Method and apparatus for assisting a positioning of a hand of a user with respect to a recognition sequence and acoustic system for contactless detection of a biometric feature of the hand, as well as means of locomotion with such a device

摘要

The present invention relates to a method for assisting a positioning of a hand (h) of a user with respect to a recognition sequence and acoustic system (10) for contactless detection of a biometric feature of the hand (h). The method comprises the step of outputting (300) an indication to the user with respect to a suitable removal of the hand (h) of a contactless sensor (11) of the recognition sequence and acoustic system (10) by means of a floating image (80) and / or a by means of the hand (h) rhetoric haptic field, in particular a haptically by means of the hand (h) rhetoric ultrasonic pulse (90).