A method and device for verifying parts of an electromagnetic clean cabin in a vehicle

Abstract

This invention relates to a method and apparatus for verifying components in an electromagnetic clean cabin within a vehicle. The verification method includes: identifying the installation location of the component within the vehicle; determining the component to be tested; dividing the component into sections; testing the divided component using a measuring device; and processing and analyzing the data on the identified installation location of the component within the vehicle. The verification apparatus includes an insulating bracket and a measuring device mounted on the insulating bracket. The insulating bracket holds the component to be tested, and the measuring device is used to test the divided component. The measuring device includes a detection probe and a detection body. This invention eliminates the need to test all components in the vehicle, significantly reducing the certification risk of electromagnetic cleanliness for the entire vehicle, minimizing design rework in the later stages of vehicle development, shortening the development cycle, and achieving risk prevention during the development process.

Description

Technical Field

[0001] This invention belongs to the field of smart health cabin certification technology, and specifically relates to a method and device for verifying components of an in-vehicle electromagnetic clean cabin. Background Technology

[0002] As vehicles become increasingly electronic, electrical, and intelligent, the electromagnetic environment inside the vehicle is becoming more complex. This complex electromagnetic environment is exacerbating the impact on human health, leading to greater public concern about in-vehicle health. Consequently, the demand for intelligent health certification for vehicles has emerged, with electromagnetic clean cabin certification being a crucial component. Currently, electromagnetic clean cabin certification only applies to the entire vehicle, meaning that compliance with certification requirements can only be determined after vehicle testing in the later stages of development. This undoubtedly presents numerous challenges for vehicle development.

[0003] However, how can we better meet the certification requirements for electromagnetic clean cabins? The essence of electromagnetic interference ultimately lies in the components. If the relevant requirements for electromagnetic clean cabins are incorporated into the component development process, certification risks can be largely avoided and vehicle development progress can be guaranteed. However, there are currently no corresponding control and measurement methods for electromagnetic clean cabin-related components in the industry.

[0004] A search revealed that Chinese Patent CN112684269A discloses a method and system for testing the radiated immunity of automotive components. The method includes: a radiated immunity testing device performing a whole-vehicle radiated immunity test on an automotive component in an electromagnetic compatibility (EMC) anechoic chamber; a field strength meter acquiring field strength information at a target location at a set distance from the component under test; a host computer acquiring the field strength information, determining the field strength curve corresponding to the component under test in the whole-vehicle radiated immunity test, and matching the field strength information at the target location with the field strength curve through closed-loop control of the radiated immunity testing device to obtain the test curve required for the component radiated immunity test; and the radiated immunity testing device performing a component radiated immunity test based on the test curve when the component under test is located in the EMC anechoic chamber. While this application achieves the effect of previewing the whole vehicle's radiation immunity test by using the test intensity of the whole vehicle test conditions, thus avoiding risks in advance and ensuring that the whole vehicle's radiation immunity test can be passed, and can solve the problem of excessive or insufficient radiation immunity field strength caused by existing test methods, it requires scanning all components of the vehicle when testing the vehicle's radiation immunity capability. It does not specifically control and test key components, resulting in a large workload, low testing efficiency, and a long development cycle.

[0005] Chinese patent CN205091396U discloses an electromagnetic radiation detection device for electric vehicles. The device includes a fixed bracket, a detector fixing device, and radiation measurement probes. The fixed bracket comprises a horizontal frame, a vertical frame, and an angle adjustment shaft. During testing, the angle adjustment shaft is adjusted to simulate the human body shape in a seated position as closely as possible to the angle between the horizontal and vertical frames. Simultaneously, based on the body shape of the simulated person, the horizontal slider is adjusted to move horizontally along a horizontal rail, and the vertical slider is adjusted to move vertically along a vertical rail. Then, the sliders are fixed, and the two radiation measurement probes are activated to measure radiation, simulating the radiation received by the chest and groin areas of the human body. Although it is possible to measure the radiation received by different parts of the body, such as the head, chest, and groin, of people of different sizes inside an electric vehicle by simulating the posture of a human being riding in a car, the above method does not simulate the radiation generated by the components under extreme operating conditions because the radiation and other inductive effects produced by the car components are not the same under different operating conditions. Radiation and other factors can affect people's health, so the test needs to simulate the worst or even worse conditions, that is, the radiation level under the operating conditions where the components produce a large amount of radiation. Therefore, the test results cannot meet the current needs.

