A CMOS Ultra-Low Power Vision Sensor With Image Compression and Embedded Event-Driven Energy-Management
A CMOS Ultra-Low Power Vision Sensor With Image Compression and Embedded Event-Driven Energy-Management
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DOI：
10.1109/jetcas.2011.2167072
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发表时间：
2011-09-01
影响因子：
4.6
通讯作者：
Gottardi, Massimo
中科院分区：
文献类型：
--
作者：
Cottini, Nicola;Gasparini, Leonardo;Gottardi, Massimo
本文提出了一种能量感知的CMOS视觉传感器，针对监视和监控应用。该64 x 64像素传感器直接估计和二值化的时空对比度的功耗为30 μ W，在30 fps和3.3 V电源电压。该传感器嵌入了事件检测和能源管理功能，满足了能源自主系统的要求。数据压缩和快速读出传递变成芯片低功耗性能和占空比优化的外部处理器，致力于视觉处理和通信。视觉系统的初步原型已经开发，估计运动和寻找发生在场景中的事件。该系统由视觉传感器、小密度CPLD和微型微控制器组成，微控制器用于数据读取和通信。这里，视觉系统执行约1mW的超低功耗。所提出的系统具有超过四个月的工作寿命，950毫安时电池供电，占空比为5%。
This paper presents an energy-aware CMOS vision sensor, targeted to surveillance and monitoring applications. The 64 x 64 pixels sensor directly estimates and binarizes the spatio-temporal contrast with a power consumption of 30 mu W, at 30 fps and 3.3 V supply voltage. The sensor embeds event detection and energy management capabilities, which meet the requirements of an energy autonomous system. Data compression and fast readout delivering turn into a chip low power performance and duty-cycle optimization of the external processor, devoted to visual processing and communication. A preliminary prototype of vision system has been developed, estimating motion and looking for events occurring in the scene. It consists of the vision sensor interfaced with a small-density CPLD and a tiny micro-controller for data readout and communication. Here, the vision system performs ultra-low power consumption of about 1 mW. The presented system exhibits an operating life of more than four months, powered with 950mA h battery and a duty-cycle of 5%.