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A flexible tactile sensor based on piezoelectric film and its signal processing system

A technology of tactile sensor and piezoelectric film, which is applied in the field of piezoelectric tactile sensor to reduce hysteresis, realize wireless real-time information transmission and synchronous display, and improve the effect of perception function

Active Publication Date: 2020-08-25
SHANGHAI RES INST OF MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Finally, there is the issue of cost. Only sensors with low cost, wear resistance, high repeatability and low hysteresis can successfully enter the market

Method used

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  • A flexible tactile sensor based on piezoelectric film and its signal processing system
  • A flexible tactile sensor based on piezoelectric film and its signal processing system
  • A flexible tactile sensor based on piezoelectric film and its signal processing system

Examples

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Embodiment 1

[0048] A flexible tactile sensor based on piezoelectric film, such as Figure 1~3 As shown, it includes a metal substrate 1 and a piezoelectric film 2, a flexible body 4 and a protective layer 5 arranged on both sides of the metal substrate in sequence from the inside to the outside. Both sides of the metal substrate 1 are provided with metal electrodes 6 and protrusions 7 .

[0049]In this embodiment, the sensor also includes a gasket 3, which is arranged between the flexible body 4 on both sides of the metal substrate 1, and is located on the outside of the metal substrate 1 and the piezoelectric film 2, and is used for the metal electrode 6 and the bump Up to 7 provide space. It is further preferred that there are two spacers 3, which are arranged on the outsides of the two opposite sides of the metal substrate 1 and the piezoelectric film 2. The outer full length of the opposite side is set.

[0050] The flexible body 4 in this embodiment is provided with a tooth-like st...

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Abstract

The invention relates to a flexible touch sensor based on a piezoelectric film and a signal processing system thereof. The flexible touch sensor comprises a metal substrate and also comprises a piezoelectric film, a flexible body and a protective layer which are orderly arranged on two sides of the metal substrate from the inside to the outside. Two sides of the metal substrate are provided with metal electrodes and protrusions, and the flexible body is provided with a tooth-shaped structure layer. Compared with the prior art, the piezoelectric film continuously vibrates under the under the action of elasticity by the protrusions, a sensing signal is repeated, the piezoelectric film can contact the sensing signal in first time through the tooth-shaped structure layer of the flexible body,the hysteresis of the signal is reduced, at the same time, the sensing function is improved, pressure magnitude and azimuth can be accurately identified, the measurement range is 0 to 1800 kpa, and the whole range of human-computer interaction is covered. The signal processing system has good stability and sensitivity, timely and accurate external tactile and pressure information can be provided for an intelligent robot, and the invention has great significance for the research of the intelligent robot.

Description

technical field [0001] The invention relates to the technical field of piezoelectric tactile sensors, in particular to a flexible tactile sensor based on piezoelectric film and a signal processing system thereof. Background technique [0002] Piezoelectric materials are important functional materials to realize the conversion between mechanical energy and electrical energy. [0003] Commonly used piezoelectric ceramic materials have the advantages of excellent piezoelectric performance, low dielectric loss, and large electromechanical coupling coefficient, and are widely used in piezoelectric transducers, sensors, etc. [0004] Piezoelectric films based on piezoceramics have unique properties, and as a dynamic strain sensor, they are very suitable for monitoring vital signs on the surface of human skin or implanted in the human body. Some thin-film elements are sensitive enough to detect a human pulse through a jacket. [0005] When stretching or bending a piece of piezoel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/16
CPCG01L1/16
Inventor 曾涛赵程陈昊李丽琛付栖勇张刚华吴寒西子
Owner SHANGHAI RES INST OF MATERIALS CO LTD
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