基于热释电探测器的人体红外感应单元设计

针对现有的人体定位系统中红外感应单元探测距离小、信号处理复杂等问题,提出了一种基于热释电探测器的红外感应单元。通过锗窗口光学透镜对热释电探测器进行调制,减小感应视场角度,提高感应方向性和抗干扰能力,设计信号调理电路对输出信号进行放大滤波。采用锥形外形结构增强聚焦能力,拉长探测距离,便于实现大范围定位。实验结果表明红外感应单元的最远探测距离达到45 m,并绘制了红外感应单元的感应视场图。     

热释电型红外传感器原理及应用

热释电型红外传感器原理及应用沈阳大学计算机工程系（１１００４４）范立南钛酸钡等热电材料，若其表面的温度上升或下降，则该表面产生电荷，这种效应称热释电效应。热释电型传感器利用热释电效应来检测受光面的温度升高值，且工作在红外波段内。这种传感器在遥感技术、...     

吸收光谱型气体红外传感器的设计与实现

对一种吸收光谱型气体红外传感器的工作原理、设计原理和集成化设计进行了分析.其中气体浓度对光谱的吸收会影响光强的变化,所以将微型热释电红外敏感头、小型灯泡都集成在1个小型的气室中,气室中有2个通道,气体探测通道和参考通道.2个通道光强的强弱差就会体现出气体浓度的大小,这样就实现了测试气体浓度的功能.集成化采用MEMS工艺将红外双路敏感元件及滤光片制作成探测头,然后通过微封装和微小集成技术将探测头、红外光源、过滤网集成在气室内.     

热释电红外传感器在生物特征识别领域中的研究进展

步态识别作为生物特征识别技术的一个新兴子领域,旨在根据人的行走姿势实现对个体身份的识别。人行走过程中身体各部分的红外热辐射信号具有某种个体特征,该特征信息能够被热释电红外传感嚣有效检测。通过分析传感器的输出信号,就可以提取出人体运动的特征性数据,实现对不同人、不同运动状态的识别。本文对热释电红外传感器应用于生物特征识别领域的研究进展进行论述,从传感器的探测原理、在步态识别中的应用以及热释电信息的特征提取与分类算法进行总结,并对当前该研究方向上亟待解决的问题作简要的分析。     

热释电红外报警系统设计

基于热释电红外传感器的工作原理,设计了一种被动式热释电红外报警器。主要用于家居安全,探测有无外人闯入。该系统由热释电红外传感器、菲涅尔透镜和监控电路组成。系统把红外线的隐蔽性很好地应用于电路中,选用了新一代红外信号处理器BISS0001,设计了放大滤波电路,红外信号处理电路,并加入语音芯片,模拟警笛声音,达到防盗目的。经多次实验,该系统反应灵敏,抗干扰能力强,安全可靠。     

一种新型家用防盗报警系统

介绍一种热释电红外报警系统 ,也是一种新型家用防盗系统 .如果有人非法进入家中 ,该报警系统通过电话自动传呼两次预先设定主人的 BP机号码 ,通知主人此时家中已有外人来 .当家人回来时 ,可先将该报警系统关闭 .该系统主要由热释红外检测电路、脉冲宽度检测电路、摘机脉冲产生电路、完成摘机和挂机动作电路、拨号音检测电路、拨号脉冲产生及完成拨号电路、拨号限时电路、挂机脉冲产生电路、拨号次数检测电路组成 .采用热释电红外传感器构成的被动式人体红外探测器 ,具有监测范围宽、探测距离远、可靠性高等优点 ,在安全防范及自动控制领域…     

高压输电线路红外防鸟报警系统研制

本文介绍用于高压输电线路上防止鸟害的电子防鸟报警系统，本设计以热释电红外传感器作为检测部件，检测外界信息，并转换输出微弱的电信号，经运算放大器、A/D采样、单片机处理，滤去干扰，最后所得信号触发报警电路。     

采用单片机控制的红外自动门

文章介绍一种以MC68HC11K4单片机为控制核心的红外自动门的硬件组成及软件实现方法。采用热释电红外传感器作为探头检测人体的出现,从而实现整个红外自动门控制流程智能化。硬件电路简单,软件功能完善,整个系统性能可靠、灵敏度高。     

电调制非分光红外(NDIR)气体传感器

介绍一种采用电调制红外光源的新型非分光红外气体传感器。该传感器通过采用电调制红外光源，节省了传统方法中的机械调制部件；同时采用高精度干涉滤光片一体化热释电红外传感器及单光束双波长技术，配合易拆卸的镀金气室及ADuC812数据采集系统，可以实现SO2、NO、CO2、CO、CH4等气体的实时测量。     

基于红外传感器的人体信号检测保护系统设计

针对人们特别是儿童近距离观看电视时的视力保护,设计了一种利用热释电红外传感器检测距离变化,用于检测有无人体信号靠近,进行电视近距离保护、语音提示报警功能的系统,具有较强的可靠性、实用性.     

