Logic modular design method suitable for nuclear power plant
Through the logic modular design method, logic control is achieved using normally closed contacts and normally open contacts composed of relays, which solves the problems of maintainability and low space utilization of the relay logic circuit in the DCS system of nuclear power plant, and improves flexibility and maintainability.
Patent Information
- Application Number
- CN202510318712.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2025-07-11
AI Technical Summary
In the DCS system of nuclear power plants, traditional relay logic circuits have problems such as poor maintainability, poor flexibility and low space utilization, which leads to difficulty in positioning, difficult maintenance and large space occupancy.
The logical modular design method is adopted, and the relay is formed through relay coils, input ports and multiple sets of output ports. Logical control is realized using normally closed contacts and normally open contacts, forming an OR, non-logical module and RS flip-flop logic module, modular construction and bridge, and achieving free combination of logic functions.
It improves the flexibility and maintainability of the system, reduces the difficulty of fault location and maintenance, reduces space occupation, supports loop stability during function expansion and changes, and improves space utilization.
Smart Images
Figure CN120295231A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of logic modularization, and more specifically, it relates to a logic modular design method applicable to nuclear power plants. Background Art
[0002] Currently, in the DCS system of nuclear power plants, relays are still used to build manual hard logic, and traditional wires are used to connect relay logic circuits. The following problems exist in use:
[0003] 1. Poor maintainability; it is difficult to locate relay faults, and the later maintenance is difficult;
[0004] 2. Poor flexibility; when function expansion or modification is required, it may lead to changes in the wiring or layout of the entire circuit;
[0005] 3. Low space utilization rate; when conducting large-scale control logic design, the volume is huge and it occupies a large amount of cabinet space. Summary of the Invention
[0006] The purpose of the present invention is to provide a logic modular design method applicable to nuclear power plants, optimize the disadvantages of traditional relay logic circuits, build logic modules based on logic modular relays, realize free combination of logic functions, and improve the flexibility, maintainability and space utilization rate of the system.
[0007] The above technical purpose of the present invention is achieved through the following technical solutions:
[0008] In a first aspect, the present application provides a logic modular design method applicable to nuclear power plants, including the following specific steps:
[0009] Obtain the module type of the target logic module, determine the number of relays used to build the target logic module according to the module type, and build the target logic module through the corresponding number of relays. The target logic module includes at least AND, OR, NOT logic modules and RS flip-flop logic modules.
[0010] Advantages of the present invention:
[0011] In this solution, first, the relays in the present application are constituted by relay coils, input ports and multiple groups of output ports, etc.; secondly, the constituted relays include two groups of normally closed contacts and two groups of normally open contacts. One end of the relay coil is connected to the negative pole of the power supply, the other end of the relay coil is connected to the negative pole of the input port, and the positive pole of the input port is connected to the positive pole of the power supply to realize controlling whether the relay coil is energized through the input port; finally, in the case of controlling whether the relay coil is energized, control the on-off of the two groups of normally closed contacts and the two groups of normally open contacts in the relay, and finally realize logic control.
[0012] In this solution, relays that can form various logic modules are used to solve the problems of poor maintainability, poor flexibility, and low space utilization rate, reduce the difficulty of relay fault location and the difficulty of later maintenance, and when function expansion or change is required, it will not cause changes in the wiring or layout of the entire circuit; at the same time, when conducting large-scale control logic design, using this relay effectively reduces the occupied space.
[0013] Based on the above technical solution, the present invention can also be improved as follows.
[0014] Further, the above method further includes:
[0015] Obtain the function requirements of the target printed circuit board, determine the module types and module quantities of each target logic module in the target printed circuit board according to the integration requirements, and build multiple target logic modules corresponding to the module types and corresponding module quantities in the target printed circuit board through relays. Logical construction is carried out among the multiple target logic modules in a bridging manner to meet the function requirements.
