1、金属因素
1. Metal factors
包括金属的类型、金属污染物在被检测产品中的方向及位置。金属类型主要分为既导电又导磁的金属，如铁及可着磁的不锈钢都是很容易被检测出来的。金属污染物的方向性主要是指当导磁性金属与运行方向平行时不容易检测；导电性金属与运行方向垂直时容易检测。
It includes the type of metal, the direction and location of metal contaminants in the detected products. Metal types are mainly divided into conductive and magnetic conductive metals, such as iron and stainless steel, which can be easily detected. Directionality of metal pollutants mainly refers to that it is not easy to detect when the conductive metal is parallel to the running direction, and that the conductive metal is easy to detect when it is perpendicular to the running direction.
2、环境因素
2. Environmental factors
检测机电源的电磁干扰、设备振动、温度变化、周围磁场变化都会造成检测机的误报警，像这一类环境因素除非通过良好的设计方案解决这一问题，否则只能通过降低灵敏度来解决误报警。
The electromagnetic interference of the power supply, the vibration of the equipment, the change of temperature and the change of the magnetic field around the detector will cause the false alarm of the detector. Such environmental factors as this can only solve the false alarm by reducing the sensitivity unless the problem is solved by a good design scheme.
3、检测产品因素
3. Detection of product factors
包括产品的类型、产品温度。产品类型是指产品的盐性、酸性成分含量多少直接影响产品的导电性，盐、酸含量越多，导电性越强，产品效应越大，相对检测就难，灵敏度就低；温度越高，从化学角度讲分子运动性越强，导电性也越强，相对来说检测就有点难度，不过如果能降低设备工作频率，进行产品补偿，压制产品效应，不念旧恶能相对挽救这一因素的。
Including product type and product temperature. Product type refers to the content of salt and acid components directly affects the conductivity of products. The more salt and acid content, the stronger the conductivity, the greater the product effect, the more difficult the relative detection and the dianzugui.37ix.com.cnmuzhisuxw.37ix.com.cnbianyaqi.37ix.com.cn shidiaogyp.37ix.com.cnhaibaiyu.37ix.com.cnshengtaim.37ix.com.cnlower the sensitivity. The higher the temperature, the stronger the molecular mobility and the stronger the conductivity from the chemical point of view, the more difficult the detection is, but if the equipment working frequency can be reduced. To compensate for the product, suppress the effect of the product, and forget the old evil energy to save this factor relatively.
4、检测机本身因素
4. The factors of the testing machine itself
检测机本身的因素包括开口尺寸、机器频率、运行速度及皮带信号大小。开口尺寸越大检测灵敏度越低，开口尺寸越小，相对检测精度越高。机器频率越高，相应的检测灵敏度也越高。
The factors of the testing machine itself include opening size, machine frequency, running speed and belt signal size. The larger the opening size, the lower the detection sensitivity, the smaller the opening size, and the higher the relative detection accuracy. The higher the machine frequency, the higher the detection sensitivity.