Vehicle electrical equipment arrangement electromagnetic compatibility checking method and system and storage medium thereof

Abstract

The invention provides a vehicle electrical equipment arrangement electromagnetic compatibility checking method and system and a storage medium, and the method comprises the following steps: recognizing the relative position between vehicle electrical equipment and the electromagnetic compatibility characteristics and types of the vehicle electrical equipment; determining the arrangement principle of the surrounding vehicle electrical equipment according to the electromagnetic compatibility characteristic and type of each vehicle electrical equipment; according to the principle of movement minimization, the positions of the vehicle electrical devices around each vehicle electrical device are adjusted, so that all the vehicle electrical devices meet the corresponding arrangement principle. According to the method, the electromagnetic compatibility interference problem possibly occurring in the arrangement of the electrical equipment can be identified in the design stage, the electromagnetic compatibility performance of the whole vehicle is optimized, and the cost and development period prolonging caused by problems occurring after subsequent vehicle loading are avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile design, and in particular relates to a method and system for verifying electromagnetic compatibility of vehicle electrical equipment layout and a storage medium thereof. Background Art

[0002] With the development of automobile electronics, there are more and more electrical devices inside the car. These devices will generate electromagnetic radiation when working, thus affecting the normal operation of other devices, and may also be affected by the external electromagnetic environment. In order to solve this problem, electromagnetic compatibility technology came into being. It analyzes the electromagnetic characteristics of the equipment, predicts and controls the behavior of the equipment in the electromagnetic environment to ensure the normal operation of the equipment. With the increasing degree of automobile electronics and intelligence, the electromagnetic compatibility problem of vehicles is becoming increasingly severe. The traditional electromagnetic compatibility judgment method is mainly based on experiments, and the experimental results are used to determine whether the electromagnetic compatibility performance of the whole vehicle meets the standards. However, there are some problems with the existing electromagnetic compatibility judgment method. First, this method is carried out after the layout design of the whole vehicle has been completed and the vehicle has been assembled, which means that once a problem is found, there is little room for modification and the cost is high. Secondly, this method finds the problem late, which may delay the product development cycle. Therefore, how to identify the electromagnetic compatibility interference problems that may occur in the layout of electrical equipment in the design stage is an important challenge facing the current vehicle electromagnetic compatibility technology. Summary of the invention

[0003] The purpose of the present invention is to address the deficiencies of the above-mentioned background technology and to provide a method, system and storage medium for verifying the electromagnetic compatibility of vehicle electrical equipment layout, which can identify electromagnetic compatibility interference problems that may occur in the layout of electrical equipment during the design stage, optimize the electromagnetic compatibility performance of the entire vehicle, and avoid the cost and extension of the development cycle caused by subsequent problems after installation.

[0004] The technical solution adopted by the present invention is: a method for verifying the electromagnetic compatibility of vehicle electrical equipment layout, comprising the following steps:

[0005] Identify the relative positions of vehicle electrical equipment and the electromagnetic compatibility characteristics and types of vehicle electrical equipment;

[0006] Determine the layout principles of the surrounding vehicle electrical equipment based on the electromagnetic compatibility characteristics and types of each vehicle electrical equipment;

[0007] Based on the principle of minimizing movement, the positions of the surrounding vehicle electrical equipment of each vehicle electrical equipment are adjusted so that all vehicle electrical equipment meet their corresponding layout principles.

[0008] In the above technical solution, the process of identifying the relative positions between vehicle electrical equipment includes: identifying the position of each vehicle electrical equipment in the vehicle space according to the vehicle design 3D data.

[0009] In the above technical solution, the process of identifying the electromagnetic compatibility characteristics and types of vehicle electrical equipment includes: determining the vehicle electrical equipment used and its corresponding type based on the 3D data of the whole vehicle design; determining its electromagnetic compatibility characteristics based on the type of the vehicle electrical equipment.

