamp corresponding to the bypassed redundant channel to light up the indicator lamp.
6. The apparatus of claim 1, wherein, The bypass panel further comprises a test light button. The test light button is configured to close at least two test light contacts corresponding to the test light button in response to a user pressing the test light button, and send a test light signal to the terminal module. Each test light contact corresponds to a redundant channel. The terminal module is configured to send the test light signal to the controller. The controller is configured to send a lighting signal to the indicator lamp corresponding to the at least two test light contacts in response to the test light signal, and light up the indicator lamp.
7. The apparatus of claim 6, wherein, In the terminal module, for each test light contact, an output end corresponding to the test light contact is connected to an input end of a redundant channel corresponding to the test light contact.
8. The device of any one of claims 1-7, wherein, The terminal module comprises a first terminal connector, a hardware logic circuit, and a second terminal connector. The first terminal connector is configured to connect the bypass panel to the terminal module. The hardware logic circuit is configured to connect an output terminal corresponding to each bypass gear to an input terminal of a redundant channel corresponding to the bypass gear. The second terminal connector is configured to connect the terminal module to the controller.
9. The device of any one of claims 1-7, wherein, The bypass panel and the terminal module, and the terminal module and the controller are connected by hardwiring.
10. The device of any one of claims 1-7, wherein, The bypass knob switch further comprises a normal gear. The bypass panel is specifically configured to disconnect all output wiring contact points corresponding to the bypass gears in response to a user rotating the bypass knob switch to the normal gear.