Electric lap joint design method and device for composite mounting plate

Abstract

The invention provides an electric lap joint design method and device for a composite material mounting plate. The method comprises the steps that the coordinate of each equipment mounting point on the composite material mounting plate is obtained; determining standby electric lap joints of all equipment; acquiring an electric lap joint area G; determining a transverse / longitudinal reference area G1; determining an electric lap joint output point Po; connecting the electric lap joint output point Po to the reference area G1 through a lead-in wire, and connecting at least one standby electric lap joint point of the equipment without the standby electric lap joint point in the reference area G1 to the reference area G1 through a lead-in wire for the equipment without the standby electric lap joint point in the reference area G1; determining a main path S and an auxiliary path in the reference area G1; and according to the main path S and the auxiliary path, arranging an electric lap joint copper bar and a lap joint point. And an electric lap joint copper bar is laid on the composite material mounting plate in a gluing mode. The copper bar is integrally provided with a plurality of equipment mounting points. Through bolts of respective devices, electric lap joint communication between the devices and the copper bar can be achieved, and then communication between the copper bar and the metal structure is achieved.

Description

Technical Field

[0001] This invention belongs to the field of aerospace functional structure design, specifically relating to a method and device for electrical overlap design of composite mounting plates. Background Technology

[0002] In helicopter structural design, there is typically an equipment platform. This platform integrates some electronic devices, each of which requires an electrical connection point to achieve a zero-point potential in the circuit. In a metal fuselage structure, each electronic device only needs to draw an electrical connection from nearby metal.

[0003] Because the equipment platform is a composite material structure and is an electrical insulator, the numerous devices installed on the platform cannot directly draw electrical connections from the platform. Each device must find a nearby metal support structure as its electrical connection point.

[0004] Even if electrical connection points could be introduced from nearby metal structures, the numerous electrical connection wires would still occupy the already congested space, increasing the difficulty of assembling and disassembling electronic equipment. Therefore, it is necessary to consider designing an electrical connection system that can accommodate the installation of equipment with this type of electrically insulating composite structure. Summary of the Invention

[0005] This invention proposes a design method and device for electrical overlap on a composite mounting plate. An electrical overlap copper strip is laid on the composite mounting plate using adhesive bonding. This copper strip integrates numerous equipment mounting points. Through bolts on the respective equipment, electrical overlap connection can be achieved between the equipment and the copper strip, thereby connecting the copper strip to the metal structure.

[0006] The first aspect of this invention provides a method for designing electrical overlap of a composite mounting plate, comprising: Step 1: Obtain the coordinates Pij = [Xij, Yij] of each device i's mounting point on the composite mounting plate, where i represents the i-th device and j represents the j-th mounting point of that device on the platform (j≥2); Step 2: Determine the backup electrical connection points for all equipment; Step 3: Connect all the spare electrical connection points together in the form of a rectangular block diagram to form a closed area, which is the electrical connection area G. Step 4: Within the electrical overlap area G, determine the horizontal / vertical reference area G1; Step 5: Based on the reference area G1, determine the electrical lap output point Po at the bolt mounting points on the edge of the composite mounting plate; Step 6: Connect the electrical connection output point Po to the reference area G1 via the lead wire. For equipment that does not have a spare electrical connection point in the reference area G1, connect at least one of its spare electrical connection points to the reference area G1 via the lead wire. Step 7: Within the reference area G1, select one horizontal / vertical line. Connect the starting point of the horizontal / vertical line to the lead-in line connecting the electrical connection output point Po, and connect the ending point to the last device at the end of the line to form the main path S; connect the remaining lead-in lines to the main path S to form the secondary path. Step 8: Arrange the electrical lap copper strips and lap points according to the main path S and the secondary path.

[0007] Optionally, identify the backup power connection points for all equipment, including: Based on the coordinates of all installation points of each device, determine the coordinates of the center of gravity of the entire device, Pa(Xa, Ya). Among all the installation points of each device, the installation point closest to the center of gravity of the entire device in the longitudinal direction is determined as the backup electrical connection point of the device.

[0008] Optionally, within the electrical bridging area G, a reference area G1 is defined, including: Based on the coordinates of all equipment backup electrical connection points, determine the centroid coordinates Pb(Xb, Yb) of the electrical connection area. Within the electrical bridging area G, select the two backup electrical bridging points that are closest to the centroid Pb(Xb, Yb) of the electrical bridging area in the longitudinal direction. Draw two horizontal lines from these two points to form a rectangular narrow band area G1.