[0016] Further, the above method further includes:
[0017] Configure a chassis for each target printed circuit board. The front end of the target printed circuit board is a logic signal input / output interface. The rear end of the target printed circuit board is connected to the chassis through a backplane connector to obtain the power supply and diagnostic signal transmission required for each target printed circuit board. One side of the chassis is provided with an opening, and guide rails that are movably connected to the printed circuit logic board are provided on the upper and lower inner walls of the chassis.
[0018] Further, the above relay includes a relay coil, an input port, and multiple groups of output ports, where:
[0019] One end of the relay coil is connected to the negative pole of the power supply, the other end of the relay coil is connected to the negative pole of the input port, and the positive pole of the input port is connected to the positive pole of the power supply;
[0020] For each group of output ports, the output port includes output port NC, output port NO, and common terminal COM. Output port NC and the common terminal COM form a pair of normally closed contacts, output port NO and the common terminal COM form a pair of normally open contacts, and output port NC and output port NO are mutually exclusive contacts and are controlled by the energization and de-energization of the relay coil.
[0021] Further, the output ports of the above relay are two groups.
[0022] Further, the above AND, OR, and NOT logic modules include two relays. Among the two relays, the normally open contacts of one group of output ports of the two relays are connected to each other, and the output port NOs of the other group of output ports are connected to each other.
[0023] Furthermore, the above-mentioned RS flip-flop logic module is composed of 4 relays, including a first device, a second device, a third device, and a fourth device.
[0024] Furthermore, the output port NC1 of the first device is connected to the common terminal COM1 of the second device, and the common terminal COM1 of the first device is connected to the negative pole of the input port of the second device; the output port NC2 of the first device is respectively connected to the output port NO1 of the third device and the positive pole of the input port of the fourth device, and the common terminal COM2 of the first device is respectively connected to the common terminal COM1 and common terminal COM2 of the third device;
[0025] The positive pole of the input port of the second device is connected to the output port NO1 of the second device; the common terminal COM2 of the third device is connected to the output port NO2 of the fourth device, and the output port NO2 of the third device is respectively connected to the common terminal COM2 of the fourth device and the negative pole of the input port.
[0026] Advantages of the present invention: In this solution, relays are used to form various types of logic modules. When connecting relay logic modules on a printed circuit board, the type and quantity of logic modules can be selected according to functional requirements, and logic construction is carried out using the bridging method. The logic functions can be freely combined to achieve functions such as multiple inputs and multiple outputs.
[0027] In a second aspect, the present application provides the application of the AND, OR, and NOT logic modules as described in any one of the first aspects in forming a printed circuit logic board.
[0028] In a third aspect, the present application provides the application of the RS flip-flop logic module as described in any one of the first aspects in forming a printed circuit logic board.
[0029] Compared with the prior art, the present invention has at least the following beneficial effects:
[0030] In the present application, first, by using a modular design method that can form various logic modules, the problems of poor maintainability, poor flexibility, and low space utilization rate are solved, the difficulty of relay fault location and the difficulty of later maintenance are reduced, and when function expansion or change is required, it will not cause changes in the wiring or layout of the entire circuit; at the same time, when carrying out large-scale control logic design, the use of this relay effectively reduces the occupied space.
[0031] In this application, a relay in this application is constituted by a relay coil, an input port, multiple groups of output ports, etc. The relay thus constituted includes two groups of normally closed contacts and two groups of normally open contacts. One end of the relay coil is connected to the negative pole of the power supply, and the other end of the relay coil is connected to the negative pole of the input port. The positive pole of the input port is connected to the positive pole of the power supply to control whether the relay coil is energized through the input port. Finally, when controlling whether the relay coil is energized, the on / off of the two groups of normally closed contacts and the two groups of normally open contacts in the relay is controlled, ultimately realizing logical control.
[0032] In this application, the proposed modular design optimizes the disadvantages of the traditional relay logic circuit. Based on the relay with logical modularity, logical modules are built to realize the free combination of logical functions, improving the flexibility, maintainability and space utilization rate of the system.
