A Wrapped Biomimetic Flexible Sensor for Multimodal Information Measurement

Abstract

The invention discloses a coated bionic flexible sensor for multi-modal information measurement, relates to the technical field of flexible sensors, and includes a base part and a strain sensing part; the base part includes a flexible body and cracks, and the cracks are provided with multiple, multiple The cracks are staggered along the outer wall of the flexible body; the strain-sensing part is embedded between the cracks on the outer wall of the flexible body. The strain-sensing part includes a sensitive unit, a lead wire, an electrode, and an insulating wrapping layer. The sensitive unit is arranged along the axis of the flexible body. On both sides of the unit, the sensitive unit, leads and electrodes are encapsulated by an insulating wrapping layer. The invention has the advantages of low cost, no pollution, simple and convenient manufacturing process, high sensitivity and high precision, and can realize the detection of rotation angle in any direction, continuous change of spatial curvature, diameter change and force signals at different positions of the measured piece.

Description

technical field [0001] The invention relates to the technical field of flexible sensors, in particular to a covered bionic flexible sensor for multi-modal information measurement. Background technique [0002] In recent years, with the development of new materials and rapid prototyping technology, it has become one of the hot research directions in the field of soft robots to imitate the structural and functional characteristics of natural molluscs to make soft robots. Soft robots have advantages such as compliance, safety, and arbitrary deformation that mainstream rigid devices do not have. They have broad application prospects in industrial production, safe human-computer interaction, and complex environment detection. At present, due to the high compliance of soft robots, it is difficult to integrate traditional rigid force sensors, encoders and other sensor devices into the soft robot body, making its shape and position detection a difficult problem and an important fact...

AI Technical Summary

Problems solved by technology

At present, due to the high compliance of soft robots, it is difficult to integrate traditional rigid force sensors, encoders and other sensor devices into the soft robot body, making its shape and position detection a difficult problem and an important factor restricting its development.

[0003] At this stage, most flexible sensors adopt the structure of flexible substrate plus conductive materials, such as Yong-Lae Park et al. (Design and Fabrication of Soft Artificial Skin Using Embedded Microchannels and Liquid Conductors); R. Adam Bilodeau et al. (Monolithic Fabrication of Sensors and Actuators in a Soft Robotic Gripper); Selim Ozel et al. (Apreciseeembedded curvature sensor module for soft-bodied robots); Helena Moreira et al. (Electron transport in gold collagen nanoparticle-based strain gauges) and other research groups have proposed different forms of flexible sensors with high sensitivity , by depositing or embedding micro-nano-scale conductive particles or conductive liquid into the flexible substrate, when the flexible substrate deforms, it will cause changes in the electrical signals such as the resistance value and capacitance of the conductive material, so as to realize the sensor's ability to bend and stretch And the detection of stress and other information; however, the above-mentioned flexible sensors mostly use micro-nano-scale conductive materials, and the price is relatively high; while the flexible sensors in the form of conductive liquid are prone to failure due to excessive deformation and insufficient carrying capacity; and the above-mentioned flexible sensors Most of the sensors are sensors in the form of one-dimensional signal detection

Patent CN107576258 A published "A Soft Sensor for Measuring Continuous Diameter Changes". The sensor described in this patent has simple structure, high precision and good repeatability, but it can only be used for continuous diameter changes of soft cylindrical cavity parts. Measurement; patent CN110595512 A announced "A Flexible Piezoelectric Sensor and Manufacturing Method", the sensor described in the patent uses flexible piezoelectric materials, and the manufacturing process has a high degree of automation; 》, the sensor described in this patent is made of single crystal silicon material through MEMS technology, which can realize the detection of three-dimensional force information; however, none of the sensors described in the above patent can realize the detection of other modal information such as space curvature and rotation angle of the measured object

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