[0010] In the above technical solution, the types of vehicle electrical equipment include: controller type, radio frequency type, antenna receiving and transmitting type, motor and motor controller type, high and low voltage wiring harness, shielded wiring harness, camera- and radar-based automatic driving control equipment type; the electromagnetic compatibility characteristics include: interference source type and sensitive body type.

[0011] In the above technical scheme, the layout principle of sensitive vehicle electrical equipment is as follows: within the sphere of a set radius with the vehicle electrical equipment as the center, there is no interference source type vehicle electrical equipment; within the set straight line range of the routing of the vehicle electrical equipment, there is no vehicle electrical equipment whose operating current exceeds the set threshold value; and in other wiring harnesses co-linear with the vehicle electrical equipment, there is no vehicle electrical equipment whose current change exceeds the set threshold value or is an interference source type.

[0012] In the above technical solution, the layout principle of controller-type vehicle electrical equipment is: there is no motor-type vehicle electrical equipment or high-voltage wiring harness within the range of a sphere with a set radius as the center of the vehicle electrical equipment.

[0013] In the above technical solution, the layout principles of vehicle electrical equipment such as motors and motor controllers are as follows: the distance between the motor and the motor controller exceeds the set value; the motor uses a shielded casing and has a grounding wire, and the grounding impedance of the grounding point meets the set requirements.

[0014] In the above technical solution, the layout principles of high and low voltage wiring harnesses are: the distance between the high voltage line and the low voltage line exceeds the set threshold; the high voltage line and the low voltage line are preferably arranged vertically. If the vertical arrangement does not meet the layout principles of other vehicle electrical equipment, the high voltage line and the low voltage line adopt other layout methods but avoid parallel routing and the wiring harness needs to use shielded wires and twisted pair wires.

[0015] In the above technical solution, the layout principle of the shielded wiring harness is: the shielded wiring harness is connected in a 360° loop; the grounding impedance of the shielded wiring harness reaches a set value; and the CAN line in the shielded wiring harness is arranged in a twisted pair.

[0016] In the above technical scheme, the layout principles of radio frequency and antenna receiving and transmitting vehicle electrical equipment are as follows: the front, rear, left, right, top and bottom surfaces of the antenna are not blocked by metal; there is no interference source type vehicle electrical equipment within the range of a sphere with a set radius centered on the antenna; the antenna cable is shielded, and there is no wiring harness or interference source type vehicle electrical equipment with a current value exceeding the set value within the set range of the antenna's cabin penetration position.

[0017] In the above technical scheme, the layout principles of vehicle electrical equipment such as automatic driving control equipment based on cameras and radars are as follows: the wiring distance of the wiring harness is minimized, the number of cabin penetrations is minimized, and the plug loss of the connector is minimized; and there is no vehicle electrical equipment that is an interference source within the range of a sphere with a set radius as the center of the vehicle electrical equipment.

[0018] In the above technical solution, the type of electronic module to which the vehicle electrical equipment belongs or on which the transmission path acts is determined based on the physical electrical characteristics of the vehicle electrical equipment, and its electromagnetic compatibility characteristics are determined based on the corresponding electronic module: active electronic modules are interference sources or sensitive bodies; motors are interference sources; passive electronic modules are sensitive bodies; and inductive components are interference sources.

[0019] The present invention also provides a vehicle electrical equipment layout electromagnetic compatibility verification system, comprising: a drawing import module, an equipment identification module, a layout principle determination module, an electromagnetic compatibility verification module and a drawing output module;

[0020] The drawing import module is used to import the 3D data of vehicle design;

[0021] The device identification module is used to identify the relative positions between the vehicle electrical devices and the electromagnetic compatibility characteristics and types of the vehicle electrical devices according to the device identification module;

[0022] The arrangement principle determination module is used to determine the arrangement principle of the surrounding vehicle electrical equipment according to the electromagnetic compatibility characteristics and types of each vehicle electrical equipment;

[0023] The electromagnetic compatibility verification module is used to adjust the positions of the surrounding vehicle electrical equipment of each vehicle electrical equipment based on the principle of minimizing movement, so that all vehicle electrical equipments meet the corresponding layout principles with each other;

[0024] The drawing output module is used to output the 3D data of the vehicle design after adjusting the layout position.

