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    • 1. 发明授权
    • High output differential pyroelectric sensor
    • 高输出差示热释电传感器
    • US4441023A
    • 1984-04-03
    • US288192
    • 1981-07-29
    • Alan P. DoctorFriedrich H. Oettel
    • Alan P. DoctorFriedrich H. Oettel
    • G01J5/34G08B13/191H01L37/02G01J5/10
    • H01L37/02G01J5/34G08B13/191
    • A dual pyroelectric crystal sensor suitable for infrared intruder alarms and the like having two separate closely spaced identical pyroelectric crystal detectors connected in parallel opposition. The sensor includes a single ended field effect transistor amplifier with the entire sensor encapsulated in a TO-5 can. The two crystals each have one end cemented to a ceramic substrate in a cantilevered fashion, permitting shock or vibration to affect each crystal equally. Therefore, voltages due to the piezoelectric responses of the crystals are equal and cancel. If both crystals are irradiated by a common heat source, the pyroelectric generated voltages will cancel. If either crystal is irradiated separately, an output voltage will be produced.
    • 适用于红外入侵者报警器的双重热电晶体传感器等具有两个分开的紧密间隔的相同的热电晶体检测器,它们并联在一起。 该传感器包括单端场效应晶体管放大器,整个传感器封装在TO-5罐中。 这两个晶体各有一端以悬臂方式与陶瓷基体胶合,允许冲击或振动均匀地影响每个晶体。 因此,由于晶体的压电响应引起的电压相等并被抵消。 如果两个晶体被共同的热源照射,则热释电产生的电压将被消除。 如果任一晶体被单独照射,将产生输出电压。
    • 10. 发明授权
    • Differential pyroelectric detector
    • 差示热电探测器
    • US4384207A
    • 1983-05-17
    • US228801
    • 1981-01-23
    • Alan P. Doctor
    • Alan P. Doctor
    • G01J5/34G08B13/191G01J1/00
    • G08B13/191G01J5/34
    • A pyroelectric detector comprising a body of pyroelectric material having a front surface for receiving radiation, a rear surface, a relatively thin coating of radiation absorbing and transmitting and electrically conducting material applied to the entire front surface, and a pair of relatively thicker areas of radiation reflecting and electrically conducting material applied to the rear surface in spaced-apart relation. Two heat sensitive charge generators are defined in the two regions of the pyroelectric body between the coating on the front surface and the two areas on the rear surface, and output electrical leads are attached to the two areas on the rear surface. When radiation is absorbed by either of the heat sensitive charge generators, an electrical current flows in a circuit connected to the output leads thereby providing an indication of the radiation.
    • 一种热电检测器,其包括热电材料体,其具有用于接收辐射的前表面,后表面,施加到整个前表面的相对薄的辐射吸收和透射涂层以及导电材料,以及一对相对较厚的辐射区域 反射和导电材料以间隔的关系施加到后表面。 在前表面的涂层和后表面的两个区域之间的热电体的两个区域中限定两个热敏电荷发生器,并且输出电引线附接到后表面上的两个区域。 当辐射被任何一种热敏电荷发生器吸收时,电流在连接到输出引线的电路中流动,从而提供辐射的指示。