Abstract: Disclosed are a voice coil motor a zoom lens and a photography device. The voice coil motor includes a machine shell, a magnet structure, a mover structure and a drive structure. The magnet structure is provided on the machine shell and includes an annular magnetic yoke. The mover structure includes a plurality of mover coils, and the plurality of mover coils are movably sleeved on a yoke section of the annular magnetic yoke. The drive structure includes a plurality of drive chips and the plurality of drive chips are electrically connected to the plurality of mover coils respectively.

Abstract: Disclosed are a voice coil motor, a zoom lens and a photography device. The voice coil motor includes a machine shell, an annular magnetic yoke, a plurality of magnets and a mover structure. The annular magnetic yoke is provided on the machine shell. The plurality of magnets are provided in the annular magnetic yoke and are provided at interval along a length direction of the annular magnetic yoke. The mover structure includes a mover coil movably sleeved on a yoke section of the annular magnetic yoke.

Abstract: Disclosed is a method for predicting corrosion and spontaneous combustion of sulfur-related petrochemical equipment. The method solves the issues in the existing techniques that includes narrow predicting range, high workload in installation and maintenance, and time lag in predicting corrosion and spontaneous combustion inside equipment. The method comprises a step of a dual index system prediction, which includes a step of monitoring a temperature and a step of detecting SO2 gas generated by spontaneous combustion. The time when spontaneous combustion occurs can be accurately calculated by using a fitted quantitative relationship formula generated by the spontaneous combustion of corrosion products. The method has a low Labor cost. The method has a low labor cost and, does not require on-site gas detection to be carried out by means of manual detection, which both reduces the cost and ensures the detection accuracy.

Abstract: Disclosed is a method for predicting corrosion and spontaneous combustion of sulfur-related petrochemical equipment. The method solves the issues in the existing techniques that includes narrow predicting range, high workload in installation and maintenance, and time lag in predicting corrosion and spontaneous combustion inside equipment. The method comprises a step of a dual index system prediction, which includes a step of monitoring a temperature and a step of detecting SO2 gas generated by spontaneous combustion. The time when spontaneous combustion occurs can be accurately calculated by using a fitted quantitative relationship formula generated by the spontaneous combustion of corrosion products. The method has a low Labor cost. The method has a low labor cost and, does not require on-site gas detection to be carried out by means of manual detection, which both reduces the cost and ensures the detection accuracy.