Design of driving system for AUV low-light level camera

Hou-de WU; Yu-chen HOU; Wen-hai XU; Ming ZHAO

doi:10.3788/OPE.20182610.2605

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Design of driving system for AUV low-light level camera

Information Sciences | 更新时间：2020-07-05

- Design of driving system for AUV low-light level camera
- Optics and Precision Engineering Vol. 26, Issue 10, Pages: 2605-2613(2018)
- 作者机构：
  
  大连海事大学信息科学技术学院, 辽宁大连 116026
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20182610.2605
  CLC： TN386.5;TN223
- Received：01 March 2018，
  
  Accepted：11 April 2018，
  
  Published：25 October 2018
- 稿件说明：
移动端阅览
Hou-de WU, Yu-chen HOU, Wen-hai XU, et al. Design of driving system for AUV low-light level camera[J]. Optics and precision engineering, 2018, 26(10): 2605-2613.
DOI：

Hou-de WU, Yu-chen HOU, Wen-hai XU, et al. Design of driving system for AUV low-light level camera[J]. Optics and precision engineering, 2018, 26(10): 2605-2613. DOI： 10.3788/OPE.20182610.2605.

摘要

提出了基于水下自主航行器的EMCCD微光照相机驱动系统设计方法。首先，分析了EMCCD输出噪声的组成，根据暗电流噪声和时钟感生噪声的关系，给出了常规功率驱动的器件选型原则和设计方法；讨论了使用图腾柱电路实现电子倍增驱动的功耗问题，并给出了改进方案；使用高频系统时钟实现了驱动相位和脉宽的微调，解决了驱动时序波形幅度重叠率不足的问题；最后，给出了使用CCD201-20搭建的水下相机结构和实验结果。实验结果表明，系统产生的常规驱动信号频率为时钟频率10 MHz，串行转移时钟的幅度重叠率优于50%，并行转移时钟的幅度重叠率优于90%，驱动信号的相位调整精度为18°，脉宽调整精度为5 ns，驱动波形稳定、平整，电子倍增驱动信号高电平可调，功耗相较于优化前降低7.2%。本文所介绍的EMCCD驱动系统设计方法充分兼顾了驱动系统的噪声、体积和功耗问题，可以广泛应用在水下微光成像乃至常规CCD领域。

Abstract

A design method for a low-light level camera driving system based on an autonomous underwater vehicle was proposed. First

the noises of an electron multiplying charge-coupled device camera was analyzed

and the principle and method of designing conventional driving circuits was proposed taking into consideration the relationship between dark current noise and clock-induced charge noise. Next

the issue of power consumption in totem-pole circuits applied to electron multiplying drivers was discussed

and a power optimization plan was presented. A high-precision system clock was used for fine adjustments of the driving signal phase and pulse width and solving the problem of amplitude overlap rate insufficiency. Finally

the low-light level camera structure and experimental results were presented. The experiments indicate that the system-generated conventional driving signal frequency is 10 MHz. The serial transfer clock amplitude overlap rate and parallel transfer clock amplitude overlap rate are better than 50% and 90%

respectively. The phase adjustment accuracy of the driving signal and pulse width adjustment accuracy are 18° and 5 ns

respectively. The driving signal is stable and smooth

the electron multiplying driving signal is highly adjustable

and the power consumption is lowered by 7.2%. The parameters of noise

size

and power consumption were considered in this design. Thus

it can be widely used in underwater low-light level imaging as well as conventional charge-coupled devices.

关键词

Keywords

references

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