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    • 1. 发明授权
    • High light level cutoff apparatus for use with night vision devices
    • 用于夜视装置的高光水平切断装置
    • US4843229A
    • 1989-06-27
    • US127869
    • 1987-12-02
    • Joseph ReedJoseph N. Caserta
    • Joseph ReedJoseph N. Caserta
    • H01J29/98
    • H01J29/98
    • There is disclosed a high light level cutoff apparatus for use with night vision devices. The apparatus employs a digital method of timing implemented by a divider counter responsive to a crystal controlled input frequency which essentially controls a latch to produce an automatic shutoff of a night vision device during high light ambient conditions which conditions would undesirably reduce the effective life of such a night vision device. The circuitry disclosed utilizes a digital method of clocking and employs the latching relay as indicated which is operated by the digital counter. The circuitry provides a feed back from the latching relay which resets the night vision system so that it will re-operate if a transient accidentally serves to operate the goggles while the light level is in a high state. The circuitry provides a precise timing level via the counter which can be selected to provide extended time out periods from milliseconds to at least several minutes, circumventing many of the disadvantages of prior art devices.
    • 公开了一种用于夜视装置的高亮度水平切断装置。 该装置采用由分频器计数器实现的定时数字方法,其响应于晶体控制的输入频率,其基本上控制闩锁以在高光环境条件期间产生夜视装置的自动关闭,这些条件将不期望地减少这样的有效寿命 夜视仪。 所公开的电路采用数字计时方法,并采用由数字计数器操作的锁定继电器。 电路提供从闭锁继电器的反馈,其复位夜视系统,使得如果瞬时意外地用于在光水平处于高状态时操作护目镜,则其将重新操作。 电路通过计数器提供精确的定时电平,该计数器可被选择以提供从毫秒到至少几分钟的延长的超时周期,以避免现有技术设备的许多缺点。
    • 3. 发明授权
    • Radar system with auxiliary scanning for more dwell time on target
    • 雷达系统具有辅助扫描,可在目标上保持更长的停留时间
    • US4814779A
    • 1989-03-21
    • US30010
    • 1987-03-25
    • Arnold M. Levine
    • Arnold M. Levine
    • H01Q3/14H01Q3/22H01Q3/46
    • H01Q3/46H01Q3/14H01Q3/22
    • A radar system with auxiliary scanning provision for providing more dwell time on target, the system having a main frequency scan antenna with electronic or mechanical arrangements for auxiliary scanning. In the electronic embodiment, a space fed phased-array auxiliary antenna is provided, the radiating elements being interconnected with diode phase shifters, which are electronically actuated and synchronized to the antenna rotation. In the mechanical embodiment, a multi-sided prism arrangement in front of the antenna rotates in synchronism in a counter direction to the antenna, with auxiliary scanning data electronically manipulated for processing.
    • 一种具有辅助扫描设备的雷达系统,用于在目标上提供更多的停留时间,该系统具有用于辅助扫描的具有电子或机械布置的主频率扫描天线。 在电子实施例中,提供了空间馈电的相控阵辅助天线,辐射元件与二极管移相器互连,二极管移相器被电子地激励并与天线旋转同步。 在机械实施例中,天线前面的多边棱镜装置以与天线相反的方向同步旋转,辅助扫描数据被电子地操作用于处理。
    • 7. 发明授权
    • Phase measurement ranging
    • 相位测量范围
    • US4788548A
    • 1988-11-29
    • US95365
    • 1987-09-08
    • Earl L. Hammerquist
    • Earl L. Hammerquist
    • G01S11/02G01S19/11
    • G01S11/02
    • A passive radar ranging system having an antenna system for receiving radiated electromagnetic energy emanating from an emitter source, plus a translation resolution system and a digital computation system for making phase measurements of the received electromagnetic energy with the translated and resolved energy signals being operated upon by a plurality of system spacing parameters, the radiated energy being modulated in a particular pattern, randomly modulated or unmodulated and with the emitter source being fixed or moving while the phase measurements are made from a single measurement platform which may also be fixed or moving with respect to the emitter source, the phase measurements being employed for determining the instantaneous range from the emitter source to the measurement platform.
    • 一种被动雷达测距系统,具有用于接收从发射源发出的辐射电磁能的天线系统,以及一个平移分辨率系统和一个数字计算系统,用于对所接收的电磁能量进行相位测量,其中转换和解析的能量信号由 多个系统间距参数,辐射能量被调制为特定模式,随机调制或未调制,并且发射源源是固定的或移动的,而相位测量是从单个测量平台进行的,单个测量平台也可以相对于固定或移动 到发射源,采用相位测量来确定从发射源到测量平台的瞬时范围。
    • 10. 发明授权
    • VSWR protection circuit apparatus
    • VSWR保护电路设备
    • US4729129A
    • 1988-03-01
    • US919107
    • 1986-10-15
    • Charles B. Koerner
    • Charles B. Koerner
    • H03G3/20H04B1/04
    • H03G3/3042H04B2001/0416
    • A VSWR protection circuit employs first and second mixers whereby the first mixer receives at one input the transmitted frequency and has a local oscillator coupled to the other input to provide at its output a difference frequency. This difference frequency is applied to the input of the second mixer which also receives at another input a frequency which is the sum of an undesired EMI signal plus a residue signal due to reflection from the transmitter. The second mixer produces difference frequencies according to the output from the first mixer. The output from the second mixer is applied to a narrow bandpass filter which essentially allows the transmitted frequency to propagate. The output from the narrow band filter is then detected whereby a DC control voltage is provided and used as a gain control for the transmitting amplifier and essentially is independent of most interfering frequencies.
    • VSWR保护电路采用第一和第二混频器,由此第一混频器在一个输入端接收发射频率,并具有耦合到另一输入的本地振荡器,以在其输出端提供差频。 该差分频率被施加到第二混频器的输入端,该第二混频器还在另一输入端接收由于来自发射机的反射而导致的不期望的EMI信号加残留信号之和的频率。 第二混频器根据第一混频器的输出产生差分频率。 来自第二混频器的输出被施加到基本上允许传输频率传播的窄带通滤波器。 然后检测来自窄带滤波器的输出,由此提供DC控制电压并将其用作发射放大器的增益控制,并且基本上与大多数干扰频率无关。