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    • 24. 发明授权
    • Non-dispersive infrared gas analyzer
    • 非分散型红外线气体分析仪
    • US4346296A
    • 1982-08-24
    • US178302
    • 1980-08-15
    • Robert E. PassaroKevin Williams
    • Robert E. PassaroKevin Williams
    • G01N21/61G01N21/03G01N21/27G01N21/35G01N21/26
    • G01N21/3504G01N21/03
    • A non-dispersive infrared gas analyzer is described. Infrared energy is directed through a sample cell, and is interrupted at a predetermined frequency. The infrared energy at at least one preselected wavelength is detected to produce an AC signal having an amplitude proportional to the infrared energy passing through said sample cell and having a frequency corresponding to the predetermined frequency. The preselected wavelength corresponds to the characteristic absorption wavelength of a preselected gas. This AC signal is processed to produce a DC signal having an amplitude proportional to the concentration of the preselected gas in the mixture being analyzed. The signal processor includes an output amplifier, a voltage biasing network including a summing junction connected to the input of the amplifier, and a first variable control manually adjustable to bring the current at the summing junction to zero in the presence of a non-absorbing gas in the sample cell. A second variable control is connected in a feedback loop from the output of the amplifier to the input thereof for span calibration.
    • 描述了非分散红外线气体分析仪。 红外能量被引导通过样品池,并以预定的频率中断。 检测至少一个预选波长的红外能量以产生具有与通过所述采样单元并且具有对应于预定频率的频率成比例的红外能量的振幅的AC信号。 预选波长对应于预选气体的特征吸收波长。 该AC信号被处理以产生具有与所分析的混合物中预选气体浓度成比例的振幅的DC信号。 信号处理器包括输出放大器,电压偏置网络,其包括连接到放大器的输入端的求和点,以及可手动调节的第一可变控制器,以使得在非吸收气体存在的情况下使求和结点处的电流为零 在样品池中。 第二可变控制器从放大器的输出到其输入的反馈回路中连接用于量程校准。
    • 30. 发明授权
    • Scanning system for lidar
    • 激光雷达扫描系统
    • US08072663B2
    • 2011-12-06
    • US12447937
    • 2007-10-30
    • James O'NeillWilliam T. MooreKevin WilliamsRobert Bruce
    • James O'NeillWilliam T. MooreKevin WilliamsRobert Bruce
    • G02B26/08
    • G02B26/105G01S7/4817
    • The present invention relates to a scanning system optimized for lidar that includes a nodding mirror, a rotary electromagnetic drive, a rotary optical encoder, and control circuitry. The rotary electromagnetic drive includes a yoke incorporating a permanent magnet, and an arm having a coil at one end of the arm. The coil is enclosed within the yoke, and an opposite end of the arm is coupled to the nodding mirror, such that movement of the coil within the yoke in response to a current causes the nodding mirror to rotate. The rotary optical encoder produces an output signal in response to rotation of the nodding mirror, which serves as feedback to the control circuitry. The control circuitry adjusts the current provided to the rotary electromagnetic drive in response to the output signal, such that the nodding mirror rotates in a reference scan pattern.
    • 本发明涉及一种针对激光雷达优化的扫描系统,其包括点头镜,旋转电磁驱动器,旋转光学编码器和控制电路。 旋转电磁驱动器包括一个包含永磁体的磁轭和一个在臂的一端具有线圈的臂。 线圈被包围在轭内,并且臂的相对端联接到点头镜,使得响应于电流使线圈在轭内的运动导致点头镜旋转。 旋转光学编码器响应于点控反射镜的旋转而产生输出信号,其作为对控制电路的反馈。 控制电路响应于输出信号调节提供给旋转电磁驱动器的电流,使得点头镜以参考扫描图案旋转。