2.3.1. Header Power Sensor

The header is driven by a spline shaft. Under normal operating conditions, the corn silage harvester works in the way of full-width without row-control. Theoretically, it is believed that the operating power of the left header and the right header are equal. Considering the installation space on the header shaft, the original T-shaped driving shaft on the right side of the header is selected as the installation position of the sensors. Two sensors are designed to measure the dynamic power of the header in the shaft-mounting type, where the power sensor of the inside shaft is used to measure the power at the small and fixed rotary cutter disk, while the power sensor of the outside shaft is applied to measure the dynamic power of the large folding and rotary cutter disk, as shown in Figure 1.

**Figure 1.** Physical view of header power sensor. 1: power sensor of inside shaft 2: T-type drive shaft 3: power sensor of outside shaft.
