A static pressure balance type underwater self-driven flexible touch pressure finger and a pressure measurement method

By combining a piezoelectric transducer and a Pascal stroke amplification mechanism, and utilizing the elastic deformation of a flexible hose and the principle of the double electric layer at the solid-liquid interface, the problem of tactile sensors not functioning properly in deep-sea environments was solved, enabling stable measurement of pressure signals and effective obstacle avoidance for underwater manipulators.

CN116773055BActive Publication Date: 2026-06-26DALIAN MARITIME UNIVERSITY
2 Cites 0 Cited by

Patent Information

Application Number
CN202310677001.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-06-08
Publication Date
2026-06-26
Estimated Expiration
2043-06-08

AI Technical Summary

Technical Problem

Existing tactile sensors in deep-sea environments cannot function properly due to excessive internal and external pressure differences, thus failing to effectively sense the pressure of the deep-sea environment.

Method used

By combining a piezoelectric transducer and a Pascal stroke amplification mechanism, the pressure signal is converted into an ion current signal through the elastic deformation of the flexible hose and the principle of the double electric layer at the solid-liquid interface, thus realizing the sensing, amplification and measurement of the pressure signal.

Benefits of technology

Stable measurement of pressure signals was achieved in the deep-sea environment, eliminating hydrostatic interference. This technology is suitable for tactile sensing in underwater robotic arms and improves the obstacle avoidance capabilities of underwater robots.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The application provides a static pressure balance type underwater self-driven flexible touch pressure sensing finger, which comprises a touch pressure sensing unit, a hydraulic cylinder, a pressure transmission unit, a piezoelectric transducing unit, a transducing unit support, a platinum electrode and a base, the touch pressure sensing unit and the pressure transmission unit are connected with the hydraulic cylinder through bolts, and the oil cavity between the piston end faces is filled with hydraulic oil; the piezoelectric transducing unit is inserted into the stepped through hole in the cylinder wall of the transducing unit support; the pressure transmission unit and the base are connected with the transducing unit support through a flange and a threaded pair; the platinum electrode is fixed in the lead hole of the piezoelectric transducing unit, and the lead of the platinum electrode is led out from the lead hole of the base and connected to a pressure detection circuit. Based on the area effect of Pascal's principle and the solid-liquid interface double electric layer principle, the application can convert the tiny pressure detected by the finger tip into a larger elastic deformation of the flexible hose, so as to generate a high-amplitude ionic current signal and transmit it to the pressure detection circuit, and realize the sensing, amplification and measurement of the pressure signal.
Need to check novelty before this filing date? Find Prior Art