[0025] The present invention also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the electromagnetic compatibility verification method for the arrangement of electrical equipment in a vehicle described in the above technical solution is implemented.

[0026] The present invention also provides an electronic device, comprising: a memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the electromagnetic compatibility verification method for the arrangement of vehicle electrical equipment as described in the above technical solution by executing the computer instructions.

[0027] The beneficial effects of the present invention are as follows: the present invention can identify electromagnetic compatibility interference problems in advance, by identifying electromagnetic compatibility interference problems that may occur in the layout of electrical equipment in the design stage, rather than after the layout design of the whole vehicle has been completed and the vehicle has been assembled, so that problems can be discovered and solved earlier, avoiding the problem of high cost due to small modification space. The present invention can also optimize the electromagnetic compatibility performance of the whole vehicle. By detailed confirmation of the electrical characteristics and electromagnetic compatibility characteristics of the electrical equipment of the whole vehicle, and verification of the design data of the whole vehicle, the behavior of the equipment in the electromagnetic environment can be more accurately predicted and controlled, thereby optimizing the electromagnetic compatibility performance of the whole vehicle and improving the stability and reliability of the vehicle. The present invention shortens the product development cycle. Since electromagnetic compatibility interference problems can be identified in the design stage, the problems can be solved earlier, thereby shortening the product development cycle and improving production efficiency.

[0028] Furthermore, the present invention performs electromagnetic compatibility verification on the whole vehicle layout through the whole vehicle 3D design drawings, and identifies the whole vehicle layout through the whole vehicle 3D design drawings, which can accurately reflect the layout status of the whole vehicle and ensure the effectiveness of the verification process.

[0029] Furthermore, after obtaining the whole vehicle equipment through the whole vehicle 3D design drawings, the present invention identifies the electromagnetic compatibility properties according to the recorded equipment types, thereby improving the verification efficiency while ensuring the verification accuracy.

[0030] Furthermore, the vehicle electrical equipment specifically calibrated in the present invention fully considers the electromagnetic state of the entire vehicle during actual application, thereby ensuring the accuracy of the calibration results.

[0031] Furthermore, the present invention calibrates sensitive vehicle electrical equipment to ensure that it is not subject to electromagnetic interference, thereby improving product quality.

[0032] Furthermore, the present invention formulates and verifies layout principles for controller-type, radio frequency-type, antenna receiving and transmitting-type, motor and motor controller-type, high and low voltage wiring harnesses, shielded wiring harnesses, camera- and radar-based automatic driving control equipment-type, and sensitive-type vehicle electrical equipment, fully considers the working requirements of equipment with different electrical characteristics and electromagnetic compatibility characteristics, and isolates interference sources and sensitive objects, thereby effectively reducing electromagnetic interference and improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1It is a schematic diagram of the method flow of the present invention;

[0034] Figure 2 Schematic diagram of the system architecture of the present invention. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not constitute a limitation on the present invention.

[0036] Example 1

[0037] like Figure 1 As shown, the present invention provides a method for verifying the electromagnetic compatibility of vehicle electrical equipment layout, comprising the following steps:

[0038] Identify the relative positions of vehicle electrical equipment and the electromagnetic compatibility characteristics and types of vehicle electrical equipment;

[0039] Determine the layout principles of the surrounding vehicle electrical equipment based on the electromagnetic compatibility characteristics and types of each vehicle electrical equipment;

[0040] Based on the principle of minimizing movement, the positions of the surrounding vehicle electrical equipment of each vehicle electrical equipment are adjusted so that all vehicle electrical equipment meet their corresponding layout principles.

[0041] Specifically, before the electromagnetic compatibility verification method for the vehicle electrical equipment layout is executed, the vehicle design 3D data is first obtained and imported, and then the vehicle electrical equipment used and its corresponding type are determined based on the vehicle design 3D data; and the electromagnetic compatibility characteristics of the vehicle electrical equipment are determined based on the type of the vehicle electrical equipment.

