A Seismic Data Acquisition System Based on Wireless Network Transmission

Abstract

A seismic data acquisition system based on wireless network transmission is designed to improve the low-frequency response and low sensitivity of the existing acquisition system. The system comprises of a piezoelectric transducer, a high-resolution data acquisition system, and a wireless communication module. A seismic piezoelectric transducer based on a piezoelectric simply supported beam using PMN-PT is proposed. High sensitivity is obtained by using a new piezoelectric material PMN-PT, and a simply supported beam matching with the PMN-PT wafer is designed, which can provide a good low-frequency response. The data acquisition system includes an electronic circuit for charge conversion, filtering, and amplification, an FPGA, and a 24-bit analog-to-digital converter (ADC). The wireless communication was based on the ZigBee modules and the WiFi modules. The experimental results show that the application of the piezoelectric simply supported beam based on PMN-PT can effectively improve the sensitivity of the piezoelectric accelerometer by more than 190%, compared with the traditional PZT material. At low frequencies, the fidelity of the PMN-PT piezoelectric simply supported beam is better than that of a traditional central compressed model, which is an effective expansion of the bandwidth to the low-frequency region. The charge conversion, filtering, amplification, and digitization of the output signal of the piezoelectric transducer are processed and, finally, are wirelessly transmitted to the monitoring centre, achieving the design of a seismic data acquisition system based on wireless transmission.

Design of multi-channel signal acquisition system based on LTC2325

“…With the development of detection technology, higher and higher requirements are put forward for the performance of detection system. [5][6] At present, common data acquisition systems have problems such as poor acquisition accuracy and low acquisition rate [7]. In this paper, LTC2325-14 from Analog Device is used as the main chip of the AD module and Zynq-7020 is used as the signal processing chip.…”

Design and Implementation of a Wireless Recorder System for Seismic Noise Array Measurements

“…All this, together with the growing development of microcontrollers and open-source electronic platforms, has led to the development of ad hoc seismic recorders by some researchers. Many of them are focused on the measurements of a vertical sensor, e.g., [ 22 , 23 ], the measurements of three components for subsequent H/V analysis, e.g., [ 24 , 25 , 26 ], geophysical exploration, e.g., [ 27 , 28 ], seismic monitoring in buildings, e.g., [ 29 , 30 , 31 ], etc.…”