[0033] In this application, the proposed modular design method is used to constitute various types of logical modules. When connecting the relay logic modules on the printed circuit board, the type and quantity of logical modules can be selected according to functional requirements, and logical construction is carried out by means of bridging. The logical functions can be freely combined to realize functions such as multiple inputs and multiple outputs. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not constitute a limitation to the embodiments of the present invention. In the drawings:
[0035] Figure 1 is the schematic diagram of the relay in the embodiment of the present invention;
[0036] Figure 2 is the schematic diagram of the AND, OR, NOT logic modules in the embodiment of the present invention;
[0037] Figure 3 is the schematic diagram of the RS flip-flop logic module in the embodiment of the present invention;
[0038] Figure 4 is the schematic diagram of one of the printed circuit logic boards in the embodiment of the present invention;
[0039] Figure 5 is the external shape schematic diagram of the printed circuit logic board and the chassis in the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. Components of the embodiments of the present invention usually described and illustrated in the drawings here can be arranged and designed in various different configurations.
[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.
[0042] It should be noted that: like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0043] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships in which the inventive product is customarily placed during use, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.
[0044] In addition, terms such as "horizontal", "vertical", "hanging" do not mean that the component is required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.
[0045] In the description of the embodiments of the present invention, "a plurality of" represents at least two.
[0046] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and defined, if terms such as "set", "installed", "connected", "connected" are understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0047] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to those of ordinary skill in the art that the present invention may be practiced without these specific details. In other instances, well-known structures, circuits, materials, or methods have not been specifically described to avoid obscuring aspects of the present invention.
[0048] Throughout the specification, references to "one embodiment", "an embodiment", "one example", or "an example" mean that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment of the present invention. Thus, the phrases "one embodiment", "an embodiment", "one example", or "an example" appearing throughout the specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and / or sub-combination in one or more embodiments or examples. In addition, those of ordinary skill in the art will understand that the diagrams provided herein are for illustrative purposes only and are not necessarily drawn to scale. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.
[0049] Embodiment 1:
[0050] To optimize the disadvantages of traditional relay logic circuits, this embodiment provides a logic modular design method applicable to nuclear power plants. As Figures 1-4 shown, it includes: obtaining the module type of the target logic module, determining the number of relays used to build the target logic module according to the module type, and building the target logic module with the corresponding number of relays. The target logic module includes at least AND, OR, NOT logic modules and RS flip-flop logic modules.
[0051] Optionally, as Figures 1-4 shown, the above method may further include:
[0052] obtaining the functional requirements of the target printed circuit board, determining the module type and module quantity of each target logic module in the target printed circuit board according to the integration requirements, and building multiple target logic modules of the corresponding module type and corresponding module quantity in the target printed circuit board. The multiple target logic modules are logically built using a bridging method to meet the functional requirements.
[0053] Optionally, as Figures 1-5 shown, the above method may further include:
[0054] A chassis is configured through each of the target printed circuit boards. The front end of the target printed circuit board is a logic signal input / output interface. The rear end of the target printed circuit board is connected to the chassis through a backplane connector to obtain the power supply and diagnostic signal transmission required for each target printed circuit board. One side of the chassis is provided with an opening, and guide rails for movably connecting with the printed circuit logic board cards are arranged on the upper and lower inner walls of the chassis.
[0055] Specifically, the above-mentioned relay includes a relay coil, an input port, and multiple groups of output ports. As Figure 1 shown, where:
[0056] One end of the relay coil is connected to the negative pole of the power supply, the other end of the relay coil is connected to the negative pole of the input port, and the positive pole of the input port is connected to the positive pole of the power supply.
[0057] Furthermore, for each group of output ports, the output port includes an output port NC, an output port NO, and a common terminal COM. The output port NC and the common terminal COM form a pair of normally closed contacts, the output port NO and the common terminal COM form a pair of normally open contacts, and the output port NC and the output port NO are mutually exclusive contacts, and are controlled by the energization and de-energization of the relay coil.
