Airbag test principle and solution for automotive electronics

Airbags are a compelling new technology device on modern cars. In order to reduce the damage to the driver and the occupant caused by the huge inertial force in the frontal collision of the car, Hyundai Motor is generally equipped with an airbag system in the center of the driver's front steering wheel, and some cars are in the front of the driver's sub-toolbox. The airbag system is also installed at the upper end.

The airbag system is mainly composed of a collision sensor, an airbag computer, an SRS indicator lamp and an airbag module.

Airbag test

On the one hand, the airbag must be rigorously tested on the electrical control system of the airbag, and on the other hand, the electrical parameters of the inflator should be tested. Tektronix is ​​able to offer a complete test solution.

(1) Electrical control test, measurement principle

Airbag test principle and solution for automotive electronics

The test results are as follows

Airbag test principle and solution for automotive electronics

2) Inflatable electromechanical parameter test

The 2790 SourceMeter Switching System provides a high-voltage, multi-channel resistance measurement solution for airbags that enables quick and easy access to electrical inspections of airbag inflators and other automotive electronics testing applications. It is the only commercial instrument based on the power, measurement, and signal routing functions required for insulation resistance and wire connectivity measurement. It has a compact and value-package structure. Using a plug-in power/switch module, the 2790 provides programmable high voltage and low current sources to support switching between multiple channels. This unique, versatile, integrated design creates new cost-effective standards for automotive airbag inflators and other automotive electronics test applications. The 2790-HH is a system specifically designed for applications that require high-voltage "inhalation" parallel testing.

Similar to the 2790-H, the 2790-HH is designed for low current and high voltage resistance measurement applications and can test single or dual stage airbag inflation

machine. If used in conjunction with two plug-in modules, it can also test two inflators at a time, greatly increasing test throughput.

2790 Features:

â–  Multi-channel measurement system

â–  Programmable high voltage and low current source

â–  Modular architecture

■ Measure 2-wire and 4-wire resistors from 100μ ohms to 120M ohms

â–  Test continuity and high voltage leakage resistance

Airbag test principle and solution for automotive electronics

Test plan and configuration

Airbag test principle and solution for automotive electronics

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