-
公开(公告)号：EP0742908A4
公开(公告)日：1999-05-06
申请号：EP95943564
申请日：1995-08-09
CPC分类号： G01S7/023 , G01S7/2813 , G01S7/2923 , G01S7/36 , G01S2007/2883
摘要： Improvement of radar signal-to-noise ratio and detection sensitivity in radar systems is achieved by methods employing the subtraction (27) of the unwanted radio frequency interference, RFI, or 'clone' signals thereof, from the total received signal. The Clone signals are appropriately adjusted in phase (14) and amplitude (16), and are obtained from an auxiliary broad beam antenna or from a delayed sample from the system's principal antenna. When multiple RFI signals at different frequencies are present, the entire receive band is subdivided into a plurality of frequency sub-ranges.
-
公开(公告)号：EP0758093A3
公开(公告)日：1999-04-07
申请号：EP96111287.7
申请日：1996-07-12
发明人： Höss, Alfred, Dr.
CPC分类号： G01S7/023 , G01S7/35 , G01S13/345 , G01S13/584 , G01S13/931 , G01S2013/9321 , G01S2013/9353 , G01S2013/9375
摘要： Der Leistung, die ein Radargerät im Mittel abstrahlt, wird in Abhängigkeit von der Geschwindigkeit eines Fahrzeuges, in das das Radargerät eingebaut ist, gesteuert. Dabei wird der Zeitbereich, während dessen ein Radargerätes Radarsignale sendet, proportional der Geschwindigkeit eingestellt. Der Abstrahlungswinkel, in den Radarsignale abestrahlt werden, wird ebenfalls in Abhängigkeit von der Geschwindigkeit gesteuert.
-
公开(公告)号：EP0848829A2
公开(公告)日：1998-06-24
申请号：EP96937998.0
申请日：1996-09-06
发明人： MAGORI, Valentin
CPC分类号： G01S7/023 , G01S7/352 , G01S7/4021 , G01S13/34
摘要： A reference unit (REF) is fitted beside a continuous-wave radar (DSR) to improve the accuracy of measurement. Said reference unit has a surface wave component (OFW) to generate a signal with a delay in relation to the transmitted signal. A mixer (M12) is used to produce a mixed signal from the delayed and transmitted signals which is used for rangefinding in conjunction with the measurement signal arising from the continuous-wave radar (DSR).
摘要翻译： 参考单元（REF）安装在连续波雷达（DSR）旁边，以提高测量精度。 所述参考单元具有表面波分量（OFW）以生成相对于所传送的信号具有延迟的信号。 使用混频器（M12）从延迟信号和发射信号中产生混合信号，该信号用于与连续波雷达（DSR）产生的测量信号一起进行测距。
-
公开(公告)号：EP0844493A1
公开(公告)日：1998-05-27
申请号：EP98200005.1
申请日：1992-12-09
申请人： RAYTHEON COMPANY
发明人： O'Leary, Thomas M. , Drake, Peter R. ,
IPC分类号： G01S7/282
CPC分类号： G01S7/023 , G01S7/282 , H03F1/083 , H03F2200/198 , H03H7/255
摘要： Spurious frequencies are suppressed in a transmitter (7) by an RF pulse fall time controller circuit (10) having a quadrature hybrid matched attenuator (23) located between a predriver (8) which outputs substantially rectangular pulses of radio frequency signal, and the first stage of a series of class "C" common base transistor amplifiers (11). The controller circuit (10) linearly attenuates the RF pulses so as to slow the pulse fall time. Operation of the circuit (10) is initiated when the rising edge of a pretrigger input to a pulse shaper (12) starts a pretrigger generator (14) which then triggers the application of bias current (I BIAS ) by the pulse shaper (12) to the attenuator circuit (23). After a controlled period of time determined by a monostable (16) in a pretrigger generator (14), the pulse shaper (12) decreases the forward current bias of PIN diodes (34,38) in the attenuator (23) thereby increasing the attenuation of the RF pulses. This creates a slow pulse fall time thereby preventing the occurrence of spurious emissions which would otherwise be caused by parasitic ringing of the cascaded Class C common base transistor amplifiers (11) in the transmitter (7). The RF pulses, after passing through the cascaded amplifiers (11), are emitted by the transmitter (7) as rectangular pulses.
