Self-driven transient stress sensing device

Abstract

According to the present invention, by utilizing the characteristics of an electret material, an efficient contact-separation type friction nanometer generator is formed between a stress applying object and a sensing device contact layer, and is combined with the light emitting diodes skillfully, so that a self driven visual stress sensing device is constructed. Each light emitting diode corresponds to a friction nanometer generator unit, and when the external stress is applied to a contact layer of a sensor, a generated corresponding output signal drives the corresponding diode to emit light. The luminous intensity of the diodes is increased along with the increase of the applied stress, and the stress can be determined by analyzing the luminous intensity of the diodes, thereby realizing the visualization of the stress sensing. A stress visual device of the present invention has the characteristic of self-driven output, can analyze the external stress without needing an external power supply, and can be used to detect the spatial distribution of pressure.

Description

technical field The present invention relates to a stress sensing device, in particular to a self-driven transient stress sensing device. Background technique The existing transient stress sensing technology is mainly based on two kinds: (1) using field-effect transistors to modulate the channel resistance under different pressures to realize the sensing of external pressure; (2) using the piezoelectric photoelectron effect to The modulation of nanowire resistance is used to realize the sensing of external pressure. However, these two technologies all need an external power supply as the energy supply unit of the device, and if there is no power supply, they cannot work normally. This greatly limits the development and application of these pressure sensing technologies. The development of a transient pressure sensing technology that can work without an external power supply is the key to solving the above problems, and the successful development of triboelectric nanogene...

AI Technical Summary

Problems solved by technology

However, due to the low current output density of contact triboelectric nanogenerators, a large area is generally required t...

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