Device for testing the anti-interference performance of a controller
By using a metal horn and conductive connecting wires to build a simple circuit, the problems of high cost and inconvenience in the anti-interference testing of existing electric vehicle controllers are solved, realizing low-cost and rapid anti-interference testing and adapting to the testing needs of interference of different intensities.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI JINGHUI ELECTRONICS
- Filing Date
- 2025-08-26
- Publication Date
- 2026-07-21
AI Technical Summary
Existing methods for testing the anti-interference capabilities of electric vehicle controllers require expensive instruments and specialized facilities, and cannot detect mutual inductance interference in the wiring during the vehicle assembly process. This results in high testing costs and is time-consuming and labor-intensive, especially when a specialized testing environment is lacking.
A simple circuit is built using a metal horn and conductive connecting wires. The interference intensity can be adjusted by changing the position and length of the line nodes, thus replacing expensive instruments for anti-interference testing.
It effectively reduces testing costs, simplifies test platform setup, quickly determines the controller's anti-interference capability, and adapts to testing needs for interference of varying intensities.
Smart Images
Figure CN224536384U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electric vehicle controller testing technology, and in particular to a device for testing the anti-interference performance of a controller. Background Technology
[0002] Common testing methods for evaluating the anti-interference capability of electric vehicle controllers generally include: using an electrical fast transient burst simulator (EFT) with a specialized current coupling clip to couple interference into the wiring harness; or using a current transformer as a current injection probe (BCI high current injection) to directly couple the interference signal onto the wiring harness; or going directly to a specialized testing institution for testing with specialized instruments.
[0003] The existing technology has the following drawbacks:
[0004] 1. Traditional testing methods often require expensive instruments and often require the construction of special anti-interference sites to facilitate testing. The circuits required for testing are also relatively complicated, resulting in high material and human resource costs.
[0005] 2. Sometimes, emergency testing is required, especially when there is a large number of tests and no dedicated testing environment. If there is no dedicated testing institution in the local area or no dedicated testing equipment nearby, the drawbacks of traditional testing will become particularly obvious.
[0006] 3. During the assembly of the vehicle, the different wiring lengths used in different circuits, or the mutual inductance interference caused by the collinearity, cannot be detected by the early testing methods. It will be more time-consuming and labor-intensive to re-perform EFT and other tests on the whole vehicle later.
[0007] Therefore, a simple, convenient, practical, and adjustable anti-interference testing scheme is needed. Utility Model Content
[0008] To solve the above-mentioned technical problems, this utility model provides a device for testing the anti-interference performance of a controller.
[0009] This utility model provides a device for testing the anti-interference performance of a controller, comprising: a metal horn and a conductive connecting wire;
[0010] The positive terminal of the metal horn is electrically connected to the operating power supply, and its negative terminal is electrically connected to the first end of the conductive connecting line.
[0011] The second end of the conductive connection line is electrically connected to the circuit common ground terminal, which serves as the common ground terminal.
[0012] A first electrical connection point is provided on the wire body between the first end and the second end of the conductive connecting wire.
[0013] Specifically, when performing interference testing on the controller, one of the first end, the second end, or the first electrical connection point on the conductive connection line is selected as the interference output terminal and electrically connected to the I / O function port of the controller.
[0014] One possible implementation also includes an interference output line;
[0015] The first end of the interference output line is electrically connected to the interference output terminal, and its second end is used to be electrically connected to the IO function port.
[0016] One possible implementation also includes a test power supply;
[0017] The positive terminal of the test power supply is electrically connected to the positive terminal of the metal horn, and its negative terminal is electrically connected to the common ground of the circuit.
[0018] In one possible implementation, the length of the conductive connecting wire ranges from 1 to 2.5 m.
[0019] In one possible implementation, the length of the conductive connecting wire is any one of 1m, 2m, or 2.5m.
[0020] In one possible implementation, the first electrical connection point is located on the line body at the midpoint between the first and second ends of the conductive connection line.
[0021] In one possible implementation, the metal horn is an iron horn.