基于51系列单片机及热释电人体红外线传感器的自动空气净化装置

基于单片机AT89C51的控制．信号检测装置采用的是热释电人体红外线传感器和气体浓度传感器。给出完整的硬件电路图和软件实现方案,其使用性能优越且设计方案简单易懂。     

利用热释电红外信号进行人体动作形态识别

利用配置有菲涅尔透镜的热释电红外探测器接收人体发出的红外辐射,通过采集、分析探测器输出模拟信号的时、频域特征,提取人体动作形态的信息.对人体原地踏步、跳跃等动作形态进行了实验.实验结果表明,探测信号中所包含的人体动作信息与探测距离的关系不大.通过分析信号的时、频域特征,可很好地提取出人体踏步、原地跳跃等运动特征.在此基础上,设计了一种快速寻峰检测算法,实现了一套可以实时监测人体踏步、原地跳跃等动作形态的实验系统.     

Design and analysis of an infrared range sensor system for floor-state estimation

Most blind and vision-impaired people use a white cane or a guide dog to aid their walking. The conventional white cane helps the user to perceive the environment simply by identifying the presence of nearby obstacles. In the present study, three infrared range sensors were used to identify the floor state. The sensor system, affixed to the user’s belt, does not require swinging motion or any other movement by the user. The three sensors are configured radially, and the design parameters are selected based on the sensor characteristics. The main difference from the conventional range sensor system for the blind is that the infrared range sensor system identifies three discrete states (even surface, ascending stair, descending stair). The condition for the state transition was derived from a sensor system model. Additionally, the effects of sensor system movement were verified by covariance analysis.     

基于人体步态识别的热释电红外传感报警系统

针对热释电红外传感器对运动后静止的人体无法感应的缺点,设计了一种基于人体步态识别的热释电红外报警系统,大大提高了系统感知智能度,减少了报警的误报率.该系统利用热释电红外传感器(PIR)作为探头,将感测到人体的红外信息转换成电压信号,通过滤波、放大等信号调理以及经过数据采集后,将信号传递给单片机处理,结合人体运动特征进行...     

Miniature low-power IR monitor for methane detection

A portable methane gas monitor based on an infrared spectrum absorption principle has been developed using a dual-channel and dual-wavelength pyroelectric infrared detector, active filters around the overtone absorption lines of methane at 3.31 μm, reference filters around the non-absorption lines of methane at 3.93 μm, mid-IR LEDs, a miniature gold-filled cell structure, temperature sensors for gas concentration calibration and compensation, an electrical modulation source, and a highly integrated intelligent controller. A detailed investigation has been carried out to design a low-cost portable IR optical sensor for methane detection that can operate in harsh environments with temperature variations between −10 °C and 40 °C. The infrared detection optics principle used in developing this system is mainly analyzed. A prototype based on this design showed an accuracy of ±0.05%, which meets the technology requirements of lower-power consumption, reduced volume, and wide measurement range.     

多通道红外监测无线循环报警系统的设计

该系统由多个红外监测电路和一个基于单片机的循环扫描报警电路构成。当有移动物体进入某一通道的监测范围时,红外探测器发出信号。单片机对所有通道进行循环扫描,发现信号后发出声光报警,并显示报警的通道号。该系统采用无线收发模块传输信号,因此具有体积小、结构简单、安装简便等特点,在安全防护领域中具有一定的应用价值。     

An autonomous low-Cost infrared system for the on-line monitoring of manufacturing processes using novelty detection

This paper describes the implementation of a process monitoring system using a low-cost autonomous infrared imager combined with a novelty detection algorithm. The infrared imager is used to monitor the health of several manufacturing processes namely: drilling, grinding, welding and soldering. The main aim is to evaluate the use of low-cost infrared sensor technology combined with novelty detection to distinguish between normal and faulty conditions of manufacturing processes. The ultimate aim is to improve the reliability of the manufacturing operations so as to ensure high part quality and reduce inspection costs. The paper describes several case studies, which have shown that the new low-cost technology could provide an inexpensive and autonomous methodology for monitoring manufacturing processes. Novelty detection is used to compare normal and faulty conditions in order to provide an automated system for fault detection.     

Development of a laser sensor for in-process guidance of an industrial robot

A pilot-type laser sensor for non-contacting distance measurement has been developed, which was aimed at application to in-process guidance of an industrial robot. A laser beam is emitted through a convex lens to an object and the reflected light is collected and focused by the lens. Diameter of its unfocused image is measured using one dimensional CCD-array, from which the distance is determined. Because the way of the beam emission and that of reflected light to the lens are the same, scanning of the beam to follow a path for robot guidance is easy and some geometric constraints, which may arise for a sensor using triangular principle, are removed. Geometric analyses for scanning the beam with a mirror are presented to determine the distance and position of an object point. A simple tracking control theory for the beam to follow a path and give informations about its position to a robot controller has been suggested and analyzed.     

Photopyroelectric response of PTCa∕PEEK composite

A pyroelectric composite made of calcium modified lead titanate ceramic and polyether-ether-ketone high performance polymer was obtained in the film form by hot pressing the ceramic/polymer mixture into the desired composition. After polarization with a suitable electric field, a ceramic composite film (60% vol.) exhibited a pyroelectric figure of merit three times higher than that of a lead zirconate titanate ceramic. The material was used as infrared radiation sensor. The voltage responsivity decreases with the inverse of the frequency showing the same behavior of the thermally thick sensor. The reproducibility of the sensor responses was observed.