As an important part of wearable devices, flexible tactile sensors have attracted extensive attention from society and researchers. However, the existing flexible tactile sensors have problems such as small force measurement range and single detection direction, so it is very important to study large-range multi-direction force tactile sensors. Designed with large load range, high sensitivity which can realize the three dimensional force test of flexible tactile sensor. The sensor is composed of a silicone elastomer shell, an embedded NdFeB silicone elastomer magnetic cylinder and a tunnel reluctance element array at the bottom. The experimental results show that the tactile sensor can recognize the normal force in the range of 0–50 N and the tangential force in the range of 0–10 N, and the three-dimensional force direction can be judged. The sensor also has good dynamic performance, in the normal force loading and unloading experiments, the response time and recovery time are 42 ms and 40 ms, respectively, with good response and recovery ability. the sensitivity of normal force in the range of 0–30 N and 30–50 N is 11.51 mV/N and 3.03 mV/N, and the tangential force is 15.82 mV/N. This paper lays a foundation for further research on tactile sensors that can detect spatial triaxial forces.

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Structure Design and Output Characteristics of Hemispherical Tactile Sensor for 3D Force Detection

  • Xiaotao Du,
  • Ling Weng,
  • Shichao Zuo,
  • Bowen Cui,
  • Xiaopeng Ji,
  • Lanyang Hao

摘要

As an important part of wearable devices, flexible tactile sensors have attracted extensive attention from society and researchers. However, the existing flexible tactile sensors have problems such as small force measurement range and single detection direction, so it is very important to study large-range multi-direction force tactile sensors. Designed with large load range, high sensitivity which can realize the three dimensional force test of flexible tactile sensor. The sensor is composed of a silicone elastomer shell, an embedded NdFeB silicone elastomer magnetic cylinder and a tunnel reluctance element array at the bottom. The experimental results show that the tactile sensor can recognize the normal force in the range of 0–50 N and the tangential force in the range of 0–10 N, and the three-dimensional force direction can be judged. The sensor also has good dynamic performance, in the normal force loading and unloading experiments, the response time and recovery time are 42 ms and 40 ms, respectively, with good response and recovery ability. the sensitivity of normal force in the range of 0–30 N and 30–50 N is 11.51 mV/N and 3.03 mV/N, and the tangential force is 15.82 mV/N. This paper lays a foundation for further research on tactile sensors that can detect spatial triaxial forces.