초록 ▼

The present invention generally provides a method of automatic control for a scraper bowl by measuring a first force as applied to the scraper bowl during forward movement of the scraper. Preferably, the first force is derived by measuring the hydraulic pressure within the hydraulic actuator that co

The present invention generally provides a method of automatic control for a scraper bowl by measuring a first force as applied to the scraper bowl during forward movement of the scraper. Preferably, the first force is derived by measuring the hydraulic pressure within the hydraulic actuator that controls the scraper bowl. A target force value is then subtracted from the first force to obtain a force error signal which is converted into a position command signal. The position command signal is preferably used to automatically adjust the depth of cut performed by the scraper blade without diversion of the operator's attention. Additionally, the scraper blade can be further controlled by constraining the vertical adjustment speed signal of the cutting blade to prevent the cutting blade from digging to deep or breaking through the ground by providing an upper constraint limit and a lower constraint limit which can be set according to tractive effort and the material condition acting upon the scraper blade.

대표청구항 ▼

[ What is claimed is:] [17.] A system to control the cutting depth of a scraper bowl comprising:a scraper bowl;an actuator connected to said scraper bowl, said actuator operable to moveably actuate said scraper bowl;a sensor adjacent said actuator, said sensor measuring a first force acting upon sai

[ What is claimed is:] [17.] A system to control the cutting depth of a scraper bowl comprising:a scraper bowl;an actuator connected to said scraper bowl, said actuator operable to moveably actuate said scraper bowl;a sensor adjacent said actuator, said sensor measuring a first force acting upon said scraper bowl;a computer communicating with said sensor, said computer comparing said first force to a target force value signal to generate a force error signal, said computer calculating a position command signal in relation to said force error signal and communicating said position command signal to said actuator to adjust said scraper bowl.