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Infrared Sensing by Intelligent Functional Fibers

智能功能纤维的红外传感

基本信息

批准号：
02555159
负责人：
YANAGIDA Hiroaki
金额：
$ 4.29万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

项目摘要

Investigation was carried otit iii order to develop fiber materials and devises for IR sensors with intelligent functions, such as a high-speed response and stable sensing of immobile targets. In addition, feasibility for practical tise was examined with the fiber IR sensor.1. Electrical properties were measured for two kinds of carbon fibers with different raw materials and SiC fiber. The semiconducting fiber with a higher resistivity showed a larger thermistor constant, and the output voltage increased with increasing thermistor constant. A PAN (polyacrylonitrile)-based carbon fiber showed a higher thermistor constant than Pitch-based carbon and SiC fibers at a same electrical resistivity.2. IR sensing properties were examined ori sensor elements using monofiber of SiC and PAN-based carbon fibers with different diameters (7 to 130 micrometers). Response time was improved (thermal time constant was decreased) with decreasing fiber ifiameter. The otitpijt voltage increased with increasing radiation energy of IR source and with decreasing surrounding temperature.3. PAN-based carbon fiber, liaviiig a resistivity above 200 ohm. cm and a thermistor constant above 2100 K, detected an IR radiation from htimaii hand wit. 1i a steady output voltage at room temperature. PAN-based carbon fibers distinguished two kinds of lit source, whose body-temperattire was higher or lower than room temperature, by representing a positive or negative otitput. voltage, respectively.4. Stability of sensing property was improved by applying a metal plate with a large heat-capacity and a thermal insulating cover-film to a seristing cleineiit. 1--tifictioiis of recognition of IR-source position and IR-source shape were discussed on a sensor element using a long, contijitious fiber provided with many electrodes.

为了开发具有智能功能的红外传感器的纤维材料和器件，如对静止目标的高速响应和稳定传感，进行了研究。此外，还利用光纤红外传感器验证了其实用化的可行性。测试了两种不同原料的碳纤维和碳化硅纤维的电学性能。具有较高电阻率的半导体光纤具有较大的热敏电阻常数，且输出电压随热敏电阻常数的增大而增大。在相同的电阻率下，PAN基碳纤维表现出比沥青基碳纤维和碳化硅纤维更高的热敏电阻常数。使用不同直径(7~130微米)的碳化硅单纤维和聚丙烯腈基碳纤维，测试了红外传感元件的红外传感特性。光纤参数越小，响应时间越长(热时间常数越小)。随着红外源辐射能量的增加和环境温度的降低，Otipijt电压增大。聚丙烯腈基碳纤维，具有200欧姆以上的电阻率。Cm和一个高于2100K的热敏电阻常数，探测到来自手部的红外辐射。1I在室温下具有稳定的输出电压。PAN基碳纤维通过代表正、负光输出，区分了体温高于或低于室温的两种光源。电压，分别为。将大热容金属板和隔热盖膜应用于丝线晶片，提高了传感性能的稳定性。1-讨论了在传感器元件上识别红外光源位置和形状的方法，该传感器元件使用了多个电极的连续长光纤。