[0058] Optionally, the output ports of the above-mentioned relay are two groups.
[0059] Among them, the principle of a single relay is as Figure 1 shown; the input port is a dry contact, and the output is two pairs of normally open and normally closed contacts. See Figure 1 : PWR+ / PWR- is the power supply for the relay coil; the input ports IN+ / IN-, and the output ports NC1 / NO1 are mutually exclusive contacts, and their common terminal is COM1; the output ports NC2 / NO2 are mutually exclusive contacts, and their common terminal is COM2 (NC* is a normally closed contact, and NO* is a normally open contact).
[0060] Specifically, the relay in the present application is constituted by a relay coil, an input port, multiple groups of output ports, etc.; the formed relay includes two groups of normally closed contacts and two groups of normally open contacts. One end of the relay coil is connected to the negative pole of the power supply, the other end of the relay coil is connected to the negative pole of the input port, and the positive pole of the input port is connected to the positive pole of the power supply to realize controlling whether the relay coil is energized through the input port; in the case of controlling whether the relay coil is energized, the on / off of the two groups of normally closed contacts and the two groups of normally open contacts in the relay is controlled, and finally logical control is realized.
[0061] Embodiment 2:
[0062] The embodiment of the present application provides a logic module of AND, OR, and NOT, and this logic module of AND, OR, and NOT includes two relays. As Figure 1As shown, the relay includes a relay coil, an input port, and multiple groups of output ports, where:
[0063] One end of the relay coil is connected to the negative pole of the power supply, the other end of the relay coil is connected to the negative pole of the input port, and the positive pole of the input port is connected to the positive pole of the power supply.
[0064] Furthermore, for each group of output ports, the output port includes an output NC, an output NO, and a common terminal COM. The output NC and the common terminal COM form a pair of normally closed contacts, the output NO and the common terminal COM form a pair of normally open contacts, and the output NC and the output NO are mutually exclusive contacts, and are controlled by the energization and de-energization of the relay coil.
[0065] Optionally, the output ports of the above-mentioned relay are two groups.
[0066] Among them, the principle of a single relay is as Figure 1 shown; the input port is a dry contact, and the output is two pairs of normally open and normally closed contacts. See Figure 1 : PWR+ / PWR- is the power supply for the relay coil; the input ports IN+ / IN-, and the output ports NC1 / NO1 are mutually exclusive contacts, and their common terminal is COM1; the output ports NC2 / NO2 are mutually exclusive contacts, and their common terminal is COM2 (NC* is a normally closed contact, and NO* is a normally open contact).
[0067] Specifically, the relay in this application is constituted by a relay coil, an input port, and multiple groups of output ports, etc.; in the constituted relay, there are two groups of normally closed contacts and two groups of normally open contacts. One end of the relay coil is connected to the negative pole of the power supply, the other end of the relay coil is connected to the negative pole of the input port, and the positive pole of the input port is connected to the positive pole of the power supply to realize controlling whether the relay coil is energized through the input port; in the case of controlling whether the relay coil is energized, control the on-off of the two groups of normally closed contacts and two groups of normally open contacts in the relay, and finally realize logical control.
[0068] Furthermore, in the two relays of the AND, OR, and NOT logic modules, the normally open contacts of one group of output ports of the two relays are connected to each other, and the output NOs of the other group of output ports are connected to each other.
[0069] Among them, the principles of the "AND", "OR", and "NOT" relay logic modules are as Figure 2 shown; built by the two relays in Embodiment 1, see Figure 1 , in this logic module, the inputs are A and B, and non-A ( Figure 2 in ), non-B ( Figure 2 in ), and A AND B ( Figure 2in the AND), A or B ( Figure 2 the logical output function of the OR) in.
