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    • 4. 发明申请
    • IMPROVEMENTS IN REVERBERATORS FOR USE IN WIDE BAND ASSISTED REVERBERATION SYSTEMS
    • 用于宽带辅助反射系统的改造器的改进
    • WO1995010831A1
    • 1995-04-20
    • PCT/NZ1994000110
    • 1994-10-17
    • INDUSTRIAL RESEARCH LIMITEDPOLETTI, Mark
    • INDUSTRIAL RESEARCH LIMITED
    • G10K15/08
    • H04S3/002G10K15/12H04R27/00H04R2227/007H04S7/305
    • A multi-channel reverberation system has a substantially constant multi-channel power gain at audio frequencies and comprises multiple signal inputs, one for each input channel, a number of comb filter networks connected to each signal input, each comb filter network including a feed forward stage, a cross-coupling network cross-coupling the comb filters to increase the reverberation echo density, and multiple signal outputs, one for each output channel. Preferably the feed forward stage of each comb filter provides a substantially constant multi-channel power gain at audio frequencies and the cross-coupling matrix is an orthogonal cross-coupling matrix cross-coupling a number of single channel allpass comb filters, positioned immediately before or after the delay lines, to create a multi-channel allpass comb filter with a unitary transfer function matrix at all frequencies.
    • 多通道混响系统在音频处具有基本恒定的多声道功率增益,并且包括多个信号输入,每个输入通道一个,连接到每个信号输入的多个梳状滤波器网络,每个梳状滤波器网络包括前馈 交叉耦合网络交叉耦合梳状滤波器以增加混响回波密度,以及多个信号输出,每个输出通道一个。 优选地,每个梳状滤波器的前馈级在音频频率处提供基本上恒定的多声道功率增益,并且交叉耦合矩阵是交叉耦合多个单通道全通梳状滤波器的正交交叉耦合矩阵, 在延迟线之后,在所有频率处创建具有单一传递函数矩阵的多通道全通梳状滤波器。
    • 5. 发明申请
    • A SIGNAL COMBINER SYSTEM
    • 信号组合系统
    • WO1995006376A1
    • 1995-03-02
    • PCT/NZ1994000083
    • 1994-08-19
    • INDUSTRIAL RESEARCH LIMITEDVAUGHAN, Rodney, GrantCOULSON, Alan, JamesSCOTT, Neil, Llewellyn
    • INDUSTRIAL RESEARCH LIMITED
    • H04L27/00
    • H04L1/02H04B7/084
    • A method of signal combining, comprises the addition of a number of received bandpass signals occupying different spectral positions to give a signal sum, the spectral replication of the resulting signals using bandpass sampling, and the interpolation over at least one frequency bandwidth of the combined and spectrally relocated signals, producing a combined digital signal. The individual received signals may be first spectrally relocated to individual integer positioned intermediate frequencies where the individual received signals are not appropriately positioned for bandpass sampling and interpolation, prior to adding the signals and bandpass sampling. The bandpass sampling is preferably second-order or higher order. The method may be used in frequency or time diversity systems or for demodulating a frequency-hopping spread spectrum signal without a priori knowledge of the frequency-hop pattern.
    • 一种信号组合的方法包括加入多个接收到的带通信号以占据不同的频谱位置以给出信号和,使用带通采样对所得到的信号进行频谱复制,以及在组合和 光谱重定位信号,产生组合数字信号。 在加入信号和带通采样之前,各个接收信号可以首先被光谱地重定位到单个整数定位的中间频率,其中各个接收信号未被适当地定位用于带通采样和内插。 带通采样优选为二阶或更高阶。 该方法可以用于频率或时间分集系统中,或者用于解调跳频扩频信号,而无需对跳跳模式的先验知识。
    • 10. 发明申请
    • MEASURING AND MONITORING THE SIZE OF PARTICULATE MATERIAL
    • 测量和监测颗粒物料的尺寸
    • WO1993022652A1
    • 1993-11-11
    • PCT/NZ1993000028
    • 1993-04-23
    • INDUSTRIAL RESEARCH LIMITEDDAVIES, Clive, Eric
    • INDUSTRIAL RESEARCH LIMITED
    • G01N15/02
    • G01F1/52G01F1/30G01F1/76G01F1/86G01G11/08G01N9/02G01N15/02
    • Apparatus for monitoring a characteristic diameter of a flowing particulate material, comprises a chamber (31) having a particle size measurement outlet (33) of known dimensions through which the flowing material passes, means to determine the flow rate of the material, and means to determine the characteristic diameter of the material by reference to the dimensions of the particle size measurement outlet, the bulk density, and the flow rate of the material. The bulk density may be known or measured. The flow rate of material may be measured in a second chamber (34) having another outlet (37) through which the material flow also passes. The flow rate measurement outlet may be in the form of a slot (37). Flow rate is determined by reference to the height (h2) of material flow through the slot. Bulk density may be determined by maintaining a constant volume of material in the chamber with the particle size measurement outlet, and by reference to changes in the weight (31b) of the contents of this chamber.
    • 用于监测流动的颗粒材料的特征直径的装置包括具有流动材料通过的已知尺寸的粒度测量出口(33)的室(31),用于确定材料流速的装置 通过参考颗粒尺寸测量出口的尺寸,体积密度和材料的流速来确定材料的特征直径。 体积密度可以是已知的或测量的。 可以在具有另一个出口(37)的第二室(34)中测量材料的流速,物料流也通过该出口流过。 流量测量出口可以是槽(37)的形式。 流速通过参考通过槽的材料流的高度(h2)来确定。 体积密度可以通过使用具有粒度测量出口的腔室中保持恒定体积的材料,并参考该室的内容物重量(31b)的变化来确定。