[0022] In one possible implementation, a second electrical connection point is further provided on the wire body between the first end and the second end of the conductive connecting wire;
[0023] Specifically, when performing interference testing on the controller, one of the first end, the second end, the first electrical connection point, and the second electrical connection point on the conductive connection line is selected as the interference output terminal and electrically connected to the I / O function port of the controller.
[0024] This utility model also provides another device for testing the anti-interference performance of a controller, including: a metal horn and several spare conductive connecting wires of different lengths;
[0025] The positive terminal of the metal horn is electrically connected to the working power supply, and its negative terminal is electrically connected to the first end of one of the several spare conductive connecting wires of different lengths.
[0026] The second end of the conductive connection line is electrically connected to the circuit common ground terminal, which serves as the common ground terminal.
[0027] A first electrical connection point is provided on the wire body between the first end and the second end of the conductive connecting wire.
[0028] Specifically, when performing interference testing on the controller, one of the first end, the second end, or the first electrical connection point on the conductive connection line is selected as the interference output terminal and electrically connected to the I / O function port of the controller.
[0029] In one possible implementation, several spare interference output lines of different lengths are also included;
[0030] The several spare interference output lines of different lengths are used to select one as the interference output line;
[0031] The first end of the interference output line is electrically connected to the interference output terminal, and its second end is used to be electrically connected to the IO function port.
[0032] The technical solution provided by this utility model has at least the following beneficial effects:
[0033] 1. Using metal horns and simple circuits to replace expensive testing instruments and specialized testing environments can not only effectively save on instrument costs, but also reduce the time required to set up the testing platform and facilitate testing.
[0034] 2. By simply changing the position of the connection point on the external circuit, i.e. the conductive connection line, the controller can be subjected to interference of different intensities, which can quickly determine the controller's anti-interference capability. Attached Figure Description
[0035] Figure 1 A schematic diagram of the first structure of the device for testing the anti-interference performance of the controller provided in this embodiment of the utility model during testing;
[0036] Figure 2 A second structural schematic diagram of the device for testing the anti-interference performance of the controller provided in this embodiment of the utility model during testing;
[0037] Figure 3 This is a third structural diagram of the device for testing the anti-interference performance of the controller provided in this embodiment of the utility model during testing. Detailed Implementation
[0038] To enhance understanding of this utility model, it will be described in further detail below with reference to the accompanying drawings and embodiments. These embodiments are only used to explain this utility model and do not limit the scope of protection of this utility model.
[0039] Please refer to Figures 1 to 3 The present invention provides a device for testing the anti-interference performance of a controller, comprising: a metal horn and a conductive connecting wire AB;
[0040] The positive terminal of the metal horn is electrically connected to the operating power supply VCC1, and its negative terminal is electrically connected to the first end A of the conductive connection line AB.
[0041] The second end B of the conductive connection line AB is electrically connected to the common ground point of the circuit, which serves as the common ground terminal.
[0042] A first electrical connection point P1 is provided on the conductor between the first end A and the second end B of the conductive connecting line AB.
[0043] Specifically, when performing interference testing on the controller, one of the first end A, the second end B, and the first electrical connection point P1 on the conductive connection line AB is selected as the interference output terminal and electrically connected to the IO function port of the controller.
[0044] In this embodiment, the device for testing the anti-interference performance of the controller essentially uses a metal horn (such as an iron horn) to build a simple circuit, thereby applying interference to the controller's internal circuitry and verifying its anti-interference capabilities. The horn itself is essentially an inductor, impeding rapid changes in current. Therefore, at the instant the horn is powered on and off, a high reverse electromotive force, or reverse induced voltage, is generated on the horn's power line. Simultaneously, due to the internal structure of the metal horn, voltage spikes are generated during the repeated connection and disconnection of the moving and stationary plates. Conventional horns, in practical applications, typically have a small capacitor connected in parallel at the horn's power supply terminal. This capacitor usually absorbs the aforementioned interference, its main function being to discharge instantaneous high voltage and absorb reverse voltage. The key to this invention is removing the small capacitor from the metal horn, thus allowing the metal horn to be used as a stable and controllable interference source. The intensity of the applied interference can be adjusted by controlling the position and length of the externally constructed circuit nodes. The length of the conductive connecting wire AB can be selected according to actual testing needs. The specific location of the first electrical connection point P1 set on the line between the first end A and the second end B of the conductive connecting line AB can be selected according to actual needs, such as the midpoint of the conductive connecting line AB.