[0070] Embodiment 3:
[0071] The embodiment of the present application provides an RS flip-flop logic module, which is composed of 4 relays, as Figure 1 shown, the relay includes a relay coil, an input port and multiple groups of output ports, where:
[0072] One end of the relay coil is connected to the negative pole of the power supply, the other end of the relay coil is connected to the negative pole of the input port, and the positive pole of the input port is connected to the positive pole of the power supply.
[0073] Further, for each group of output ports, the output port includes an output NC, an output NO, and a common terminal COM. The output NC and the common terminal COM form a pair of normally closed contacts, the output NO and the common terminal COM form a pair of normally open contacts, and the output NC and the output NO are mutually exclusive contacts, and are controlled by the energization and de-energization of the relay coil.
[0074] Optionally, the output ports of the above relay are two groups.
[0075] Among them, the principle of a single relay is as Figure 1 shown; the input port is a dry contact, and the output is two pairs of normally open and normally closed contacts. See Figure 1 : PWR+ / PWR- is the power supply for the relay coil; the input ports IN+ / IN-, the output ports NC1 / NO1 are mutually exclusive contacts, and their common terminal is COM1; the output ports NC2 / NO2 are mutually exclusive contacts, and their common terminal is COM2 (NC* is a normally closed contact, NO* is a normally open contact).
[0076] Specifically, the relay in the present application is constituted by a relay coil, an input port and multiple groups of output ports, etc.; the formed relay includes two groups of normally closed contacts and two groups of normally open contacts. One end of the relay coil is connected to the negative pole of the power supply, and the other end of the relay coil is connected to the negative pole of the input port. The positive pole of the input port is connected to the positive pole of the power supply to realize controlling whether the relay coil is energized through the input port; in the case of controlling whether the relay coil is energized, the on-off of the two groups of normally closed contacts and the two groups of normally open contacts in the relay is controlled, and finally logical control is realized.
[0077] Specifically, as Figure 3 shown, among the 4 relays constituting the RS flip-flop logic module, it includes a first device ( Figure 3 Relay A) in, a second device ( Figure 3 Relay B) in, a third device ( Figure 3Relay C) and the fourth device ( Figure 3 Relay D) therein; the relay includes a relay coil, an input port, and multiple output ports.
[0078] Furthermore, the normally closed output port NC1 of the first device is connected to the common terminal COM1 of the second device, and the common terminal COM1 of the first device is connected to the negative pole of the input port of the second device; the normally closed output port NC2 of the first device is respectively connected to the normally open output port NO1 of the third device and the positive pole of the input port of the fourth device, and the common terminal COM2 of the first device is respectively connected to the common terminal COM1 and the common terminal COM2 of the third device.
[0079] Furthermore, referring to Figure 3 , the positive pole of the input port of the second device is connected to the normally open output port NO1 of the second device; the common terminal COM2 of the third device is connected to the normally open output port NO2 of the fourth device, and the normally open output port NO2 of the third device is respectively connected to the common terminal COM2 of the fourth device and the negative pole of the input port of the fourth device.
[0080] Among them, the principle of the RS flip-flop logic module is as Figure 3 shown; the RS flip-flop logic module is built by four relays to achieve the set, reset, and hold functions; specifically, in Figure 3 , S and are the set terminals, R is the reset terminal, when R and are selected as the inputs, the output is set priority (Q S ); when R and S are selected as the inputs, the output is reset priority (Q R ); the entire RS flip-flop logic does not retain power-off.
[0081] Embodiment 4:
[0082] The embodiment of the present application provides a printed circuit logic board. The printed circuit logic board is composed of AND, OR, NOT logic modules, RS flip-flop logic modules, etc., and the type and quantity of the logic modules can be selected according to functional requirements, and the logic is built by means of bridging; among them:
[0083] The AND, OR, NOT logic modules include two relays, as Figure 1 shown, the relay includes a relay coil, an input port, and multiple output ports, where: one end of the relay coil is connected to the negative pole of the power supply, the other end of the relay coil is connected to the negative pole of the input port, and the positive pole of the input port is connected to the positive pole of the power supply.