[0009] Optionally, for equipment without a spare electrical connection point within the reference area G1, after connecting at least one of its spare electrical connections to the reference area G1 via a lead-in wire, the method further includes: The spare electrical connection points of adjacent devices located on the same side of reference area G1 are connected in series and then connected to reference area G1 through a lead-in line to shorten the length of the lead-in line.

[0010] Optionally, for equipment without a spare electrical connection point within the reference area G1, after connecting at least one of its spare electrical connections to the reference area G1 via a lead-in wire, the method further includes: For equipment with multiple backup electrical connection points within the reference area G1, reduce the number of backup electrical connection points connected to the reference area G1 without increasing the length of the lead wire.

[0011] A second aspect of the present invention provides a composite mounting plate electrical overlap design device, comprising: The coordinate acquisition module is used to obtain the coordinates Pij=[Xij, Yij] of each device i's mounting point on the composite mounting plate, where i represents the i-th device and j represents the j-th mounting point of that device on the platform (j≥2); Backup power connection point determination module, used to determine the backup power connection point for all equipment; The electrical connection area acquisition module is used to connect all the spare electrical connection points in the form of a rectangular block diagram to form a closed area, thus obtaining the electrical connection area G. The reference area acquisition module is used to determine the lateral / longitudinal reference area G1 within the electrical overlap area G; The electrical lap joint output point acquisition module is used to determine the electrical lap joint output point Po in the bolt mounting points on the edge of the composite mounting plate based on the reference area G1. The module is used to connect the electrical connection output point Po to the reference area G1 via the lead wire. For equipment that does not have a spare electrical connection point in the reference area G1, at least one of its spare electrical connection points is connected to the reference area G1 via the lead wire. The path generation module is used to select one horizontal / vertical line within the reference area G1. The starting point of the horizontal / vertical line is connected to the lead-in line of the electrical lap output point Po, and the ending point is connected to the last device at the end of the line to form the main path S. The remaining lead-in lines are connected to the main path S to form the secondary path. The layout module is used to arrange the electrical lap copper strips and lap points according to the main path S and the secondary path.

[0012] Optionally, the backup electrical contact point determination module is specifically used for: Based on the coordinates of all installation points of each device, determine the coordinates of the center of gravity of the entire device, Pa(Xa, Ya). Among all the installation points of each device, the installation point closest to the center of gravity of the entire device in the longitudinal direction is determined as the backup electrical connection point of the device.

[0013] Optionally, the reference area acquisition module is specifically used for: Based on the coordinates of all equipment backup electrical connection points, determine the centroid coordinates Pb(Xb, Yb) of the electrical connection area. Within the electrical bridging area G, select the two backup electrical bridging points that are closest to the centroid Pb(Xb, Yb) of the electrical bridging area in the longitudinal direction. Draw two horizontal lines from these two points to form a rectangular narrow band area G1.

[0014] Optionally, the imported module is also used for: The spare electrical connection points of adjacent devices located on the same side of reference area G1 are connected in series and then connected to reference area G1 through a lead-in line to shorten the length of the lead-in line.

[0015] Optionally, the imported module is also used for: For equipment with multiple backup electrical connection points within the reference area G1, reduce the number of backup electrical connection points connected to the reference area G1 without increasing the length of the lead wire.

[0016] This invention proposes a design method and apparatus for electrical overlap on composite mounting plates, and provides a design method for laying electrical overlap copper strips on composite electrically insulating mounting plates. It provides a design method for electrical overlap copper strips and establishes design specifications for electrical overlap copper strips. This simplifies the electrical overlap installation connection, eliminating the need to introduce electrical overlap copper strips for each device on the composite plate. The laying of the copper strips does not affect the installation of the equipment. Simultaneously, the weight of the electrical overlap is correspondingly reduced. This composite mounting plate electrical overlap design method is suitable for application in the structural installation design of helicopter electronic equipment platforms. Currently, it has been implemented on unmanned helicopter models with good practical results. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the composite material mounting plate equipment layout in the design method of this invention; Figure 2 This is a schematic diagram of the arrangement of spare electrical connection points and electrical connection areas of the composite mounting plate in the design method of this invention; Figure 3 This is a schematic diagram showing the layout of the output points and main path reference area of ​​the composite material mounting plate equipment in the design method of this invention; Figure 4 This is a schematic diagram of the layout of the composite material mounting plate equipment lead-in line in the design method of this invention; Figure 5 This is a schematic diagram of the main / secondary path layout of the composite material mounting plate equipment in the design method of this invention; Figure 6 This is a schematic diagram of the electrical lap copper strip arrangement in the design method of this invention; Figure 7 This is a schematic diagram of the electrical lap copper strip specification design in the design method of this invention; Figure 8 This is a schematic diagram of the electrical connection point of the equipment in the design method of this invention; Figure 9 This is a schematic diagram of the electrical connection output terminal in the design method of this invention; Figure 10 This is a schematic diagram of the double-galvanized lapped copper strip connection in the design method of this invention; Figure 11 This is a flowchart of the electrical overlap design method for the composite mounting plate of the present invention. Detailed Implementation

