Vehicle Sensor Simulation Timing for Synchronized Image Output
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Solution Overview
Problem
In co-simulation systems, achieving synchronous data transmission between environment and sensor simulators is challenging due to differing clock periods, which can result in outdated data transmission and reduced synchronization.
Innovation Solution
A simulation device comprising an environment simulator and a sensor simulator, where the environment simulator determines and transmits data at simulation clock times, and the sensor simulator outputs image data at sensor clock times, with information about sensor clock times stored in the environment simulator to ensure optimal synchronization and up-to-date data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data is transmitted at simulation clock times, then the environment simulator can operate at its own timing, but the data may become outdated when transmitted to the sensor simulator
Solution Approach 1:
The environment simulator stores environment data in advance at simulation clock times, making it ready for later retrieval and transmission at sensor clock times. This preliminary storage action allows the system to maintain high simulation speed while ensuring data is available when needed by the sensor simulator, preventing data outdatedness.
2Reliability
If the environment simulator stores information about sensor clock times, then data transmission can be synchronized, but the complexity of the environment simulator increases
Solution Approach 1:
The environment simulator acts as an intermediary that stores both environment data and sensor clock time information. By maintaining this dual storage, the environment simulator can retrieve and transmit data precisely aligned with sensor clock times, ensuring synchronization accuracy while managing its own complexity through organized data structures.
3Object-affected harmful factors
If real vehicle testing is reduced in favor of simulation, then safety risks are reduced, but the realism of test conditions may be compromised
Solution Approach 1:
The simulation device creates a virtual copy of the vehicle environment, sensors, and data flow that mirrors real-world conditions. By copying the essential characteristics of real vehicle operations into the simulation, the system maintains test realism while eliminating the safety risks associated with actual vehicle testing.
Data Source
AI summary
A simulation device and a method for outputting image data from a virtual environment of a vehicle to a control unit is proposed, which are designed to perform at least one vehicle function dependent on the image data. An environment simulator is configured to simulate the environment of the vehicle, and transmits data about the environment to a sensor simulator, which is configured to simulate at least one sensor of the vehicle dependent on the data about the environment for detecting the environment and to output the image data dependent on its simulation. The environment simulator is designed to determine the data about the environment at simulation clock times and to transmit these to the sensor simulator dependent on the simulation clock times, and wherein the sensor simulator is configured to output the image data at sensor clock times.