可编程序控制器以其优良的特性在工业控制中得到了广泛应用。利用ＰＬＣ进行型砂性能在线检测与控制，能够准确地测量型砂的紧实率、湿压强度，并能够将型砂的紧实率波动控制在±３％的范围之内，使型砂质量保持稳定，取得了良好的应用效果。 Programmable logic controller with its excellent features in industrial control has been widely used. Using PLC for on-line testing and control of sand performance, it can accurately measure the compaction rate and wet compressive strength of sand and can control the compaction rate of sand to within ± 3%, so as to keep the sand quality stable. A good application effect.