[0018] like Figure 1-11 As shown, the present invention provides a method and apparatus for designing electrical overlap of composite mounting plates. The method includes: Step 1: Obtain the coordinates Pij = [Xij, Yij] of each device i's mounting point on the composite mounting plate, where i represents the i-th device and j represents the j-th mounting point of that device on the platform (j≥2); Step 2: Determine the backup electrical connection points for all equipment; Step 3: Connect all the spare electrical connection points together in the form of a rectangular block diagram to form a closed area, which is the electrical connection area G. Step 4: Within the electrical overlap area G, determine the horizontal / vertical reference area G1; Step 5: Based on the reference area G1, determine the electrical lap output point Po at the bolt mounting points on the edge of the composite mounting plate; Step 6: Connect the electrical connection output point Po to the reference area G1 via the lead wire. For equipment that does not have a spare electrical connection point in the reference area G1, connect at least one of its spare electrical connection points to the reference area G1 via the lead wire. Step 7: Within the reference area G1, select one horizontal / vertical line. Connect the starting point of the horizontal / vertical line to the lead-in line connecting the electrical connection output point Po, and connect the ending point to the last device at the end of the line to form the main path S; connect the remaining lead-in lines to the main path S to form the secondary path. Step 8: Arrange the electrical lap copper strips and lap points according to the main path S and the secondary path.

[0019] Optionally, identify the backup power connection points for all equipment, including: Based on the coordinates of all installation points of each device, determine the coordinates of the center of gravity of the entire device, Pa(Xa, Ya). Among all the installation points of each device, the installation point closest to the center of gravity of the entire device in the longitudinal direction is determined as the backup electrical connection point of the device.

[0020] Optionally, within the electrical bridging area G, a reference area G1 is defined, including: Based on the coordinates of all equipment backup electrical connection points, determine the centroid coordinates Pb(Xb, Yb) of the electrical connection area. Within the electrical bridging area G, select the two backup electrical bridging points that are closest to the centroid Pb(Xb, Yb) of the electrical bridging area in the longitudinal direction. Draw two horizontal lines from these two points to form a rectangular narrow band area G1.

[0021] Optionally, for equipment without a spare electrical connection point within the reference area G1, after connecting at least one of its spare electrical connections to the reference area G1 via a lead-in wire, the method further includes: The spare electrical connection points of adjacent devices located on the same side of reference area G1 are connected in series and then connected to reference area G1 through a lead-in line to shorten the length of the lead-in line.

[0022] Optionally, for equipment without a spare electrical connection point within the reference area G1, after connecting at least one of its spare electrical connections to the reference area G1 via a lead-in wire, the method further includes: For equipment with multiple backup electrical connection points within the reference area G1, reduce the number of backup electrical connection points connected to the reference area G1 without increasing the length of the lead wire.

[0023] For example, the present invention provides a method for electrical overlap design of composite mounting plates, the steps of which are as follows: Arrangement of the first equipment location In a 3D digital modeling environment, various devices are placed on or below the equipment platform according to the overall weight center of gravity arrangement principle and maintenance and usage requirements. Gaps are left between the devices to facilitate disassembly and assembly for later maintenance. The coordinates of each device's installation point on the equipment platform are Pij = [Xij, Yij], where i represents the i-th device and j represents the j-th installation point of that device on the platform (j≥2). Figure 1 As shown. The mounting points are bolt mounting points, which facilitate the assembly and disassembly of the equipment.

[0024] Determination of the second electrical connection output point Because there is a set of bolts around the edge of the equipment platform, which connects the platform to the metal part of the machine body structure, the bolt mounting point closest to the machine body structure can be selected as the electrical lap output point Po, with coordinates [Xo, Yo], depending on the equipment platform installation environment. Figure 1 As shown.

