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公开(公告)号：EP0091172B1
公开(公告)日：1988-06-29
申请号：EP83200468.3
申请日：1983-04-05
CPC分类号： F42C13/04 , G01S13/505
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公开(公告)号：EP0091172A2
公开(公告)日：1983-10-12
申请号：EP83200468.3
申请日：1983-04-05
CPC分类号： F42C13/04 , G01S13/505
摘要： The invention relates to an electromagnetic proximity fuse operating with transmission of an electromagnetic HF-wave and reception of a reflected wave received after reflection against an object, which reflected wave is combined with the transmitted one for generating a signal of doppler frequency (f a ) or so called doppler signal, which is used to initiate an ignition circuit. According to the invention the said doppler signal is led to an analogue divider (12) together with a delayed version of the said doppler signal. The analogue divider (12) delivers an output signal of doppler frequency (f d ), the amplitude of which is equal to the quotient between the prevailing value (U 1 ) of the doppler signal and the value of the doppler signal a predetermined time interval previously (U 2 ). This quotient signal of dopper frequency is led to a filter (15), which at least approximately has a frequency characteristic equal to 1/(f o + f), where f o is a system parameter and f is the input frequency, i.e. in the present case equal to the doppler frequency (f d ). The output signal from the filter (15) is finally led to an ignition circuit (17) via a threshold circuit (6) having a fixed threshold in order to initiate the ignition circuit (17), when the output signal from the filter exceeds a given value. Hereby the ignition circuit (17) will be triggered at a constant distance from the reflecting object independently of such unknown variables as the approaching speed, the reflection factor of the object and the gain factor of the HF-system.
摘要翻译： 本发明涉及一种电磁接近保险丝，其操作与电磁HF波的传输和反射物体接收的反射波接收，该反射波与被传输的反射波组合，用于产生多普勒频率（fd）或 所谓的多普勒信号，用于启动点火电路。 根据本发明，所述多普勒信号与所述多普勒信号的延迟版本一起被引导到模拟分频器（12）。 模拟分频器（12）传送多普勒频率（fd）的输出信号，其幅度等于多普勒信号的当前值（U1）与先前预定时间间隔的多普勒信号的值之间的商 U2）。 掺杂频率的商信号被引导到滤波器（15），其至少近似具有等于1 /（fo + f）的频率特性，其中fo是系统参数，f是输入频率，即。 在当前情况下等于多普勒频率（fd）。 当来自滤波器的输出信号超过一个时，来自滤波器（15）的输出信号最终通过具有固定阈值的阈值电路（6）引导到点火电路（17），以启动点火电路（17） 给定值。 因此，点火电路（17）将以与反射物体恒定的距离触发，独立于诸如接近速度，物体的反射系数和HF系统的增益因子等未知变量。
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公开(公告)号：EP0091172A3
公开(公告)日：1984-03-28
申请号：EP83200468
申请日：1983-04-05
CPC分类号： F42C13/04 , G01S13/505
摘要： The invention relates to an electromagnetic proximity fuse operating with transmission of an electromagnetic HF-wave and reception of a reflected wave received after reflection against an object, which reflected wave is combined with the transmitted one for generating a signal of doppler frequency (f a ) or so called doppler signal, which is used to initiate an ignition circuit. According to the invention the said doppler signal is led to an analogue divider (12) together with a delayed version of the said doppler signal. The analogue divider (12) delivers an output signal of doppler frequency (f d ), the amplitude of which is equal to the quotient between the prevailing value (U 1 ) of the doppler signal and the value of the doppler signal a predetermined time interval previously (U 2 ). This quotient signal of dopper frequency is led to a filter (15), which at least approximately has a frequency characteristic equal to 1/(f o + f), where f o is a system parameter and f is the input frequency, i.e. in the present case equal to the doppler frequency (f d ). The output signal from the filter (15) is finally led to an ignition circuit (17) via a threshold circuit (6) having a fixed threshold in order to initiate the ignition circuit (17), when the output signal from the filter exceeds a given value. Hereby the ignition circuit (17) will be triggered at a constant distance from the reflecting object independently of such unknown variables as the approaching speed, the reflection factor of the object and the gain factor of the HF-system.
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