公开(公告)号：US4425793A

公开(公告)日：1984-01-17

申请号：US266869

申请日：1981-05-26

申请人： David Turton ,  Lionel R. F. Thompson

发明人： David Turton ,  Lionel R. F. Thompson

IPC分类号： G01S13/18 ,  G01S13/522 ,  G01S13/88 ,  G01F23/28

CPC分类号： G01S13/522 ,  G01S13/18 ,  G01S13/88

摘要： To measure the height of the surface of a fluent material, such as coal, in a bunker or container, pulsed radiation from a microwave source is beamed down on to said surface, and the return radiation reflected from the surface is processed to detect pulses in the waveform with time-varying amplitudes, and therefore denoting returns from the fluent material, and to reject fixed shape pulses denoting returns from the fixed structure of the bunker. To discriminate between returns of time-varying amplitude (i) from the fluent material surface and (ii) from material flowing in from an in-feed, the higher frequency components, denoting the material flowing in, are filtered out.

摘要翻译： 为了测量诸如煤之类的流体材料在掩体或容器中的表面的高度，将来自微波源的脉冲辐射向下射向所述表面，并且从表面反射的返回辐射被处理以检测脉冲 具有时变幅度的波形，因此表示来自流动材料的返回，并且拒绝表示从掩体的固定结构返回的固定形状脉冲。 为了区分来自流动材料表面的时变幅度（i）和（ii）从进给中流入的材料的回报，表示流入的材料的较高频率分量被滤出。

公开(公告)号：US4234882A

公开(公告)日：1980-11-18

申请号：US9248

申请日：1979-02-05

申请人： Lionel R. F. Thompson

发明人： Lionel R. F. Thompson

IPC分类号： G01S13/32 ,  G01S13/34

CPC分类号： G01S13/32

摘要： To measure the contents of a bunker or silo a transmitter mounted over the bunker beams down on to the contents surface a very high frequency signal that is caused repeatedly to rise and fall in frequency with either a constant sweep time and a progressively varying amplitude of frequency change or a constant amplitude and a progressively varying sweep time. The reflected target return signals are mixed with the transmitted signal to obtain a beat frequency which is filtered and processed to derive a signal representative of the range of the target, i.e. the contents surface, below the transmitter. To discriminate against target returns from fixed parts of the bunker structure, such as support members, a control unit is provided with a memory store into which are preloaded signals representative of fixed structure returns. The target returns received when the apparatus is in operation are then compared with the stored signals and any that are the same as stored signals are rejected. The control unit may also include a processor capable of distinguishing between returns from fixed targets and returns from a target moving toward or away from the transmitter.

摘要翻译： 为了测量一个掩体的内容，或者将安装在掩体光束上的发射器的筒仓放置在内容物表面上，这是一个非常高的频率信号，它会以恒定的扫描时间和逐渐变化的频率幅度重复地上升和下降 改变或恒定幅度和逐渐变化的扫描时间。 将反射的目标返回信号与所发送的信号混合以获得经过滤波和处理的拍频，以便导出表示发射机下方的目标（即内容表面）的范围的信号。 为了区分诸如支撑构件的掩体结构的固定部分的目标返回，控制单元设置有存储器存储器，其中表示固定结构返回的预加载信号。 然后将装置运行时接收到的目标返回与存储的信号进行比较，并且与存储信号相同的任何信号被拒绝。 控制单元还可以包括能够区分来自固定目标的返回和从朝向或远离发射器移动的目标返回的处理器。