A novel concept of collision avoidance single-photon light detection and ranging（LIDAR） for vehicles has been demonstrated, in which chaotic pulse position modulation is applied on the transmitted laser pulses for r...A novel concept of collision avoidance single-photon light detection and ranging（LIDAR） for vehicles has been demonstrated, in which chaotic pulse position modulation is applied on the transmitted laser pulses for robust anti-crosstalk purposes. Besides, single-photon detectors（SPD） and time correlated single photon counting techniques are adapted, to sense the ultra-low power used for the consideration of compact structure and eye safety. Parameters including pulse rate, discrimination threshold, and number of accumulated pulses have been thoroughly analyzed based on the detection requirements, resulting in specified receiver operating characteristics curves. Both simulation and indoor experiments were performed to verify the excellent anti-crosstalk capability of the presented collision avoidance LIDAR despite ultra-low transmitting power.展开更多
This paper introduces the function, structure and alarm principles of the breakout prediction system installed for continuous casting in Baosteel＇ s No. 2 Steelmaking Plant. It elaborates on four parameters in the al...This paper introduces the function, structure and alarm principles of the breakout prediction system installed for continuous casting in Baosteel＇ s No. 2 Steelmaking Plant. It elaborates on four parameters in the alarm logic,including the temperature changing rate, temperature difference, temperature fluctuation and temperature match of thermocouples. This paper also explains the causes of different disturbances within the breakout prediction system, and the methods used to prevent and eliminate disturbances from radiation, earth, crosstalk, temperature drift and time drift. Finally, the paper summarizes some potential applications of the above technology.展开更多
随着电子系统和电气设备的高度集成化以及对信号传输需求的增加,电缆线束越来越密集,使其周围的电磁环境越来越复杂,恶劣的电磁环境会导致一系列的电磁兼容性问题.基于多导体传输线理论结合级联传输线方法,通过链路参数矩阵得到非屏蔽...随着电子系统和电气设备的高度集成化以及对信号传输需求的增加,电缆线束越来越密集,使其周围的电磁环境越来越复杂,恶劣的电磁环境会导致一系列的电磁兼容性问题.基于多导体传输线理论结合级联传输线方法,通过链路参数矩阵得到非屏蔽电缆束模型,基于该模型的仿真结果与电磁场仿真软件CST(CST Studio Suite)仿真结果进行对比,验证了本文所建立仿真模型的正确性.重点研究电缆束的线缆数量、线缆端接阻抗以及线缆在电缆束中的层位置对线间串扰的影响,并提出相应的抗干扰措施.特别是对于线缆端接阻抗的研究,提出“牺牲电缆”的概念,即选取一根线缆作为“牺牲电缆”,两端接较小负载,以抑制电缆束的线间串扰.展开更多
基金Project supported by Tsinghua University Initiative Scientific Research Program,China(Grant No.2014z21035)
文摘A novel concept of collision avoidance single-photon light detection and ranging（LIDAR） for vehicles has been demonstrated, in which chaotic pulse position modulation is applied on the transmitted laser pulses for robust anti-crosstalk purposes. Besides, single-photon detectors（SPD） and time correlated single photon counting techniques are adapted, to sense the ultra-low power used for the consideration of compact structure and eye safety. Parameters including pulse rate, discrimination threshold, and number of accumulated pulses have been thoroughly analyzed based on the detection requirements, resulting in specified receiver operating characteristics curves. Both simulation and indoor experiments were performed to verify the excellent anti-crosstalk capability of the presented collision avoidance LIDAR despite ultra-low transmitting power.
文摘This paper introduces the function, structure and alarm principles of the breakout prediction system installed for continuous casting in Baosteel＇ s No. 2 Steelmaking Plant. It elaborates on four parameters in the alarm logic,including the temperature changing rate, temperature difference, temperature fluctuation and temperature match of thermocouples. This paper also explains the causes of different disturbances within the breakout prediction system, and the methods used to prevent and eliminate disturbances from radiation, earth, crosstalk, temperature drift and time drift. Finally, the paper summarizes some potential applications of the above technology.
文摘随着电子系统和电气设备的高度集成化以及对信号传输需求的增加,电缆线束越来越密集,使其周围的电磁环境越来越复杂,恶劣的电磁环境会导致一系列的电磁兼容性问题.基于多导体传输线理论结合级联传输线方法,通过链路参数矩阵得到非屏蔽电缆束模型,基于该模型的仿真结果与电磁场仿真软件CST(CST Studio Suite)仿真结果进行对比,验证了本文所建立仿真模型的正确性.重点研究电缆束的线缆数量、线缆端接阻抗以及线缆在电缆束中的层位置对线间串扰的影响,并提出相应的抗干扰措施.特别是对于线缆端接阻抗的研究,提出“牺牲电缆”的概念,即选取一根线缆作为“牺牲电缆”,两端接较小负载,以抑制电缆束的线间串扰.
