A novel digital display electronic crane scale has been successfully developed by Shanghai Tianshui Electric Appliance Factory. It can make various lifting cranes of warehouses, docks and industrial and mining enterprises display the weight accurately and clearly while lifting the cargo. Come out, you can increase production efficiency and reduce labor consumption. The installation of this system is very simple, as shown in Figure 1, the digital display device is fixed above the crane hook. When weighing, the force is converted into a linear voltage signal through the sensor, and is placed by the chopper bridge amplifier.