With the continuous development of embedded systems, traditional embedded development is far from meeting new requirements. It is necessary to use the powerful system design capabilities of IJ1 to solve the problem of low efficiency. However, standard UML does not provide sufficient support in multi-system-level task concurrency, synchronization between tasks, system simulation and real-time performance, and it is difficult to directly apply it to the design of embedded systems. This paper studies a method that combines time-constrained Petri nets with extended UML. By using Petri\'s ability to describe asynchrony and concurrency to extend UML\'s stereotypes and flow charts, and by converting UML into Petri diagrams, the powerful theoretical system of Petri can be used to verify the correctness of IM.
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