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1. 发明授权

US5508546A Active pyroelectric infrared detector 失效
标题翻译：主动热释电红外探测器
公开(公告)号：US5508546A
公开(公告)日：1996-04-16
申请号：US380176
申请日：1995-01-30
申请人： Joseph N. Zalameda , Allan J. Zuckerwar , Joseph M. Mina
发明人： Joseph N. Zalameda , Allan J. Zuckerwar , Joseph M. Mina
IPC分类号： G01J5/34 , G01J5/10
CPC分类号： G01J5/34
摘要： A noncontact pyroelectric infrared detector is described. A pyroelectric film that also has piezoelectric properties is held in place so that it is free to vibrate. It is electrically stimulated to vibrate at a resonance frequency. The vibrating film forms part of a balanced bridge circuit. As thermal radiation impinges on the film the pyroelectric effect causes the resonance frequency to change, thereby unbalancing the bridge circuit. A differential amplifier tracks the change in voltage across the bridge. The resulting voltage signal is further processed by a bandpass filter and a precision rectifier. The device allows for DC or static temperature measurements without the use of a mechanical chopping device.
摘要翻译：描述了非接触式热释电红外探测器。也具有压电特性的热电膜保持就位，使其自由振动。电刺激以共振频率振动。振动膜形成平衡桥式电路的一部分。当热辐射照射在薄膜上时，热电效应会使谐振频率发生变化，从而使桥接电路失谐。差分放大器跟踪桥上电压的变化。所得到的电压信号由带通滤波器和精密整流器进一步处理。该设备允许直流或静态温度测量，而不需要使用机械斩波装置。

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