| 食品金属探测器原理 |
| 添加时间：2020/7/16 15:45:16 浏览次数： |
| 食品金属探测器原理 Principle of food metal detector 食品金属探测器应用电磁感原理来探测金属。所有金属包括铁和非铁都有很高的探测灵敏度。铁磁类金属进入探测区域将影响探测区域的磁力线分布，进而影响了固定范围的磁通。非铁磁类金属进入探测区域将产生涡流效应，也会使探测区域的磁场分布发生变化。引发探测器发出鸣声。探测器的精确性和可靠性取决于电磁发射器频率的稳定性，一般使用从80 to 800 kHz的工作频率。工作频率越低，对铁的检测性能越好；工作频率越高，对高碳钢的检测性能越好。检测器的灵敏度随着检测范围的增大而降低，感应信号大小取决于金属粒子尺寸和导电性能。 Food metal detector uses the principle of electromagnetic induction to detect metal. All metals, including iron and non iron, have high detection sensitivity. Ferromagnetic metals entering the detection area will affect the distribution of magnetic field lines in the detection area, and then affect the fixed range of magnetic flux. When non ferromagnetic metals enter the detection area, eddy current effect will be produced and the magnetic field distribution in the detection area will be changed. Trigger the detector to sound. The accuracy and reliability of the detector depend on the stability of the electromagnetic transmitter frequency, which is generally used from 80 to 800 kHz. The lower the working frequency, the better the detection performance of iron; the higher the working frequency, the better the detection performance of high carbon steel. The sensitivity of the detector decreases with the increase of the detection range, and the size of the induced signal depends on the size of the metal particles and the conductivity. |
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