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首页> 外文期刊>Mechatronics, IEEE/ASME Transactions on >Hyperacute Edge and Bar Detection in a Bioinspired Optical Position Sensing Device
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Hyperacute Edge and Bar Detection in a Bioinspired Optical Position Sensing Device

机译：受生物启发的光学位置传感设备中的超急性边缘和条形检测

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摘要

We present an improved bioinspired optical position sensing device, in which insect-based retinal microscanning movements are used to detect and locate contrasting objects such as edges or bars. The active microvibrations imposed upon the retina endow the sensor with hyperacuity. For the sake of clarity, this is demonstrated here for a two-pixel sensor, but the same principle could be applied to all pairs of neighboring photosensors in a focal plane array. The sensor is able to detect an edge or a bar present within its small field of view ($hbox{4}^circ$) and locate it with a resolution ( $hbox{0.025}^circ$) 160-fold finer than the static resolution imposed by the pixel spacing. The sensor features the novel ability to establish whether it is actually facing an edge or a bar, based on the phase difference between the sinusoidally modulated signals of its two photoreceptors. The visual processing algorithm involves simple linear filtering and purely arithmetic operations requiring few computational resources. The complete theoretical framework is presented here, including an analytical model for the microscanning sensor. This high-performance, low-cost angular position sensing device could have many applications in fields such as metrology, astronomy, robotics, automotive design, and aerospace.
机译：我们提出了一种改进的生物启发式光学位置传感设备，其中基于昆虫的视网膜显微扫描运动用于检测和定位对比对象，例如边缘或条形。施加在视网膜上的主动微振动使传感器具有超敏锐度。为了清楚起见，在此针对两个像素的传感器进行了演示，但是相同的原理可以应用于焦平面阵列中的所有成对的相邻光电传感器。传感器能够检测到其小视场（$ hbox {4} ^ circ $）中存在的边缘或条形，并以比分辨率（$ hbox {0.025} ^ circ $）高160倍的分辨率进行定位。像素间距施加的静态分辨率。该传感器具有新颖的功能，可基于其两个感光器的正弦调制信号之间的相位差来确定它实际上是面向边缘还是面向条形。视觉处理算法涉及简单的线性滤波和仅需很少计算资源的纯算术运算。这里介绍了完整的理论框架，包括用于微扫描传感器的分析模型。这种高性能，低成本的角位置检测设备可以在计量，天文学，机器人技术，汽车设计和航空航天等领域中具有许多应用。

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