How to get the position of a sprite frame component?

Cocos Creator
#1

@property({type : SpriteComponent})
public plane : SpriteComponent|null = null;

private score = 0;

update(deltaTime: number) {

    let lblScore = this.node.getComponent(Label);

    **if(this.plane.position.x > 113 && this.plane.position.x < 130)**

    {

        this.score += 1;

        lblScore.string = "Score : " + this.score;

    }

   

}

}

In the above code when ‘plane’ spritecomponent reaches certain position i want to update the score value. but “this.plane.position.x” doesn’t seem to work!!
what is the reason ? how do i get its position?

#2

plane.node.position