[0006] To address the aforementioned issues, it is necessary to design a method and device for verifying components in an in-vehicle electromagnetic clean cabin. Summary of the Invention

[0007] To address the above problems, this invention provides a method for verifying components in an in-vehicle electromagnetic clean cabin, the verification method comprising:

[0008] Identify the installation location of components within the vehicle;

[0009] Identify the component to be tested;

[0010] Divide the components;

[0011] The measured parts are inspected using a measuring device;

[0012] Data processing and analysis are performed on the test data.

[0013] Preferably, the division of components includes dividing the components into rated power components and constant current and constant voltage components based on the working principle of the component design.

[0014] Preferably, the detection of the divided components to be tested includes detection when operating at the lowest voltage and detection when operating at the maximum power.

[0015] Among them, the detection at the lowest voltage is for rated power components, and the detection at the maximum power is for constant current and constant voltage components.

[0016] Preferably, the data processing includes correlating the detection data with test frequency points to ensure data integrity and no loss, classifying the detection data, and adding notes indicating the test location of the component corresponding to the detection data.

[0017] Preferably, the data analysis includes comparing the obtained detection data with the magnetic induction intensity value. If the detection data in all test frequency ranges is less than or equal to 15% of the magnetic induction intensity value, it is considered qualified; otherwise, it is considered unqualified.

[0018] Preferably, the test frequency range is 10Hz to 400kHz.

[0019] Preferably, the inspection of the divided components includes inspecting each surface of the components and inspecting the wiring harness of the components.

[0020] The present invention also provides a verification apparatus for implementing the above verification method, the verification apparatus comprising an insulating support and a measuring device disposed on the insulating support.

[0021] The insulating bracket is used to place the component to be tested, and the measuring device is used to detect the divided component to be tested. The measuring device includes a detection probe and a detection body.

[0022] Preferably, the verification device further includes a test load, to which multiple artificial power sources are connected, and the artificial power sources are connected to a battery via wires.

[0023] Preferably, the test load is connected to the wiring harness of the component under test.

[0024] The present invention has the following beneficial effects:

[0025] 1. When testing the electromagnetic clean cabin of the whole vehicle, the present invention screens the parts in advance according to the installation position of the parts, selects the parts of key parts for testing, and eliminates the need to test all parts of the whole vehicle. This greatly reduces the certification risk of electromagnetic cleanliness of the whole vehicle, avoids design rework in the later stage of vehicle development to the greatest extent, shortens the development cycle, and achieves risk prevention in the development process.

[0026] 2. In this invention, the selected components need to be classified into categories before testing, specifically into rated power components and constant current and constant voltage components. The lowest voltage test and the maximum power test are performed according to the different types of components. This can ensure that components with different characteristics work in the maximum magnetic induction emission state during testing, that is, the magnetic induction emission state of the components under extreme working conditions is detected, so that the test results are more in line with actual needs.

[0027] 3. In this invention, when testing the components and the wiring harnesses on the components, the probe of the measuring device is made to directly contact the surface of the components and the middle of the wiring harnesses, making the test results more accurate.

[0028] 4. The testing method proposed in this invention is applicable to all vehicles, including traditional fuel vehicles, hybrid vehicles, and pure electric vehicles, and has a wider range of applications.

[0029] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This invention illustrates a flowchart of a method for verifying components in an in-vehicle electromagnetic clean cabin according to an embodiment of the present invention.

[0032] Figure 2 This diagram shows the distribution of relevant components in the electromagnetic clean cabin of the whole vehicle in an embodiment of the present invention.

[0033] Figure 3 The public exposure limits of GB 8702-2014 are shown in the embodiments of the present invention;

[0034] Figure 4 This illustrates the test steps in an embodiment of the present invention;

[0035] Figure 5 This is a top view of an in-vehicle electromagnetic clean cabin component verification device according to an embodiment of the present invention, when the component to be tested is being inspected.

