Electronic execution unit working state self-holding protection circuit and system

Abstract

The invention discloses an electronic execution unit working state self-holding protection circuit and system. The self-holding protection circuit comprises an electronic execution unit working statesignal end, at least two logic signal input ends of the self-holding protection circuit, a logic operation circuit used for carrying out logic operation output on at least two logic input signals anda trigger circuit. By means of the logic operation circuit and the trigger circuit, the working state of the electronic execution unit working state signal end is not influenced when a microcontrolleris subjected to multiple transient anomalies. Even if an output signal of the microcontroller is abnormal, the working state of an execution unit is not influenced. When the microcontroller returns to normal, the working state of the current execution unit can be identified, and a correct control instruction is continuously given.

Description

Technical field [0001] The invention belongs to the protection technology of an industrial control electronic execution unit, and particularly relates to a self-maintaining control technology of the state of the electronic execution unit. Background technique [0002] In the field of industrial control, the working status of the electronic execution unit is the most important. Wrong execution may cause serious consequences. Especially in the automotive industry, the working status of the electronic execution unit is related to the safety of people and vehicles. A little carelessness can lead to tragic accidents that cause car crashes and deaths. For example, for the electronic system of a new energy vehicle, if the vehicle is running at a high speed, the relay execution unit of the high-voltage main circuit is disconnected due to the abnormality of the micro-control system, which will cause the entire vehicle to lose high-voltage power and cause the vehicle to lose control. [00...

AI Technical Summary

Problems solved by technology

Although the structure is simple, its stability is poor. Once there is a problem with the time domain signal, the device will fail

Not suitable for complex control systems of new energy vehicles

[0004] CN105553079A A power-down protection device for a new energy vehicle controller and a new energy vehicle, it only realizes the power-down protection of the vehicle, and cannot solve the protection when the output signal of the microcontroller is abnormal

[0005] In the past vehicle-mounted control circuits, some types of microcontrollers may send out unstable state signals when initializing (such as figure 1 above picture)

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