Performance verification of staring laser active imaging system

Zheng-ping, 徐正平 Xu; Yong-sen, 许永森 Xu; Yuan, 姚园 Yao; Gang, 李刚 Li; Lei, 石磊 Shi; He, 孙 翯 Sun; Xiao, 于 潇 Yu; Hong-hai, 沈宏海 Shen

doi:10.3788/ope.20172506.1441

Cited by 4 publications

(1 citation statement)

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“…To meet the needs of the practical application, the amplifying circuit needs to have a sufficiently high magnification and bandwidth. OPA657 has the characteristics of 1.6 GHz gain bandwidth product, low-voltage noise of

, etc., [ 30 ] through the ratio of the reverse input resistance R 1 and feedback resistance R f to control the gain change. There is a simplified linear relationship between the ( R 1 + R f )/ R 1 ratio and the magnification of the OPA657 operational amplifier.…”

Section: Description Of the Ultrasonic Detection Systemmentioning

confidence: 99%

Design and Performance Analysis of an Ultrasonic System for Health Monitoring of Concrete Structure

Zhao

Zheng

et al. 2021

Sensors

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The development and research of an ultrasonic-based concrete structural health monitoring system encounters a variety of problems, such as demands of decreasing complexity, high accuracy, and extendable system output. Aiming at these requirements, a low-cost extendable system based on FPGA with adjustable system output has been designed, and the performance has been evaluated by different assessment parameters set in this paper. Besides the description of the designed system and the experiments in air medium, the residual similarity and Pearson correlation coefficients of experimental and theoretical data have been used to evaluate the submodules’ output. The output performance of the overall system is evaluated by the Pearson correlation coefficient, root-mean-square error (RMSE), and magnitude-squared coherence with 40 experimental data. The maximum, median, minimum, and mean values in three-parameter datasets are analyzed for discussing the working condition of the system. The experimental results show that the system works stably and reliably with tunable frequency and amplitude output.

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Section: Description Of the Ultrasonic Detection Systemmentioning

confidence: 99%

Design and Performance Analysis of an Ultrasonic System for Health Monitoring of Concrete Structure

Zhao

Zheng

et al. 2021

Sensors

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Development of pulsed‐laser three‐dimensional imaging flash lidar using APD arrays

Hao

Tao

Cao

et al. 2021

Micro & Optical Tech Letters

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Over the past two decades, pulsed‐laser three‐dimensional imaging flash lidar using avalanche photodiode (APD) arrays has attracted extensive research interest due to its great potential for both military and civilian applications. This invited paper gives a brief review of the state‐of‐art pulsed‐laser three‐dimensional imaging flash lidar using APD arrays. The principle of the pulsed‐laser three‐dimensional imaging flash lidar using APD arrays is briefly introduced. According to the working mode of the APD arrays, we divide the current flash lidar into two types: the linear‐mode and the Geiger‐mode. The performances of the pulsed‐laser three‐dimensional imaging flash lidar using APD arrays working at linear‐mode and the Geiger‐mode are summarized. The opportunities and challenges in this field are also discussed. This review is expected to provide a snapshot of the current landscape of flash lidar using APD arrays to attract more interest in this field.

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