Wide‐Range Sensitivity Modulation in Liquid‐Metal Strain Sensors via Slit Structure

ABSTRACT Stretchable strain sensors are ideal for monitoring the deformation in soft materials with irregular surfaces. While the sensitivity of certain sensors can be modified by altering structure and materials, these modifications cannot achieve wide‐range sensitivity control. Here, by integrating high‐modulus materials into liquid metal strain sensors, we constructed a slit structure that forms a stress concentration area, thereby amplifying minute deformations. By changing the slit width, we achieved a sensitivity adjustment of approximately 30 times. After installing the liquid metal sensor with enhanced sensitivity on the bow arm, it can be used to accurately monitor the archery process. We further developed a suspension‐bridge–inspired pressure sensor array that separates the pressure point from the sensitive part. This capability enables installation on badminton rackets for detecting both landing points and impact forces exerted by badminton shuttles, effectively preventing direct contact damage to the sensitive material from badminton impact.