[0084] Further, for each group of output ports described above, the output ports include output port NC, output port NO, and common terminal COM. Output port NC and the common terminal COM form a pair of normally closed contacts, output port NO and the common terminal COM form a pair of normally open contacts, and output port NC and output port NO are mutually exclusive contacts, and are controlled by the energization and de-energization of the relay coil.
[0085] Optionally, the output ports of the above relay are two groups.
[0086] Among them, the principle of a single relay is as Figure 1 shown; the input port is a dry contact, and the output is two pairs of normally open and normally closed contacts. See Figure 1 : PWR+ / PWR- is the power supply for the relay coil; input ports IN+ / IN-, output ports NC1 / NO1 are mutually exclusive contacts, and their common terminal is COM1; output ports NC2 / NO2 are mutually exclusive contacts, and their common terminal is COM2 (NC* is a normally closed contact, NO* is a normally open contact).
[0087] Specifically, the relay in this application is constituted by a relay coil, an input port, and multiple groups of output ports, etc.; in the constituted relay, there are two groups of normally closed contacts and two groups of normally open contacts. One end of the relay coil is connected to the negative pole of the power supply, the other end of the relay coil is connected to the negative pole of the input port, and the positive pole of the input port is connected to the positive pole of the power supply to realize controlling whether the relay coil is energized through the input port; in the case of controlling whether the relay coil is energized, control the on-off of the two groups of normally closed contacts and two groups of normally open contacts in the relay, and finally realize logical control.
[0088] Further, in the two relays of the AND, OR, NOT logic module described above, the normally open contacts of one group of output ports of the two relays are connected to each other, and the output port NO of the other group of output ports are connected to each other.
[0089] Among them, the principles of the "AND", "OR", "NOT" relay logic modules are as Figure 2 shown; built by the two relays in Embodiment 1, see Figure 1 , in this logic module, the inputs are A and B, and the logic output functions of NOT A ( Figure 2 in ), NOT B ( Figure 2 in ), A AND B ( Figure 2 AND in Figure 2 ), A OR B (
[0090] OR in Figure 1As shown, the relay includes a relay coil, an input port, and multiple groups of output ports, where: one end of the relay coil is connected to the negative pole of the power supply, the other end of the relay coil is connected to the negative pole of the input port, and the positive pole of the input port is connected to the positive pole of the power supply.
[0091] Further, for each group of output ports, the output port includes an output NC, an output NO, and a common terminal COM. The output NC and the common terminal COM form a pair of normally closed contacts, the output NO and the common terminal COM form a pair of normally open contacts, and the output NC and the output NO are mutually exclusive contacts, and are controlled by the energization and de-energization of the relay coil.
[0092] Optionally, the output ports of the above relay are two groups.
[0093] Among them, the principle of a single relay is as Figure 1 shown; the input port is a dry contact, and the output is two pairs of normally open and normally closed contacts. See Figure 1 : PWR+ / PWR- is the power supply for the relay coil; the input ports IN+ / IN-, and the output ports NC1 / NO1 are mutually exclusive contacts, and their common terminal is COM1; the output ports NC2 / NO2 are mutually exclusive contacts, and their common terminal is COM2 (NC* is a normally closed contact, and NO* is a normally open contact).
[0094] Specifically, the relay in the present application is constituted by a relay coil, an input port, multiple groups of output ports, etc.; the constituted relay includes two groups of normally closed contacts and two groups of normally open contacts. One end of the relay coil is connected to the negative pole of the power supply, the other end of the relay coil is connected to the negative pole of the input port, and the positive pole of the input port is connected to the positive pole of the power supply to realize controlling whether the relay coil is energized through the input port; in the case of controlling whether the relay coil is energized, the on-off of the two groups of normally closed contacts and the two groups of normally open contacts in the relay is controlled, and finally logical control is realized.