[0042] After the electromagnetic compatibility verification method for the vehicle electrical equipment layout is completed, the adjusted vehicle design 3D data is output as the verified vehicle design 3D data for subsequent design and production links.

[0043] The types of vehicle electrical equipment include: controllers, radio frequencies, antenna reception and transmission, motors and motor controllers, high and low voltage wiring harnesses, shielded wiring harnesses, and camera- and radar-based automatic driving control equipment; the electromagnetic compatibility characteristics include: interference sources and sensitive bodies.

[0044] Preferably, the process of identifying the electromagnetic compatibility characteristics and types of vehicle electrical equipment specifically includes: obtaining a list of vehicle equipment based on the 3D data of the vehicle design. The list of vehicle equipment includes equipment such as body systems, electrical systems, new energy systems, and chassis systems. The list of vehicle electrical equipment is screened out based on the information in the power consumption information table of each profession. The list of vehicle electrical equipment covers all energized parts and equipment, namely vehicle electrical equipment, which are also parts and equipment objects for electromagnetic compatibility control. According to the physical electrical characteristics of the parts and equipment, its electromagnetic compatibility characteristics are clarified. From the perspective of physical electrical characteristics, the classification includes controllers, radio frequency, antenna receiving and transmitting, motors and motor controllers, high and low voltage wiring harnesses, shielded wiring harnesses, and automatic driving control equipment based on cameras and radars. From the perspective of electromagnetic compatibility, the classification includes interference sources, sensitive bodies, and both interference sources and sensitive bodies.

[0045] Furthermore, the type of electronic module to which the vehicle electrical equipment belongs or on which the transmission path acts is determined based on the physical electrical characteristics of the equipment, and its electromagnetic compatibility characteristics are determined based on the corresponding electronic module: active electronic modules are interference sources or sensitive bodies; motors are interference sources; passive electronic modules are sensitive bodies; and inductive components are interference sources.

[0046] Specifically, the main method of electromagnetic compatibility characteristic classification is to confirm which electronic module it belongs to based on the physical and electrical characteristics of the parts and equipment. Common electronic modules include active electronic modules, which generally belong to the controller category, radio frequency category, and antenna receiving and transmitting category. They may be interference sources or sensitive bodies, and are classified into Class A, Class AS, Class AM, Class AX, Class AY, and Class AW; motors, which generally belong to interference sources, include Class BM and Class EM; passive electronic modules of Class P, which generally belong to sensitive bodies; and inductive components of Class R, which generally belong to interference sources.

[0047] High and low voltage wiring harnesses and shielded wiring harnesses serve as the transmission paths of the above-mentioned electronic modules: the high voltage wiring harness mainly transmits interference sources, so the high voltage wiring harness is an interference source type device; the low voltage wiring harness mainly transmits sensitive bodies, so the low voltage wiring harness is a sensitive body type device; the shielded wiring harness mainly has the dual functions of shielding external interference and reducing external interference, and acts on equipment that is both an interference source and a sensitive body, so the shielded wiring harness is both an interference source and a sensitive body type device.

[0048] Active electronic modules:

[0049] A: Electrical modules containing active electronic devices, including but not limited to analog operational amplifier circuits, switching power supplies, microprocessors and displays contained in the modules.

[0050] AS: An electrical module that regulates the power supply through other modules. This type of component refers to a sensor that provides input signals to the controller.

[0051] AM: An electrical module that contains magnetically sensitive components or is connected to external magnetically sensitive components.

[0052] AX: An electronic module with an inductive device connected internally or externally, including but not limited to a brushed DC motor, an electronically regulated motor or a solenoid valve.

[0053] AY: Electronic module containing magnetically controlled relays.

[0054] AW: Electronic modules that are not connected to external wiring harnesses, including but not limited to remote control keys, smart keys, TPMS sensors, etc.

[0055] Autonomous driving control equipment is both a source of interference and a sensitive object.

[0056] Motor:

[0057] BM: Brush commutated DC motor.