[0036] Figure 6 This figure shows a cross-sectional view of the component inspection device in an in-vehicle electromagnetic clean cabin component verification device according to an embodiment of the present invention.

[0037] Figure 7 This diagram illustrates the structure of a component wiring harness inspection device in an in-vehicle electromagnetic clean cabin component verification device according to an embodiment of the present invention.

[0038] Figure 8This is a side view of a component wiring harness being inspected in an in-vehicle electromagnetic clean cabin component verification device according to an embodiment of the present invention.

[0039] In the diagram: 1. Test load; 2. Measuring device; 201. Detection probe; 202. Detection body; 3. Insulating support; 4. Storage battery; 5. Manual power supply. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] As attached Figure 1 As shown, a verification method for components in an in-vehicle electromagnetic clean cabin is provided. The verification method includes:

[0042] Identify the installation location of components in the vehicle.

[0043] Identify the component to be tested, as shown in the attached document. Figure 2 As shown, in this embodiment, components in the driver's seat, front passenger seat, center console, and passenger seat of the car are selected for testing.

[0044] The components are classified, including into rated power components and constant current and constant voltage components based on their working principles.

[0045] The measured components are divided into sections for testing. This testing includes measurements at minimum voltage and maximum power. Minimum voltage testing is for rated power components, while maximum power testing is for constant current / constant voltage components. Specifically, since the limit used in this embodiment is the magnetic induction limit, it ensures that components with different characteristics operate at maximum magnetic emission during testing. For rated power components, they are tested at the minimum allowable voltage to ensure maximum current; while for constant current / constant voltage components, they are tested at maximum power to ensure stringent testing conditions. Because the surfaces of components and wiring harnesses are the main sources of radiated interference and require focused measurement as key indicators of component compliance, the testing of the divided components includes measuring the surfaces and wiring harnesses. When testing the wiring harnesses, the center position is primarily measured. It is worth noting that for components with multiple power interfaces, the wiring harnesses on each interface need to be tested separately.

[0046] The test setup varies depending on the type of component. In this embodiment, to avoid electromagnetic interference from the external environment, the test results need to be conducted in a shielded room or anechoic chamber to ensure the reliability of the test results. The same testing equipment as for the whole vehicle electromagnetic clean cabin certification is used: a B-field probe (ELT-400) and an electromagnetic field exposure test system data acquisition instrument. Detailed requirements for the measuring device are specified in Chapter 4.5 of "Measuring Methods of Electromagnetic Fields of Vehicles Relative to Human Exposure" (GB / T 37130-2018). The arrangement of the measuring device follows the standards of "Limits and Measurement Methods of Radio Interference Characteristics of Vehicles, Ships and Internal Combustion Engines for the Protection of Onboard Receivers" (GB / T18655-2018). Considering the characteristics of whole vehicle certification, component testing is rigorously screened to ensure the pass rate of whole vehicle certification. Therefore, during testing, the detection probe of the measuring device is directly in contact with the surface of the components and wiring harnesses to simulate the extreme conditions of whole vehicle testing under actual product layout conditions. In this embodiment, the test frequency range is 10Hz to 400kHz. The test limits refer to the public exposure limits in "Electromagnetic Environment Control Limits" (GB 8702-2014), and are consistent with the electromagnetic clean cabin certification for whole vehicles, using magnetic induction intensity limits, requiring them not to exceed 15% of the limit. Specific limit data are attached. Figure 3 As shown.

[0047] The test steps are as follows: Figure 4As shown, the test frequency is f. When 10 Hz ≤ f < 5 kHz, the frequency resolution is less than or equal to 1 Hz; when 5 kHz ≤ f < 50 kHz, the frequency resolution is less than or equal to 5 Hz; when 50 kHz ≤ f ≤ 400 kHz, the frequency resolution is less than or equal to 50 Hz.

