ACU(Airbag Control Unit) DV Test Bench
▲ Accelerate Your ACU Development & DTC Monitoring
Our ACU DV Test Bench is designed to provide a comprehensive solution for ACU algorithm debugging, fault injection,and DTC (Diagnostic Trouble Code) monitoring. With a modular architecture and powerful software integration,it helps engineering teams reduce testing time, improve accuracy, and ensure product reliability.
▲ Key Features
✦ 24 Ignition Channels – fully controlled, supporting realistic load simulation
✦ 18 Synchronous or 6 Asynchronous Accelerometer Channels – flexible sensor simulation
✦ Automated Load Board – simulates open circuit, short to VBAT/GND, and other fault states
✦ Expandable Design – up to 12 load boards, scalable per customer needs
✦ Lambda Power Supply Integration – stable and precise power management
✦ NI CAN Bus Interface – seamless communication with ACU software
✦ Comprehensive Software Package – supports algorithm debugging and DTC monitoring
▲ System Benefits
✦ Faster Development Cycles – streamline ACU testing and validation
✦ High Reliability – simulate real-world scenarios with precision
✦ Customizable – scalable architecture to meet your project requirements
✦ Proven Lead Time – typical delivery with 3 to 6 months
▲ Applications
✦ ACU (Airbag Control Unit) algorithm validation
✦ DTC (Diagnostic Trouble Code) fault injection & monitoring
✦ Hardware-in-the-loop (HIL) test environments
✦ Automotive electronics R&D labs
✦ The physical picture of the test bench is as follows:
1. Introduction
This DV test bench is composed of a cabinet, Lambda DC power supply, AAEon industrial control computer, self-made automatic
load circuit board, NI PCI-8513 and upper computer software.
The DV test bench does not support the simulation of real sensors or the testing of ACU airbag detonation time.
But it can monitor the status of ACU algorithms and whether there is a DTC detonation time through diagnostic commands.
The functional test bench covers the following functions:
supporting 24 ignition circuits, up to 18 synchronous acceleration sensors or 6 asynchronous acceleration sensors.
5 seat belt lock switch IO, etc. The IO output by the automatic load board include (5 indicator light load circuits, one ENS circuit).
2. System architecture
3. System Architecture Description
1. CAN card NI PCI-8513 Its main function is to enable CAN communication with 12 different-addressed automatic load boards.
And each automatic load board communicates with a DUT according to the instructions from the upper computer.
Achieving node message simulation (i.e., real-time simulation of other ECU nodes and sending periodic CAN messages to the ACU under test)，fault diagnosis, voltage measurement, etc.
The nodes in the CAN network are various ECU modules.Such as EMS engine management module/ESP electronic stability system module, ABS anti-lock module, BCM body control
module...
The automatic load boards need to simulate similar nodes sending various application messages to the ACU.
2. Programmable power supply 1u Lambda It is used to provide different voltages for the ACU during the test (9-16V);
3. CN120- wiring harness One end of the wiring harness is connected to the DV station, and the other end is connected to the ACU under test.
4. Automatic load board The current system test software can configure up to 12 boards, and can be expanded with several or fewer units according to customer needs.
Each load board has a unique address and is fixedly installed in the corresponding slot position.
The specific functions are described on the next page.
4. The automatic load board function refers to the content of the DV station test project
Simulating the normal resistance for deployment loops,
Simulating high resistance/low resistance/short to Vbat/short to GND fault for deployment loops,
Simulating peripheral acceleration sensor open/short to Vbat/short to GND faults for peripheral acceleration sensor,Simulating various IO loads – such as ENS/PADI/PACS/Buckle Switch/SBR…
Simulating open/short circuit faults for various IO loads – such as ENS/PADI/PACS/Buckle Switch/SBR…
Simulating ACU requires receiving periodic messages from other nodes,
Acquire voltage/current of the loop/acceleration sensor/IO.
5. Software design and control process
6. lead time assessment and project schedule
Due to the long delivery cycle of some components and boards, the lead time is around 3 to 6 months.
The project progress is shown in the table below.
If you have any questions, please feel free to contact us, thank you.
Contact person：Sherwin Luo
Mobil: +86-13524766010
Tel: +86-21-34316920
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MAUTECKK Electronics Technology CO., Ltd