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Passive infrared motion sensing technology

机译：被动红外运动感应技术

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Abstract: In the last 10 years passive IR based (8 to 12 microns) motion sensing has matured to become the dominant method of volumetric space protection and surveillance. These systems currently cost less than $25 to produce and yet use traditionally expensive IR optics, filters, sensors, and electronic circuitry. This IR application is quite interesting in that the volumes of systems produced and the costs and performance level required prove that this is potential for large scale commercial applications of IR technology. This paper will develop the basis and principles of operation of a staring motion sensor system using a technical approach. A model for the motion of the target is developed and compared to the background. The IR power difference between the target and the background as well as the optical requirements are determined from basic principles and used to determine the performance of the system. Low cost reflective and refractive IR optics and bandpass IR filters are discussed. The pyroelectric IR detector commonly used is fully discussed and characterized. Various schemes for `false alarms' have been developed and are also explained. This technology is also used in passive IR based motion sensors for other applications such as lighting control. These applications are also discussed. In addition the paper will discuss new developments in IR surveillance technology such as the use of linear motion sensing arrays. This presentation can be considered a `primer' on the art of passive IR motion sensing as applied to surveillance technology. !8
机译：摘要：在过去的10年中，基于被动红外（8至12微米）的运动感应已经成熟，成为空间空间保护和监视的主要方法。这些系统目前的生产成本不到25美元，但仍使用传统上昂贵的IR光学器件，滤波器，传感器和电子电路。这种IR应用程序非常有趣，因为所生产的系统数量以及所需的成本和性能水平证明，这对于IR技术的大规模商业应用而言具有潜力。本文将使用技术方法来发展凝视运动传感器系统的基础和工作原理。开发了目标运动的模型并将其与背景进行比较。根据基本原理确定目标和背景之间的IR功率差以及光学要求，并将其用于确定系统的性能。讨论了低成本反射和折射红外光学器件以及带通红外滤光片。对常用的热释电红外探测器进行了全面讨论和表征。已经开发了各种“错误警报”方案，并对其进行了说明。这项技术还用于基于被动红外的运动传感器中，用于其他应用，例如照明控制。还讨论了这些应用程序。此外，本文还将讨论红外监视技术的新发展，例如线性运动传感阵列的使用。可以将本演示文稿视为应用于监视技术的被动IR运动感测技术的“入门”。 ！8

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