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1. 发明授权

US3704461A Intrusion detection system responsive to interruption of a transmitted beam 失效
标题翻译：针对发射光束中断的入侵检测系统
公开(公告)号：US3704461A
公开(公告)日：1972-11-28
申请号：US3704461D
申请日：1970-03-25
申请人： OPTRONIX INC
发明人： ROSE EDWARD A , KROHN RICHARD H , SLATER DONALD E
IPC分类号： G08B13/183 , G08B13/18
CPC分类号： G08B13/183
摘要： An infrared intruder detection system operable under severe weather conditions including fog, rain and snow over great distances exceeding 500 feet in the severest weather comprises a pulsed infrared transmitter and a self-contained spaced apart self-synchronized infrared receiver. Upon interruption of the transmitted beam for a predetermined period, the receiver generates an alarm in response to the remaining ever present signals due to ambient light and thermal instrument noise. When the beam is not interrupted, a local synchronous oscillator will track the incoming signal pulses. In the presence of an intruder, the pulsed beam is no longer received and the oscillator is unable to track the resulting amplified noise signal which arises from ambient light and thermal instrument noise. This results in the generation of an error signal at the output of the demodulator to which the oscillator is coupled. By the inclusion of appropriate bandpass amplifiers, filters and integrating circuits set to respond to predetermined thresholds coupled to the output of the demodulator, the receiver is able to discriminate between an intruder and such momentary interrupts as are caused by birds, falling leaves and blowing bits of paper which otherwise might cause false alarms.
摘要翻译：在恶劣天气条件下可操作的红外入侵者检测系统，包括在最恶劣天气下超过500英尺的雾，雨和雪超过500英尺的红外入侵者检测系统包括脉冲红外发射器和独立的间隔开的自同步红外接收器。在发射光束中断预定时间段之后，由于环境光和热仪器噪声，接收器响应于剩余的现有信号产生报警。当光束不中断时，本地同步振荡器将跟踪输入信号脉冲。在入侵者存在的情况下，不再接收脉冲波束，并且振荡器不能跟踪由环境光和热量仪器噪声引起的所产生的放大噪声信号。这导致在振荡器耦合到的解调器的输出处产生误差信号。通过包括适当的带通放大器，滤波器和集成电路设置为响应于耦合到解调器的输出的预定阈值，接收器能够区分入侵者和诸如由鸟，落叶和吹风位造成的瞬时中断否则可能会导致虚警。

2. 发明授权

US3657543A Optical communications system with improved bias control for photosensitive input device 失效
标题翻译：光学通信系统改进的智能输入设备的偏置控制
公开(公告)号：US3657543A
公开(公告)日：1972-04-18
申请号：US3657543D
申请日：1968-07-24
申请人： OPTRONIX INC
发明人： ROSE EDWARD A
IPC分类号： H04B10/152 , H04B9/00
CPC分类号： H04B10/676
摘要： An optical communications system in which a subcarrier is impressed on an optical beam with a modulation representative of a signal to be communicated. This beam is intercepted by a semiconductor device having a photo-sensitive junction which generates an electrical signal representative of the modulated subcarrier and applies this signal to a demodulator for detecting the transmitted signal. A tuned circuit resonant at the subcarrier frequency is interposed between the semiconductor device and the detector and serves as a rejection filter for frequencies which deviate from the subcarrier frequency by more than the bandwidth of the transmitted signal. A back bias is applied to the photo-sensitive junction of the semiconductor device through a low resistance path of the tuned circuit so that the back bias does not vary substantially with variations in the intensity of optical radiation intercepted by the semiconductor device.
摘要翻译：一种光通信系统，其中副载波被施加在具有代表要传送的信号的调制的光束上。该光束被具有光敏结的半导体器件拦截，该光敏结产生表示经调制的子载波的电信号，并将该信号施加到用于检测发送信号的解调器。在子载波频率下谐振的调谐电路插入在半导体器件和检测器之间，并且用作与副载波频率偏离超过发送信号的带宽的频率的抑制滤波器。通过调谐电路的低电阻路径将偏压施加到半导体器件的光敏结，使得背偏压基本上随半导体器件截取的光辐射强度的变化而变化。

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