[0058] EM: Electronically controlled motor.

[0059] Passive electronic modules:

[0060] P: Electronic components composed of passive devices, such as resistors, capacitors, inductors, protection or clamping diodes, light-emitting diodes (LEDs) and thermistors.

[0061] Inductive components:

[0062] R: relays, solenoid coils, solenoid valves and horns

[0063] Specifically, the process of identifying the relative positions of the vehicle electrical devices includes: identifying the position of each vehicle electrical device in the vehicle space according to the vehicle design 3D data.

[0064] Preferably, the process of identifying the relative positions between the vehicle electrical devices specifically includes:

[0065] Obtain the 3D data of the vehicle design and distinguish them according to the spatial layout of the engine compartment, passenger compartment, luggage compartment, and wheel hub. Classify all parts and equipment in the vehicle's electrical equipment list according to their layout positions in the 3D data. For example, taking a pure electric vehicle as an example, the engine compartment generally contains the following parts and equipment: low-speed warning sound controller, washing system, brake system control unit, power system control unit, air-conditioning compressor, fan motor assembly, electric water pump assembly, wiper transmission assembly, electric drive assembly, etc., so as to clarify the vehicle electrical equipment in each spatial layout position, and then check the layout of the vehicle electrical equipment one by one according to the electromagnetic compatibility characteristics of the identified electrical equipment.

[0066] The specific verification method layout includes verification of sensitive sources; verification of controllers; verification of motors and motor controllers; verification of high and low voltage wiring harnesses; verification of shielded wiring harnesses; verification of equipment with antenna transmission and reception; and verification of automatic driving controllers for cameras and radars. The verification process is to adjust the layout of the surrounding equipment according to the corresponding layout principles of the vehicle electrical equipment to meet the requirements of its layout principles. All the following verification processes can be carried out simultaneously, without a specific order.

[0067] Specifically, the layout principle of sensitive vehicle electrical equipment is as follows: there is no interference source type vehicle electrical equipment within the sphere of a set radius with the vehicle electrical equipment as the center; there is no vehicle electrical equipment whose operating current exceeds the set threshold value within the set straight line range of the routing of the vehicle electrical equipment; there is no vehicle electrical equipment whose current change exceeds the set threshold value or is an interference source type in other wiring harnesses co-linear with the vehicle electrical equipment.

[0068] Preferably, sensitive electrical equipment must be kept away from major interference sources. The verification process includes the corresponding part itself. With the part as the center, a 200mm sphere is drawn to record all electrical equipment within the sphere. The electromagnetic compatibility characteristics of the electrical equipment within the sphere are checked one by one. If the electrical equipment within the sphere belongs to the category of strong interference sources, the position of the electrical equipment needs to be adjusted to ensure that the position falls outside the sphere. On the other hand, it is necessary to verify the wiring harness routing of sensitive electrical equipment to verify whether there are high-current devices within 200mm of the routing position, or whether there are devices with large current changes and strong interference in other co-linear harnesses. If so, the position of the device needs to be adjusted to 200mm outside the routing position.

[0069] Specifically, the layout principle of controller-type vehicle electrical equipment is: there is no motor-type vehicle electrical equipment or high-voltage wiring harness within a sphere with a set radius as the center of the vehicle electrical equipment.

[0070] Preferably, controller-type electrical equipment is both an interference source and a sensitive source, and should be isolated from other electrical devices. The verification process includes drawing a 200mm sphere with the part as the center, and recording all electrical equipment and wiring harnesses within the sphere. If there are motor system parts or high-voltage wiring harnesses within the sphere, the position needs to be adjusted to ensure that the motor system parts or high-voltage wiring harnesses are outside the sphere. If the controller itself is in a shielded state, the requirements can be appropriately relaxed.

[0071] Specifically, the layout principles of vehicle electrical equipment such as motors and motor controllers are as follows: the distance between the motor and the motor controller exceeds the set value; the motor uses a shielded casing and has a grounding wire, and the position reliability of the grounding point meets the set requirements, that is, the grounding impedance meets the standard requirements.

