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1. 发明申请

WO1996018084A1 MEASURING METHOD AND APPARATUS 审中-公开
标题翻译：测量方法和装置
公开(公告)号：WO1996018084A1
公开(公告)日：1996-06-13
申请号：PCT/GB1995002868
申请日：1995-12-07
申请人： HYDRONIX LIMITED , HOLLAND, Robert, Eric, Bradwell
发明人： HYDRONIX LIMITED
IPC分类号： G01D03/032
CPC分类号： G01D3/032
摘要： The present invention relates to the measurement of a property, for example moisture content in a material subject to substantially transient presence in the region of a sensor. In a concrete mixer (1) the rotation of the mixing blades (8) causes the mix to lose intimate contact with a moisture content measuring sensor (9). This introduces noise, in the form of spikes, into the sensor output. The spikes adversely affect the accuracy of the moisture content measurement. The present invention solves this problem by sampling the output of the sensor (9) in the regions between the spikes. The timing of the sampling is triggered by the occurrence of a spike in the sensor signal, either directly by comparing the time derivative of the sensor signal with a threshold or indirectly, for instance by detecting the position of a mixing blade. A variety of samples may be taken between each pair of spikes and averaged to produce an output signal representing the moisture content of the mix in the mixer (1). In another embodiment, the invention is applied to sensing the moisture content of loaves (40) on a conveyor belt (41). The gaps between loaves (40) are detected and used to trigger sampling of the output of a moisture sensor (42).
摘要翻译：本发明涉及一种性质的测量，例如在传感器区域中基本上暂时存在的材料中的水分含量。在混凝土搅拌机（1）中，混合叶片（8）的旋转导致混合物与含水量测量传感器（9）的紧密接触。这将以尖峰的形式引入到传感器输出中的噪声。尖峰对水分含量测量的准确性产生不利影响。本发明通过在尖峰之间的区域中对传感器（9）的输出进行采样来解决这个问题。采样的定时由传感器信号中的尖峰发生触发，或者直接通过比较传感器信号的时间导数与阈值或间接地例如通过检测混合叶片的位置来间接地触发。可以在每对尖峰之间采取各种样本，并将其平均以产生表示混合器（1）中混合物的水分含量的输出信号。在另一个实施例中，本发明应用于感测传送带（41）上的面包（40）的含水量。检测面包（40）之间的间隙并用于触发水分传感器（42）的输出的采样。

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