-
公开(公告)号：US20160245909A1
公开(公告)日：2016-08-25
申请号：US15001399
申请日：2016-01-20
IPC分类号： G01S13/34 , G01F23/284
CPC分类号： G01S13/34 , G01F23/284 , G01S7/4056 , G01S2007/4073
摘要： A frequency-modulated continuous-wave (FMCW) radar system for level or distance measurement in which a frequency modulated signal to be transmitted to a target is mixed with an echo signal from the target to produce a beat signal that passes through an analog filter before being digitized and processed in a digital processor to determine the level or distance to be measured, where a test signal is generated by a signal generator, and a switch is controlled to connect the beat signal or the test signal to the analog filter, the signal generator generates the test signal as a broadband signal having a periodic waveform, e.g., a square wave, and the digital processor calculates a spectrum of the digitized filtered test signal by Fast Fourier Transform and generates a fault signal if the spectrum differs from a reference spectrum by a predetermined amount to allow for failure detection.
摘要翻译： 用于电平或距离测量的频率调制连续波（FMCW）雷达系统，其中要发送到目标的调频信号与来自目标的回波信号混合，以产生通过模拟滤波器的差拍信号 在数字处理器中被数字化和处理以确定要测量的电平或距离，其中信号发生器产生测试信号，并且控制开关以将拍频信号或测试信号连接到模拟滤波器，信号 发生器产生测试信号作为具有周期波形（例如方波）的宽带信号，并且数字处理器通过快速傅里叶变换计算数字化滤波的测试信号的频谱，并且如果频谱与参考频谱不同，则产生故障信号 以预定量进行故障检测。
-
公开(公告)号：US20130099989A1
公开(公告)日：2013-04-25
申请号：US13655829
申请日：2012-10-19
IPC分类号： H01Q13/02
CPC分类号： H01Q1/225 , G01F23/284 , H01Q13/0208 , H01Q19/08
摘要： A horn antenna for a radar device including a dielectric filling body arranged in a hollow horn section of a metal body and a dielectric cover attached to the filling body and sealingly closing the open end of the metal body. The filling body includes a first conical portion that is fittingly received in the hollow horn section, and a second conical portion that is situated away from the open end and dimensioned to leave a gap between itself and the wall of the hollow horn section. The dielectric filling body has a third portion between the first and second portions, where the third portion and the opposite portion of the wall of the hollow horn section are provided with circumferential grooves arranged in pairs opposite each other to provide a wear and maintenance-free attachment of the dielectric filling body in the horn antenna.
摘要翻译： 一种用于雷达装置的喇叭天线，包括布置在金属体的中空喇叭部分中的电介质填充体和附接到填充体的电介质盖，并且密封地封闭金属体的开口端。 填充体包括适合地容纳在中空喇叭部分中的第一锥形部分和远离开口端定位的第二圆锥形部分，并且其尺寸设计成在其与中空喇叭部分的壁之间留下间隙。 电介质填充体在第一和第二部分之间具有第三部分，其中中空喇叭部分的壁的第三部分和相对部分设置有彼此相对布置的圆周槽，以提供无磨损和免维护 电介质填充体在喇叭天线中的连接。
-
搜索结果
2 条记录 (耗时 0.011 秒)