[0095] Specifically, as Figure 3 shown, among the 4 relays constituting the RS flip-flop logic module, it includes a first device ( Figure 3 Relay A in Figure 3 ), a second device ( Figure 3 Relay B in Figure 3 ), a third device ( Figure 3 Relay C in Figure 3 ), and a fourth device ( Figure 3 Relay D in Figure 3 ); the relay includes a relay coil, an input port, and multiple groups of output ports.
[0096] Further, the output port NC1 of the first device is connected to the common terminal COM1 of the second device, and the common terminal COM1 of the first device is connected to the negative pole of the input port of the second device; the output port NC2 of the first device is respectively connected to the output port NO1 of the third device and the positive pole of the input port of the fourth device, and the common terminal COM2 of the first device is respectively connected to the common terminals COM1 and COM2 of the third device.
[0097] Further, referring to Figure 3 , the positive pole of the input port of the second device is connected to the output port NO1 of the second device; the common terminal COM2 of the third device is connected to the output port NO2 of the fourth device, and the output port NO2 of the third device is respectively connected to the common terminal COM2 of the fourth device and the negative pole of the input port.
[0098] Among them, the principle of the RS flip-flop logic module is as Figure 3 shown; the RS flip-flop logic module is built by four relays to realize the set, reset and hold functions; specifically, in Figure 3 , S is the set terminal and R is the reset terminal. When R and are selected as inputs, the output is set priority (QS); when R and S are selected as inputs, the output is reset priority (QR); the entire RS flip-flop logic does not retain power-off.
[0099] Among them, an example of connecting the relay logic module on the printed circuit board is as Figure 4 shown. According to the functional requirements, the type and quantity of the logic module are selected, and the logic is built by the bridging method. The logic functions can be freely combined to realize functions such as multiple inputs and multiple outputs ( Figure 4 in which IN is an external input and OUT is a logic output, Figure 4 in which each LOGIC BLOCK block is Figure 1 , OR Figure 2 , OR Figure 3 the single block shown in
[0100] Further, the above-mentioned printed circuit logic board is also equipped with a chassis. One side of the chassis is open, and the upper and lower inner walls of the chassis are provided with rails that are movably connected to the printed circuit logic board.
[0101] Among them, the printed circuit logic board and the standard chassis can be designed according to Figure 4 . The schematic of the standard chassis is as Figure 5 shown; specifically, the front end of the printed circuit logic board is a logic signal input and output interface. The rear end of the printed circuit logic board is connected to the chassis through a backplane connector to obtain the power supply and diagnostic signal transmission required by the circuit board. The printed circuit logic board is installed in the chassis through the upper and lower rails of the chassis.
[0102] Among them, in the field of nuclear power plant DCS control, the flexibility and maintainability of the current relay logic control circuit are poor. When performing large-scale logic control, the volume is huge. This application is based on modular design for logic modules, integrated on a printed circuit board, and uses a bridging method to build logic functions. The functions can be freely combined and extended, improving the disadvantages of the traditional relay logic control circuit, enhancing the flexibility and maintainability of the system, and also greatly improving the space utilization rate of the cabinet.
[0103] Embodiment 5:
[0104] The embodiment of the present application provides an application of a logic modular design method applicable to nuclear power plants in forming logic modules as described in any one of Embodiment 1.
[0105] Among them, by using relays that can form various logic modules, the problems of poor maintainability, poor flexibility, and low space utilization rate are solved, the difficulty of relay fault location and the difficulty of later maintenance are reduced, and when function expansion or change is required, it will not cause changes in the wiring or layout of the entire circuit; at the same time, when performing large-scale control logic design, the relay effectively reduces the occupied space.
[0106] Embodiment 6:
[0107] The embodiment of the present application provides an application of AND, OR, and NOT logic modules as described in any one of Embodiment 2 in forming a printed circuit logic board.
[0108] Embodiment 7:
[0109] The present application provides an application of an RS flip-flop logic module as described in any one of Embodiment 3 in forming a printed circuit logic board.