[0072] Preferably, for electrical equipment such as motors and motor controllers, the verification process includes verifying the layout of the motor and motor controller. If they are integrated together or the distance between the two is less than 200mm, the requirements are met; if the requirements are not met, the relative position between the two is adjusted. Verify whether the motor uses a shielded shell and has a grounding wire. If not, make corresponding modifications, and verify the reliability of the location of the connection point and make adjustments based on the verification process.

[0073] Specifically, the layout principles of high and low voltage wiring harnesses are: the distance between the high voltage line and the low voltage line exceeds the set threshold; the high voltage line and the low voltage line are preferably arranged vertically. If the vertical arrangement does not meet the layout principles of other vehicle electrical equipment, the high voltage line and the low voltage line adopt other layout methods but avoid parallel routing and the wiring harness needs to use shielded wires and twisted pair wires.

[0074] Preferably, for high and low voltage harnesses, the verification process includes: verifying and adjusting the routing paths of high voltage and low voltage wires to ensure that the distance between the two is kept above 200mm, and verifying the wiring layout, avoiding parallel routing, and arranging high voltage and low voltage wires vertically as much as possible. If vertical routing is used, it will lead to the situation that other layout principles cannot be met, that is, if isolation is really impossible, there is no need to use vertical layout, but the harness needs to choose to use shielded wires and twisted pair wires.

[0075] Specifically, the layout principles of the shielded wiring harness are: the shielded wiring harness is connected in a 360° loop; the grounding impedance of the shielded wiring harness reaches a set value; and the CAN line in the shielded wiring harness is arranged in a twisted pair.

[0076] Preferably, the verification of shielded wiring harnesses includes high-voltage wires, CAN wires, LIN wires, radio frequency wire harnesses, etc. The verification process includes: checking the shielding of high-voltage wiring harnesses that need to be shielded and signal wires that are susceptible to interference, whether the wiring harness shielding layout adopts 360° loop connection, and making corresponding adjustments if not; calculating and verifying the grounding impedance of the shielding body, and verifying whether the CAN line adopts twisted pair layout, and making corresponding adjustments if it does not meet the requirements until it meets the requirements.

[0077] Specifically, the layout principles of radio frequency and antenna receiving and transmitting vehicle electrical equipment are as follows: the front, rear, left, right, top and bottom surfaces of the antenna are not blocked by metal; there is no interference source vehicle electrical equipment within a sphere with a set radius centered on the antenna; the antenna cable is shielded; the antenna's cabin penetration position meets the set requirements, that is, there are no wiring harnesses or interference source vehicle electrical equipment around the cabin penetration position with a current value exceeding the set value.

[0078] Preferably, for RF and antenna reception and transmission calibration, the calibration process includes: checking whether there is any metal obstruction on the front, back, left, right, top and bottom surfaces of the antenna, and if so, adjusting the corresponding position. With the antenna as the center, draw a 200mm sphere to check whether there are any interference source parts inside the sphere. If so, adjust the position to ensure that the interference source falls outside the sphere. Check whether the antenna cable is shielded, as well as the position of the antenna through the cabin, and make corresponding adjustments until the layout requirements are met, that is, there are no high-current harnesses or strong interference sources around.

[0079] Specifically, the layout principles of vehicle electrical equipment such as autonomous driving control equipment based on cameras and radars are as follows: the wiring distance of the wiring harness is minimized, the number of cabin penetrations is minimized, and the plug loss of connectors is minimized; and there is no vehicle electrical equipment that is a source of interference within a sphere with a set radius as the center.

[0080] Preferably, for the camera- and radar-based automatic driving control equipment, the verification process includes: checking the transmission path of the connection harness of the camera, radar and automatic driving controller, the number of cabins through which the connection harness passes, the fixation of the connectors of the connection harness, etc., and making corresponding adjustments to ensure that the wiring harness is as short as possible, the number of cabins through which the connection harness passes is reduced, and the connectors use plugs with low insertion loss. Draw a 200mm sphere with the automatic driving controller as the center, and check whether there are any strong interference source parts and equipment in the electrical equipment in the sphere. If there are any, adjust their layout to ensure that they fall outside the sphere.