[0025] Third-party electrical lap joint copper strip and lap joint specification design The cross-section of the electrical lap copper strip is set to 20mm × 0.2mm, and its busbar path runs horizontally and vertically on the mounting surface. Its advantages are convenient manufacturing and cutting, and its placement on the equipment platform does not affect the installation of the equipment. Even if the copper strip is obscured by the equipment during maintenance, its direction and the electrical lap points of the equipment can still be known.

[0026] The main copper strip path S starts from the electrical connection output point Po and extends along the X direction (allowing a turn to the Y direction and then back to the X direction), passing through multiple sets of equipment mounting points. The main path S should be close to the mounting point of each device, passing through at least one mounting point of each device whenever possible. For example, point A of device 2... Figure 2 As shown. Each device has only one electrical connection point. If the main path S cannot meet the crossing conditions, a secondary path L is drawn from the main path S and connected to the device's installation point (the closest to the main path S) as the electrical connection point. The electrical connection point of the main path S is a point on the busbar path, and its electrical connection copper strip edge distance is 10mm, as shown. Figure 3 As shown. All electrical contact points that deviate from the main path are points on the secondary path.

[0027] The distance between the end electrical contact point of all paths and the end of the copper strip is 10mm. When the main path S is set, the route from the output point to the end electrical contact point is stepped. The electrical contact copper strip on each device platform mounting surface contains one main path and at least one secondary path.

[0028] Design n electrical lap copper strips based on the number n mounting surfaces of the equipment platform. If there are 3 composite equipment platforms, and each platform has equipment requiring electrical lap installed on both its top and bottom surfaces, then there are a total of 6 equipment mounting surfaces, requiring 6 electrical lap copper strips. Each equipment has one electrical lap point, and each electrical lap copper strip requires one electrical lap output point.

[0029] Each electrical lap joint has a round hole drilled in the copper strip, with round holes of diameters of 4.2, 5.2, and 6.2 mm respectively for M4, M5, and M6 bolts of different diameters.

[0030] Fourth electrical lap copper strip installation design On the composite equipment board, according to the equipment installation point, insert M4, M5, and M6 inserts for bolts of different diameters respectively. The electrical lap copper strip is laid on the composite panel according to the corresponding electrical lap position. The two are adhered together with EA9396. After adhesion, the copper strip and the surface of the composite panel are sprayed with a layer of primer.

[0031] Before installing the bolts, the surface of the electrical contact points on the copper strip needs to be primed with a sanding process, covering a circular area with a diameter of 18mm. The corresponding equipment connection leads need to be made conductive. The equipment electrical contact bolts should be installed as follows: Figure 4 As shown.

[0032] All metal connection areas corresponding to the electrical bridging output terminal Po need to be polished, and its connection to the body structure is as follows: Figure 5 As shown.

[0033] The upper and lower copper strips on the same equipment platform can be overlapped at one point and connected using self-locking nuts, washers, and bolt assemblies. Electrical bonding and polishing should then be performed to create electrical continuity between the upper and lower copper strips. Figure 6 As shown.

[0034] This invention simplifies electrical overlap mounting connections, eliminating the need to introduce electrical overlap copper strips for each device on the composite board. The laying of the copper strips does not affect the installation of the equipment. Simultaneously, the weight of the electrical overlap is reduced accordingly. This electrical overlap design method for composite mounting boards is suitable for structural installation design of helicopter electronic equipment platforms. Currently, it has been implemented on unmanned helicopter models with good practical results.

Claims

1. A method for designing electrical overlap of a composite mounting plate, characterized in that... ,include: Step 1: Obtain the coordinates Pij = [Xij, Yij] of each device i's mounting point on the composite mounting plate, where i represents the i-th device and j represents the j-th mounting point of that device on the platform (j≥2); Step 2: Determine the backup electrical connection points for all equipment; Step 3: Connect all the spare electrical connection points together in the form of a rectangular block diagram to form a closed area, which is the electrical connection area G. Step 4: Within the electrical overlap area G, determine the horizontal / vertical reference area G1; Step 5: Based on the reference area G1, determine the electrical lap output point Po at the bolt mounting points on the edge of the composite mounting plate; Step 6: Connect the electrical connection output point Po to the reference area G1 via the lead wire. For equipment that does not have a spare electrical connection point in the reference area G1, connect at least one of its spare electrical connection points to the reference area G1 via the lead wire. Step 7: Within the reference area G1, select one horizontal / vertical line. Connect the starting point of the horizontal / vertical line to the lead-in line connecting the electrical connection output point Po, and connect the ending point to the last device at the end of the line to form the main path S; connect the remaining lead-in lines to the main path S to form the secondary path. Step 8: Arrange the electrical lap copper strips and lap points according to the main path S and the secondary path.

