An RF Amplifier Circuit for Enhancement of Echo Signal Detection in Bathymetric LiDAR

The echo signal from the water bottom in bathymetric light detection and ranging (LiDAR) onboard unmanned boat is very weak. As a result, the signal's amplitude cannot be resampled using an AD sampling module after being detected by the photomultiplier tube (PMT). Additionally, the traditional...

Full description

Saved in:
Bibliographic Details
Published in:IEEE sensors journal 2022-11, Vol.22 (21), p.1-1
Main Authors: Zhou, Guoqing, Zhao, Dawei, Zhou, Xiang, Xu, Chao, Liu, Zhexian, Wu, Gongbei, Lin, Jinchun, Zhang, Haotian, Yang, Jiazhi, Nong, Xueqin, Zou, Liping
Format: Article
Language:English
Subjects:
Amplification
Amplifiers
Amplitudes
Bandwidth
Bandwidths
bathymetric LiDAR
Circuits
Echo signals
Electromagnetic fields
Gain
Laboratories
Laser radar
Lidar
photomultiplier tube (PMT)
Photomultiplier tubes
Ponds
Radio frequency
RF amplifier
Sensors
Signal detection
Signal generators
Static electricity
Surface emitting lasers
Voltage regulators
Water tanks
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The echo signal from the water bottom in bathymetric light detection and ranging (LiDAR) onboard unmanned boat is very weak. As a result, the signal's amplitude cannot be resampled using an AD sampling module after being detected by the photomultiplier tube (PMT). Additionally, the traditional methods, which adopt the trans-impedance circuit, cannot provide sufficient gain and bandwidth, resulting in incorrect detection of echo signals. For the reasons above, this paper presents an RF amplifier circuit for signal amplification, in which a DC paranoid network associated with a matching circuit is used to ensure the stable operation of the circuit; the AC-coupled and low-noise voltage stabilizers are adopted to ensure a low-noise signal output; the shielding is adopted to suppress the interference of electromagnetic fields and static electricity. The validations are conducted in indoor and outdoor laboratories, including a simulated amplitude and bandwidth using a signal generator in the indoor laboratory, the water tank, the test well, the pond, and the pool. The experimental results show that the proposed RF amplifier circuit can amply the gain of 25.31 dB when using a signal generator in the bandwidth range of 500MHz, 650 MHz, 800 MHz, 1G1Hz, and 34.63dB, 31.62 dB, 25.78 dB under the experiments in the water tank, in the test well, in the pond when the PMT control voltages are 0.4V, 0.5V, 0.7V, respectively, and amplify the echo signals to 451-568mV under the bandwidth of 500MHz.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2022.3206763