[0081] Example 2

[0082] The present invention also provides a vehicle electrical equipment layout electromagnetic compatibility verification system, comprising: a drawing import module, an equipment identification module, a layout principle determination module, an electromagnetic compatibility verification module and a drawing output module;

[0083] The drawing import module is used to import the 3D data of vehicle design;

[0084] The device identification module is used to identify the relative positions between the vehicle electrical devices and the electromagnetic compatibility characteristics and types of the vehicle electrical devices according to the device identification module;

[0085] The arrangement principle determination module is used to determine the arrangement principle of the surrounding vehicle electrical equipment according to the electromagnetic compatibility characteristics and types of each vehicle electrical equipment;

[0086] The electromagnetic compatibility verification module is used to adjust the positions of the surrounding vehicle electrical equipment of each vehicle electrical equipment based on the principle of minimizing movement, so that all vehicle electrical equipments meet the corresponding layout principles with each other;

[0087] The drawing output module is used to output the 3D data of the vehicle design after adjusting the layout position.

[0088] Example 3

[0089] The present invention also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the electromagnetic compatibility verification method for the arrangement of electrical equipment in a vehicle described in the above technical solution is implemented.

[0090] Example 4

[0091] The present invention also provides an electronic device, comprising: a memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the electromagnetic compatibility verification method for the arrangement of vehicle electrical equipment as described in the above technical solution by executing the computer instructions.

[0092] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take 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.

[0093] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0094] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0095] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0096] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

[0097] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A method for verifying electromagnetic compatibility of vehicle electrical equipment layout, characterized in that: The following steps are involved: Identify the relative positions of vehicle electrical equipment and the electromagnetic compatibility characteristics and types of vehicle electrical equipment; Determine the layout principles of the surrounding vehicle electrical equipment based on the electromagnetic compatibility characteristics and types of each vehicle electrical equipment; Based on the principle of minimizing movement, the positions of the surrounding vehicle electrical equipment of each vehicle electrical equipment are adjusted so that all vehicle electrical equipment meet their corresponding layout principles.

2. The electromagnetic compatibility verification method for vehicle electrical equipment layout according to claim 1, characterized in that: The process of identifying the relative positions of the vehicle electrical devices includes: identifying the positions of the various vehicle electrical devices in the vehicle space according to the vehicle design 3D data.

3. The electromagnetic compatibility verification method for vehicle electrical equipment layout according to claim 1, characterized in that: The process of identifying the electromagnetic compatibility characteristics and types of vehicle electrical equipment includes: determining the vehicle electrical equipment used and its corresponding type based on the 3D data of the whole vehicle design; and determining its electromagnetic compatibility characteristics based on the type of the vehicle electrical equipment.

4. The electromagnetic compatibility verification method for vehicle electrical equipment layout according to claim 1, characterized in that: The types of vehicle electrical equipment include: controllers, radio frequencies, antenna reception and transmission, motors and motor controllers, high and low voltage wiring harnesses, shielded wiring harnesses, and camera- and radar-based automatic driving control equipment; the electromagnetic compatibility characteristics include: interference sources and sensitive bodies.

5. The electromagnetic compatibility verification method for vehicle electrical equipment layout according to claim 4, characterized in that: The layout principle of sensitive vehicle electrical equipment is as follows: there is no interference source type vehicle electrical equipment within the sphere of a set radius with the vehicle electrical equipment as the center; there is no vehicle electrical equipment whose operating current exceeds the set threshold within the set straight line range of the routing of the vehicle electrical equipment; there is no vehicle electrical equipment whose current change exceeds the set threshold or is an interference source type in other wiring harnesses that are co-linear with the vehicle electrical equipment.