[0045] One possible implementation also includes an interference output line PC;
[0046] The first terminal P of the interference output line PC is electrically connected to the interference output terminal, and its second terminal C is used to electrically connect to the IO function port.
[0047] In this embodiment, the core of the testing method is to select a point on the conductive connection line AB between the negative terminal of the metal speaker (such as an iron speaker) and the common ground of the entire circuit, and connect it to the interference output line PC. The interference output line PC is then connected to the I / O function port of the controller. The intensity of the interference is adjusted by changing the connection position of the interference output line PC on the conductive connection line AB, as well as the lengths of the conductive connection line AB and the interference output line PC. Then, the level signal of the I / O port used for output function of the controller is observed using an oscilloscope to confirm the intensity of the interference to the internal circuits and components of the controller, and whether the controller will reset or crash due to the interference.
[0048] In one specific implementation, a metal horn serves as the interference source. A first regulated power supply provides VCC1 (e.g., 12V) to power the metal horn, and a second regulated power supply provides VCC2 to power the controller and its internal chip. The second end B of the conductive connection line AB is connected to the common ground of the circuit. The interference output line PC connects from the negative terminal of the metal horn to the I / O port of the controller. When the first regulated power supply powers the metal horn, the current, after applying interference through the metal horn, is transmitted through point AP and applied to the controller. Due to the characteristics of the regulated power supply, the voltage at the common ground of the circuit is very stable and has a very strong ability to absorb interference. Therefore, when the length of the conductive connection line AB is fixed, the interference applied to the controller is relatively reduced when P is close to point B, and the interference is minimal when PB is at the common ground. Similarly, the interference applied to the controller reaches its maximum when PA is at the common ground. Some specific test results are shown in Tables 1 and 2.
[0049] Table 1:
[0050]
[0051] Table 2:
[0052]
[0053] One possible implementation also includes a test power supply;
[0054] The positive terminal of the test power supply is electrically connected to the positive terminal of the metal horn, and its negative terminal is electrically connected to the common ground of the circuit.
[0055] In this embodiment, the test power supply can be a conventional regulated power supply that provides 12V voltage, and the specific model can be selected according to actual needs.
[0056] In one possible implementation, the length of the conductive connecting line AB ranges from 1 to 2.5 m.
[0057] In one possible implementation, the length of the conductive connecting line AB is any one of 1m, 2m, or 2.5m.
[0058] In one possible implementation, the first electrical connection point P1 is located on the line body at the midpoint between the first end A and the second end B of the conductive connection line AB.
[0059] In one possible implementation, the metal horn is an iron horn.
[0060] In one possible implementation, a second electrical connection point P2 is further provided on the conductor between the first end A and the second end B of the conductive connecting line AB.
[0061] When conducting interference tests on the controller, one of the first end A, the second end B, the first electrical connection point P1, and the second electrical connection point P2 on the conductive connection line AB is selected as the interference output terminal and electrically connected to the IO function port of the controller.
[0062] In this embodiment, the first electrical connection point P1 and the second electrical connection point P2 can be equally spaced on the conductive connection line AB, or their specific positions can be determined according to actual needs. In specific implementation, a third electrical connection point P3 or more electrical connection points can be set on the line between the first end A and the second end B of the conductive connection line AB, as needed. The third electrical connection point P3 or more electrical connection points can all be selected as interference output terminals and electrically connected to the I / O function port of the controller.
[0063] This utility model also provides another device for testing the anti-interference performance of a controller, including: a metal horn and several spare conductive connecting wires of different lengths;
[0064] The positive terminal of the metal horn is electrically connected to the working power supply VCC1, and its negative terminal is electrically connected to the first end A of the spare conductive connecting wires of different lengths selected as the conductive connecting wire AB.
[0065] The second end B of the conductive connection line AB is electrically connected to the common ground point of the circuit, which serves as the common ground terminal.
