Tactile sensing is very important for human–machine interaction. A new non-array flexible touching sensor based on variation of electrical impedance distribution (VEID) is proposed to detect position and pressure of external touching. The sensor includes two layers of piezoresistive film, and there are 16 electrodes at the inner and boundary of the film. Two of the electrodes are used for stimulation, and the others are used for monitoring. When the sensor is exposed to different touching, the monitoring electrodes will output different signals. The SVM algorithm is adopted for modeling the relation between the different touching and signals of the monitoring electrodes. Experiments are performed to evaluate the sensor’s ability, and the results show that the fabricated sensor can distinguish different touching position and different pressure of the loads with high accuracy. Moreover, the sensor is flexible, easy to fabricate, and can be used for different scenarios for human–machine interaction.

触觉感知对于人机交互非常重要。提出了一种基于电阻抗分布（VEID）变化的非阵列柔性触摸传感器来检测外部触摸的位置和压力​​。传感器包括两层压阻薄膜，薄膜内部和边界有16个电极。其中两个电极用于刺激，其他电极用于监测。当传感器受到不同的触摸时，监测电极会输出不同的信号。采用SVM算法对监测电极的不同触摸和信号之间的关系进行建模。进行实验以评估传感器的能力，结果表明，所制作的传感器可以高精度区分负载的不同接触位置和不同压力。此外，该传感器灵活，易于制造，可用于不同的人机交互场景。