6. The electromagnetic compatibility verification method for vehicle electrical equipment layout according to claim 4, characterized in that: The layout principle of controller-type vehicle electrical equipment is: there is no motor-type vehicle electrical equipment or high-voltage wiring harness within a sphere with a set radius as the center of the vehicle electrical equipment.

7. The electromagnetic compatibility verification method for vehicle electrical equipment layout according to claim 4, characterized in that: The layout principles of vehicle electrical equipment such as motors and motor controllers are as follows: the distance between the motor and the motor controller exceeds the set value; the motor uses a shielded casing and has a grounding wire, and the grounding impedance of the grounding point meets the set requirements.

8. The electromagnetic compatibility verification method for vehicle electrical equipment layout according to claim 4, characterized in that: The layout principles of high and low voltage wiring harnesses are as follows: the distance between high voltage wires and low voltage wires exceeds the set threshold; high voltage wires and low voltage wires are preferably arranged vertically. If the vertical arrangement does not meet the layout principles of other vehicle electrical equipment, high voltage wires and low voltage wires are arranged in other ways but parallel routing is avoided and the wiring harness needs to use shielded wires and twisted pair wires.

9. The electromagnetic compatibility verification method for vehicle electrical equipment layout according to claim 4, characterized in that: The layout principles of the shielded wiring harness are: the shielded wiring harness is connected in a 360° loop; the grounding impedance of the shielded wiring harness reaches the set value; the CAN line in the shielded wiring harness is arranged in twisted pair.

10. The electromagnetic compatibility verification method for vehicle electrical equipment layout according to claim 4, characterized in that: The layout principles of radio frequency and antenna receiving and transmitting vehicle electrical equipment are as follows: the front, rear, left, right, top and bottom surfaces of the antenna are not blocked by metal; there is no interference source vehicle electrical equipment within the sphere of a set radius centered on the antenna; the antenna cable is shielded, and there is no wiring harness or interference source vehicle electrical equipment with a current value exceeding the set value within the set range of the antenna's cabin penetration position.

11. The electromagnetic compatibility verification method for vehicle electrical equipment layout according to claim 4, characterized in that: The layout principles of vehicle electrical equipment such as automatic driving control equipment based on cameras and radars are as follows: minimize the wiring distance of the wiring harness, minimize the number of cabin penetrations, and minimize the plug loss of connectors; and there is no vehicle electrical equipment that is a source of interference within a sphere with a set radius as the center.

12. The electromagnetic compatibility verification method for vehicle electrical equipment layout according to claim 4, characterized in that: The type of electronic module to which the vehicle electrical equipment belongs or on which the transmission path acts is determined based on the physical and electrical characteristics of the vehicle electrical equipment, and its electromagnetic compatibility characteristics are determined based on the corresponding electronic module: active electronic modules are interference sources or sensitive bodies; motors are interference sources; passive electronic modules are sensitive bodies; and inductive components are interference sources.

13. A vehicle electrical equipment layout electromagnetic compatibility verification system, characterized in that include: Drawing import module, equipment identification module, layout principle determination module, electromagnetic compatibility verification module and drawing output module; The drawing import module is used to import the 3D data of vehicle design; The device identification module is used to identify the relative positions between the vehicle electrical devices and the electromagnetic compatibility characteristics and types of the vehicle electrical devices according to the device identification module; The arrangement principle determination module is used to determine the arrangement principle of the surrounding vehicle electrical equipment according to the electromagnetic compatibility characteristics and types of each vehicle electrical equipment; The electromagnetic compatibility verification module is used to adjust the positions of the surrounding vehicle electrical equipment of each vehicle electrical equipment based on the principle of minimizing movement, so that all vehicle electrical equipments meet the corresponding layout principles with each other; The drawing output module is used to output the 3D data of the vehicle design after adjusting the layout position.

14. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the electromagnetic compatibility verification method for the arrangement of electrical equipment in a vehicle according to any one of claims 1 to 10 is implemented.

15. An electronic device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the electromagnetic compatibility verification method for the arrangement of electrical equipment in a vehicle as described in any one of claims 1 to 12 by executing the computer instructions.

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