2. The composite mounting plate electrical overlap design method according to claim 1, characterized in that... Identify the backup electrical connection points for all equipment, including: Based on the coordinates of all installation points of each device, determine the coordinates of the center of gravity of the entire device, Pa(Xa, Ya). Among all the installation points of each device, the installation point closest to the center of gravity of the entire device in the longitudinal direction is determined as the backup electrical connection point of the device.

3. The composite mounting plate electrical overlap design method according to claim 1, characterized in that... Within the electrical bridging area G, a reference area G1 is defined, including: Based on the coordinates of all equipment backup electrical connection points, determine the centroid coordinates Pb(Xb, Yb) of the electrical connection area. Within the electrical bridging area G, select the two backup electrical bridging points that are closest to the centroid Pb(Xb, Yb) of the electrical bridging area in the longitudinal direction. Draw two horizontal lines from these two points to form a rectangular narrow band area G1.

4. The composite mounting plate electrical overlap design method according to claim 1, characterized in that... For equipment without a spare electrical connection point within the reference area G1, after connecting at least one of its spare electrical connections to the reference area G1 via a lead-in wire, the method further includes: The spare electrical connection points of adjacent devices located on the same side of reference area G1 are connected in series and then connected to reference area G1 through a lead-in line to shorten the length of the lead-in line.

5. The composite mounting plate electrical overlap design method according to claim 1, characterized in that... For equipment without a spare electrical connection point within the reference area G1, after connecting at least one of its spare electrical connections to the reference area G1 via a lead-in wire, the method further includes: For equipment with multiple backup electrical connection points within the reference area G1, reduce the number of backup electrical connection points connected to the reference area G1 without increasing the length of the lead wire.

6. A composite mounting plate electrical overlap design device, characterized in that... ,include: The coordinate acquisition module is used to obtain the coordinates Pij=[Xij, Yij] of each device i's mounting point on the composite mounting plate, where i represents the i-th device and j represents the j-th mounting point of that device on the platform (j≥2); Backup power connection point determination module, used to determine the backup power connection point for all equipment; The electrical connection area acquisition module is used to connect all the spare electrical connection points in the form of a rectangular block diagram to form a closed area, thus obtaining the electrical connection area G. The reference area acquisition module is used to determine the lateral / longitudinal reference area G1 within the electrical lap area G; The electrical lap joint output point acquisition module is used to determine the electrical lap joint output point Po in the bolt mounting points on the edge of the composite mounting plate based on the reference area G1. The module is used to connect the electrical connection output point Po to the reference area G1 via the lead wire. For equipment that does not have a spare electrical connection point in the reference area G1, at least one of its spare electrical connection points is connected to the reference area G1 via the lead wire. The path generation module is used to select one horizontal / vertical line within the reference area G1. The starting point of the horizontal / vertical line is connected to the lead-in line of the electrical lap output point Po, and the ending point is connected to the last device at the end of the line to form the main path S. The remaining lead-in lines are connected to the main path S to form a secondary path; The layout module is used to arrange the electrical lap copper strips and lap points according to the main path S and the secondary path.

7. The composite mounting plate electrical overlap design device according to claim 6, characterized in that... The backup electrical connection point determination module is specifically used for: Based on the coordinates of all installation points of each device, determine the coordinates of the center of gravity of the entire device, Pa(Xa, Ya). Among all the installation points of each device, the installation point closest to the center of gravity of the entire device in the longitudinal direction is determined as the backup electrical connection point of the device.

8. The composite mounting plate electrical overlap design device according to claim 6, characterized in that... The reference area acquisition module is specifically used for: Based on the coordinates of all equipment backup electrical connection points, determine the centroid coordinates Pb(Xb, Yb) of the electrical connection area. Within the electrical bridging area G, select the two backup electrical bridging points that are closest to the centroid Pb(Xb, Yb) of the electrical bridging area in the longitudinal direction. Draw two horizontal lines from these two points to form a rectangular narrow band area G1.

9. The composite mounting plate electrical overlap design device according to claim 6, characterized in that... The module is also used for: The spare electrical connection points of adjacent devices located on the same side of reference area G1 are connected in series and then connected to reference area G1 through a lead-in line to shorten the length of the lead-in line.

10. The composite mounting plate electrical overlap design device according to claim 6, characterized in that... The module is also used for: For equipment with multiple backup electrical connection points within the reference area G1, reduce the number of backup electrical connection points connected to the reference area G1 without increasing the length of the lead wire.

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