Abstract: A system includes a detection device configured to transmit and receive one or more signals in a generally vertical direction above a vehicle. Additionally, the system may include a processing device configured to measure a time of flight associated with the transmission and receipt of the one or more signals in the generally vertical direction. A distance travelled by the one or more signals may be determined based, at least in part, on the measured time of flight, and the distance travelled may be compared with a threshold distance to determine an overhead clearance of the vehicle. In response to determining the overhead clearance, a vehicle system may be activated.

Abstract: A system includes a detection device configured to transmit and receive one or more signals in a generally vertical direction above a vehicle. Additionally, the system may include a processing device configured to measure a time of flight associated with the transmission and receipt of the one or more signals in the generally vertical direction. A distance travelled by the one or more signals may be determined based, at least in part, on the measured time of flight, and the distance travelled may be compared with a threshold distance to determine an overhead clearance of the vehicle. In response to determining the overhead clearance, a vehicle system may be activated.

Abstract: A system includes a detection device configured to transmit and receive one or more signals in a generally vertical direction above a vehicle. Additionally, the system may include a processing device configured to measure a time of flight associated with the transmission and receipt of the one or more signals in the generally vertical direction. A distance travelled by the one or more signals may be determined based, at least in part, on the measured time of flight, and the distance travelled may be compared with a threshold distance to determine an overhead clearance of the vehicle. In response to determining the overhead clearance, a vehicle system may be activated.

Abstract: The present invention relates to a process for hydrocracking SGE of carbonaceous material to produce light distillate, including chemical feedstocks and transport fuels.A mixture of crushed coal and a solvent is fed to an extractor 1 wherein the solvent is heated and pressurized to form a supercritical gas. Carbonaceous material is extracted from the coal into the gas. The unextracted coal, including ash and some carbonaceous material, is separated from the SGE in solution in the supercritical solvent in a separation stage 2. The SGE in the solvent is maintained in the supercritical state and fed to a hydrocracking stage 3 wherein it is mixed with excess hydrogen. After hydrocracking, the SGE in supercritical solution is passed through a pressure let-down valve 4 to a distillation stage 5 wherein the product of the hydrocracking stage 3 is separated into gases, solvent for recycling, light distillate and material boiling above 350.degree. C.