[0066] A first electrical connection point P1 is provided on the conductor between the first end A and the second end B of the conductive connecting line AB.
[0067] Specifically, when performing interference testing on the controller, one of the first end A, the second end B, and the first electrical connection point P1 on the conductive connection line AB is selected as the interference output terminal and electrically connected to the IO function port of the controller.
[0068] In this embodiment, several spare conductive connecting wires of different lengths can be used sequentially as conductive connecting wires AB for specific testing. This allows for the provision of interference of different intensities by changing the length of conductive connecting wires AB, effectively improving the controllability of interference intensity.
[0069] In one possible implementation, several spare interference output lines of different lengths are also included;
[0070] The several spare interference output lines of different lengths are used to select one as the interference output line PC;
[0071] The first terminal P of the interference output line PC is electrically connected to the interference output terminal, and its second terminal C is used to electrically connect to the IO function port.
[0072] In this embodiment, several spare interference output lines of different lengths can be used as interference output lines PC in sequence for specific testing. By changing the length of the interference output line PC, different levels of interference can be provided, thereby further improving the controllability of the interference intensity.
[0073] The above embodiments should not limit the present invention in any way. All technical solutions obtained by equivalent substitution or equivalent conversion fall within the protection scope of the present invention.
Claims
1. A device for testing the anti-interference performance of a controller, characterized in that, include: Metal speaker and conductive connecting wire; The positive terminal of the metal horn is electrically connected to the operating power supply, and its negative terminal is electrically connected to the first end of the conductive connecting line. The second end of the conductive connection line is electrically connected to the circuit common ground terminal, which serves as the common ground terminal. A first electrical connection point is provided on the wire body between the first end and the second end of the conductive connecting wire. Specifically, when performing interference testing on the controller, one of the first end, the second end, or the first electrical connection point on the conductive connection line is selected as the interference output terminal and electrically connected to the I / O function port of the controller.
2. The apparatus according to claim 1, characterized in that, It also includes interference output lines; The first end of the interference output line is electrically connected to the interference output terminal, and its second end is used to be electrically connected to the IO function port.
3. The apparatus according to claim 1, characterized in that, It also includes a test power supply; The positive terminal of the test power supply is electrically connected to the positive terminal of the metal horn, and its negative terminal is electrically connected to the common ground of the circuit.
4. The apparatus according to claim 1, characterized in that, The length of the conductive connecting wire ranges from 1 to 2.5 m.
5. The apparatus according to claim 4, characterized in that, The length of the conductive connecting wire is any one of 1m, 2m, or 2.5m.
6. The apparatus according to claim 1, characterized in that, The first electrical connection point is located on the line body at the midpoint between the first end and the second end of the conductive connection line.
7. The apparatus according to claim 1, characterized in that, The metal horn is an iron horn.
8. The apparatus according to claim 1, characterized in that, A second electrical connection point is also provided on the wire body between the first end and the second end of the conductive connecting wire. Specifically, when performing interference testing on the controller, one of the first end, the second end, the first electrical connection point, and the second electrical connection point on the conductive connection line is selected as the interference output terminal and electrically connected to the I / O function port of the controller.
9. A device for testing the anti-interference performance of a controller, characterized in that, include: Metal horn and several spare conductive connecting wires of different lengths; The positive terminal of the metal horn is electrically connected to the working power supply, and its negative terminal is electrically connected to the first end of one of the several spare conductive connecting wires of different lengths. The second end of the conductive connection line is electrically connected to the circuit common ground terminal, which serves as the common ground terminal. A first electrical connection point is provided on the wire body between the first end and the second end of the conductive connecting wire. Specifically, when performing interference testing on the controller, one of the first end, the second end, or the first electrical connection point on the conductive connection line is selected as the interference output terminal and electrically connected to the I / O function port of the controller.
10. The apparatus according to claim 9, characterized in that, It also includes several spare interference output lines of different lengths; The several spare interference output lines of different lengths are used to select one as the interference output line; The first end of the interference output line is electrically connected to the interference output terminal, and its second end is used to be electrically connected to the IO function port.