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最近迫切希望获得温度变化速迅、适应于防盗防灾以及与微型电子计算机组合使用的自动响应红外传感器.PVF_2是一种耐气候性、加工性质优良、容易制成满足红外探测器要求的均匀薄膜的高分子热电材料.这次研制的红外探测器是用二个PVF_2薄膜元件的重叠结构.其目的是用第1个元件检测红外线,而用第2个元件产生相位相反的相同电平,以补偿温度漂移和振动冲击等产生的噪声.由于温度变化和冲击等产生的电荷不需要用泄漏电阻接地,从而改善了信噪比,并具有结构简单、价格便宜的优点.采用这种结构消除了以前存在的由于温度急剧变化引起噪声电平的增加,并且在环境温度-20—+65℃范围内获得了稳定的线性输出.这种探测器作为公共汽车上下乘客计数系统的计算机中心处理装置的终端用传感器,已提供数百台使用,即使装在车上而有一半露在外面的严酷条件下,也能获得理想的结果.
Recently, there is an urgent need to obtain a rapid temperature change and to adapt to anti-theft and disaster prevention as well as automatic response infrared sensors used in combination with microcomputers.PVF_2 is a weather-resistant, processing-quality and easy-to-produce uniform film that meets the requirements of infrared detectors Of the polymer thermoelectric materials.This developed infrared detector is the use of two PVF_2 thin film elements overlapping structure.The purpose is to use the first element to detect infrared rays, and use the second element to produce the same phase with the opposite phase to Compensate for the noise caused by temperature drift and vibration impact, etc. The charge due to temperature change and impact does not need to be grounded by the leakage resistance, thus improving the signal-to-noise ratio, and has the advantages of simple structure and low price, adopting the structure to eliminate Previously there was an increase in noise level due to drastic temperature changes and a stable linear output was obtained at ambient temperature in the range of -20- + 65 ° C. This detector served as a computer central processing unit of the passenger car upper and lower passenger counting system End-use sensors, has been provided hundreds of use, even if installed in the car and one half out of the harsh conditions Under, you can get the desired result.