| 主权项 |
1. A harvesting head height control circuit (162) for controlling the height of an articulated harvesting head (104) that is supported on a combine harvester (102) during harvesting in an agricultural field, the articulated harvesting head (104) including a center section (146), a left section (144), and a right section (148), wherein the left section (144) is coupled to the center section (146) and extends leftward therefrom, wherein the right section (148) is coupled to the center section (146) and extends rightward therefrom, wherein a first actuator (158) is coupled to the to the left section (144) to raise the left section (144) with respect to the center section (146), wherein a second actuator (160) is coupled to the right section (148) to raise the right section (148) with respect to the center section (146), wherein the harvesting head height control circuit (162) comprises:
an ECU (164) coupled to the first actuator (158) to raise and lower the left section (144), and coupled to the second actuator (160) to raise and lower the right section (148); a first load sensor (149) coupled to the ECU (164) and disposed to sense a first force acting rearwardly against the left section (144) and configured to generate a first signal indicative of the first force; and a second load sensor (151) coupled to the ECU (164) and disposed to sense a second force acting rearwardly against the right section (148) and configured to generate a second signal indicative of the second force; wherein the ECU (164) is configured to receive the first signal and the second signal and to responsively raise and lower the left section (144) and the right section (148) based at least on a magnitude of the first signal and the second signal. |
