# How to use aiPerception or pawn sensing into a child actor

**URL:** <https://forums.unrealengine.com/t/how-to-use-aiperception-or-pawn-sensing-into-a-child-actor/397725>\
**Category:** Blueprint\
**Tags:** aiperception, child-actors, unreal-engine, pawn-sensing, Blueprint, question\
**Created:** [July 21, 2017, 1:10pm UTC](https://forums.unrealengine.com/t/how-to-use-aiperception-or-pawn-sensing-into-a-child-actor/397725 "2017-07-21T13:10:33Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![cgiles](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@cgiles](https://forums.unrealengine.com/u/cgiles)\
**Post date:** [July 21, 2017, 1:10pm UTC](https://forums.unrealengine.com/t/how-to-use-aiperception-or-pawn-sensing-into-a-child-actor/397725/1 "2017-07-21T13:10:33Z")

</div>

Hello

I’m building a turret, so I have three part, the base which is the root of my parent bluerprint, the holder, which rotate around the z axis, and the canon which is the child of the holder, and rotate on the Y axis, and is a childactor

I have this :

![192448-captureue4.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/5/0/e/50ecbb8074864b073acad0a8d85c850bcd66e490.png)

The canon is controlled by an AI controller, and have a pawnsensing as component.

When I place directly the canon blueprint in the level, it works well.

When I place the whole turret blueprint in the level, the pawnsensor or aiperception inits, but become blind instantly.

The AI perception detects the parent, the BP\_Turretv2, and nothing else.

Is there a way to make the sensors in the child actor or is AI controller able to sense what happens in the level ?

I know I can place my aicontroller on the turret, instead of the canon, but I wouldn’t be able to make it look where the canon aims.

If I’m not clear, or you need more information, say it, and I will try to comply.