[0110] Specifically, the design of the present invention is based on the logic modularization of relays. The purpose is to modularize scattered relays in units of logic units to provide a basic platform for diverse logic instructions, which can be freely combined according to functional needs and has advantages such as flexibility, scalability, and high maintainability; it should be noted that the relays provided in the present invention and various types of logic modules composed of relays can also be used in other industrial fields other than nuclear power.
[0111] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.
[0112] In the above specific embodiments, the object, technical solution and beneficial effects of the present invention have been further described in detail. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A logical modular design method applicable to nuclear power plants, characterized in that, The method includes the following specific steps: Obtain the module type of the target logic module, determine the number of relays used to build the target logic module according to the module type, and build the target logic module by using the corresponding number of relays. The target logic module includes at least AND, OR, NOT logic modules and RS flip-flop logic modules.
2. A logic modular design method applicable to nuclear power plants according to claim 1, characterized in that The method further includes: Obtain the functional requirements of the target printed circuit board, determine the module type and the number of each target logic module in the target printed circuit board according to the integration requirements, and build a plurality of target logic modules with corresponding module types and corresponding numbers in the target printed circuit board. The plurality of target logic modules are logically built by using a bridging method to meet the functional requirements.
3. The logical modular design method applicable to nuclear power plants according to claim 2, characterized in that The method further includes: Configure a chassis for each of the target printed circuit boards. The front end of the target printed circuit board is a logic signal input / output interface, and the back end of the target printed circuit board is connected to the chassis through a backplane connector to obtain the power supply and diagnostic signal transmission required for each target printed circuit board. One side of the chassis is provided with an opening, and guide rails for movably connecting with the printed circuit logic board are arranged on the upper and lower inner walls of the chassis.
4. A logic modular design method applicable to nuclear power plants according to claim 1, characterized in that, The relay includes a relay coil, an input port and multiple groups of output ports, where: One end of the relay coil is connected to the negative pole of the power supply, the other end of the relay coil is connected to the negative pole of the input port, and the positive pole of the input port is connected to the positive pole of the power supply. For each group of output ports, the output port includes an output NC, an output NO, and a common terminal COM. The output NC and the common terminal COM form a pair of normally closed contacts, the output NO and the common terminal COM form a pair of normally open contacts, and the output NC and the output NO are mutually exclusive contacts, and are controlled by the energization and de-energization of the relay coil.
5. A logic modular design method applicable to nuclear power plants according to claim 4, characterized in that, The relay has two groups of output ports.
6. A logical modular design method applicable to nuclear power plants according to claim 1, characterized in that, The AND, OR, NOT logic module includes two of the relays. In the two relays, the normally open contacts of one group of output ports of the two relays are connected to each other, and the output NOs of the other group of output ports are connected to each other.
7. A logic modular design method applicable to nuclear power plants according to claim 1, characterized in that The RS flip-flop logic module is composed of 4 of the relays, and includes a first device, a second device, a third device, and a fourth device.
8. A logical modular design method applicable to nuclear power plants according to claim 7, characterized in that The output NC1 of the first device is connected to the common terminal COM1 of the second device, and the common terminal COM1 of the first device is connected to the negative pole of the input port of the second device; the output NC2 of the first device is respectively connected to the output NO1 of the third device and the positive pole of the input port of the fourth device, and the common terminal COM2 of the first device is respectively connected to the common terminal COM1 and the common terminal COM2 of the third device; The positive pole of the input port of the second device is connected to the output NO1 of the second device; the common terminal COM2 of the third device is connected to the output NO2 of the fourth device, and the output NO2 of the third device is respectively connected to the common terminal COM2 of the fourth device and the negative pole of the input port.
9. Application of the AND, OR, NOT logic module according to any one of claims 1-8 in forming a printed circuit logic board.
10. Application of the RS flip-flop logic module according to any one of claims 1-8 in forming a printed circuit logic board.