[0048] Data processing and data analysis are performed on the detected data. Data processing includes corresponding the detected data to the test frequency points to ensure the integrity of the data without loss, and classifying the detected data, and making notes to describe the test positions of the components corresponding to the detected data. Data analysis includes comparing the obtained detected data with the magnetic induction intensity value. If the detected data within all test frequency ranges are less than or equal to 15% of the magnetic induction intensity value, it is considered qualified; otherwise, it is considered unqualified.

[0049] It should be noted that the above embodiments are only for illustrating the basic test process and experimental methods of the present invention. However, the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the overall requirements and essential methods of the present invention (such as improvements in test positions, changes in test modes, adjustments of test limits, or addition or deletion of components related to the electromagnetic clean cockpit, etc.). These changes and improvements are also regarded as the protection scope of the present invention.

[0050] In summary, the present invention controls and tests the pipe components in the vehicle system, without testing all components of the vehicle, greatly reducing the certification risk of vehicle electromagnetic cleanliness, avoiding design rework in the later stage of vehicle development to the greatest extent, shortening the development cycle, and achieving risk prevention during the development process. Moreover, the above test method is applicable to all vehicles, such as traditional fuel vehicles, hybrid vehicles, and pure electric vehicles, etc., with a wider scope of application.

[0051] As shown in the append Figure 5 and in the append Figure 6 As shown, a verification device for implementing the above verification method includes an insulating bracket 3 and a measuring device 2 provided on the insulating bracket 3. The measuring device 2 is the measuring device in the above verification method. The insulating bracket 3 is used to place the components to be tested, and the measuring device 2 is used to detect the divided components to be tested. The measuring device 2 includes a detection probe 201 and a detection body 202. When detecting the components to be tested, the detection probe 201 of the measuring device 2 can be contacted with each surface of the component for testing. As shown in the append Figure 7 As shown, the verification device further includes a test load 1. The test load 1 is connected to the wire harness of the component to be tested. A plurality of artificial power supplies 5 are connected to the test load 1, and the artificial power supplies 5 are connected to a storage battery 4 through wires. As shown in the append Figure 8As shown, when testing the wiring harness of the component to be tested, simply bring the testing probe 201 into contact with the middle of the wiring harness.

[0052] Those skilled in the art should understand that, despite the detailed description of the present invention with reference to the foregoing embodiments, modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for verifying components in an in-vehicle electromagnetic clean cabin, the verification method comprising: Identify the installation location of components in the vehicle, including the driver's position, the front passenger position, the center console position, and the passenger position; Identify the component to be tested; Divide the components; The measured parts are inspected using a measuring device; Data processing and analysis are performed on the test data; The classification of components includes dividing components into rated power components and constant current and constant voltage components based on the working principle of the component design. The detection of the predefined components to be tested includes the detection of magnetic induction intensity at the lowest voltage and the detection of magnetic induction intensity at the maximum power. Among them, the detection at the lowest voltage is for rated power components, and the detection at the maximum power is for constant current and constant voltage components. The inspection of the pre-defined components includes inspecting each surface of the components and inspecting the wiring harnesses of the components. The data analysis includes comparing the obtained detection data with the magnetic induction intensity value. If the detection data in all test frequency ranges is less than or equal to 15% of the magnetic induction intensity value, it is considered qualified; otherwise, it is considered unqualified. The test frequency range is 10Hz to 400kHz.

2. The method for verifying components in an in-vehicle electromagnetic clean cabin according to claim 1, wherein, The data processing includes correlating the detection data with the test frequency points to ensure data integrity and no loss, classifying the detection data, and adding notes indicating the test location of the component corresponding to the detection data.

3. A verification apparatus for implementing the verification method according to any one of claims 1-2, the verification apparatus comprising an insulating support (3) and a measuring device (2) disposed on the insulating support (3). The insulating bracket (3) is used to place the parts to be tested, and the measuring device (2) is used to detect the divided parts to be tested. The measuring device (2) includes a detection probe (201) and a detection body (202).

4. The verification apparatus according to claim 3, wherein, The verification device also includes a test load (1), on which multiple artificial power sources (5) are connected, and the artificial power sources (5) are connected to a battery (4) via wires.

5. The verification apparatus according to claim 4, wherein, The test load (1) is connected to the wiring harness of the component to be tested.

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