摘要翻译： 通过RF脉冲下降时间控制器电路（10）抑制发射机（7）中的杂散频率，该RF脉冲下降时间控制器电路（10）具有正交混合匹配衰减器（23），该正交混合匹配衰减器（23）位于基本上矩形的射频信号脉冲之间的预驱动器（8） 一类“C”级公共基极晶体管放大器（11）的阶段。 控制器电路（10）对RF脉冲进行线性衰减，以减慢脉冲下降时间。 当脉冲整形器（12）输入的预触发器的上升沿启动预触发发生器（14）时，起动电路（10）的操作，该触发器发生器（14）然后触发由脉冲整形器（12）施加偏置电流（IBIAS）至 衰减器电路（23）。 在预触发发生器（14）中由单稳态（16）确定的受控时间段之后，脉冲整形器（12）减小衰减器（23）中PIN二极管（34,38）的正向电流偏置，从而增加衰减 的RF脉冲。 这产生缓慢的脉冲下降时间，从而防止由发射机（7）中级联的C级公共基极晶体管放大器（11）的寄生振荡引起的杂散发射的发生。 RF脉冲在通过级联放大器（11）之后，由发射器（7）作为矩形脉冲发射。
-
75.发明公开Radargerät mit reduzierter abgestrahlter Leistung 失效Radargerätmit reduzierter abgestrahlter Leistung
公开(公告)号：EP0758093A2
公开(公告)日：1997-02-12
申请号：EP96111287.7
申请日：1996-07-12
发明人： Höss, Alfred, Dr.
CPC分类号： G01S7/023 , G01S7/35 , G01S13/345 , G01S13/584 , G01S13/931 , G01S2013/9321 , G01S2013/9353 , G01S2013/9375
摘要： Der Leistung, die ein Radargerät im Mittel abstrahlt, wird in Abhängigkeit von der Geschwindigkeit eines Fahrzeuges, in das das Radargerät eingebaut ist, gesteuert. Dabei wird der Zeitbereich, während dessen ein Radargerätes Radarsignale sendet, proportional der Geschwindigkeit eingestellt. Der Abstrahlungswinkel, in den Radarsignale abestrahlt werden, wird ebenfalls in Abhängigkeit von der Geschwindigkeit gesteuert.
摘要翻译： 雷达装置安装在车辆上并检测车辆附近物体的位置和速度。 该设备发送和接收连续的调频信号，并且包括评估单元。 发射机（10）发射由车辆速度（15）确定的时间间隔的雷达信号。 在车辆的较高速度下，传动间隔变长，而在较低的速度下变短。 较高速度的时间间隔为pref。 增加以允许发射机相应于输出功率或频率稳定性达到预定条件。
-
76.发明授权
-
公开(公告)号：EP0549192A1
公开(公告)日：1993-06-30
申请号：EP92311209.8
申请日：1992-12-09
申请人： RAYTHEON COMPANY
IPC分类号： G01S7/282
CPC分类号： G01S7/023 , G01S7/282 , H03F1/083 , H03F2200/198 , H03H7/255
摘要： Spurious frequences are suppressed in a transmitter (7) by an RF pulse fall time controller circuit (10) having a quadrature hybrid matched attenuator (23) located between a predriver (8) and the first stage of class "C" driver amplifiers (11). The controller circuit (10) linearly attenuates RF pulses and slows pulse fall time. Operation of the circuit (10) is initiated when the rising edge of a pretrigger input to a pulse shaper (12) starts a pretrigger generator (14) which then triggers the application of bias current (I BIAS ) by the pulse shaper (12) to the attenuator circuit (23). After a controlled period of time determined by a monostable (16) in the pretrigger generator (14), the pulse shaper (12) decreases the forward current bias of PIN diodes (34,38) in the attenuator (23) thereby increasing the attenuation of the RF pulses. This creates a slow pulse fall time thereby preventing the occurence of spurious emissions which would otherwise be caused by parasitic ringing of the cascaded Class C common base transistor amplifiers (11) in the transmitter (7).
