Next Article in Journal
Wavelength Selection FOR Rapid Identification of Different Particle Size Fractions of Milk Powder Using Hyperspectral Imaging
Next Article in Special Issue
Structural Model Identification Using a Modified Electromagnetism-Like Mechanism Algorithm
Previous Article in Journal
Characterization of Second-Order Reflection Bands from a Cholesteric Liquid Crystal Cell Based on a Wavelength-Swept Laser
Previous Article in Special Issue
Performance Evaluation of a Carbon Nanotube Sensor for Fatigue Crack Monitoring of Metal Structures
Open AccessArticle

A Novel Sensor Prototype with Enhanced and Adaptive Sensitivity Based on Negative Stiffness Mechanism

by Lijun Liu 1, Yongzhong Nie 2 and Ying Lei 1,*
1
Department of Civil Engineering, Xiamen University, Xiamen 361005, China
2
FATRI (Xiamen) Technologies Co., Ltd., Xiamen 361000, China
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(16), 4644; https://doi.org/10.3390/s20164644
Received: 16 June 2020 / Revised: 13 August 2020 / Accepted: 13 August 2020 / Published: 18 August 2020
(This article belongs to the Special Issue Innovative Sensors for Civil Infrastructure Condition Assessment)
Loess–mudstone/soil-rock interfacial landslide is one of the prominent landslide hazards that occurs in soil rock contacting zones. It is necessary to develop sensors with high sensitivity to weak and low frequency vibrations for the early warning of such interfacial landslides. In this paper, a novel monitoring sensor prototype with enhanced and adaptive sensitivity is developed for this purpose. The novelty of the sensitive sensor is based on the variable capacitances and negative stiffness mechanism due to the electric filed forces on the vibrating plate. Owing to the feedback control of adjustable electrostatic field by an embedded micro controller, the sensor has adaptive amplification characteristics with high sensitivity to weak and low frequency input and low sensitivity to high input. The design and manufacture of the proposed sensor prototype by Micro-Electro-Mechanical Systems (MEMS) with proper packaging are introduced. Post-signal processing is also presented. Some preliminary testing of the prototype and experimental monitoring of sand interfacial slide which mimics soil–rock interfacial landslide were performed to demonstrate the performance of the developed sensor prototype with adaptive amplification and enhanced sensitivity. View Full-Text
Keywords: sensor; negative stiffness; weak signal; adaptive sensitivity; micro controller; feedback control; adaptive amplification sensor; negative stiffness; weak signal; adaptive sensitivity; micro controller; feedback control; adaptive amplification
Show Figures

Figure 1

MDPI and ACS Style

Liu, L.; Nie, Y.; Lei, Y. A Novel Sensor Prototype with Enhanced and Adaptive Sensitivity Based on Negative Stiffness Mechanism. Sensors 2020, 20, 4644.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop