随着生活水平的提高 ,对定量商品的合格率提出了更高的要求。由于计量设备技术落后 ,定量商品的称量合格率远未尽如意。目前 ,小包包装机的称量主要采取容积式和称重式２种 :容积式速度快 ,但精度较低 ;称重式精度较高 ,但设备价格较为昂贵。在种子加工中 ,大都要求５０～１０ With the improvement of living standards, the passing rate of quantitative products put forward higher requirements. As the technology behind the measurement equipment, weighing the amount of qualified products is far from satisfactory. At present, the weighing of the packet packing machine mainly adopts two kinds of volumetric and weighing methods: volumetric speed is fast, but the accuracy is low; weighing accuracy is higher, but the equipment price is more expensive. In seed processing, most require 50 to 10