金属检测仪资料（Metal detector data）.docVIP

金属检测仪资料（Metal detector data） Metal detector detailed The metal detector applies the electromagnetic sense principle to detect metals. All metals, including iron and non ferrous, have very high detection sensitivity. Ferromagnetic metal entering the detection area will affect the distribution of magnetic lines in the detection area, thereby affecting the fixed range of magnetic flux. The vortex effect of non ferromagnetic metal into the detection region, also can make the detecting area of the magnetic field distribution changes usually metal detector is composed of two parts, namely, metal detector and automatic removing device, which is the core part of the detector. The detector internal distribution of the three groups of coils, namely the central transmitting coil and two pairs of the receiving coil through the transmitting coil connected between the oscillator to generate high frequency variable magnetic field, induction voltage receiving coil on both sides of the idle state are offset in the magnetic field undisturbed before to reach equilibrium. Once the metal impurities into the magnetic field, the magnetic field interference, this balance is broken, two coil induced voltage cannot be offset, not offset by the induction voltage control system via amplification processing, and generate an alarm signal (metal impurity detection). The system can use the alarm signal to drive the automatic elimination device and so on, so that the metal impurities are excluded from the production line. Edit the features and concepts of this metal detector: The accuracy and reliability of the metal detector depend on the frequency stability of the electromagnetic launcher, which is normally used from 80 to to 800 kHz operating frequency. The lower the operating 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 as the detection range increas