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本专利是一种供红外探测仪使用的热释电电容传感器,该传感器(S)采用两个传感元件(3,3’),它们固定在一块薄型的氧化铝或Al_2O_3衬底上,两者之间是互相绝缘的。这两个传感元件均用钽酸锂氧化物即LiTaO_3热释电晶片制成,它们沿两条直线排列,并按一锐角互相倾斜,因此覆盖的表面具有较短的或较长的边缘。一个场效应晶体管(5)形成处理电路(9)放大器通道的输入,当在该传感器范围内探测到红外源时,处理电路便触发报警器(10)。这种热释电电容传感器的优点是,只要被监视的区域稍微宽一些如狭长的走廊,便可以实
This patent is a pyroelectric capacitive sensor for infrared detector. The sensor (S) uses two sensing elements (3,3 ’) which are fixed on a thin alumina or Al 2 O 3 substrate. Two Between each other is insulated. Both of these sensing elements are made of a lithium tantalate oxide, LiTaO 3 pyroelectric chip, arranged in two straight lines and inclined at an acute angle to each other so that the covered surface has shorter or longer edges. A field effect transistor (5) forms the input of the amplifier channel of the processing circuit (9) which triggers the alarm (10) when an infrared source is detected in the sensor range. The advantage of this pyroelectric capacitive sensor is that as long as the monitored area is slightly wider, such as a narrow corridor,