A High Performance Piezoelectric Sensor for Dynamic Force Monitoring of Landslide

Abstract

Due to the increasing influence of human engineering activities, it is important to monitor the transient disturbance during the evolution process of landslide. For this purpose, a high-performance piezoelectric sensor is presented in this paper. To adapt the high static and dynamic stress environment in slope engineering, two key techniques, namely, the self-structure pressure distribution method (SSPDM) and the capacitive circuit voltage distribution method (CCVDM) are employed in the design of the sensor. The SSPDM can greatly improve the compressive capacity and the CCVDM can quantitatively decrease the high direct response voltage. Then, the calibration experiments are conducted via the independently invented static and transient mechanism since the conventional testing machines cannot match the calibration requirements. The sensitivity coefficient is obtained and the results reveal that the sensor has the characteristics of high compressive capacity, stable sensitivities under different static preload levels and wide-range dynamic measuring linearity. Finally, to reduce the measuring error caused by charge leakage of the piezoelectric element, a low-frequency correction method is proposed and experimental verified. Therefore, with the satisfactory static and dynamic properties and the improving low-frequency measuring reliability, the sensor can complement dynamic monitoring capability of the existing landslide monitoring and forecasting system.

A Review of Wearable Sensor Systems to Monitor Plantar Loading in the Assessment of Diabetic Foot Ulcers

“…Piezoelectric sensors feature high sensitivity and can be fabricated using well understood techniques. However, it remains challenging to obtain multiaxial measurements from these systems, particularly within the size constraints required for plantar force monitoring applications [95].…”

A Novel Acoustic Filtering Sensor for Real-Time Tension Monitoring of Hoist Wire Ropes

“…The calibration experiments are necessary for the sensors before their practical engineering applications [ 15 ]. The purpose of the calibration for the sensor in this paper is to obtain the relation between the input physical parameter and the output parameter, that is, tension and voltage.…”

“…In [ 13 ], Yang et al applied a vibration acceleration sensor with the built-in integrated circuit amplifier to adjust vibration signals. Moreover, some studies [ 14 , 15 ] are introduced from the aspect of structure design. With the development of research, the back propagation neural network (BPNN) [ 16 ] has been gradually employed to process measurement signals and achieves high accuracy.…”

Thermal Infrared Imagery Integrated with Terrestrial Laser Scanning and Particle Tracking Velocimetry for Characterization of Landslide Model Failure

“…The feasibility of monitoring using the elastic wave velocity technique has been explored by Chen et al [23]. A new piezoelectric sensor employing self-structure pressure distribution and capacitive circuit voltage distribution methods has been presented by Li et al for monitoring dynamic force in a laboratory model test [24].…”