摘要翻译： 射频脉冲下降时间控制器电路（10）在发射机（7）中抑制杂散频率，该RF脉冲下降时间控制器电路（10）具有位于预驱动器（8）和类别“C”驱动放大器（11）的第一级之间的正交混合匹配衰减器 ）。 控制器电路（10）线性衰减RF脉冲并减慢脉冲下降时间。 当脉冲整形器（12）输入的预触发器的上升沿启动预触发发生器（14）时，起动电路（10）的操作，该触发器发生器（14）然后触发由脉冲整形器（12）施加偏置电流（IBIAS）至 衰减器电路（23）。 在预触发发生器（14）中由单稳态（16）确定的受控时间段之后，脉冲整形器（12）减小衰减器（23）中PIN二极管（34,38）的正向电流偏置，从而增加衰减 的RF脉冲。 这产生了缓慢的脉冲下降时间，从而防止寄生在发射机（7）中的C级公共基极晶体管放大器（11）的寄生振荡引起的杂散发射。
-
公开(公告)号：EP0508765A2
公开(公告)日：1992-10-14
申请号：EP92303144.7
申请日：1992-04-09
申请人： PEEK TRAFFIC LIMITED
CPC分类号： G01S7/023 , G01S13/343 , G01S13/58 , G01S13/931 , G08G1/08
摘要： In a vehicle presence detection system for controlling traffic signal lights at a road intersection, the vehicle detection is performed by targeting vehicles at the location of interest with an FMCW radar beam. The radar can be switched repeatedly between the FMCW mode, for vehicle presence detection, and a doppler mode, for vehicle movement detection. Signal data representing the background of the scene viewed by the radar beam are stored for use by circuitry that determines whether an apparent vehicle presence detect is a true vehicle detect ; the background signal data is repeatedly updated, as necessary, as the system cycles. Temperature compensation is provided and entry into the FMCW mode is inhibited if a voltage-controlled oscillator provided for generating the emissions has not settled down after any such compensation.
摘要翻译： 在用于控制道路交叉口处的交通信号灯的车辆存在检测系统中，通过用FMCW雷达波束对感兴趣的位置处的车辆进行车辆检测来执行车辆检测。 雷达可以在FMCW模式，车辆存在检测和多普勒模式之间重复切换，用于车辆移动检测。 表示由雷达光束观看的场景的背景的信号数据被存储以供确定视在车辆存在检测是真实车辆检测的电路使用; 随着系统循环，背景信号数据根据需要重复更新。 提供温度补偿，如果在任何此类补偿后提供用于产生排放的压控振荡器尚未结算，则禁止进入FMCW模式。
-
79.发明公开A transmitting and receiving part of a pulse doppler radar 失效发送者 - Empfängerteileines Pulsdopplerradars。
公开(公告)号：EP0499706A2
公开(公告)日：1992-08-26
申请号：EP91121141.5
申请日：1991-12-10
申请人： DORNIER GMBH
IPC分类号： G01S7/288 , G01S13/526 , G01S7/03
摘要： A transmitting and receiving part of a pulse Doppler radar, in which the transmitting oscillator, by frequency shifting, is at the same time used as a local (reception) oscillator, and the intermediate-frequency reference frequency is generated coherently with respect to the pulse repetition frequency. Since only one high-frequency oscillator is required, the quality of which does not have to meet very high requirements, a low-price pulse Doppler radar can be implemented.
摘要翻译： 脉冲多普勒雷达的发射和接收部分，其中发射振荡器通过频移同时用作本地（接收）振荡器，并且中频参考频率相对于脉冲相干地产生 重复频率。 由于只需要一个高频振荡器，其质量不能满足非常高的要求，因此可以实现低价格的脉冲多普勒雷达。
-
公开(公告)号：EP0024430B1
公开(公告)日：1984-10-24
申请号：EP80900616.6
申请日：1980-02-26
CPC分类号： G01S13/422 , B60K31/0008 , B60Q9/008 , G01S7/023 , G01S7/025 , G01S13/931 , G01S2013/9325 , G01S2013/9346 , G01S2013/9353 , G01S2013/9367
摘要： Anti-collision vehicular radar system which provides a warning of a potential collision of the vehicle with other vehicles or objects in the path of the vehicle and automatic braking. The invention utilizes a pulsed radar system (24) with overlapped antenna beams (13, 14, A, B) for off-axis object discrimination. The invention determines the pattern of change in relative velocity of the vehicle and the object which is detected by its radar to provide signals which are processed by circuitry to determine whether the detected object is a potential obstruction which must be avoided by braking or maneuvering of the vehicle. Each time the vehicle travels a predetermined, incremental distance, the radar (26) is pulsed (16). Circuitry (19) is provided which detects reflections from objects in 32 range gate intervals 10 feet in length, for example, extending in front of the vehicle. The received signal for each 10 foot range gate is a binary bit representing the presence of one or more objects within that range gate. The number of radar pulses emitted during the time a detected object remains in a single range gate interval represent the relative speed between the object and vehicle; and the relative speed of an object is stored for each range gate interval through which it passes. Variations in relative speed are compared with pre-stored values (27) which relate to apparent velocity of the vehicle with respect to a non-moving object as a function of the distance to the target and the displacement of the object from the line of travel of the vehicle. An object dead ahead will show no variation in observed relative speed and may represent a potential collision hazard, while an object not directly in the path of the vehicle will show a characteristic variation in observed speed as it passes through the range gate intervals.
-
-
-
-
-
-
-
-
-
搜索结果
455 条记录 (耗时 0.017 秒)
