Driver Assistance System Testing via External Reference Device
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Solution Overview
Problem
Driver assistance systems in vehicles are not regularly tested for functionality during their service life, leading to potential malfunctions due to aging or mechanical damage, which can pose safety risks if not detected in time.
Innovation Solution
A method involving an external sensor system to stimulate the driver assistance system, process the stimulation, transmit data to a reference device for comparison with a desired response, and identify any malfunctions, allowing for regular testing and prevention of unsafe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If driver assistance systems are not regularly tested during service life, then device complexity and costs are reduced, but reliability deteriorates due to undetected malfunctions from aging or damage
Solution Approach 1:
An external reference device is introduced as an intermediary to receive sensor data from the driver assistance system, store reference responses for various stimulations, and compare current system responses against these references. This external mediator handles the complexity of testing infrastructure separately from the vehicle's driver assistance system, enabling reliability verification without adding complexity to the core system.
Solution Approach 2:
Reference responses for various stimulations are pre-calculated and stored in the external reference device during system development or calibration. This preliminary action allows the testing mechanism to be established in advance, enabling straightforward comparison with current system performance during service life without requiring complex real-time analysis infrastructure.
2Reliability
If redundant control devices are provided to ensure functionality, then reliability is improved, but device complexity and installation space requirements increase
Solution Approach 1:
Instead of physically duplicating control devices, the invention creates a virtual copy of the desired system response by storing reference responses in an external database. The reference device retrieves and compares these stored reference responses with current system outputs, achieving functional verification without requiring redundant physical hardware in the vehicle.
3Reliability
If regular function testing is implemented during service life, then reliability is improved through early malfunction detection, but loss of time and operational disruption increase
Solution Approach 1:
The testing mechanism operates continuously in the background during normal system operation. The driver assistance system continues to process sensor data and generate responses while the reference device simultaneously compares these responses against stored references, enabling testing without interrupting the useful action of the driver assistance system.
Solution Approach 2:
The driver assistance system itself provides the test data by continuing to operate normally and generate sensor responses. The system serves its primary function while simultaneously providing the data needed for self-verification through comparison with reference responses stored in the external device, eliminating the need for separate dedicated testing operations.
Data Source
AI summary
A method for testing the function of a driver assistance system of a vehicle, wherein an environment of the vehicle is detected by means of a sensor system, includes the following steps: stimulating the driver assistance system by means of an external stimulation; processing the stimulation in the driver assistance system so that a stimulation response is obtained; transmitting the stimulation and/or information relating to the stimulation to an external reference device and determining a reference response for the stimulation in the external reference device in accordance with a desired state of the driver assistance system; and comparing the stimulation response with the reference response. The invention enables the functionality of a driver assistance system of a vehicle to be tested in a simple and cost-effective manner.