CN219285295U

CN219285295U - High-current injection immunity verification device for electronic and electric components of road vehicle

Info

Publication number: CN219285295U
Application number: CN202223008074.9U
Authority: CN
Inventors: 张宁; 陈宇军; 王珊珊; 郭锦添; 邵华东; 曾吉生
Original assignee: Vkan Certification And Testing Co ltd
Current assignee: Vkan Certification And Testing Co ltd
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2023-06-30
Anticipated expiration: 2032-11-11

Abstract

The utility model discloses a high-current injection immunity verification device for electronic and electric components of a road vehicle, which comprises an analog load, wherein the analog load is standard impedance which is encapsulated inside and outside and is invisible, the frequency range of the analog load covers DC-4GHz, the maximum standing wave ratio is 1.25, the capability verification device also comprises a coaxial line which is matched with the standard impedance, and an outer conductor and an inner conductor at one end of the coaxial line are respectively connected with two ends of the standard impedance. The device can output stable impedance in the large-current injection immunity test process, is beneficial to enhancing the credibility of the capability verification result, has the advantages of simple structure, low cost, small volume, convenient transportation and reusability, and is very suitable for various capability verification activities.

Description

High-current injection immunity verification device for electronic and electric components of road vehicle

Technical Field

The utility model relates to a high-current injection immunity verification device for electronic and electric components of a road vehicle.

Background

The high-current injection immunity test is an immunity test regulated according to the national standard GB/T33014.4, a disturbance signal is injected into a sample (a vehicle-mounted component) through a signal generator, and whether the working state change of the sample is in an expected range is observed, so that whether the sample meets the standard requirement is judged.

In recent years, with the development of automobiles towards electric, intelligent and networking, more and more electronic devices are integrated in the limited space of automobiles, and more electromagnetic compatibility problems are brought about by the electronic devices. Thus, a capacity verification activity is held to evaluate whether the participating laboratory has the capacity to conduct the GB/T33014.4 heavy current injection test, which facilitates the comparison of the participating laboratory with the same party, thereby increasing the overall level of the entire heavy current injection detection industry.

Current high current injection test capability verification samples typically employ vehicle components directly, the capability verification process of which is generally as follows: as shown in fig. 1 and 2, the PC controls the BCI heavy current injection test system to sequentially inject disturbance signals with different frequencies (usually frequency ranges of 1M to 400M) onto the power supply line of the sample through the injection probe, and then evaluates the capability of the laboratory to perform the heavy current injection test according to the feedback signal on the measurement probe.

The above-mentioned feedback signal is not only relevant for the laboratory test system, but is also largely influenced by the situation of the sample DUT employed. The capability verification sample adopted at present cannot ensure that the capability verification sample keeps good consistency in the frequency range of 1M-400M, and the credibility of the capability verification result is damaged.

Disclosure of Invention

The utility model aims to provide a stable impedance system for a high-current injection immunity test project, so that the credibility of a capability verification result is enhanced.

The utility model aims at realizing the following technical scheme: the device for verifying the high-current injection immunity of the electronic and electric components of the road vehicle comprises an analog load, wherein the analog load is standard impedance which is encapsulated inside and outside and is invisible, the frequency range of the analog load covers DC-4GHz, the maximum standing wave ratio is 1.25, the device for verifying the high-current injection immunity of the electronic and electric components of the road vehicle further comprises a coaxial line matched with the standard impedance, and an outer conductor and an inner conductor at one end of the coaxial line are respectively connected with two ends of the standard impedance.

The average power of the standard impedance is not less than 100W.

The utility model has the advantages of stable impedance, low standing wave coefficient, good pulse resistance and burnout resistance and the like in the process of testing the high current injection immunity of 1MHz-400 MHz.

The beneficial effects are that:

the device can output stable impedance in the large-current injection immunity test process, is beneficial to enhancing the credibility of the capability verification result, has the advantages of simple structure, low cost, small volume, convenient transportation and reusability, and is very suitable for various capability verification activities.

Drawings

FIG. 1 is a schematic diagram of a high current injection test;

FIG. 2 is a top view of a sample testing arrangement;

FIG. 3 is a schematic diagram of a capability verification device according to an embodiment of the present utility model;

fig. 4 is a schematic diagram of a capability verification device according to an embodiment of the present utility model.

Detailed Description

The utility model aims to provide a device for verifying the high-current injection immunity of an electronic and electric component of a road vehicle, wherein fig. 3 is a schematic structural diagram of a sample of the embodiment, fig. 4 is a schematic diagram thereof, the device comprises an analog load 1 and a coaxial line 2, the analog load 1 is a standard impedance which is packaged inside and outside and is invisible, the impedance value is 50Ω, the average power is 100W, the frequency range is DC-4GHz, the maximum standing wave ratio is 1.25, the coaxial line 2 is matched with the standard impedance, and an outer conductor and an inner conductor at one end of the coaxial line 2 are respectively connected with two ends of the standard impedance.

The process of verifying the high-current injection immunity of the electronic and electric components of the road vehicle by using the sample is as follows:

according to the standard requirements, arranging samples according to the specification of the operation instruction, connecting coaxial lines of the samples with an artificial network, injecting harassment signals onto the coaxial lines of the samples at a position 450mm away from the samples through an injection probe, arranging a measuring probe at a position 50mm away from the samples, and acquiring the actually-measured injection current values on the coaxial lines in real time through the measuring probe.

Claims

1. The device is characterized by comprising an analog load, wherein the analog load is standard impedance which is encapsulated inside and outside and is invisible, the frequency range of the analog load covers DC-4GHz, the maximum standing wave ratio is 1.25, the device also comprises a coaxial line which is matched with the standard impedance, and an outer conductor and an inner conductor at one end of the coaxial line are respectively connected with two ends of the standard impedance.

2. The capability verification device of claim 1, wherein the average power of the standard impedance is not less than 100W.